From patchwork Thu Jul 27 08:04:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329162 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 199E3C8D1 for ; Thu, 27 Jul 2023 08:07:25 +0000 (UTC) Received: from mail-pf1-x42b.google.com (mail-pf1-x42b.google.com [IPv6:2607:f8b0:4864:20::42b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 580CA10FA for ; Thu, 27 Jul 2023 01:07:01 -0700 (PDT) Received: by mail-pf1-x42b.google.com with SMTP id d2e1a72fcca58-686f6231bdeso112251b3a.1 for ; Thu, 27 Jul 2023 01:07:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445160; x=1691049960; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=CmSKD1W4o1llBpukOwDAPdWOg+LYzWoL67ya0UPwqvg=; b=bWsdCjXI/QTCbfrXnl1D1RHs1UzV532bO1xy0F2QKWdmxdeZNg1bc8fwYppoEa2Sii fv3Dw05OLiEoJFGdDqA0cK2BR0yissZW0QGh0p8G2jYOCo1VM3qmhhRKOuDu3Ld44+HC IlU/6E6PL7OGmulpkRgvQIFGvR7K7vSKmFATJlzNsM5VU0kfb+Q9ux9XLDln9HSGLjNa erFo50JbYYva+gdlhuASAFmcGCxJk1UklUElA3OcQq/NsulVXFSALP8x8A3jEL8k5O2s pAuqLDXkBW250K5e8xHlcez81V5k+DmAOms7sfdEUrryxL8JhS9LUOK5EJtF0pDaEYI9 8JWQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445160; x=1691049960; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=CmSKD1W4o1llBpukOwDAPdWOg+LYzWoL67ya0UPwqvg=; b=h39FHb1E3UxezbWcsm9TgH3pE3WLh+R0aadmkR7V49DGuu0NNgM63S7ek+4S+ZP1Cy zaMo2peGvyW/6CA0fHFM8p9bxq09umW5UBi2O3rSMdVsfsJ9tQ9Ut9fDGo4iGdhHZR5F VzcaOOaCdESP5s6FxbdRp2s5AvVx5/d9JZl8weWjZ3mQOf6APhwELSKmvN6gTQrB9ub+ KzpAx7Ynr2i3BYnWQHlmhPvZWb3/Ibbvw4cHK44mGSKqFt4Ru32tPHzWPmhBVXvT1eX9 NLVOCEEmcqlxDv5OD5eXID5YZDUJQ6Pf745hWLVRdZLBnSR7DvwlHmsUfpJAM7L5mEIF Yqgw== X-Gm-Message-State: ABy/qLZJ7u8L4YbWEM8c3Nt9qYWayx2ke9yWrVw8W99WqoI3Ce04lDBt i+wU9qfuUJ0ybCO2d/DQ4aismg== X-Google-Smtp-Source: APBJJlGsBl3klUilUFzaktHEHOMbkNlcOB/1K8g6HjcIbYlgfdxi92AgDTolw1HjCRkDLU6/tzA6hQ== X-Received: by 2002:a05:6a21:78a8:b0:137:3eba:b81f with SMTP id bf40-20020a056a2178a800b001373ebab81fmr6002609pzc.3.1690445159927; Thu, 27 Jul 2023 01:05:59 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.05.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:05:59 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Carlos Llamas Subject: [PATCH v3 01/49] binder: fix memory leak in binder_init() Date: Thu, 27 Jul 2023 16:04:14 +0800 Message-Id: <20230727080502.77895-2-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net In binder_init(), the destruction of binder_alloc_shrinker_init() is not performed in the wrong path, which will cause memory leaks. So this commit introduces binder_alloc_shrinker_exit() and calls it in the wrong path to fix that. Fixes: f2517eb76f1f ("android: binder: Add global lru shrinker to binder") Signed-off-by: Qi Zheng Acked-by: Carlos Llamas --- drivers/android/binder.c | 1 + drivers/android/binder_alloc.c | 6 ++++++ drivers/android/binder_alloc.h | 1 + 3 files changed, 8 insertions(+) diff --git a/drivers/android/binder.c b/drivers/android/binder.c index 486c8271cab7..d720f93d8b19 100644 --- a/drivers/android/binder.c +++ b/drivers/android/binder.c @@ -6617,6 +6617,7 @@ static int __init binder_init(void) err_alloc_device_names_failed: debugfs_remove_recursive(binder_debugfs_dir_entry_root); + binder_alloc_shrinker_exit(); return ret; } diff --git a/drivers/android/binder_alloc.c b/drivers/android/binder_alloc.c index 662a2a2e2e84..e3db8297095a 100644 --- a/drivers/android/binder_alloc.c +++ b/drivers/android/binder_alloc.c @@ -1087,6 +1087,12 @@ int binder_alloc_shrinker_init(void) return ret; } +void binder_alloc_shrinker_exit(void) +{ + unregister_shrinker(&binder_shrinker); + list_lru_destroy(&binder_alloc_lru); +} + /** * check_buffer() - verify that buffer/offset is safe to access * @alloc: binder_alloc for this proc diff --git a/drivers/android/binder_alloc.h b/drivers/android/binder_alloc.h index 138d1d5af9ce..dc1e2b01dd64 100644 --- a/drivers/android/binder_alloc.h +++ b/drivers/android/binder_alloc.h @@ -129,6 +129,7 @@ extern struct binder_buffer *binder_alloc_new_buf(struct binder_alloc *alloc, int pid); extern void binder_alloc_init(struct binder_alloc *alloc); extern int binder_alloc_shrinker_init(void); +extern void binder_alloc_shrinker_exit(void); extern void binder_alloc_vma_close(struct binder_alloc *alloc); extern struct binder_buffer * binder_alloc_prepare_to_free(struct binder_alloc *alloc, From patchwork Thu Jul 27 08:04:15 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329278 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 00B34C8D1 for ; Thu, 27 Jul 2023 08:07:32 +0000 (UTC) Received: from mail-pf1-x42c.google.com (mail-pf1-x42c.google.com [IPv6:2607:f8b0:4864:20::42c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2C8A7421E for ; Thu, 27 Jul 2023 01:07:15 -0700 (PDT) Received: by mail-pf1-x42c.google.com with SMTP id d2e1a72fcca58-6748a616e17so182241b3a.1 for ; Thu, 27 Jul 2023 01:07:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445172; x=1691049972; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=hMz0NiXWW4aad/y0uXjwCFa/Ag/H17CXQFU4sIH/+zs=; b=AHxGvLfHLl40j8B2JJRU5s4VfBVIfkKAsI0cQEyx34RUKm+kvHJrB2iQzGzRnBcS3v 6USwrAVD49Q91VdWL412Beuc1lh9luLsvseTAfwZXNQFTlfXj/44XL3QSDLO3kE477UK PuQisTQDtaTenLhmz9UxJrWIk76t/9C2sGl3AoIFTG0F/GG2DtEXlZsFxPta58HNNxGh nuotqk/EcRuGp6B6DpQqHvzB1OaU8/LVfrpsdfcpoHM2+LjVOOXNlq+MDZzMAY0XeOby XoS1N9oa25ZJEGOvTPLqpEaa/2bkazEZHcopiam72Y0TXS5KlF1vjQrUn3lGIfR4Oiwn FzZg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445172; x=1691049972; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=hMz0NiXWW4aad/y0uXjwCFa/Ag/H17CXQFU4sIH/+zs=; b=Osq1NQnMfobjg76EHBxHhlwhblgY+l90XVMofYrW3VuyMJWctNtGGocgavxVSjWaSu gmPAH3YGowMmFBKYdfHcZBLf+FwjkpORfy+jSQWivFEUNe5Lc615tSoBev5J/mbp5cwp ia4VOTVJ6n1qJ8HmJji0wJ31Jn+qAJPyEWkQmWlCjSepXpNE1AB3WPWke8OXzC3DiYUY nF7A19rDkb+2tagbALQo5L1OId5oPd9ddrkFshmSnuwzO7TTmH2CeiDfzxPz9vGIdYZN ob6dZNVqfLqSsx88yawy/JyYfhJEJKPDfkjMewuLoJHZOp/aVQxOeDq+fO4vVKt33L1s M3Bg== X-Gm-Message-State: ABy/qLaLI45NiY6TeyI/u4qQFSRvfAn/UmhU3xBgW5yczoHNqaWE4rBh J7QYPtk+K4tbaprWLdUx71c45g== X-Google-Smtp-Source: APBJJlELtr5cWJQ0To//AtRPEOYgFBMbhSo+p4MsXdX0IoPp5bJSVuIL2HKgeywTxbzsVW+qtVe8tQ== X-Received: by 2002:a05:6a00:4792:b0:668:834d:4bd with SMTP id dh18-20020a056a00479200b00668834d04bdmr4674312pfb.0.1690445172123; Thu, 27 Jul 2023 01:06:12 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.06.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:06:11 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH v3 02/49] mm: move some shrinker-related function declarations to mm/internal.h Date: Thu, 27 Jul 2023 16:04:15 +0800 Message-Id: <20230727080502.77895-3-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net The following functions are only used inside the mm subsystem, so it's better to move their declarations to the mm/internal.h file. 1. shrinker_debugfs_add() 2. shrinker_debugfs_detach() 3. shrinker_debugfs_remove() Signed-off-by: Qi Zheng --- include/linux/shrinker.h | 19 ------------------- mm/internal.h | 28 ++++++++++++++++++++++++++++ 2 files changed, 28 insertions(+), 19 deletions(-) diff --git a/include/linux/shrinker.h b/include/linux/shrinker.h index 224293b2dd06..8dc15aa37410 100644 --- a/include/linux/shrinker.h +++ b/include/linux/shrinker.h @@ -106,28 +106,9 @@ extern void free_prealloced_shrinker(struct shrinker *shrinker); extern void synchronize_shrinkers(void); #ifdef CONFIG_SHRINKER_DEBUG -extern int shrinker_debugfs_add(struct shrinker *shrinker); -extern struct dentry *shrinker_debugfs_detach(struct shrinker *shrinker, - int *debugfs_id); -extern void shrinker_debugfs_remove(struct dentry *debugfs_entry, - int debugfs_id); extern int __printf(2, 3) shrinker_debugfs_rename(struct shrinker *shrinker, const char *fmt, ...); #else /* CONFIG_SHRINKER_DEBUG */ -static inline int shrinker_debugfs_add(struct shrinker *shrinker) -{ - return 0; -} -static inline struct dentry *shrinker_debugfs_detach(struct shrinker *shrinker, - int *debugfs_id) -{ - *debugfs_id = -1; - return NULL; -} -static inline void shrinker_debugfs_remove(struct dentry *debugfs_entry, - int debugfs_id) -{ -} static inline __printf(2, 3) int shrinker_debugfs_rename(struct shrinker *shrinker, const char *fmt, ...) { diff --git a/mm/internal.h b/mm/internal.h index 5a03bc4782a2..8aeaf16ae039 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -1135,4 +1135,32 @@ struct vma_prepare { struct vm_area_struct *remove; struct vm_area_struct *remove2; }; + +/* + * shrinker related functions + */ + +#ifdef CONFIG_SHRINKER_DEBUG +extern int shrinker_debugfs_add(struct shrinker *shrinker); +extern struct dentry *shrinker_debugfs_detach(struct shrinker *shrinker, + int *debugfs_id); +extern void shrinker_debugfs_remove(struct dentry *debugfs_entry, + int debugfs_id); +#else /* CONFIG_SHRINKER_DEBUG */ +static inline int shrinker_debugfs_add(struct shrinker *shrinker) +{ + return 0; +} +static inline struct dentry *shrinker_debugfs_detach(struct shrinker *shrinker, + int *debugfs_id) +{ + *debugfs_id = -1; + return NULL; +} +static inline void shrinker_debugfs_remove(struct dentry *debugfs_entry, + int debugfs_id) +{ +} +#endif /* CONFIG_SHRINKER_DEBUG */ + #endif /* __MM_INTERNAL_H */ From patchwork Thu Jul 27 08:04:16 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329279 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D8873D2E3 for ; Thu, 27 Jul 2023 08:07:39 +0000 (UTC) Received: from mail-pf1-x435.google.com (mail-pf1-x435.google.com [IPv6:2607:f8b0:4864:20::435]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9CC8949DD for ; Thu, 27 Jul 2023 01:07:20 -0700 (PDT) Received: by mail-pf1-x435.google.com with SMTP id d2e1a72fcca58-6862d4a1376so188227b3a.0 for ; Thu, 27 Jul 2023 01:07:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445184; x=1691049984; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=vI5hWAAeOUoE+dMovb/D2X/oBxOfX13HzrcTYb1vz0I=; b=dFcunJeB79ox2F0Rn+L+Ss/aWoXzDxKcNTgoMtSiuj+R85Grv/ifhPoCAYtSbfGHwD TN0TMZIT88znj2keZ9rlGhcrxVh5zoF7ou5zBLgFYZ+8GtzSkW6ttwEwzrVZ73rrcsKk Bt5NstGzjNj5wQR0SJsSiScfi/AoSbSgUURLi5AbKNlwLcHNXojaazr7TUzXr0VxgpPh ilOatJLN9iwU3xsY4z4CNud6NNYXu/Juzbmnr02ENPJJbLqLArfiZgortFTjSKEVsx2h SvmWtZ3p0UXGsnvcQZtSSU/TR+kHNVgIw9puhY5Un5ogXuVZgRJ5ohSqB3ZskthfsuP1 MspA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445184; x=1691049984; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=vI5hWAAeOUoE+dMovb/D2X/oBxOfX13HzrcTYb1vz0I=; b=ONxrnQ5BexhIIynjHMZbT1arS8k09RVj2DysbpITKtIcg5BFYV1SayASZajWtLR+U1 Bd9Yp/cL9S9rBrkupBeNkxXIA8kmXaVmgZ+X4sWn/MLLaLHFXuCKuecwQtaTQJ5RtlFI 05H00iYsPhTsc2YRCYnTKLou/K2msW5ZsYwKifO6zBEPW6s8OBQimARtsrUlW+oDLKHT z9oD7YwaGC+RY6Mcmw03HL4S14R9bKQQx8w9nLXceLgosnxo6gWRL3sdCqGThQkz+dER v3NU45VfUIXjx5IIgJY9Zj/uTaP2QcV4IEIK8Opk8/5gAUKij3FcxflhkdgZtQZH2N1W xrAg== X-Gm-Message-State: ABy/qLY/mkaSzE34JkAagNZFfj7S1PQoUzpSXdtAYmAGESPW2SIgLH4Z 65kblpwXPnvzDLJX/dAwm4/0jg== X-Google-Smtp-Source: APBJJlEb99v7+CdH8B0GZsAuMmdcyj4bEuOvXz2nhojj2e+pKLrqUoZ6mCJVVpRQiMktWs/uO/mPuA== X-Received: by 2002:a05:6a20:3d21:b0:134:76d6:7f7 with SMTP id y33-20020a056a203d2100b0013476d607f7mr5758628pzi.4.1690445184293; Thu, 27 Jul 2023 01:06:24 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.06.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:06:23 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH v3 03/49] mm: vmscan: move shrinker-related code into a separate file Date: Thu, 27 Jul 2023 16:04:16 +0800 Message-Id: <20230727080502.77895-4-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net The mm/vmscan.c file is too large, so separate the shrinker-related code from it into a separate file. No functional changes. Signed-off-by: Qi Zheng --- mm/Makefile | 4 +- mm/internal.h | 2 + mm/shrinker.c | 709 ++++++++++++++++++++++++++++++++++++++++++++++++++ mm/vmscan.c | 701 ------------------------------------------------- 4 files changed, 713 insertions(+), 703 deletions(-) create mode 100644 mm/shrinker.c diff --git a/mm/Makefile b/mm/Makefile index e6d9a1d5e84d..48a2ab9f86ac 100644 --- a/mm/Makefile +++ b/mm/Makefile @@ -48,8 +48,8 @@ endif obj-y := filemap.o mempool.o oom_kill.o fadvise.o \ maccess.o page-writeback.o folio-compat.o \ - readahead.o swap.o truncate.o vmscan.o shmem.o \ - util.o mmzone.o vmstat.o backing-dev.o \ + readahead.o swap.o truncate.o vmscan.o shrinker.o \ + shmem.o util.o mmzone.o vmstat.o backing-dev.o \ mm_init.o percpu.o slab_common.o \ compaction.o show_mem.o\ interval_tree.o list_lru.o workingset.o \ diff --git a/mm/internal.h b/mm/internal.h index 8aeaf16ae039..8b82038dcc6a 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -1139,6 +1139,8 @@ struct vma_prepare { /* * shrinker related functions */ +unsigned long shrink_slab(gfp_t gfp_mask, int nid, struct mem_cgroup *memcg, + int priority); #ifdef CONFIG_SHRINKER_DEBUG extern int shrinker_debugfs_add(struct shrinker *shrinker); diff --git a/mm/shrinker.c b/mm/shrinker.c new file mode 100644 index 000000000000..043c87ccfab4 --- /dev/null +++ b/mm/shrinker.c @@ -0,0 +1,709 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include +#include + +#include "internal.h" + +LIST_HEAD(shrinker_list); +DECLARE_RWSEM(shrinker_rwsem); + +#ifdef CONFIG_MEMCG +static int shrinker_nr_max; + +/* The shrinker_info is expanded in a batch of BITS_PER_LONG */ +static inline int shrinker_map_size(int nr_items) +{ + return (DIV_ROUND_UP(nr_items, BITS_PER_LONG) * sizeof(unsigned long)); +} + +static inline int shrinker_defer_size(int nr_items) +{ + return (round_up(nr_items, BITS_PER_LONG) * sizeof(atomic_long_t)); +} + +void free_shrinker_info(struct mem_cgroup *memcg) +{ + struct mem_cgroup_per_node *pn; + struct shrinker_info *info; + int nid; + + for_each_node(nid) { + pn = memcg->nodeinfo[nid]; + info = rcu_dereference_protected(pn->shrinker_info, true); + kvfree(info); + rcu_assign_pointer(pn->shrinker_info, NULL); + } +} + +int alloc_shrinker_info(struct mem_cgroup *memcg) +{ + struct shrinker_info *info; + int nid, size, ret = 0; + int map_size, defer_size = 0; + + down_write(&shrinker_rwsem); + map_size = shrinker_map_size(shrinker_nr_max); + defer_size = shrinker_defer_size(shrinker_nr_max); + size = map_size + defer_size; + for_each_node(nid) { + info = kvzalloc_node(sizeof(*info) + size, GFP_KERNEL, nid); + if (!info) { + free_shrinker_info(memcg); + ret = -ENOMEM; + break; + } + info->nr_deferred = (atomic_long_t *)(info + 1); + info->map = (void *)info->nr_deferred + defer_size; + info->map_nr_max = shrinker_nr_max; + rcu_assign_pointer(memcg->nodeinfo[nid]->shrinker_info, info); + } + up_write(&shrinker_rwsem); + + return ret; +} + +static struct shrinker_info *shrinker_info_protected(struct mem_cgroup *memcg, + int nid) +{ + return rcu_dereference_protected(memcg->nodeinfo[nid]->shrinker_info, + lockdep_is_held(&shrinker_rwsem)); +} + +static int expand_one_shrinker_info(struct mem_cgroup *memcg, + int map_size, int defer_size, + int old_map_size, int old_defer_size, + int new_nr_max) +{ + struct shrinker_info *new, *old; + struct mem_cgroup_per_node *pn; + int nid; + int size = map_size + defer_size; + + for_each_node(nid) { + pn = memcg->nodeinfo[nid]; + old = shrinker_info_protected(memcg, nid); + /* Not yet online memcg */ + if (!old) + return 0; + + /* Already expanded this shrinker_info */ + if (new_nr_max <= old->map_nr_max) + continue; + + new = kvmalloc_node(sizeof(*new) + size, GFP_KERNEL, nid); + if (!new) + return -ENOMEM; + + new->nr_deferred = (atomic_long_t *)(new + 1); + new->map = (void *)new->nr_deferred + defer_size; + new->map_nr_max = new_nr_max; + + /* map: set all old bits, clear all new bits */ + memset(new->map, (int)0xff, old_map_size); + memset((void *)new->map + old_map_size, 0, map_size - old_map_size); + /* nr_deferred: copy old values, clear all new values */ + memcpy(new->nr_deferred, old->nr_deferred, old_defer_size); + memset((void *)new->nr_deferred + old_defer_size, 0, + defer_size - old_defer_size); + + rcu_assign_pointer(pn->shrinker_info, new); + kvfree_rcu(old, rcu); + } + + return 0; +} + +static int expand_shrinker_info(int new_id) +{ + int ret = 0; + int new_nr_max = round_up(new_id + 1, BITS_PER_LONG); + int map_size, defer_size = 0; + int old_map_size, old_defer_size = 0; + struct mem_cgroup *memcg; + + if (!root_mem_cgroup) + goto out; + + lockdep_assert_held(&shrinker_rwsem); + + map_size = shrinker_map_size(new_nr_max); + defer_size = shrinker_defer_size(new_nr_max); + old_map_size = shrinker_map_size(shrinker_nr_max); + old_defer_size = shrinker_defer_size(shrinker_nr_max); + + memcg = mem_cgroup_iter(NULL, NULL, NULL); + do { + ret = expand_one_shrinker_info(memcg, map_size, defer_size, + old_map_size, old_defer_size, + new_nr_max); + if (ret) { + mem_cgroup_iter_break(NULL, memcg); + goto out; + } + } while ((memcg = mem_cgroup_iter(NULL, memcg, NULL)) != NULL); +out: + if (!ret) + shrinker_nr_max = new_nr_max; + + return ret; +} + +void set_shrinker_bit(struct mem_cgroup *memcg, int nid, int shrinker_id) +{ + if (shrinker_id >= 0 && memcg && !mem_cgroup_is_root(memcg)) { + struct shrinker_info *info; + + rcu_read_lock(); + info = rcu_dereference(memcg->nodeinfo[nid]->shrinker_info); + if (!WARN_ON_ONCE(shrinker_id >= info->map_nr_max)) { + /* Pairs with smp mb in shrink_slab() */ + smp_mb__before_atomic(); + set_bit(shrinker_id, info->map); + } + rcu_read_unlock(); + } +} + +static DEFINE_IDR(shrinker_idr); + +static int prealloc_memcg_shrinker(struct shrinker *shrinker) +{ + int id, ret = -ENOMEM; + + if (mem_cgroup_disabled()) + return -ENOSYS; + + down_write(&shrinker_rwsem); + /* This may call shrinker, so it must use down_read_trylock() */ + id = idr_alloc(&shrinker_idr, shrinker, 0, 0, GFP_KERNEL); + if (id < 0) + goto unlock; + + if (id >= shrinker_nr_max) { + if (expand_shrinker_info(id)) { + idr_remove(&shrinker_idr, id); + goto unlock; + } + } + shrinker->id = id; + ret = 0; +unlock: + up_write(&shrinker_rwsem); + return ret; +} + +static void unregister_memcg_shrinker(struct shrinker *shrinker) +{ + int id = shrinker->id; + + BUG_ON(id < 0); + + lockdep_assert_held(&shrinker_rwsem); + + idr_remove(&shrinker_idr, id); +} + +static long xchg_nr_deferred_memcg(int nid, struct shrinker *shrinker, + struct mem_cgroup *memcg) +{ + struct shrinker_info *info; + + info = shrinker_info_protected(memcg, nid); + return atomic_long_xchg(&info->nr_deferred[shrinker->id], 0); +} + +static long add_nr_deferred_memcg(long nr, int nid, struct shrinker *shrinker, + struct mem_cgroup *memcg) +{ + struct shrinker_info *info; + + info = shrinker_info_protected(memcg, nid); + return atomic_long_add_return(nr, &info->nr_deferred[shrinker->id]); +} + +void reparent_shrinker_deferred(struct mem_cgroup *memcg) +{ + int i, nid; + long nr; + struct mem_cgroup *parent; + struct shrinker_info *child_info, *parent_info; + + parent = parent_mem_cgroup(memcg); + if (!parent) + parent = root_mem_cgroup; + + /* Prevent from concurrent shrinker_info expand */ + down_read(&shrinker_rwsem); + for_each_node(nid) { + child_info = shrinker_info_protected(memcg, nid); + parent_info = shrinker_info_protected(parent, nid); + for (i = 0; i < child_info->map_nr_max; i++) { + nr = atomic_long_read(&child_info->nr_deferred[i]); + atomic_long_add(nr, &parent_info->nr_deferred[i]); + } + } + up_read(&shrinker_rwsem); +} +#else +static int prealloc_memcg_shrinker(struct shrinker *shrinker) +{ + return -ENOSYS; +} + +static void unregister_memcg_shrinker(struct shrinker *shrinker) +{ +} + +static long xchg_nr_deferred_memcg(int nid, struct shrinker *shrinker, + struct mem_cgroup *memcg) +{ + return 0; +} + +static long add_nr_deferred_memcg(long nr, int nid, struct shrinker *shrinker, + struct mem_cgroup *memcg) +{ + return 0; +} +#endif /* CONFIG_MEMCG */ + +static long xchg_nr_deferred(struct shrinker *shrinker, + struct shrink_control *sc) +{ + int nid = sc->nid; + + if (!(shrinker->flags & SHRINKER_NUMA_AWARE)) + nid = 0; + + if (sc->memcg && + (shrinker->flags & SHRINKER_MEMCG_AWARE)) + return xchg_nr_deferred_memcg(nid, shrinker, + sc->memcg); + + return atomic_long_xchg(&shrinker->nr_deferred[nid], 0); +} + + +static long add_nr_deferred(long nr, struct shrinker *shrinker, + struct shrink_control *sc) +{ + int nid = sc->nid; + + if (!(shrinker->flags & SHRINKER_NUMA_AWARE)) + nid = 0; + + if (sc->memcg && + (shrinker->flags & SHRINKER_MEMCG_AWARE)) + return add_nr_deferred_memcg(nr, nid, shrinker, + sc->memcg); + + return atomic_long_add_return(nr, &shrinker->nr_deferred[nid]); +} + +#define SHRINK_BATCH 128 + +static unsigned long do_shrink_slab(struct shrink_control *shrinkctl, + struct shrinker *shrinker, int priority) +{ + unsigned long freed = 0; + unsigned long long delta; + long total_scan; + long freeable; + long nr; + long new_nr; + long batch_size = shrinker->batch ? shrinker->batch + : SHRINK_BATCH; + long scanned = 0, next_deferred; + + freeable = shrinker->count_objects(shrinker, shrinkctl); + if (freeable == 0 || freeable == SHRINK_EMPTY) + return freeable; + + /* + * copy the current shrinker scan count into a local variable + * and zero it so that other concurrent shrinker invocations + * don't also do this scanning work. + */ + nr = xchg_nr_deferred(shrinker, shrinkctl); + + if (shrinker->seeks) { + delta = freeable >> priority; + delta *= 4; + do_div(delta, shrinker->seeks); + } else { + /* + * These objects don't require any IO to create. Trim + * them aggressively under memory pressure to keep + * them from causing refetches in the IO caches. + */ + delta = freeable / 2; + } + + total_scan = nr >> priority; + total_scan += delta; + total_scan = min(total_scan, (2 * freeable)); + + trace_mm_shrink_slab_start(shrinker, shrinkctl, nr, + freeable, delta, total_scan, priority); + + /* + * Normally, we should not scan less than batch_size objects in one + * pass to avoid too frequent shrinker calls, but if the slab has less + * than batch_size objects in total and we are really tight on memory, + * we will try to reclaim all available objects, otherwise we can end + * up failing allocations although there are plenty of reclaimable + * objects spread over several slabs with usage less than the + * batch_size. + * + * We detect the "tight on memory" situations by looking at the total + * number of objects we want to scan (total_scan). If it is greater + * than the total number of objects on slab (freeable), we must be + * scanning at high prio and therefore should try to reclaim as much as + * possible. + */ + while (total_scan >= batch_size || + total_scan >= freeable) { + unsigned long ret; + unsigned long nr_to_scan = min(batch_size, total_scan); + + shrinkctl->nr_to_scan = nr_to_scan; + shrinkctl->nr_scanned = nr_to_scan; + ret = shrinker->scan_objects(shrinker, shrinkctl); + if (ret == SHRINK_STOP) + break; + freed += ret; + + count_vm_events(SLABS_SCANNED, shrinkctl->nr_scanned); + total_scan -= shrinkctl->nr_scanned; + scanned += shrinkctl->nr_scanned; + + cond_resched(); + } + + /* + * The deferred work is increased by any new work (delta) that wasn't + * done, decreased by old deferred work that was done now. + * + * And it is capped to two times of the freeable items. + */ + next_deferred = max_t(long, (nr + delta - scanned), 0); + next_deferred = min(next_deferred, (2 * freeable)); + + /* + * move the unused scan count back into the shrinker in a + * manner that handles concurrent updates. + */ + new_nr = add_nr_deferred(next_deferred, shrinker, shrinkctl); + + trace_mm_shrink_slab_end(shrinker, shrinkctl->nid, freed, nr, new_nr, total_scan); + return freed; +} + +#ifdef CONFIG_MEMCG +static unsigned long shrink_slab_memcg(gfp_t gfp_mask, int nid, + struct mem_cgroup *memcg, int priority) +{ + struct shrinker_info *info; + unsigned long ret, freed = 0; + int i; + + if (!mem_cgroup_online(memcg)) + return 0; + + if (!down_read_trylock(&shrinker_rwsem)) + return 0; + + info = shrinker_info_protected(memcg, nid); + if (unlikely(!info)) + goto unlock; + + for_each_set_bit(i, info->map, info->map_nr_max) { + struct shrink_control sc = { + .gfp_mask = gfp_mask, + .nid = nid, + .memcg = memcg, + }; + struct shrinker *shrinker; + + shrinker = idr_find(&shrinker_idr, i); + if (unlikely(!shrinker || !(shrinker->flags & SHRINKER_REGISTERED))) { + if (!shrinker) + clear_bit(i, info->map); + continue; + } + + /* Call non-slab shrinkers even though kmem is disabled */ + if (!memcg_kmem_online() && + !(shrinker->flags & SHRINKER_NONSLAB)) + continue; + + ret = do_shrink_slab(&sc, shrinker, priority); + if (ret == SHRINK_EMPTY) { + clear_bit(i, info->map); + /* + * After the shrinker reported that it had no objects to + * free, but before we cleared the corresponding bit in + * the memcg shrinker map, a new object might have been + * added. To make sure, we have the bit set in this + * case, we invoke the shrinker one more time and reset + * the bit if it reports that it is not empty anymore. + * The memory barrier here pairs with the barrier in + * set_shrinker_bit(): + * + * list_lru_add() shrink_slab_memcg() + * list_add_tail() clear_bit() + * + * set_bit() do_shrink_slab() + */ + smp_mb__after_atomic(); + ret = do_shrink_slab(&sc, shrinker, priority); + if (ret == SHRINK_EMPTY) + ret = 0; + else + set_shrinker_bit(memcg, nid, i); + } + freed += ret; + + if (rwsem_is_contended(&shrinker_rwsem)) { + freed = freed ? : 1; + break; + } + } +unlock: + up_read(&shrinker_rwsem); + return freed; +} +#else /* !CONFIG_MEMCG */ +static unsigned long shrink_slab_memcg(gfp_t gfp_mask, int nid, + struct mem_cgroup *memcg, int priority) +{ + return 0; +} +#endif /* CONFIG_MEMCG */ + +/** + * shrink_slab - shrink slab caches + * @gfp_mask: allocation context + * @nid: node whose slab caches to target + * @memcg: memory cgroup whose slab caches to target + * @priority: the reclaim priority + * + * Call the shrink functions to age shrinkable caches. + * + * @nid is passed along to shrinkers with SHRINKER_NUMA_AWARE set, + * unaware shrinkers will receive a node id of 0 instead. + * + * @memcg specifies the memory cgroup to target. Unaware shrinkers + * are called only if it is the root cgroup. + * + * @priority is sc->priority, we take the number of objects and >> by priority + * in order to get the scan target. + * + * Returns the number of reclaimed slab objects. + */ +unsigned long shrink_slab(gfp_t gfp_mask, int nid, struct mem_cgroup *memcg, + int priority) +{ + unsigned long ret, freed = 0; + struct shrinker *shrinker; + + /* + * The root memcg might be allocated even though memcg is disabled + * via "cgroup_disable=memory" boot parameter. This could make + * mem_cgroup_is_root() return false, then just run memcg slab + * shrink, but skip global shrink. This may result in premature + * oom. + */ + if (!mem_cgroup_disabled() && !mem_cgroup_is_root(memcg)) + return shrink_slab_memcg(gfp_mask, nid, memcg, priority); + + if (!down_read_trylock(&shrinker_rwsem)) + goto out; + + list_for_each_entry(shrinker, &shrinker_list, list) { + struct shrink_control sc = { + .gfp_mask = gfp_mask, + .nid = nid, + .memcg = memcg, + }; + + ret = do_shrink_slab(&sc, shrinker, priority); + if (ret == SHRINK_EMPTY) + ret = 0; + freed += ret; + /* + * Bail out if someone want to register a new shrinker to + * prevent the registration from being stalled for long periods + * by parallel ongoing shrinking. + */ + if (rwsem_is_contended(&shrinker_rwsem)) { + freed = freed ? : 1; + break; + } + } + + up_read(&shrinker_rwsem); +out: + cond_resched(); + return freed; +} + +/* + * Add a shrinker callback to be called from the vm. + */ +static int __prealloc_shrinker(struct shrinker *shrinker) +{ + unsigned int size; + int err; + + if (shrinker->flags & SHRINKER_MEMCG_AWARE) { + err = prealloc_memcg_shrinker(shrinker); + if (err != -ENOSYS) + return err; + + shrinker->flags &= ~SHRINKER_MEMCG_AWARE; + } + + size = sizeof(*shrinker->nr_deferred); + if (shrinker->flags & SHRINKER_NUMA_AWARE) + size *= nr_node_ids; + + shrinker->nr_deferred = kzalloc(size, GFP_KERNEL); + if (!shrinker->nr_deferred) + return -ENOMEM; + + return 0; +} + +#ifdef CONFIG_SHRINKER_DEBUG +int prealloc_shrinker(struct shrinker *shrinker, const char *fmt, ...) +{ + va_list ap; + int err; + + va_start(ap, fmt); + shrinker->name = kvasprintf_const(GFP_KERNEL, fmt, ap); + va_end(ap); + if (!shrinker->name) + return -ENOMEM; + + err = __prealloc_shrinker(shrinker); + if (err) { + kfree_const(shrinker->name); + shrinker->name = NULL; + } + + return err; +} +#else +int prealloc_shrinker(struct shrinker *shrinker, const char *fmt, ...) +{ + return __prealloc_shrinker(shrinker); +} +#endif + +void free_prealloced_shrinker(struct shrinker *shrinker) +{ +#ifdef CONFIG_SHRINKER_DEBUG + kfree_const(shrinker->name); + shrinker->name = NULL; +#endif + if (shrinker->flags & SHRINKER_MEMCG_AWARE) { + down_write(&shrinker_rwsem); + unregister_memcg_shrinker(shrinker); + up_write(&shrinker_rwsem); + return; + } + + kfree(shrinker->nr_deferred); + shrinker->nr_deferred = NULL; +} + +void register_shrinker_prepared(struct shrinker *shrinker) +{ + down_write(&shrinker_rwsem); + list_add_tail(&shrinker->list, &shrinker_list); + shrinker->flags |= SHRINKER_REGISTERED; + shrinker_debugfs_add(shrinker); + up_write(&shrinker_rwsem); +} + +static int __register_shrinker(struct shrinker *shrinker) +{ + int err = __prealloc_shrinker(shrinker); + + if (err) + return err; + register_shrinker_prepared(shrinker); + return 0; +} + +#ifdef CONFIG_SHRINKER_DEBUG +int register_shrinker(struct shrinker *shrinker, const char *fmt, ...) +{ + va_list ap; + int err; + + va_start(ap, fmt); + shrinker->name = kvasprintf_const(GFP_KERNEL, fmt, ap); + va_end(ap); + if (!shrinker->name) + return -ENOMEM; + + err = __register_shrinker(shrinker); + if (err) { + kfree_const(shrinker->name); + shrinker->name = NULL; + } + return err; +} +#else +int register_shrinker(struct shrinker *shrinker, const char *fmt, ...) +{ + return __register_shrinker(shrinker); +} +#endif +EXPORT_SYMBOL(register_shrinker); + +/* + * Remove one + */ +void unregister_shrinker(struct shrinker *shrinker) +{ + struct dentry *debugfs_entry; + int debugfs_id; + + if (!(shrinker->flags & SHRINKER_REGISTERED)) + return; + + down_write(&shrinker_rwsem); + list_del(&shrinker->list); + shrinker->flags &= ~SHRINKER_REGISTERED; + if (shrinker->flags & SHRINKER_MEMCG_AWARE) + unregister_memcg_shrinker(shrinker); + debugfs_entry = shrinker_debugfs_detach(shrinker, &debugfs_id); + up_write(&shrinker_rwsem); + + shrinker_debugfs_remove(debugfs_entry, debugfs_id); + + kfree(shrinker->nr_deferred); + shrinker->nr_deferred = NULL; +} +EXPORT_SYMBOL(unregister_shrinker); + +/** + * synchronize_shrinkers - Wait for all running shrinkers to complete. + * + * This is equivalent to calling unregister_shrink() and register_shrinker(), + * but atomically and with less overhead. This is useful to guarantee that all + * shrinker invocations have seen an update, before freeing memory, similar to + * rcu. + */ +void synchronize_shrinkers(void) +{ + down_write(&shrinker_rwsem); + up_write(&shrinker_rwsem); +} +EXPORT_SYMBOL(synchronize_shrinkers); diff --git a/mm/vmscan.c b/mm/vmscan.c index 4039620d30fe..07bc58af6f26 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -35,7 +35,6 @@ #include #include #include -#include #include #include #include @@ -188,246 +187,7 @@ struct scan_control { */ int vm_swappiness = 60; -LIST_HEAD(shrinker_list); -DECLARE_RWSEM(shrinker_rwsem); - #ifdef CONFIG_MEMCG -static int shrinker_nr_max; - -/* The shrinker_info is expanded in a batch of BITS_PER_LONG */ -static inline int shrinker_map_size(int nr_items) -{ - return (DIV_ROUND_UP(nr_items, BITS_PER_LONG) * sizeof(unsigned long)); -} - -static inline int shrinker_defer_size(int nr_items) -{ - return (round_up(nr_items, BITS_PER_LONG) * sizeof(atomic_long_t)); -} - -static struct shrinker_info *shrinker_info_protected(struct mem_cgroup *memcg, - int nid) -{ - return rcu_dereference_protected(memcg->nodeinfo[nid]->shrinker_info, - lockdep_is_held(&shrinker_rwsem)); -} - -static int expand_one_shrinker_info(struct mem_cgroup *memcg, - int map_size, int defer_size, - int old_map_size, int old_defer_size, - int new_nr_max) -{ - struct shrinker_info *new, *old; - struct mem_cgroup_per_node *pn; - int nid; - int size = map_size + defer_size; - - for_each_node(nid) { - pn = memcg->nodeinfo[nid]; - old = shrinker_info_protected(memcg, nid); - /* Not yet online memcg */ - if (!old) - return 0; - - /* Already expanded this shrinker_info */ - if (new_nr_max <= old->map_nr_max) - continue; - - new = kvmalloc_node(sizeof(*new) + size, GFP_KERNEL, nid); - if (!new) - return -ENOMEM; - - new->nr_deferred = (atomic_long_t *)(new + 1); - new->map = (void *)new->nr_deferred + defer_size; - new->map_nr_max = new_nr_max; - - /* map: set all old bits, clear all new bits */ - memset(new->map, (int)0xff, old_map_size); - memset((void *)new->map + old_map_size, 0, map_size - old_map_size); - /* nr_deferred: copy old values, clear all new values */ - memcpy(new->nr_deferred, old->nr_deferred, old_defer_size); - memset((void *)new->nr_deferred + old_defer_size, 0, - defer_size - old_defer_size); - - rcu_assign_pointer(pn->shrinker_info, new); - kvfree_rcu(old, rcu); - } - - return 0; -} - -void free_shrinker_info(struct mem_cgroup *memcg) -{ - struct mem_cgroup_per_node *pn; - struct shrinker_info *info; - int nid; - - for_each_node(nid) { - pn = memcg->nodeinfo[nid]; - info = rcu_dereference_protected(pn->shrinker_info, true); - kvfree(info); - rcu_assign_pointer(pn->shrinker_info, NULL); - } -} - -int alloc_shrinker_info(struct mem_cgroup *memcg) -{ - struct shrinker_info *info; - int nid, size, ret = 0; - int map_size, defer_size = 0; - - down_write(&shrinker_rwsem); - map_size = shrinker_map_size(shrinker_nr_max); - defer_size = shrinker_defer_size(shrinker_nr_max); - size = map_size + defer_size; - for_each_node(nid) { - info = kvzalloc_node(sizeof(*info) + size, GFP_KERNEL, nid); - if (!info) { - free_shrinker_info(memcg); - ret = -ENOMEM; - break; - } - info->nr_deferred = (atomic_long_t *)(info + 1); - info->map = (void *)info->nr_deferred + defer_size; - info->map_nr_max = shrinker_nr_max; - rcu_assign_pointer(memcg->nodeinfo[nid]->shrinker_info, info); - } - up_write(&shrinker_rwsem); - - return ret; -} - -static int expand_shrinker_info(int new_id) -{ - int ret = 0; - int new_nr_max = round_up(new_id + 1, BITS_PER_LONG); - int map_size, defer_size = 0; - int old_map_size, old_defer_size = 0; - struct mem_cgroup *memcg; - - if (!root_mem_cgroup) - goto out; - - lockdep_assert_held(&shrinker_rwsem); - - map_size = shrinker_map_size(new_nr_max); - defer_size = shrinker_defer_size(new_nr_max); - old_map_size = shrinker_map_size(shrinker_nr_max); - old_defer_size = shrinker_defer_size(shrinker_nr_max); - - memcg = mem_cgroup_iter(NULL, NULL, NULL); - do { - ret = expand_one_shrinker_info(memcg, map_size, defer_size, - old_map_size, old_defer_size, - new_nr_max); - if (ret) { - mem_cgroup_iter_break(NULL, memcg); - goto out; - } - } while ((memcg = mem_cgroup_iter(NULL, memcg, NULL)) != NULL); -out: - if (!ret) - shrinker_nr_max = new_nr_max; - - return ret; -} - -void set_shrinker_bit(struct mem_cgroup *memcg, int nid, int shrinker_id) -{ - if (shrinker_id >= 0 && memcg && !mem_cgroup_is_root(memcg)) { - struct shrinker_info *info; - - rcu_read_lock(); - info = rcu_dereference(memcg->nodeinfo[nid]->shrinker_info); - if (!WARN_ON_ONCE(shrinker_id >= info->map_nr_max)) { - /* Pairs with smp mb in shrink_slab() */ - smp_mb__before_atomic(); - set_bit(shrinker_id, info->map); - } - rcu_read_unlock(); - } -} - -static DEFINE_IDR(shrinker_idr); - -static int prealloc_memcg_shrinker(struct shrinker *shrinker) -{ - int id, ret = -ENOMEM; - - if (mem_cgroup_disabled()) - return -ENOSYS; - - down_write(&shrinker_rwsem); - /* This may call shrinker, so it must use down_read_trylock() */ - id = idr_alloc(&shrinker_idr, shrinker, 0, 0, GFP_KERNEL); - if (id < 0) - goto unlock; - - if (id >= shrinker_nr_max) { - if (expand_shrinker_info(id)) { - idr_remove(&shrinker_idr, id); - goto unlock; - } - } - shrinker->id = id; - ret = 0; -unlock: - up_write(&shrinker_rwsem); - return ret; -} - -static void unregister_memcg_shrinker(struct shrinker *shrinker) -{ - int id = shrinker->id; - - BUG_ON(id < 0); - - lockdep_assert_held(&shrinker_rwsem); - - idr_remove(&shrinker_idr, id); -} - -static long xchg_nr_deferred_memcg(int nid, struct shrinker *shrinker, - struct mem_cgroup *memcg) -{ - struct shrinker_info *info; - - info = shrinker_info_protected(memcg, nid); - return atomic_long_xchg(&info->nr_deferred[shrinker->id], 0); -} - -static long add_nr_deferred_memcg(long nr, int nid, struct shrinker *shrinker, - struct mem_cgroup *memcg) -{ - struct shrinker_info *info; - - info = shrinker_info_protected(memcg, nid); - return atomic_long_add_return(nr, &info->nr_deferred[shrinker->id]); -} - -void reparent_shrinker_deferred(struct mem_cgroup *memcg) -{ - int i, nid; - long nr; - struct mem_cgroup *parent; - struct shrinker_info *child_info, *parent_info; - - parent = parent_mem_cgroup(memcg); - if (!parent) - parent = root_mem_cgroup; - - /* Prevent from concurrent shrinker_info expand */ - down_read(&shrinker_rwsem); - for_each_node(nid) { - child_info = shrinker_info_protected(memcg, nid); - parent_info = shrinker_info_protected(parent, nid); - for (i = 0; i < child_info->map_nr_max; i++) { - nr = atomic_long_read(&child_info->nr_deferred[i]); - atomic_long_add(nr, &parent_info->nr_deferred[i]); - } - } - up_read(&shrinker_rwsem); -} /* Returns true for reclaim through cgroup limits or cgroup interfaces. */ static bool cgroup_reclaim(struct scan_control *sc) @@ -468,27 +228,6 @@ static bool writeback_throttling_sane(struct scan_control *sc) return false; } #else -static int prealloc_memcg_shrinker(struct shrinker *shrinker) -{ - return -ENOSYS; -} - -static void unregister_memcg_shrinker(struct shrinker *shrinker) -{ -} - -static long xchg_nr_deferred_memcg(int nid, struct shrinker *shrinker, - struct mem_cgroup *memcg) -{ - return 0; -} - -static long add_nr_deferred_memcg(long nr, int nid, struct shrinker *shrinker, - struct mem_cgroup *memcg) -{ - return 0; -} - static bool cgroup_reclaim(struct scan_control *sc) { return false; @@ -557,39 +296,6 @@ static void flush_reclaim_state(struct scan_control *sc) } } -static long xchg_nr_deferred(struct shrinker *shrinker, - struct shrink_control *sc) -{ - int nid = sc->nid; - - if (!(shrinker->flags & SHRINKER_NUMA_AWARE)) - nid = 0; - - if (sc->memcg && - (shrinker->flags & SHRINKER_MEMCG_AWARE)) - return xchg_nr_deferred_memcg(nid, shrinker, - sc->memcg); - - return atomic_long_xchg(&shrinker->nr_deferred[nid], 0); -} - - -static long add_nr_deferred(long nr, struct shrinker *shrinker, - struct shrink_control *sc) -{ - int nid = sc->nid; - - if (!(shrinker->flags & SHRINKER_NUMA_AWARE)) - nid = 0; - - if (sc->memcg && - (shrinker->flags & SHRINKER_MEMCG_AWARE)) - return add_nr_deferred_memcg(nr, nid, shrinker, - sc->memcg); - - return atomic_long_add_return(nr, &shrinker->nr_deferred[nid]); -} - static bool can_demote(int nid, struct scan_control *sc) { if (!numa_demotion_enabled) @@ -671,413 +377,6 @@ static unsigned long lruvec_lru_size(struct lruvec *lruvec, enum lru_list lru, return size; } -/* - * Add a shrinker callback to be called from the vm. - */ -static int __prealloc_shrinker(struct shrinker *shrinker) -{ - unsigned int size; - int err; - - if (shrinker->flags & SHRINKER_MEMCG_AWARE) { - err = prealloc_memcg_shrinker(shrinker); - if (err != -ENOSYS) - return err; - - shrinker->flags &= ~SHRINKER_MEMCG_AWARE; - } - - size = sizeof(*shrinker->nr_deferred); - if (shrinker->flags & SHRINKER_NUMA_AWARE) - size *= nr_node_ids; - - shrinker->nr_deferred = kzalloc(size, GFP_KERNEL); - if (!shrinker->nr_deferred) - return -ENOMEM; - - return 0; -} - -#ifdef CONFIG_SHRINKER_DEBUG -int prealloc_shrinker(struct shrinker *shrinker, const char *fmt, ...) -{ - va_list ap; - int err; - - va_start(ap, fmt); - shrinker->name = kvasprintf_const(GFP_KERNEL, fmt, ap); - va_end(ap); - if (!shrinker->name) - return -ENOMEM; - - err = __prealloc_shrinker(shrinker); - if (err) { - kfree_const(shrinker->name); - shrinker->name = NULL; - } - - return err; -} -#else -int prealloc_shrinker(struct shrinker *shrinker, const char *fmt, ...) -{ - return __prealloc_shrinker(shrinker); -} -#endif - -void free_prealloced_shrinker(struct shrinker *shrinker) -{ -#ifdef CONFIG_SHRINKER_DEBUG - kfree_const(shrinker->name); - shrinker->name = NULL; -#endif - if (shrinker->flags & SHRINKER_MEMCG_AWARE) { - down_write(&shrinker_rwsem); - unregister_memcg_shrinker(shrinker); - up_write(&shrinker_rwsem); - return; - } - - kfree(shrinker->nr_deferred); - shrinker->nr_deferred = NULL; -} - -void register_shrinker_prepared(struct shrinker *shrinker) -{ - down_write(&shrinker_rwsem); - list_add_tail(&shrinker->list, &shrinker_list); - shrinker->flags |= SHRINKER_REGISTERED; - shrinker_debugfs_add(shrinker); - up_write(&shrinker_rwsem); -} - -static int __register_shrinker(struct shrinker *shrinker) -{ - int err = __prealloc_shrinker(shrinker); - - if (err) - return err; - register_shrinker_prepared(shrinker); - return 0; -} - -#ifdef CONFIG_SHRINKER_DEBUG -int register_shrinker(struct shrinker *shrinker, const char *fmt, ...) -{ - va_list ap; - int err; - - va_start(ap, fmt); - shrinker->name = kvasprintf_const(GFP_KERNEL, fmt, ap); - va_end(ap); - if (!shrinker->name) - return -ENOMEM; - - err = __register_shrinker(shrinker); - if (err) { - kfree_const(shrinker->name); - shrinker->name = NULL; - } - return err; -} -#else -int register_shrinker(struct shrinker *shrinker, const char *fmt, ...) -{ - return __register_shrinker(shrinker); -} -#endif -EXPORT_SYMBOL(register_shrinker); - -/* - * Remove one - */ -void unregister_shrinker(struct shrinker *shrinker) -{ - struct dentry *debugfs_entry; - int debugfs_id; - - if (!(shrinker->flags & SHRINKER_REGISTERED)) - return; - - down_write(&shrinker_rwsem); - list_del(&shrinker->list); - shrinker->flags &= ~SHRINKER_REGISTERED; - if (shrinker->flags & SHRINKER_MEMCG_AWARE) - unregister_memcg_shrinker(shrinker); - debugfs_entry = shrinker_debugfs_detach(shrinker, &debugfs_id); - up_write(&shrinker_rwsem); - - shrinker_debugfs_remove(debugfs_entry, debugfs_id); - - kfree(shrinker->nr_deferred); - shrinker->nr_deferred = NULL; -} -EXPORT_SYMBOL(unregister_shrinker); - -/** - * synchronize_shrinkers - Wait for all running shrinkers to complete. - * - * This is equivalent to calling unregister_shrink() and register_shrinker(), - * but atomically and with less overhead. This is useful to guarantee that all - * shrinker invocations have seen an update, before freeing memory, similar to - * rcu. - */ -void synchronize_shrinkers(void) -{ - down_write(&shrinker_rwsem); - up_write(&shrinker_rwsem); -} -EXPORT_SYMBOL(synchronize_shrinkers); - -#define SHRINK_BATCH 128 - -static unsigned long do_shrink_slab(struct shrink_control *shrinkctl, - struct shrinker *shrinker, int priority) -{ - unsigned long freed = 0; - unsigned long long delta; - long total_scan; - long freeable; - long nr; - long new_nr; - long batch_size = shrinker->batch ? shrinker->batch - : SHRINK_BATCH; - long scanned = 0, next_deferred; - - freeable = shrinker->count_objects(shrinker, shrinkctl); - if (freeable == 0 || freeable == SHRINK_EMPTY) - return freeable; - - /* - * copy the current shrinker scan count into a local variable - * and zero it so that other concurrent shrinker invocations - * don't also do this scanning work. - */ - nr = xchg_nr_deferred(shrinker, shrinkctl); - - if (shrinker->seeks) { - delta = freeable >> priority; - delta *= 4; - do_div(delta, shrinker->seeks); - } else { - /* - * These objects don't require any IO to create. Trim - * them aggressively under memory pressure to keep - * them from causing refetches in the IO caches. - */ - delta = freeable / 2; - } - - total_scan = nr >> priority; - total_scan += delta; - total_scan = min(total_scan, (2 * freeable)); - - trace_mm_shrink_slab_start(shrinker, shrinkctl, nr, - freeable, delta, total_scan, priority); - - /* - * Normally, we should not scan less than batch_size objects in one - * pass to avoid too frequent shrinker calls, but if the slab has less - * than batch_size objects in total and we are really tight on memory, - * we will try to reclaim all available objects, otherwise we can end - * up failing allocations although there are plenty of reclaimable - * objects spread over several slabs with usage less than the - * batch_size. - * - * We detect the "tight on memory" situations by looking at the total - * number of objects we want to scan (total_scan). If it is greater - * than the total number of objects on slab (freeable), we must be - * scanning at high prio and therefore should try to reclaim as much as - * possible. - */ - while (total_scan >= batch_size || - total_scan >= freeable) { - unsigned long ret; - unsigned long nr_to_scan = min(batch_size, total_scan); - - shrinkctl->nr_to_scan = nr_to_scan; - shrinkctl->nr_scanned = nr_to_scan; - ret = shrinker->scan_objects(shrinker, shrinkctl); - if (ret == SHRINK_STOP) - break; - freed += ret; - - count_vm_events(SLABS_SCANNED, shrinkctl->nr_scanned); - total_scan -= shrinkctl->nr_scanned; - scanned += shrinkctl->nr_scanned; - - cond_resched(); - } - - /* - * The deferred work is increased by any new work (delta) that wasn't - * done, decreased by old deferred work that was done now. - * - * And it is capped to two times of the freeable items. - */ - next_deferred = max_t(long, (nr + delta - scanned), 0); - next_deferred = min(next_deferred, (2 * freeable)); - - /* - * move the unused scan count back into the shrinker in a - * manner that handles concurrent updates. - */ - new_nr = add_nr_deferred(next_deferred, shrinker, shrinkctl); - - trace_mm_shrink_slab_end(shrinker, shrinkctl->nid, freed, nr, new_nr, total_scan); - return freed; -} - -#ifdef CONFIG_MEMCG -static unsigned long shrink_slab_memcg(gfp_t gfp_mask, int nid, - struct mem_cgroup *memcg, int priority) -{ - struct shrinker_info *info; - unsigned long ret, freed = 0; - int i; - - if (!mem_cgroup_online(memcg)) - return 0; - - if (!down_read_trylock(&shrinker_rwsem)) - return 0; - - info = shrinker_info_protected(memcg, nid); - if (unlikely(!info)) - goto unlock; - - for_each_set_bit(i, info->map, info->map_nr_max) { - struct shrink_control sc = { - .gfp_mask = gfp_mask, - .nid = nid, - .memcg = memcg, - }; - struct shrinker *shrinker; - - shrinker = idr_find(&shrinker_idr, i); - if (unlikely(!shrinker || !(shrinker->flags & SHRINKER_REGISTERED))) { - if (!shrinker) - clear_bit(i, info->map); - continue; - } - - /* Call non-slab shrinkers even though kmem is disabled */ - if (!memcg_kmem_online() && - !(shrinker->flags & SHRINKER_NONSLAB)) - continue; - - ret = do_shrink_slab(&sc, shrinker, priority); - if (ret == SHRINK_EMPTY) { - clear_bit(i, info->map); - /* - * After the shrinker reported that it had no objects to - * free, but before we cleared the corresponding bit in - * the memcg shrinker map, a new object might have been - * added. To make sure, we have the bit set in this - * case, we invoke the shrinker one more time and reset - * the bit if it reports that it is not empty anymore. - * The memory barrier here pairs with the barrier in - * set_shrinker_bit(): - * - * list_lru_add() shrink_slab_memcg() - * list_add_tail() clear_bit() - * - * set_bit() do_shrink_slab() - */ - smp_mb__after_atomic(); - ret = do_shrink_slab(&sc, shrinker, priority); - if (ret == SHRINK_EMPTY) - ret = 0; - else - set_shrinker_bit(memcg, nid, i); - } - freed += ret; - - if (rwsem_is_contended(&shrinker_rwsem)) { - freed = freed ? : 1; - break; - } - } -unlock: - up_read(&shrinker_rwsem); - return freed; -} -#else /* CONFIG_MEMCG */ -static unsigned long shrink_slab_memcg(gfp_t gfp_mask, int nid, - struct mem_cgroup *memcg, int priority) -{ - return 0; -} -#endif /* CONFIG_MEMCG */ - -/** - * shrink_slab - shrink slab caches - * @gfp_mask: allocation context - * @nid: node whose slab caches to target - * @memcg: memory cgroup whose slab caches to target - * @priority: the reclaim priority - * - * Call the shrink functions to age shrinkable caches. - * - * @nid is passed along to shrinkers with SHRINKER_NUMA_AWARE set, - * unaware shrinkers will receive a node id of 0 instead. - * - * @memcg specifies the memory cgroup to target. Unaware shrinkers - * are called only if it is the root cgroup. - * - * @priority is sc->priority, we take the number of objects and >> by priority - * in order to get the scan target. - * - * Returns the number of reclaimed slab objects. - */ -static unsigned long shrink_slab(gfp_t gfp_mask, int nid, - struct mem_cgroup *memcg, - int priority) -{ - unsigned long ret, freed = 0; - struct shrinker *shrinker; - - /* - * The root memcg might be allocated even though memcg is disabled - * via "cgroup_disable=memory" boot parameter. This could make - * mem_cgroup_is_root() return false, then just run memcg slab - * shrink, but skip global shrink. This may result in premature - * oom. - */ - if (!mem_cgroup_disabled() && !mem_cgroup_is_root(memcg)) - return shrink_slab_memcg(gfp_mask, nid, memcg, priority); - - if (!down_read_trylock(&shrinker_rwsem)) - goto out; - - list_for_each_entry(shrinker, &shrinker_list, list) { - struct shrink_control sc = { - .gfp_mask = gfp_mask, - .nid = nid, - .memcg = memcg, - }; - - ret = do_shrink_slab(&sc, shrinker, priority); - if (ret == SHRINK_EMPTY) - ret = 0; - freed += ret; - /* - * Bail out if someone want to register a new shrinker to - * prevent the registration from being stalled for long periods - * by parallel ongoing shrinking. - */ - if (rwsem_is_contended(&shrinker_rwsem)) { - freed = freed ? : 1; - break; - } - } - - up_read(&shrinker_rwsem); -out: - cond_resched(); - return freed; -} - static unsigned long drop_slab_node(int nid) { unsigned long freed = 0; From patchwork Thu Jul 27 08:04:17 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329281 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 50824C8F4 for ; Thu, 27 Jul 2023 08:08:15 +0000 (UTC) Received: from mail-pf1-x42f.google.com (mail-pf1-x42f.google.com [IPv6:2607:f8b0:4864:20::42f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3608C3585 for ; Thu, 27 Jul 2023 01:07:52 -0700 (PDT) Received: by mail-pf1-x42f.google.com with SMTP id d2e1a72fcca58-6748a616e17so182342b3a.1 for ; Thu, 27 Jul 2023 01:07:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445196; x=1691049996; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=5ddhCZTkz2TFo7oGCFzg4uU7nrLecafIDKLLill2eh8=; b=EEgKRQyP19rDGzyMkxrAyrND65/av9N1ZEpraFKdjf5iHd/PgC9Uhy/xnwzeo3ff8l m3TJD5UzpvFEDeBzcRtJtOD/qHmmEUSLFJuussVMd7PAkAK7iQKGftfC2f44nNeUEfJr mKle0CkHpRLYz5sWKpGW6Zb4t5WjMo/pANabwTgogYiGmsOD2+fKJGiw7ZJ36fC4jq2K 1KqECLKCfE0K//MR+hlNLb+3ZgY7viYlU4DaknQaSi+VFe2dV+fDBnzCaNkdmNFv1cVa f6nuMbduVm+LsREYRbVVclCckYchB0Qi+6OZAWegvIeaDdeHomKe1HhIBSolAxF7uDUX dSVQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445196; x=1691049996; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=5ddhCZTkz2TFo7oGCFzg4uU7nrLecafIDKLLill2eh8=; b=W9Wobn88xGndnd+HN4UbYKtkJ7ufK8Jjc3Q2NStoeFfugvIL+ly7tfjeCQCO+HKUmL uBScxoCejXnRpzXWyhFMk5b4rvsrLnf42mUDVDd67YuhzUJoSVsTwqb1VKOIvyDFUkjV kloooiX42y2VJHgGEXLDIZX0Ih1n4Uq5ljKTKDvU53TUcfJIqAPsiqb/+72nxOyeCMBC R1W1+dhdZphYVMa4l55/beyT0+zU6ofr4B1NDCzMjJBsPIob9p70mP+9+M2W6sENtnjU GrQwGNowPPGm1YPobPYbBF8KJln16xaDv1ygLBKC/a4cSGPqyMYkv4jW2j2U1LZlLg3I fJ2Q== X-Gm-Message-State: ABy/qLZkALIuqusNi5AFOysY+6iCEN1G2i6S6X76ldT869qnts9PqKab 9Z+OEf3pbw92XGzFcTj914OaWA== X-Google-Smtp-Source: APBJJlGC9GcjpF//RTfgHk/e3ibfMuX5WCzda5QO/QIZ+yDcAz1vV0DX9dFwhd70yzWPOAQ384luFQ== X-Received: by 2002:a05:6a21:6da1:b0:134:1671:6191 with SMTP id wl33-20020a056a216da100b0013416716191mr5882289pzb.0.1690445196605; Thu, 27 Jul 2023 01:06:36 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.06.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:06:36 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v3 04/49] mm: shrinker: remove redundant shrinker_rwsem in debugfs operations Date: Thu, 27 Jul 2023 16:04:17 +0800 Message-Id: <20230727080502.77895-5-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net The debugfs_remove_recursive() will wait for debugfs_file_put() to return, so the shrinker will not be freed when doing debugfs operations (such as shrinker_debugfs_count_show() and shrinker_debugfs_scan_write()), so there is no need to hold shrinker_rwsem during debugfs operations. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- mm/shrinker_debug.c | 14 -------------- 1 file changed, 14 deletions(-) diff --git a/mm/shrinker_debug.c b/mm/shrinker_debug.c index 3ab53fad8876..f1becfd45853 100644 --- a/mm/shrinker_debug.c +++ b/mm/shrinker_debug.c @@ -55,11 +55,6 @@ static int shrinker_debugfs_count_show(struct seq_file *m, void *v) if (!count_per_node) return -ENOMEM; - ret = down_read_killable(&shrinker_rwsem); - if (ret) { - kfree(count_per_node); - return ret; - } rcu_read_lock(); memcg_aware = shrinker->flags & SHRINKER_MEMCG_AWARE; @@ -92,7 +87,6 @@ static int shrinker_debugfs_count_show(struct seq_file *m, void *v) } while ((memcg = mem_cgroup_iter(NULL, memcg, NULL)) != NULL); rcu_read_unlock(); - up_read(&shrinker_rwsem); kfree(count_per_node); return ret; @@ -117,7 +111,6 @@ static ssize_t shrinker_debugfs_scan_write(struct file *file, struct mem_cgroup *memcg = NULL; int nid; char kbuf[72]; - ssize_t ret; read_len = size < (sizeof(kbuf) - 1) ? size : (sizeof(kbuf) - 1); if (copy_from_user(kbuf, buf, read_len)) @@ -146,12 +139,6 @@ static ssize_t shrinker_debugfs_scan_write(struct file *file, return -EINVAL; } - ret = down_read_killable(&shrinker_rwsem); - if (ret) { - mem_cgroup_put(memcg); - return ret; - } - sc.nid = nid; sc.memcg = memcg; sc.nr_to_scan = nr_to_scan; @@ -159,7 +146,6 @@ static ssize_t shrinker_debugfs_scan_write(struct file *file, shrinker->scan_objects(shrinker, &sc); - up_read(&shrinker_rwsem); mem_cgroup_put(memcg); return size; From patchwork Thu Jul 27 08:04:18 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329280 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3BB3FD303 for ; Thu, 27 Jul 2023 08:08:11 +0000 (UTC) Received: from mail-pf1-x42d.google.com (mail-pf1-x42d.google.com [IPv6:2607:f8b0:4864:20::42d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 14139273B for ; Thu, 27 Jul 2023 01:07:43 -0700 (PDT) Received: by mail-pf1-x42d.google.com with SMTP id d2e1a72fcca58-6748a616e17so182395b3a.1 for ; Thu, 27 Jul 2023 01:07:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445210; x=1691050010; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=BqN9tp9prAKwSL/xaaZwvgP8yGlZqKh7lkz65rMIkwI=; b=GBN6icr0hE5mqHPTJBEmQxE0sSmLZpA0St1dP4Z/yKynevT5W5Jxqj0TR7Mr4urM6a rcvFQA+K57yE1B1k6K85qRXWvWixdU3NSLe4VzCycF5GoWTLlRciA5X2RKhqi0HQoE8b 1a0IYfWezvO06Io3dLOeFyq1ZqsXTQYxhrgkmMYVYzQ0UKpbC4ibvswUM8qhqUbr7+wb uRN2A2UnEH8zWwCm8m7EgP4dOqoYkNd5OlXdJtG3fRVi7RhcVNJSFfLr6LMTE1C8b+sp ezPa3QCc3RdGZTkOuGv4gf4U4junA2Kk+3yhYNlyx/A90D5GFHra7wi3SwF/mLuKqPhB hHsQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445210; x=1691050010; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=BqN9tp9prAKwSL/xaaZwvgP8yGlZqKh7lkz65rMIkwI=; b=B20DkNqHzLSCGL+GDCWak38Dy8//OotXtTi7k1OrBvx2gxesQ7WuIuX7bzPr+vpehx cqEG6IT5AaHDzYFkVxJdmsNz397QcBCXl3bQ+SpwK+yi9N894GN4uPTEDA0Pi8s6Bkgj W5u7vC9ZgFViYcAcjhnZZ61UFpeSBjRVNYHEQfrFM0ofWe6PhrjFV5fPB8aUtIm0FJi/ bcV3aUDCMz6+dyQMgq70VyQskL6oKc5K/Fn0rgO8MxgvgyMAiR1lGJi/CFNX4B+KNa7y 9O9z+xUnIfyBpdC6Z4XqoM1kBI2XQVFUfBFJOQbfqhrfnPpDhvN65gsdNXeZUT+kQvIj 0Szw== X-Gm-Message-State: ABy/qLa/KynrVPbvOxlGet2gQ51fJtxQwXMfyOyVZgxYdHKdtcmKhX6i YBvPcl1B77iBdYc/xXoQAZpbgg== X-Google-Smtp-Source: APBJJlGqyHUGzcwYP72gZn72jBkXTN2mSwLe5z3KDdW3R9YyUcC+gdVHx8KhimUXzhfrGyXx8SlIVg== X-Received: by 2002:a05:6a20:918e:b0:11a:dbb3:703b with SMTP id v14-20020a056a20918e00b0011adbb3703bmr5539836pzd.6.1690445210111; Thu, 27 Jul 2023 01:06:50 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.06.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:06:48 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH v3 05/49] mm: shrinker: add infrastructure for dynamically allocating shrinker Date: Thu, 27 Jul 2023 16:04:18 +0800 Message-Id: <20230727080502.77895-6-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Currently, the shrinker instances can be divided into the following three types: a) global shrinker instance statically defined in the kernel, such as workingset_shadow_shrinker. b) global shrinker instance statically defined in the kernel modules, such as mmu_shrinker in x86. c) shrinker instance embedded in other structures. For case a, the memory of shrinker instance is never freed. For case b, the memory of shrinker instance will be freed after synchronize_rcu() when the module is unloaded. For case c, the memory of shrinker instance will be freed along with the structure it is embedded in. In preparation for implementing lockless slab shrink, we need to dynamically allocate those shrinker instances in case c, then the memory can be dynamically freed alone by calling kfree_rcu(). So this commit adds the following new APIs for dynamically allocating shrinker, and add a private_data field to struct shrinker to record and get the original embedded structure. 1. shrinker_alloc() Used to allocate shrinker instance itself and related memory, it will return a pointer to the shrinker instance on success and NULL on failure. 2. shrinker_register() Used to register the shrinker instance, which is same as the current register_shrinker_prepared(). 3. shrinker_free() Used to unregister (if needed) and free the shrinker instance. In order to simplify shrinker-related APIs and make shrinker more independent of other kernel mechanisms, subsequent submissions will use the above API to convert all shrinkers (including case a and b) to dynamically allocated, and then remove all existing APIs. This will also have another advantage mentioned by Dave Chinner: ``` The other advantage of this is that it will break all the existing out of tree code and third party modules using the old API and will no longer work with a kernel using lockless slab shrinkers. They need to break (both at the source and binary levels) to stop bad things from happening due to using uncoverted shrinkers in the new setup. ``` Signed-off-by: Qi Zheng --- include/linux/shrinker.h | 7 +++ mm/internal.h | 11 +++++ mm/shrinker.c | 101 +++++++++++++++++++++++++++++++++++++++ mm/shrinker_debug.c | 17 ++++++- 4 files changed, 134 insertions(+), 2 deletions(-) diff --git a/include/linux/shrinker.h b/include/linux/shrinker.h index 8dc15aa37410..cc23ff0aee20 100644 --- a/include/linux/shrinker.h +++ b/include/linux/shrinker.h @@ -70,6 +70,8 @@ struct shrinker { int seeks; /* seeks to recreate an obj */ unsigned flags; + void *private_data; + /* These are for internal use */ struct list_head list; #ifdef CONFIG_MEMCG @@ -95,6 +97,11 @@ struct shrinker { * non-MEMCG_AWARE shrinker should not have this flag set. */ #define SHRINKER_NONSLAB (1 << 3) +#define SHRINKER_ALLOCATED (1 << 4) + +struct shrinker *shrinker_alloc(unsigned int flags, const char *fmt, ...); +void shrinker_register(struct shrinker *shrinker); +void shrinker_free(struct shrinker *shrinker); extern int __printf(2, 3) prealloc_shrinker(struct shrinker *shrinker, const char *fmt, ...); diff --git a/mm/internal.h b/mm/internal.h index 8b82038dcc6a..38434175df86 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -1144,6 +1144,9 @@ unsigned long shrink_slab(gfp_t gfp_mask, int nid, struct mem_cgroup *memcg, #ifdef CONFIG_SHRINKER_DEBUG extern int shrinker_debugfs_add(struct shrinker *shrinker); +extern int shrinker_debugfs_name_alloc(struct shrinker *shrinker, + const char *fmt, va_list ap); +extern void shrinker_debugfs_name_free(struct shrinker *shrinker); extern struct dentry *shrinker_debugfs_detach(struct shrinker *shrinker, int *debugfs_id); extern void shrinker_debugfs_remove(struct dentry *debugfs_entry, @@ -1153,6 +1156,14 @@ static inline int shrinker_debugfs_add(struct shrinker *shrinker) { return 0; } +static inline int shrinker_debugfs_name_alloc(struct shrinker *shrinker, + const char *fmt, va_list ap) +{ + return 0; +} +static inline void shrinker_debugfs_name_free(struct shrinker *shrinker) +{ +} static inline struct dentry *shrinker_debugfs_detach(struct shrinker *shrinker, int *debugfs_id) { diff --git a/mm/shrinker.c b/mm/shrinker.c index 043c87ccfab4..43a375f954f3 100644 --- a/mm/shrinker.c +++ b/mm/shrinker.c @@ -550,6 +550,107 @@ unsigned long shrink_slab(gfp_t gfp_mask, int nid, struct mem_cgroup *memcg, return freed; } +struct shrinker *shrinker_alloc(unsigned int flags, const char *fmt, ...) +{ + struct shrinker *shrinker; + unsigned int size; + va_list ap; + int err; + + shrinker = kzalloc(sizeof(struct shrinker), GFP_KERNEL); + if (!shrinker) + return NULL; + + va_start(ap, fmt); + err = shrinker_debugfs_name_alloc(shrinker, fmt, ap); + va_end(ap); + if (err) + goto err_name; + + shrinker->flags = flags | SHRINKER_ALLOCATED; + + if (flags & SHRINKER_MEMCG_AWARE) { + err = prealloc_memcg_shrinker(shrinker); + if (err == -ENOSYS) + shrinker->flags &= ~SHRINKER_MEMCG_AWARE; + else if (err == 0) + goto done; + else + goto err_flags; + } + + /* + * The nr_deferred is available on per memcg level for memcg aware + * shrinkers, so only allocate nr_deferred in the following cases: + * - non memcg aware shrinkers + * - !CONFIG_MEMCG + * - memcg is disabled by kernel command line + */ + size = sizeof(*shrinker->nr_deferred); + if (flags & SHRINKER_NUMA_AWARE) + size *= nr_node_ids; + + shrinker->nr_deferred = kzalloc(size, GFP_KERNEL); + if (!shrinker->nr_deferred) + goto err_flags; + +done: + return shrinker; + +err_flags: + shrinker_debugfs_name_free(shrinker); +err_name: + kfree(shrinker); + return NULL; +} +EXPORT_SYMBOL_GPL(shrinker_alloc); + +void shrinker_register(struct shrinker *shrinker) +{ + if (unlikely(!(shrinker->flags & SHRINKER_ALLOCATED))) { + pr_warn("Must use shrinker_alloc() to dynamically allocate the shrinker"); + return; + } + + down_write(&shrinker_rwsem); + list_add_tail(&shrinker->list, &shrinker_list); + shrinker->flags |= SHRINKER_REGISTERED; + shrinker_debugfs_add(shrinker); + up_write(&shrinker_rwsem); +} +EXPORT_SYMBOL_GPL(shrinker_register); + +void shrinker_free(struct shrinker *shrinker) +{ + struct dentry *debugfs_entry = NULL; + int debugfs_id; + + if (!shrinker) + return; + + down_write(&shrinker_rwsem); + if (shrinker->flags & SHRINKER_REGISTERED) { + list_del(&shrinker->list); + debugfs_entry = shrinker_debugfs_detach(shrinker, &debugfs_id); + shrinker->flags &= ~SHRINKER_REGISTERED; + } else { + shrinker_debugfs_name_free(shrinker); + } + + if (shrinker->flags & SHRINKER_MEMCG_AWARE) + unregister_memcg_shrinker(shrinker); + up_write(&shrinker_rwsem); + + if (debugfs_entry) + shrinker_debugfs_remove(debugfs_entry, debugfs_id); + + kfree(shrinker->nr_deferred); + shrinker->nr_deferred = NULL; + + kfree(shrinker); +} +EXPORT_SYMBOL_GPL(shrinker_free); + /* * Add a shrinker callback to be called from the vm. */ diff --git a/mm/shrinker_debug.c b/mm/shrinker_debug.c index f1becfd45853..506257585408 100644 --- a/mm/shrinker_debug.c +++ b/mm/shrinker_debug.c @@ -191,6 +191,20 @@ int shrinker_debugfs_add(struct shrinker *shrinker) return 0; } +int shrinker_debugfs_name_alloc(struct shrinker *shrinker, const char *fmt, + va_list ap) +{ + shrinker->name = kvasprintf_const(GFP_KERNEL, fmt, ap); + + return shrinker->name ? 0 : -ENOMEM; +} + +void shrinker_debugfs_name_free(struct shrinker *shrinker) +{ + kfree_const(shrinker->name); + shrinker->name = NULL; +} + int shrinker_debugfs_rename(struct shrinker *shrinker, const char *fmt, ...) { struct dentry *entry; @@ -239,8 +253,7 @@ struct dentry *shrinker_debugfs_detach(struct shrinker *shrinker, lockdep_assert_held(&shrinker_rwsem); - kfree_const(shrinker->name); - shrinker->name = NULL; + shrinker_debugfs_name_free(shrinker); *debugfs_id = entry ? shrinker->debugfs_id : -1; shrinker->debugfs_entry = NULL; From patchwork Thu Jul 27 08:04:19 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329282 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D23B0D50B for ; Thu, 27 Jul 2023 08:08:19 +0000 (UTC) Received: from mail-pf1-x435.google.com (mail-pf1-x435.google.com [IPv6:2607:f8b0:4864:20::435]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6094535B8 for ; Thu, 27 Jul 2023 01:07:56 -0700 (PDT) Received: by mail-pf1-x435.google.com with SMTP id d2e1a72fcca58-6862d4a1376so188392b3a.0 for ; Thu, 27 Jul 2023 01:07:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445222; x=1691050022; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=hJ9OcOwqZEZhIoLNGrov7as0vMS5t1dTfm2Sm9qefJI=; b=AioCATUlkHfrdNMX26y5cMG8yiZzcrqJVPo4kMJoo0a/SPBGZMItYxbURGlfK0qQ3U pdquqHjvBnBibcfcPa96/7pchRYEBHxyNnf24E8fTswl7dwSe4DIa81z6/ovJRcM58gW OCn1XGDPuwokH00bwAsXcK1Gr5D3vpz/ZXjhjYJknWBgLZAbQPwFGeGyEdzXyVgOqH5z Y8WwL8gpftvasBEeZpl0cei4t7+d2ZCdr5qxpBrrzaVJwzr8lwB/25SUTyxKcTGn9xox E7xpcSMCUuenHibKLxGm6dPJne0R4y90eWbLKKoQI9m29dm8UqZ2/hC+L12FcXTeAlus bdTQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445222; x=1691050022; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=hJ9OcOwqZEZhIoLNGrov7as0vMS5t1dTfm2Sm9qefJI=; b=Pl34dQwEPx+PMO+nMFRvkeKRIl7EA8X1h7RclKNXJ1OFQYNBR/3Sh9rrPRRKEjcXuL BGTI0t4vcnnTeLTa4lIgnu9JvrKllaVdd+sSReSgQY7FyEawA0L4gygUTaNOlKue4mdU eVeQTeMDX5Uq9zf9xM4EkDDtPKarJ5LFsj8NRiWXbQvwS7z/uN7HMyG26y6GPQJ9l+nI VSNTNWpllwH7PxREo+nN24P7cQN9l29v2xZhibP+U+/qW6EGwYPVG97b8eeDQA/3h5ZH 4xJzm4kJNpkJm8ejNA0mqWLt9/jZhco9vgiK8otSrH9jgEFMOTno/aqELjxudWWHTUO9 CqvA== X-Gm-Message-State: ABy/qLYqABj7rW2MJoIL/BW/4LVrZ7wyJXFtNQ0n3uhW7P2MDFzSsSuX LGs+aBTrRwByAlipnEaMivgEWA== X-Google-Smtp-Source: APBJJlEQjBlPfpR5V6JAfBPtQGnM4uH9f200On7b1qJi/VneGv5RiS5uPlFi7ClY0YXsCiY0kjcbBw== X-Received: by 2002:aa7:8615:0:b0:681:9fe0:b543 with SMTP id p21-20020aa78615000000b006819fe0b543mr4619538pfn.2.1690445222261; Thu, 27 Jul 2023 01:07:02 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.06.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:07:01 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v3 06/49] kvm: mmu: dynamically allocate the x86-mmu shrinker Date: Thu, 27 Jul 2023 16:04:19 +0800 Message-Id: <20230727080502.77895-7-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Use new APIs to dynamically allocate the x86-mmu shrinker. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- arch/x86/kvm/mmu/mmu.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index ec169f5c7dce..15fc92a24a26 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -6847,11 +6847,7 @@ static unsigned long mmu_shrink_count(struct shrinker *shrink, return percpu_counter_read_positive(&kvm_total_used_mmu_pages); } -static struct shrinker mmu_shrinker = { - .count_objects = mmu_shrink_count, - .scan_objects = mmu_shrink_scan, - .seeks = DEFAULT_SEEKS * 10, -}; +static struct shrinker *mmu_shrinker; static void mmu_destroy_caches(void) { @@ -6984,10 +6980,16 @@ int kvm_mmu_vendor_module_init(void) if (percpu_counter_init(&kvm_total_used_mmu_pages, 0, GFP_KERNEL)) goto out; - ret = register_shrinker(&mmu_shrinker, "x86-mmu"); - if (ret) + mmu_shrinker = shrinker_alloc(0, "x86-mmu"); + if (!mmu_shrinker) goto out_shrinker; + mmu_shrinker->count_objects = mmu_shrink_count; + mmu_shrinker->scan_objects = mmu_shrink_scan; + mmu_shrinker->seeks = DEFAULT_SEEKS * 10; + + shrinker_register(mmu_shrinker); + return 0; out_shrinker: @@ -7009,7 +7011,7 @@ void kvm_mmu_vendor_module_exit(void) { mmu_destroy_caches(); percpu_counter_destroy(&kvm_total_used_mmu_pages); - unregister_shrinker(&mmu_shrinker); + shrinker_free(mmu_shrinker); } /* From patchwork Thu Jul 27 08:04:20 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329283 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3706DD50B for ; Thu, 27 Jul 2023 08:08:28 +0000 (UTC) Received: from mail-pf1-x433.google.com (mail-pf1-x433.google.com [IPv6:2607:f8b0:4864:20::433]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AA45C6589 for ; Thu, 27 Jul 2023 01:08:03 -0700 (PDT) Received: by mail-pf1-x433.google.com with SMTP id d2e1a72fcca58-6862d4a1376so188439b3a.0 for ; Thu, 27 Jul 2023 01:08:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445234; x=1691050034; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=YQ2nJ797AaeiRC4tEbuFSwr/qroaEGD64TBkJX9gwcc=; b=krf0rRSBuACihGG0HOfvmWM3fExNQmmDQBZSFypO9OF26g2F9IRQXNjarXAj+rDJ2F j6wi8ORGszAJ8F4/2B5RfozFOO9c5wQvkPuwF+U0dnMIFYzI2u+dIV518lO0Mey/M0g+ DAIhAFbNX4boMgnEYCrLvSqMruXRlIM+AwHL8QP9OXWtql9jawORm8JA9K2pNt2CM3by 1AI1wCMU2elwBWzc8zmddDhb5S57BlUFVrs7Qpu26KSs608fAqSWn4u6Hcxn6Nu/AYp6 eAYr/PxpZmg2LEli6lhHn6OsT6FdGj3gL7SNMtigAeYxmILx7EQ2Lx+oYLfIsw664x5Q hi2w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445234; x=1691050034; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=YQ2nJ797AaeiRC4tEbuFSwr/qroaEGD64TBkJX9gwcc=; b=aRwGEOMGE7PrM95gEEBGLGY55ts6eZXm146jYFllrzxbMfJsm6z6kJkIKVSbq5OMXI L1aChNAwluqVwIXJvTKICOyzv5F2KejZ8PBtijiGU3PLVX4qJiap1smN2RAhBC5ep31C 9csHMW47vCYHhRA1XHvurlTt5wJN51GbT963onoV8KvFhb4qfhDqCYpWhw6+YbXUgRdH tlHGXdrL/Hhi9Nj1y1QNFYPOdilu7rOVsZ2dhktk3m/OAbFdOKQGRT7fNZxdLnSm9Els kRwhAWbRi7TgzTU5rYYpaaA1Q1v38Zt6HTHfTrxHnZNTYIf0cc5EiibZCraYZtZt0AVU 4GAw== X-Gm-Message-State: ABy/qLaIFyZUpx4OMJ0VN7GMH37SJQFpccGyrPqSHeukipLtRnp8qAkF oUfKWOMUSa7FxHT7bDcdWqceJA== X-Google-Smtp-Source: APBJJlExJjCwBoW4B5netumBOqdfs5+SJLDXxiJ/1dno6haNjCE+wUan/A+nwEsop7KuM9iLlMTgjA== X-Received: by 2002:a05:6a20:918e:b0:11a:dbb3:703b with SMTP id v14-20020a056a20918e00b0011adbb3703bmr5540739pzd.6.1690445233998; Thu, 27 Jul 2023 01:07:13 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.07.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:07:13 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH v3 07/49] binder: dynamically allocate the android-binder shrinker Date: Thu, 27 Jul 2023 16:04:20 +0800 Message-Id: <20230727080502.77895-8-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Use new APIs to dynamically allocate the android-binder shrinker. Signed-off-by: Qi Zheng --- drivers/android/binder_alloc.c | 31 +++++++++++++++++++------------ 1 file changed, 19 insertions(+), 12 deletions(-) diff --git a/drivers/android/binder_alloc.c b/drivers/android/binder_alloc.c index e3db8297095a..62675cedd38e 100644 --- a/drivers/android/binder_alloc.c +++ b/drivers/android/binder_alloc.c @@ -1053,11 +1053,7 @@ binder_shrink_scan(struct shrinker *shrink, struct shrink_control *sc) NULL, sc->nr_to_scan); } -static struct shrinker binder_shrinker = { - .count_objects = binder_shrink_count, - .scan_objects = binder_shrink_scan, - .seeks = DEFAULT_SEEKS, -}; +static struct shrinker *binder_shrinker; /** * binder_alloc_init() - called by binder_open() for per-proc initialization @@ -1077,19 +1073,30 @@ void binder_alloc_init(struct binder_alloc *alloc) int binder_alloc_shrinker_init(void) { - int ret = list_lru_init(&binder_alloc_lru); + int ret; - if (ret == 0) { - ret = register_shrinker(&binder_shrinker, "android-binder"); - if (ret) - list_lru_destroy(&binder_alloc_lru); + ret = list_lru_init(&binder_alloc_lru); + if (ret) + return ret; + + binder_shrinker = shrinker_alloc(0, "android-binder"); + if (!binder_shrinker) { + list_lru_destroy(&binder_alloc_lru); + return -ENOMEM; } - return ret; + + binder_shrinker->count_objects = binder_shrink_count; + binder_shrinker->scan_objects = binder_shrink_scan; + binder_shrinker->seeks = DEFAULT_SEEKS; + + shrinker_register(binder_shrinker); + + return 0; } void binder_alloc_shrinker_exit(void) { - unregister_shrinker(&binder_shrinker); + shrinker_free(binder_shrinker); list_lru_destroy(&binder_alloc_lru); } From patchwork Thu Jul 27 08:04:21 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329284 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 29635C2F9 for ; Thu, 27 Jul 2023 08:08:53 +0000 (UTC) Received: from mail-pf1-x436.google.com (mail-pf1-x436.google.com [IPv6:2607:f8b0:4864:20::436]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 08DF2449B for ; Thu, 27 Jul 2023 01:08:29 -0700 (PDT) Received: by mail-pf1-x436.google.com with SMTP id d2e1a72fcca58-66d6a9851f3so167643b3a.0 for ; Thu, 27 Jul 2023 01:08:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445246; x=1691050046; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=ppdDbzxLfV7T8uyJ0+LWzuRMVQS50F9BO9dGotbDPbU=; b=KpqQJYQnD6XZcHjbv/+muTq0vlYb8upK5OWv1aGKt50KKzUi7i+JzF6oBUUsqnnZ8J r8wNd0ItebBMmbL+7PFob82/siVz2lcTITJgiPWkofH/9LJHrT7eh309V59HxxQ0mOlE DIoyoSTd+eeARDBsSwfCZZT+D1eJ9vMkwqGXz/n2dx2kEZLuZLLaNunG9PbX3wXH0AxZ KS3Doj3WekVbT+DS1JWdAAgXSNDy2XRSFj8TbzZy0Apg5FVE8T/dZYbRy2KedtCvtde/ VVp4H8rT9xtwGwXR6cSDDmcPYDcWy0CdFKjtAgYv/8XnYUvwEF4uwit6TMoEpzOExIim mxxA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445246; x=1691050046; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=ppdDbzxLfV7T8uyJ0+LWzuRMVQS50F9BO9dGotbDPbU=; b=gIy88MnSVnIgvz6jTLAgwKRZqhtYWN3ziwG0h2rqC17DJ1iwTUEaHYpaBmAsekSndl 1S3GMmYfLV56lN1LwAyaTbR1wUIlYGxhqEEFsIaO6hrFcJUqhOkCuQgnOaBM4khim0JD wbfciveX2D7o69MEjvNFhtJS3KJ8kD5TjCqem4zhYg9XmkB9puxyoEYE8zSKrdgkBG1j 1CrCV1B5/6PrTIMFP6f51Xb5N2XWZnAaToTBokI4LmvIgdm7NGcqgMDaIVq4kVMFupVE WTEd3YK/5r8wekyj1iGHtf0Smb73GXLsd+L5x4qUG9RkA6/2VckSWC0wQq8k606q/aBh SaIg== X-Gm-Message-State: ABy/qLaJS4t2HN9vULT3Yu1cnBjwKb609Z5/bnUvdK1dIpLmi5TmTn9Y qFE4E/goYQKBWDxLpQSA8TSQ0g== X-Google-Smtp-Source: APBJJlG6gnRngQzsFbw9KnzolcByCK3s/MKtuzn55eodinGMlyRsxgSHfIHEIFN3Q1pZ+W9H3PfVAg== X-Received: by 2002:a05:6a00:2b90:b0:67d:308b:97ef with SMTP id dv16-20020a056a002b9000b0067d308b97efmr4583872pfb.2.1690445246349; Thu, 27 Jul 2023 01:07:26 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.07.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:07:25 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v3 08/49] drm/ttm: dynamically allocate the drm-ttm_pool shrinker Date: Thu, 27 Jul 2023 16:04:21 +0800 Message-Id: <20230727080502.77895-9-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Use new APIs to dynamically allocate the drm-ttm_pool shrinker. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- drivers/gpu/drm/ttm/ttm_pool.c | 23 +++++++++++++++-------- 1 file changed, 15 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/ttm/ttm_pool.c b/drivers/gpu/drm/ttm/ttm_pool.c index cddb9151d20f..c9c9618c0dce 100644 --- a/drivers/gpu/drm/ttm/ttm_pool.c +++ b/drivers/gpu/drm/ttm/ttm_pool.c @@ -73,7 +73,7 @@ static struct ttm_pool_type global_dma32_uncached[MAX_ORDER + 1]; static spinlock_t shrinker_lock; static struct list_head shrinker_list; -static struct shrinker mm_shrinker; +static struct shrinker *mm_shrinker; /* Allocate pages of size 1 << order with the given gfp_flags */ static struct page *ttm_pool_alloc_page(struct ttm_pool *pool, gfp_t gfp_flags, @@ -734,8 +734,8 @@ static int ttm_pool_debugfs_shrink_show(struct seq_file *m, void *data) struct shrink_control sc = { .gfp_mask = GFP_NOFS }; fs_reclaim_acquire(GFP_KERNEL); - seq_printf(m, "%lu/%lu\n", ttm_pool_shrinker_count(&mm_shrinker, &sc), - ttm_pool_shrinker_scan(&mm_shrinker, &sc)); + seq_printf(m, "%lu/%lu\n", ttm_pool_shrinker_count(mm_shrinker, &sc), + ttm_pool_shrinker_scan(mm_shrinker, &sc)); fs_reclaim_release(GFP_KERNEL); return 0; @@ -779,10 +779,17 @@ int ttm_pool_mgr_init(unsigned long num_pages) &ttm_pool_debugfs_shrink_fops); #endif - mm_shrinker.count_objects = ttm_pool_shrinker_count; - mm_shrinker.scan_objects = ttm_pool_shrinker_scan; - mm_shrinker.seeks = 1; - return register_shrinker(&mm_shrinker, "drm-ttm_pool"); + mm_shrinker = shrinker_alloc(0, "drm-ttm_pool"); + if (!mm_shrinker) + return -ENOMEM; + + mm_shrinker->count_objects = ttm_pool_shrinker_count; + mm_shrinker->scan_objects = ttm_pool_shrinker_scan; + mm_shrinker->seeks = 1; + + shrinker_register(mm_shrinker); + + return 0; } /** @@ -802,6 +809,6 @@ void ttm_pool_mgr_fini(void) ttm_pool_type_fini(&global_dma32_uncached[i]); } - unregister_shrinker(&mm_shrinker); + shrinker_free(mm_shrinker); WARN_ON(!list_empty(&shrinker_list)); } From patchwork Thu Jul 27 08:04:22 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329285 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 10E93C2FF for ; Thu, 27 Jul 2023 08:09:04 +0000 (UTC) Received: from mail-pf1-x435.google.com (mail-pf1-x435.google.com [IPv6:2607:f8b0:4864:20::435]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3299A4C0B for ; Thu, 27 Jul 2023 01:08:42 -0700 (PDT) Received: by mail-pf1-x435.google.com with SMTP id d2e1a72fcca58-682b1768a0bso174677b3a.0 for ; Thu, 27 Jul 2023 01:08:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445259; x=1691050059; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=bO4yc6b0222dRNj48HoFyPuU9QjRVolFKKVhhMGpLKw=; b=bsOGFEHMBlylId/BUUU6j2E7pnjQ9uMa3Dv7D6LoIY48uPLQavKrpj689NrNUpNLTl Aanz7sKMrDaOTTGh4q0MwHTWAvihn1jLx/NBWz0K9CQrFU5rnVI5CzfKG4yO6ADEleGk +0iHBjbO0i9m2+usUNEX9xFmZ3EhQv1mJHg4H05ocCDdgDOngyKPTxLLXx+aCRh/qeWu DaVggQ15a1Fk3lZ/quyODiCtb+FgmREKB0V2Ac2I9AcArTAe8N9Pb2STGieOdKv9GKuP YDdg42gSOnr6HuMRpDchso7LM2qcKeKJNp+Y2dbUP8m4urT1oK6m0eJU2zmqUir1DcF2 Lspg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445259; x=1691050059; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=bO4yc6b0222dRNj48HoFyPuU9QjRVolFKKVhhMGpLKw=; b=SlmmnVMiHt9eaDCFDJ6zWo9g3pnNcsf0Wn+YPSUtjMdRj1eLcjzDqWJc0/uENX6Oqm Sijj0toqnd6mFAeFnoUAfpkeJVXLA3B05wLWfGCEVG5XIALqwRkJ77EGT6OPjGSVoeMN xsiyoXey9kjF9uSKfkzWYXVGWfUzGCkUztnbvlelDNhnYjWHKkvrRAh2tBa8F4m2nStf iOJfLTjUEPWVAqg54lfYXFQs+auyJJag/o3RmVTRSAdKVtn7gvvf2WMkKP1uHJ9W+MTN 6r43CTpxQVxZE2B2rkwZa2PQ7UpSaBnAkpjeHb6CTn3kAgX1vtj88jDWwQZO40UNL7uq ROxQ== X-Gm-Message-State: ABy/qLZ4o/Gu3Q6tn4BlscmxLbxae3wyGqGixc8jNzpo8a2ZfF8WQbVE QNpKi7ncSoS6viDBW1SR7FWZIw== X-Google-Smtp-Source: APBJJlEtjuu7JvMViG/zI1+BRK6QgnXajX34xFKdSMMqB1WswZOW9mIhLIlLvIrLtx031P4ulw5hGg== X-Received: by 2002:a05:6a20:9381:b0:137:8f19:1de7 with SMTP id x1-20020a056a20938100b001378f191de7mr6160325pzh.0.1690445259706; Thu, 27 Jul 2023 01:07:39 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.07.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:07:39 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v3 09/49] xenbus/backend: dynamically allocate the xen-backend shrinker Date: Thu, 27 Jul 2023 16:04:22 +0800 Message-Id: <20230727080502.77895-10-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Use new APIs to dynamically allocate the xen-backend shrinker. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- drivers/xen/xenbus/xenbus_probe_backend.c | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-) diff --git a/drivers/xen/xenbus/xenbus_probe_backend.c b/drivers/xen/xenbus/xenbus_probe_backend.c index da96c260e26b..929c41a5ccee 100644 --- a/drivers/xen/xenbus/xenbus_probe_backend.c +++ b/drivers/xen/xenbus/xenbus_probe_backend.c @@ -284,13 +284,9 @@ static unsigned long backend_shrink_memory_count(struct shrinker *shrinker, return 0; } -static struct shrinker backend_memory_shrinker = { - .count_objects = backend_shrink_memory_count, - .seeks = DEFAULT_SEEKS, -}; - static int __init xenbus_probe_backend_init(void) { + struct shrinker *backend_memory_shrinker; static struct notifier_block xenstore_notifier = { .notifier_call = backend_probe_and_watch }; @@ -305,8 +301,16 @@ static int __init xenbus_probe_backend_init(void) register_xenstore_notifier(&xenstore_notifier); - if (register_shrinker(&backend_memory_shrinker, "xen-backend")) - pr_warn("shrinker registration failed\n"); + backend_memory_shrinker = shrinker_alloc(0, "xen-backend"); + if (!backend_memory_shrinker) { + pr_warn("shrinker allocation failed\n"); + return 0; + } + + backend_memory_shrinker->count_objects = backend_shrink_memory_count; + backend_memory_shrinker->seeks = DEFAULT_SEEKS; + + shrinker_register(backend_memory_shrinker); return 0; } From patchwork Thu Jul 27 08:04:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329286 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E1B04C2F9 for ; Thu, 27 Jul 2023 08:09:27 +0000 (UTC) Received: from mail-pf1-x42e.google.com (mail-pf1-x42e.google.com [IPv6:2607:f8b0:4864:20::42e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3F4564EEF for ; Thu, 27 Jul 2023 01:09:05 -0700 (PDT) Received: by mail-pf1-x42e.google.com with SMTP id d2e1a72fcca58-6748a616e17so182592b3a.1 for ; Thu, 27 Jul 2023 01:09:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445272; x=1691050072; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=ubpyp4SIhGXjO6/VTKiZvWjlRzyN8ANvKHVN5xSGnIw=; b=JnEFWCJ0lfqLQ09KAhpDiGnRAmdtfYhke3aIyqMGyaI1u+7/j8X1g+ymABPYujVt+w cz28zAP40524HNhXDL9Q5SofaC1n/CPA+MmByiqiYd170BhvKkwUMWNTWGQlZaYnqgaR FBpKNnlG1vtBshrp2zrDJ2SvCtcPtO2Uoxi7Td9WriKIRN+9BBM1kAj+4w0IHie3PsAJ NEqh91Op9gs693bzhjwiJV1tmOiwkF+OnmYUm9c5BSiHcRPJXsNw4NR6JZLqvW90Jp1l wYlHCbMfcgp//O2TdulFnaEsdlVg5OO3iU4DnTCf9/O5RCqrJgKtWA6LRsXmBpSaFsGJ 4ftA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445272; x=1691050072; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=ubpyp4SIhGXjO6/VTKiZvWjlRzyN8ANvKHVN5xSGnIw=; b=S58lAnNh2RNN+KiHhgel4KxXqodzof4fVFoS2Gs50khpasoxBHZ7P47CDVlhyBzi1g klJiDDg+kb7SmesPrn9ojh6ijZc2sa4GeMOUj1GksT+IOMsrrUoaC/WnWfGfkwlAyLKt yah558zesHQ8eKnbxXZi/+wzVHltr25PRsiz8k3X1mQuB0oZMIHBL/opRqjRs/FQjcfP jsqZNmJZoTbO8bWx/plndyx8eSR5OicUc/z6bTkiAFDWR8nq2FvUGs0IHhqA4n23El7C I0x4ID7MUr+DQz4SrKQ85baMjhsofzaVDb6MR8JV9O3/Ap4wGrhAzCiu8wye8bMN9R4+ 7ZyQ== X-Gm-Message-State: ABy/qLa6kPMXxd/DlTzqIPYoyTRIOsABY59lvreiWXx/5Fh40Jpkl8Ow TCuHwEvtxbkP+ygIOXt7tAXh5w== X-Google-Smtp-Source: APBJJlH8Hm//FCUnZvKJ1Fsda02AnYQWQqq2rUtStc8LnYU5/NdJ+w8F5lFLyohrr/NHLskzxbNOmQ== X-Received: by 2002:a05:6a00:2d09:b0:682:59aa:178d with SMTP id fa9-20020a056a002d0900b0068259aa178dmr4647270pfb.1.1690445272018; Thu, 27 Jul 2023 01:07:52 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.07.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:07:51 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v3 10/49] erofs: dynamically allocate the erofs-shrinker Date: Thu, 27 Jul 2023 16:04:23 +0800 Message-Id: <20230727080502.77895-11-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Use new APIs to dynamically allocate the erofs-shrinker. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/erofs/utils.c | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-) diff --git a/fs/erofs/utils.c b/fs/erofs/utils.c index cc6fb9e98899..6e1a828e6ca3 100644 --- a/fs/erofs/utils.c +++ b/fs/erofs/utils.c @@ -270,19 +270,25 @@ static unsigned long erofs_shrink_scan(struct shrinker *shrink, return freed; } -static struct shrinker erofs_shrinker_info = { - .scan_objects = erofs_shrink_scan, - .count_objects = erofs_shrink_count, - .seeks = DEFAULT_SEEKS, -}; +static struct shrinker *erofs_shrinker_info; int __init erofs_init_shrinker(void) { - return register_shrinker(&erofs_shrinker_info, "erofs-shrinker"); + erofs_shrinker_info = shrinker_alloc(0, "erofs-shrinker"); + if (!erofs_shrinker_info) + return -ENOMEM; + + erofs_shrinker_info->count_objects = erofs_shrink_count; + erofs_shrinker_info->scan_objects = erofs_shrink_scan; + erofs_shrinker_info->seeks = DEFAULT_SEEKS; + + shrinker_register(erofs_shrinker_info); + + return 0; } void erofs_exit_shrinker(void) { - unregister_shrinker(&erofs_shrinker_info); + shrinker_free(erofs_shrinker_info); } #endif /* !CONFIG_EROFS_FS_ZIP */ From patchwork Thu Jul 27 08:04:24 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329546 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A14D4C8F7 for ; Thu, 27 Jul 2023 08:19:45 +0000 (UTC) Received: from mail-oa1-x29.google.com (mail-oa1-x29.google.com [IPv6:2001:4860:4864:20::29]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CE5927281 for ; Thu, 27 Jul 2023 01:19:33 -0700 (PDT) Received: by mail-oa1-x29.google.com with SMTP id 586e51a60fabf-1bb6d6b09d6so180798fac.1 for ; Thu, 27 Jul 2023 01:19:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445973; x=1691050773; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=f+zNYaRC7WOrXvS9MeEiQUBTAQfjLjc/pgN/esuhj34=; b=GmUZDD+EgFdEgpQcYK1fOaKOP8W8TSl0tQPNcr8AA8RQQGOVTVyGsM7HFpU8SepyvA GXwZDa2Y1bXsQIYO0nzg31yGDJf95fG1816QERkq+G7/ZKqdXcbfJwsbag5n+BcpgUoE jPRAiCIOChyhubS2urA0u/n7qLSarlXLuK32rE34RrdoNl5KDnoMrbo30QpuypXafzqh Mmup8yTjFgYCHO+c9fWUpchfNVNQBFPk8//D3YUIi0ZzX3iGIM+C/82z+pk/mhHLIYXY K3Xr/HlPj1NY7v8K/XWHU7mmGl1dygFQoc2Y8Q6M0goU0BbAtQTv2jRf7SEqMNncmGNu s+/w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445973; x=1691050773; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=f+zNYaRC7WOrXvS9MeEiQUBTAQfjLjc/pgN/esuhj34=; b=Lmj26g5s+5Yr2x7+rUI5qmV56qZfIi6lhZq8O1oQrWcj6DX9142N+DpazdRMOc4j29 p1Dkt9+iUFeRDLRm9u9Lx87KEgU2j+b8iPE3LiDlLrcwpfo3QJI6lAj8808x0XudSskL zXqPErMbdm1wYmcMmHxOxuhXkI93jMh3BVRUiC+zJwvJpqZR2yert84adAThNtphxLSY I7ty50U5eV3EKbGrkrmDj1N6iHdZ/6mBkfBSncgnYQ9weH7YgEF8ahrZwL7464XxA9pK aE38iG4LWMCMfdfhjIc87f0gVEzQN+hesbDfJ0JR7Eg2hiucb35oFG2IOdwR31z20Gcf W5Ww== X-Gm-Message-State: ABy/qLZxqdZ1mT+hnPx2Q6sjS/lFer3rsiqmE0oZ/hGPbyGMjyf3Z4WP yQC++7HvMXH2TktyR/NtFDS9KIzeP1mMmGNoo/8= X-Google-Smtp-Source: APBJJlHpYZMPheHhGtAzh7w//Dgf2VgsvvziRNiT4CodVVfE3Y9RoyQKb/hEjPAgUidNi6thlhXB+g== X-Received: by 2002:a05:6a20:4286:b0:12d:77e:ba3 with SMTP id o6-20020a056a20428600b0012d077e0ba3mr6418674pzj.0.1690445284151; Thu, 27 Jul 2023 01:08:04 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.07.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:08:03 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v3 11/49] f2fs: dynamically allocate the f2fs-shrinker Date: Thu, 27 Jul 2023 16:04:24 +0800 Message-Id: <20230727080502.77895-12-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Use new APIs to dynamically allocate the f2fs-shrinker. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/f2fs/super.c | 32 ++++++++++++++++++++++++-------- 1 file changed, 24 insertions(+), 8 deletions(-) diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index a123f1378d57..9200b67aa745 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -83,11 +83,27 @@ void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate, #endif /* f2fs-wide shrinker description */ -static struct shrinker f2fs_shrinker_info = { - .scan_objects = f2fs_shrink_scan, - .count_objects = f2fs_shrink_count, - .seeks = DEFAULT_SEEKS, -}; +static struct shrinker *f2fs_shrinker_info; + +static int __init f2fs_init_shrinker(void) +{ + f2fs_shrinker_info = shrinker_alloc(0, "f2fs-shrinker"); + if (!f2fs_shrinker_info) + return -ENOMEM; + + f2fs_shrinker_info->count_objects = f2fs_shrink_count; + f2fs_shrinker_info->scan_objects = f2fs_shrink_scan; + f2fs_shrinker_info->seeks = DEFAULT_SEEKS; + + shrinker_register(f2fs_shrinker_info); + + return 0; +} + +static void f2fs_exit_shrinker(void) +{ + shrinker_free(f2fs_shrinker_info); +} enum { Opt_gc_background, @@ -4937,7 +4953,7 @@ static int __init init_f2fs_fs(void) err = f2fs_init_sysfs(); if (err) goto free_garbage_collection_cache; - err = register_shrinker(&f2fs_shrinker_info, "f2fs-shrinker"); + err = f2fs_init_shrinker(); if (err) goto free_sysfs; err = register_filesystem(&f2fs_fs_type); @@ -4982,7 +4998,7 @@ static int __init init_f2fs_fs(void) f2fs_destroy_root_stats(); unregister_filesystem(&f2fs_fs_type); free_shrinker: - unregister_shrinker(&f2fs_shrinker_info); + f2fs_exit_shrinker(); free_sysfs: f2fs_exit_sysfs(); free_garbage_collection_cache: @@ -5014,7 +5030,7 @@ static void __exit exit_f2fs_fs(void) f2fs_destroy_post_read_processing(); f2fs_destroy_root_stats(); unregister_filesystem(&f2fs_fs_type); - unregister_shrinker(&f2fs_shrinker_info); + f2fs_exit_shrinker(); f2fs_exit_sysfs(); f2fs_destroy_garbage_collection_cache(); f2fs_destroy_extent_cache(); From patchwork Thu Jul 27 08:04:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329289 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6AF18DDA8 for ; Thu, 27 Jul 2023 08:09:57 +0000 (UTC) Received: from mail-pf1-x432.google.com (mail-pf1-x432.google.com [IPv6:2607:f8b0:4864:20::432]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0FF1355BF for ; Thu, 27 Jul 2023 01:09:39 -0700 (PDT) Received: by mail-pf1-x432.google.com with SMTP id d2e1a72fcca58-682eef7d752so203654b3a.0 for ; Thu, 27 Jul 2023 01:09:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445296; x=1691050096; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=XAY9+N2BbVQBjCT3MmFWkPxUR/2vf6o4m+CtMBoAzag=; b=LFYvlia4velFDizk2hHXlBW7f/l7rbfbGMuqLFZUpWLlBrVWlN4fEmfbvc4omxzXDA GS62NEHVqB0PFgv0flEq3EjMDASyoMQLwnHtJ15RD867cmoYFSzpLBJze2MH0FTuVYWD NsiHc1gWK/drytRuk+pd4JkJ3rj2hRu9B8SocS/OtbfY5xFfSOGukZMVRW73BQpYmdrG /5Ymr320vt1GGeIXCFFSw58+k2f5zcvch0LSG0bHy5CbC3AFLqLQjQMF/E7WQcKZk1m8 rvHs1btuYuzdVvuVmWOj+XioQ9BrFWnwjxo07/zHn9Dajw02v1LQ6Dr1U7VOL/6BCiXk S4AA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445296; x=1691050096; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=XAY9+N2BbVQBjCT3MmFWkPxUR/2vf6o4m+CtMBoAzag=; b=JPmDAoJIqsMbLrHU7XDAOmVtQ4Y+yFhau7DMYZQTBagO4W0w7Ap5QtVyq4lVPDhbMk KzdKSXeSGZctLXZqGVja0nXC4AGXGklTvHwL9zkeKcwv9KLEUn+DQo8HXsncaq8HUwPV us3ny7nKHmUG5bLPG0xoSmg72kqHKehWTlH+WdjSYG6PHL/no68CH2HL4ql/2XfVM5iV GKn8cFWm1R824UQaiJT5jeRpjNzpepJxDbOXeYorbiyfb9fJlb7vcsXfdliLJWJ6q+Ae TSCVLmFs+uMfHUQJLLKXIk7Lklovt2oCajK2AurZiVhlRK1qNLj6N30x2aTT5eBNew4V 2rOg== X-Gm-Message-State: ABy/qLY2N7XRk9pO6A7ZVaTD6/FtkhrUk/HxPX1DBeUhzl+Yb0natGLg zWuBpmX1KKhpVzdoXfo1sNuXQw== X-Google-Smtp-Source: APBJJlFXIDspBDKYt+edW+ekZSGIMkDEJizocNVTOvlzV7xMQBKW4TeDX8VYOaL7MgnXn0ggLAa8Tw== X-Received: by 2002:a05:6a00:1586:b0:67f:8ef5:2643 with SMTP id u6-20020a056a00158600b0067f8ef52643mr5200829pfk.2.1690445296182; Thu, 27 Jul 2023 01:08:16 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.08.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:08:15 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v3 12/49] gfs2: dynamically allocate the gfs2-glock shrinker Date: Thu, 27 Jul 2023 16:04:25 +0800 Message-Id: <20230727080502.77895-13-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Use new APIs to dynamically allocate the gfs2-glock shrinker. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/gfs2/glock.c | 20 +++++++++++--------- 1 file changed, 11 insertions(+), 9 deletions(-) diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c index 1438e7465e30..8d582ba7514f 100644 --- a/fs/gfs2/glock.c +++ b/fs/gfs2/glock.c @@ -2046,11 +2046,7 @@ static unsigned long gfs2_glock_shrink_count(struct shrinker *shrink, return vfs_pressure_ratio(atomic_read(&lru_count)); } -static struct shrinker glock_shrinker = { - .seeks = DEFAULT_SEEKS, - .count_objects = gfs2_glock_shrink_count, - .scan_objects = gfs2_glock_shrink_scan, -}; +static struct shrinker *glock_shrinker; /** * glock_hash_walk - Call a function for glock in a hash bucket @@ -2472,13 +2468,19 @@ int __init gfs2_glock_init(void) return -ENOMEM; } - ret = register_shrinker(&glock_shrinker, "gfs2-glock"); - if (ret) { + glock_shrinker = shrinker_alloc(0, "gfs2-glock"); + if (!glock_shrinker) { destroy_workqueue(glock_workqueue); rhashtable_destroy(&gl_hash_table); - return ret; + return -ENOMEM; } + glock_shrinker->count_objects = gfs2_glock_shrink_count; + glock_shrinker->scan_objects = gfs2_glock_shrink_scan; + glock_shrinker->seeks = DEFAULT_SEEKS; + + shrinker_register(glock_shrinker); + for (i = 0; i < GLOCK_WAIT_TABLE_SIZE; i++) init_waitqueue_head(glock_wait_table + i); @@ -2487,7 +2489,7 @@ int __init gfs2_glock_init(void) void gfs2_glock_exit(void) { - unregister_shrinker(&glock_shrinker); + shrinker_free(glock_shrinker); rhashtable_destroy(&gl_hash_table); destroy_workqueue(glock_workqueue); } From patchwork Thu Jul 27 08:04:26 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329287 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0B93FD307 for ; Thu, 27 Jul 2023 08:09:46 +0000 (UTC) Received: from mail-pf1-x434.google.com (mail-pf1-x434.google.com [IPv6:2607:f8b0:4864:20::434]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 042EA4EDC for ; Thu, 27 Jul 2023 01:09:25 -0700 (PDT) Received: by mail-pf1-x434.google.com with SMTP id d2e1a72fcca58-686f6231bdeso112715b3a.1 for ; Thu, 27 Jul 2023 01:09:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445308; x=1691050108; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=PjmSZHUI5/Kx8ZOfBbo02iydikdUH/y22dszJBbwnrc=; b=Xysv3RsPsBshttSMBUyUOf01pFj7ACJomxAeSKClYNtUM/IzDnc+1qcVpxKo3Yk7lI PMJO/0QAsBuNTHH31vZSyAI+mqZzOZhxUKyEZ0z882UMy5ds0dV7wjv4n79QhgQIluxL 7aiFKUJGI5uVRXEWRoqfDwEepuojrPx+nt9lSRf3+jabTyI60DcKdVq5RfgL5+gSsYt+ gIHfo7xL/z2KDHdpCbDlWUD9Wlzvl0HFxAouF/jEEZTs97EVMQFcZk2wLBhFoNV93wDr cOODQ3G+tMDc7b4BNamRJNYxJL3PiF9jIw3/5zQqa59OSVfyqIzXn4AyZmUz4TWVr103 SUHw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445308; x=1691050108; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=PjmSZHUI5/Kx8ZOfBbo02iydikdUH/y22dszJBbwnrc=; b=RIh+QWSVcKpc5nJArxMSa/L2Pr5SXFmlCnK/bDF1ao225njpnUfH5cNL0sw2L9yF0D iHEBamcp59RUe2GH3YipJ3WrszPXj/61J4QbxS7LWBy3KSmQJSWPrKZB+Zfr+nuckvXw FIjZQmHpmQRkrzz3zAQ2ek39UYQh7OYBfV+Xg/7KiCp3GuPEwFtNPctSZ7uqCozGnkDt Nl25kllClJms4TCNQ14tv+uK+9wFXSfhbTXhqiP+VKOdDG6Fb/+oy1gToXCt32wgrtLa 0aPX6jOcPT/3Yd1u797EYsiE30T0Z0+DKP9aTtt+SYtq8G+Oue2BZsP9fw8dhpIs6au3 8ZdA== X-Gm-Message-State: ABy/qLY5xnySVcgllpN7rjKlneTZnJpbGvBEIe9+lHCZfKUYzh9yL5JL 7RpbxQlcVekzAvNVoNFzz7q0Ew== X-Google-Smtp-Source: APBJJlEap1sNysOWJSQnWaDnt336ll2X4eQUWxGjP7f0SXFaJg3Iw5H2LPNpa2qt6BR3D4CNzXfNwg== X-Received: by 2002:a05:6a00:4a0e:b0:677:3439:874a with SMTP id do14-20020a056a004a0e00b006773439874amr5196539pfb.3.1690445308627; Thu, 27 Jul 2023 01:08:28 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.08.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:08:28 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH v3 13/49] gfs2: dynamically allocate the gfs2-qd shrinker Date: Thu, 27 Jul 2023 16:04:26 +0800 Message-Id: <20230727080502.77895-14-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Use new APIs to dynamically allocate the gfs2-qd shrinker. Signed-off-by: Qi Zheng --- fs/gfs2/main.c | 6 +++--- fs/gfs2/quota.c | 26 ++++++++++++++++++++------ fs/gfs2/quota.h | 3 ++- 3 files changed, 25 insertions(+), 10 deletions(-) diff --git a/fs/gfs2/main.c b/fs/gfs2/main.c index afcb32854f14..e47b1cc79f59 100644 --- a/fs/gfs2/main.c +++ b/fs/gfs2/main.c @@ -147,7 +147,7 @@ static int __init init_gfs2_fs(void) if (!gfs2_trans_cachep) goto fail_cachep8; - error = register_shrinker(&gfs2_qd_shrinker, "gfs2-qd"); + error = gfs2_qd_shrinker_init(); if (error) goto fail_shrinker; @@ -196,7 +196,7 @@ static int __init init_gfs2_fs(void) fail_wq2: destroy_workqueue(gfs_recovery_wq); fail_wq1: - unregister_shrinker(&gfs2_qd_shrinker); + gfs2_qd_shrinker_exit(); fail_shrinker: kmem_cache_destroy(gfs2_trans_cachep); fail_cachep8: @@ -229,7 +229,7 @@ static int __init init_gfs2_fs(void) static void __exit exit_gfs2_fs(void) { - unregister_shrinker(&gfs2_qd_shrinker); + gfs2_qd_shrinker_exit(); gfs2_glock_exit(); gfs2_unregister_debugfs(); unregister_filesystem(&gfs2_fs_type); diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c index aa5fd06d47bc..6cbf323bc4d0 100644 --- a/fs/gfs2/quota.c +++ b/fs/gfs2/quota.c @@ -186,13 +186,27 @@ static unsigned long gfs2_qd_shrink_count(struct shrinker *shrink, return vfs_pressure_ratio(list_lru_shrink_count(&gfs2_qd_lru, sc)); } -struct shrinker gfs2_qd_shrinker = { - .count_objects = gfs2_qd_shrink_count, - .scan_objects = gfs2_qd_shrink_scan, - .seeks = DEFAULT_SEEKS, - .flags = SHRINKER_NUMA_AWARE, -}; +static struct shrinker *gfs2_qd_shrinker; + +int __init gfs2_qd_shrinker_init(void) +{ + gfs2_qd_shrinker = shrinker_alloc(SHRINKER_NUMA_AWARE, "gfs2-qd"); + if (!gfs2_qd_shrinker) + return -ENOMEM; + + gfs2_qd_shrinker->count_objects = gfs2_qd_shrink_count; + gfs2_qd_shrinker->scan_objects = gfs2_qd_shrink_scan; + gfs2_qd_shrinker->seeks = DEFAULT_SEEKS; + + shrinker_register(gfs2_qd_shrinker); + return 0; +} + +void gfs2_qd_shrinker_exit(void) +{ + shrinker_free(gfs2_qd_shrinker); +} static u64 qd2index(struct gfs2_quota_data *qd) { diff --git a/fs/gfs2/quota.h b/fs/gfs2/quota.h index 21ada332d555..f0d54dcbbc75 100644 --- a/fs/gfs2/quota.h +++ b/fs/gfs2/quota.h @@ -59,7 +59,8 @@ static inline int gfs2_quota_lock_check(struct gfs2_inode *ip, } extern const struct quotactl_ops gfs2_quotactl_ops; -extern struct shrinker gfs2_qd_shrinker; +int __init gfs2_qd_shrinker_init(void); +void gfs2_qd_shrinker_exit(void); extern struct list_lru gfs2_qd_lru; extern void __init gfs2_quota_hash_init(void); From patchwork Thu Jul 27 08:04:27 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329288 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D302FC2FF for ; Thu, 27 Jul 2023 08:09:54 +0000 (UTC) Received: from mail-pf1-x429.google.com (mail-pf1-x429.google.com [IPv6:2607:f8b0:4864:20::429]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1C3E255AD for ; Thu, 27 Jul 2023 01:09:34 -0700 (PDT) Received: by mail-pf1-x429.google.com with SMTP id d2e1a72fcca58-6748a616e17so182793b3a.1 for ; Thu, 27 Jul 2023 01:09:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445320; x=1691050120; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=XXAG7UeexodYStcT1Y2gz+/6q+0E2xrK+D1h2eKApUE=; b=FYj50vEzpqpR7/JHkZvpr0BbTAfzFzYsY4J3w1nZqjf0BTlUYZg3ENXBt/E7bux565 4DCZMkbhxlQ4uTban0w+5H7n5bf7VgzCbRNW1xqy8V5Ii4h7bosDaVHN++mTVrl/7/23 WZSmzaLueVj3BrcJoWAHCGvwk4IeXhgQ2bRNwNFy4V/7BgrLzTS5YJPWuEtp82HeU9Up caVaRRGf3jcxw3YWyZv3sYid2tLZtftHEV5/wvAbdGp4oPWlqnmvAPY3i6LJ0BE1y1ID 4Y8Xa75Xt3wm60SqSMunOKTUxH6aZ+1fGysddWTaZe8OA5PjpbdliSp8jUu0Z/6yBQXn rqWA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445320; x=1691050120; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=XXAG7UeexodYStcT1Y2gz+/6q+0E2xrK+D1h2eKApUE=; b=VaBphAEa7DLzCiLR5nqtOxTalmxPFWgXtO5x82ySAHi7Kl/niDqGecKpSTiLjxBJA/ y1WU/ZLoTRsCYE7NbqiXQgT+BNGFmuHy/m45vxuYD0WL+xejPrflNF+gu2Gz7gsSlaAk zYM/f+tm941MoAcoRVPgWt6dxOmpTrCPH+bKzodJTF0OHGTwLkMcJSIWftlzpVbm85w8 JCJeNHsb1jqzaC+hFln/KDmRRhsoWx0lSkglfpbb8Rcdex241UddiQj6kQnZiiARjNOw COBNapJhlL54udF4hI9vkC7wBztqLZzFu2qANogs/SrCRhg2DgpeKPX4+4RGY0i+Fd5q lWSA== X-Gm-Message-State: ABy/qLaaz8XdK+FDRrGKr/p8ev7DqZHAmsRLTxsHHd4x82fEFPqBXH5s ypHlq7RS1wK8Hv2yuNAdy8G4rQ== X-Google-Smtp-Source: APBJJlHkKWPiTWl3kfFSQlaHJ4f9EFj8oaHZmEibAoOMDshGtR3BMo+XERT90zfJYijHcIQQmSOpWQ== X-Received: by 2002:a05:6a21:32a9:b0:136:f3ef:4d2 with SMTP id yt41-20020a056a2132a900b00136f3ef04d2mr6059155pzb.3.1690445320596; Thu, 27 Jul 2023 01:08:40 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.08.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:08:40 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v3 14/49] NFSv4.2: dynamically allocate the nfs-xattr shrinkers Date: Thu, 27 Jul 2023 16:04:27 +0800 Message-Id: <20230727080502.77895-15-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Use new APIs to dynamically allocate the nfs-xattr shrinkers. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/nfs/nfs42xattr.c | 87 +++++++++++++++++++++++---------------------- 1 file changed, 44 insertions(+), 43 deletions(-) diff --git a/fs/nfs/nfs42xattr.c b/fs/nfs/nfs42xattr.c index 911f634ba3da..2ad66a8922f4 100644 --- a/fs/nfs/nfs42xattr.c +++ b/fs/nfs/nfs42xattr.c @@ -796,28 +796,9 @@ static unsigned long nfs4_xattr_cache_scan(struct shrinker *shrink, static unsigned long nfs4_xattr_entry_scan(struct shrinker *shrink, struct shrink_control *sc); -static struct shrinker nfs4_xattr_cache_shrinker = { - .count_objects = nfs4_xattr_cache_count, - .scan_objects = nfs4_xattr_cache_scan, - .seeks = DEFAULT_SEEKS, - .flags = SHRINKER_MEMCG_AWARE, -}; - -static struct shrinker nfs4_xattr_entry_shrinker = { - .count_objects = nfs4_xattr_entry_count, - .scan_objects = nfs4_xattr_entry_scan, - .seeks = DEFAULT_SEEKS, - .batch = 512, - .flags = SHRINKER_MEMCG_AWARE, -}; - -static struct shrinker nfs4_xattr_large_entry_shrinker = { - .count_objects = nfs4_xattr_entry_count, - .scan_objects = nfs4_xattr_entry_scan, - .seeks = 1, - .batch = 512, - .flags = SHRINKER_MEMCG_AWARE, -}; +static struct shrinker *nfs4_xattr_cache_shrinker; +static struct shrinker *nfs4_xattr_entry_shrinker; +static struct shrinker *nfs4_xattr_large_entry_shrinker; static enum lru_status cache_lru_isolate(struct list_head *item, @@ -943,7 +924,7 @@ nfs4_xattr_entry_scan(struct shrinker *shrink, struct shrink_control *sc) struct nfs4_xattr_entry *entry; struct list_lru *lru; - lru = (shrink == &nfs4_xattr_large_entry_shrinker) ? + lru = (shrink == nfs4_xattr_large_entry_shrinker) ? &nfs4_xattr_large_entry_lru : &nfs4_xattr_entry_lru; freed = list_lru_shrink_walk(lru, sc, entry_lru_isolate, &dispose); @@ -971,7 +952,7 @@ nfs4_xattr_entry_count(struct shrinker *shrink, struct shrink_control *sc) unsigned long count; struct list_lru *lru; - lru = (shrink == &nfs4_xattr_large_entry_shrinker) ? + lru = (shrink == nfs4_xattr_large_entry_shrinker) ? &nfs4_xattr_large_entry_lru : &nfs4_xattr_entry_lru; count = list_lru_shrink_count(lru, sc); @@ -991,18 +972,34 @@ static void nfs4_xattr_cache_init_once(void *p) INIT_LIST_HEAD(&cache->dispose); } -static int nfs4_xattr_shrinker_init(struct shrinker *shrinker, - struct list_lru *lru, const char *name) +typedef unsigned long (*count_objects_cb)(struct shrinker *s, + struct shrink_control *sc); +typedef unsigned long (*scan_objects_cb)(struct shrinker *s, + struct shrink_control *sc); + +static int __init nfs4_xattr_shrinker_init(struct shrinker **shrinker, + struct list_lru *lru, const char *name, + count_objects_cb count, + scan_objects_cb scan, long batch, int seeks) { - int ret = 0; + int ret; - ret = register_shrinker(shrinker, name); - if (ret) + *shrinker = shrinker_alloc(SHRINKER_MEMCG_AWARE, name); + if (!*shrinker) + return -ENOMEM; + + ret = list_lru_init_memcg(lru, *shrinker); + if (ret) { + shrinker_free(*shrinker); return ret; + } - ret = list_lru_init_memcg(lru, shrinker); - if (ret) - unregister_shrinker(shrinker); + (*shrinker)->count_objects = count; + (*shrinker)->scan_objects = scan; + (*shrinker)->batch = batch; + (*shrinker)->seeks = seeks; + + shrinker_register(*shrinker); return ret; } @@ -1010,7 +1007,7 @@ static int nfs4_xattr_shrinker_init(struct shrinker *shrinker, static void nfs4_xattr_shrinker_destroy(struct shrinker *shrinker, struct list_lru *lru) { - unregister_shrinker(shrinker); + shrinker_free(shrinker); list_lru_destroy(lru); } @@ -1026,27 +1023,31 @@ int __init nfs4_xattr_cache_init(void) return -ENOMEM; ret = nfs4_xattr_shrinker_init(&nfs4_xattr_cache_shrinker, - &nfs4_xattr_cache_lru, - "nfs-xattr_cache"); + &nfs4_xattr_cache_lru, "nfs-xattr_cache", + nfs4_xattr_cache_count, + nfs4_xattr_cache_scan, 0, DEFAULT_SEEKS); if (ret) goto out1; ret = nfs4_xattr_shrinker_init(&nfs4_xattr_entry_shrinker, - &nfs4_xattr_entry_lru, - "nfs-xattr_entry"); + &nfs4_xattr_entry_lru, "nfs-xattr_entry", + nfs4_xattr_entry_count, + nfs4_xattr_entry_scan, 512, DEFAULT_SEEKS); if (ret) goto out2; ret = nfs4_xattr_shrinker_init(&nfs4_xattr_large_entry_shrinker, &nfs4_xattr_large_entry_lru, - "nfs-xattr_large_entry"); + "nfs-xattr_large_entry", + nfs4_xattr_entry_count, + nfs4_xattr_entry_scan, 512, 1); if (!ret) return 0; - nfs4_xattr_shrinker_destroy(&nfs4_xattr_entry_shrinker, + nfs4_xattr_shrinker_destroy(nfs4_xattr_entry_shrinker, &nfs4_xattr_entry_lru); out2: - nfs4_xattr_shrinker_destroy(&nfs4_xattr_cache_shrinker, + nfs4_xattr_shrinker_destroy(nfs4_xattr_cache_shrinker, &nfs4_xattr_cache_lru); out1: kmem_cache_destroy(nfs4_xattr_cache_cachep); @@ -1056,11 +1057,11 @@ int __init nfs4_xattr_cache_init(void) void nfs4_xattr_cache_exit(void) { - nfs4_xattr_shrinker_destroy(&nfs4_xattr_large_entry_shrinker, + nfs4_xattr_shrinker_destroy(nfs4_xattr_large_entry_shrinker, &nfs4_xattr_large_entry_lru); - nfs4_xattr_shrinker_destroy(&nfs4_xattr_entry_shrinker, + nfs4_xattr_shrinker_destroy(nfs4_xattr_entry_shrinker, &nfs4_xattr_entry_lru); - nfs4_xattr_shrinker_destroy(&nfs4_xattr_cache_shrinker, + nfs4_xattr_shrinker_destroy(nfs4_xattr_cache_shrinker, &nfs4_xattr_cache_lru); kmem_cache_destroy(nfs4_xattr_cache_cachep); } From patchwork Thu Jul 27 08:04:28 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329442 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 961A3C8C4 for ; Thu, 27 Jul 2023 08:14:53 +0000 (UTC) Received: from mail-pf1-f180.google.com (mail-pf1-f180.google.com [209.85.210.180]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A8BB97EFF for ; Thu, 27 Jul 2023 01:14:35 -0700 (PDT) Received: by mail-pf1-f180.google.com with SMTP id d2e1a72fcca58-66d6a9851f3so167842b3a.0 for ; Thu, 27 Jul 2023 01:14:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445332; x=1691050132; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=9TzzNXWnGUC4v0Im6lZC1fetjV0NX81rj7dQA53Eb1w=; b=fVbo4B1Sn0AGX1nNJK0Eo1gukSsful8PC6Tpi9R2ay4P+tk9frdioPsIm2s6rPxi46 ++BpYvSQrpfhaqWc0rmuBFjQPz0zzH5N+AGXb67rsChsvEkjfu687Mjmoln0lCJnbS1t S6gxfZ/pYInNuKorknrCkgDtrsNJQ+5b+KQpVkQdCPQpNRB6D3agySMM3uM99/xhPotu rAoYyPnK20sDnc7vY5XomSSW5p6ngHpl0qbTjtgeFdhf5V6H8EL0+GE/5QBEhSY2aRe8 CqIfoMbQ3ZACqieIYGVBf+Lq9zLueZGm5ISvf4EF/2FFF37Zi67sB1q+1Y4ZesHEzWZS zb1w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445332; x=1691050132; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=9TzzNXWnGUC4v0Im6lZC1fetjV0NX81rj7dQA53Eb1w=; b=WjGBXgiG/W7OqpUUsmeli2iG3zgLgDnNsXrf1OSg9p4lM4n21GAs5zOakY28ZdBQeW xpvNIFiFdp125J5PZ6lhQZ22GLRwNmVe1s7R9T3EigK3t5/41OLZHbJu3KgqB6m8gLuu yc1jQdXcjIkUu84ygi+xuOExTvFqabSIB3YkFvR6ZAjebc0IpWRUA3aDsLU9NgKKpF0U dpEl9RCu5NlAqNltezlY5ZbCAN0UXM5dEPllTmCZWStmL0d0pLNEokdYAcwPPFBsW5ez uzOIeLZeFbqS8UPs7cdiA/0Da8HnAlhyUPEZeA5p0PoQidFjboJ+xAY9mrbXvBWupHxK NDiw== X-Gm-Message-State: ABy/qLbiKJUPeJ45DmTB/FTre5L8oSq75VMAqp3u1mqKUxTMPZG27y/W KRwxbPpUzD1HbeNk7YUwUTegeA== X-Google-Smtp-Source: APBJJlFfoYzSpk6JWYRi+8IvWqqU5f15Mb/GG4zvV09auI3h1+KA8DLVYcizqJGa8aoS7uGFfDYCtA== X-Received: by 2002:a05:6a00:488e:b0:677:bb4c:c321 with SMTP id dk14-20020a056a00488e00b00677bb4cc321mr4639246pfb.0.1690445332713; Thu, 27 Jul 2023 01:08:52 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.08.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:08:52 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v3 15/49] nfs: dynamically allocate the nfs-acl shrinker Date: Thu, 27 Jul 2023 16:04:28 +0800 Message-Id: <20230727080502.77895-16-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_NONE, T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Use new APIs to dynamically allocate the nfs-acl shrinker. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/nfs/super.c | 20 ++++++++++++-------- 1 file changed, 12 insertions(+), 8 deletions(-) diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 2284f749d892..072d82e1be06 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -129,11 +129,7 @@ static void nfs_ssc_unregister_ops(void) } #endif /* CONFIG_NFS_V4_2 */ -static struct shrinker acl_shrinker = { - .count_objects = nfs_access_cache_count, - .scan_objects = nfs_access_cache_scan, - .seeks = DEFAULT_SEEKS, -}; +static struct shrinker *acl_shrinker; /* * Register the NFS filesystems @@ -153,9 +149,17 @@ int __init register_nfs_fs(void) ret = nfs_register_sysctl(); if (ret < 0) goto error_2; - ret = register_shrinker(&acl_shrinker, "nfs-acl"); - if (ret < 0) + + acl_shrinker = shrinker_alloc(0, "nfs-acl"); + if (!acl_shrinker) goto error_3; + + acl_shrinker->count_objects = nfs_access_cache_count; + acl_shrinker->scan_objects = nfs_access_cache_scan; + acl_shrinker->seeks = DEFAULT_SEEKS; + + shrinker_register(acl_shrinker); + #ifdef CONFIG_NFS_V4_2 nfs_ssc_register_ops(); #endif @@ -175,7 +179,7 @@ int __init register_nfs_fs(void) */ void __exit unregister_nfs_fs(void) { - unregister_shrinker(&acl_shrinker); + shrinker_free(acl_shrinker); nfs_unregister_sysctl(); unregister_nfs4_fs(); #ifdef CONFIG_NFS_V4_2 From patchwork Thu Jul 27 08:04:29 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329290 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 41D88D2E9 for ; Thu, 27 Jul 2023 08:10:21 +0000 (UTC) Received: from mail-pf1-x42f.google.com (mail-pf1-x42f.google.com [IPv6:2607:f8b0:4864:20::42f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3F9C959EA for ; Thu, 27 Jul 2023 01:09:58 -0700 (PDT) Received: by mail-pf1-x42f.google.com with SMTP id d2e1a72fcca58-682ae5d4184so170873b3a.1 for ; Thu, 27 Jul 2023 01:09:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445345; x=1691050145; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=XxxR7cKF9GXj8MC2HKPXqv6o5/ypcgPst5/afOqmqdU=; b=f78FOiI4CNId+Ml2PzU7mY1IxHereBLlHPf7s7X8Gy+u8ge3z2zcNtZJbXgkJ1G/QR Bypsj3Qfs4NqFk8L9OHPUra+lfok5RS+DDluwPHI9kxnAJLSgVKbtyU1LC00kLM6jzmr VkgjJJoznrUMJZqGeb8qVz0Juy94c4XL4Hr58JZjfVBDwwW2089Gloj9mnDr01+e3vie ATN8u6YkhMkKc+i92NbP56LSIJl/sZe4eRd/+9U9Zz62iXDekK8cKEfr5HTH0aUYxIkr BT13YNvigorKsMJZpm5Ugf1VrzOLWJZerOzcVEByhulhpkn1iKJBA5Dz0oLwz2cUXQdL iC6Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445345; x=1691050145; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=XxxR7cKF9GXj8MC2HKPXqv6o5/ypcgPst5/afOqmqdU=; b=EqfJA1XBPMBkLd2U01f+XXyjYFO5qYiD58vRG7FZOmc757RenAOBURi7HuiT4favhA G9qFwMrqqYbt7ymUDZIYF9K4zMVQUMAbkUcmS3UHCVj7DmFr5Fwr2PBECqr9r4cWnFT4 gLXPtS2i8u7utHwyvs4HCUko7XbDLdgDjywm1OLTa5xySP+NsYfIu6k+cQpZXc8//R9m PvgzUzzziskSVUNRkaPSiwVRD1iCDHx+YiZx+ScGX86bvqmNiRTIP7xtqqMJtUotOZN+ zxoVt4dAUuh8Yy7qDpr2th7D1VA/iAD2AKKvkeZaajoDnnCXEd7a8pT2MIQFPWppCLm3 JXjQ== X-Gm-Message-State: ABy/qLYXQX1Y19CgJJBYQ8lVCve39iasjFaNdEcF3J+vGzk1uYE8eLjx wnZq2OEcFe6AypUNXfQAcKIh4A== X-Google-Smtp-Source: APBJJlFoKDsbKkERIQGnm+LFaFeLpxhRzI1EaDrRxfTAKZLr632PKwn78Yey2tH1KRLEMSWua5HIxg== X-Received: by 2002:a05:6a00:4a10:b0:686:b990:560f with SMTP id do16-20020a056a004a1000b00686b990560fmr4379620pfb.2.1690445344746; Thu, 27 Jul 2023 01:09:04 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.08.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:09:04 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v3 16/49] nfsd: dynamically allocate the nfsd-filecache shrinker Date: Thu, 27 Jul 2023 16:04:29 +0800 Message-Id: <20230727080502.77895-17-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Use new APIs to dynamically allocate the nfsd-filecache shrinker. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/nfsd/filecache.c | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-) diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c index ee9c923192e0..872eb9501965 100644 --- a/fs/nfsd/filecache.c +++ b/fs/nfsd/filecache.c @@ -521,11 +521,7 @@ nfsd_file_lru_scan(struct shrinker *s, struct shrink_control *sc) return ret; } -static struct shrinker nfsd_file_shrinker = { - .scan_objects = nfsd_file_lru_scan, - .count_objects = nfsd_file_lru_count, - .seeks = 1, -}; +static struct shrinker *nfsd_file_shrinker; /** * nfsd_file_cond_queue - conditionally unhash and queue a nfsd_file @@ -746,12 +742,18 @@ nfsd_file_cache_init(void) goto out_err; } - ret = register_shrinker(&nfsd_file_shrinker, "nfsd-filecache"); - if (ret) { - pr_err("nfsd: failed to register nfsd_file_shrinker: %d\n", ret); + nfsd_file_shrinker = shrinker_alloc(0, "nfsd-filecache"); + if (!nfsd_file_shrinker) { + pr_err("nfsd: failed to allocate nfsd_file_shrinker\n"); goto out_lru; } + nfsd_file_shrinker->count_objects = nfsd_file_lru_count; + nfsd_file_shrinker->scan_objects = nfsd_file_lru_scan; + nfsd_file_shrinker->seeks = 1; + + shrinker_register(nfsd_file_shrinker); + ret = lease_register_notifier(&nfsd_file_lease_notifier); if (ret) { pr_err("nfsd: unable to register lease notifier: %d\n", ret); @@ -774,7 +776,7 @@ nfsd_file_cache_init(void) out_notifier: lease_unregister_notifier(&nfsd_file_lease_notifier); out_shrinker: - unregister_shrinker(&nfsd_file_shrinker); + shrinker_free(nfsd_file_shrinker); out_lru: list_lru_destroy(&nfsd_file_lru); out_err: @@ -891,7 +893,7 @@ nfsd_file_cache_shutdown(void) return; lease_unregister_notifier(&nfsd_file_lease_notifier); - unregister_shrinker(&nfsd_file_shrinker); + shrinker_free(nfsd_file_shrinker); /* * make sure all callers of nfsd_file_lru_cb are done before * calling nfsd_file_cache_purge From patchwork Thu Jul 27 08:04:30 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329291 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E14DCC8DE for ; Thu, 27 Jul 2023 08:10:34 +0000 (UTC) Received: from mail-pf1-x435.google.com (mail-pf1-x435.google.com [IPv6:2607:f8b0:4864:20::435]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CDDFB10B for ; Thu, 27 Jul 2023 01:10:13 -0700 (PDT) Received: by mail-pf1-x435.google.com with SMTP id d2e1a72fcca58-682eef7d752so203896b3a.0 for ; Thu, 27 Jul 2023 01:10:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445357; x=1691050157; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=1//FAyntSoVVhHGcFkYF5rOUv8OYZDaOr/FI52lXs1g=; b=WprFfHhwxvgCbIOGEhvz/77THpnE+uaWMbMuLLIIDpVeL3Jz2616v8wLFkzo7HZvSd TNFFTtJffBxh3fLTgZ0hA52iTzwFJ1lb7YC8GT96AcRGLEmRK6UnsPg5TF0WeT/gBbXI n3D8mngVfbe3MYXC32UZAJFJiGuaHBVIWM9CunOWIYu990kGDPAj43N4rpm3m8rpgsHd 02xW2JacWcelFq3TAnDCLUfDJo66VYYZvDcSFvyxJpg5YwEtAXcJf/FphGWJu7IrCr2v NhF0NyS2ftTWJJ0Gd6+a6tHW0SZpG4hIgkFC42XLIYM9ZEOFnWGm8ZzCwBndTMQ8KaY8 M1zg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445357; x=1691050157; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=1//FAyntSoVVhHGcFkYF5rOUv8OYZDaOr/FI52lXs1g=; b=kbbSqGK0CLndEjzkfZHW5AST2Mu7wBmawwr/MMKZji2W/hDP09oCrkKoor4GHD9cHF H6ewPMIfvmp2wWhDYuYDHILBPS44XyDFkx0P6Cqu0Rc9PzzH3QngxfXFKf8XAjBIugXV ZMEV21AynPB+gLApeKw48JADnK5LO4Av6i7xYEAU9wg8RCYyTvZeVgNo+/e+x8/CjLoF WYKNsF3Rk1Ez6VfNJFIwKxa5KbyJdY/Ypy7oOp1cKD3PGvq8fOJbgLu6VRTqoxf+GeIJ UuxHvzgByMf2rgWk11SPvK5nnvJdcjv/UWMFEF1YqCsvdufaye8i8K3GYgFGODsC0RCQ Bu/w== X-Gm-Message-State: ABy/qLZbIxv45GAeIsxiFM+2sgOf0rOwh5jlxikwsxuo/vYi83iD3oGb ZGsXWgEJjDrGhFNkEzMOmwW+8A== X-Google-Smtp-Source: APBJJlHvmYnqUEfQMupLlQUSLLnEPxVICkIYSDMBUwnFYoQAuRxCEO7ekKLA8kJr4NX0LnRrY6UJ3A== X-Received: by 2002:a05:6a00:13a3:b0:676:2a5c:7bc5 with SMTP id t35-20020a056a0013a300b006762a5c7bc5mr5229938pfg.1.1690445356761; Thu, 27 Jul 2023 01:09:16 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.09.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:09:16 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v3 17/49] quota: dynamically allocate the dquota-cache shrinker Date: Thu, 27 Jul 2023 16:04:30 +0800 Message-Id: <20230727080502.77895-18-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Use new APIs to dynamically allocate the dquota-cache shrinker. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/quota/dquot.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c index e8232242dd34..8883e6992f7c 100644 --- a/fs/quota/dquot.c +++ b/fs/quota/dquot.c @@ -791,12 +791,6 @@ dqcache_shrink_count(struct shrinker *shrink, struct shrink_control *sc) percpu_counter_read_positive(&dqstats.counter[DQST_FREE_DQUOTS])); } -static struct shrinker dqcache_shrinker = { - .count_objects = dqcache_shrink_count, - .scan_objects = dqcache_shrink_scan, - .seeks = DEFAULT_SEEKS, -}; - /* * Safely release dquot and put reference to dquot. */ @@ -2957,6 +2951,7 @@ static int __init dquot_init(void) { int i, ret; unsigned long nr_hash, order; + struct shrinker *dqcache_shrinker; printk(KERN_NOTICE "VFS: Disk quotas %s\n", __DQUOT_VERSION__); @@ -2991,8 +2986,15 @@ static int __init dquot_init(void) pr_info("VFS: Dquot-cache hash table entries: %ld (order %ld," " %ld bytes)\n", nr_hash, order, (PAGE_SIZE << order)); - if (register_shrinker(&dqcache_shrinker, "dquota-cache")) - panic("Cannot register dquot shrinker"); + dqcache_shrinker = shrinker_alloc(0, "dquota-cache"); + if (!dqcache_shrinker) + panic("Cannot allocate dquot shrinker"); + + dqcache_shrinker->count_objects = dqcache_shrink_count; + dqcache_shrinker->scan_objects = dqcache_shrink_scan; + dqcache_shrinker->seeks = DEFAULT_SEEKS; + + shrinker_register(dqcache_shrinker); return 0; } From patchwork Thu Jul 27 08:04:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329292 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 92F10FBF2 for ; Thu, 27 Jul 2023 08:10:36 +0000 (UTC) Received: from mail-pf1-x42c.google.com (mail-pf1-x42c.google.com [IPv6:2607:f8b0:4864:20::42c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3AB3EE47 for ; Thu, 27 Jul 2023 01:10:17 -0700 (PDT) Received: by mail-pf1-x42c.google.com with SMTP id d2e1a72fcca58-682ae5d4184so170934b3a.1 for ; Thu, 27 Jul 2023 01:10:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445369; x=1691050169; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=et7oKjMo2RpAm9eGe6PO8KzXkO6yMET8jj6KuxhxE1o=; b=ZArGb8yz+8ycxhYpd3TfnObsbskAktwxKp/LK6E+gx1lOsm2QqxHLjO1qFt766mx4G 4UOFzMb5rOBT3wq7QpcOo/50dqnABPqLouzBdNx69dJP3kndLHofbdJgcQSOE87tIEP3 gOFIB0th/ApJ4utKzdT3r6irRm20AGsjylo629bfexLkXBuL+hMcZdtnwSmPAtxRA7F8 l3r/R789CkvCTacsaPitu2Mn9fHBZCoAT7Xd7Py97lY3Lp4c0X3H7O8uSS1JwsanI4Cy Pf3LZprk/pnZjQej6Xzx3T3CJ+QGRGxZd7LUmSV8XGImv+0X4BPv+EIagOcfGqekhivR Bv+Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445369; x=1691050169; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=et7oKjMo2RpAm9eGe6PO8KzXkO6yMET8jj6KuxhxE1o=; b=HYcr27QgVtqKbTBn/LuOF63J1iYeepc1k+M5UsK1ipmGt6PJJMHdCpVHfM3Zx9567T 7UAuE4vsOWpsAadTZ4pUBAbjQVQ8xM+WsFrI1ULh3hekR+uK8Cs+HDPUClJH/jnLnQeS 3FX39Qbhs8qCqlD8PNUQHfS8CtyNHmI8V0QoO6SA9HXQda8I4Q05lDa4JMQsXksZYpAU uydyLp5zG+nOSSFlyzdZgOHCcBSC1ICxSiEDMbCcNVTklEeCJMXg1ph3yKt8FGRf2QeE pJRmjk7VE2+eBtsW9BPw6Et391au/NQP9vJJvs6QieD+RdKZEZC175dQdVC1qvnfIWVr edew== X-Gm-Message-State: ABy/qLY2uxMLMoTuoZ7ayuMqr2UKfVR03nUKf0p6klz7ZZ9GY1JwyNna OxzzwFmFQou0Ok36ZW8gl+WI7A== X-Google-Smtp-Source: APBJJlGUbAM65UTyBU06poLXl/mtaX6EX5YDf65AxeW9rsxnsdAR4xxA054nRzBMt6Eu4ihj5O0Oaw== X-Received: by 2002:a05:6a20:7da5:b0:137:3941:17b3 with SMTP id v37-20020a056a207da500b00137394117b3mr5573135pzj.6.1690445369382; Thu, 27 Jul 2023 01:09:29 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.09.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:09:28 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v3 18/49] ubifs: dynamically allocate the ubifs-slab shrinker Date: Thu, 27 Jul 2023 16:04:31 +0800 Message-Id: <20230727080502.77895-19-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Use new APIs to dynamically allocate the ubifs-slab shrinker. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/ubifs/super.c | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-) diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index b08fb28d16b5..c690782388a8 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -54,11 +54,7 @@ module_param_cb(default_version, &ubifs_default_version_ops, &ubifs_default_vers static struct kmem_cache *ubifs_inode_slab; /* UBIFS TNC shrinker description */ -static struct shrinker ubifs_shrinker_info = { - .scan_objects = ubifs_shrink_scan, - .count_objects = ubifs_shrink_count, - .seeks = DEFAULT_SEEKS, -}; +static struct shrinker *ubifs_shrinker_info; /** * validate_inode - validate inode. @@ -2373,7 +2369,7 @@ static void inode_slab_ctor(void *obj) static int __init ubifs_init(void) { - int err; + int err = -ENOMEM; BUILD_BUG_ON(sizeof(struct ubifs_ch) != 24); @@ -2439,10 +2435,16 @@ static int __init ubifs_init(void) if (!ubifs_inode_slab) return -ENOMEM; - err = register_shrinker(&ubifs_shrinker_info, "ubifs-slab"); - if (err) + ubifs_shrinker_info = shrinker_alloc(0, "ubifs-slab"); + if (!ubifs_shrinker_info) goto out_slab; + ubifs_shrinker_info->count_objects = ubifs_shrink_count; + ubifs_shrinker_info->scan_objects = ubifs_shrink_scan; + ubifs_shrinker_info->seeks = DEFAULT_SEEKS; + + shrinker_register(ubifs_shrinker_info); + err = ubifs_compressors_init(); if (err) goto out_shrinker; @@ -2467,7 +2469,7 @@ static int __init ubifs_init(void) dbg_debugfs_exit(); ubifs_compressors_exit(); out_shrinker: - unregister_shrinker(&ubifs_shrinker_info); + shrinker_free(ubifs_shrinker_info); out_slab: kmem_cache_destroy(ubifs_inode_slab); return err; @@ -2483,7 +2485,7 @@ static void __exit ubifs_exit(void) dbg_debugfs_exit(); ubifs_sysfs_exit(); ubifs_compressors_exit(); - unregister_shrinker(&ubifs_shrinker_info); + shrinker_free(ubifs_shrinker_info); /* * Make sure all delayed rcu free inodes are flushed before we From patchwork Thu Jul 27 08:04:32 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329293 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 93E60C8E1 for ; Thu, 27 Jul 2023 08:10:47 +0000 (UTC) Received: from mail-pf1-x434.google.com (mail-pf1-x434.google.com [IPv6:2607:f8b0:4864:20::434]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B2AC65FC9 for ; Thu, 27 Jul 2023 01:10:30 -0700 (PDT) Received: by mail-pf1-x434.google.com with SMTP id d2e1a72fcca58-66d6a9851f3so167949b3a.0 for ; Thu, 27 Jul 2023 01:10:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445381; x=1691050181; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=GSWsN00ewH1CUxuL2on0amogNZtYjpfZMPk3tXk1MLc=; b=Uigp99md2Rr3CXBoApAa/OORnqo8B1J7RivQ80kk84PuD/8/0U/wiHIiPqvPSjzBq+ 4mgkiCdsVsAk9/e2muldWgdoE75BspngFHkVey9mAlq6MnrgeN5Z2UVnZxuIj86jdS6R rAWjfbsFjXDEfm8YOidjdqca7DNptBkelH0HrT7nXcdFtSlvKmDtxqUQOqWjbYzyZulg AN7Mzxd848XhJE6ClueXrvuJZWX5X85+XT80LyTl5276AdX2DnTvKQaDsxfVQAKr1XxX WaB1fRqts+Skr4BpFNBdK0X00kCFzaVEUe4nziyxeBmy6RtpnTKoOQLFGVCxxQosoZyC 4x+w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445381; x=1691050181; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=GSWsN00ewH1CUxuL2on0amogNZtYjpfZMPk3tXk1MLc=; b=YEmA2kWNluYqNj2wx6y0DCDszTGhYsS7Agha91bGp8SvsmJlyiC1RtHZ2D45QkJnz1 6evqP0r83N5mSnx+8UTMhessDvAEeSNrEw92q01AaA2L2DAtHWWRgO4vpWBzU5sLdEJB N7IXb1BhK2MabjBXT0Go3m3qCYudmdABVksvMGhmGVjhH/smMb9yQlDpjYnHFqszfIRe OiY+lp0CU1AbWYOO5MH5xHce1pt1vTpLOITWWC20amVaR/ziFU85a4n2WeATQxQWOFvH HQBshce9EJr/Ze/lX/PsTTv5lKQe/kDVdR3u3tbOFCWcUzuvw1nxPF9T19CDQ0yde9tq PILw== X-Gm-Message-State: ABy/qLaUVe2SfChUt3xqmgNqmNEyqgX0/Tq7Wt3LbB772pj1+CLljOSP th6NjColpmfLov7fTMYxZa6grA== X-Google-Smtp-Source: APBJJlHVjyqYSo1ak3Z7chV1yhtxMPzG2+b/e8BLYdWQhXdIbtZlkhi04HlfYJAG9z5TWY/X++2RBQ== X-Received: by 2002:a05:6a20:729a:b0:100:b92b:e8be with SMTP id o26-20020a056a20729a00b00100b92be8bemr5576237pzk.2.1690445381598; Thu, 27 Jul 2023 01:09:41 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.09.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:09:41 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH v3 19/49] rcu: dynamically allocate the rcu-lazy shrinker Date: Thu, 27 Jul 2023 16:04:32 +0800 Message-Id: <20230727080502.77895-20-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Use new APIs to dynamically allocate the rcu-lazy shrinker. Signed-off-by: Qi Zheng --- kernel/rcu/tree_nocb.h | 20 +++++++++++--------- 1 file changed, 11 insertions(+), 9 deletions(-) diff --git a/kernel/rcu/tree_nocb.h b/kernel/rcu/tree_nocb.h index 5598212d1f27..e1c59c33738a 100644 --- a/kernel/rcu/tree_nocb.h +++ b/kernel/rcu/tree_nocb.h @@ -1396,13 +1396,6 @@ lazy_rcu_shrink_scan(struct shrinker *shrink, struct shrink_control *sc) return count ? count : SHRINK_STOP; } - -static struct shrinker lazy_rcu_shrinker = { - .count_objects = lazy_rcu_shrink_count, - .scan_objects = lazy_rcu_shrink_scan, - .batch = 0, - .seeks = DEFAULT_SEEKS, -}; #endif // #ifdef CONFIG_RCU_LAZY void __init rcu_init_nohz(void) @@ -1410,6 +1403,7 @@ void __init rcu_init_nohz(void) int cpu; struct rcu_data *rdp; const struct cpumask *cpumask = NULL; + struct shrinker * __maybe_unused lazy_rcu_shrinker; #if defined(CONFIG_NO_HZ_FULL) if (tick_nohz_full_running && !cpumask_empty(tick_nohz_full_mask)) @@ -1436,8 +1430,16 @@ void __init rcu_init_nohz(void) return; #ifdef CONFIG_RCU_LAZY - if (register_shrinker(&lazy_rcu_shrinker, "rcu-lazy")) - pr_err("Failed to register lazy_rcu shrinker!\n"); + lazy_rcu_shrinker = shrinker_alloc(0, "rcu-lazy"); + if (!lazy_rcu_shrinker) { + pr_err("Failed to allocate lazy_rcu shrinker!\n"); + } else { + lazy_rcu_shrinker->count_objects = lazy_rcu_shrink_count; + lazy_rcu_shrinker->scan_objects = lazy_rcu_shrink_scan; + lazy_rcu_shrinker->seeks = DEFAULT_SEEKS; + + shrinker_register(lazy_rcu_shrinker); + } #endif // #ifdef CONFIG_RCU_LAZY if (!cpumask_subset(rcu_nocb_mask, cpu_possible_mask)) { From patchwork Thu Jul 27 08:04:33 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329294 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4BC7DC8DC for ; Thu, 27 Jul 2023 08:10:52 +0000 (UTC) Received: from mail-pf1-x430.google.com (mail-pf1-x430.google.com [IPv6:2607:f8b0:4864:20::430]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 46DF45FE5 for ; Thu, 27 Jul 2023 01:10:34 -0700 (PDT) Received: by mail-pf1-x430.google.com with SMTP id d2e1a72fcca58-686f6231bdeso113077b3a.1 for ; Thu, 27 Jul 2023 01:10:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445393; x=1691050193; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=YHU8OaKZwBmHAPsd+ulZSL5GxfVyMtJ49ZlHBntG+/k=; b=Ws66ywmifmcLi+WS7kmIq1OGsH1BFTj57lSknLEKHfbjZoq0FCk32P7hFix2O77y/C 4VExY7boGbko1TLXa8rf04m6+c8ScNg+Ye07GBCAr/bT75kG0yI8bdxHraEPkF+rcUYR 8BmftTtO1b4i7ZeslsgPT7KHdxn3xY8ziOGXEmWj+FzniwFS8tNvAxdGJbvq/4djXF38 gQDVTQD96XEDgWvn9v9d4yLEL0qbZzBxPnvHBbbs4StP2CGFCs0AHk/pzAfhLwFN3LYv MATNwQY8c4ti2yb34XlOR1fjl5eoQUN5qPDBlkMol6h4RrCuQdh3qGqhSkTUZQAnG9Jo zXhA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445393; x=1691050193; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=YHU8OaKZwBmHAPsd+ulZSL5GxfVyMtJ49ZlHBntG+/k=; b=Sm2tyVKsxQubOrSsWTDpY7f9mwIyAxP7vyh99qRBjfO9eyzSZKwqjYD6n+Lf6G5fbV dD1eGOFb5Zmhw7vuzHBLjW7R4GsFdYdBT2RZG2QQ0zCSktWJWksKSkRGkIQTI3reFlzJ jqus9gWoVk/sDodPJLU70AM9SkX3ieZR10AugUt/BWwTOuqhn3S/drd9tOaTX3DuKANW R9LryerQ/JTsMmwhfR4BRiYKF+VwIAv4yU5pwYZC06ihKRDlOyIH1cgDnJ/ZC1vbw0l5 PZoW8xTwqpzhGe1ErlyXocvg2pvJvfUpAHCqxoHOARef6Skkof9XDSyXRMKhCB5cs2to V2bw== X-Gm-Message-State: ABy/qLaWnPtt2ZL+3stYdkHtmAAvQsTj4NBfa7QWuebRqq30fD5B+i5V EnTkGfxG3jE2ZgOF4pojwsJCmw== X-Google-Smtp-Source: APBJJlFl46sZLt7x9x1yarGXcrDY9BzfubiI/ML/2A4f5iYMwILGEdxBDjTGuKdYIeQS2k9MfMDqhg== X-Received: by 2002:a05:6a00:4a0e:b0:677:3439:874a with SMTP id do14-20020a056a004a0e00b006773439874amr5199798pfb.3.1690445393467; Thu, 27 Jul 2023 01:09:53 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.09.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:09:53 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH v3 20/49] rcu: dynamically allocate the rcu-kfree shrinker Date: Thu, 27 Jul 2023 16:04:33 +0800 Message-Id: <20230727080502.77895-21-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Use new APIs to dynamically allocate the rcu-kfree shrinker. Signed-off-by: Qi Zheng --- kernel/rcu/tree.c | 22 +++++++++++++--------- 1 file changed, 13 insertions(+), 9 deletions(-) diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index cb1caefa8bd0..6d2f82f79c65 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -3449,13 +3449,6 @@ kfree_rcu_shrink_scan(struct shrinker *shrink, struct shrink_control *sc) return freed == 0 ? SHRINK_STOP : freed; } -static struct shrinker kfree_rcu_shrinker = { - .count_objects = kfree_rcu_shrink_count, - .scan_objects = kfree_rcu_shrink_scan, - .batch = 0, - .seeks = DEFAULT_SEEKS, -}; - void __init kfree_rcu_scheduler_running(void) { int cpu; @@ -4931,6 +4924,7 @@ static void __init kfree_rcu_batch_init(void) { int cpu; int i, j; + struct shrinker *kfree_rcu_shrinker; /* Clamp it to [0:100] seconds interval. */ if (rcu_delay_page_cache_fill_msec < 0 || @@ -4962,8 +4956,18 @@ static void __init kfree_rcu_batch_init(void) INIT_DELAYED_WORK(&krcp->page_cache_work, fill_page_cache_func); krcp->initialized = true; } - if (register_shrinker(&kfree_rcu_shrinker, "rcu-kfree")) - pr_err("Failed to register kfree_rcu() shrinker!\n"); + + kfree_rcu_shrinker = shrinker_alloc(0, "rcu-kfree"); + if (!kfree_rcu_shrinker) { + pr_err("Failed to allocate kfree_rcu() shrinker!\n"); + return; + } + + kfree_rcu_shrinker->count_objects = kfree_rcu_shrink_count; + kfree_rcu_shrinker->scan_objects = kfree_rcu_shrink_scan; + kfree_rcu_shrinker->seeks = DEFAULT_SEEKS; + + shrinker_register(kfree_rcu_shrinker); } void __init rcu_init(void) From patchwork Thu Jul 27 08:04:34 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329295 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 77325C8DC for ; Thu, 27 Jul 2023 08:11:11 +0000 (UTC) Received: from mail-pf1-x435.google.com (mail-pf1-x435.google.com [IPv6:2607:f8b0:4864:20::435]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4EB0665B8 for ; Thu, 27 Jul 2023 01:10:49 -0700 (PDT) Received: by mail-pf1-x435.google.com with SMTP id d2e1a72fcca58-6748a616e17so183068b3a.1 for ; Thu, 27 Jul 2023 01:10:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445405; x=1691050205; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=zAZIQD5LE19JLWIPx8KiiULhQHk9tWBr8sqfFcta/MI=; b=NqYwP+7q26BX+05EQAE55Kus0VTZ4uDrn8hA+JsQeQZJT9fqe02P3PtEqTbWL+ex0x YIFFlprB9LN8XpWOyzBWvs6bF2o1el7zRiKvHm2Vd5z2Or8QA2PiX1E8ylBDH7Szeeh9 /iQcvqB1l/KdO3epgECrqpXSIR/s/RJamq92lbZYEsjapR5/FUExLIHgiZunap4eHVCx zA39TmQ89NL3AupWiP9iOshQQO6k89rLp1YMDCuDF8tqw1FNGVEm51b05cxcsW4A6ycO oxBBen2ORAG64Kh5EsfwftGMbRswk1n9HcylImCxbc9GAVmkCHyiC5Q0TKVbaeRFnqta TxEw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445405; x=1691050205; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=zAZIQD5LE19JLWIPx8KiiULhQHk9tWBr8sqfFcta/MI=; b=a+KN/RfBDOf4JnqWFqG5gTLKsZwf1iez8MfnEv0SkT17IDBS4CZzaaj9hfCHJBN8fh sdMy5OFi7Oln+jtI1xNrOplb77YJBuRGNwmwR4KqZcx2tZShiMYJmmjuwWcpIrzJrbAl qJFykqt3hzcVsGcZxpG+cCNyf7quYsZlwMSWXHzwx/nb+cxFVY2thhLCa36FCVCLGzmB SXEhv8ZRiUtof+69Nevbj5vxzrlq8CBQHjKgUQFWl+q58lvFJICYsWdEgxeTHENEZcKB ttx38HSBmSbdUnT0QlSZEtyehvGHmJ/0ELgpPLNJ/nNoiaHXrqUbqtLcCcvVLQbip7M2 /RUw== X-Gm-Message-State: ABy/qLYVCq9CckwpdanqYldJ5B2dosYrQfT1GapmWRMSg6PwRo+CAIFU RQOF8FQFGerOJecgT5k7WbmwwA== X-Google-Smtp-Source: APBJJlGpZH0OiKzZvwM26WklEwoVdvnyU6bL6rc8uFjIqbOYU7fWKIX23eNXK117O9K5uschqUp2Jg== X-Received: by 2002:a05:6a00:4a83:b0:679:a1f1:a5f8 with SMTP id dr3-20020a056a004a8300b00679a1f1a5f8mr4623296pfb.3.1690445405268; Thu, 27 Jul 2023 01:10:05 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.09.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:10:04 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH v3 21/49] mm: thp: dynamically allocate the thp-related shrinkers Date: Thu, 27 Jul 2023 16:04:34 +0800 Message-Id: <20230727080502.77895-22-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Use new APIs to dynamically allocate the thp-zero and thp-deferred_split shrinkers. Signed-off-by: Qi Zheng --- mm/huge_memory.c | 69 +++++++++++++++++++++++++++++++----------------- 1 file changed, 45 insertions(+), 24 deletions(-) diff --git a/mm/huge_memory.c b/mm/huge_memory.c index e371503f7746..a0dbb55b4913 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -65,7 +65,11 @@ unsigned long transparent_hugepage_flags __read_mostly = (1<count_objects = shrink_huge_zero_page_count; + huge_zero_page_shrinker->scan_objects = shrink_huge_zero_page_scan; + huge_zero_page_shrinker->seeks = DEFAULT_SEEKS; + shrinker_register(huge_zero_page_shrinker); + + deferred_split_shrinker->count_objects = deferred_split_count; + deferred_split_shrinker->scan_objects = deferred_split_scan; + deferred_split_shrinker->seeks = DEFAULT_SEEKS; + shrinker_register(deferred_split_shrinker); + + return 0; +} + +static void __init thp_shrinker_exit(void) +{ + shrinker_free(huge_zero_page_shrinker); + shrinker_free(deferred_split_shrinker); +} + static int __init hugepage_init(void) { int err; @@ -482,12 +516,9 @@ static int __init hugepage_init(void) if (err) goto err_slab; - err = register_shrinker(&huge_zero_page_shrinker, "thp-zero"); - if (err) - goto err_hzp_shrinker; - err = register_shrinker(&deferred_split_shrinker, "thp-deferred_split"); + err = thp_shrinker_init(); if (err) - goto err_split_shrinker; + goto err_shrinker; /* * By default disable transparent hugepages on smaller systems, @@ -505,10 +536,8 @@ static int __init hugepage_init(void) return 0; err_khugepaged: - unregister_shrinker(&deferred_split_shrinker); -err_split_shrinker: - unregister_shrinker(&huge_zero_page_shrinker); -err_hzp_shrinker: + thp_shrinker_exit(); +err_shrinker: khugepaged_destroy(); err_slab: hugepage_exit_sysfs(hugepage_kobj); @@ -2833,7 +2862,7 @@ void deferred_split_folio(struct folio *folio) #ifdef CONFIG_MEMCG if (memcg) set_shrinker_bit(memcg, folio_nid(folio), - deferred_split_shrinker.id); + deferred_split_shrinker->id); #endif } spin_unlock_irqrestore(&ds_queue->split_queue_lock, flags); @@ -2907,14 +2936,6 @@ static unsigned long deferred_split_scan(struct shrinker *shrink, return split; } -static struct shrinker deferred_split_shrinker = { - .count_objects = deferred_split_count, - .scan_objects = deferred_split_scan, - .seeks = DEFAULT_SEEKS, - .flags = SHRINKER_NUMA_AWARE | SHRINKER_MEMCG_AWARE | - SHRINKER_NONSLAB, -}; - #ifdef CONFIG_DEBUG_FS static void split_huge_pages_all(void) { From patchwork Thu Jul 27 08:04:35 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329296 X-Patchwork-Delegate: kuba@kernel.org Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 98F1DFC17 for ; Thu, 27 Jul 2023 08:11:17 +0000 (UTC) Received: from mail-pf1-x432.google.com (mail-pf1-x432.google.com [IPv6:2607:f8b0:4864:20::432]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1065549E4 for ; Thu, 27 Jul 2023 01:10:55 -0700 (PDT) Received: by mail-pf1-x432.google.com with SMTP id d2e1a72fcca58-686f74a8992so77852b3a.1 for ; Thu, 27 Jul 2023 01:10:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445417; x=1691050217; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=PYuXWIGRd3SDQUNwBNnDU/RFUGkEJd0z6ud/pRWhp58=; b=T9ifvBS7grSXMXHZ+aFeKzum6pF3H2DhLFdohTJRx7vF7szcBG6tJ5VPINqCVu3pCX FmubTvt88b5ysMWaYtFibatbXMnoo6Jib8lbo65gbMoj4iY6HbdoFrEeXgYSqYC9Jqe0 PGHsLAS4RpAPQjTV72r0GtDUpuZ/ybvTZ9EZC90EXosh65ardfAALzeVYgFduHUdYxNh uE3GuwKiv2CyHXolQ3XZqpbE7oSyCW4E0iZzkXVJZoTlkXjievgPAGhg1+Kv8s/E0hIi dyIaavdNWwWhQNwuCKJwqWG502/DMJOkmwjObTrka2ckcmNrtUCmvsEGY2FZ9fmQFWZZ aE4g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445417; x=1691050217; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=PYuXWIGRd3SDQUNwBNnDU/RFUGkEJd0z6ud/pRWhp58=; b=be9oIbCfl2nEbhRUxptA1Rj/tiDUXyrJqgSCFl4+LpgmMjDuCmeVbiBWH6qCMOVBeD 7J4ktvw9KXLSz6l9tLcsmFtb77H/hVqOb/pCGILV/bcdd8Djq02BKsSyYFpsLH3tCNvT ZQYY109ihw8iRXtGtFSY9m+//SR7pwLw+rjDlP1s4xiywivt9St55EU5i2FLYaZ9/i9B QaBgR8sFKGwH2VnyinoKADFBTMljhhKntcyckeotgZdmaP3baVgIfvDCJEqLJOXwhJy2 SEoqALl2V2GULRRgqngSfKF5nRZaOYhg0Shi+jsB6VuvzwgUL6IpbEZGBX99/Tu5rDUd LiHA== X-Gm-Message-State: ABy/qLZbzHRUGzius4C4m80ncSu6Z4UcycbvLsgQwOfIJoydfySq7zje GSXAr4uGjrrwpHDKaZPvBJAdWw== X-Google-Smtp-Source: APBJJlFP1iLC566NPrkWwKL0iKI9L1P+4s+IlmNKaBmXVe5HE8WAAvDQ5uBELCFt4/l7YPuEeyQdfQ== X-Received: by 2002:a05:6a21:7882:b0:123:3ec2:360d with SMTP id bf2-20020a056a21788200b001233ec2360dmr5970181pzc.5.1690445417252; Thu, 27 Jul 2023 01:10:17 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.10.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:10:16 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v3 22/49] sunrpc: dynamically allocate the sunrpc_cred shrinker Date: Thu, 27 Jul 2023 16:04:35 +0800 Message-Id: <20230727080502.77895-23-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net X-Patchwork-Delegate: kuba@kernel.org Use new APIs to dynamically allocate the sunrpc_cred shrinker. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- net/sunrpc/auth.c | 19 +++++++++++-------- 1 file changed, 11 insertions(+), 8 deletions(-) diff --git a/net/sunrpc/auth.c b/net/sunrpc/auth.c index 2f16f9d17966..6b898b1be6f5 100644 --- a/net/sunrpc/auth.c +++ b/net/sunrpc/auth.c @@ -861,11 +861,7 @@ rpcauth_uptodatecred(struct rpc_task *task) test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) != 0; } -static struct shrinker rpc_cred_shrinker = { - .count_objects = rpcauth_cache_shrink_count, - .scan_objects = rpcauth_cache_shrink_scan, - .seeks = DEFAULT_SEEKS, -}; +static struct shrinker *rpc_cred_shrinker; int __init rpcauth_init_module(void) { @@ -874,9 +870,16 @@ int __init rpcauth_init_module(void) err = rpc_init_authunix(); if (err < 0) goto out1; - err = register_shrinker(&rpc_cred_shrinker, "sunrpc_cred"); - if (err < 0) + rpc_cred_shrinker = shrinker_alloc(0, "sunrpc_cred"); + if (!rpc_cred_shrinker) goto out2; + + rpc_cred_shrinker->count_objects = rpcauth_cache_shrink_count; + rpc_cred_shrinker->scan_objects = rpcauth_cache_shrink_scan; + rpc_cred_shrinker->seeks = DEFAULT_SEEKS; + + shrinker_register(rpc_cred_shrinker); + return 0; out2: rpc_destroy_authunix(); @@ -887,5 +890,5 @@ int __init rpcauth_init_module(void) void rpcauth_remove_module(void) { rpc_destroy_authunix(); - unregister_shrinker(&rpc_cred_shrinker); + shrinker_free(rpc_cred_shrinker); } From patchwork Thu Jul 27 08:04:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329297 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E79C4FC17 for ; Thu, 27 Jul 2023 08:11:22 +0000 (UTC) Received: from mail-pf1-x42c.google.com (mail-pf1-x42c.google.com [IPv6:2607:f8b0:4864:20::42c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AA8A55FC7 for ; Thu, 27 Jul 2023 01:11:01 -0700 (PDT) Received: by mail-pf1-x42c.google.com with SMTP id d2e1a72fcca58-686f74a8992so77891b3a.1 for ; Thu, 27 Jul 2023 01:11:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445429; x=1691050229; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=uDu/4z0sff3MNLq2Hem41DvJLtW9HR7Ht2OY0+o3IBw=; b=iVGfsyXkMcKNuSj4S4+ETT1e5FnNKRSLwcupS7aKQrOa2P/cg11EPb/fa7MepSVN0c souD70V3XZBCWCF1GY2G8kOBoazYK/GwCZP5iJVITEwRi2CFhPhtCnmN6NHRYDRfscjM ei11bn/3SqGlS2cI+uWxsIZ60GgV8/Th1+KRHAcGdOM/vcClXnAdg9IcKu5dXKtmCkaz 1Uv1368bMlurEfH1GvebpNgAfjlYTQWl+OVWRYv+SAitVhKYxMqk7I6vstlqXAV5ZTFg 13mCns35aGRuj+msRJnkqY3lYp1C9AqbhcZNDVttxslcFzKIxthPN+0g8mDIqHh31rTQ XhNA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445429; x=1691050229; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=uDu/4z0sff3MNLq2Hem41DvJLtW9HR7Ht2OY0+o3IBw=; b=aJMzL0bBlCQyqdyw613mBKWwyDFMSnvv8DZ3Tjt6cll4j5hNZISpnifTmh+Ctp+dKN Eo88S1sJaKu2c02GODZIuwmbDH+oZjWzZJOrtpFAXupmM0O6dsRlLjvfUAExCeYBEhAc q/8COf+85/+oRhpXQL1t7VHRG0ErarxQpNhyZ5aWcNW8GirpEYsV+WgtFCi8K0XVgg3d Qt/XBBthxbwgSH9kjnrDplxhn8n/7qmpo9KS0VcQmaTmEpBHYzu7hbqRC+oVAmLEBM8M j1VpHgfw5A47zKZaZbDIsr+m1zONLR/Yrw/vxw2Yrf+DqBbqDmYiYg9frapeM1aAKDEE TxqQ== X-Gm-Message-State: ABy/qLZmZo+FL02RwctubNPPt60+TvDsnWHZ8l5XWHKs/DrPrpjnn3ly CSafrNwBE8huB5Ucjd+CjFWloA== X-Google-Smtp-Source: APBJJlHGswV8UzzwdSNooBFOlXCa2QxTNwcJjWEIeOA/B6KtVME+e61/tgitLanHgBraDSTbcyHPAw== X-Received: by 2002:a05:6a20:1595:b0:137:30db:bc1e with SMTP id h21-20020a056a20159500b0013730dbbc1emr5696433pzj.3.1690445429121; Thu, 27 Jul 2023 01:10:29 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.10.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:10:28 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH v3 23/49] mm: workingset: dynamically allocate the mm-shadow shrinker Date: Thu, 27 Jul 2023 16:04:36 +0800 Message-Id: <20230727080502.77895-24-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Use new APIs to dynamically allocate the mm-shadow shrinker. Signed-off-by: Qi Zheng --- mm/workingset.c | 27 ++++++++++++++------------- 1 file changed, 14 insertions(+), 13 deletions(-) diff --git a/mm/workingset.c b/mm/workingset.c index da58a26d0d4d..3c53138903a7 100644 --- a/mm/workingset.c +++ b/mm/workingset.c @@ -763,13 +763,6 @@ static unsigned long scan_shadow_nodes(struct shrinker *shrinker, NULL); } -static struct shrinker workingset_shadow_shrinker = { - .count_objects = count_shadow_nodes, - .scan_objects = scan_shadow_nodes, - .seeks = 0, /* ->count reports only fully expendable nodes */ - .flags = SHRINKER_NUMA_AWARE | SHRINKER_MEMCG_AWARE, -}; - /* * Our list_lru->lock is IRQ-safe as it nests inside the IRQ-safe * i_pages lock. @@ -778,9 +771,10 @@ static struct lock_class_key shadow_nodes_key; static int __init workingset_init(void) { + struct shrinker *workingset_shadow_shrinker; unsigned int timestamp_bits; unsigned int max_order; - int ret; + int ret = -ENOMEM; BUILD_BUG_ON(BITS_PER_LONG < EVICTION_SHIFT); /* @@ -797,17 +791,24 @@ static int __init workingset_init(void) pr_info("workingset: timestamp_bits=%d max_order=%d bucket_order=%u\n", timestamp_bits, max_order, bucket_order); - ret = prealloc_shrinker(&workingset_shadow_shrinker, "mm-shadow"); - if (ret) + workingset_shadow_shrinker = shrinker_alloc(SHRINKER_NUMA_AWARE | + SHRINKER_MEMCG_AWARE, + "mm-shadow"); + if (!workingset_shadow_shrinker) goto err; + ret = __list_lru_init(&shadow_nodes, true, &shadow_nodes_key, - &workingset_shadow_shrinker); + workingset_shadow_shrinker); if (ret) goto err_list_lru; - register_shrinker_prepared(&workingset_shadow_shrinker); + + workingset_shadow_shrinker->count_objects = count_shadow_nodes; + workingset_shadow_shrinker->scan_objects = scan_shadow_nodes; + + shrinker_register(workingset_shadow_shrinker); return 0; err_list_lru: - free_prealloced_shrinker(&workingset_shadow_shrinker); + shrinker_free(workingset_shadow_shrinker); err: return ret; } From patchwork Thu Jul 27 08:04:37 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329298 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 021D1C8F3 for ; Thu, 27 Jul 2023 08:11:32 +0000 (UTC) Received: from mail-pf1-x42c.google.com (mail-pf1-x42c.google.com [IPv6:2607:f8b0:4864:20::42c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A61026A75 for ; Thu, 27 Jul 2023 01:11:12 -0700 (PDT) Received: by mail-pf1-x42c.google.com with SMTP id d2e1a72fcca58-682b1768a0bso175216b3a.0 for ; Thu, 27 Jul 2023 01:11:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445441; x=1691050241; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=41xmtjHXWdMgLIKiQIRlxv7trVO9ZOyoGRN9dVMIVRc=; b=jJgBI8VQPI/Z/ccNdZLQtiBsmt12TPxNxcyEmmLc3cIOt24zWvO/St4DfrzxY5Admf 3SDYEYmgqkbX/HCmKk1mhlFmceeqU6DbMAGX6sKGDtq8kQ9lxaCqTKXpNvB2geQpeb/h vsR6q4NMVpErQyh+gExoRBpaWXOpdpMQoCMJklMeKJXld9SnNAjyhQYKrvvJBu4rqMJ/ BskSxQtm7+yyLnANci339dgBsgl+QpehmZaSNibUdDIkrrPM4ocpVsZrOOzcHGIll593 Cyr5YWDE/4EhF6WmCmYK5tukhzqSpwAn7rBK0/njtLGQr3gzTYmZeQalMU7Drn0Ngg3k gxSA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445441; x=1691050241; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=41xmtjHXWdMgLIKiQIRlxv7trVO9ZOyoGRN9dVMIVRc=; b=XElNGyvZ2k/hUtGNCgAuortA1ueaOL74mrIpguQAiEPB27aqIxZ4QV3FCJXY2dM4hN j84YRi+kIyDKH4NKGhKW8nJC1aucx5oGGJo5HizxBSFqmHX41pqqtijZJsUAlrcfrECY kaBXUV0jqcdjcZA6VwpLYCYYlo4tA4ragRPETejWAeKc8hEqwA7neBTfAjclfcICG6Rw M7OFpY6uhVMfvCKGi4UUth8UJrUnQS/wV0XcVCqtTO9EwG8+Qi9TK8RZHmxvB4Ca/J8Y pC47pnjMw6+wP0lzn13L5DEWGTVHxmA70z8JFTaGdNoXMFk9AEkodT0TAOmziRw3TNhU RY9A== X-Gm-Message-State: ABy/qLb54U9K6zuxrdWKvrQTzum9OukjJ6ZAcwsKy8Rsft469jbAGUyd 5d43XK1SSYExxHcj4W4oPN3HDQ== X-Google-Smtp-Source: APBJJlFv8o3eRUEIkT8KpumLsadZadNPzVgwQnm8JqI4lPxEdXnFu9DFIlRiQ246ApgsoZodQYjNqA== X-Received: by 2002:a05:6a20:1590:b0:137:4fd0:e2e1 with SMTP id h16-20020a056a20159000b001374fd0e2e1mr5901952pzj.4.1690445441148; Thu, 27 Jul 2023 01:10:41 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.10.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:10:40 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v3 24/49] drm/i915: dynamically allocate the i915_gem_mm shrinker Date: Thu, 27 Jul 2023 16:04:37 +0800 Message-Id: <20230727080502.77895-25-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the i915_gem_mm shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct drm_i915_private. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- drivers/gpu/drm/i915/gem/i915_gem_shrinker.c | 30 +++++++++++--------- drivers/gpu/drm/i915/i915_drv.h | 2 +- 2 files changed, 18 insertions(+), 14 deletions(-) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_shrinker.c b/drivers/gpu/drm/i915/gem/i915_gem_shrinker.c index 214763942aa2..4504eb4f31d5 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_shrinker.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_shrinker.c @@ -284,8 +284,7 @@ unsigned long i915_gem_shrink_all(struct drm_i915_private *i915) static unsigned long i915_gem_shrinker_count(struct shrinker *shrinker, struct shrink_control *sc) { - struct drm_i915_private *i915 = - container_of(shrinker, struct drm_i915_private, mm.shrinker); + struct drm_i915_private *i915 = shrinker->private_data; unsigned long num_objects; unsigned long count; @@ -302,8 +301,8 @@ i915_gem_shrinker_count(struct shrinker *shrinker, struct shrink_control *sc) if (num_objects) { unsigned long avg = 2 * count / num_objects; - i915->mm.shrinker.batch = - max((i915->mm.shrinker.batch + avg) >> 1, + i915->mm.shrinker->batch = + max((i915->mm.shrinker->batch + avg) >> 1, 128ul /* default SHRINK_BATCH */); } @@ -313,8 +312,7 @@ i915_gem_shrinker_count(struct shrinker *shrinker, struct shrink_control *sc) static unsigned long i915_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc) { - struct drm_i915_private *i915 = - container_of(shrinker, struct drm_i915_private, mm.shrinker); + struct drm_i915_private *i915 = shrinker->private_data; unsigned long freed; sc->nr_scanned = 0; @@ -422,12 +420,18 @@ i915_gem_shrinker_vmap(struct notifier_block *nb, unsigned long event, void *ptr void i915_gem_driver_register__shrinker(struct drm_i915_private *i915) { - i915->mm.shrinker.scan_objects = i915_gem_shrinker_scan; - i915->mm.shrinker.count_objects = i915_gem_shrinker_count; - i915->mm.shrinker.seeks = DEFAULT_SEEKS; - i915->mm.shrinker.batch = 4096; - drm_WARN_ON(&i915->drm, register_shrinker(&i915->mm.shrinker, - "drm-i915_gem")); + i915->mm.shrinker = shrinker_alloc(0, "drm-i915_gem"); + if (!i915->mm.shrinker) { + drm_WARN_ON(&i915->drm, 1); + } else { + i915->mm.shrinker->scan_objects = i915_gem_shrinker_scan; + i915->mm.shrinker->count_objects = i915_gem_shrinker_count; + i915->mm.shrinker->seeks = DEFAULT_SEEKS; + i915->mm.shrinker->batch = 4096; + i915->mm.shrinker->private_data = i915; + + shrinker_register(i915->mm.shrinker); + } i915->mm.oom_notifier.notifier_call = i915_gem_shrinker_oom; drm_WARN_ON(&i915->drm, register_oom_notifier(&i915->mm.oom_notifier)); @@ -443,7 +447,7 @@ void i915_gem_driver_unregister__shrinker(struct drm_i915_private *i915) unregister_vmap_purge_notifier(&i915->mm.vmap_notifier)); drm_WARN_ON(&i915->drm, unregister_oom_notifier(&i915->mm.oom_notifier)); - unregister_shrinker(&i915->mm.shrinker); + shrinker_free(i915->mm.shrinker); } void i915_gem_shrinker_taints_mutex(struct drm_i915_private *i915, diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 682ef2b5c7d5..389e8bf140d7 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -163,7 +163,7 @@ struct i915_gem_mm { struct notifier_block oom_notifier; struct notifier_block vmap_notifier; - struct shrinker shrinker; + struct shrinker *shrinker; #ifdef CONFIG_MMU_NOTIFIER /** From patchwork Thu Jul 27 08:04:38 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329299 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4A5801079B for ; Thu, 27 Jul 2023 08:11:44 +0000 (UTC) Received: from mail-pf1-x434.google.com (mail-pf1-x434.google.com [IPv6:2607:f8b0:4864:20::434]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 18B9B6EB5 for ; Thu, 27 Jul 2023 01:11:24 -0700 (PDT) Received: by mail-pf1-x434.google.com with SMTP id d2e1a72fcca58-682eef7d752so204310b3a.0 for ; Thu, 27 Jul 2023 01:11:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445453; x=1691050253; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=Tu9w5C30y8MI/napZavPwFZ6nIJBEFlaB1CCEG9BfCw=; b=SsnsAPan45QSmQpJqAj4mS8LLavDombkZ7lBafLri7RggDFTDcpBOPuNyPBGUpCtjr o6WPy8R5HZiwm+Xan4YH//v4pvtUrfeXD65Yl1az+1fl+mR3tGlsBglM3Vyq8SiK2wyq igQhG5qCvspbkK2WSeD0wTcUc/mVkzohC4cNnc0XbtmIoWLvLOUFPW/6keJGSZm27mRz h/WfB+fRpcVUE83zuhvMF8jYZ5b4nmh/qAHVpz3lROeGSQfLjlNrgG+gcbPX1nT5Mc7l SChQ2Lyx0ddDcRFnW8nA/XTZimbKDOI/X2WL7QqkejXsVeMe1ddjPlvbW0l5uaRLNo6A kpeA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445453; x=1691050253; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=Tu9w5C30y8MI/napZavPwFZ6nIJBEFlaB1CCEG9BfCw=; b=AaPt/oLM15XXSdcer8EJ/TRpfQwe9+RqH8PeKmaFU+F4n9oyYPTzobatn56IF+D6K8 /1rIdqwDCQtPEo8R13hcakLVTxCwysZupgmQEEnnRqKkGUQTXqrmTFrT8AfQIlW6Snly kxlzYDOTcmwGY+3NI3doGbYW0UNON++YjOpP9fwd3QKPZDZxV+zlq+rPg+vT4tQXk3M+ NNCmGGY2q3wIB2KlZyEzfzRJfcEqnLorenKiSE/qvohSDQqJq+4bO6nWE13FiVO8MQuJ jEzdVd8d8ZmiCJu4p9kpVXQ/7cCZ3YI0nSCZ/WbsguC1OpShB0Hbs0ZVM7L4TT2U+GLV JPEQ== X-Gm-Message-State: ABy/qLYmbBi2dyTO83eZ58Pgyu+66VQqRxedK4XP8vPFnPg+Dyxw9byi rYlcG4w9vrNaxTR74xAjfWP05g== X-Google-Smtp-Source: APBJJlH8SkZovaBL43/tLWqoZ3fBR0XBkmVGy0uXARpdi3AER3WOYf3EsHJKszN8s65be9uhrbpx8A== X-Received: by 2002:a05:6a20:12d3:b0:125:6443:4eb8 with SMTP id v19-20020a056a2012d300b0012564434eb8mr5769272pzg.5.1690445453524; Thu, 27 Jul 2023 01:10:53 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.10.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:10:53 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v3 25/49] drm/msm: dynamically allocate the drm-msm_gem shrinker Date: Thu, 27 Jul 2023 16:04:38 +0800 Message-Id: <20230727080502.77895-26-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the drm-msm_gem shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct msm_drm_private. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- drivers/gpu/drm/msm/msm_drv.c | 4 ++- drivers/gpu/drm/msm/msm_drv.h | 4 +-- drivers/gpu/drm/msm/msm_gem_shrinker.c | 34 ++++++++++++++++---------- 3 files changed, 26 insertions(+), 16 deletions(-) diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c index 4bd028fa7500..7f20249d6071 100644 --- a/drivers/gpu/drm/msm/msm_drv.c +++ b/drivers/gpu/drm/msm/msm_drv.c @@ -462,7 +462,9 @@ static int msm_drm_init(struct device *dev, const struct drm_driver *drv) if (ret) goto err_msm_uninit; - msm_gem_shrinker_init(ddev); + ret = msm_gem_shrinker_init(ddev); + if (ret) + goto err_msm_uninit; if (priv->kms_init) { ret = priv->kms_init(ddev); diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h index 02fd6c7d0bb7..e2fc56f161b5 100644 --- a/drivers/gpu/drm/msm/msm_drv.h +++ b/drivers/gpu/drm/msm/msm_drv.h @@ -221,7 +221,7 @@ struct msm_drm_private { } vram; struct notifier_block vmap_notifier; - struct shrinker shrinker; + struct shrinker *shrinker; struct drm_atomic_state *pm_state; @@ -283,7 +283,7 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data, unsigned long msm_gem_shrinker_shrink(struct drm_device *dev, unsigned long nr_to_scan); #endif -void msm_gem_shrinker_init(struct drm_device *dev); +int msm_gem_shrinker_init(struct drm_device *dev); void msm_gem_shrinker_cleanup(struct drm_device *dev); struct sg_table *msm_gem_prime_get_sg_table(struct drm_gem_object *obj); diff --git a/drivers/gpu/drm/msm/msm_gem_shrinker.c b/drivers/gpu/drm/msm/msm_gem_shrinker.c index f38296ad8743..20699993e4f8 100644 --- a/drivers/gpu/drm/msm/msm_gem_shrinker.c +++ b/drivers/gpu/drm/msm/msm_gem_shrinker.c @@ -34,8 +34,7 @@ static bool can_block(struct shrink_control *sc) static unsigned long msm_gem_shrinker_count(struct shrinker *shrinker, struct shrink_control *sc) { - struct msm_drm_private *priv = - container_of(shrinker, struct msm_drm_private, shrinker); + struct msm_drm_private *priv = shrinker->private_data; unsigned count = priv->lru.dontneed.count; if (can_swap()) @@ -100,8 +99,7 @@ active_evict(struct drm_gem_object *obj) static unsigned long msm_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc) { - struct msm_drm_private *priv = - container_of(shrinker, struct msm_drm_private, shrinker); + struct msm_drm_private *priv = shrinker->private_data; struct { struct drm_gem_lru *lru; bool (*shrink)(struct drm_gem_object *obj); @@ -148,10 +146,11 @@ msm_gem_shrinker_shrink(struct drm_device *dev, unsigned long nr_to_scan) struct shrink_control sc = { .nr_to_scan = nr_to_scan, }; - int ret; + unsigned long ret = SHRINK_STOP; fs_reclaim_acquire(GFP_KERNEL); - ret = msm_gem_shrinker_scan(&priv->shrinker, &sc); + if (priv->shrinker) + ret = msm_gem_shrinker_scan(priv->shrinker, &sc); fs_reclaim_release(GFP_KERNEL); return ret; @@ -210,16 +209,25 @@ msm_gem_shrinker_vmap(struct notifier_block *nb, unsigned long event, void *ptr) * * This function registers and sets up the msm shrinker. */ -void msm_gem_shrinker_init(struct drm_device *dev) +int msm_gem_shrinker_init(struct drm_device *dev) { struct msm_drm_private *priv = dev->dev_private; - priv->shrinker.count_objects = msm_gem_shrinker_count; - priv->shrinker.scan_objects = msm_gem_shrinker_scan; - priv->shrinker.seeks = DEFAULT_SEEKS; - WARN_ON(register_shrinker(&priv->shrinker, "drm-msm_gem")); + + priv->shrinker = shrinker_alloc(0, "drm-msm_gem"); + if (!priv->shrinker) + return -ENOMEM; + + priv->shrinker->count_objects = msm_gem_shrinker_count; + priv->shrinker->scan_objects = msm_gem_shrinker_scan; + priv->shrinker->seeks = DEFAULT_SEEKS; + priv->shrinker->private_data = priv; + + shrinker_register(priv->shrinker); priv->vmap_notifier.notifier_call = msm_gem_shrinker_vmap; WARN_ON(register_vmap_purge_notifier(&priv->vmap_notifier)); + + return 0; } /** @@ -232,8 +240,8 @@ void msm_gem_shrinker_cleanup(struct drm_device *dev) { struct msm_drm_private *priv = dev->dev_private; - if (priv->shrinker.nr_deferred) { + if (priv->shrinker) { WARN_ON(unregister_vmap_purge_notifier(&priv->vmap_notifier)); - unregister_shrinker(&priv->shrinker); + shrinker_free(priv->shrinker); } } From patchwork Thu Jul 27 08:04:39 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329300 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8CC091079B for ; Thu, 27 Jul 2023 08:11:55 +0000 (UTC) Received: from mail-pf1-x42a.google.com (mail-pf1-x42a.google.com [IPv6:2607:f8b0:4864:20::42a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 10972728F for ; Thu, 27 Jul 2023 01:11:37 -0700 (PDT) Received: by mail-pf1-x42a.google.com with SMTP id d2e1a72fcca58-6862d4a1376so189196b3a.0 for ; Thu, 27 Jul 2023 01:11:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445466; x=1691050266; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=vjqO/ZPr/Go39gpx6DVg0WzFepitwPif37hI1XuxbyE=; b=KWf7bMy1nbQ37OxDK+aLk4UU+d+DpidRt45gsv6WisntZ5r23wZ3pYKMCoLchBsQxQ dbRrJ4b0aFwJmGna2/IEy8T8QiKnn2NACgYbVRTrckTcQDGJyAPHMooOCl62MUAwOoyA JbZysBi4oQBt301gAOSv+2GS8dKtdtSP0nG8DKgUtI05eGkdQUUBXQMQvZN3o0luNYiw 8kcVk8roCfN8SKqwYrPgL6wyyB4sigzvUww4WP5NJ+eSnXEpjiht6HKW6ptfgHl7+XLv 6NnbrWDfXzNY62UnzW5yOMd63/qymxxfuyafQ4go8x2ZHPA9qwKwZ1PQJSZV3Wy/oPgn SKCg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445466; x=1691050266; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=vjqO/ZPr/Go39gpx6DVg0WzFepitwPif37hI1XuxbyE=; b=f1zqVSWP5v1R/KQX9ENoXVudIMNL21i/orsWt9ZWmFBz379yj639s4wzzeeXUozHYd +/eE9TOeY9AuIb1Q0su+Af8wnjEqhwSgP2b5QPDsFM6IBuCwFn6EaByC/hrp7vEvRQAJ Wy6F8Rl64B/sSD/CeUuVwRXVl9LOFY1UX8R8YR4acMSIypDdBiAqWQUKmFybbmDyVQ+2 h7b3f+jW+8i+nx+z0RWiXEgyWRgz86+cIJO8h3EcKjZfk09v7u17l+upayS2wcQm3wHN WumJSYVj778MNvpcvaZ4mh3JedCmfzZWJ/L+8jc2dUIKvAnRhJPO0XP/0MkgxplbmZuQ gvaA== X-Gm-Message-State: ABy/qLYSNFX3ZKlZ895DZDXzurEVwC2vb0J62qWt83XEM3stYHlFqlny tPR6/oDmGg7UIvJR/PTKpfNvpQ== X-Google-Smtp-Source: APBJJlHsQWiMeK1ZGCoT9EMqzV36W3zQjtsLKzuNfdQAXhrStS5DTpZT9lorCJhzpRLn0tDb83CKIQ== X-Received: by 2002:aa7:8615:0:b0:681:9fe0:b543 with SMTP id p21-20020aa78615000000b006819fe0b543mr4626555pfn.2.1690445465777; Thu, 27 Jul 2023 01:11:05 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.10.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:11:05 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH v3 26/49] drm/panfrost: dynamically allocate the drm-panfrost shrinker Date: Thu, 27 Jul 2023 16:04:39 +0800 Message-Id: <20230727080502.77895-27-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the drm-panfrost shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct panfrost_device. Signed-off-by: Qi Zheng Reviewed-by: Steven Price --- drivers/gpu/drm/panfrost/panfrost_device.h | 2 +- drivers/gpu/drm/panfrost/panfrost_drv.c | 6 +++- drivers/gpu/drm/panfrost/panfrost_gem.h | 2 +- .../gpu/drm/panfrost/panfrost_gem_shrinker.c | 30 +++++++++++-------- 4 files changed, 25 insertions(+), 15 deletions(-) diff --git a/drivers/gpu/drm/panfrost/panfrost_device.h b/drivers/gpu/drm/panfrost/panfrost_device.h index b0126b9fbadc..e667e5689353 100644 --- a/drivers/gpu/drm/panfrost/panfrost_device.h +++ b/drivers/gpu/drm/panfrost/panfrost_device.h @@ -118,7 +118,7 @@ struct panfrost_device { struct mutex shrinker_lock; struct list_head shrinker_list; - struct shrinker shrinker; + struct shrinker *shrinker; struct panfrost_devfreq pfdevfreq; }; diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c index a2ab99698ca8..e1d0e3a23757 100644 --- a/drivers/gpu/drm/panfrost/panfrost_drv.c +++ b/drivers/gpu/drm/panfrost/panfrost_drv.c @@ -601,10 +601,14 @@ static int panfrost_probe(struct platform_device *pdev) if (err < 0) goto err_out1; - panfrost_gem_shrinker_init(ddev); + err = panfrost_gem_shrinker_init(ddev); + if (err) + goto err_out2; return 0; +err_out2: + drm_dev_unregister(ddev); err_out1: pm_runtime_disable(pfdev->dev); panfrost_device_fini(pfdev); diff --git a/drivers/gpu/drm/panfrost/panfrost_gem.h b/drivers/gpu/drm/panfrost/panfrost_gem.h index ad2877eeeccd..863d2ec8d4f0 100644 --- a/drivers/gpu/drm/panfrost/panfrost_gem.h +++ b/drivers/gpu/drm/panfrost/panfrost_gem.h @@ -81,7 +81,7 @@ panfrost_gem_mapping_get(struct panfrost_gem_object *bo, void panfrost_gem_mapping_put(struct panfrost_gem_mapping *mapping); void panfrost_gem_teardown_mappings_locked(struct panfrost_gem_object *bo); -void panfrost_gem_shrinker_init(struct drm_device *dev); +int panfrost_gem_shrinker_init(struct drm_device *dev); void panfrost_gem_shrinker_cleanup(struct drm_device *dev); #endif /* __PANFROST_GEM_H__ */ diff --git a/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c b/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c index 6a71a2555f85..3dfe2b7ccdd9 100644 --- a/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c +++ b/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c @@ -18,8 +18,7 @@ static unsigned long panfrost_gem_shrinker_count(struct shrinker *shrinker, struct shrink_control *sc) { - struct panfrost_device *pfdev = - container_of(shrinker, struct panfrost_device, shrinker); + struct panfrost_device *pfdev = shrinker->private_data; struct drm_gem_shmem_object *shmem; unsigned long count = 0; @@ -65,8 +64,7 @@ static bool panfrost_gem_purge(struct drm_gem_object *obj) static unsigned long panfrost_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc) { - struct panfrost_device *pfdev = - container_of(shrinker, struct panfrost_device, shrinker); + struct panfrost_device *pfdev = shrinker->private_data; struct drm_gem_shmem_object *shmem, *tmp; unsigned long freed = 0; @@ -97,13 +95,22 @@ panfrost_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc) * * This function registers and sets up the panfrost shrinker. */ -void panfrost_gem_shrinker_init(struct drm_device *dev) +int panfrost_gem_shrinker_init(struct drm_device *dev) { struct panfrost_device *pfdev = dev->dev_private; - pfdev->shrinker.count_objects = panfrost_gem_shrinker_count; - pfdev->shrinker.scan_objects = panfrost_gem_shrinker_scan; - pfdev->shrinker.seeks = DEFAULT_SEEKS; - WARN_ON(register_shrinker(&pfdev->shrinker, "drm-panfrost")); + + pfdev->shrinker = shrinker_alloc(0, "drm-panfrost"); + if (!pfdev->shrinker) + return -ENOMEM; + + pfdev->shrinker->count_objects = panfrost_gem_shrinker_count; + pfdev->shrinker->scan_objects = panfrost_gem_shrinker_scan; + pfdev->shrinker->seeks = DEFAULT_SEEKS; + pfdev->shrinker->private_data = pfdev; + + shrinker_register(pfdev->shrinker); + + return 0; } /** @@ -116,7 +123,6 @@ void panfrost_gem_shrinker_cleanup(struct drm_device *dev) { struct panfrost_device *pfdev = dev->dev_private; - if (pfdev->shrinker.nr_deferred) { - unregister_shrinker(&pfdev->shrinker); - } + if (pfdev->shrinker) + shrinker_free(pfdev->shrinker); } From patchwork Thu Jul 27 08:04:40 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329301 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E90BAD511 for ; Thu, 27 Jul 2023 08:12:10 +0000 (UTC) Received: from mail-pf1-x436.google.com (mail-pf1-x436.google.com [IPv6:2607:f8b0:4864:20::436]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E48D47684 for ; Thu, 27 Jul 2023 01:11:47 -0700 (PDT) Received: by mail-pf1-x436.google.com with SMTP id d2e1a72fcca58-686f74a8992so78030b3a.1 for ; Thu, 27 Jul 2023 01:11:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445477; x=1691050277; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=/uDURfJnJhgp6SdQN0dR835bsVpn4QFEXgmrOE/fnW4=; b=XMYYvlyXrTmu7TBUMUrS0fAERGM3ULbRWCn4in2BRNinhRwId1ryL35VoKr2h4Rx+U HjLlRWIKGbBKN0lkokdfiXe7DL4/cW8JhUixM/OhO46u6zDYby/ZSHvD4zMfuAy6v0wa kMUIVYEZOCmoajTRWB9O5pPKf2KXDL1RA9QX/iWGDKdd+7AiEQpaXll5+7XF5hXMtboW QGfdfOEZoiLr6B07ra4S8ESol/cU0lfuHqis0vxsY6ajpZNCyt33YYUETwhkXmLJyVVM wWI0H3b2jkyty5FrIH3eGt0u2K+zpCq6JQc2FhUeW7es/kOOMNTlHxQiuG1Uqt5RUvfA 07oA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445477; x=1691050277; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=/uDURfJnJhgp6SdQN0dR835bsVpn4QFEXgmrOE/fnW4=; b=g/dhHCSDf0gMUlvxdhuqIBr5gng48qvWHbHOWat4SXnICPASjoOs76atnHYwB5lP61 huqEV89WdOq88SziDs+tzSKLdBCVUMSvB9tCSLwEg09Rhkt9nhT4HNI096qTvnKmfK7X R5j9Lb+kJbvwcpXV6b2h6fP7xs45Rsci7eig1dwYIBp+zlO8jw+EtOtMFCm3yrdp0nxa mx3mdAz45xVs1LLjdyWvUG+lIBv/KiD0tuM/BhwwRW8y/PdVlOtemHW98lofc/0+f1d8 4n5R5uNFaoHUUMRTJlPlBh/jt7Xm/5AqFVZbJzrw3TKb3HiIKQUKsX9sd1ODTs3ctPkr I4WA== X-Gm-Message-State: ABy/qLZKNOJc85uRQ4oVUyY8jJ7SJJke8RK4FK/KMa2im3ht3PNxcty0 TyF47IbdUfqeRJejypSPwyyaOw== X-Google-Smtp-Source: APBJJlG87NINI+/+i4SJ1KgSTM1EJ+JwVd/Dy5o7cICQ6coQ1cuBExOC2izM/xbO/Jy48XOYsOKRHA== X-Received: by 2002:a05:6a00:2b90:b0:67d:308b:97ef with SMTP id dv16-20020a056a002b9000b0067d308b97efmr4590349pfb.2.1690445477689; Thu, 27 Jul 2023 01:11:17 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.11.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:11:17 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v3 27/49] dm: dynamically allocate the dm-bufio shrinker Date: Thu, 27 Jul 2023 16:04:40 +0800 Message-Id: <20230727080502.77895-28-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the dm-bufio shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct dm_bufio_client. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- drivers/md/dm-bufio.c | 26 +++++++++++++++----------- 1 file changed, 15 insertions(+), 11 deletions(-) diff --git a/drivers/md/dm-bufio.c b/drivers/md/dm-bufio.c index bc309e41d074..5a9124b83d53 100644 --- a/drivers/md/dm-bufio.c +++ b/drivers/md/dm-bufio.c @@ -963,7 +963,7 @@ struct dm_bufio_client { sector_t start; - struct shrinker shrinker; + struct shrinker *shrinker; struct work_struct shrink_work; atomic_long_t need_shrink; @@ -2368,7 +2368,7 @@ static unsigned long dm_bufio_shrink_scan(struct shrinker *shrink, struct shrink { struct dm_bufio_client *c; - c = container_of(shrink, struct dm_bufio_client, shrinker); + c = shrink->private_data; atomic_long_add(sc->nr_to_scan, &c->need_shrink); queue_work(dm_bufio_wq, &c->shrink_work); @@ -2377,7 +2377,7 @@ static unsigned long dm_bufio_shrink_scan(struct shrinker *shrink, struct shrink static unsigned long dm_bufio_shrink_count(struct shrinker *shrink, struct shrink_control *sc) { - struct dm_bufio_client *c = container_of(shrink, struct dm_bufio_client, shrinker); + struct dm_bufio_client *c = shrink->private_data; unsigned long count = cache_total(&c->cache); unsigned long retain_target = get_retain_buffers(c); unsigned long queued_for_cleanup = atomic_long_read(&c->need_shrink); @@ -2490,15 +2490,19 @@ struct dm_bufio_client *dm_bufio_client_create(struct block_device *bdev, unsign INIT_WORK(&c->shrink_work, shrink_work); atomic_long_set(&c->need_shrink, 0); - c->shrinker.count_objects = dm_bufio_shrink_count; - c->shrinker.scan_objects = dm_bufio_shrink_scan; - c->shrinker.seeks = 1; - c->shrinker.batch = 0; - r = register_shrinker(&c->shrinker, "dm-bufio:(%u:%u)", - MAJOR(bdev->bd_dev), MINOR(bdev->bd_dev)); - if (r) + c->shrinker = shrinker_alloc(0, "dm-bufio:(%u:%u)", + MAJOR(bdev->bd_dev), MINOR(bdev->bd_dev)); + if (!c->shrinker) goto bad; + c->shrinker->count_objects = dm_bufio_shrink_count; + c->shrinker->scan_objects = dm_bufio_shrink_scan; + c->shrinker->seeks = 1; + c->shrinker->batch = 0; + c->shrinker->private_data = c; + + shrinker_register(c->shrinker); + mutex_lock(&dm_bufio_clients_lock); dm_bufio_client_count++; list_add(&c->client_list, &dm_bufio_all_clients); @@ -2537,7 +2541,7 @@ void dm_bufio_client_destroy(struct dm_bufio_client *c) drop_buffers(c); - unregister_shrinker(&c->shrinker); + shrinker_free(c->shrinker); flush_work(&c->shrink_work); mutex_lock(&dm_bufio_clients_lock); From patchwork Thu Jul 27 08:04:41 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329302 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 905C8D2E4 for ; Thu, 27 Jul 2023 08:12:39 +0000 (UTC) Received: from mail-pf1-x42f.google.com (mail-pf1-x42f.google.com [IPv6:2607:f8b0:4864:20::42f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DA7F97A93 for ; Thu, 27 Jul 2023 01:12:05 -0700 (PDT) Received: by mail-pf1-x42f.google.com with SMTP id d2e1a72fcca58-686f6231bdeso113404b3a.1 for ; Thu, 27 Jul 2023 01:12:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445490; x=1691050290; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=ze2BfjPj3zI6XK14aBXxwpj9cG5VKS+QoT9VkWxAsig=; b=lwOoY+OdQN9yyaycuuDe1xOBPNuMdpjPWf9iVdWyTJX4Rze1Ujyu7FqyyXfPUD3aU2 0geNSiBV+SjLplmH7ILvbtRHCHKM3vLFmOVDmsv1BEm9fkWkTRAM1imR53z99mDpf0IW ffoAdzAoMkEyhpVqT3oRFQGqTsCjJOMqkqnQ0DFV07QdT6HdoSrpGoFduwBz2OfpOwFt CWOX0mmKGcSRamco0Cg7QpPpz6Lx/kpTjodIKj6Sfbh0QvlZA2O3b8FhSM1hAbz32D/P 0DhVwgLc1Xu9esSsJfTXPYkz1XSyCT4LoDf/9vVVRpeHu2USWPZ+XNt9qGqYRzfEx2BR Y6jQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445490; x=1691050290; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=ze2BfjPj3zI6XK14aBXxwpj9cG5VKS+QoT9VkWxAsig=; b=E0VFFFQBHF94B8u1blEkmkaclcQNbvkghpvSH0/KA9j1hy1hrPsvt40VdFMuWamXKJ k15IZyyCJVDIhcBq8AsX3AyCwthlrfSONcmzYmwKMLmFLVy1b4mKHkdHPGrpuGLPuvPy wY9beTYJ3WKE2svQpy67GuVrSuHBl+NGoBhotWaY7sVFWbf4vnRBw4t4uy3UJ6Mv0KSL f/kEzjfqPRSBImwe+24i6EYPy6V6SS6/alAx6HI3qcP9rdtbOF3eDJZbU0lhJGlrLxdM D1hg7UJad3YYiYnJH8JF9KcKFDx4A5rbzzqIfPLNMVkc//HeptmihCIFVLb/mxhO2sRt LqgQ== X-Gm-Message-State: ABy/qLZ9f/pKNjOSEaLkKnY/MMezHtJbiCuPa8N4F0RAfS2QvFsMRxEz zfWgt1GBd1howV7ut7kQKFEufg== X-Google-Smtp-Source: APBJJlFMZtECqV3NWJubuagzux89byKCTiavknA18umD2w/BadGADzl49oXppHX8YppKwxO9L0rdOg== X-Received: by 2002:a05:6a00:1586:b0:67f:8ef5:2643 with SMTP id u6-20020a056a00158600b0067f8ef52643mr5208150pfk.2.1690445490190; Thu, 27 Jul 2023 01:11:30 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.11.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:11:29 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v3 28/49] dm zoned: dynamically allocate the dm-zoned-meta shrinker Date: Thu, 27 Jul 2023 16:04:41 +0800 Message-Id: <20230727080502.77895-29-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the dm-zoned-meta shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct dmz_metadata. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- drivers/md/dm-zoned-metadata.c | 28 ++++++++++++++++------------ 1 file changed, 16 insertions(+), 12 deletions(-) diff --git a/drivers/md/dm-zoned-metadata.c b/drivers/md/dm-zoned-metadata.c index 9d3cca8e3dc9..0bcb26a43578 100644 --- a/drivers/md/dm-zoned-metadata.c +++ b/drivers/md/dm-zoned-metadata.c @@ -187,7 +187,7 @@ struct dmz_metadata { struct rb_root mblk_rbtree; struct list_head mblk_lru_list; struct list_head mblk_dirty_list; - struct shrinker mblk_shrinker; + struct shrinker *mblk_shrinker; /* Zone allocation management */ struct mutex map_lock; @@ -615,7 +615,7 @@ static unsigned long dmz_shrink_mblock_cache(struct dmz_metadata *zmd, static unsigned long dmz_mblock_shrinker_count(struct shrinker *shrink, struct shrink_control *sc) { - struct dmz_metadata *zmd = container_of(shrink, struct dmz_metadata, mblk_shrinker); + struct dmz_metadata *zmd = shrink->private_data; return atomic_read(&zmd->nr_mblks); } @@ -626,7 +626,7 @@ static unsigned long dmz_mblock_shrinker_count(struct shrinker *shrink, static unsigned long dmz_mblock_shrinker_scan(struct shrinker *shrink, struct shrink_control *sc) { - struct dmz_metadata *zmd = container_of(shrink, struct dmz_metadata, mblk_shrinker); + struct dmz_metadata *zmd = shrink->private_data; unsigned long count; spin_lock(&zmd->mblk_lock); @@ -2936,19 +2936,23 @@ int dmz_ctr_metadata(struct dmz_dev *dev, int num_dev, */ zmd->min_nr_mblks = 2 + zmd->nr_map_blocks + zmd->zone_nr_bitmap_blocks * 16; zmd->max_nr_mblks = zmd->min_nr_mblks + 512; - zmd->mblk_shrinker.count_objects = dmz_mblock_shrinker_count; - zmd->mblk_shrinker.scan_objects = dmz_mblock_shrinker_scan; - zmd->mblk_shrinker.seeks = DEFAULT_SEEKS; /* Metadata cache shrinker */ - ret = register_shrinker(&zmd->mblk_shrinker, "dm-zoned-meta:(%u:%u)", - MAJOR(dev->bdev->bd_dev), - MINOR(dev->bdev->bd_dev)); - if (ret) { - dmz_zmd_err(zmd, "Register metadata cache shrinker failed"); + zmd->mblk_shrinker = shrinker_alloc(0, "dm-zoned-meta:(%u:%u)", + MAJOR(dev->bdev->bd_dev), + MINOR(dev->bdev->bd_dev)); + if (!zmd->mblk_shrinker) { + dmz_zmd_err(zmd, "Allocate metadata cache shrinker failed"); goto err; } + zmd->mblk_shrinker->count_objects = dmz_mblock_shrinker_count; + zmd->mblk_shrinker->scan_objects = dmz_mblock_shrinker_scan; + zmd->mblk_shrinker->seeks = DEFAULT_SEEKS; + zmd->mblk_shrinker->private_data = zmd; + + shrinker_register(zmd->mblk_shrinker); + dmz_zmd_info(zmd, "DM-Zoned metadata version %d", zmd->sb_version); for (i = 0; i < zmd->nr_devs; i++) dmz_print_dev(zmd, i); @@ -2995,7 +2999,7 @@ int dmz_ctr_metadata(struct dmz_dev *dev, int num_dev, */ void dmz_dtr_metadata(struct dmz_metadata *zmd) { - unregister_shrinker(&zmd->mblk_shrinker); + shrinker_free(zmd->mblk_shrinker); dmz_cleanup_metadata(zmd); kfree(zmd); } From patchwork Thu Jul 27 08:04:42 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329303 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 00D83E56E for ; Thu, 27 Jul 2023 08:12:54 +0000 (UTC) Received: from mail-pf1-x42b.google.com (mail-pf1-x42b.google.com [IPv6:2607:f8b0:4864:20::42b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4F59A272E for ; Thu, 27 Jul 2023 01:12:24 -0700 (PDT) Received: by mail-pf1-x42b.google.com with SMTP id d2e1a72fcca58-686f6231bdeso113463b3a.1 for ; Thu, 27 Jul 2023 01:12:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445502; x=1691050302; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=LaFX3BwmrpvhCQ7689MuoFj6fWFWMuerWJZNZNxWVVc=; b=SGV84iDT12fuj4KQ/vgxpHx68bD/8JsYSa9nhb7ntFAq0TKpEUCTaHREzmRsJ3Oz9G gFKmoptXd+Bze48vx/wk2NbZ7T10E7S2MEqYjOuFeG7krpKwSKpfVHBIQRglXfDWTvzO H6VjPKPaTyQraf7CXaxRYntDfW/rFmDGA8pIc8wp3mkyDCZKtDmTVn+WhnbJ9UTHRuGw cfWrmdeiaPvvoPdILYK4+expmzf+8d5vjjDAS5qG8jY/gHHW1jvZoSyULsapwlJ7yOSa R+fxk2s2E87YRuuXF3DsPLATcyScHTHvPiXBlY0TGTmF0pFa842v0dWDdf9orTc8Pn3s TgHw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445502; x=1691050302; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=LaFX3BwmrpvhCQ7689MuoFj6fWFWMuerWJZNZNxWVVc=; b=ADS1KLgq8ro4yuisUP5HuPlzqaEgW6CmhmJeRh5h5lGMEQEBU8leUQz4sYNAZkzFQb sbvO4qDabVoneq3uVPNXXRHBgQ5HEWk3zUOcmPqRuYFeAPgRHr3D2r35NXsJwTg4pWLA 1rYYSYS2g2t5ZN271wl/b3tExtYTz7i1ikyX53SDpAosX0yYycrH5xv1WyeThvTbMBVE QG6Y/GYvc6EdgYix+eX8ekzKQ7+3xLYb00RMZIUwJYmKazLDTD/2dhPigrUFqmHhPDoi dDYsoaxk2Mp8nLgdH0c6kVCz4msoGJg/4Q/r/GM+n+i4FWUlZAuEhkjc0judG7hLqBaL xC0A== X-Gm-Message-State: ABy/qLYmMh3Mev8sV3yYayTdlX5Qu4AJdHx07G/KVi9wB4o/mw2h8i6t yPF1gniVpIx7fQe7Kv/c+DYXEQ== X-Google-Smtp-Source: APBJJlE5krPFtX55mdmbm5NUPWWjP9qjtSRaT4qUAQtTa6jtnXVyWfbzlnq9LXdP1SlmgTnMsVycpA== X-Received: by 2002:a05:6a21:78a8:b0:137:3eba:b81f with SMTP id bf40-20020a056a2178a800b001373ebab81fmr6016028pzc.3.1690445502183; Thu, 27 Jul 2023 01:11:42 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.11.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:11:41 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v3 29/49] md/raid5: dynamically allocate the md-raid5 shrinker Date: Thu, 27 Jul 2023 16:04:42 +0800 Message-Id: <20230727080502.77895-30-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the md-raid5 shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct r5conf. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- drivers/md/raid5.c | 25 ++++++++++++++----------- drivers/md/raid5.h | 2 +- 2 files changed, 15 insertions(+), 12 deletions(-) diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 85b3004594e0..fbb4e6f5ff43 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -7414,7 +7414,7 @@ static void free_conf(struct r5conf *conf) log_exit(conf); - unregister_shrinker(&conf->shrinker); + shrinker_free(conf->shrinker); free_thread_groups(conf); shrink_stripes(conf); raid5_free_percpu(conf); @@ -7462,7 +7462,7 @@ static int raid5_alloc_percpu(struct r5conf *conf) static unsigned long raid5_cache_scan(struct shrinker *shrink, struct shrink_control *sc) { - struct r5conf *conf = container_of(shrink, struct r5conf, shrinker); + struct r5conf *conf = shrink->private_data; unsigned long ret = SHRINK_STOP; if (mutex_trylock(&conf->cache_size_mutex)) { @@ -7483,7 +7483,7 @@ static unsigned long raid5_cache_scan(struct shrinker *shrink, static unsigned long raid5_cache_count(struct shrinker *shrink, struct shrink_control *sc) { - struct r5conf *conf = container_of(shrink, struct r5conf, shrinker); + struct r5conf *conf = shrink->private_data; if (conf->max_nr_stripes < conf->min_nr_stripes) /* unlikely, but not impossible */ @@ -7718,18 +7718,21 @@ static struct r5conf *setup_conf(struct mddev *mddev) * it reduces the queue depth and so can hurt throughput. * So set it rather large, scaled by number of devices. */ - conf->shrinker.seeks = DEFAULT_SEEKS * conf->raid_disks * 4; - conf->shrinker.scan_objects = raid5_cache_scan; - conf->shrinker.count_objects = raid5_cache_count; - conf->shrinker.batch = 128; - conf->shrinker.flags = 0; - ret = register_shrinker(&conf->shrinker, "md-raid5:%s", mdname(mddev)); - if (ret) { - pr_warn("md/raid:%s: couldn't register shrinker.\n", + conf->shrinker = shrinker_alloc(0, "md-raid5:%s", mdname(mddev)); + if (!conf->shrinker) { + pr_warn("md/raid:%s: couldn't allocate shrinker.\n", mdname(mddev)); goto abort; } + conf->shrinker->seeks = DEFAULT_SEEKS * conf->raid_disks * 4; + conf->shrinker->scan_objects = raid5_cache_scan; + conf->shrinker->count_objects = raid5_cache_count; + conf->shrinker->batch = 128; + conf->shrinker->private_data = conf; + + shrinker_register(conf->shrinker); + sprintf(pers_name, "raid%d", mddev->new_level); rcu_assign_pointer(conf->thread, md_register_thread(raid5d, mddev, pers_name)); diff --git a/drivers/md/raid5.h b/drivers/md/raid5.h index 97a795979a35..22bea20eccbd 100644 --- a/drivers/md/raid5.h +++ b/drivers/md/raid5.h @@ -670,7 +670,7 @@ struct r5conf { wait_queue_head_t wait_for_stripe; wait_queue_head_t wait_for_overlap; unsigned long cache_state; - struct shrinker shrinker; + struct shrinker *shrinker; int pool_size; /* number of disks in stripeheads in pool */ spinlock_t device_lock; struct disk_info *disks; From patchwork Thu Jul 27 08:04:43 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329304 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8A9E6D513 for ; Thu, 27 Jul 2023 08:13:11 +0000 (UTC) Received: from mail-pf1-x42f.google.com (mail-pf1-x42f.google.com [IPv6:2607:f8b0:4864:20::42f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 560ED7D94 for ; Thu, 27 Jul 2023 01:12:46 -0700 (PDT) Received: by mail-pf1-x42f.google.com with SMTP id d2e1a72fcca58-686f6231bdeso113520b3a.1 for ; Thu, 27 Jul 2023 01:12:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445514; x=1691050314; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=v2xQZfHf5bNVsT7uWSGQWuu07PHxrGT3T56hFvtqSrg=; b=lyW6JZhnNvjcNaB7GqN1uV2v79yXaXII/N9CUBx8Ax42gYi0bx7SyKZlp7ota5OGyc xz3LFUjbyjINutpLynebvvBHzacoCfStfnIiREC/M8s52LB/S8PozvhLHL2LaKHkf4jF 9DRdteQ8XPpE6p0UjhjwxUS6BE53kxXxgyc4CEqj+ED289GAULMwnheYekYUqCpohGt5 Gmsuq+KFKYVL89VZVFvc5W/65nqN5yxt+BmUFxBx+3K9aBUApmiSNjlOWSgfmJvwi5CC 101OAH2cZQROpO/yBfNUpOitoioZFpWL88ogBko0HO5BvQ0gPjZ0smA8q12LAj1M0Z4O lOvA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445514; x=1691050314; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=v2xQZfHf5bNVsT7uWSGQWuu07PHxrGT3T56hFvtqSrg=; b=A8p7gnlOTre+VaKAAbsHXYlx603kyuHrhi9hS11vDF2Ka6lRuqbIelRGjwrQ1J8Hjg t2UkQABQGq/wowzZ/eT+SptMn1a0PRVDGaXu2F1BioX0xy6XZdCKjWAkXgHezYkcbV1r WhuJWiHoNGjzkSNmFsUlP/c1OfAwKPWaY6W9Xqo9iEMM3vK2ht89PYV1Qi/tMnQL4YXE 8ksyB7iLZtNSbmSew3zxttxwVUT2dWTh6eorHm6m2S9PaUArpBTxwXuJRLCJ06ZshVFT zlZMlcnFCUGz+p1MnEh8flkad4NPf3rqfouGzutJL9l+sWjwg+VGQ1pt0w3XMwawQSUt 0N2w== X-Gm-Message-State: ABy/qLZT5UXQDsbHYeG63bPUAgEZzq/PA49hKC2Ft/TQ30qHVMxUTn+s sNB5GVPCUFOomQJCY5n71X+e6g== X-Google-Smtp-Source: APBJJlFvU3cjl1WLZK8F+guGojMG4R1fFJkvV7n2FNowsaFmG5z+7vBu+UKq72H6C7V5uf+meL2LRA== X-Received: by 2002:a05:6a00:4a0e:b0:677:3439:874a with SMTP id do14-20020a056a004a0e00b006773439874amr5204339pfb.3.1690445513983; Thu, 27 Jul 2023 01:11:53 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.11.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:11:53 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH v3 30/49] bcache: dynamically allocate the md-bcache shrinker Date: Thu, 27 Jul 2023 16:04:43 +0800 Message-Id: <20230727080502.77895-31-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the md-bcache shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct cache_set. Signed-off-by: Qi Zheng --- drivers/md/bcache/bcache.h | 2 +- drivers/md/bcache/btree.c | 27 ++++++++++++++++----------- drivers/md/bcache/sysfs.c | 3 ++- 3 files changed, 19 insertions(+), 13 deletions(-) diff --git a/drivers/md/bcache/bcache.h b/drivers/md/bcache/bcache.h index 5a79bb3c272f..c622bc50f81b 100644 --- a/drivers/md/bcache/bcache.h +++ b/drivers/md/bcache/bcache.h @@ -541,7 +541,7 @@ struct cache_set { struct bio_set bio_split; /* For the btree cache */ - struct shrinker shrink; + struct shrinker *shrink; /* For the btree cache and anything allocation related */ struct mutex bucket_lock; diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c index fd121a61f17c..ae5cbb55861f 100644 --- a/drivers/md/bcache/btree.c +++ b/drivers/md/bcache/btree.c @@ -667,7 +667,7 @@ static int mca_reap(struct btree *b, unsigned int min_order, bool flush) static unsigned long bch_mca_scan(struct shrinker *shrink, struct shrink_control *sc) { - struct cache_set *c = container_of(shrink, struct cache_set, shrink); + struct cache_set *c = shrink->private_data; struct btree *b, *t; unsigned long i, nr = sc->nr_to_scan; unsigned long freed = 0; @@ -734,7 +734,7 @@ static unsigned long bch_mca_scan(struct shrinker *shrink, static unsigned long bch_mca_count(struct shrinker *shrink, struct shrink_control *sc) { - struct cache_set *c = container_of(shrink, struct cache_set, shrink); + struct cache_set *c = shrink->private_data; if (c->shrinker_disabled) return 0; @@ -752,8 +752,8 @@ void bch_btree_cache_free(struct cache_set *c) closure_init_stack(&cl); - if (c->shrink.list.next) - unregister_shrinker(&c->shrink); + if (c->shrink) + shrinker_free(c->shrink); mutex_lock(&c->bucket_lock); @@ -828,14 +828,19 @@ int bch_btree_cache_alloc(struct cache_set *c) c->verify_data = NULL; #endif - c->shrink.count_objects = bch_mca_count; - c->shrink.scan_objects = bch_mca_scan; - c->shrink.seeks = 4; - c->shrink.batch = c->btree_pages * 2; + c->shrink = shrinker_alloc(0, "md-bcache:%pU", c->set_uuid); + if (!c->shrink) { + pr_warn("bcache: %s: could not allocate shrinker\n", __func__); + return 0; + } + + c->shrink->count_objects = bch_mca_count; + c->shrink->scan_objects = bch_mca_scan; + c->shrink->seeks = 4; + c->shrink->batch = c->btree_pages * 2; + c->shrink->private_data = c; - if (register_shrinker(&c->shrink, "md-bcache:%pU", c->set_uuid)) - pr_warn("bcache: %s: could not register shrinker\n", - __func__); + shrinker_register(c->shrink); return 0; } diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c index 0e2c1880f60b..45d8af755de6 100644 --- a/drivers/md/bcache/sysfs.c +++ b/drivers/md/bcache/sysfs.c @@ -866,7 +866,8 @@ STORE(__bch_cache_set) sc.gfp_mask = GFP_KERNEL; sc.nr_to_scan = strtoul_or_return(buf); - c->shrink.scan_objects(&c->shrink, &sc); + if (c->shrink) + c->shrink->scan_objects(c->shrink, &sc); } sysfs_strtoul_clamp(congested_read_threshold_us, From patchwork Thu Jul 27 08:04:44 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329436 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1EBEE10970 for ; Thu, 27 Jul 2023 08:13:29 +0000 (UTC) Received: from mail-pf1-x429.google.com (mail-pf1-x429.google.com [IPv6:2607:f8b0:4864:20::429]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EC6A63ABD for ; Thu, 27 Jul 2023 01:13:03 -0700 (PDT) Received: by mail-pf1-x429.google.com with SMTP id d2e1a72fcca58-682ae5d4184so171384b3a.1 for ; Thu, 27 Jul 2023 01:13:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445526; x=1691050326; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=2n4eBW/y496rw0R30jGqgr9PaTd+TyGx4MFgxeJTY98=; b=DFuBBIj0qr+rYIge0pXV6Iz/WQCtDScPhobpwepkK1qFA4vWSgHpJ4XkcYuuPfpNPf m1KmSzju36tqFFEerRbxzoJUh0jIYJTO7HIOFb+RZm+pVFB00ovmyWsAOFYYwfcBZmMb e24YxGtb0LaJS553DCfCR3CRRqCI01KNxWybG2aaWT/P5M881ZLs+BB0bNl6iFKLm1jP 1CGPhfxCNsRDquotgL0k/wpTHggVzHbYlQp/c6oXuHB7Tn0FP6ZxNpyiHbKUJJqBcB/S A1bIsa86Qg72/76knWel/9Oqk1Wqg5ySfdUAutMowRhvxEtU3jYo18G5n5eEy4cYbgQS NQLw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445526; x=1691050326; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=2n4eBW/y496rw0R30jGqgr9PaTd+TyGx4MFgxeJTY98=; b=guYvW+My/5RsfDoEgbEjZzJjJTKHwqaz7zvEY/rFdKC6F0+HDT2xrTTZB/nv5aQGQQ pRg1V+90RpUhP2PiZCG7wVQ1GQlye2ZbpdQO40BFzmf+8DJ9429Pi95CP2wwTMQv7WFe Ziy4TTqv0g/l5S675KdXuColA7kC4Z+ST+fuCrkI/K7qQvZY5+ckImjdj9fR9pIwyJWp AB8NbcZMxJGrQC/r6bIGJKg78vgeJwLYPu8rVSOQh8iQVhGaHKbOtiniyJY5TCNuu6ME /vZSZzhlS/1HlfkcyQgUXIY2xYz61Bv2h3KOnW5qygOTWfISaqN73e3AfKncsEGL7DtT XiEA== X-Gm-Message-State: ABy/qLY/9U83BZLP8QpXFaIiPZJ3Zn2HS1WctG5JUGlwUZTxYuFPb09x DyBW8sSGhWyzK9nocjjL4lYsLw== X-Google-Smtp-Source: APBJJlHcYWOCpFnX36R6RazQvm5Mh7k9Kqh4ud2Oospjm3wjIj4ouKJfJr17R2K3rHFvQEDvt90Syw== X-Received: by 2002:a05:6a00:4685:b0:675:8521:ddc7 with SMTP id de5-20020a056a00468500b006758521ddc7mr4426362pfb.0.1690445525874; Thu, 27 Jul 2023 01:12:05 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.11.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:12:05 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v3 31/49] vmw_balloon: dynamically allocate the vmw-balloon shrinker Date: Thu, 27 Jul 2023 16:04:44 +0800 Message-Id: <20230727080502.77895-32-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the vmw-balloon shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct vmballoon. And we can simply exit vmballoon_init() when registering the shrinker fails. So the shrinker_registered indication is redundant, just remove it. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- drivers/misc/vmw_balloon.c | 38 ++++++++++++-------------------------- 1 file changed, 12 insertions(+), 26 deletions(-) diff --git a/drivers/misc/vmw_balloon.c b/drivers/misc/vmw_balloon.c index 9ce9b9e0e9b6..ac2cdb6cdf74 100644 --- a/drivers/misc/vmw_balloon.c +++ b/drivers/misc/vmw_balloon.c @@ -380,16 +380,7 @@ struct vmballoon { /** * @shrinker: shrinker interface that is used to avoid over-inflation. */ - struct shrinker shrinker; - - /** - * @shrinker_registered: whether the shrinker was registered. - * - * The shrinker interface does not handle gracefully the removal of - * shrinker that was not registered before. This indication allows to - * simplify the unregistration process. - */ - bool shrinker_registered; + struct shrinker *shrinker; }; static struct vmballoon balloon; @@ -1568,29 +1559,27 @@ static unsigned long vmballoon_shrinker_count(struct shrinker *shrinker, static void vmballoon_unregister_shrinker(struct vmballoon *b) { - if (b->shrinker_registered) - unregister_shrinker(&b->shrinker); - b->shrinker_registered = false; + shrinker_free(b->shrinker); } static int vmballoon_register_shrinker(struct vmballoon *b) { - int r; - /* Do nothing if the shrinker is not enabled */ if (!vmwballoon_shrinker_enable) return 0; - b->shrinker.scan_objects = vmballoon_shrinker_scan; - b->shrinker.count_objects = vmballoon_shrinker_count; - b->shrinker.seeks = DEFAULT_SEEKS; + b->shrinker = shrinker_alloc(0, "vmw-balloon"); + if (!b->shrinker) + return -ENOMEM; - r = register_shrinker(&b->shrinker, "vmw-balloon"); + b->shrinker->scan_objects = vmballoon_shrinker_scan; + b->shrinker->count_objects = vmballoon_shrinker_count; + b->shrinker->seeks = DEFAULT_SEEKS; + b->shrinker->private_data = b; - if (r == 0) - b->shrinker_registered = true; + shrinker_register(b->shrinker); - return r; + return 0; } /* @@ -1883,7 +1872,7 @@ static int __init vmballoon_init(void) error = vmballoon_register_shrinker(&balloon); if (error) - goto fail; + return error; /* * Initialization of compaction must be done after the call to @@ -1905,9 +1894,6 @@ static int __init vmballoon_init(void) vmballoon_debugfs_init(&balloon); return 0; -fail: - vmballoon_unregister_shrinker(&balloon); - return error; } /* From patchwork Thu Jul 27 08:04:45 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329544 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 70997C8EC for ; Thu, 27 Jul 2023 08:18:31 +0000 (UTC) Received: from mail-pf1-f178.google.com (mail-pf1-f178.google.com [209.85.210.178]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 57B8110DB for ; Thu, 27 Jul 2023 01:18:03 -0700 (PDT) Received: by mail-pf1-f178.google.com with SMTP id d2e1a72fcca58-682eef7d752so204689b3a.0 for ; Thu, 27 Jul 2023 01:18:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445538; x=1691050338; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=nhs5C6wYTK112tB0Y3rKeCsMBEmGx3fQoCnqZ3HCCLA=; b=P3BNYmrnn+aNeQX6tJNAWjBR47qoFVwe6V1hXSSWwFyS61HuOjfx1CldC/bVPLDS4b tBSPVcIpokpC1gG54dPeypV2gv1H1PsrEki/AFkEglXm+WyAmzSAHFAjlypTbwzHUkTv XwwWUlwnKhA8sSKQw+cOvBa/dT3CBu+sYvYNSpbwNT6pp20knmU+insJC0lJR8d7KNA/ XFw3RfaoZY9/IU0U207vkdiCmyduxENHuADRmTAqpUtqVvF1N7pwLKXyEsFC4IstCLHw nMtpKLIm0n/1aYuhmB1FsTVe4JczwGUa2wEUGkSK8KQu0Fafs8lJ3mpNN+7ETdaWOSMf 16qA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445538; x=1691050338; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=nhs5C6wYTK112tB0Y3rKeCsMBEmGx3fQoCnqZ3HCCLA=; b=Af954U3tDIgeD0xy2jVVcdtpJbdtmHk4grEJt2VjIRQFNIqk+242d3/J+35Sloze+d FAtjCpSsZ3tLVY7nVyP8FUhxhWREDImT1EYvRsUsMTHfgi5ZgIpSAL0O/ZA1COKweqz7 mYonGg9dXtmmkQbgxxEUMXtFNz4vBg/eXvr2Sry7E3dUi+tGFxEZ8zSXIhOSd7Tc6M9S o9vq2NjVgN8KSgfN0au5Fzv95sz+GZqHnHr6i1Q7CyAnqqHgFmHGuukcUyUT7WS//0XZ YUTs0oDFI5kRMZN/tSwV4k52gsIXSvsL879n60wm5wRUbgqZiqHctSaITQt0X4vYfhR/ 8c0Q== X-Gm-Message-State: ABy/qLaRfgtcrZgqJO7mZCs45qUVuVJ1Cqd1kmBybdHLRKDL5BmAExEo HUfdF7iVOTxQcI9sKrffHTAWEg== X-Google-Smtp-Source: APBJJlELYJ+VP3jkb44itFX28rq7UhufR3zr/NDN3xCao+bv4nVfpqzapahZiZsalg40ZmAEO1GP5Q== X-Received: by 2002:a05:6a00:13a3:b0:676:2a5c:7bc5 with SMTP id t35-20020a056a0013a300b006762a5c7bc5mr5236670pfg.1.1690445537850; Thu, 27 Jul 2023 01:12:17 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.12.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:12:17 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v3 32/49] virtio_balloon: dynamically allocate the virtio-balloon shrinker Date: Thu, 27 Jul 2023 16:04:45 +0800 Message-Id: <20230727080502.77895-33-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_NONE, T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the virtio-balloon shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct virtio_balloon. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- drivers/virtio/virtio_balloon.c | 25 +++++++++++++++---------- 1 file changed, 15 insertions(+), 10 deletions(-) diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index 5b15936a5214..82e6087073a9 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -111,7 +111,7 @@ struct virtio_balloon { struct virtio_balloon_stat stats[VIRTIO_BALLOON_S_NR]; /* Shrinker to return free pages - VIRTIO_BALLOON_F_FREE_PAGE_HINT */ - struct shrinker shrinker; + struct shrinker *shrinker; /* OOM notifier to deflate on OOM - VIRTIO_BALLOON_F_DEFLATE_ON_OOM */ struct notifier_block oom_nb; @@ -816,8 +816,7 @@ static unsigned long shrink_free_pages(struct virtio_balloon *vb, static unsigned long virtio_balloon_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc) { - struct virtio_balloon *vb = container_of(shrinker, - struct virtio_balloon, shrinker); + struct virtio_balloon *vb = shrinker->private_data; return shrink_free_pages(vb, sc->nr_to_scan); } @@ -825,8 +824,7 @@ static unsigned long virtio_balloon_shrinker_scan(struct shrinker *shrinker, static unsigned long virtio_balloon_shrinker_count(struct shrinker *shrinker, struct shrink_control *sc) { - struct virtio_balloon *vb = container_of(shrinker, - struct virtio_balloon, shrinker); + struct virtio_balloon *vb = shrinker->private_data; return vb->num_free_page_blocks * VIRTIO_BALLOON_HINT_BLOCK_PAGES; } @@ -847,16 +845,23 @@ static int virtio_balloon_oom_notify(struct notifier_block *nb, static void virtio_balloon_unregister_shrinker(struct virtio_balloon *vb) { - unregister_shrinker(&vb->shrinker); + shrinker_free(vb->shrinker); } static int virtio_balloon_register_shrinker(struct virtio_balloon *vb) { - vb->shrinker.scan_objects = virtio_balloon_shrinker_scan; - vb->shrinker.count_objects = virtio_balloon_shrinker_count; - vb->shrinker.seeks = DEFAULT_SEEKS; + vb->shrinker = shrinker_alloc(0, "virtio-balloon"); + if (!vb->shrinker) + return -ENOMEM; - return register_shrinker(&vb->shrinker, "virtio-balloon"); + vb->shrinker->scan_objects = virtio_balloon_shrinker_scan; + vb->shrinker->count_objects = virtio_balloon_shrinker_count; + vb->shrinker->seeks = DEFAULT_SEEKS; + vb->shrinker->private_data = vb; + + shrinker_register(vb->shrinker); + + return 0; } static int virtballoon_probe(struct virtio_device *vdev) From patchwork Thu Jul 27 08:04:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329444 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 087C6134C4 for ; Thu, 27 Jul 2023 08:14:55 +0000 (UTC) Received: from mail-pf1-f174.google.com (mail-pf1-f174.google.com [209.85.210.174]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 171DB5584 for ; Thu, 27 Jul 2023 01:14:39 -0700 (PDT) Received: by mail-pf1-f174.google.com with SMTP id d2e1a72fcca58-6748a616e17so183579b3a.1 for ; Thu, 27 Jul 2023 01:14:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445550; x=1691050350; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=xVRvDV5EwClRaurogoo7jeCmWiPiam6NNimoVigpYsU=; b=VWs5xsEpAgA4DYNqF8K/FN4j7udZSbXqCeXnxv3YTG0Ik0TL2nl/Ugga9u7R+ZJeNR Wigeakgpk32H5TPwyUhkE7IqyM04zeUMVcePDa9eTKcIqF7mvyeMYMdU6pDKFeWcNWaR qvQCy7Nu/xowW6gGi5vD7bu0NuXZ8UlBiffMC2ufEn1khdTpqjsjaFRzBjIrPJfwSFKG LuwPnQLNAsZ+sSXWuMdy2i4BIcl75Eemb6JwQ/h/qU8W848mv79pSK1svvdUmrASzQOQ aQzV7ZNEhcTzx5oZvxCfNrl/tTU7BbbCJB9SufDvnC5P9J0UXQ5a+DGx/aTVEKn/U2IP 9i7w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445550; x=1691050350; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=xVRvDV5EwClRaurogoo7jeCmWiPiam6NNimoVigpYsU=; b=hnyOl3bmRGK/2daaut90D1dXhFuOU9Pnvlr56MasoPo56s7CJaS0INxfcZ/lY4XkYh gCkDyCUPxtU1wkwxX+EPHB0aYWEnn1IYGK/s1biFga5YfRDbBNurt4cKZVKNYgKy6E8V dOl/yeoxX5MBoEt5WKBKrb3tCqgd9GpHEVqGlFSi2e7lGV1NG1GAheKPaLIwlF1L2m1O gaXN+4KyUIPJRki4Siu0Fksw8NfoLRGN6lLgzTXGCXQtmm/sNMLcpzTsrt99rdMjjWef CHBWPSi4c4yojvTCz9QknhEYlAnsX8x7m92QZRaSpl6WIUUu6D//ltycUxCLf5+m7Bp+ Tm3g== X-Gm-Message-State: ABy/qLYyuzWIp94YU7BdhngSYKw70j9CdglnU82tuGtny1uqGRKlCOZ1 3lIqNMnNm9g3S/R1nKvI7T/7ew== X-Google-Smtp-Source: APBJJlF08KF/2Ja1GiYKXzi0SbMDWba0XluK8fJxZEI3QrufrkFF+7lpMuNnhPZU1iQtSxNfzq1jqw== X-Received: by 2002:a05:6a21:32a9:b0:136:f3ef:4d2 with SMTP id yt41-20020a056a2132a900b00136f3ef04d2mr6069372pzb.3.1690445550183; Thu, 27 Jul 2023 01:12:30 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.12.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:12:29 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v3 33/49] mbcache: dynamically allocate the mbcache shrinker Date: Thu, 27 Jul 2023 16:04:46 +0800 Message-Id: <20230727080502.77895-34-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_BLOCKED, RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_NONE, T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the mbcache shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct mb_cache. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/mbcache.c | 23 +++++++++++++---------- 1 file changed, 13 insertions(+), 10 deletions(-) diff --git a/fs/mbcache.c b/fs/mbcache.c index 2a4b8b549e93..0d1e24e9a5e3 100644 --- a/fs/mbcache.c +++ b/fs/mbcache.c @@ -37,7 +37,7 @@ struct mb_cache { struct list_head c_list; /* Number of entries in cache */ unsigned long c_entry_count; - struct shrinker c_shrink; + struct shrinker *c_shrink; /* Work for shrinking when the cache has too many entries */ struct work_struct c_shrink_work; }; @@ -293,8 +293,7 @@ EXPORT_SYMBOL(mb_cache_entry_touch); static unsigned long mb_cache_count(struct shrinker *shrink, struct shrink_control *sc) { - struct mb_cache *cache = container_of(shrink, struct mb_cache, - c_shrink); + struct mb_cache *cache = shrink->private_data; return cache->c_entry_count; } @@ -333,8 +332,7 @@ static unsigned long mb_cache_shrink(struct mb_cache *cache, static unsigned long mb_cache_scan(struct shrinker *shrink, struct shrink_control *sc) { - struct mb_cache *cache = container_of(shrink, struct mb_cache, - c_shrink); + struct mb_cache *cache = shrink->private_data; return mb_cache_shrink(cache, sc->nr_to_scan); } @@ -377,15 +375,20 @@ struct mb_cache *mb_cache_create(int bucket_bits) for (i = 0; i < bucket_count; i++) INIT_HLIST_BL_HEAD(&cache->c_hash[i]); - cache->c_shrink.count_objects = mb_cache_count; - cache->c_shrink.scan_objects = mb_cache_scan; - cache->c_shrink.seeks = DEFAULT_SEEKS; - if (register_shrinker(&cache->c_shrink, "mbcache-shrinker")) { + cache->c_shrink = shrinker_alloc(0, "mbcache-shrinker"); + if (!cache->c_shrink) { kfree(cache->c_hash); kfree(cache); goto err_out; } + cache->c_shrink->count_objects = mb_cache_count; + cache->c_shrink->scan_objects = mb_cache_scan; + cache->c_shrink->seeks = DEFAULT_SEEKS; + cache->c_shrink->private_data = cache; + + shrinker_register(cache->c_shrink); + INIT_WORK(&cache->c_shrink_work, mb_cache_shrink_worker); return cache; @@ -406,7 +409,7 @@ void mb_cache_destroy(struct mb_cache *cache) { struct mb_cache_entry *entry, *next; - unregister_shrinker(&cache->c_shrink); + shrinker_free(cache->c_shrink); /* * We don't bother with any locking. Cache must not be used at this From patchwork Thu Jul 27 08:04:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329437 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C9261C8E6 for ; Thu, 27 Jul 2023 08:13:52 +0000 (UTC) Received: from mail-pf1-x42e.google.com (mail-pf1-x42e.google.com [IPv6:2607:f8b0:4864:20::42e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1DE81448D for ; Thu, 27 Jul 2023 01:13:30 -0700 (PDT) Received: by mail-pf1-x42e.google.com with SMTP id d2e1a72fcca58-686f6231bdeso113678b3a.1 for ; Thu, 27 Jul 2023 01:13:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445563; x=1691050363; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=QelXbRgYcu/a7kVf8tT2xmPKs8Q6fhUGUeX576V7Nl8=; b=X2/dKeRh3K1ZUeUXRmYcuLAwkmDYhdwx9iwlPAtXfC0B4vHXtLguXST30gjNSIXFT7 OLt7OLAHNBNYpcouioFmzFwp83h1VVZBZI/b5TZHZteUiScXCbvweVFodKUOy9sCj8AV ZENggnGp80mAUTxGhU/fnzaRvZdNkV5cPcoIInnSny5prudiipt4/IqGTm49bA8p77kr 6rthKHnFEd97DZ60+ymFLTYrwmYvoXhejWrNb12L9I2KL1LTnT8oJzoHo7/LmyIBjEhr 5sNbvq2AFaPoM5/YQzjEzmuEQi5h7hErc8c8ASDByEVVMFkteQf8s6ncJNWVLrxavMEP hYjw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445563; x=1691050363; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=QelXbRgYcu/a7kVf8tT2xmPKs8Q6fhUGUeX576V7Nl8=; b=BF7XMxO97IwavhDPIP7dgTvUc2IBBod5pzxRdyMM41nHJspvMLGsIqQqp14jH95AGY uHuD5WjYIu/gOV8kWaiwVzTwIHRbjRjZ9mchZHOS1u0U8naIP9KYwmRSuIhc+Z2IYJAl 6Kf/JLijrV0ncXmSvjs84RnLDf1YyShabfLxNgINbq4OFJscik1Qig6Dft0lDeKba4r9 JAb9iv3C32RaM6yK9DYPmDHfKXg3z4XX01125FYwWaOQxbpLqc2IQRd3olQh1fCcy2Nw 1F1w2RQPgviyS1Pn+fGxojvs+i2ZNGDSsg0eQYWUvVaT6+2Pyn0GZRGMpfMjBah1DgTG W6gg== X-Gm-Message-State: ABy/qLYNVt1dv5IpGhSRqK1bU6iotMqIy+zPvf5XI5yRh2oPnia2s1AI r43UWwVyB43lVtPt0BSuh+yRXA== X-Google-Smtp-Source: APBJJlG3us3D1/FzajU+z+h8urvbqwZdl/1CQD95N0Bm05n475Xxe2FLYU/iNliwdKbEyGNSdPUcwg== X-Received: by 2002:a05:6a00:13a3:b0:676:2a5c:7bc5 with SMTP id t35-20020a056a0013a300b006762a5c7bc5mr5237596pfg.1.1690445563409; Thu, 27 Jul 2023 01:12:43 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.12.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:12:43 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v3 34/49] ext4: dynamically allocate the ext4-es shrinker Date: Thu, 27 Jul 2023 16:04:47 +0800 Message-Id: <20230727080502.77895-35-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the ext4-es shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct ext4_sb_info. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/ext4/ext4.h | 2 +- fs/ext4/extents_status.c | 22 ++++++++++++---------- 2 files changed, 13 insertions(+), 11 deletions(-) diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 1e2259d9967d..82397bf0b33e 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -1657,7 +1657,7 @@ struct ext4_sb_info { __u32 s_csum_seed; /* Reclaim extents from extent status tree */ - struct shrinker s_es_shrinker; + struct shrinker *s_es_shrinker; struct list_head s_es_list; /* List of inodes with reclaimable extents */ long s_es_nr_inode; struct ext4_es_stats s_es_stats; diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c index 9b5b8951afb4..74bb64fadbc4 100644 --- a/fs/ext4/extents_status.c +++ b/fs/ext4/extents_status.c @@ -1596,7 +1596,7 @@ static unsigned long ext4_es_count(struct shrinker *shrink, unsigned long nr; struct ext4_sb_info *sbi; - sbi = container_of(shrink, struct ext4_sb_info, s_es_shrinker); + sbi = shrink->private_data; nr = percpu_counter_read_positive(&sbi->s_es_stats.es_stats_shk_cnt); trace_ext4_es_shrink_count(sbi->s_sb, sc->nr_to_scan, nr); return nr; @@ -1605,8 +1605,7 @@ static unsigned long ext4_es_count(struct shrinker *shrink, static unsigned long ext4_es_scan(struct shrinker *shrink, struct shrink_control *sc) { - struct ext4_sb_info *sbi = container_of(shrink, - struct ext4_sb_info, s_es_shrinker); + struct ext4_sb_info *sbi = shrink->private_data; int nr_to_scan = sc->nr_to_scan; int ret, nr_shrunk; @@ -1690,14 +1689,17 @@ int ext4_es_register_shrinker(struct ext4_sb_info *sbi) if (err) goto err3; - sbi->s_es_shrinker.scan_objects = ext4_es_scan; - sbi->s_es_shrinker.count_objects = ext4_es_count; - sbi->s_es_shrinker.seeks = DEFAULT_SEEKS; - err = register_shrinker(&sbi->s_es_shrinker, "ext4-es:%s", - sbi->s_sb->s_id); - if (err) + sbi->s_es_shrinker = shrinker_alloc(0, "ext4-es:%s", sbi->s_sb->s_id); + if (!sbi->s_es_shrinker) goto err4; + sbi->s_es_shrinker->scan_objects = ext4_es_scan; + sbi->s_es_shrinker->count_objects = ext4_es_count; + sbi->s_es_shrinker->seeks = DEFAULT_SEEKS; + sbi->s_es_shrinker->private_data = sbi; + + shrinker_register(sbi->s_es_shrinker); + return 0; err4: percpu_counter_destroy(&sbi->s_es_stats.es_stats_shk_cnt); @@ -1716,7 +1718,7 @@ void ext4_es_unregister_shrinker(struct ext4_sb_info *sbi) percpu_counter_destroy(&sbi->s_es_stats.es_stats_cache_misses); percpu_counter_destroy(&sbi->s_es_stats.es_stats_all_cnt); percpu_counter_destroy(&sbi->s_es_stats.es_stats_shk_cnt); - unregister_shrinker(&sbi->s_es_shrinker); + shrinker_free(sbi->s_es_shrinker); } /* From patchwork Thu Jul 27 08:04:48 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329438 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5E44EC8C4 for ; Thu, 27 Jul 2023 08:14:32 +0000 (UTC) Received: from mail-pf1-x432.google.com (mail-pf1-x432.google.com [IPv6:2607:f8b0:4864:20::432]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B1A7D524F for ; Thu, 27 Jul 2023 01:14:10 -0700 (PDT) Received: by mail-pf1-x432.google.com with SMTP id d2e1a72fcca58-682ae5d4184so171527b3a.1 for ; Thu, 27 Jul 2023 01:14:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445576; x=1691050376; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=48waxWZGd1WUnLYaDrTSxvJywKXLcopaiUkWgt7j5Rg=; b=h7BzAXWMeO6q413o2q8QBGFyYtSJJQDVtscFkPudih7uYq32KqAohX6ko7JdrT58zZ jQesZevPWI16RJ584HoFfkctqZliFhC+Sy5DmGf4/p07EAXTPpKceV5c/mFhCQtFe2kc GT00j/8cVqT7gjAO9UrE6yMmEVq+vAOowivD6U/C54ThBKsCCzPpN8b7GVd2fZWCigOk vXp6v9qkHcNnCSidh0rHnK6MCacYxO0sYof9O+5/aUkm0GolyNtTHq/urdLytozqbZlU y5SGivZA8rDsT4B1CBykaduW0zvqtcacoHqzhUYbcvZiZaKGJdqILCFM7NZx5HG0wVY2 fpkw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445576; x=1691050376; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=48waxWZGd1WUnLYaDrTSxvJywKXLcopaiUkWgt7j5Rg=; b=h3+nzIuUDHK+uqnuydWMkfCjvfZLjBFZelkXaXKA+yCI7zlVCakQhCeGPt1xFPw/Bf Vm/a7Myu+CFRcZjAV2NHCQt0BQfipGEtAzxrYip8tL61V/IDijxkIVDbvVFQQZrn3so9 OLTl7+CGhK/GdBWTEcQix3FJDuMn9E6hGyiXC9Hqh2XgIBFElDhxXflBofa7uL16ZLvy dppdS/kjQK9U9BBcA6I7Q6g0PMMf8Y41frbNG7wiicCOtN2iCCf4BfTfRI2ALDDGeB9m OyBw8IbMOe4wPi8/Sn0K/rgedW7jyPp/76ZJVAjIa4clwch37yfFChDbdDYRFNgIiIFe tojg== X-Gm-Message-State: ABy/qLZJtnn6Zgb0AqadW7a7qnKvpmlFgurnjBuzQuaNYcZXC538AHUJ mI4YVGRQIuWvfgxiro+FNFh6cw== X-Google-Smtp-Source: APBJJlGlNC1VbP/jxEyWXSRyFxMRuhVQW95Y9Ngz7T3+dCe8qyleorovPEoXgtcixk5kZ4l7rZv1Dg== X-Received: by 2002:a05:6a00:4a10:b0:686:b990:560f with SMTP id do16-20020a056a004a1000b00686b990560fmr4386534pfb.2.1690445576006; Thu, 27 Jul 2023 01:12:56 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.12.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:12:55 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v3 35/49] jbd2,ext4: dynamically allocate the jbd2-journal shrinker Date: Thu, 27 Jul 2023 16:04:48 +0800 Message-Id: <20230727080502.77895-36-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the jbd2-journal shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct journal_s. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/jbd2/journal.c | 27 +++++++++++++++++---------- include/linux/jbd2.h | 2 +- 2 files changed, 18 insertions(+), 11 deletions(-) diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index 1b5a45ab62b0..4c421da03fee 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -1298,7 +1298,7 @@ static int jbd2_min_tag_size(void) static unsigned long jbd2_journal_shrink_scan(struct shrinker *shrink, struct shrink_control *sc) { - journal_t *journal = container_of(shrink, journal_t, j_shrinker); + journal_t *journal = shrink->private_data; unsigned long nr_to_scan = sc->nr_to_scan; unsigned long nr_shrunk; unsigned long count; @@ -1324,7 +1324,7 @@ static unsigned long jbd2_journal_shrink_scan(struct shrinker *shrink, static unsigned long jbd2_journal_shrink_count(struct shrinker *shrink, struct shrink_control *sc) { - journal_t *journal = container_of(shrink, journal_t, j_shrinker); + journal_t *journal = shrink->private_data; unsigned long count; count = percpu_counter_read_positive(&journal->j_checkpoint_jh_count); @@ -1412,19 +1412,26 @@ static journal_t *journal_init_common(struct block_device *bdev, journal->j_superblock = (journal_superblock_t *)bh->b_data; journal->j_shrink_transaction = NULL; - journal->j_shrinker.scan_objects = jbd2_journal_shrink_scan; - journal->j_shrinker.count_objects = jbd2_journal_shrink_count; - journal->j_shrinker.seeks = DEFAULT_SEEKS; - journal->j_shrinker.batch = journal->j_max_transaction_buffers; if (percpu_counter_init(&journal->j_checkpoint_jh_count, 0, GFP_KERNEL)) goto err_cleanup; - if (register_shrinker(&journal->j_shrinker, "jbd2-journal:(%u:%u)", - MAJOR(bdev->bd_dev), MINOR(bdev->bd_dev))) { + journal->j_shrinker = shrinker_alloc(0, "jbd2-journal:(%u:%u)", + MAJOR(bdev->bd_dev), + MINOR(bdev->bd_dev)); + if (!journal->j_shrinker) { percpu_counter_destroy(&journal->j_checkpoint_jh_count); goto err_cleanup; } + + journal->j_shrinker->scan_objects = jbd2_journal_shrink_scan; + journal->j_shrinker->count_objects = jbd2_journal_shrink_count; + journal->j_shrinker->seeks = DEFAULT_SEEKS; + journal->j_shrinker->batch = journal->j_max_transaction_buffers; + journal->j_shrinker->private_data = journal; + + shrinker_register(journal->j_shrinker); + return journal; err_cleanup: @@ -2187,9 +2194,9 @@ int jbd2_journal_destroy(journal_t *journal) brelse(journal->j_sb_buffer); } - if (journal->j_shrinker.flags & SHRINKER_REGISTERED) { + if (journal->j_shrinker) { percpu_counter_destroy(&journal->j_checkpoint_jh_count); - unregister_shrinker(&journal->j_shrinker); + shrinker_free(journal->j_shrinker); } if (journal->j_proc_entry) jbd2_stats_proc_exit(journal); diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h index 44c298aa58d4..beb4c4586320 100644 --- a/include/linux/jbd2.h +++ b/include/linux/jbd2.h @@ -891,7 +891,7 @@ struct journal_s * Journal head shrinker, reclaim buffer's journal head which * has been written back. */ - struct shrinker j_shrinker; + struct shrinker *j_shrinker; /** * @j_checkpoint_jh_count: From patchwork Thu Jul 27 08:04:49 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329440 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2D668D303 for ; Thu, 27 Jul 2023 08:14:43 +0000 (UTC) Received: from mail-pf1-x433.google.com (mail-pf1-x433.google.com [IPv6:2607:f8b0:4864:20::433]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 887336599 for ; Thu, 27 Jul 2023 01:14:22 -0700 (PDT) Received: by mail-pf1-x433.google.com with SMTP id d2e1a72fcca58-686f74a8992so78280b3a.1 for ; Thu, 27 Jul 2023 01:14:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445588; x=1691050388; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=SQyM2U1mZ/Gwc1nAOvYev1L9XLZmdJlRT0RgZ5HuwGo=; b=kd6rt5g6FvxszAExAWwDvnGLZ3nlFI6+LjpyYA2SwsBpfxyntyz5JxeLs4IsuFoqam BPrbW0IZbPo4bp5jr8CP6dW+kXsV2/xzlGqHNQMPkgHqzMSniXcziiHnCVK42nJM1noq S50aGwia7MX8euX+8hfeRRERjX2qwSrJrcd+yJ4VULel6DaWSf6W0hZ/qFtzG1N+JN0n uQB95m4CN8ZeNY7Xsu+pZiPFb9O3G4aVUw6FAsCxKpZx+yuB9vunfivBBZ8XUQHuWQvc AX+QkUyO8AP8Aa2+4wftvFDhdV62VUn8gnj7NjCNsCf/vREHbdt8IjenIeReKEgqNeKN BvoA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445588; x=1691050388; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=SQyM2U1mZ/Gwc1nAOvYev1L9XLZmdJlRT0RgZ5HuwGo=; b=gLxgwFP2mbqtj3Qn9W7IZwvUVTslmiunU+j8pRuW2Pk3ORNVPS+DOx9dUvmD6yiW9l uUu7hkIq5F7mKFTyw9aCuybNF72LkbSmOkYXh/BZkC8bSdXUJteSXnc6vz5yDtj0aCbv 1DlWGDvudueC3vrfE9IJM4Y4EjnV9Q/q7pDfEPzS891wXjQ65RYt4ZYI0p7sqf1x6cZS SrYbgYkCpWIWmGxbWzeusI9JE2lvPKkz/OoAdu93ehSGunIULs00Tu7RBYl9r34B/eYI AVpHMEorRgyxkIZgs3jr4+sZ6nZshGJNFpC7c3NRi45T2DGBKub2xFG+TwpOgoU3H7WX FUSw== X-Gm-Message-State: ABy/qLZN7W/zlXSjLpNQUlIXPVYJRUMd1LwBhN0F+bC+0NoECKoaNAax B09971ohq+JvH0hJd/Px53TAdg== X-Google-Smtp-Source: APBJJlGx3t3etMepgJMVu+n+Us77oI88lCmbMpzaxwGd8c6y1MJ13X5vnrHVztpBTHVV1RS/gpzzOQ== X-Received: by 2002:a05:6a21:3281:b0:137:514a:982d with SMTP id yt1-20020a056a21328100b00137514a982dmr6062167pzb.6.1690445588272; Thu, 27 Jul 2023 01:13:08 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.12.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:13:07 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Chuck Lever , Jeff Layton Subject: [PATCH v3 36/49] nfsd: dynamically allocate the nfsd-client shrinker Date: Thu, 27 Jul 2023 16:04:49 +0800 Message-Id: <20230727080502.77895-37-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the nfsd-client shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct nfsd_net. Signed-off-by: Qi Zheng Acked-by: Chuck Lever Acked-by: Jeff Layton --- fs/nfsd/netns.h | 2 +- fs/nfsd/nfs4state.c | 20 ++++++++++++-------- 2 files changed, 13 insertions(+), 9 deletions(-) diff --git a/fs/nfsd/netns.h b/fs/nfsd/netns.h index ec49b200b797..f669444d5336 100644 --- a/fs/nfsd/netns.h +++ b/fs/nfsd/netns.h @@ -195,7 +195,7 @@ struct nfsd_net { int nfs4_max_clients; atomic_t nfsd_courtesy_clients; - struct shrinker nfsd_client_shrinker; + struct shrinker *nfsd_client_shrinker; struct work_struct nfsd_shrinker_work; }; diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index ef7118ebee00..75334a43ded4 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -4388,8 +4388,7 @@ static unsigned long nfsd4_state_shrinker_count(struct shrinker *shrink, struct shrink_control *sc) { int count; - struct nfsd_net *nn = container_of(shrink, - struct nfsd_net, nfsd_client_shrinker); + struct nfsd_net *nn = shrink->private_data; count = atomic_read(&nn->nfsd_courtesy_clients); if (!count) @@ -8123,12 +8122,17 @@ static int nfs4_state_create_net(struct net *net) INIT_WORK(&nn->nfsd_shrinker_work, nfsd4_state_shrinker_worker); get_net(net); - nn->nfsd_client_shrinker.scan_objects = nfsd4_state_shrinker_scan; - nn->nfsd_client_shrinker.count_objects = nfsd4_state_shrinker_count; - nn->nfsd_client_shrinker.seeks = DEFAULT_SEEKS; - - if (register_shrinker(&nn->nfsd_client_shrinker, "nfsd-client")) + nn->nfsd_client_shrinker = shrinker_alloc(0, "nfsd-client"); + if (!nn->nfsd_client_shrinker) goto err_shrinker; + + nn->nfsd_client_shrinker->scan_objects = nfsd4_state_shrinker_scan; + nn->nfsd_client_shrinker->count_objects = nfsd4_state_shrinker_count; + nn->nfsd_client_shrinker->seeks = DEFAULT_SEEKS; + nn->nfsd_client_shrinker->private_data = nn; + + shrinker_register(nn->nfsd_client_shrinker); + return 0; err_shrinker: @@ -8226,7 +8230,7 @@ nfs4_state_shutdown_net(struct net *net) struct list_head *pos, *next, reaplist; struct nfsd_net *nn = net_generic(net, nfsd_net_id); - unregister_shrinker(&nn->nfsd_client_shrinker); + shrinker_free(nn->nfsd_client_shrinker); cancel_work(&nn->nfsd_shrinker_work); cancel_delayed_work_sync(&nn->laundromat_work); locks_end_grace(&nn->nfsd4_manager); From patchwork Thu Jul 27 08:04:50 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329545 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 08164C8EC for ; Thu, 27 Jul 2023 08:19:32 +0000 (UTC) Received: from mail-pf1-f181.google.com (mail-pf1-f181.google.com [209.85.210.181]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 908F32D47 for ; Thu, 27 Jul 2023 01:19:16 -0700 (PDT) Received: by mail-pf1-f181.google.com with SMTP id d2e1a72fcca58-66d6a9851f3so168666b3a.0 for ; Thu, 27 Jul 2023 01:19:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445600; x=1691050400; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=f+7Rjo519K3FhaZ9jqPWNUITMom2L2BqSXFVMuCYJXE=; b=iCbLBUqUt9Nmpfx9vnMv71z6ZoxeAA3Kwx+3hOoXd1GaTMzDfIKBdQZJLnwkBZI0pa Lp64e3iwzE/rImCGGIb1ibgUBPxOPSIGFFuuYRtSxlo+aqH0+DTZDA4mGtoxEeFwJjn7 eVXRc7yr9jM32bf+/xn99rZxVedfvtJlhFw9fGMGNkAD3ORupJUg3X+ANXG24/AH/vl7 jpmLaXt1oCEYJ/yvLZ0XDwvzYMWndPPs0hfwCexWDUJDE/XQyc02dMzlI6K63u7Ep8SN XNSeVfJxqvuXvz57tL/Yxcln+9J35CIKIXgWOW2mH/cpcfLsA9vX9cNULDu6wCRYP4Zg 0nEA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445600; x=1691050400; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=f+7Rjo519K3FhaZ9jqPWNUITMom2L2BqSXFVMuCYJXE=; b=CDNNWi8DLxfm7rMjzVZE3MUSHaFyRKyBHp2Uhn7oDBbGtrOSPOjdH1xrxyvnQX+G2O WJY2qSP14hu1zurzJLWL9RWrw5vCXoNOegHZzD+nQ4HmOAeeurdBz/OxOP/AbevQRXpd HBMo1fmvA6hc4dMAsjjeVRTlRmvxf5/2G4UiHFMq7GHKIw7FZKr5p8PnQcFKnWVx9Llu CCaBQTGTUz9NFcINIUS4v7Tc4brj2ynKeGxTX5RXdnCKSqkKFB4L62Ppspduq4AT1HgA KAju2hGLNg5asvZeSGmTt3Tk1aVax7JGs0H3F9Isuqe8cxW8erWFaZZLPuhNfNVs2nbm pWhg== X-Gm-Message-State: ABy/qLZYOyvrXa3FtW7DCU5SIwjSJrH5tF9DxDM4Ja/vG7lgVuwHaYpj zZpJTG51/hBx0PQo68A3Q9Anfw== X-Google-Smtp-Source: APBJJlFVIfpGcg6LJptv9vKKDXXp5NoXAxRgeIF2Co73Rpi3BTRYlDiWRgj+jM16dBQ5q2UaSpGRNg== X-Received: by 2002:a05:6a20:729a:b0:100:b92b:e8be with SMTP id o26-20020a056a20729a00b00100b92be8bemr5583609pzk.2.1690445600629; Thu, 27 Jul 2023 01:13:20 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.13.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:13:20 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Chuck Lever , Jeff Layton Subject: [PATCH v3 37/49] nfsd: dynamically allocate the nfsd-reply shrinker Date: Thu, 27 Jul 2023 16:04:50 +0800 Message-Id: <20230727080502.77895-38-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_NONE, T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the nfsd-reply shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct nfsd_net. Signed-off-by: Qi Zheng Acked-by: Chuck Lever Acked-by: Jeff Layton --- fs/nfsd/netns.h | 2 +- fs/nfsd/nfscache.c | 31 ++++++++++++++++--------------- 2 files changed, 17 insertions(+), 16 deletions(-) diff --git a/fs/nfsd/netns.h b/fs/nfsd/netns.h index f669444d5336..ab303a8b77d5 100644 --- a/fs/nfsd/netns.h +++ b/fs/nfsd/netns.h @@ -177,7 +177,7 @@ struct nfsd_net { /* size of cache when we saw the longest hash chain */ unsigned int longest_chain_cachesize; - struct shrinker nfsd_reply_cache_shrinker; + struct shrinker *nfsd_reply_cache_shrinker; /* tracking server-to-server copy mounts */ spinlock_t nfsd_ssc_lock; diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c index 80621a709510..fd56a52aa5fb 100644 --- a/fs/nfsd/nfscache.c +++ b/fs/nfsd/nfscache.c @@ -201,26 +201,29 @@ int nfsd_reply_cache_init(struct nfsd_net *nn) { unsigned int hashsize; unsigned int i; - int status = 0; nn->max_drc_entries = nfsd_cache_size_limit(); atomic_set(&nn->num_drc_entries, 0); hashsize = nfsd_hashsize(nn->max_drc_entries); nn->maskbits = ilog2(hashsize); - nn->nfsd_reply_cache_shrinker.scan_objects = nfsd_reply_cache_scan; - nn->nfsd_reply_cache_shrinker.count_objects = nfsd_reply_cache_count; - nn->nfsd_reply_cache_shrinker.seeks = 1; - status = register_shrinker(&nn->nfsd_reply_cache_shrinker, - "nfsd-reply:%s", nn->nfsd_name); - if (status) - return status; - nn->drc_hashtbl = kvzalloc(array_size(hashsize, sizeof(*nn->drc_hashtbl)), GFP_KERNEL); if (!nn->drc_hashtbl) + return -ENOMEM; + + nn->nfsd_reply_cache_shrinker = shrinker_alloc(0, "nfsd-reply:%s", + nn->nfsd_name); + if (!nn->nfsd_reply_cache_shrinker) goto out_shrinker; + nn->nfsd_reply_cache_shrinker->scan_objects = nfsd_reply_cache_scan; + nn->nfsd_reply_cache_shrinker->count_objects = nfsd_reply_cache_count; + nn->nfsd_reply_cache_shrinker->seeks = 1; + nn->nfsd_reply_cache_shrinker->private_data = nn; + + shrinker_register(nn->nfsd_reply_cache_shrinker); + for (i = 0; i < hashsize; i++) { INIT_LIST_HEAD(&nn->drc_hashtbl[i].lru_head); spin_lock_init(&nn->drc_hashtbl[i].cache_lock); @@ -229,7 +232,7 @@ int nfsd_reply_cache_init(struct nfsd_net *nn) return 0; out_shrinker: - unregister_shrinker(&nn->nfsd_reply_cache_shrinker); + kvfree(nn->drc_hashtbl); printk(KERN_ERR "nfsd: failed to allocate reply cache\n"); return -ENOMEM; } @@ -239,7 +242,7 @@ void nfsd_reply_cache_shutdown(struct nfsd_net *nn) struct nfsd_cacherep *rp; unsigned int i; - unregister_shrinker(&nn->nfsd_reply_cache_shrinker); + shrinker_free(nn->nfsd_reply_cache_shrinker); for (i = 0; i < nn->drc_hashsize; i++) { struct list_head *head = &nn->drc_hashtbl[i].lru_head; @@ -323,8 +326,7 @@ nfsd_prune_bucket_locked(struct nfsd_net *nn, struct nfsd_drc_bucket *b, static unsigned long nfsd_reply_cache_count(struct shrinker *shrink, struct shrink_control *sc) { - struct nfsd_net *nn = container_of(shrink, - struct nfsd_net, nfsd_reply_cache_shrinker); + struct nfsd_net *nn = shrink->private_data; return atomic_read(&nn->num_drc_entries); } @@ -343,8 +345,7 @@ nfsd_reply_cache_count(struct shrinker *shrink, struct shrink_control *sc) static unsigned long nfsd_reply_cache_scan(struct shrinker *shrink, struct shrink_control *sc) { - struct nfsd_net *nn = container_of(shrink, - struct nfsd_net, nfsd_reply_cache_shrinker); + struct nfsd_net *nn = shrink->private_data; unsigned long freed = 0; LIST_HEAD(dispose); unsigned int i; From patchwork Thu Jul 27 08:04:51 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329439 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2EB50C8EC for ; Thu, 27 Jul 2023 08:14:39 +0000 (UTC) Received: from mail-pf1-x435.google.com (mail-pf1-x435.google.com [IPv6:2607:f8b0:4864:20::435]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0854346A0 for ; Thu, 27 Jul 2023 01:14:19 -0700 (PDT) Received: by mail-pf1-x435.google.com with SMTP id d2e1a72fcca58-686f74a8992so78397b3a.1 for ; Thu, 27 Jul 2023 01:14:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445613; x=1691050413; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=jaqVlo27zysQOw4inLaa7RWYi61naAqQm5GJ5upJpN4=; b=AiXoaCJQdjYD9eYmeEdrfJ7ezATe9Yx6/bwBgW+5G+EPOMCuXYwEAcwi/JFENHTjN3 RLofwFvJd4EkqfH7Ye6KmIjKXgnfjEMN6IQZZPzERz8d2kaa1LDxbOfy1pXfbOXi//fW yPmgpOzP5ISM/DRd0jetvScx//7ssTCBUe2enciakCKenXGhXZrdb9q6vjgbH3ZMQFpH R1cJwZwEOETjjGMipjwgI0l9uWlKWu8vb1MB9swWpnARqP7hyemEh7msGfN9mYd5xYpI D03dkm0FvaoEJlj9bRrg4eXRdtCSaQUY5I5xaJER5wRv+adUsRWUp3ZNy7xFaIahEhPe Q+Lw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445613; x=1691050413; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=jaqVlo27zysQOw4inLaa7RWYi61naAqQm5GJ5upJpN4=; b=E2t+ElH4+OYop2Z10uTv7Vb1cNfJKbvtaCyZUntUyPUsUkCfzpAODsw1OWTJh3g+eZ LYTkAejAAhRKmpsJbnFigQqwPbUV1Nhne48qJkE78/30DhgSkPZrRrch8DPU3kEZr1gl VD5dBmmCgBcb7CaKbQ34EShgntiCMWHoyvqr3wetxmsUBAjfag9anCAAJbL8MksnGf/y g67k/znHe9BVdGFlrn1RAGIbXx/ExlBRz3c5xl8hAwICjE/Fqfgx9mdsjbw6JvV910Hp S4C8yNDIu1yWkW+vxI8uYDMYCNE7VfxGSsQ9PiSDAra9p0Jsoh40/zHAFh41bxm5KWA8 1kKQ== X-Gm-Message-State: ABy/qLbiiQRNG3SDA+8sOWY28JCdYNtOdyOZ6xmV8bi19B8Xnuc1n7sV VNVrQ75wteLZBxHsZV3bC+imJQ== X-Google-Smtp-Source: APBJJlG+tRTw+eNG8sDYXmQBYWrWDa50m7E6kRjtDYwVrWUQOS5ovTAWRl9t0zD5rxSD0dIJ86GpuQ== X-Received: by 2002:a05:6a00:2d82:b0:675:8627:a291 with SMTP id fb2-20020a056a002d8200b006758627a291mr4587660pfb.3.1690445613284; Thu, 27 Jul 2023 01:13:33 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.13.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:13:32 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v3 38/49] xfs: dynamically allocate the xfs-buf shrinker Date: Thu, 27 Jul 2023 16:04:51 +0800 Message-Id: <20230727080502.77895-39-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the xfs-buf shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct xfs_buftarg. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/xfs/xfs_buf.c | 25 ++++++++++++++----------- fs/xfs/xfs_buf.h | 2 +- 2 files changed, 15 insertions(+), 12 deletions(-) diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c index 15d1e5a7c2d3..715730fc91cb 100644 --- a/fs/xfs/xfs_buf.c +++ b/fs/xfs/xfs_buf.c @@ -1906,8 +1906,7 @@ xfs_buftarg_shrink_scan( struct shrinker *shrink, struct shrink_control *sc) { - struct xfs_buftarg *btp = container_of(shrink, - struct xfs_buftarg, bt_shrinker); + struct xfs_buftarg *btp = shrink->private_data; LIST_HEAD(dispose); unsigned long freed; @@ -1929,8 +1928,7 @@ xfs_buftarg_shrink_count( struct shrinker *shrink, struct shrink_control *sc) { - struct xfs_buftarg *btp = container_of(shrink, - struct xfs_buftarg, bt_shrinker); + struct xfs_buftarg *btp = shrink->private_data; return list_lru_shrink_count(&btp->bt_lru, sc); } @@ -1938,7 +1936,7 @@ void xfs_free_buftarg( struct xfs_buftarg *btp) { - unregister_shrinker(&btp->bt_shrinker); + shrinker_free(btp->bt_shrinker); ASSERT(percpu_counter_sum(&btp->bt_io_count) == 0); percpu_counter_destroy(&btp->bt_io_count); list_lru_destroy(&btp->bt_lru); @@ -2021,13 +2019,18 @@ xfs_alloc_buftarg( if (percpu_counter_init(&btp->bt_io_count, 0, GFP_KERNEL)) goto error_lru; - btp->bt_shrinker.count_objects = xfs_buftarg_shrink_count; - btp->bt_shrinker.scan_objects = xfs_buftarg_shrink_scan; - btp->bt_shrinker.seeks = DEFAULT_SEEKS; - btp->bt_shrinker.flags = SHRINKER_NUMA_AWARE; - if (register_shrinker(&btp->bt_shrinker, "xfs-buf:%s", - mp->m_super->s_id)) + btp->bt_shrinker = shrinker_alloc(SHRINKER_NUMA_AWARE, "xfs-buf:%s", + mp->m_super->s_id); + if (!btp->bt_shrinker) goto error_pcpu; + + btp->bt_shrinker->count_objects = xfs_buftarg_shrink_count; + btp->bt_shrinker->scan_objects = xfs_buftarg_shrink_scan; + btp->bt_shrinker->seeks = DEFAULT_SEEKS; + btp->bt_shrinker->private_data = btp; + + shrinker_register(btp->bt_shrinker); + return btp; error_pcpu: diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h index 549c60942208..4e6969a675f7 100644 --- a/fs/xfs/xfs_buf.h +++ b/fs/xfs/xfs_buf.h @@ -102,7 +102,7 @@ typedef struct xfs_buftarg { size_t bt_logical_sectormask; /* LRU control structures */ - struct shrinker bt_shrinker; + struct shrinker *bt_shrinker; struct list_lru bt_lru; struct percpu_counter bt_io_count; From patchwork Thu Jul 27 08:04:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329441 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DD3C211189 for ; Thu, 27 Jul 2023 08:14:46 +0000 (UTC) Received: from mail-pf1-x42e.google.com (mail-pf1-x42e.google.com [IPv6:2607:f8b0:4864:20::42e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E7B4C7EDC for ; Thu, 27 Jul 2023 01:14:26 -0700 (PDT) Received: by mail-pf1-x42e.google.com with SMTP id d2e1a72fcca58-66d6a9851f3so168742b3a.0 for ; Thu, 27 Jul 2023 01:14:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445625; x=1691050425; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=vAE6p5mA5n3yxm+4IPfXfMLc8MGv4J5wg3qHubren08=; b=dkRrWVkSv9/U3+e6QsQd29dMPuttcg2M13ZLMDEEIMbfSamBJHJdLtNY2sbEZ+YzhY 5BtYLYzutGknAA+e956eNSlbl7nK+9UwGbTk4YjZb6fHHFpCk0FXoHpJAi6M0jM7aFZF +CarAybA7Fmb9F2zoNtgG1DfzDYBp6eqgkICDj2Asy83tRT0LF5pvIpkdtR75UYStLmf 37kqliTWk9DV3Fw2NufQf0BV5/WVkKX05IEilefRJ/OwJCaH2LBTkZCCI3ZIC5RNHqLc p1thIF8tkbzc9m+CHBYGB6mtVDqiYNqHlAVUDSIfQN8XwfU9rYwJVwEXJvC3bJUByZYt Gdag== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445625; x=1691050425; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=vAE6p5mA5n3yxm+4IPfXfMLc8MGv4J5wg3qHubren08=; b=Xubsj8bQ2O6mmyk+SnhdwztPdIZ4uoWwvqiBbLVFizqZDHxxRskNDYa+9xKLA2h5hJ JtyQB6g27z7KRqElu2r7CU53zB7E3IsNusQhbexSVpNICornCKYOhqQjEKdzjrhK8vFj Hh0vQp71qQIksslCycKIsHf5E/6WymO2Sc7f/YbQ7kkfC0d7X5XLI7vlnJW9oSp1BoCB AW3Lbd9gMA4NWVKiRisj3dGp0hSRHZZZRY6OX/GhoEjzeNN55szfy+QalsWiMEboogrs lbMrXlzhHPpPM4NqTtGC2+zDLz1s+v4oQfwszxS/bbY3U3Fx2/UPJkx8q839kLe/IXjw KBmA== X-Gm-Message-State: ABy/qLbniAHSKqbiAkLD1bRGjRDvBjAnQg42A06cfDwehAILX+HOALMg Srf7/cu+Ojp5xIftMUsFGN1ImQ== X-Google-Smtp-Source: APBJJlGsGKc/yd3ypxFPLcm5JieT1oixTNIsPQhWBcbXzQEArQwAQppjIOSAREcWHLbqRGZH8ALcGA== X-Received: by 2002:a05:6a20:7d87:b0:12e:f6e6:882b with SMTP id v7-20020a056a207d8700b0012ef6e6882bmr6446407pzj.1.1690445625322; Thu, 27 Jul 2023 01:13:45 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.13.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:13:44 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v3 39/49] xfs: dynamically allocate the xfs-inodegc shrinker Date: Thu, 27 Jul 2023 16:04:52 +0800 Message-Id: <20230727080502.77895-40-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the xfs-inodegc shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct xfs_mount. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/xfs/xfs_icache.c | 26 +++++++++++++++----------- fs/xfs/xfs_mount.c | 4 ++-- fs/xfs/xfs_mount.h | 2 +- 3 files changed, 18 insertions(+), 14 deletions(-) diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c index 453890942d9f..751c380afd5a 100644 --- a/fs/xfs/xfs_icache.c +++ b/fs/xfs/xfs_icache.c @@ -2225,8 +2225,7 @@ xfs_inodegc_shrinker_count( struct shrinker *shrink, struct shrink_control *sc) { - struct xfs_mount *mp = container_of(shrink, struct xfs_mount, - m_inodegc_shrinker); + struct xfs_mount *mp = shrink->private_data; struct xfs_inodegc *gc; int cpu; @@ -2247,8 +2246,7 @@ xfs_inodegc_shrinker_scan( struct shrinker *shrink, struct shrink_control *sc) { - struct xfs_mount *mp = container_of(shrink, struct xfs_mount, - m_inodegc_shrinker); + struct xfs_mount *mp = shrink->private_data; struct xfs_inodegc *gc; int cpu; bool no_items = true; @@ -2284,13 +2282,19 @@ int xfs_inodegc_register_shrinker( struct xfs_mount *mp) { - struct shrinker *shrink = &mp->m_inodegc_shrinker; + mp->m_inodegc_shrinker = shrinker_alloc(SHRINKER_NONSLAB, + "xfs-inodegc:%s", + mp->m_super->s_id); + if (!mp->m_inodegc_shrinker) + return -ENOMEM; + + mp->m_inodegc_shrinker->count_objects = xfs_inodegc_shrinker_count; + mp->m_inodegc_shrinker->scan_objects = xfs_inodegc_shrinker_scan; + mp->m_inodegc_shrinker->seeks = 0; + mp->m_inodegc_shrinker->batch = XFS_INODEGC_SHRINKER_BATCH; + mp->m_inodegc_shrinker->private_data = mp; - shrink->count_objects = xfs_inodegc_shrinker_count; - shrink->scan_objects = xfs_inodegc_shrinker_scan; - shrink->seeks = 0; - shrink->flags = SHRINKER_NONSLAB; - shrink->batch = XFS_INODEGC_SHRINKER_BATCH; + shrinker_register(mp->m_inodegc_shrinker); - return register_shrinker(shrink, "xfs-inodegc:%s", mp->m_super->s_id); + return 0; } diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index fb87ffb48f7f..640d09891a4e 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -1018,7 +1018,7 @@ xfs_mountfs( out_log_dealloc: xfs_log_mount_cancel(mp); out_inodegc_shrinker: - unregister_shrinker(&mp->m_inodegc_shrinker); + shrinker_free(mp->m_inodegc_shrinker); out_fail_wait: if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) xfs_buftarg_drain(mp->m_logdev_targp); @@ -1100,7 +1100,7 @@ xfs_unmountfs( #if defined(DEBUG) xfs_errortag_clearall(mp); #endif - unregister_shrinker(&mp->m_inodegc_shrinker); + shrinker_free(mp->m_inodegc_shrinker); xfs_free_perag(mp); xfs_errortag_del(mp); diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index e2866e7fa60c..562c294ca08e 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -217,7 +217,7 @@ typedef struct xfs_mount { atomic_t m_agirotor; /* last ag dir inode alloced */ /* Memory shrinker to throttle and reprioritize inodegc */ - struct shrinker m_inodegc_shrinker; + struct shrinker *m_inodegc_shrinker; /* * Workqueue item so that we can coalesce multiple inode flush attempts * into a single flush. From patchwork Thu Jul 27 08:04:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329443 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EB367100BD for ; Thu, 27 Jul 2023 08:14:55 +0000 (UTC) Received: from mail-pf1-x435.google.com (mail-pf1-x435.google.com [IPv6:2607:f8b0:4864:20::435]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F11D283D0 for ; Thu, 27 Jul 2023 01:14:39 -0700 (PDT) Received: by mail-pf1-x435.google.com with SMTP id d2e1a72fcca58-686f6231bdeso113899b3a.1 for ; Thu, 27 Jul 2023 01:14:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445637; x=1691050437; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=wkWZ9/xaCXa97bQ5JXnZc5xW9B3SNGrJMT1hKcCw6ws=; b=EDfCdETq+fWum4Z4rVmLJcfO1jsg67VgnqiA/czndVSbNlSpbiLUxCCQQbrycQZD4N jQ6ZzEztmrAV1/GQh0DPbs4MerEzMqTN5oUJT+1JgEVVCAFedy/wmgVhs7WN/b/b654/ J3bWoofyGEQUeJzT2evHimB9xJj54scgZA3ezNM1eyl//hvUHn6qW8m2jc5RxZ9Q53pq qjYZmev8IqT72hXdHUOA71yDJ6nyeNuVcIJzjtWGkynPPHPpyqKgHAKZWC3Im8l22hhd 2mNa6yYVElvUfcaQGhKZMnwewb3KL70R9vxxm9ctoitBRKZ5V08UPUQRdkaKB4nkVDWK NCpQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445637; x=1691050437; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=wkWZ9/xaCXa97bQ5JXnZc5xW9B3SNGrJMT1hKcCw6ws=; b=HnYagP+buMhLqtg7jsQw0ikbNJ3LO6zKdXHCKMxaEn4hqi0jvMhsgYHGfvjfCzJ1Z+ D5Yt2kYB4EF9cKwsnKeYtoHwqtD1tnP6bdmcmZ2iK/COXIKcOd6ZL3N9zWpTAVQQ82Nj yNo8t/9ndwJgTakH252Bd50DzT4PAPrWPDvntaABXLh+9Mca7Jc7AoXVOp7fz2lxcTpB DKmqW3xZFK/uh096G5Qd59vVphlGZ9hGPQ+DnQOJZVCgBuFYmcXhcV1bQEvaQu9kwk91 v/z+0e+PnzS0f94kKp4xskInCAn3hD54Q+BKxx00dKw5ea7EhihlLLm4jC+o3rsjXXdv fTbA== X-Gm-Message-State: ABy/qLYQ1CpxZ+Ojia19hfNHsSOyC+krriNfCYvcqMeeh2qPubZlQKzN KqKsOq6OK2m0JNlXdRtn9RDEsA== X-Google-Smtp-Source: APBJJlHv3kehM44VAWCca2syD2CKM7i434EcumRqZh5gO/U3rxv+9ZnIssQP5Ien17rj+O8gWl3H0Q== X-Received: by 2002:a05:6a00:1586:b0:67f:8ef5:2643 with SMTP id u6-20020a056a00158600b0067f8ef52643mr5213351pfk.2.1690445637383; Thu, 27 Jul 2023 01:13:57 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.13.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:13:57 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v3 40/49] xfs: dynamically allocate the xfs-qm shrinker Date: Thu, 27 Jul 2023 16:04:53 +0800 Message-Id: <20230727080502.77895-41-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the xfs-qm shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct xfs_quotainfo. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/xfs/xfs_qm.c | 26 +++++++++++++------------- fs/xfs/xfs_qm.h | 2 +- 2 files changed, 14 insertions(+), 14 deletions(-) diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c index 6abcc34fafd8..032f0a208bd2 100644 --- a/fs/xfs/xfs_qm.c +++ b/fs/xfs/xfs_qm.c @@ -504,8 +504,7 @@ xfs_qm_shrink_scan( struct shrinker *shrink, struct shrink_control *sc) { - struct xfs_quotainfo *qi = container_of(shrink, - struct xfs_quotainfo, qi_shrinker); + struct xfs_quotainfo *qi = shrink->private_data; struct xfs_qm_isolate isol; unsigned long freed; int error; @@ -539,8 +538,7 @@ xfs_qm_shrink_count( struct shrinker *shrink, struct shrink_control *sc) { - struct xfs_quotainfo *qi = container_of(shrink, - struct xfs_quotainfo, qi_shrinker); + struct xfs_quotainfo *qi = shrink->private_data; return list_lru_shrink_count(&qi->qi_lru, sc); } @@ -680,16 +678,18 @@ xfs_qm_init_quotainfo( if (XFS_IS_PQUOTA_ON(mp)) xfs_qm_set_defquota(mp, XFS_DQTYPE_PROJ, qinf); - qinf->qi_shrinker.count_objects = xfs_qm_shrink_count; - qinf->qi_shrinker.scan_objects = xfs_qm_shrink_scan; - qinf->qi_shrinker.seeks = DEFAULT_SEEKS; - qinf->qi_shrinker.flags = SHRINKER_NUMA_AWARE; - - error = register_shrinker(&qinf->qi_shrinker, "xfs-qm:%s", - mp->m_super->s_id); - if (error) + qinf->qi_shrinker = shrinker_alloc(SHRINKER_NUMA_AWARE, "xfs-qm:%s", + mp->m_super->s_id); + if (!qinf->qi_shrinker) goto out_free_inos; + qinf->qi_shrinker->count_objects = xfs_qm_shrink_count; + qinf->qi_shrinker->scan_objects = xfs_qm_shrink_scan; + qinf->qi_shrinker->seeks = DEFAULT_SEEKS; + qinf->qi_shrinker->private_data = qinf; + + shrinker_register(qinf->qi_shrinker); + return 0; out_free_inos: @@ -718,7 +718,7 @@ xfs_qm_destroy_quotainfo( qi = mp->m_quotainfo; ASSERT(qi != NULL); - unregister_shrinker(&qi->qi_shrinker); + shrinker_free(qi->qi_shrinker); list_lru_destroy(&qi->qi_lru); xfs_qm_destroy_quotainos(qi); mutex_destroy(&qi->qi_tree_lock); diff --git a/fs/xfs/xfs_qm.h b/fs/xfs/xfs_qm.h index 9683f0457d19..d5c9fc4ba591 100644 --- a/fs/xfs/xfs_qm.h +++ b/fs/xfs/xfs_qm.h @@ -63,7 +63,7 @@ struct xfs_quotainfo { struct xfs_def_quota qi_usr_default; struct xfs_def_quota qi_grp_default; struct xfs_def_quota qi_prj_default; - struct shrinker qi_shrinker; + struct shrinker *qi_shrinker; /* Minimum and maximum quota expiration timestamp values. */ time64_t qi_expiry_min; From patchwork Thu Jul 27 08:04:54 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329446 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AE78E154A9 for ; Thu, 27 Jul 2023 08:15:02 +0000 (UTC) Received: from mail-pf1-x42e.google.com (mail-pf1-x42e.google.com [IPv6:2607:f8b0:4864:20::42e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 14D9583ED for ; Thu, 27 Jul 2023 01:14:47 -0700 (PDT) Received: by mail-pf1-x42e.google.com with SMTP id d2e1a72fcca58-6862d4a1376so189783b3a.0 for ; Thu, 27 Jul 2023 01:14:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445649; x=1691050449; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=sPvPF+4cfnCSPpn5pwfgQmnhLHHD8eUNQAmayNodhE0=; b=YUtSHImzHFhUVx7c3A38/9eSWP8Y2UYGj1FAohSpraRjdigKG79oH7xXGVv/st6Oxo VyXpyLT7a2poDQM1BLbe2YZ2f+F4NjGwYTjXKgOmjtdNRT3EltoPRUERX0NGCPGwABx/ guLbSxl8SczSn7UsZFsKIT2jSYiALWPELONV4dGxl+BgYW8LTo4BMAXY89ObnQ5bwB+z TeqwZ6TJLFD7PjgbTEQMgvSuaTCzQbN9MksnEsjGQ7GcxsQYflnPZl/UkK6mnnTiCX+x HfuT7U9+62kKpSnlvuoFhz2dd+gEGZ79L6Z5RTD7Q/dArvGRObCoRNap6LnHLL+kySjl YAWg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445649; x=1691050449; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=sPvPF+4cfnCSPpn5pwfgQmnhLHHD8eUNQAmayNodhE0=; b=XBi5Luvf1qaHOwQdP1XQ9uFz5g3QXK4b3yb7b8cRQKo+trZAAhk53KJKkyOVEPQxdi ivVnUepnvbsla2coKzcEOXmlFFSYUopHai9KbYnV8KoIjI73Mb3wdrdHyAeST59jj+Yl yoLNXycTG/vpAUKwpTHXVnZ9FBdCWEKY9IECoHgCnDZcG9u1t8ariRU8hXs1xlWG7JrG iPvg1+3Ts2EtBxswgj+ZSs8YD1tpxLl2BG+odB/WC1xtTFSljKkKn6b/3/lyrpkbhYfY iI7MsiyjuIpE6iQK2YSiV4ti4/mdgdt4pcbpT92iENZDhhyZM8xcMvWGZV2RWx/g1et6 pHcQ== X-Gm-Message-State: ABy/qLbfHwRLAhwVzOqPhS0cthTiq3oErUpCWradrBixQuN37zedJbhn /td0l6sGUmt48DHr2JCibAV3Qg== X-Google-Smtp-Source: APBJJlHWG/nG8cYGh+bA6ihiUuY1h+OmDGzY+AfGFIW0cwXlJC7qa3aS8ftT4KQ6i8EuYK6gaQtAEg== X-Received: by 2002:a05:6a20:918e:b0:11a:dbb3:703b with SMTP id v14-20020a056a20918e00b0011adbb3703bmr5557054pzd.6.1690445649366; Thu, 27 Jul 2023 01:14:09 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.13.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:14:08 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v3 41/49] zsmalloc: dynamically allocate the mm-zspool shrinker Date: Thu, 27 Jul 2023 16:04:54 +0800 Message-Id: <20230727080502.77895-42-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the mm-zspool shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct zs_pool. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- mm/zsmalloc.c | 28 ++++++++++++++++------------ 1 file changed, 16 insertions(+), 12 deletions(-) diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index b96230402a8d..e63302e07c97 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -229,7 +229,7 @@ struct zs_pool { struct zs_pool_stats stats; /* Compact classes */ - struct shrinker shrinker; + struct shrinker *shrinker; #ifdef CONFIG_ZSMALLOC_STAT struct dentry *stat_dentry; @@ -2086,8 +2086,7 @@ static unsigned long zs_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc) { unsigned long pages_freed; - struct zs_pool *pool = container_of(shrinker, struct zs_pool, - shrinker); + struct zs_pool *pool = shrinker->private_data; /* * Compact classes and calculate compaction delta. @@ -2105,8 +2104,7 @@ static unsigned long zs_shrinker_count(struct shrinker *shrinker, int i; struct size_class *class; unsigned long pages_to_free = 0; - struct zs_pool *pool = container_of(shrinker, struct zs_pool, - shrinker); + struct zs_pool *pool = shrinker->private_data; for (i = ZS_SIZE_CLASSES - 1; i >= 0; i--) { class = pool->size_class[i]; @@ -2121,18 +2119,24 @@ static unsigned long zs_shrinker_count(struct shrinker *shrinker, static void zs_unregister_shrinker(struct zs_pool *pool) { - unregister_shrinker(&pool->shrinker); + shrinker_free(pool->shrinker); } static int zs_register_shrinker(struct zs_pool *pool) { - pool->shrinker.scan_objects = zs_shrinker_scan; - pool->shrinker.count_objects = zs_shrinker_count; - pool->shrinker.batch = 0; - pool->shrinker.seeks = DEFAULT_SEEKS; + pool->shrinker = shrinker_alloc(0, "mm-zspool:%s", pool->name); + if (!pool->shrinker) + return -ENOMEM; + + pool->shrinker->scan_objects = zs_shrinker_scan; + pool->shrinker->count_objects = zs_shrinker_count; + pool->shrinker->batch = 0; + pool->shrinker->seeks = DEFAULT_SEEKS; + pool->shrinker->private_data = pool; - return register_shrinker(&pool->shrinker, "mm-zspool:%s", - pool->name); + shrinker_register(pool->shrinker); + + return 0; } static int calculate_zspage_chain_size(int class_size) From patchwork Thu Jul 27 08:04:55 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329447 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3DA5CD50F for ; Thu, 27 Jul 2023 08:15:20 +0000 (UTC) Received: from mail-pf1-x42a.google.com (mail-pf1-x42a.google.com [IPv6:2607:f8b0:4864:20::42a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AD7438A47 for ; Thu, 27 Jul 2023 01:14:59 -0700 (PDT) Received: by mail-pf1-x42a.google.com with SMTP id d2e1a72fcca58-686f74a8992so78548b3a.1 for ; Thu, 27 Jul 2023 01:14:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445661; x=1691050461; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=Z8shjZqP4Y8hZDaFLi0y7A+vG6rpfakjLEwLFWECHfw=; b=M90va2ss9YMh+De8/KZ+mVAcBrFGEU+GzcGNqxT+B7hxTFEFMd5WuiRk55c0waVg/i KUSKiUTPKXnQRLgL7+hNGJB6n7fW48sv8jtOOA7F/yud6N73bo3romR87IwxTWFghhtj +YqkOMHpv3kLBbjEgh8NplH0r6imKflx3JaCipHnW/k8FR0eXG63PDYGiheNwgxfAvYO s4RNvSYPNCMRAhjFOV4c7zk3yoOMMnjDLt+tw6HnbliXEGOVORcHeWA+2V79c3P+B/9H uhy/DS05CaNG4GhbfQJuetBgKgR0N62DJbP4l44spA0q6/uulU3xcf96dcv+7F9txF9C bWPA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445661; x=1691050461; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=Z8shjZqP4Y8hZDaFLi0y7A+vG6rpfakjLEwLFWECHfw=; b=g8JS/uXlQeshpmC5mWF8kqF3+cpFvxbWGkooNekQKUQbQaYh5sPe7JRhZ9iqn6O26L 9P/6c/fECrCYw0q/KAzqVr/nOqZ1ALDtaFZ/8KD5bwCP5P6ra1UqeeSTCq4yxpOqgj5h qRWuRGpUYSab77kMlQcl3NyCFDUMn8MILG2rlWYWjlSjgirZSHlWSYzRG8p63O48CNZE 1EfTZfmr6Opj0ENt4BMb3PPaS/3i2Em7z2BmF75uyGZhJygZGc19ri77uIY/1lcIZ/xu 7en7sDRbeCxHBREsSkuyF5LtPmaRKUZZ/z88nz+NuTa+l6uyvD5xzqCqjwKvaBNrOuy9 vTtw== X-Gm-Message-State: ABy/qLaF1XBTKeobg5tz+Lj9jFjUbc6BNojFqk7/L3LCv/ZxtlywEfpH DiBfScxLx8FO0dKNwcWy3hBePw== X-Google-Smtp-Source: APBJJlFLUJzqiKbCmr51AmVixakC62oPoMujZW4POdUPOnyVlrtViOXc2TPW8l2+gcY0Xyv3B9lWUA== X-Received: by 2002:a05:6a20:4304:b0:111:a0e5:d2b7 with SMTP id h4-20020a056a20430400b00111a0e5d2b7mr5727834pzk.4.1690445661472; Thu, 27 Jul 2023 01:14:21 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.14.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:14:21 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v3 42/49] fs: super: dynamically allocate the s_shrink Date: Thu, 27 Jul 2023 16:04:55 +0800 Message-Id: <20230727080502.77895-43-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the s_shrink, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct super_block. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/btrfs/super.c | 2 +- fs/kernfs/mount.c | 2 +- fs/proc/root.c | 2 +- fs/super.c | 36 ++++++++++++++++++++---------------- include/linux/fs.h | 2 +- 5 files changed, 24 insertions(+), 20 deletions(-) diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index cffdd6f7f8e8..4c9c878b0da4 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -1519,7 +1519,7 @@ static struct dentry *btrfs_mount_root(struct file_system_type *fs_type, error = -EBUSY; } else { snprintf(s->s_id, sizeof(s->s_id), "%pg", bdev); - shrinker_debugfs_rename(&s->s_shrink, "sb-%s:%s", fs_type->name, + shrinker_debugfs_rename(s->s_shrink, "sb-%s:%s", fs_type->name, s->s_id); btrfs_sb(s)->bdev_holder = fs_type; error = btrfs_fill_super(s, fs_devices, data); diff --git a/fs/kernfs/mount.c b/fs/kernfs/mount.c index d49606accb07..2657ff1181f1 100644 --- a/fs/kernfs/mount.c +++ b/fs/kernfs/mount.c @@ -256,7 +256,7 @@ static int kernfs_fill_super(struct super_block *sb, struct kernfs_fs_context *k sb->s_time_gran = 1; /* sysfs dentries and inodes don't require IO to create */ - sb->s_shrink.seeks = 0; + sb->s_shrink->seeks = 0; /* get root inode, initialize and unlock it */ down_read(&kf_root->kernfs_rwsem); diff --git a/fs/proc/root.c b/fs/proc/root.c index a86e65a608da..22b78b28b477 100644 --- a/fs/proc/root.c +++ b/fs/proc/root.c @@ -188,7 +188,7 @@ static int proc_fill_super(struct super_block *s, struct fs_context *fc) s->s_stack_depth = FILESYSTEM_MAX_STACK_DEPTH; /* procfs dentries and inodes don't require IO to create */ - s->s_shrink.seeks = 0; + s->s_shrink->seeks = 0; pde_get(&proc_root); root_inode = proc_get_inode(s, &proc_root); diff --git a/fs/super.c b/fs/super.c index da68584815e4..68b3877af941 100644 --- a/fs/super.c +++ b/fs/super.c @@ -67,7 +67,7 @@ static unsigned long super_cache_scan(struct shrinker *shrink, long dentries; long inodes; - sb = container_of(shrink, struct super_block, s_shrink); + sb = shrink->private_data; /* * Deadlock avoidance. We may hold various FS locks, and we don't want @@ -120,7 +120,7 @@ static unsigned long super_cache_count(struct shrinker *shrink, struct super_block *sb; long total_objects = 0; - sb = container_of(shrink, struct super_block, s_shrink); + sb = shrink->private_data; /* * We don't call trylock_super() here as it is a scalability bottleneck, @@ -182,7 +182,7 @@ static void destroy_unused_super(struct super_block *s) security_sb_free(s); put_user_ns(s->s_user_ns); kfree(s->s_subtype); - free_prealloced_shrinker(&s->s_shrink); + shrinker_free(s->s_shrink); /* no delays needed */ destroy_super_work(&s->destroy_work); } @@ -259,16 +259,20 @@ static struct super_block *alloc_super(struct file_system_type *type, int flags, s->s_time_min = TIME64_MIN; s->s_time_max = TIME64_MAX; - s->s_shrink.seeks = DEFAULT_SEEKS; - s->s_shrink.scan_objects = super_cache_scan; - s->s_shrink.count_objects = super_cache_count; - s->s_shrink.batch = 1024; - s->s_shrink.flags = SHRINKER_NUMA_AWARE | SHRINKER_MEMCG_AWARE; - if (prealloc_shrinker(&s->s_shrink, "sb-%s", type->name)) + s->s_shrink = shrinker_alloc(SHRINKER_NUMA_AWARE | SHRINKER_MEMCG_AWARE, + "sb-%s", type->name); + if (!s->s_shrink) goto fail; - if (list_lru_init_memcg(&s->s_dentry_lru, &s->s_shrink)) + + s->s_shrink->seeks = DEFAULT_SEEKS; + s->s_shrink->scan_objects = super_cache_scan; + s->s_shrink->count_objects = super_cache_count; + s->s_shrink->batch = 1024; + s->s_shrink->private_data = s; + + if (list_lru_init_memcg(&s->s_dentry_lru, s->s_shrink)) goto fail; - if (list_lru_init_memcg(&s->s_inode_lru, &s->s_shrink)) + if (list_lru_init_memcg(&s->s_inode_lru, s->s_shrink)) goto fail; return s; @@ -326,7 +330,7 @@ void deactivate_locked_super(struct super_block *s) { struct file_system_type *fs = s->s_type; if (atomic_dec_and_test(&s->s_active)) { - unregister_shrinker(&s->s_shrink); + shrinker_free(s->s_shrink); fs->kill_sb(s); /* @@ -599,7 +603,7 @@ struct super_block *sget_fc(struct fs_context *fc, hlist_add_head(&s->s_instances, &s->s_type->fs_supers); spin_unlock(&sb_lock); get_filesystem(s->s_type); - register_shrinker_prepared(&s->s_shrink); + shrinker_register(s->s_shrink); return s; share_extant_sb: @@ -678,7 +682,7 @@ struct super_block *sget(struct file_system_type *type, hlist_add_head(&s->s_instances, &type->fs_supers); spin_unlock(&sb_lock); get_filesystem(type); - register_shrinker_prepared(&s->s_shrink); + shrinker_register(s->s_shrink); return s; } EXPORT_SYMBOL(sget); @@ -1312,7 +1316,7 @@ int get_tree_bdev(struct fs_context *fc, down_write(&s->s_umount); } else { snprintf(s->s_id, sizeof(s->s_id), "%pg", bdev); - shrinker_debugfs_rename(&s->s_shrink, "sb-%s:%s", + shrinker_debugfs_rename(s->s_shrink, "sb-%s:%s", fc->fs_type->name, s->s_id); sb_set_blocksize(s, block_size(bdev)); error = fill_super(s, fc); @@ -1385,7 +1389,7 @@ struct dentry *mount_bdev(struct file_system_type *fs_type, down_write(&s->s_umount); } else { snprintf(s->s_id, sizeof(s->s_id), "%pg", bdev); - shrinker_debugfs_rename(&s->s_shrink, "sb-%s:%s", + shrinker_debugfs_rename(s->s_shrink, "sb-%s:%s", fs_type->name, s->s_id); sb_set_blocksize(s, block_size(bdev)); error = fill_super(s, data, flags & SB_SILENT ? 1 : 0); diff --git a/include/linux/fs.h b/include/linux/fs.h index 891cf662b26f..500238213fd9 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1232,7 +1232,7 @@ struct super_block { const struct dentry_operations *s_d_op; /* default d_op for dentries */ - struct shrinker s_shrink; /* per-sb shrinker handle */ + struct shrinker *s_shrink; /* per-sb shrinker handle */ /* Number of inodes with nlink == 0 but still referenced */ atomic_long_t s_remove_count; From patchwork Thu Jul 27 08:04:56 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329547 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6C6E1DDD9 for ; Thu, 27 Jul 2023 08:19:47 +0000 (UTC) Received: from mail-pf1-f172.google.com (mail-pf1-f172.google.com [209.85.210.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 757CB7294 for ; Thu, 27 Jul 2023 01:19:34 -0700 (PDT) Received: by mail-pf1-f172.google.com with SMTP id d2e1a72fcca58-686f6231bdeso114010b3a.1 for ; Thu, 27 Jul 2023 01:19:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445674; x=1691050474; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=G6s8y0Dka4KE4srOwy3I0FSAaIGrcYmvE6JrVZfCpDs=; b=MBKqtR+m6tRDLwGbmGnhkuL4q0cqlWsjDeU7ZVRwaOZMOF0riGkcJrkyInKFI0pYis mWaNeHtwDzmym2/d2f7OIfkckgap6Prz7ne5Q+65Q9kFa2z8w6TXtQPQCrjIFsYVVR2m PRIs97KnddHeo2KzvpuxuJU//NWKLj0FPiuARmlExd2GlY1ot6WyHoUBUu1qPjJUPpT3 ZsG43k1Oz59Ii0r86zAALutb1Gd6A6cdhWxvrkZ21MO6UtDcxtLUaksPoYyR3li5MX3H RGe7M6IrmRvaAAMZm9ToAYQ8mPB0OkHGFsJVWBGXFBUa+qGlQpcM3sB1mv4YN0cfvLiI gBbg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445674; x=1691050474; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=G6s8y0Dka4KE4srOwy3I0FSAaIGrcYmvE6JrVZfCpDs=; b=c8FBb+X8/1gdMkrTNhGMIkW+lm5/lm1JBj0NpmPbY3U5xZjErBNsqR0sec5T8o/L7T KKYXKT10TOZhWtSJnpXVqLygXfRCV1+SsFLWCFDcYXTESc6ZbHQwoDTA00/LW12wyolu chVXcXxyPHPwBzsLoE8btKcsAGmIxOietwoF4H1oEyGI+x5t/1SCeXVkcd7ECUgJayZY n/+bx4EIf4F2egOwiKUck4TCAaSidnoIoEXtLvPeFAjRi52jdYV3igv8FWqHKYNH6hik X2U89Wc4c2pZrtyOdmEMpQ7OjxKbTZiM8/OvuLjTaIePHmPuBS55n2FDZxesHNqHwS67 J79A== X-Gm-Message-State: ABy/qLa+J4APUEVGgvDfods3R12UHmNKsDlx7atsYHv/UihIQjUzMV3O Wlw3aUWK2Ka5rqTEy5nd/6DFRg== X-Google-Smtp-Source: APBJJlHZc+tyEor0irWiukNNv0+VJsTfo/jEPBj29UYMUTILxfRG5SoeWB7BzCnWVmRXaEQSTc0xVA== X-Received: by 2002:a05:6a00:4a0e:b0:677:3439:874a with SMTP id do14-20020a056a004a0e00b006773439874amr5210105pfb.3.1690445673911; Thu, 27 Jul 2023 01:14:33 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.14.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:14:33 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v3 43/49] mm: shrinker: remove old APIs Date: Thu, 27 Jul 2023 16:04:56 +0800 Message-Id: <20230727080502.77895-44-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Now no users are using the old APIs, just remove them. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- include/linux/shrinker.h | 7 -- mm/shrinker.c | 143 --------------------------------------- 2 files changed, 150 deletions(-) diff --git a/include/linux/shrinker.h b/include/linux/shrinker.h index cc23ff0aee20..c55c07c3f0cb 100644 --- a/include/linux/shrinker.h +++ b/include/linux/shrinker.h @@ -103,13 +103,6 @@ struct shrinker *shrinker_alloc(unsigned int flags, const char *fmt, ...); void shrinker_register(struct shrinker *shrinker); void shrinker_free(struct shrinker *shrinker); -extern int __printf(2, 3) prealloc_shrinker(struct shrinker *shrinker, - const char *fmt, ...); -extern void register_shrinker_prepared(struct shrinker *shrinker); -extern int __printf(2, 3) register_shrinker(struct shrinker *shrinker, - const char *fmt, ...); -extern void unregister_shrinker(struct shrinker *shrinker); -extern void free_prealloced_shrinker(struct shrinker *shrinker); extern void synchronize_shrinkers(void); #ifdef CONFIG_SHRINKER_DEBUG diff --git a/mm/shrinker.c b/mm/shrinker.c index 43a375f954f3..3ab301ff122d 100644 --- a/mm/shrinker.c +++ b/mm/shrinker.c @@ -651,149 +651,6 @@ void shrinker_free(struct shrinker *shrinker) } EXPORT_SYMBOL_GPL(shrinker_free); -/* - * Add a shrinker callback to be called from the vm. - */ -static int __prealloc_shrinker(struct shrinker *shrinker) -{ - unsigned int size; - int err; - - if (shrinker->flags & SHRINKER_MEMCG_AWARE) { - err = prealloc_memcg_shrinker(shrinker); - if (err != -ENOSYS) - return err; - - shrinker->flags &= ~SHRINKER_MEMCG_AWARE; - } - - size = sizeof(*shrinker->nr_deferred); - if (shrinker->flags & SHRINKER_NUMA_AWARE) - size *= nr_node_ids; - - shrinker->nr_deferred = kzalloc(size, GFP_KERNEL); - if (!shrinker->nr_deferred) - return -ENOMEM; - - return 0; -} - -#ifdef CONFIG_SHRINKER_DEBUG -int prealloc_shrinker(struct shrinker *shrinker, const char *fmt, ...) -{ - va_list ap; - int err; - - va_start(ap, fmt); - shrinker->name = kvasprintf_const(GFP_KERNEL, fmt, ap); - va_end(ap); - if (!shrinker->name) - return -ENOMEM; - - err = __prealloc_shrinker(shrinker); - if (err) { - kfree_const(shrinker->name); - shrinker->name = NULL; - } - - return err; -} -#else -int prealloc_shrinker(struct shrinker *shrinker, const char *fmt, ...) -{ - return __prealloc_shrinker(shrinker); -} -#endif - -void free_prealloced_shrinker(struct shrinker *shrinker) -{ -#ifdef CONFIG_SHRINKER_DEBUG - kfree_const(shrinker->name); - shrinker->name = NULL; -#endif - if (shrinker->flags & SHRINKER_MEMCG_AWARE) { - down_write(&shrinker_rwsem); - unregister_memcg_shrinker(shrinker); - up_write(&shrinker_rwsem); - return; - } - - kfree(shrinker->nr_deferred); - shrinker->nr_deferred = NULL; -} - -void register_shrinker_prepared(struct shrinker *shrinker) -{ - down_write(&shrinker_rwsem); - list_add_tail(&shrinker->list, &shrinker_list); - shrinker->flags |= SHRINKER_REGISTERED; - shrinker_debugfs_add(shrinker); - up_write(&shrinker_rwsem); -} - -static int __register_shrinker(struct shrinker *shrinker) -{ - int err = __prealloc_shrinker(shrinker); - - if (err) - return err; - register_shrinker_prepared(shrinker); - return 0; -} - -#ifdef CONFIG_SHRINKER_DEBUG -int register_shrinker(struct shrinker *shrinker, const char *fmt, ...) -{ - va_list ap; - int err; - - va_start(ap, fmt); - shrinker->name = kvasprintf_const(GFP_KERNEL, fmt, ap); - va_end(ap); - if (!shrinker->name) - return -ENOMEM; - - err = __register_shrinker(shrinker); - if (err) { - kfree_const(shrinker->name); - shrinker->name = NULL; - } - return err; -} -#else -int register_shrinker(struct shrinker *shrinker, const char *fmt, ...) -{ - return __register_shrinker(shrinker); -} -#endif -EXPORT_SYMBOL(register_shrinker); - -/* - * Remove one - */ -void unregister_shrinker(struct shrinker *shrinker) -{ - struct dentry *debugfs_entry; - int debugfs_id; - - if (!(shrinker->flags & SHRINKER_REGISTERED)) - return; - - down_write(&shrinker_rwsem); - list_del(&shrinker->list); - shrinker->flags &= ~SHRINKER_REGISTERED; - if (shrinker->flags & SHRINKER_MEMCG_AWARE) - unregister_memcg_shrinker(shrinker); - debugfs_entry = shrinker_debugfs_detach(shrinker, &debugfs_id); - up_write(&shrinker_rwsem); - - shrinker_debugfs_remove(debugfs_entry, debugfs_id); - - kfree(shrinker->nr_deferred); - shrinker->nr_deferred = NULL; -} -EXPORT_SYMBOL(unregister_shrinker); - /** * synchronize_shrinkers - Wait for all running shrinkers to complete. * From patchwork Thu Jul 27 08:04:57 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329548 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C294EC8EC for ; Thu, 27 Jul 2023 08:19:58 +0000 (UTC) Received: from mail-pf1-f179.google.com (mail-pf1-f179.google.com [209.85.210.179]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EE4C06EB4 for ; Thu, 27 Jul 2023 01:19:47 -0700 (PDT) Received: by mail-pf1-f179.google.com with SMTP id d2e1a72fcca58-686f6231bdeso114059b3a.1 for ; Thu, 27 Jul 2023 01:19:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445686; x=1691050486; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=dp1PQp+5gTkm4DG/kxrQVAZ0rB7KyI/rGW6TiEnUaUw=; b=MqP96Bm9fq0jb+xCLhNx3qXYFKB4F/mSOAZlWu4Jm1FlamJjkRz7LK2fKulsbN+LSn l0VYmbaw65P+tcDvLp0k7E9haUqgvwJAWE6OpcHuKyrg08ULwJDb+WP/772xDJT911c7 7zPxywkNsS4PFeXucHGoe87Ta2cj9HmvnL8UOM3A93e62EY5SL9atdoN3JsX9JTRnBw0 N6tNSQutP8zPFknN6y/kLRagvKGA92ju9GvGVVfPXxOrB71gJD9FTKmQ9dcanmCJl0Mj XtJnZ+1w8I86OoTRE6esFmZWRayBNnTg+LYaUjuJMZuWhMZx1Zg8pNqMQLhwRUKqGlU2 KUKQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445686; x=1691050486; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=dp1PQp+5gTkm4DG/kxrQVAZ0rB7KyI/rGW6TiEnUaUw=; b=ZGkvtIBUHq+ecExppVu4jDvzKa0jE1u2ilKYAf1D2x7VaPMPBqnTzWVIesPHjH9A6J BYJUKwNm/oVwGDiByApSeM3C/pzh6ULE1l7rCxxgnf+8SO9nyq3FDnOE7plXbRbXerZl GvELoVHT1LNYbV42KF/M1+XG/YlsioHk0hNZipIb4cEULMIrdSGPrTN7H38+UOR4+jam Au9xpbsi5vgdR06Pd1E5ZXJ6kIwCDsGATULIZlcT80ElNrYRVMfhV0DIqRmG8ZZ6lS+1 5o2K/VGMVOMvz7lUtdT6/BWwNH2C5YkIhKFMU8abj1LpHGAZwDQ9LPiSkPP5+8NtoH6t F2PQ== X-Gm-Message-State: ABy/qLYNP/nD7bgDXD4+vns+Jc5OtJmiIPGls09/+cpfZq0KoAKyk0Kd M49JnUn+sWKXVzwioQO7QYa1aA== X-Google-Smtp-Source: APBJJlEKqhcD6VVO3jjfSZcBy2+bKwiVuLncssOJVtvwGRfgIG5yeQydG6zmLtiTondHAX8WGQ4FoA== X-Received: by 2002:a05:6a20:841d:b0:133:7a67:b477 with SMTP id c29-20020a056a20841d00b001337a67b477mr6364506pzd.1.1690445686337; Thu, 27 Jul 2023 01:14:46 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.14.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:14:45 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v3 44/49] drm/ttm: introduce pool_shrink_rwsem Date: Thu, 27 Jul 2023 16:04:57 +0800 Message-Id: <20230727080502.77895-45-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_NONE, T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Currently, the synchronize_shrinkers() is only used by TTM pool. It only requires that no shrinkers run in parallel. After we use RCU+refcount method to implement the lockless slab shrink, we can not use shrinker_rwsem or synchronize_rcu() to guarantee that all shrinker invocations have seen an update before freeing memory. So we introduce a new pool_shrink_rwsem to implement a private synchronize_shrinkers(), so as to achieve the same purpose. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- drivers/gpu/drm/ttm/ttm_pool.c | 15 +++++++++++++++ include/linux/shrinker.h | 2 -- mm/shrinker.c | 15 --------------- 3 files changed, 15 insertions(+), 17 deletions(-) diff --git a/drivers/gpu/drm/ttm/ttm_pool.c b/drivers/gpu/drm/ttm/ttm_pool.c index c9c9618c0dce..38b4c280725c 100644 --- a/drivers/gpu/drm/ttm/ttm_pool.c +++ b/drivers/gpu/drm/ttm/ttm_pool.c @@ -74,6 +74,7 @@ static struct ttm_pool_type global_dma32_uncached[MAX_ORDER + 1]; static spinlock_t shrinker_lock; static struct list_head shrinker_list; static struct shrinker *mm_shrinker; +static DECLARE_RWSEM(pool_shrink_rwsem); /* Allocate pages of size 1 << order with the given gfp_flags */ static struct page *ttm_pool_alloc_page(struct ttm_pool *pool, gfp_t gfp_flags, @@ -317,6 +318,7 @@ static unsigned int ttm_pool_shrink(void) unsigned int num_pages; struct page *p; + down_read(&pool_shrink_rwsem); spin_lock(&shrinker_lock); pt = list_first_entry(&shrinker_list, typeof(*pt), shrinker_list); list_move_tail(&pt->shrinker_list, &shrinker_list); @@ -329,6 +331,7 @@ static unsigned int ttm_pool_shrink(void) } else { num_pages = 0; } + up_read(&pool_shrink_rwsem); return num_pages; } @@ -572,6 +575,18 @@ void ttm_pool_init(struct ttm_pool *pool, struct device *dev, } EXPORT_SYMBOL(ttm_pool_init); +/** + * synchronize_shrinkers - Wait for all running shrinkers to complete. + * + * This is useful to guarantee that all shrinker invocations have seen an + * update, before freeing memory, similar to rcu. + */ +static void synchronize_shrinkers(void) +{ + down_write(&pool_shrink_rwsem); + up_write(&pool_shrink_rwsem); +} + /** * ttm_pool_fini - Cleanup a pool * diff --git a/include/linux/shrinker.h b/include/linux/shrinker.h index c55c07c3f0cb..025c8070dd86 100644 --- a/include/linux/shrinker.h +++ b/include/linux/shrinker.h @@ -103,8 +103,6 @@ struct shrinker *shrinker_alloc(unsigned int flags, const char *fmt, ...); void shrinker_register(struct shrinker *shrinker); void shrinker_free(struct shrinker *shrinker); -extern void synchronize_shrinkers(void); - #ifdef CONFIG_SHRINKER_DEBUG extern int __printf(2, 3) shrinker_debugfs_rename(struct shrinker *shrinker, const char *fmt, ...); diff --git a/mm/shrinker.c b/mm/shrinker.c index 3ab301ff122d..a27779ed3798 100644 --- a/mm/shrinker.c +++ b/mm/shrinker.c @@ -650,18 +650,3 @@ void shrinker_free(struct shrinker *shrinker) kfree(shrinker); } EXPORT_SYMBOL_GPL(shrinker_free); - -/** - * synchronize_shrinkers - Wait for all running shrinkers to complete. - * - * This is equivalent to calling unregister_shrink() and register_shrinker(), - * but atomically and with less overhead. This is useful to guarantee that all - * shrinker invocations have seen an update, before freeing memory, similar to - * rcu. - */ -void synchronize_shrinkers(void) -{ - down_write(&shrinker_rwsem); - up_write(&shrinker_rwsem); -} -EXPORT_SYMBOL(synchronize_shrinkers); From patchwork Thu Jul 27 08:04:58 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329634 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B75FBD50E for ; Thu, 27 Jul 2023 08:25:02 +0000 (UTC) Received: from mail-qt1-x82a.google.com (mail-qt1-x82a.google.com [IPv6:2607:f8b0:4864:20::82a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 135B1C9A6 for ; Thu, 27 Jul 2023 01:24:39 -0700 (PDT) Received: by mail-qt1-x82a.google.com with SMTP id d75a77b69052e-406b403dd06so949621cf.0 for ; Thu, 27 Jul 2023 01:24:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690446258; x=1691051058; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=hyLc13iHrkV+klh05yD71xFAgQY4jD2CPzn+LZNOh3k=; b=YvfhaY3QpvHCtgmTgSC+aJw/0Yj4vE/p3duVpZzWj3i0oVzaxXC4hGuPHMQVHTZ16j wyD1Bu8CKGdgPtuKKcLK4Vl1t0+2zWogaxizpqk0fQmr2/DO+u317aWc8WYiAQcx652F 5Tu+wOplnXILe8WlUMjKsC+Vdj6MEtyek1a6F9S+DWdRP2tp3+Gq8Gp/sPAa79bJebw0 aXW4gV2E93SdouJuy1eEe+34yAyepOZCmMCVe+SaOjIm8+x9fFlpkSe6Oo8ErVZ6WBwm gQl7r1FIDTnL/Yszl/Fmg0JppsGJlErzQ0oQFCvvrcyAu6JWlp3DEwHiauZaWZdjWtuR 9a/w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690446258; x=1691051058; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=hyLc13iHrkV+klh05yD71xFAgQY4jD2CPzn+LZNOh3k=; b=FQYbxJVW5TshmVPIP8wbhKZn9tYoQ53nMbOEJ4j7X532z/4q32K7S21RPpDd1h4UXi OoXW2ShNBX+6wcKhTe8FShc1b0fTN8GTvNIRuXlwTW+voeES/KMDQudpxuLYiwnNc5PV toTFjcH/SgflQLV2/hUO/IowwyC3PcjHEyKhFvhpUubZFfZ8liNAg03X8S9+QfEhJGOK pVTBQqY7W+SzMMRfjS4dAyRHeMtKC3ikGaIm9uyC0HakOFeI6ulETcFLpxh6tXb4TdRH lptR9G/9VplkIdjUCFI9vx8+0EXroIRsq4J9kwYjfytSia4sTSLCI3s8s+arb5KTUXrJ vlbQ== X-Gm-Message-State: ABy/qLbDIk4L6uQOnzpHgEbWNnibHtw3QGH4WlHum+hxJnFa+1reLKx/ BL8BkPJhQTLXmea5NlryJbs4+DTn5rubaUPjGho= X-Google-Smtp-Source: APBJJlHHYMtR97FgZwPKg/I4FvBtMIi/WenRh8r+QxTKT4uZnBzRavnMRN782PTiMjlEUg18pWA/Fw== X-Received: by 2002:a05:6a20:8f23:b0:137:8ddf:4647 with SMTP id b35-20020a056a208f2300b001378ddf4647mr5934103pzk.2.1690445698478; Thu, 27 Jul 2023 01:14:58 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.14.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:14:58 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v3 45/49] mm: shrinker: add a secondary array for shrinker_info::{map, nr_deferred} Date: Thu, 27 Jul 2023 16:04:58 +0800 Message-Id: <20230727080502.77895-46-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Currently, we maintain two linear arrays per node per memcg, which are shrinker_info::map and shrinker_info::nr_deferred. And we need to resize them when the shrinker_nr_max is exceeded, that is, allocate a new array, and then copy the old array to the new array, and finally free the old array by RCU. For shrinker_info::map, we do set_bit() under the RCU lock, so we may set the value into the old map which is about to be freed. This may cause the value set to be lost. The current solution is not to copy the old map when resizing, but to set all the corresponding bits in the new map to 1. This solves the data loss problem, but bring the overhead of more pointless loops while doing memcg slab shrink. For shrinker_info::nr_deferred, we will only modify it under the read lock of shrinker_rwsem, so it will not run concurrently with the resizing. But after we make memcg slab shrink lockless, there will be the same data loss problem as shrinker_info::map, and we can't work around it like the map. For such resizable arrays, the most straightforward idea is to change it to xarray, like we did for list_lru [1]. We need to do xa_store() in the list_lru_add()-->set_shrinker_bit(), but this will cause memory allocation, and the list_lru_add() doesn't accept failure. A possible solution is to pre-allocate, but the location of pre-allocation is not well determined. Therefore, this commit chooses to introduce a secondary array for shrinker_info::{map, nr_deferred}, so that we only need to copy this secondary array every time the size is resized. Then even if we get the old secondary array under the RCU lock, the found map and nr_deferred are also true, so no data is lost. [1]. https://lore.kernel.org/all/20220228122126.37293-13-songmuchun@bytedance.com/ Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- include/linux/memcontrol.h | 12 +- include/linux/shrinker.h | 17 +++ mm/shrinker.c | 250 +++++++++++++++++++++++-------------- 3 files changed, 172 insertions(+), 107 deletions(-) diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index e765d1ff9cbb..2c9327d27c3b 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -21,6 +21,7 @@ #include #include #include +#include struct mem_cgroup; struct obj_cgroup; @@ -88,17 +89,6 @@ struct mem_cgroup_reclaim_iter { unsigned int generation; }; -/* - * Bitmap and deferred work of shrinker::id corresponding to memcg-aware - * shrinkers, which have elements charged to this memcg. - */ -struct shrinker_info { - struct rcu_head rcu; - atomic_long_t *nr_deferred; - unsigned long *map; - int map_nr_max; -}; - struct lruvec_stats_percpu { /* Local (CPU and cgroup) state */ long state[NR_VM_NODE_STAT_ITEMS]; diff --git a/include/linux/shrinker.h b/include/linux/shrinker.h index 025c8070dd86..eb342994675a 100644 --- a/include/linux/shrinker.h +++ b/include/linux/shrinker.h @@ -5,6 +5,23 @@ #include #include +#define SHRINKER_UNIT_BITS BITS_PER_LONG + +/* + * Bitmap and deferred work of shrinker::id corresponding to memcg-aware + * shrinkers, which have elements charged to the memcg. + */ +struct shrinker_info_unit { + atomic_long_t nr_deferred[SHRINKER_UNIT_BITS]; + DECLARE_BITMAP(map, SHRINKER_UNIT_BITS); +}; + +struct shrinker_info { + struct rcu_head rcu; + int map_nr_max; + struct shrinker_info_unit *unit[]; +}; + /* * This struct is used to pass information from page reclaim to the shrinkers. * We consolidate the values for easier extension later. diff --git a/mm/shrinker.c b/mm/shrinker.c index a27779ed3798..1911c06b8af5 100644 --- a/mm/shrinker.c +++ b/mm/shrinker.c @@ -12,15 +12,50 @@ DECLARE_RWSEM(shrinker_rwsem); #ifdef CONFIG_MEMCG static int shrinker_nr_max; -/* The shrinker_info is expanded in a batch of BITS_PER_LONG */ -static inline int shrinker_map_size(int nr_items) +static inline int shrinker_unit_size(int nr_items) { - return (DIV_ROUND_UP(nr_items, BITS_PER_LONG) * sizeof(unsigned long)); + return (DIV_ROUND_UP(nr_items, SHRINKER_UNIT_BITS) * sizeof(struct shrinker_info_unit *)); } -static inline int shrinker_defer_size(int nr_items) +static inline void shrinker_unit_free(struct shrinker_info *info, int start) { - return (round_up(nr_items, BITS_PER_LONG) * sizeof(atomic_long_t)); + struct shrinker_info_unit **unit; + int nr, i; + + if (!info) + return; + + unit = info->unit; + nr = DIV_ROUND_UP(info->map_nr_max, SHRINKER_UNIT_BITS); + + for (i = start; i < nr; i++) { + if (!unit[i]) + break; + + kvfree(unit[i]); + unit[i] = NULL; + } +} + +static inline int shrinker_unit_alloc(struct shrinker_info *new, + struct shrinker_info *old, int nid) +{ + struct shrinker_info_unit *unit; + int nr = DIV_ROUND_UP(new->map_nr_max, SHRINKER_UNIT_BITS); + int start = old ? DIV_ROUND_UP(old->map_nr_max, SHRINKER_UNIT_BITS) : 0; + int i; + + for (i = start; i < nr; i++) { + unit = kvzalloc_node(sizeof(*unit), GFP_KERNEL, nid); + if (!unit) { + shrinker_unit_free(new, start); + return -ENOMEM; + } + + new->unit[i] = unit; + } + + return 0; } void free_shrinker_info(struct mem_cgroup *memcg) @@ -32,6 +67,7 @@ void free_shrinker_info(struct mem_cgroup *memcg) for_each_node(nid) { pn = memcg->nodeinfo[nid]; info = rcu_dereference_protected(pn->shrinker_info, true); + shrinker_unit_free(info, 0); kvfree(info); rcu_assign_pointer(pn->shrinker_info, NULL); } @@ -40,28 +76,27 @@ void free_shrinker_info(struct mem_cgroup *memcg) int alloc_shrinker_info(struct mem_cgroup *memcg) { struct shrinker_info *info; - int nid, size, ret = 0; - int map_size, defer_size = 0; + int nid, ret = 0; + int array_size = 0; down_write(&shrinker_rwsem); - map_size = shrinker_map_size(shrinker_nr_max); - defer_size = shrinker_defer_size(shrinker_nr_max); - size = map_size + defer_size; + array_size = shrinker_unit_size(shrinker_nr_max); for_each_node(nid) { - info = kvzalloc_node(sizeof(*info) + size, GFP_KERNEL, nid); - if (!info) { - free_shrinker_info(memcg); - ret = -ENOMEM; - break; - } - info->nr_deferred = (atomic_long_t *)(info + 1); - info->map = (void *)info->nr_deferred + defer_size; + info = kvzalloc_node(sizeof(*info) + array_size, GFP_KERNEL, nid); + if (!info) + goto err; info->map_nr_max = shrinker_nr_max; + if (shrinker_unit_alloc(info, NULL, nid)) + goto err; rcu_assign_pointer(memcg->nodeinfo[nid]->shrinker_info, info); } up_write(&shrinker_rwsem); return ret; + +err: + free_shrinker_info(memcg); + return -ENOMEM; } static struct shrinker_info *shrinker_info_protected(struct mem_cgroup *memcg, @@ -71,15 +106,12 @@ static struct shrinker_info *shrinker_info_protected(struct mem_cgroup *memcg, lockdep_is_held(&shrinker_rwsem)); } -static int expand_one_shrinker_info(struct mem_cgroup *memcg, - int map_size, int defer_size, - int old_map_size, int old_defer_size, - int new_nr_max) +static int expand_one_shrinker_info(struct mem_cgroup *memcg, int new_size, + int old_size, int new_nr_max) { struct shrinker_info *new, *old; struct mem_cgroup_per_node *pn; int nid; - int size = map_size + defer_size; for_each_node(nid) { pn = memcg->nodeinfo[nid]; @@ -92,21 +124,18 @@ static int expand_one_shrinker_info(struct mem_cgroup *memcg, if (new_nr_max <= old->map_nr_max) continue; - new = kvmalloc_node(sizeof(*new) + size, GFP_KERNEL, nid); + new = kvmalloc_node(sizeof(*new) + new_size, GFP_KERNEL, nid); if (!new) return -ENOMEM; - new->nr_deferred = (atomic_long_t *)(new + 1); - new->map = (void *)new->nr_deferred + defer_size; new->map_nr_max = new_nr_max; - /* map: set all old bits, clear all new bits */ - memset(new->map, (int)0xff, old_map_size); - memset((void *)new->map + old_map_size, 0, map_size - old_map_size); - /* nr_deferred: copy old values, clear all new values */ - memcpy(new->nr_deferred, old->nr_deferred, old_defer_size); - memset((void *)new->nr_deferred + old_defer_size, 0, - defer_size - old_defer_size); + /* copy old values, allocate all new values */ + memcpy(new->unit, old->unit, old_size); + if (shrinker_unit_alloc(new, old, nid)) { + kvfree(new); + return -ENOMEM; + } rcu_assign_pointer(pn->shrinker_info, new); kvfree_rcu(old, rcu); @@ -118,9 +147,8 @@ static int expand_one_shrinker_info(struct mem_cgroup *memcg, static int expand_shrinker_info(int new_id) { int ret = 0; - int new_nr_max = round_up(new_id + 1, BITS_PER_LONG); - int map_size, defer_size = 0; - int old_map_size, old_defer_size = 0; + int new_nr_max = round_up(new_id + 1, SHRINKER_UNIT_BITS); + int new_size, old_size = 0; struct mem_cgroup *memcg; if (!root_mem_cgroup) @@ -128,15 +156,12 @@ static int expand_shrinker_info(int new_id) lockdep_assert_held(&shrinker_rwsem); - map_size = shrinker_map_size(new_nr_max); - defer_size = shrinker_defer_size(new_nr_max); - old_map_size = shrinker_map_size(shrinker_nr_max); - old_defer_size = shrinker_defer_size(shrinker_nr_max); + new_size = shrinker_unit_size(new_nr_max); + old_size = shrinker_unit_size(shrinker_nr_max); memcg = mem_cgroup_iter(NULL, NULL, NULL); do { - ret = expand_one_shrinker_info(memcg, map_size, defer_size, - old_map_size, old_defer_size, + ret = expand_one_shrinker_info(memcg, new_size, old_size, new_nr_max); if (ret) { mem_cgroup_iter_break(NULL, memcg); @@ -150,17 +175,34 @@ static int expand_shrinker_info(int new_id) return ret; } +static inline int shriner_id_to_index(int shrinker_id) +{ + return shrinker_id / SHRINKER_UNIT_BITS; +} + +static inline int shriner_id_to_offset(int shrinker_id) +{ + return shrinker_id % SHRINKER_UNIT_BITS; +} + +static inline int calc_shrinker_id(int index, int offset) +{ + return index * SHRINKER_UNIT_BITS + offset; +} + void set_shrinker_bit(struct mem_cgroup *memcg, int nid, int shrinker_id) { if (shrinker_id >= 0 && memcg && !mem_cgroup_is_root(memcg)) { struct shrinker_info *info; + struct shrinker_info_unit *unit; rcu_read_lock(); info = rcu_dereference(memcg->nodeinfo[nid]->shrinker_info); + unit = info->unit[shriner_id_to_index(shrinker_id)]; if (!WARN_ON_ONCE(shrinker_id >= info->map_nr_max)) { /* Pairs with smp mb in shrink_slab() */ smp_mb__before_atomic(); - set_bit(shrinker_id, info->map); + set_bit(shriner_id_to_offset(shrinker_id), unit->map); } rcu_read_unlock(); } @@ -209,26 +251,31 @@ static long xchg_nr_deferred_memcg(int nid, struct shrinker *shrinker, struct mem_cgroup *memcg) { struct shrinker_info *info; + struct shrinker_info_unit *unit; info = shrinker_info_protected(memcg, nid); - return atomic_long_xchg(&info->nr_deferred[shrinker->id], 0); + unit = info->unit[shriner_id_to_index(shrinker->id)]; + return atomic_long_xchg(&unit->nr_deferred[shriner_id_to_offset(shrinker->id)], 0); } static long add_nr_deferred_memcg(long nr, int nid, struct shrinker *shrinker, struct mem_cgroup *memcg) { struct shrinker_info *info; + struct shrinker_info_unit *unit; info = shrinker_info_protected(memcg, nid); - return atomic_long_add_return(nr, &info->nr_deferred[shrinker->id]); + unit = info->unit[shriner_id_to_index(shrinker->id)]; + return atomic_long_add_return(nr, &unit->nr_deferred[shriner_id_to_offset(shrinker->id)]); } void reparent_shrinker_deferred(struct mem_cgroup *memcg) { - int i, nid; + int nid, index, offset; long nr; struct mem_cgroup *parent; struct shrinker_info *child_info, *parent_info; + struct shrinker_info_unit *child_unit, *parent_unit; parent = parent_mem_cgroup(memcg); if (!parent) @@ -239,9 +286,13 @@ void reparent_shrinker_deferred(struct mem_cgroup *memcg) for_each_node(nid) { child_info = shrinker_info_protected(memcg, nid); parent_info = shrinker_info_protected(parent, nid); - for (i = 0; i < child_info->map_nr_max; i++) { - nr = atomic_long_read(&child_info->nr_deferred[i]); - atomic_long_add(nr, &parent_info->nr_deferred[i]); + for (index = 0; index < shriner_id_to_index(child_info->map_nr_max); index++) { + child_unit = child_info->unit[index]; + parent_unit = parent_info->unit[index]; + for (offset = 0; offset < SHRINKER_UNIT_BITS; offset++) { + nr = atomic_long_read(&child_unit->nr_deferred[offset]); + atomic_long_add(nr, &parent_unit->nr_deferred[offset]); + } } } up_read(&shrinker_rwsem); @@ -407,7 +458,7 @@ static unsigned long shrink_slab_memcg(gfp_t gfp_mask, int nid, { struct shrinker_info *info; unsigned long ret, freed = 0; - int i; + int offset, index = 0; if (!mem_cgroup_online(memcg)) return 0; @@ -419,56 +470,63 @@ static unsigned long shrink_slab_memcg(gfp_t gfp_mask, int nid, if (unlikely(!info)) goto unlock; - for_each_set_bit(i, info->map, info->map_nr_max) { - struct shrink_control sc = { - .gfp_mask = gfp_mask, - .nid = nid, - .memcg = memcg, - }; - struct shrinker *shrinker; + for (; index < shriner_id_to_index(info->map_nr_max); index++) { + struct shrinker_info_unit *unit; - shrinker = idr_find(&shrinker_idr, i); - if (unlikely(!shrinker || !(shrinker->flags & SHRINKER_REGISTERED))) { - if (!shrinker) - clear_bit(i, info->map); - continue; - } + unit = info->unit[index]; - /* Call non-slab shrinkers even though kmem is disabled */ - if (!memcg_kmem_online() && - !(shrinker->flags & SHRINKER_NONSLAB)) - continue; + for_each_set_bit(offset, unit->map, SHRINKER_UNIT_BITS) { + struct shrink_control sc = { + .gfp_mask = gfp_mask, + .nid = nid, + .memcg = memcg, + }; + struct shrinker *shrinker; + int shrinker_id = calc_shrinker_id(index, offset); - ret = do_shrink_slab(&sc, shrinker, priority); - if (ret == SHRINK_EMPTY) { - clear_bit(i, info->map); - /* - * After the shrinker reported that it had no objects to - * free, but before we cleared the corresponding bit in - * the memcg shrinker map, a new object might have been - * added. To make sure, we have the bit set in this - * case, we invoke the shrinker one more time and reset - * the bit if it reports that it is not empty anymore. - * The memory barrier here pairs with the barrier in - * set_shrinker_bit(): - * - * list_lru_add() shrink_slab_memcg() - * list_add_tail() clear_bit() - * - * set_bit() do_shrink_slab() - */ - smp_mb__after_atomic(); - ret = do_shrink_slab(&sc, shrinker, priority); - if (ret == SHRINK_EMPTY) - ret = 0; - else - set_shrinker_bit(memcg, nid, i); - } - freed += ret; + shrinker = idr_find(&shrinker_idr, shrinker_id); + if (unlikely(!shrinker || !(shrinker->flags & SHRINKER_REGISTERED))) { + if (!shrinker) + clear_bit(offset, unit->map); + continue; + } - if (rwsem_is_contended(&shrinker_rwsem)) { - freed = freed ? : 1; - break; + /* Call non-slab shrinkers even though kmem is disabled */ + if (!memcg_kmem_online() && + !(shrinker->flags & SHRINKER_NONSLAB)) + continue; + + ret = do_shrink_slab(&sc, shrinker, priority); + if (ret == SHRINK_EMPTY) { + clear_bit(offset, unit->map); + /* + * After the shrinker reported that it had no objects to + * free, but before we cleared the corresponding bit in + * the memcg shrinker map, a new object might have been + * added. To make sure, we have the bit set in this + * case, we invoke the shrinker one more time and reset + * the bit if it reports that it is not empty anymore. + * The memory barrier here pairs with the barrier in + * set_shrinker_bit(): + * + * list_lru_add() shrink_slab_memcg() + * list_add_tail() clear_bit() + * + * set_bit() do_shrink_slab() + */ + smp_mb__after_atomic(); + ret = do_shrink_slab(&sc, shrinker, priority); + if (ret == SHRINK_EMPTY) + ret = 0; + else + set_shrinker_bit(memcg, nid, shrinker_id); + } + freed += ret; + + if (rwsem_is_contended(&shrinker_rwsem)) { + freed = freed ? : 1; + goto unlock; + } } } unlock: From patchwork Thu Jul 27 08:04:59 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329635 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 39B71D50E for ; Thu, 27 Jul 2023 08:25:04 +0000 (UTC) Received: from mail-oa1-x30.google.com (mail-oa1-x30.google.com [IPv6:2001:4860:4864:20::30]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DDB6FC9B4 for ; Thu, 27 Jul 2023 01:24:41 -0700 (PDT) Received: by mail-oa1-x30.google.com with SMTP id 586e51a60fabf-1b773fa5863so155196fac.1 for ; Thu, 27 Jul 2023 01:24:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690446268; x=1691051068; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=VvZzKGLWBPnU/YifQKDl8Wb9pt+zZKHS88YiwcrJMO0=; b=PC3KmV85V548alX3fS4mrzmu9LO4St1VP1MwFIrE+WvHVF4hZ8z03oC0BUUC9fLcmg b2B1xlMjcwHgjgf4RK4Je/y52ulL+cwN1g//8qBHKhsjn/1ZgCHSOzug+KeaM/zFjZAv R+FwSMgo9yrPAky/EXbpDMEaHpXQoNfPw7sTK653EQr2UdqT6FxVplJNiP4/I5fhnRzy eAswuQWeCTpMOFTseD4A6tgb7AKqxs4MVtcwJbcVZKaea39wOU2yi9RDLOFbgFT2w0DR JNXPELEArw/KY33SAKMR0yqFFXt/Lh3VjSsY5TyZT13emJgELDn9bKAzp2EcL7/yaC4O nvDg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690446268; x=1691051068; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=VvZzKGLWBPnU/YifQKDl8Wb9pt+zZKHS88YiwcrJMO0=; b=X5+6jDTgkX0gZ8lubQO0ExAAl4gNqHccBJaCemtP5IUBiz15LyoRAQyzyXtDx74u7q Inyk/VfYc+3PFsN2En8Za5lFfMqrB0Bevwlq64l5spJ6b8Z6o+9BdEsjdYAEym0eIhfD kiijXnxtQdqktLLpre35oSlOX90O3aXBCnuHllt90gp04+j36NHoY/KLvt2duQ7cAOYI kNAc7vXhlorPKqFF5MSsOhAOa+vkecXdkRwVEVFmkpbhzD4X5se+aU/sBNwxudyBhyI0 LP4bTyxJEWAHIgW0+Mfpq7y9/aR1oAPyA1BRg9Vdmrhl8em7ig5AAB9uWVFU2r/0MyRk PtrQ== X-Gm-Message-State: ABy/qLbnuenAjjG4rIi/n0hFz/BqF9vaRfTPERL4YW1Q64I+xEySCpix I3Zg7ccgXM4TUyl1BP9jMCaM+orU0XsISdTrrAI= X-Google-Smtp-Source: APBJJlFdwRyoe8DFBb0YfEbWLnk7UTz07biEby4+6kjTFVFVYib+WaYPD1SK6i9vhrIynDbldBSUcQ== X-Received: by 2002:a62:1d04:0:b0:66f:3fc5:6167 with SMTP id d4-20020a621d04000000b0066f3fc56167mr4406413pfd.1.1690445710333; Thu, 27 Jul 2023 01:15:10 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.14.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:15:09 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH v3 46/49] mm: shrinker: make global slab shrink lockless Date: Thu, 27 Jul 2023 16:04:59 +0800 Message-Id: <20230727080502.77895-47-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_BLOCKED, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net The shrinker_rwsem is a global read-write lock in shrinkers subsystem, which protects most operations such as slab shrink, registration and unregistration of shrinkers, etc. This can easily cause problems in the following cases. 1) When the memory pressure is high and there are many filesystems mounted or unmounted at the same time, slab shrink will be affected (down_read_trylock() failed). Such as the real workload mentioned by Kirill Tkhai: ``` One of the real workloads from my experience is start of an overcommitted node containing many starting containers after node crash (or many resuming containers after reboot for kernel update). In these cases memory pressure is huge, and the node goes round in long reclaim. ``` 2) If a shrinker is blocked (such as the case mentioned in [1]) and a writer comes in (such as mount a fs), then this writer will be blocked and cause all subsequent shrinker-related operations to be blocked. Even if there is no competitor when shrinking slab, there may still be a problem. The down_read_trylock() may become a perf hotspot with frequent calls to shrink_slab(). Because of the poor multicore scalability of atomic operations, this can lead to a significant drop in IPC (instructions per cycle). We used to implement the lockless slab shrink with SRCU [2], but then kernel test robot reported -88.8% regression in stress-ng.ramfs.ops_per_sec test case [3], so we reverted it [4]. This commit uses the refcount+RCU method [5] proposed by Dave Chinner to re-implement the lockless global slab shrink. The memcg slab shrink is handled in the subsequent patch. For now, all shrinker instances are converted to dynamically allocated and will be freed by call_rcu(). So we can use rcu_read_{lock,unlock}() to ensure that the shrinker instance is valid. And the shrinker instance will not be run again after unregistration. So the structure that records the pointer of shrinker instance can be safely freed without waiting for the RCU read-side critical section. In this way, while we implement the lockless slab shrink, we don't need to be blocked in unregister_shrinker(). The following are the test results: stress-ng --timeout 60 --times --verify --metrics-brief --ramfs 9 & 1) Before applying this patchset: setting to a 60 second run per stressor dispatching hogs: 9 ramfs stressor bogo ops real time usr time sys time bogo ops/s bogo ops/s (secs) (secs) (secs) (real time) (usr+sys time) ramfs 735238 60.00 12.37 363.70 12253.05 1955.08 for a 60.01s run time: 1440.27s available CPU time 12.36s user time ( 0.86%) 363.70s system time ( 25.25%) 376.06s total time ( 26.11%) load average: 10.79 4.47 1.69 passed: 9: ramfs (9) failed: 0 skipped: 0 successful run completed in 60.01s (1 min, 0.01 secs) 2) After applying this patchset: setting to a 60 second run per stressor dispatching hogs: 9 ramfs stressor bogo ops real time usr time sys time bogo ops/s bogo ops/s (secs) (secs) (secs) (real time) (usr+sys time) ramfs 746698 60.00 12.45 376.16 12444.02 1921.47 for a 60.01s run time: 1440.28s available CPU time 12.44s user time ( 0.86%) 376.16s system time ( 26.12%) 388.60s total time ( 26.98%) load average: 9.01 3.85 1.49 passed: 9: ramfs (9) failed: 0 skipped: 0 successful run completed in 60.01s (1 min, 0.01 secs) We can see that the ops/s has hardly changed. [1]. https://lore.kernel.org/lkml/20191129214541.3110-1-ptikhomirov@virtuozzo.com/ [2]. https://lore.kernel.org/lkml/20230313112819.38938-1-zhengqi.arch@bytedance.com/ [3]. https://lore.kernel.org/lkml/202305230837.db2c233f-yujie.liu@intel.com/ [4]. https://lore.kernel.org/all/20230609081518.3039120-1-qi.zheng@linux.dev/ [5]. https://lore.kernel.org/lkml/ZIJhou1d55d4H1s0@dread.disaster.area/ Signed-off-by: Qi Zheng --- include/linux/shrinker.h | 17 ++++++++++ mm/shrinker.c | 70 +++++++++++++++++++++++++++++----------- 2 files changed, 68 insertions(+), 19 deletions(-) diff --git a/include/linux/shrinker.h b/include/linux/shrinker.h index eb342994675a..f06225f18531 100644 --- a/include/linux/shrinker.h +++ b/include/linux/shrinker.h @@ -4,6 +4,8 @@ #include #include +#include +#include #define SHRINKER_UNIT_BITS BITS_PER_LONG @@ -87,6 +89,10 @@ struct shrinker { int seeks; /* seeks to recreate an obj */ unsigned flags; + refcount_t refcount; + struct completion done; + struct rcu_head rcu; + void *private_data; /* These are for internal use */ @@ -120,6 +126,17 @@ struct shrinker *shrinker_alloc(unsigned int flags, const char *fmt, ...); void shrinker_register(struct shrinker *shrinker); void shrinker_free(struct shrinker *shrinker); +static inline bool shrinker_try_get(struct shrinker *shrinker) +{ + return refcount_inc_not_zero(&shrinker->refcount); +} + +static inline void shrinker_put(struct shrinker *shrinker) +{ + if (refcount_dec_and_test(&shrinker->refcount)) + complete(&shrinker->done); +} + #ifdef CONFIG_SHRINKER_DEBUG extern int __printf(2, 3) shrinker_debugfs_rename(struct shrinker *shrinker, const char *fmt, ...); diff --git a/mm/shrinker.c b/mm/shrinker.c index 1911c06b8af5..d318f5621862 100644 --- a/mm/shrinker.c +++ b/mm/shrinker.c @@ -2,6 +2,7 @@ #include #include #include +#include #include #include "internal.h" @@ -577,33 +578,42 @@ unsigned long shrink_slab(gfp_t gfp_mask, int nid, struct mem_cgroup *memcg, if (!mem_cgroup_disabled() && !mem_cgroup_is_root(memcg)) return shrink_slab_memcg(gfp_mask, nid, memcg, priority); - if (!down_read_trylock(&shrinker_rwsem)) - goto out; - - list_for_each_entry(shrinker, &shrinker_list, list) { + rcu_read_lock(); + list_for_each_entry_rcu(shrinker, &shrinker_list, list) { struct shrink_control sc = { .gfp_mask = gfp_mask, .nid = nid, .memcg = memcg, }; + if (!shrinker_try_get(shrinker)) + continue; + + /* + * We can safely unlock the RCU lock here since we already + * hold the refcount of the shrinker. + */ + rcu_read_unlock(); + ret = do_shrink_slab(&sc, shrinker, priority); if (ret == SHRINK_EMPTY) ret = 0; freed += ret; + /* - * Bail out if someone want to register a new shrinker to - * prevent the registration from being stalled for long periods - * by parallel ongoing shrinking. + * This shrinker may be deleted from shrinker_list and freed + * after the shrinker_put() below, but this shrinker is still + * used for the next traversal. So it is necessary to hold the + * RCU lock first to prevent this shrinker from being freed, + * which also ensures that the next shrinker that is traversed + * will not be freed (even if it is deleted from shrinker_list + * at the same time). */ - if (rwsem_is_contended(&shrinker_rwsem)) { - freed = freed ? : 1; - break; - } + rcu_read_lock(); + shrinker_put(shrinker); } - up_read(&shrinker_rwsem); -out: + rcu_read_unlock(); cond_resched(); return freed; } @@ -671,13 +681,29 @@ void shrinker_register(struct shrinker *shrinker) } down_write(&shrinker_rwsem); - list_add_tail(&shrinker->list, &shrinker_list); + list_add_tail_rcu(&shrinker->list, &shrinker_list); shrinker->flags |= SHRINKER_REGISTERED; shrinker_debugfs_add(shrinker); up_write(&shrinker_rwsem); + + init_completion(&shrinker->done); + /* + * Now the shrinker is fully set up, take the first reference to it to + * indicate that lookup operations are now allowed to use it via + * shrinker_try_get(). + */ + refcount_set(&shrinker->refcount, 1); } EXPORT_SYMBOL_GPL(shrinker_register); +static void shrinker_free_rcu_cb(struct rcu_head *head) +{ + struct shrinker *shrinker = container_of(head, struct shrinker, rcu); + + kfree(shrinker->nr_deferred); + kfree(shrinker); +} + void shrinker_free(struct shrinker *shrinker) { struct dentry *debugfs_entry = NULL; @@ -686,9 +712,18 @@ void shrinker_free(struct shrinker *shrinker) if (!shrinker) return; + if (shrinker->flags & SHRINKER_REGISTERED) { + shrinker_put(shrinker); + wait_for_completion(&shrinker->done); + } + down_write(&shrinker_rwsem); if (shrinker->flags & SHRINKER_REGISTERED) { - list_del(&shrinker->list); + /* + * Lookups on the shrinker are over and will fail in the future, + * so we can now remove it from the lists and free it. + */ + list_del_rcu(&shrinker->list); debugfs_entry = shrinker_debugfs_detach(shrinker, &debugfs_id); shrinker->flags &= ~SHRINKER_REGISTERED; } else { @@ -702,9 +737,6 @@ void shrinker_free(struct shrinker *shrinker) if (debugfs_entry) shrinker_debugfs_remove(debugfs_entry, debugfs_id); - kfree(shrinker->nr_deferred); - shrinker->nr_deferred = NULL; - - kfree(shrinker); + call_rcu(&shrinker->rcu, shrinker_free_rcu_cb); } EXPORT_SYMBOL_GPL(shrinker_free); From patchwork Thu Jul 27 08:05:00 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329549 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C3837D30D for ; Thu, 27 Jul 2023 08:20:31 +0000 (UTC) Received: from mail-pf1-f169.google.com (mail-pf1-f169.google.com [209.85.210.169]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E85A37A8A for ; Thu, 27 Jul 2023 01:20:25 -0700 (PDT) Received: by mail-pf1-f169.google.com with SMTP id d2e1a72fcca58-6748a616e17so184174b3a.1 for ; Thu, 27 Jul 2023 01:20:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445722; x=1691050522; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=kfKKsEp61SZUnTy00HUcIO/dAXsDrrCBrc1q4f5gA2g=; b=EAS6K8pjZHV2xJO1k0B0O2ENzb3/Vvl+c5sC6vZF5+RNctHPYXK3F4aD7Xzt8amvSX Sp0sM3dY6nrfZgyX03OOoIKbasLRWXH327iv4+GYUr4WlO1QPIHvBbrRjUoddMLJYEtj qslIbW38aWpZfadSfI+TaMUP7PcrUPJ3woAJMv4ugKgPJM767PAG7K9gWxMSKIL9CKj3 w5CY/SzoV5mu91kUw+3ztoEROa7i9Mv96qiOzuHElFUZjh2ImlDQY3RLu003MMnVyV3S TQhJNq9ppxsbvsUjd927IP6iiwsq7VIfzEbkN9zPwoI9Valaw0w8Qu8JFGFsYg3rQsoY gM7w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445722; x=1691050522; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=kfKKsEp61SZUnTy00HUcIO/dAXsDrrCBrc1q4f5gA2g=; b=P7IKYM+ESc5wXPZlJB8Sj85uLL8CO50uu1qxDFIqsrOWbWoHYYvoxB0EnRkxzJwx7r EnmTizEgTLFl1cFQbsFsou6AqM730CNbhFdRUkrXrz4MIMeYBI2UHPTraT7keTSp4hiA 8qgUXQ3OZQmvjRgIuWIrXvEHer5Qh9NbVZSHEVQLvOaHoHjmP4rkVydHGhXiLNFTf6EI cMqVgJ1K+TgsQi1cO/sx5hZnmmCzqkROlTF0ASxbZs3Kj99Ee7w5Mk9KsgUB6TM//aaR HQzDKWrsrPfoV0OZFDK9jqUgKaXWtlE+MjShc9xG7MZ1o6kHBOV57YrTL3ozSo35Iwo7 ycKg== X-Gm-Message-State: ABy/qLYUlsLN9D9pnDsz5eictUEq5+4DyybFiz4zmMNE1Z6bwNHuMBwP 1TlOjwHuNFyIiGp92k14fMjYrQ== X-Google-Smtp-Source: APBJJlGaIHiWHX80BWphqmbYYC2Qe9rA0t1NXuG9/ru/q26OnfFQXVEhM5bGyqGhtVnixSectLT5LA== X-Received: by 2002:a05:6a00:4792:b0:668:834d:4bd with SMTP id dh18-20020a056a00479200b00668834d04bdmr4689753pfb.0.1690445722143; Thu, 27 Jul 2023 01:15:22 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.15.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:15:21 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH v3 47/49] mm: shrinker: make memcg slab shrink lockless Date: Thu, 27 Jul 2023 16:05:00 +0800 Message-Id: <20230727080502.77895-48-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_NONE, T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Like global slab shrink, this commit also uses refcount+RCU method to make memcg slab shrink lockless. Use the following script to do slab shrink stress test: ``` DIR="/root/shrinker/memcg/mnt" do_create() { mkdir -p /sys/fs/cgroup/memory/test echo 4G > /sys/fs/cgroup/memory/test/memory.limit_in_bytes for i in `seq 0 $1`; do mkdir -p /sys/fs/cgroup/memory/test/$i; echo $$ > /sys/fs/cgroup/memory/test/$i/cgroup.procs; mkdir -p $DIR/$i; done } do_mount() { for i in `seq $1 $2`; do mount -t tmpfs $i $DIR/$i; done } do_touch() { for i in `seq $1 $2`; do echo $$ > /sys/fs/cgroup/memory/test/$i/cgroup.procs; dd if=/dev/zero of=$DIR/$i/file$i bs=1M count=1 & done } case "$1" in touch) do_touch $2 $3 ;; test) do_create 4000 do_mount 0 4000 do_touch 0 3000 ;; *) exit 1 ;; esac ``` Save the above script, then run test and touch commands. Then we can use the following perf command to view hotspots: perf top -U -F 999 1) Before applying this patchset: 40.44% [kernel] [k] down_read_trylock 17.59% [kernel] [k] up_read 13.64% [kernel] [k] pv_native_safe_halt 11.90% [kernel] [k] shrink_slab 8.21% [kernel] [k] idr_find 2.71% [kernel] [k] _find_next_bit 1.36% [kernel] [k] shrink_node 0.81% [kernel] [k] shrink_lruvec 0.80% [kernel] [k] __radix_tree_lookup 0.50% [kernel] [k] do_shrink_slab 0.21% [kernel] [k] list_lru_count_one 0.16% [kernel] [k] mem_cgroup_iter 2) After applying this patchset: 60.17% [kernel] [k] shrink_slab 20.42% [kernel] [k] pv_native_safe_halt 3.03% [kernel] [k] do_shrink_slab 2.73% [kernel] [k] shrink_node 2.27% [kernel] [k] shrink_lruvec 2.00% [kernel] [k] __rcu_read_unlock 1.92% [kernel] [k] mem_cgroup_iter 0.98% [kernel] [k] __rcu_read_lock 0.91% [kernel] [k] osq_lock 0.63% [kernel] [k] mem_cgroup_calculate_protection 0.55% [kernel] [k] shrinker_put 0.46% [kernel] [k] list_lru_count_one We can see that the first perf hotspot becomes shrink_slab, which is what we expect. Signed-off-by: Qi Zheng --- mm/shrinker.c | 80 ++++++++++++++++++++++++++++++++++----------------- 1 file changed, 54 insertions(+), 26 deletions(-) diff --git a/mm/shrinker.c b/mm/shrinker.c index d318f5621862..fee6f62904fb 100644 --- a/mm/shrinker.c +++ b/mm/shrinker.c @@ -107,6 +107,12 @@ static struct shrinker_info *shrinker_info_protected(struct mem_cgroup *memcg, lockdep_is_held(&shrinker_rwsem)); } +static struct shrinker_info *shrinker_info_rcu(struct mem_cgroup *memcg, + int nid) +{ + return rcu_dereference(memcg->nodeinfo[nid]->shrinker_info); +} + static int expand_one_shrinker_info(struct mem_cgroup *memcg, int new_size, int old_size, int new_nr_max) { @@ -198,7 +204,7 @@ void set_shrinker_bit(struct mem_cgroup *memcg, int nid, int shrinker_id) struct shrinker_info_unit *unit; rcu_read_lock(); - info = rcu_dereference(memcg->nodeinfo[nid]->shrinker_info); + info = shrinker_info_rcu(memcg, nid); unit = info->unit[shriner_id_to_index(shrinker_id)]; if (!WARN_ON_ONCE(shrinker_id >= info->map_nr_max)) { /* Pairs with smp mb in shrink_slab() */ @@ -211,7 +217,7 @@ void set_shrinker_bit(struct mem_cgroup *memcg, int nid, int shrinker_id) static DEFINE_IDR(shrinker_idr); -static int prealloc_memcg_shrinker(struct shrinker *shrinker) +static int shrinker_memcg_alloc(struct shrinker *shrinker) { int id, ret = -ENOMEM; @@ -219,7 +225,6 @@ static int prealloc_memcg_shrinker(struct shrinker *shrinker) return -ENOSYS; down_write(&shrinker_rwsem); - /* This may call shrinker, so it must use down_read_trylock() */ id = idr_alloc(&shrinker_idr, shrinker, 0, 0, GFP_KERNEL); if (id < 0) goto unlock; @@ -237,7 +242,7 @@ static int prealloc_memcg_shrinker(struct shrinker *shrinker) return ret; } -static void unregister_memcg_shrinker(struct shrinker *shrinker) +static void shrinker_memcg_remove(struct shrinker *shrinker) { int id = shrinker->id; @@ -253,10 +258,15 @@ static long xchg_nr_deferred_memcg(int nid, struct shrinker *shrinker, { struct shrinker_info *info; struct shrinker_info_unit *unit; + long nr_deferred; - info = shrinker_info_protected(memcg, nid); + rcu_read_lock(); + info = shrinker_info_rcu(memcg, nid); unit = info->unit[shriner_id_to_index(shrinker->id)]; - return atomic_long_xchg(&unit->nr_deferred[shriner_id_to_offset(shrinker->id)], 0); + nr_deferred = atomic_long_xchg(&unit->nr_deferred[shriner_id_to_offset(shrinker->id)], 0); + rcu_read_unlock(); + + return nr_deferred; } static long add_nr_deferred_memcg(long nr, int nid, struct shrinker *shrinker, @@ -264,10 +274,16 @@ static long add_nr_deferred_memcg(long nr, int nid, struct shrinker *shrinker, { struct shrinker_info *info; struct shrinker_info_unit *unit; + long nr_deferred; - info = shrinker_info_protected(memcg, nid); + rcu_read_lock(); + info = shrinker_info_rcu(memcg, nid); unit = info->unit[shriner_id_to_index(shrinker->id)]; - return atomic_long_add_return(nr, &unit->nr_deferred[shriner_id_to_offset(shrinker->id)]); + nr_deferred = + atomic_long_add_return(nr, &unit->nr_deferred[shriner_id_to_offset(shrinker->id)]); + rcu_read_unlock(); + + return nr_deferred; } void reparent_shrinker_deferred(struct mem_cgroup *memcg) @@ -299,12 +315,12 @@ void reparent_shrinker_deferred(struct mem_cgroup *memcg) up_read(&shrinker_rwsem); } #else -static int prealloc_memcg_shrinker(struct shrinker *shrinker) +static int shrinker_memcg_alloc(struct shrinker *shrinker) { return -ENOSYS; } -static void unregister_memcg_shrinker(struct shrinker *shrinker) +static void shrinker_memcg_remove(struct shrinker *shrinker) { } @@ -464,18 +480,23 @@ static unsigned long shrink_slab_memcg(gfp_t gfp_mask, int nid, if (!mem_cgroup_online(memcg)) return 0; - if (!down_read_trylock(&shrinker_rwsem)) - return 0; - - info = shrinker_info_protected(memcg, nid); +again: + rcu_read_lock(); + info = shrinker_info_rcu(memcg, nid); if (unlikely(!info)) goto unlock; - for (; index < shriner_id_to_index(info->map_nr_max); index++) { + if (index < shriner_id_to_index(info->map_nr_max)) { struct shrinker_info_unit *unit; unit = info->unit[index]; + /* + * The shrinker_info_unit will not be freed, so we can + * safely release the RCU lock here. + */ + rcu_read_unlock(); + for_each_set_bit(offset, unit->map, SHRINKER_UNIT_BITS) { struct shrink_control sc = { .gfp_mask = gfp_mask, @@ -485,12 +506,14 @@ static unsigned long shrink_slab_memcg(gfp_t gfp_mask, int nid, struct shrinker *shrinker; int shrinker_id = calc_shrinker_id(index, offset); + rcu_read_lock(); shrinker = idr_find(&shrinker_idr, shrinker_id); - if (unlikely(!shrinker || !(shrinker->flags & SHRINKER_REGISTERED))) { - if (!shrinker) - clear_bit(offset, unit->map); + if (unlikely(!shrinker || !shrinker_try_get(shrinker))) { + clear_bit(offset, unit->map); + rcu_read_unlock(); continue; } + rcu_read_unlock(); /* Call non-slab shrinkers even though kmem is disabled */ if (!memcg_kmem_online() && @@ -523,15 +546,20 @@ static unsigned long shrink_slab_memcg(gfp_t gfp_mask, int nid, set_shrinker_bit(memcg, nid, shrinker_id); } freed += ret; - - if (rwsem_is_contended(&shrinker_rwsem)) { - freed = freed ? : 1; - goto unlock; - } + shrinker_put(shrinker); } + + /* + * We have already exited the read-side of rcu critical section + * before calling do_shrink_slab(), the shrinker_info may be + * released in expand_one_shrinker_info(), so reacquire the + * shrinker_info. + */ + index++; + goto again; } unlock: - up_read(&shrinker_rwsem); + rcu_read_unlock(); return freed; } #else /* !CONFIG_MEMCG */ @@ -638,7 +666,7 @@ struct shrinker *shrinker_alloc(unsigned int flags, const char *fmt, ...) shrinker->flags = flags | SHRINKER_ALLOCATED; if (flags & SHRINKER_MEMCG_AWARE) { - err = prealloc_memcg_shrinker(shrinker); + err = shrinker_memcg_alloc(shrinker); if (err == -ENOSYS) shrinker->flags &= ~SHRINKER_MEMCG_AWARE; else if (err == 0) @@ -731,7 +759,7 @@ void shrinker_free(struct shrinker *shrinker) } if (shrinker->flags & SHRINKER_MEMCG_AWARE) - unregister_memcg_shrinker(shrinker); + shrinker_memcg_remove(shrinker); up_write(&shrinker_rwsem); if (debugfs_entry) From patchwork Thu Jul 27 08:05:01 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329550 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 255F5DDD9 for ; Thu, 27 Jul 2023 08:20:46 +0000 (UTC) Received: from mail-pf1-f174.google.com (mail-pf1-f174.google.com [209.85.210.174]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 086AF11CAC for ; Thu, 27 Jul 2023 01:20:34 -0700 (PDT) Received: by mail-pf1-f174.google.com with SMTP id d2e1a72fcca58-66d6a9851f3so168979b3a.0 for ; Thu, 27 Jul 2023 01:20:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445734; x=1691050534; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=X5ij/O+E/bk/tTzX9mgxwiCynzBHcXx4EKtI9EsHayo=; b=j4pDVeMcXcw7i7IAx1DNlz6iKEYUEIabVz59nN5q7bAhCS1y2gOKuzdzTgG4j/dBwO H4HIbZq+pOLjZVM5UGP2bbBpIOa2ebzQlUp84F0j/JFisMPJqEmZ2hJuFivDCiuZb9qk P5NgTQLX0gtg3X+vGmP6/3oCCgeQ9FljDUkAtb6pQhQ/VT+3lIzONbNoOLFITLjS+g+5 Vjj6M2H3z3FRG2iT9u3T7VH/LPW2zOuTNtSoF+jLae0SEMd2/P/I3VxNY7Hl9q3RH2MH NSqRY7EFleJMoWuU3X7ly6d0/rJ15DhvMCCJQ4sCCtoszhR0yDF7rbG/n/mEuDtWN3AJ wtVg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445734; x=1691050534; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=X5ij/O+E/bk/tTzX9mgxwiCynzBHcXx4EKtI9EsHayo=; b=k58WGq5f9b65isxDEaYa7QWxRHrhPM3jOtPZGGwKUvoBr4t6llOQ9lSQxj5N6my2WQ PJsSk4htlSgw4qEW5vJw8nCQSgCVPEQ8iyBIosdqntrmov7jKtiUBC0o0EJzv3Rk/rgm zpcMJfOCp1Z8QszIPRbebkcaIzy1nehPoHr0exYrXImEcHNDK2jj7HDF4S3Ulnnv3TTW hCAVyxw6fLVPtI8SpOZusz2owWYCOxOLDb0tlVIXDHVnPNa8/KmrIv4s9zGBVYsxzBdX mu6Sv3nCV7ZMAh67UsF9H0TwXBQ1mUXpN0IPtRo9laDEOrKmjyNenRvZQ1KPbrDbbc/V HxQQ== X-Gm-Message-State: ABy/qLbm5ltbl+lyQ6iBPce7DLSbB5LBwb3Ze78K5fM6Re4luN4WowU0 fmqm3GbRxXvO1eqdlXCa7wpEZQ== X-Google-Smtp-Source: APBJJlGCk2Vrs4jG84R1mGLjwsvlQmrr2Zz0KCmUr/tZ9etimLEYhkynVpF/d5AFiEeYea7/v2C0Wg== X-Received: by 2002:a05:6a20:7d87:b0:12e:f6e6:882b with SMTP id v7-20020a056a207d8700b0012ef6e6882bmr6451328pzj.1.1690445734330; Thu, 27 Jul 2023 01:15:34 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.15.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:15:33 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH v3 48/49] mm: shrinker: hold write lock to reparent shrinker nr_deferred Date: Thu, 27 Jul 2023 16:05:01 +0800 Message-Id: <20230727080502.77895-49-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_BLOCKED, RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_NONE, T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net For now, reparent_shrinker_deferred() is the only holder of read lock of shrinker_rwsem. And it already holds the global cgroup_mutex, so it will not be called in parallel. Therefore, in order to convert shrinker_rwsem to shrinker_mutex later, here we change to hold the write lock of shrinker_rwsem to reparent. Signed-off-by: Qi Zheng --- mm/shrinker.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/shrinker.c b/mm/shrinker.c index fee6f62904fb..a12dede5d21f 100644 --- a/mm/shrinker.c +++ b/mm/shrinker.c @@ -299,7 +299,7 @@ void reparent_shrinker_deferred(struct mem_cgroup *memcg) parent = root_mem_cgroup; /* Prevent from concurrent shrinker_info expand */ - down_read(&shrinker_rwsem); + down_write(&shrinker_rwsem); for_each_node(nid) { child_info = shrinker_info_protected(memcg, nid); parent_info = shrinker_info_protected(parent, nid); @@ -312,7 +312,7 @@ void reparent_shrinker_deferred(struct mem_cgroup *memcg) } } } - up_read(&shrinker_rwsem); + up_write(&shrinker_rwsem); } #else static int shrinker_memcg_alloc(struct shrinker *shrinker) From patchwork Thu Jul 27 08:05:02 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329707 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7087517AB9 for ; Thu, 27 Jul 2023 08:30:30 +0000 (UTC) Received: from mail-qk1-x72f.google.com (mail-qk1-x72f.google.com [IPv6:2607:f8b0:4864:20::72f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 07108A24F for ; Thu, 27 Jul 2023 01:30:26 -0700 (PDT) Received: by mail-qk1-x72f.google.com with SMTP id af79cd13be357-76c7134b308so3553285a.0 for ; Thu, 27 Jul 2023 01:30:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690446626; x=1691051426; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=V+VUr/yqCBhRzWtIhjCO81y0MQsQ8/nBil0vz0xF6BE=; b=elMOqzQ+u9YnRxYYQLJp0ELVRKovs85Wf5iLQ9n6NDT0fdihQYzfGvSXkB4yXrRPuW 5iTWgSCzc+T/5C6FBmDyBzYmiQ42WTBZiJ+3oaZvPEoJXhcje2HlNpPOtPB4jfa1Heil G/zK0wtLCiqc+3DHvXyH37ILLNQMojsOHho0WtLLmzpBO3XJh81ZgXid4sy7jTsyR5Bg z/wN4vDZX1qWst+5ONoXai92VB9/k93prlQj2fixUDcV+rpu6qv8jraX5ziaKaMXKrzL r/234SaiKgZkw7g5BIxHA+iyogHxWyXxpRWYVi34V81hv+7yWtfhtOAHdO2obmUbrN4Z bbbw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690446626; x=1691051426; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=V+VUr/yqCBhRzWtIhjCO81y0MQsQ8/nBil0vz0xF6BE=; b=Fawa2sXCZnEW0McG/SpiqEQfWARa8G5XnSD/MDeYStUleM40pxkj1SIbEC7Zfxqgsw SBbk4ZBSHXNefxuuA3ePU82PeG45BXDfDRb/lz0EnhsYknMiF0hAbgiy6B1+ay9eFbx9 eDi8zoRK1IbJWVlvVyKBuaPpT4h5SIkZitufURfAhOdaC6krZJ0rtBmvJRdTXgzuqFX6 eYv1J+pJe9RE4eMYCSVaYOIGfHrwnwmAA865uLAoUBDTN194dWehyCd3UWH5A7QxzryQ OrLH/qNgTMxkPTEXJZhrD2SPD4G1JuRdrH2RnuAWa2gIJq4HXuPQ+Dl//ZXp/8GhDntZ spaA== X-Gm-Message-State: ABy/qLZGdeATRf75LVrQzYawHLub7jR1zg98HOMex0Wm8LruHvH0KXkm MiOxY4r54N/lxxV0ECamun4KmxGleCsKKlKU8wo= X-Google-Smtp-Source: APBJJlEPnp3RDXXbUxyHg3EG2jnu2Scq2lS38vCuYEIB7nQxuybwzYpkjm+dcqMi61BwYttNjNAkLg== X-Received: by 2002:aa7:84d0:0:b0:686:bf43:60fa with SMTP id x16-20020aa784d0000000b00686bf4360famr5267613pfn.0.1690445746275; Thu, 27 Jul 2023 01:15:46 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.15.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:15:45 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH v3 49/49] mm: shrinker: convert shrinker_rwsem to mutex Date: Thu, 27 Jul 2023 16:05:02 +0800 Message-Id: <20230727080502.77895-50-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230727080502.77895-1-zhengqi.arch@bytedance.com> References: <20230727080502.77895-1-zhengqi.arch@bytedance.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Now there are no readers of shrinker_rwsem, so we can simply replace it with mutex lock. Signed-off-by: Qi Zheng --- drivers/md/dm-cache-metadata.c | 2 +- fs/super.c | 2 +- mm/shrinker.c | 28 ++++++++++++++-------------- mm/shrinker_debug.c | 14 +++++++------- 4 files changed, 23 insertions(+), 23 deletions(-) diff --git a/drivers/md/dm-cache-metadata.c b/drivers/md/dm-cache-metadata.c index acffed750e3e..9e0c69958587 100644 --- a/drivers/md/dm-cache-metadata.c +++ b/drivers/md/dm-cache-metadata.c @@ -1828,7 +1828,7 @@ int dm_cache_metadata_abort(struct dm_cache_metadata *cmd) * Replacement block manager (new_bm) is created and old_bm destroyed outside of * cmd root_lock to avoid ABBA deadlock that would result (due to life-cycle of * shrinker associated with the block manager's bufio client vs cmd root_lock). - * - must take shrinker_rwsem without holding cmd->root_lock + * - must take shrinker_mutex without holding cmd->root_lock */ new_bm = dm_block_manager_create(cmd->bdev, DM_CACHE_METADATA_BLOCK_SIZE << SECTOR_SHIFT, CACHE_MAX_CONCURRENT_LOCKS); diff --git a/fs/super.c b/fs/super.c index 68b3877af941..fdde72e2a357 100644 --- a/fs/super.c +++ b/fs/super.c @@ -54,7 +54,7 @@ static char *sb_writers_name[SB_FREEZE_LEVELS] = { * One thing we have to be careful of with a per-sb shrinker is that we don't * drop the last active reference to the superblock from within the shrinker. * If that happens we could trigger unregistering the shrinker from within the - * shrinker path and that leads to deadlock on the shrinker_rwsem. Hence we + * shrinker path and that leads to deadlock on the shrinker_mutex. Hence we * take a passive reference to the superblock to avoid this from occurring. */ static unsigned long super_cache_scan(struct shrinker *shrink, diff --git a/mm/shrinker.c b/mm/shrinker.c index a12dede5d21f..3d44a335ef3c 100644 --- a/mm/shrinker.c +++ b/mm/shrinker.c @@ -8,7 +8,7 @@ #include "internal.h" LIST_HEAD(shrinker_list); -DECLARE_RWSEM(shrinker_rwsem); +DEFINE_MUTEX(shrinker_mutex); #ifdef CONFIG_MEMCG static int shrinker_nr_max; @@ -80,7 +80,7 @@ int alloc_shrinker_info(struct mem_cgroup *memcg) int nid, ret = 0; int array_size = 0; - down_write(&shrinker_rwsem); + mutex_lock(&shrinker_mutex); array_size = shrinker_unit_size(shrinker_nr_max); for_each_node(nid) { info = kvzalloc_node(sizeof(*info) + array_size, GFP_KERNEL, nid); @@ -91,7 +91,7 @@ int alloc_shrinker_info(struct mem_cgroup *memcg) goto err; rcu_assign_pointer(memcg->nodeinfo[nid]->shrinker_info, info); } - up_write(&shrinker_rwsem); + mutex_unlock(&shrinker_mutex); return ret; @@ -104,7 +104,7 @@ static struct shrinker_info *shrinker_info_protected(struct mem_cgroup *memcg, int nid) { return rcu_dereference_protected(memcg->nodeinfo[nid]->shrinker_info, - lockdep_is_held(&shrinker_rwsem)); + lockdep_is_held(&shrinker_mutex)); } static struct shrinker_info *shrinker_info_rcu(struct mem_cgroup *memcg, @@ -161,7 +161,7 @@ static int expand_shrinker_info(int new_id) if (!root_mem_cgroup) goto out; - lockdep_assert_held(&shrinker_rwsem); + lockdep_assert_held(&shrinker_mutex); new_size = shrinker_unit_size(new_nr_max); old_size = shrinker_unit_size(shrinker_nr_max); @@ -224,7 +224,7 @@ static int shrinker_memcg_alloc(struct shrinker *shrinker) if (mem_cgroup_disabled()) return -ENOSYS; - down_write(&shrinker_rwsem); + mutex_lock(&shrinker_mutex); id = idr_alloc(&shrinker_idr, shrinker, 0, 0, GFP_KERNEL); if (id < 0) goto unlock; @@ -238,7 +238,7 @@ static int shrinker_memcg_alloc(struct shrinker *shrinker) shrinker->id = id; ret = 0; unlock: - up_write(&shrinker_rwsem); + mutex_unlock(&shrinker_mutex); return ret; } @@ -248,7 +248,7 @@ static void shrinker_memcg_remove(struct shrinker *shrinker) BUG_ON(id < 0); - lockdep_assert_held(&shrinker_rwsem); + lockdep_assert_held(&shrinker_mutex); idr_remove(&shrinker_idr, id); } @@ -299,7 +299,7 @@ void reparent_shrinker_deferred(struct mem_cgroup *memcg) parent = root_mem_cgroup; /* Prevent from concurrent shrinker_info expand */ - down_write(&shrinker_rwsem); + mutex_lock(&shrinker_mutex); for_each_node(nid) { child_info = shrinker_info_protected(memcg, nid); parent_info = shrinker_info_protected(parent, nid); @@ -312,7 +312,7 @@ void reparent_shrinker_deferred(struct mem_cgroup *memcg) } } } - up_write(&shrinker_rwsem); + mutex_unlock(&shrinker_mutex); } #else static int shrinker_memcg_alloc(struct shrinker *shrinker) @@ -708,11 +708,11 @@ void shrinker_register(struct shrinker *shrinker) return; } - down_write(&shrinker_rwsem); + mutex_lock(&shrinker_mutex); list_add_tail_rcu(&shrinker->list, &shrinker_list); shrinker->flags |= SHRINKER_REGISTERED; shrinker_debugfs_add(shrinker); - up_write(&shrinker_rwsem); + mutex_unlock(&shrinker_mutex); init_completion(&shrinker->done); /* @@ -745,7 +745,7 @@ void shrinker_free(struct shrinker *shrinker) wait_for_completion(&shrinker->done); } - down_write(&shrinker_rwsem); + mutex_lock(&shrinker_mutex); if (shrinker->flags & SHRINKER_REGISTERED) { /* * Lookups on the shrinker are over and will fail in the future, @@ -760,7 +760,7 @@ void shrinker_free(struct shrinker *shrinker) if (shrinker->flags & SHRINKER_MEMCG_AWARE) shrinker_memcg_remove(shrinker); - up_write(&shrinker_rwsem); + mutex_unlock(&shrinker_mutex); if (debugfs_entry) shrinker_debugfs_remove(debugfs_entry, debugfs_id); diff --git a/mm/shrinker_debug.c b/mm/shrinker_debug.c index 506257585408..368fa0484a44 100644 --- a/mm/shrinker_debug.c +++ b/mm/shrinker_debug.c @@ -7,7 +7,7 @@ #include /* defined in vmscan.c */ -extern struct rw_semaphore shrinker_rwsem; +extern struct mutex shrinker_mutex; extern struct list_head shrinker_list; static DEFINE_IDA(shrinker_debugfs_ida); @@ -163,7 +163,7 @@ int shrinker_debugfs_add(struct shrinker *shrinker) char buf[128]; int id; - lockdep_assert_held(&shrinker_rwsem); + lockdep_assert_held(&shrinker_mutex); /* debugfs isn't initialized yet, add debugfs entries later. */ if (!shrinker_debugfs_root) @@ -220,7 +220,7 @@ int shrinker_debugfs_rename(struct shrinker *shrinker, const char *fmt, ...) if (!new) return -ENOMEM; - down_write(&shrinker_rwsem); + mutex_lock(&shrinker_mutex); old = shrinker->name; shrinker->name = new; @@ -238,7 +238,7 @@ int shrinker_debugfs_rename(struct shrinker *shrinker, const char *fmt, ...) shrinker->debugfs_entry = entry; } - up_write(&shrinker_rwsem); + mutex_unlock(&shrinker_mutex); kfree_const(old); @@ -251,7 +251,7 @@ struct dentry *shrinker_debugfs_detach(struct shrinker *shrinker, { struct dentry *entry = shrinker->debugfs_entry; - lockdep_assert_held(&shrinker_rwsem); + lockdep_assert_held(&shrinker_mutex); shrinker_debugfs_name_free(shrinker); @@ -279,14 +279,14 @@ static int __init shrinker_debugfs_init(void) shrinker_debugfs_root = dentry; /* Create debugfs entries for shrinkers registered at boot */ - down_write(&shrinker_rwsem); + mutex_lock(&shrinker_mutex); list_for_each_entry(shrinker, &shrinker_list, list) if (!shrinker->debugfs_entry) { ret = shrinker_debugfs_add(shrinker); if (ret) break; } - up_write(&shrinker_rwsem); + mutex_unlock(&shrinker_mutex); return ret; }