From patchwork Mon Jul 24 09:43:39 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13324231 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id EC26BC001E0 for ; Mon, 24 Jul 2023 10:15:18 +0000 (UTC) Received: from [127.0.0.1] (helo=sfs-ml-3.v29.lw.sourceforge.com) by sfs-ml-3.v29.lw.sourceforge.com with esmtp (Exim 4.95) (envelope-from ) id 1qNsb0-0000rQ-I9; Mon, 24 Jul 2023 10:15:18 +0000 Received: from [172.30.20.202] (helo=mx.sourceforge.net) by sfs-ml-3.v29.lw.sourceforge.com with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1qNsaz-0000qy-3D for linux-f2fs-devel@lists.sourceforge.net; Mon, 24 Jul 2023 10:15:17 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sourceforge.net; s=x; h=Content-Transfer-Encoding:MIME-Version:References: In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=oXR+qbQ7FZSOf8H8/XKWyl6GGcPr2+dTjVkbZb7uW4E=; b=KfgYaQSE2w+2OBU5KgNxykg/L5 jl+ANuH6JpOA6ihDFXM7lBoke8/9cJbadBdJ/qH8f3/hPMAZ3eYRUrqGpN6oOD12XvTKjI4rwbLJg LMEEUBPNKTEcsXHxOqjk2nz+7TCImmwmyXi0kpCb0ehexAkIf7bBeiGQBtzRxi1GRpug=; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sf.net; s=x ; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=oXR+qbQ7FZSOf8H8/XKWyl6GGcPr2+dTjVkbZb7uW4E=; b=DAYnVZibcFMk1t0ZdfIEeLS8br K3egL3PE7y+50awT5nngX3FDFBZ4e8YCBcv2q0ouYhPKQq2pGibCrmaP5ecZ7q2wLqCQKDFTqr4pW rxMxchmYYQrSr0Z8j4erRvzqSAWhWhnE3uO5B1pudK3Qdd+87tAYPQrpIbtZs0vT4Y7E=; Received: from mail-qv1-f41.google.com ([209.85.219.41]) by sfi-mx-2.v28.lw.sourceforge.com with esmtps (TLS1.2:ECDHE-RSA-AES128-GCM-SHA256:128) (Exim 4.95) id 1qNsas-0004md-TA for linux-f2fs-devel@lists.sourceforge.net; Mon, 24 Jul 2023 10:15:14 +0000 Received: by mail-qv1-f41.google.com with SMTP id 6a1803df08f44-62fe3f0905aso6911786d6.0 for ; Mon, 24 Jul 2023 03:15:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690193705; x=1690798505; 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=oXR+qbQ7FZSOf8H8/XKWyl6GGcPr2+dTjVkbZb7uW4E=; b=U0nzhM1HOyRJlvMdX+5cUTF7cnwK/bPq9FGVlTLsyOJUzun8Hv/e5t7o3kyj/uWv5U /T8mJ/UN/ApeICuRsJX0tpfR2IgVneGKlHYe85AoBE+OEc1ijSh8BuPS6EXL029qvkwR e9RXOx/aN6bm15otZ2k4IzIZs35bbC+kRDdQunQ/RJakrlF6xKJLYVshtJEh4K1Ml5j2 BzVLjap0HmbzJ19Yh1astzsme+mpO0Eoltgwnf3lMU3u2OroW3c25bThUDAxdWQLhE/e Jv9N3bfXCE4Glbivugq3+cEaI8ikDiUkGHEQKe2oqBRE1SGQgXAyMZjv8y9TKb1MPNVK 8YgA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690193705; x=1690798505; 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=oXR+qbQ7FZSOf8H8/XKWyl6GGcPr2+dTjVkbZb7uW4E=; b=Hn7EPzfr6jcgBlQBt9huAxz89Ak6orlhY4cKUEX/y6hx8Ukr7rtzj+CRkpK/axCbGs uvq7tfvfhB4Q5H5lpYuVMLcFm4gxk/jo6RrdEwYR5ej+PLcogSUNJQ3oRYfTBnsgdtSy xdZ73JRicqgNrbmZL1LzAfhteC5DK/hX2IMkNFFvzTs6EdWPQgZxpaYYKNAF4Y85duKc 1GVUTCTcKX0lHg1psOHlNP+mEv1qYbud9MRgXGB8dp02Hj8l4Yy3ajNTRUuVsaOQhurA QhvlUgFOZXHzK+2074yQej7ODFbQ8p6a2ko7gp5jnjgiam1/fE6KNtjTrjbjKI1bQ3dy Oq8g== X-Gm-Message-State: ABy/qLYmQiKXO4PTWwnzv3fP5H9swT3UnriMOO1EfoVRW4ZRqSnfTUmW gTkPy5IaB3vYXvkAM2131bjp2Bcn6QdUp5wB3NI= X-Google-Smtp-Source: APBJJlFC05XpXuobjW4LsGQFjmg3Q9TZDeGvX5MkKK/m+2sDEjZkN7MidhVsDpGMtrBJxCeRn4k3XA== X-Received: by 2002:a17:903:22ce:b0:1b8:2ba0:c9a8 with SMTP id y14-20020a17090322ce00b001b82ba0c9a8mr12484346plg.2.1690192289977; Mon, 24 Jul 2023 02:51:29 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id d5-20020a170902c18500b001bb20380bf2sm8467233pld.13.2023.07.24.02.51.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 24 Jul 2023 02:51:29 -0700 (PDT) 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 Date: Mon, 24 Jul 2023 17:43:39 +0800 Message-Id: <20230724094354.90817-33-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230724094354.90817-1-zhengqi.arch@bytedance.com> References: <20230724094354.90817-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 X-Headers-End: 1qNsas-0004md-TA Subject: [f2fs-dev] [PATCH v2 32/47] ext4: dynamically allocate the ext4-es shrinker X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Qi Zheng via Linux-f2fs-devel From: Qi Zheng Reply-To: Qi Zheng Cc: kvm@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org, linux-mm@kvack.org, dm-devel@redhat.com, linux-mtd@lists.infradead.org, x86@kernel.org, cluster-devel@redhat.com, xen-devel@lists.xenproject.org, linux-ext4@vger.kernel.org, linux-arm-msm@vger.kernel.org, rcu@vger.kernel.org, linux-bcache@vger.kernel.org, Qi Zheng , linux-raid@vger.kernel.org, linux-nfs@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-btrfs@vger.kernel.org Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.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 0a2d55faa095..1bd150d454f5 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -1651,7 +1651,7 @@ 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..8d4a959dd32f 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_unregister(sbi->s_es_shrinker); } /*