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: 13329640 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5AF04C41513 for ; Thu, 27 Jul 2023 08:25:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230455AbjG0IZA (ORCPT ); Thu, 27 Jul 2023 04:25:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55952 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233844AbjG0IW6 (ORCPT ); Thu, 27 Jul 2023 04:22:58 -0400 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 DC7AE449C for ; Thu, 27 Jul 2023 01:13:33 -0700 (PDT) Received: by mail-pf1-x42f.google.com with SMTP id d2e1a72fcca58-682eef7d752so204771b3a.0 for ; Thu, 27 Jul 2023 01:13:33 -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=H1sjt8b4DrvP5TH0yeopc23NgH/XtYfixRiO18QQMR9WDr6lUi1Yrpz3z8LQk6OEmh bi7ZebDQutturoUeg8IZHxvr/iRMZJgFVwmU/lV02Yi9GTjX08gc4oXHIPLcfKHkU746 SARzDR0Gm70FYs7lMDKW0IX52MlX2f5VpY7NXlKsQ2bdaUxOzr07TYgsyajjNa9g5rD3 GrGQ1Qd4OFXjhmsErl1Imu/2zBGNeRsd7NdQMCIltUq13mfYKY+TjVyvMSmDp2jut4A9 fUaxmGWqt+uHDfcjpPS8DHpPGiMO4OjE3vAnIHNmVFChIrBEKSIC/YuTgfqnTIiu/7G9 zvTw== X-Gm-Message-State: ABy/qLZhLxRIrAy93s1UW0sScLMJoBerm559vRqjmVyf9WG4WHwgOQSM 0UBRBD0lHbgQ3zUS6De5qQ3LAg== 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> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: rcu@vger.kernel.org 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); } /*