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: 13324157 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 5B765C001B0 for ; Mon, 24 Jul 2023 10:05:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233133AbjGXKFN (ORCPT ); Mon, 24 Jul 2023 06:05:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36762 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233130AbjGXKEr (ORCPT ); Mon, 24 Jul 2023 06:04:47 -0400 Received: from mail-pl1-f182.google.com (mail-pl1-f182.google.com [209.85.214.182]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1241F5FC3 for ; Mon, 24 Jul 2023 02:57:22 -0700 (PDT) Received: by mail-pl1-f182.google.com with SMTP id d9443c01a7336-1b8c364ad3bso8863985ad.1 for ; Mon, 24 Jul 2023 02:57:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690192290; x=1690797090; 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=hOD9KvuIa/sVR/XUeit3UEUy4lAv7qisrKP+dY73zqCVNh5USDs3UmvxT9Mu0HPAd/ sQoZTlZIhyjE9hP5yaJCN279yVD9q+u+zszBd3e/RRrSWK4lH9Sj6N23h1hoy3tnMHt9 Prw78GIFByR0J3YK+swLHgojCOBGOspVkhguuywNaBo2olaDrD94vFbNjxafvVNqL5jj kb7wPt4FuUX1Yqc+w6X3ILlcOhkKLx335rMW5M/f76lMo6KZSankQneuXGq4M4YDo1Pw 4QB0FQMF4kEeIJcpti49nOtrs1POFPvCGoLSeyUrx9gHxzPZXlLq/CHz3lcRP0C+66Sl YJZg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690192290; x=1690797090; 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=D2m9lbB+ZJR9zlEbYSaJhaVAI6SGBHuyOoYv1TIpW6IMHNQ5kdZh5n9ursFnneipSu 4GiSH+Vtpw3XfyoOlJH9nSxBEHzeGsTQFtWS8PAomtiImcvGMtlNQOU//ZeKrDPVo6kA c0sNKH2Rjuy67xJ95WB7Z6OWSz/Bm9EYwxtg4LAfCckq2w28rn/+QUvQgV/KldjL80Fc 9w1vGqNqhRvLtfSnme6wN3JIgOW/aK4as2xWuc5QrAdmjvhCSSghCfW4//E7nCWG0ZqU cE7frsYrQnHSll02U/KvqzAY6Ho6J+UfIe4dJNf0XbVIFq8fUYCFfs+cY7PlRi4T/lls NfHw== X-Gm-Message-State: ABy/qLY5jp2SpXqKBputq+LrSyVezlhG/J378c+edzzEogHhAnJ6KGvE 4SxIUNj4cjcNYetCLfxl1K8ikg== 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) 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 v2 32/47] ext4: dynamically allocate the ext4-es shrinker 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 Precedence: bulk List-ID: X-Mailing-List: kvm@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 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); } /*