From patchwork Mon Jul 24 09:43:43 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13324098 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 14B3DC001B0 for ; Mon, 24 Jul 2023 09:59:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232445AbjGXJ73 (ORCPT ); Mon, 24 Jul 2023 05:59:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58494 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232619AbjGXJ64 (ORCPT ); Mon, 24 Jul 2023 05:58:56 -0400 Received: from mail-pl1-x635.google.com (mail-pl1-x635.google.com [IPv6:2607:f8b0:4864:20::635]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 754E746A6 for ; Mon, 24 Jul 2023 02:53:22 -0700 (PDT) Received: by mail-pl1-x635.google.com with SMTP id d9443c01a7336-1bb85ed352bso2244945ad.0 for ; Mon, 24 Jul 2023 02:53:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690192338; x=1690797138; 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=TdB9rRMLZCcd9e2nqCLYXDwhc2GYqBzgLTOCktFYsxc=; b=SzORXV42/Rkrz0ySbtFMuCZ6EcMdlaXWidsXVoP9Bu4SkfHmgah3BXDWmdOJP2Jiax xVX2Gq7sqO/lSpvZDt7FPW8ckXc5rBx+Fp5rDETVHg5ZRmLyKjmjXPxU8j82DsT8nUX2 +lBD1pmTVNRo9p32tv/6gOZ/Sm5LO6qba/fn4oF55QYMtV6ZQw4pMeuXt6qQbAj1PWKP V84//RahuYbQGXKjJ1xGWfF0qil0oc/qVmx4ZoBZqcIV2GTe+3GnYm52uVamfvVOgPBe 7qmhYlAe5+lFDhiCToVYO6NYEZfnOgPlX7bqwkW4eIRa2R40yUO4E7ouwBizzc4Majgp WMAQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690192338; x=1690797138; 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=TdB9rRMLZCcd9e2nqCLYXDwhc2GYqBzgLTOCktFYsxc=; b=gH6WFpoimlVQNFOste17z7TvuXBJmWKv92cgUdH9TxHLt1kH5BrgfOybo/AzLKLOjW CfXDqX2bXhsE5IuJ5/G0nCTFWP7Kudlq0QYCjyfFlR7WfxdVd7KgoKXNeZL8pCJN2i3t /QhlNfeHUiRtQrnLmzCGSsDsT6tNKZDeUI035vb+xbJcHEOE80WCJRm76vX5sK5uCs61 bCn8vXOTw8Iw3YYPks6fxeLL+50jrTYopuvoLv3C4vQFSkURHIJmsioj6l48nIu7Dh6B jIPL+LkCbSmx0qCsut08/OaIKquaxC0k3CzdJ8GlremLFlQ4arQwHk/jsslDZkDD+Gk8 udWA== X-Gm-Message-State: ABy/qLbyHD1GNLEYzY6qO+rTAaM8J95vfsZERN8B5QrC/kZqvWDCBRkf xAPOHH/q2E12syLXIXfCGUXegQ== X-Google-Smtp-Source: APBJJlGv61W8KGqFtJwXjT0bM91VjHnubPgHDdaymusYtIYliDl3QXXildbsEKZFPobYebqub0cGDA== X-Received: by 2002:a17:902:f681:b0:1b8:17e8:5472 with SMTP id l1-20020a170902f68100b001b817e85472mr12096259plg.1.1690192338295; Mon, 24 Jul 2023 02:52:18 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id d5-20020a170902c18500b001bb20380bf2sm8467233pld.13.2023.07.24.02.52.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 24 Jul 2023 02:52:17 -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 Subject: [PATCH v2 36/47] xfs: dynamically allocate the xfs-buf shrinker Date: Mon, 24 Jul 2023 17:43:43 +0800 Message-Id: <20230724094354.90817-37-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 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..19a0bf6ce115 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_unregister(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;