From patchwork Mon Sep 11 09:44:33 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13379962 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 1E33DCA0EC4 for ; Mon, 11 Sep 2023 21:29:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345568AbjIKVVS (ORCPT ); Mon, 11 Sep 2023 17:21:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50102 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236093AbjIKJus (ORCPT ); Mon, 11 Sep 2023 05:50:48 -0400 Received: from mail-pl1-x62b.google.com (mail-pl1-x62b.google.com [IPv6:2607:f8b0:4864:20::62b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0D023ED for ; Mon, 11 Sep 2023 02:50:21 -0700 (PDT) Received: by mail-pl1-x62b.google.com with SMTP id d9443c01a7336-1c39500767aso6236875ad.0 for ; Mon, 11 Sep 2023 02:50:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1694425820; x=1695030620; darn=vger.kernel.org; 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=89uHTpJcIxLZo7abv8HLEcqu89E7sxjnosGqTuxXflE=; b=hIHD0F8GO3yyHZO8YOa8ZRpyhOG3Y5eVMeDgFHBjo7pBPAxZApxCLrT5UfjzkMSXQ5 s/W6x43VNIJ0S1XtyToZxbPNk3AvZTow69XR69vzMnbNQVT1Z/cVsiaQojftOQhDf4q0 xpFLNBpNVqM+4+RvlBoprTYj9+HEOf7JoLBE2+UFSELQZl1h7BITxC/ivzCTgLl2xrir C9MrPqTuAZdxOzbWcVUc4Q3J3eGrtk8w2Vo+cuyMgJWl3W8Cqe9lOgZRO7SIebfrwU3U a6OKSeIp+Fnv7RxNG6FOK36XWBCDVDL3N5SjE3aEgte8K7B1CLoYUnG5krA4jKFT0FUS XZ3w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1694425820; x=1695030620; 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=89uHTpJcIxLZo7abv8HLEcqu89E7sxjnosGqTuxXflE=; b=syl/PPDituT2nymcjvXEgOAcnJ7d4FDqDZ7WZCvsV1pTntKki4V8oDitFBVsI+pRuE zX2o1d286GKj9ceGkjwPaUA4XkvfO7LkpR4MS8CFRsS4tCAqAs+m8igd1Je8nom4jtQ1 2nzYkxx1zDNJ2fws/Q6l48gvw6TGdf+s6tpsA4jHtwwH/u4zjLE/D3RjzlUEdbQxt4D4 7QEB+g62vAqU/TAsFZwAEyLI2LVMMM+iyxS/TdRxK6hYGIjHZnEm/sBBezAbBLBVzbab SSfgOKWT+8pHIbJjQGAkWncOpwshI+fvll54IECCC1B2KgExMuBTKxM2vGO/pu5Gb/tN UZrg== X-Gm-Message-State: AOJu0Yx2IEk4Dlsq/3eIHz23BZDVOuLTk5EP90MOox3co+FRMyLn7g/H TjDyn9jEz+Wm7PdITRZ1u0voog== X-Google-Smtp-Source: AGHT+IEvj565qWnkofccC8hLFXJuQMn8WbyJUnUdIWHGtU6d/4Mn9yJ5j8IFsYM+kWtEVXfSyuocaw== X-Received: by 2002:a17:902:e5c7:b0:1c1:fc5c:b34a with SMTP id u7-20020a170902e5c700b001c1fc5cb34amr10661836plf.3.1694425820591; Mon, 11 Sep 2023 02:50:20 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id az7-20020a170902a58700b001bdc2fdcf7esm5988188plb.129.2023.09.11.02.50.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 11 Sep 2023 02:50:20 -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, linux-fsdevel@vger.kernel.org, Qi Zheng , Muchun Song , Chandan Babu R , linux-xfs@vger.kernel.org Subject: [PATCH v6 34/45] xfs: dynamically allocate the xfs-buf shrinker Date: Mon, 11 Sep 2023 17:44:33 +0800 Message-Id: <20230911094444.68966-35-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230911094444.68966-1-zhengqi.arch@bytedance.com> References: <20230911094444.68966-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-xfs@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 via 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 CC: Chandan Babu R CC: "Darrick J. Wong" CC: linux-xfs@vger.kernel.org --- fs/xfs/xfs_buf.c | 24 +++++++++++++----------- fs/xfs/xfs_buf.h | 2 +- 2 files changed, 14 insertions(+), 12 deletions(-) diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c index c1ece4a08ff4..9e7ba04572db 100644 --- a/fs/xfs/xfs_buf.c +++ b/fs/xfs/xfs_buf.c @@ -1913,8 +1913,7 @@ 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; @@ -1936,8 +1935,7 @@ 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); } @@ -1947,7 +1945,7 @@ xfs_free_buftarg( { struct block_device *bdev = btp->bt_bdev; - 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); @@ -2031,13 +2029,17 @@ 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->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 df8f47953bb4..702e7d9ea2ac 100644 --- a/fs/xfs/xfs_buf.h +++ b/fs/xfs/xfs_buf.h @@ -108,7 +108,7 @@ 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;