From patchwork Thu Jul 27 08:04:51 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13329644 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 61D03C41513 for ; Thu, 27 Jul 2023 08:27:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231531AbjG0I1c (ORCPT ); Thu, 27 Jul 2023 04:27:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34316 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234034AbjG0I0s (ORCPT ); Thu, 27 Jul 2023 04:26:48 -0400 Received: from mail-pf1-x436.google.com (mail-pf1-x436.google.com [IPv6:2607:f8b0:4864:20::436]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1FBBC5586 for ; Thu, 27 Jul 2023 01:14:20 -0700 (PDT) Received: by mail-pf1-x436.google.com with SMTP id d2e1a72fcca58-66d6a9851f3so168715b3a.0 for ; Thu, 27 Jul 2023 01:14:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1690445613; x=1691050413; 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=jaqVlo27zysQOw4inLaa7RWYi61naAqQm5GJ5upJpN4=; b=AiXoaCJQdjYD9eYmeEdrfJ7ezATe9Yx6/bwBgW+5G+EPOMCuXYwEAcwi/JFENHTjN3 RLofwFvJd4EkqfH7Ye6KmIjKXgnfjEMN6IQZZPzERz8d2kaa1LDxbOfy1pXfbOXi//fW yPmgpOzP5ISM/DRd0jetvScx//7ssTCBUe2enciakCKenXGhXZrdb9q6vjgbH3ZMQFpH R1cJwZwEOETjjGMipjwgI0l9uWlKWu8vb1MB9swWpnARqP7hyemEh7msGfN9mYd5xYpI D03dkm0FvaoEJlj9bRrg4eXRdtCSaQUY5I5xaJER5wRv+adUsRWUp3ZNy7xFaIahEhPe Q+Lw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690445613; x=1691050413; 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=jaqVlo27zysQOw4inLaa7RWYi61naAqQm5GJ5upJpN4=; b=Sqh0LQ2Y43HIt1DSd3PFVo4VsOiTWjbrmaTG6ITDpXFpwE/klWDeV/u7/YTH7I6iJU XuhB5P+ToRzSk7IllULa1+jf8vzXWnImGTVwDW8oI2zkB6Gw5n4YEPv+J+r+gfCGWZd9 LNlhR+yUFynN4fqueZojkMCPwf1kggGNhOYM6k/3yl9i8PGP2IYBn1c7z7f3dnkzhr2s Rz5EzzYS6Bu4+M+OHrwbWUo0zPldSIYwQdkQj3u38s7Oc9fmloHA151nc7EqD7ovgcNv ypxjkfBvmCrie/jcz0EUvWDVTGvH6/5fLQCoP6Rvw+4sB+XoUhKNxruZwy5IwYI0VvfU tRTQ== X-Gm-Message-State: ABy/qLZWFrSMuk1c5a1tNE5nhqqvVJkVszN3YjQc7ZLmpepRfu7Zn5OI rPeLd66XTYZbtLcfKzH6cdNf2g== X-Google-Smtp-Source: APBJJlG+tRTw+eNG8sDYXmQBYWrWDa50m7E6kRjtDYwVrWUQOS5ovTAWRl9t0zD5rxSD0dIJ86GpuQ== X-Received: by 2002:a05:6a00:2d82:b0:675:8627:a291 with SMTP id fb2-20020a056a002d8200b006758627a291mr4587660pfb.3.1690445613284; Thu, 27 Jul 2023 01:13:33 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.147]) by smtp.gmail.com with ESMTPSA id j8-20020aa78d08000000b006828e49c04csm885872pfe.75.2023.07.27.01.13.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 01:13:32 -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 38/49] xfs: dynamically allocate the xfs-buf shrinker Date: Thu, 27 Jul 2023 16:04:51 +0800 Message-Id: <20230727080502.77895-39-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 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..715730fc91cb 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_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); @@ -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;