From patchwork Thu Jun 22 08:53:15 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 111527 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:994d:0:b0:3d9:f83d:47d9 with SMTP id k13csp4928629vqr; Thu, 22 Jun 2023 02:12:22 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ4OV5ZV3xHx6QODp8k+GXnfJHDLpq+yWF540rdDHc9dtHThk7WBCjmNTl0FkgxaNJyH1Aep X-Received: by 2002:a05:6808:ddf:b0:3a0:3f15:1aca with SMTP id g31-20020a0568080ddf00b003a03f151acamr6485833oic.55.1687425141917; Thu, 22 Jun 2023 02:12:21 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1687425141; cv=none; d=google.com; s=arc-20160816; b=NAxKV9jiwh4iKxMmQWKzOIiZIqBrnW3x+H34RI5zARszHVXuSVIZXPimEf84Hpysez qB59RQxPUJmbypx5AKEzocaQhew8LWsh4pRvk9dyIvo9LzzgYy4hWuX0+4+/QzEw0vN8 qDWzaAoWJPPhKit+LB97bar8czMybjmuGTBLyE5ATOGQdRVixA354zU3VprfcbkGNn04 UExhnhb3z4/iOc7Xxh/lshg+FRS20LGtfz4BAVTLygyhcn07wJm+avc6Nw9a2xFKr9xw axQXpPd9hGEhw/tMzwdf+9/JMQCfjsBvkspB3bSQiYABvtCNYWxkAM15oRSrM0VBQtND qH7Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=9Gb8UpD3lZt4bh5cbhFKOyQevww2sfofkVlmbPNwxg8=; b=KY7P9vptU1auxu5MWG/QgcjYHh/6KC/miaZC/Cb41kKS+n2aatTvQnBfkM2wF+DcXX m6RX028rXc/5idr8wh7PeVpTkFm1c9PVX9xytPqtVFdw5TJwH64n/yuYcLO6P4bvZNN9 B65vVCX0DY2sBUiCwgHc3f02V8EBrRX97Py0N51v4X8a8VOvyX65rZJTQMcFWWST+tyx wRzxH7dGZEMWmuYqUmMoV0mPoVmkYNfEIW3YYQCOPcFHb1daeHt7+ENGeD4W/H8M3Wx7 Dmtabc3HZdilLSYVNfcJbuLc8Yf8oXBt/YElQzAjVNdB1PN3ZaZyjwHW0MPRwnrhVmJJ Z9Eg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@bytedance.com header.s=google header.b=D5LVC+4H; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=bytedance.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id l21-20020a637015000000b00533ffeaca3dsi6095863pgc.40.2023.06.22.02.12.08; Thu, 22 Jun 2023 02:12:21 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@bytedance.com header.s=google header.b=D5LVC+4H; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=bytedance.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229776AbjFVI5t (ORCPT + 99 others); Thu, 22 Jun 2023 04:57:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38938 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231616AbjFVIzx (ORCPT ); Thu, 22 Jun 2023 04:55:53 -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 5ECD32695 for ; Thu, 22 Jun 2023 01:55:15 -0700 (PDT) Received: by mail-pl1-x62b.google.com with SMTP id d9443c01a7336-1b693afe799so2464575ad.1 for ; Thu, 22 Jun 2023 01:55:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1687424115; x=1690016115; 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=9Gb8UpD3lZt4bh5cbhFKOyQevww2sfofkVlmbPNwxg8=; b=D5LVC+4HokJCz4FPeXcY+dsaTssife3Qqo2QFad+aTpXncu7uEYIb5Esgo0X9193yq JD9ShpMbmoNV55hSp3a3PNB6eqKE4aEEgjXjfXMhn0CWCq43W/gk5ji4OA6QFiz5YEbm Of780eCZQIl3oU3nzqHMjitXTfpqsvwkQAoJ3/aSYN48pFnlXdDicr+5TJONhzqSsJ8t IgcwK0tiB9rdlMicFxhfFEkVC1N5FWb0hV5n3c+iSTxmBlXa0ZlHHEAwcq0BLcrHgmll f7y7d2fR0/LzWuGi/rCVXp+lACayEzs+7pdEprt9XcBuFLw9Vycb7reaOybOjmFS0TWh I1Bg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1687424115; x=1690016115; 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=9Gb8UpD3lZt4bh5cbhFKOyQevww2sfofkVlmbPNwxg8=; b=ekhgaYAEOCU4O4QfidUeDDHDPmP/Uio0fWc1ZajjruJoUbtHU+Pjhj1Z1/dkYLnQV8 0aqHS0ijyzSndDiSigp53IAubYBCQ6aQICbu4hBZKrJJ+aggHtajFWVRWsUBtWeGbgKd ihR4ax0BxNZdkvhr68Zzomh/O3r3kpNs8NQtLEKO6/6LXi94luxdwJ1z9jaub/ohhujx y50KngFOWzVIIw38i579Xr6JwMLCZD1GKbRMX/ghYYpAviIf5EeS4xhy3MGGdlAPi3gd spXNjx4+120AvOUc5OmFfEg0/mi53he723Pi5Ci0GAGwqbkGXlZUTqPbrvAShN6mktd2 ToAQ== X-Gm-Message-State: AC+VfDzTDdKD4IHGR9ymQfcakZIL9Pes0zVS6QKyxss5IAJweVS2Hx+K ooHUNC03X1Mj/4TdLkE55bLBhg== X-Received: by 2002:a17:903:2451:b0:1b0:34c6:3bf2 with SMTP id l17-20020a170903245100b001b034c63bf2mr21539426pls.5.1687424114850; Thu, 22 Jun 2023 01:55:14 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([139.177.225.254]) by smtp.gmail.com with ESMTPSA id h2-20020a170902f7c200b001b549fce345sm4806971plw.230.2023.06.22.01.55.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 22 Jun 2023 01:55:14 -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 Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, intel-gfx@lists.freedesktop.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-nfs@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH 09/29] bcache: dynamically allocate the md-bcache shrinker Date: Thu, 22 Jun 2023 16:53:15 +0800 Message-Id: <20230622085335.77010-10-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230622085335.77010-1-zhengqi.arch@bytedance.com> References: <20230622085335.77010-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1769393505510422853?= X-GMAIL-MSGID: =?utf-8?q?1769393505510422853?= In preparation for implementing lockless slab shrink, we need to dynamically allocate the md-bcache 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 cache_set. Signed-off-by: Qi Zheng --- drivers/md/bcache/bcache.h | 2 +- drivers/md/bcache/btree.c | 23 ++++++++++++++--------- drivers/md/bcache/sysfs.c | 2 +- 3 files changed, 16 insertions(+), 11 deletions(-) diff --git a/drivers/md/bcache/bcache.h b/drivers/md/bcache/bcache.h index 700dc5588d5f..53c73b372e7a 100644 --- a/drivers/md/bcache/bcache.h +++ b/drivers/md/bcache/bcache.h @@ -541,7 +541,7 @@ struct cache_set { struct bio_set bio_split; /* For the btree cache */ - struct shrinker shrink; + struct shrinker *shrink; /* For the btree cache and anything allocation related */ struct mutex bucket_lock; diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c index 569f48958bde..1131ae91f62a 100644 --- a/drivers/md/bcache/btree.c +++ b/drivers/md/bcache/btree.c @@ -667,7 +667,7 @@ static int mca_reap(struct btree *b, unsigned int min_order, bool flush) static unsigned long bch_mca_scan(struct shrinker *shrink, struct shrink_control *sc) { - struct cache_set *c = container_of(shrink, struct cache_set, shrink); + struct cache_set *c = shrink->private_data; struct btree *b, *t; unsigned long i, nr = sc->nr_to_scan; unsigned long freed = 0; @@ -734,7 +734,7 @@ static unsigned long bch_mca_scan(struct shrinker *shrink, static unsigned long bch_mca_count(struct shrinker *shrink, struct shrink_control *sc) { - struct cache_set *c = container_of(shrink, struct cache_set, shrink); + struct cache_set *c = shrink->private_data; if (c->shrinker_disabled) return 0; @@ -752,8 +752,8 @@ void bch_btree_cache_free(struct cache_set *c) closure_init_stack(&cl); - if (c->shrink.list.next) - unregister_shrinker(&c->shrink); + if (c->shrink->list.next) + unregister_and_free_shrinker(c->shrink); mutex_lock(&c->bucket_lock); @@ -828,14 +828,19 @@ int bch_btree_cache_alloc(struct cache_set *c) c->verify_data = NULL; #endif - c->shrink.count_objects = bch_mca_count; - c->shrink.scan_objects = bch_mca_scan; - c->shrink.seeks = 4; - c->shrink.batch = c->btree_pages * 2; + c->shrink = shrinker_alloc_and_init(bch_mca_count, bch_mca_scan, + c->btree_pages * 2, 4, 0, c); + if (!c->shrink) { + pr_warn("bcache: %s: could not allocate shrinker\n", + __func__); + return -ENOMEM; + } - if (register_shrinker(&c->shrink, "md-bcache:%pU", c->set_uuid)) + if (register_shrinker(c->shrink, "md-bcache:%pU", c->set_uuid)) { pr_warn("bcache: %s: could not register shrinker\n", __func__); + shrinker_free(c->shrink); + } return 0; } diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c index c6f677059214..771577581f52 100644 --- a/drivers/md/bcache/sysfs.c +++ b/drivers/md/bcache/sysfs.c @@ -866,7 +866,7 @@ STORE(__bch_cache_set) sc.gfp_mask = GFP_KERNEL; sc.nr_to_scan = strtoul_or_return(buf); - c->shrink.scan_objects(&c->shrink, &sc); + c->shrink->scan_objects(c->shrink, &sc); } sysfs_strtoul_clamp(congested_read_threshold_us,