From patchwork Fri Dec 15 01:39:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Li Nan X-Patchwork-Id: 13493892 Received: from dggsgout11.his.huawei.com (dggsgout11.his.huawei.com [45.249.212.51]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D1144650; Fri, 15 Dec 2023 01:41:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=huaweicloud.com Received: from mail.maildlp.com (unknown [172.19.163.235]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTP id 4SrsPX0QrRz4f3lVV; Fri, 15 Dec 2023 09:41:04 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.112]) by mail.maildlp.com (Postfix) with ESMTP id 16F811A0554; Fri, 15 Dec 2023 09:41:09 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.104.67]) by APP1 (Coremail) with SMTP id cCh0CgD3Rg2yrntlPtG0Dg--.46759S6; Fri, 15 Dec 2023 09:41:08 +0800 (CST) From: linan666@huaweicloud.com To: song@kernel.org, axboe@kernel.dk Cc: linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linan666@huaweicloud.com, yukuai3@huawei.com, yi.zhang@huawei.com, houtao1@huawei.com, yangerkun@huawei.com Subject: [PATCH v2 2/2] md: don't account sync_io if iostats of the disk is disabled Date: Fri, 15 Dec 2023 09:39:31 +0800 Message-Id: <20231215013931.3329455-3-linan666@huaweicloud.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231215013931.3329455-1-linan666@huaweicloud.com> References: <20231215013931.3329455-1-linan666@huaweicloud.com> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-CM-TRANSID: cCh0CgD3Rg2yrntlPtG0Dg--.46759S6 X-Coremail-Antispam: 1UD129KBjvJXoW7KFWxKF4kKr1xuF18try7Jrb_yoW8Gw1fpa ykAFyayryjqrW5u3WUX34Dua4rW3srKFW7ArW3A393ZFy3Jr9xKryrXayqqryDWFyrWFWa va4DGFZ8ua10yr7anT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUmK14x267AKxVWrJVCq3wAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_Jryl82xGYIkIc2 x26xkF7I0E14v26r4j6ryUM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2z4x0 Y4vE2Ix0cI8IcVAFwI0_Ar0_tr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F4UJw A2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oVCq3wAa c4AC62xK8xCEY4vEwIxC4wAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzV Aqx4xG6I80ewAv7VC0I7IYx2IY67AKxVWUJVWUGwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S 6xCaFVCjc4AY6r1j6r4UM4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxw ACI402YVCY1x02628vn2kIc2xKxwAKzVCY07xG64k0F24l42xK82IYc2Ij64vIr41l4I8I 3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxV WUGVWUWwC2zVAF1VAY17CE14v26r1q6r43MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAF wI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF7I0E14v26r4j6F4UMIIF0xvE42xK8VAvwI8IcI k0rVWUJVWUCwCI42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6xkF7I0E14v26r4j 6r4UJbIYCTnIWIevJa73UjIFyTuYvjfU1xhLUUUUU X-CM-SenderInfo: polqt0awwwqx5xdzvxpfor3voofrz/ From: Li Nan If iostats is disabled, disk_stats will not be updated and part_stat_read_accum() only returns a constant value. In this case, continuing to count sync_io and to check is_mddev_idle() is no longer meaningful. Signed-off-by: Li Nan --- drivers/md/md.h | 3 ++- drivers/md/md.c | 4 ++++ 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/md/md.h b/drivers/md/md.h index 1a4f976951c1..75f5c5d04e71 100644 --- a/drivers/md/md.h +++ b/drivers/md/md.h @@ -589,7 +589,8 @@ static inline void md_sync_acct(struct block_device *bdev, unsigned long nr_sect static inline void md_sync_acct_bio(struct bio *bio, unsigned long nr_sectors) { - md_sync_acct(bio->bi_bdev, nr_sectors); + if (blk_queue_io_stat(bio->bi_bdev->bd_disk->queue)) + md_sync_acct(bio->bi_bdev, nr_sectors); } struct md_personality diff --git a/drivers/md/md.c b/drivers/md/md.c index 1d71b2a9af03..18bbceb0ffd6 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -8502,6 +8502,10 @@ static int is_mddev_idle(struct mddev *mddev, int init) rcu_read_lock(); rdev_for_each_rcu(rdev, mddev) { struct gendisk *disk = rdev->bdev->bd_disk; + + if (blk_queue_io_stat(mddev->queue)) + continue; + curr_events = (long long)part_stat_read_accum(disk->part0, sectors) - atomic64_read(&disk->sync_io);