From: Yu Kuai <yukuai3@huawei.com>
Date: Tue, 14 Mar 2023 09:22:58 +0800
Subject: [PATCH] md/raid10: don't call bio_start_io_acct twice for bio which
experienced read error
References: bsc#1012628
Patch-mainline: 6.3.2
Git-commit: 7cddb055bfda5f7b0be931e8ea750fc28bc18a27
[ Upstream commit 7cddb055bfda5f7b0be931e8ea750fc28bc18a27 ]
handle_read_error() will resumit r10_bio by raid10_read_request(), which
will call bio_start_io_acct() again, while bio_end_io_acct() will only
be called once.
Fix the problem by don't account io again from handle_read_error().
Fixes: 528bc2cf2fcc ("md/raid10: enable io accounting")
Suggested-by: Song Liu <song@kernel.org>
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230314012258.2395894-1-yukuai1@huaweicloud.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
drivers/md/raid10.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index dd13e97c..ea6967ae 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1248,7 +1248,8 @@ static void raid10_read_request(struct mddev *mddev, struct bio *bio,
}
slot = r10_bio->read_slot;
- if (blk_queue_io_stat(bio->bi_bdev->bd_disk->queue))
+ if (!r10_bio->start_time &&
+ blk_queue_io_stat(bio->bi_bdev->bd_disk->queue))
r10_bio->start_time = bio_start_io_acct(bio);
read_bio = bio_alloc_clone(rdev->bdev, bio, gfp, &mddev->bio_set);
@@ -1578,6 +1579,7 @@ static void __make_request(struct mddev *mddev, struct bio *bio, int sectors)
r10_bio->sector = bio->bi_iter.bi_sector;
r10_bio->state = 0;
r10_bio->read_slot = -1;
+ r10_bio->start_time = 0;
memset(r10_bio->devs, 0, sizeof(r10_bio->devs[0]) *
conf->geo.raid_disks);
--
2.35.3