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md: bypass block throttle for superblock update

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[ Upstream commit d6e035aad6 ]

commit 5e2cf333b7 ("md/raid5: Wait for MD_SB_CHANGE_PENDING in raid5d")
introduced a hung bug and will be reverted in next patch, since the issue
that commit is fixing is due to md superblock write is throttled by wbt,
to fix it, we can have superblock write bypass block layer throttle.

Fixes: 5e2cf333b7 ("md/raid5: Wait for MD_SB_CHANGE_PENDING in raid5d")
Cc: stable@vger.kernel.org # v5.19+
Suggested-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20231108182216.73611-1-junxiao.bi@oracle.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Junxiao Bi 2023-11-08 10:22:15 -08:00 committed by Greg Kroah-Hartman
parent 49bca0710e
commit 56f98598dd
1 changed files with 4 additions and 3 deletions
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7
drivers/md/md.c
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@ -940,9 +940,10 @@ void md_super_write(struct mddev *mddev, struct md_rdev *rdev,
return;
bio = bio_alloc_bioset(rdev->meta_bdev ? rdev->meta_bdev : rdev->bdev,
1,
REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH | REQ_FUA,
GFP_NOIO, &mddev->sync_set);
1,
REQ_OP_WRITE | REQ_SYNC | REQ_IDLE | REQ_META
| REQ_PREFLUSH | REQ_FUA,
GFP_NOIO, &mddev->sync_set);
atomic_inc(&rdev->nr_pending);