This is a note to let you know that I've just added the patch titled
md: bypass block throttle for superblock update
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
md-bypass-block-throttle-for-superblock-update.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From d6e035aad6c09991da1c667fb83419329a3baed8 Mon Sep 17 00:00:00 2001
From: Junxiao Bi <junxiao.bi@xxxxxxxxxx>
Date: Wed, 8 Nov 2023 10:22:15 -0800
Subject: md: bypass block throttle for superblock update
From: Junxiao Bi <junxiao.bi@xxxxxxxxxx>
commit d6e035aad6c09991da1c667fb83419329a3baed8 upstream.
commit 5e2cf333b7bd ("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: 5e2cf333b7bd ("md/raid5: Wait for MD_SB_CHANGE_PENDING in raid5d")
Cc: stable@xxxxxxxxxxxxxxx # v5.19+
Suggested-by: Yu Kuai <yukuai3@xxxxxxxxxx>
Signed-off-by: Junxiao Bi <junxiao.bi@xxxxxxxxxx>
Reviewed-by: Logan Gunthorpe <logang@xxxxxxxxxxxx>
Reviewed-by: Yu Kuai <yukuai3@xxxxxxxxxx>
Signed-off-by: Song Liu <song@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20231108182216.73611-1-junxiao.bi@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/md/md.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -963,9 +963,10 @@ void md_super_write(struct mddev *mddev,
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);
Patches currently in stable-queue which might be from junxiao.bi@xxxxxxxxxx are
queue-6.1/md-bypass-block-throttle-for-superblock-update.patch
