This is a note to let you know that I've just added the patch titled
md: don't clear MD_RECOVERY_FROZEN for new dm-raid until resume
to the 6.7-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-don-t-clear-md_recovery_frozen-for-new-dm-raid-un.patch
and it can be found in the queue-6.7 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 4174cfb9883dfdf714bf67b0f52cd735f527705d
Author: Yu Kuai <yukuai3@xxxxxxxxxx>
Date: Tue Mar 5 15:22:58 2024 +0800
md: don't clear MD_RECOVERY_FROZEN for new dm-raid until resume
[ Upstream commit 2f03d0c2cd451c7ac2f317079d4ec518f0986b55 ]
After commit 9dbd1aa3a81c ("dm raid: add reshaping support to the
target") raid_ctr() will set MD_RECOVERY_FROZEN before md_run() and
expect to keep array frozen until resume. However, md_run() will clear
the flag by setting mddev->recovery to 0.
Before commit 1baae052cccd ("md: Don't ignore suspended array in
md_check_recovery()"), dm-raid actually relied on suspending to prevent
starting new sync_thread.
Fix this problem by keeping 'MD_RECOVERY_FROZEN' for dm-raid in
md_run().
Fixes: 1baae052cccd ("md: Don't ignore suspended array in md_check_recovery()")
Fixes: 9dbd1aa3a81c ("dm raid: add reshaping support to the target")
Cc: stable@xxxxxxxxxxxxxxx # v6.7+
Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx>
Signed-off-by: Xiao Ni <xni@xxxxxxxxxx>
Acked-by: Mike Snitzer <snitzer@xxxxxxxxxx>
Signed-off-by: Song Liu <song@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20240305072306.2562024-2-yukuai1@xxxxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 40dea4c06457f..007fd071b44ed 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -6064,7 +6064,10 @@ int md_run(struct mddev *mddev)
pr_warn("True protection against single-disk failure might be compromised.\n");
}
- mddev->recovery = 0;
+ /* dm-raid expect sync_thread to be frozen until resume */
+ if (mddev->gendisk)
+ mddev->recovery = 0;
+
/* may be over-ridden by personality */
mddev->resync_max_sectors = mddev->dev_sectors;
