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md: warn about updating super block failure

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Many personalities will handle IO error from daemon thread(like raid1d,
raid10d, raid5d), and sb will require to be clean before hanlding these
failed IO. However update sb can fail, for example array is broken by
IO failure, or user config sysfs api array_state.

This patch adds warning if updating sb failed first, in case this will
be related to IO hang.

Link: https://lore.kernel.org/linux-raid/20251117085557.770572-2-yukuai@fnnas.com
Signed-off-by: Yu Kuai <yukuai@fnnas.com>
Reviewed-by: Li Nan <linan122@huawei.com>
This commit is contained in:
Yu Kuai
2025-11-17 16:55:56 +08:00
parent 46f21952c4
commit 8c9e376b9d
1 changed files with 1 additions and 0 deletions
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1
drivers/md/md.c
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@@ -2788,6 +2788,7 @@ void md_update_sb(struct mddev *mddev, int force_change)
if (!md_is_rdwr(mddev)) {
if (force_change)
set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
pr_err("%s: can't update sb for read-only array %s\n", __func__, mdname(mddev));
return;
}