[dm-devel] [PATCH -next v2 0/6] md: fix that MD_RECOVERY_RUNNING can be cleared while sync_thread is still running
Yu Kuai
yukuai1 at huaweicloud.com
Thu Jun 8 02:41:01 UTC 2023
Hi,
在 2023/05/29 21:20, Yu Kuai 写道:
> From: Yu Kuai <yukuai3 at huawei.com>
>
> Changes in v2:
> - rebase for the latest md-next
>
> Patch 1 revert the commit because it will cause MD_RECOVERY_RUNNING to be
> cleared while sync_thread is still running. The deadlock this patch tries
> to fix will be fixed by patch 2-5.
>
> Patch 6 enhance checking to prevent MD_RECOVERY_RUNNING to be cleared
> while sync_thread is still running.
Any suggestions on this patchset? I already sent regression test
for the deadlock problem for both raid10 and raid456.
Thanks,
Kuai
>
> Yu Kuai (6):
> Revert "md: unlock mddev before reap sync_thread in action_store"
> md: refactor action_store() for 'idle' and 'frozen'
> md: add a mutex to synchronize idle and frozen in action_store()
> md: refactor idle/frozen_sync_thread() to fix deadlock
> md: wake up 'resync_wait' at last in md_reap_sync_thread()
> md: enhance checking in md_check_recovery()
>
> drivers/md/dm-raid.c | 1 -
> drivers/md/md.c | 124 +++++++++++++++++++++++++++++--------------
> drivers/md/md.h | 5 ++
> 3 files changed, 88 insertions(+), 42 deletions(-)
>
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