__md_stop_writes currently doesn't stop raid5-cache reclaim thread. It's
possible the reclaim thread is still running and doing write, which
doesn't match what __md_stop_writes should do. The extra ->quiesce()
call should not harm any raid types. For raid5-cache, this will
guarantee we reclaim all caches before we update superblock.
Signed-off-by: Shaohua Li <shli@xxxxxx>
---
drivers/md/md.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/md/md.c b/drivers/md/md.c
index f548469..560150c 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -5474,6 +5474,10 @@ static void __md_stop_writes(struct mddev *mddev)
del_timer_sync(&mddev->safemode_timer);
+ if (mddev->pers && mddev->pers->quiesce) {
+ mddev->pers->quiesce(mddev, 1);
+ mddev->pers->quiesce(mddev, 0);
+ }
bitmap_flush(mddev);
if (mddev->ro == 0 &&
--
2.9.3
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