Commit 034e33f5 authored Nov 21, 2016 by Shaohua Li

md: stop write should stop journal reclaim



__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@fb.com>
Reviewed-by: NeilBrown <neilb@suse.de>
Cc: Song Liu <songliubraving@fb.com>

parent ce1ccd07

drivers/md/md.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -5517,6 +5517,10 @@ 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 &&