From: Mikulas Patocka The recent commit 7513c2a761d69d2a93f17146b3563527d3618ba0 (dm raid1: add is_remote_recovering hook for clusters) changed do_writes() to update the ms->writes list but forgot to wake up kmirrord to process it. The rule is that when anything is being added on ms->reads, ms->writes or ms->failures and the list was empty before we must call wakeup_mirrord (for immediate processing) or delayed_wake (for delayed processing). Otherwise the bios could sit on the list indefinitely. Signed-off-by: Mikulas Patocka CC: stable@kernel.org Signed-off-by: Alasdair G Kergon --- drivers/md/dm-raid1.c | 1 + 1 file changed, 1 insertion(+) Index: linux/drivers/md/dm-raid1.c =================================================================== --- linux.orig/drivers/md/dm-raid1.c +++ linux/drivers/md/dm-raid1.c @@ -638,6 +638,7 @@ static void do_writes(struct mirror_set spin_lock_irq(&ms->lock); bio_list_merge(&ms->writes, &requeue); spin_unlock_irq(&ms->lock); + delayed_wake(ms); } /*