From 91a6c4aded58cb49f99320480bad62493c288761 Mon Sep 17 00:00:00 2001 From: Tomasz Majchrzak Date: Tue, 25 Oct 2016 17:07:08 +0200 Subject: [PATCH] md: wake up personality thread after array state update When raid1/raid10 array fails to write to one of the drives, the request is added to bio_end_io_list and finished by personality thread. The thread doesn't handle it as long as MD_CHANGE_PENDING flag is set. In case of external metadata this flag is cleared, however the thread is not woken up. It causes request to be blocked for few seconds (until another action on the array wakes up the thread) or to get stuck indefinitely. Wake up personality thread once MD_CHANGE_PENDING has been cleared. Moving 'restart_array' call after the flag is cleared it not a solution because in read-write mode the call doesn't wake up the thread. Signed-off-by: Tomasz Majchrzak Signed-off-by: Shaohua Li --- drivers/md/md.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/md/md.c b/drivers/md/md.c index 7f56d67..94f882a 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -3922,6 +3922,7 @@ array_state_store(struct mddev *mddev, const char *buf, size_t len) if (st == active) { restart_array(mddev); clear_bit(MD_CHANGE_PENDING, &mddev->flags); + md_wakeup_thread(mddev->thread); wake_up(&mddev->sb_wait); err = 0; } else /* st == clean */ { -- 2.7.4