From 376830c340eca3f6c2f872a50b90afc0ebf88c72 Mon Sep 17 00:00:00 2001 From: Ofer Heifetz Date: Mon, 24 Jul 2017 09:17:40 +0300 Subject: md/raid5: add thread_group worker async_tx_issue_pending_all commit 7e96d559634b73a8158ee99a7abece2eacec2668 upstream. Since thread_group worker and raid5d kthread are not in sync, if worker writes stripe before raid5d then requests will be waiting for issue_pendig. Issue observed when building raid5 with ext4, in some build runs jbd2 would get hung and requests were waiting in the HW engine waiting to be issued. Fix this by adding a call to async_tx_issue_pending_all in the raid5_do_work. Signed-off-by: Ofer Heifetz Signed-off-by: Shaohua Li Signed-off-by: Greg Kroah-Hartman --- drivers/md/raid5.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers') diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index fc182c4f2619..8f60520c8392 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -5821,6 +5821,8 @@ static void raid5_do_work(struct work_struct *work) pr_debug("%d stripes handled\n", handled); spin_unlock_irq(&conf->device_lock); + + async_tx_issue_pending_all(); blk_finish_plug(&plug); pr_debug("--- raid5worker inactive\n"); -- cgit v1.2.3