From: Guoqing Jiang gqjiang@suse.com
[ Upstream commit cf25ae78fc50010f66b9be945017796da34c434d ]
Since nr_queued is changed, we need to call wake_up here if the array is already frozen and waiting for condition "nr_pending == nr_queued + extra" to be true.
And commit 824e47daddbf ("RAID1: avoid unnecessary spin locks in I/O barrier code") which has already added the wake_up for raid1.
Signed-off-by: Guoqing Jiang gqjiang@suse.com Reviewed-by: NeilBrown neilb@suse.com Signed-off-by: Shaohua Li shli@fb.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com --- drivers/md/raid10.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index a8a86d450d76..05548af8df6f 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -2698,6 +2698,11 @@ static void handle_write_completed(struct r10conf *conf, struct r10bio *r10_bio) list_add(&r10_bio->retry_list, &conf->bio_end_io_list); conf->nr_queued++; spin_unlock_irq(&conf->device_lock); + /* + * In case freeze_array() is waiting for condition + * nr_pending == nr_queued + extra to be true. + */ + wake_up(&conf->wait_barrier); md_wakeup_thread(conf->mddev->thread); } else { if (test_bit(R10BIO_WriteError,