This is a note to let you know that I've just added the patch titled

md/raid10: wait up frozen array in handle_write_completed

to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: md-raid10-wait-up-frozen-array-in-handle_write_completed.patch and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From foo@baz Thu Mar 22 14:57:32 CET 2018

From: Guoqing Jiang gqjiang@suse.com Date: Mon, 17 Apr 2017 17:11:05 +0800 Subject: md/raid10: wait up frozen array in handle_write_completed

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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/md/raid10.c | 5 +++++ 1 file changed, 5 insertions(+)

--- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -2698,6 +2698,11 @@ static void handle_write_completed(struc 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,

Patches currently in stable-queue which might be from gqjiang@suse.com are

queue-4.4/md-raid10-wait-up-frozen-array-in-handle_write_completed.patch queue-4.4/md-raid10-skip-spare-disk-as-first-disk.patch