Patch "md/raid10: wait up frozen array in handle_write_completed" has been added to the 4.9-stable tree

Patch "md/raid10: wait up frozen array in handle_write_completed" has been added to the 4.9-stable tree

[gregkh]

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 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

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-4.9 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 14:40:23 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
@@ -2704,6 +2704,11 @@ 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-4.9/md-raid10-wait-up-frozen-array-in-handle_write_completed.patch
queue-4.9/md-raid10-skip-spare-disk-as-first-disk.patch