This is a note to let you know that I've just added the patch titled
raid10: include bio_end_io_list in nr_queued to prevent freeze_array hang
to the 4.4-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:
raid10-include-bio_end_io_list-in-nr_queued-to-prevent-freeze_array-hang.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@xxxxxxxxxxxxxxx> know about it.
>From 23ddba80ebe836476bb2fa1f5ef305dd1c63dc0b Mon Sep 17 00:00:00 2001
From: Shaohua Li <shli@xxxxxx>
Date: Mon, 14 Mar 2016 11:49:32 -0700
Subject: raid10: include bio_end_io_list in nr_queued to prevent freeze_array hang
From: Shaohua Li <shli@xxxxxx>
commit 23ddba80ebe836476bb2fa1f5ef305dd1c63dc0b upstream.
This is the raid10 counterpart of the bug fixed by Nate
(raid1: include bio_end_io_list in nr_queued to prevent freeze_array hang)
Fixes: 95af587e95(md/raid10: ensure device failure recorded before write request returns)
Cc: Nate Dailey <nate.dailey@xxxxxxxxxxx>
Signed-off-by: Shaohua Li <shli@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/md/raid10.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -2664,6 +2664,7 @@ static void handle_write_completed(struc
if (fail) {
spin_lock_irq(&conf->device_lock);
list_add(&r10_bio->retry_list, &conf->bio_end_io_list);
+ conf->nr_queued++;
spin_unlock_irq(&conf->device_lock);
md_wakeup_thread(conf->mddev->thread);
} else {
@@ -2691,8 +2692,10 @@ static void raid10d(struct md_thread *th
LIST_HEAD(tmp);
spin_lock_irqsave(&conf->device_lock, flags);
if (!test_bit(MD_CHANGE_PENDING, &mddev->flags)) {
- list_add(&tmp, &conf->bio_end_io_list);
- list_del_init(&conf->bio_end_io_list);
+ while (!list_empty(&conf->bio_end_io_list)) {
+ list_move(conf->bio_end_io_list.prev, &tmp);
+ conf->nr_queued--;
+ }
}
spin_unlock_irqrestore(&conf->device_lock, flags);
while (!list_empty(&tmp)) {
Patches currently in stable-queue which might be from shli@xxxxxx are
queue-4.4/raid10-include-bio_end_io_list-in-nr_queued-to-prevent-freeze_array-hang.patch
queue-4.4/md-multipath-don-t-hardcopy-bio-in-.make_request-path.patch
queue-4.4/raid5-revert-e9e4c377e2f563-to-fix-a-livelock.patch
queue-4.4/raid1-include-bio_end_io_list-in-nr_queued-to-prevent-freeze_array-hang.patch
queue-4.4/raid5-check_reshape-shouldn-t-call-mddev_suspend.patch
queue-4.4/md-raid5-compare-apples-to-apples-or-sectors-to-sectors.patch
queue-4.4/md-raid5-preserve-stripe_preread_active-in-break_stripe_batch_list.patch
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