Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit b5e1b8ce authored by Shaohua Li's avatar Shaohua Li Committed by NeilBrown
Browse files

md: using GFP_NOIO to allocate bio for flush request 



A flush request is usually issued in transaction commit code path, so
using GFP_KERNEL to allocate memory for flush request bio falls into
the classic deadlock issue.

This is suitable for any -stable kernel to which it applies as it
avoids a possible deadlock.

Cc: stable@vger.kernel.org
Signed-off-by: default avatarShaohua Li <shli@fusionio.com>
Signed-off-by: default avatarNeilBrown <neilb@suse.de>
parent b0d634d5

drivers/md/md.c

+1 −1
Original line number Diff line number Diff line
@@ -452,7 +452,7 @@ static void submit_flushes(struct work_struct *ws) 
			atomic_inc(&rdev->nr_pending);

			atomic_inc(&rdev->nr_pending);

			rcu_read_unlock();

			bi = bio_alloc_mddev(GFP_KERNEL, 0, mddev);

			bi = bio_alloc_mddev(GFP_NOIO, 0, mddev);

			bi->bi_end_io = md_end_flush;

			bi->bi_private = rdev;

			bi->bi_bdev = rdev->bdev;