diff options
| author |   Shaohua Li <shli@kernel.org> | 2012-05-21 09:26:59 +1000 |
|---|---|---|
| committer |   Ben Hutchings <ben@decadent.org.uk> | 2012-05-31 00:43:46 +0100 |
| commit | 284f9201597d8be6378a76f7dedc9e8b318ced09 (patch) | |
| tree | 1f90fb3ec6f5eb305be0028c9af9639618d2e0fa | |
| parent | 8903f762151994729c79eae3b5afc9fc399be905 (diff) | |
md: using GFP_NOIO to allocate bio for flush request
commit b5e1b8cee7ad58a15d2fa79bcd7946acb592602d upstream.
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.
Signed-off-by: Shaohua Li <shli@fusionio.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | drivers/md/md.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index adcd850335b..700ecaed62d 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -453,7 +453,7 @@ 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; |