Merge tag 'dm-3.14-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm

Pull device-mapper changes from Mike Snitzer:
 "A lot of attention was paid to improving the thin-provisioning
  target's handling of metadata operation failures and running out of
  space.  A new 'error_if_no_space' feature was added to allow users to
  error IOs rather than queue them when either the data or metadata
  space is exhausted.

  Additional fixes/features include:
   - a few fixes to properly support thin metadata device resizing
   - a solution for reliably waiting for a DM device's embedded kobject
     to be released before destroying the device
   - old dm-snapshot is updated to use the dm-bufio interface to take
     advantage of readahead capabilities that improve snapshot
     activation
   - new dm-cache target tunables to control how quickly data is
     promoted to the cache (fast) device
   - improved write efficiency of cluster mirror target by combining
     userspace flush and mark requests"

* tag 'dm-3.14-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: (35 commits)
  dm log userspace: allow mark requests to piggyback on flush requests
  dm space map metadata: fix bug in resizing of thin metadata
  dm cache: add policy name to status output
  dm thin: fix pool feature parsing
  dm sysfs: fix a module unload race
  dm snapshot: use dm-bufio prefetch
  dm snapshot: use dm-bufio
  dm snapshot: prepare for switch to using dm-bufio
  dm snapshot: use GFP_KERNEL when initializing exceptions
  dm cache: add block sizes and total cache blocks to status output
  dm btree: add dm_btree_find_lowest_key
  dm space map metadata: fix extending the space map
  dm space map common: make sure new space is used during extend
  dm: wait until embedded kobject is released before destroying a device
  dm: remove pointless kobject comparison in dm_get_from_kobject
  dm snapshot: call destroy_work_on_stack() to pair with INIT_WORK_ONSTACK()
  dm cache policy mq: introduce three promotion threshold tunables
  dm cache policy mq: use list_del_init instead of list_del + INIT_LIST_HEAD
  dm thin: fix set_pool_mode exposed pool operation races
  dm thin: eliminate the no_free_space flag
  ...

1 files changed, 5 insertions, 5 deletions

diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c
index 944690bafd93..717718558bd9 100644
--- a/drivers/md/dm-snap.c
+++ b/drivers/md/dm-snap.c
@@ -610,12 +610,12 @@ static struct dm_exception *dm_lookup_exception(struct dm_exception_table *et,
 	return NULL;
 }
 
-static struct dm_exception *alloc_completed_exception(void)
+static struct dm_exception *alloc_completed_exception(gfp_t gfp)
 {
 	struct dm_exception *e;
 
-	e = kmem_cache_alloc(exception_cache, GFP_NOIO);
-	if (!e)
+	e = kmem_cache_alloc(exception_cache, gfp);
+	if (!e && gfp == GFP_NOIO)
 		e = kmem_cache_alloc(exception_cache, GFP_ATOMIC);
 
 	return e;
@@ -697,7 +697,7 @@ static int dm_add_exception(void *context, chunk_t old, chunk_t new)
 	struct dm_snapshot *s = context;
 	struct dm_exception *e;
 
-	e = alloc_completed_exception();
+	e = alloc_completed_exception(GFP_KERNEL);
 	if (!e)
 		return -ENOMEM;
 
@@ -1405,7 +1405,7 @@ static void pending_complete(struct dm_snap_pending_exception *pe, int success)
 		goto out;
 	}
 
-	e = alloc_completed_exception();
+	e = alloc_completed_exception(GFP_NOIO);
 	if (!e) {
 		down_write(&s->lock);
 		__invalidate_snapshot(s, -ENOMEM);