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Btrfs: skip allocation attempt from empty cluster 

If we don't have a cluster, don't bother trying to allocate from it,
jumping right away to the attempt to allocate a new cluster.

Signed-off-by: Alexandre Oliva <oliva@lsd.ic.unicamp.br>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Alexandre Oliva 2011-11-30 13:43:00 -05:00 committed by Chris Mason
parent 425d83156c
commit be064d1139
1 changed files with 3 additions and 3 deletions
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6
fs/btrfs/extent-tree.c
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@ -5299,9 +5299,9 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans,
* people trying to start a new cluster
*/
spin_lock(&last_ptr->refill_lock);
if (last_ptr->block_group &&
(last_ptr->block_group->ro ||
!block_group_bits(last_ptr->block_group, data)))
if (!last_ptr->block_group ||
last_ptr->block_group->ro ||
!block_group_bits(last_ptr->block_group, data))
goto refill_cluster;
offset = btrfs_alloc_from_cluster(block_group, last_ptr,