btrfs: Free fully occupied bitmap in cluster

If there's no more free space in a bitmap, we should free it. Reviewed-by: Josef Bacik <josef@redhat.com> Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
git-mirror · Jan 26, 2011 · 70b7da3 · 70b7da3
1 parent edf6e2d
commit 70b7da3
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
@@ -1788,6 +1788,8 @@ static u64 btrfs_alloc_from_bitmap(struct btrfs_block_group_cache *block_group,
 
 	ret = search_start;
 	bitmap_clear_bits(block_group, entry, ret, bytes);
+	if (entry->bytes == 0)
+		free_bitmap(block_group, entry);
 out:
 	spin_unlock(&cluster->lock);
 	spin_unlock(&block_group->tree_lock);