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btrfs: Free fully occupied bitmap in cluster

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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>
This commit is contained in:
Li Zefan
2010-11-09 14:51:45 +08:00
parent edf6e2d1dd
commit 70b7da304f
1 changed files with 2 additions and 0 deletions
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2
fs/btrfs/free-space-cache.c
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@@ -1788,6 +1788,8 @@ static u64 btrfs_alloc_from_bitmap(struct btrfs_block_group_cache *block_group,
ret = search_start; ret = search_start;
bitmap_clear_bits(block_group, entry, ret, bytes); bitmap_clear_bits(block_group, entry, ret, bytes);
if (entry->bytes == 0)
free_bitmap(block_group, entry);
out: out:
spin_unlock(&cluster->lock); spin_unlock(&cluster->lock);
spin_unlock(&block_group->tree_lock); spin_unlock(&block_group->tree_lock);