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Btrfs: don't skip writing out a empty block groups cache 

I noticed a slight bug where we will not bother writing out the block group
cache's space cache if it's space tree is empty.  Since it could have a cluster
or pinned extents that need to be written out this is just not a valid test.
Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>
This commit is contained in:
Josef Bacik 2011-10-05 10:00:18 -04:00
parent 73bc187680
commit f75b130e9b
1 changed files with 6 additions and 4 deletions
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10
fs/btrfs/free-space-cache.c
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@ -575,10 +575,6 @@ int __btrfs_write_out_cache(struct btrfs_root *root, struct inode *inode,
INIT_LIST_HEAD(&bitmap_list);
node = rb_first(&ctl->free_space_offset);
if (!node)
return -1;
if (!i_size_read(inode))
return -1;
@ -639,6 +635,12 @@ int __btrfs_write_out_cache(struct btrfs_root *root, struct inode *inode,
if (block_group)
start = block_group->key.objectid;
node = rb_first(&ctl->free_space_offset);
if (!node && cluster) {
node = rb_first(&cluster->root);
cluster = NULL;
}
/* Write out the extent entries */
do {
struct btrfs_free_space_entry *entry;