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Btrfs: free bitmaps properly when evicting the cache 

If our space cache is wrong, we do the right thing and free up everything that
we loaded, however we don't reset the total_bitmaps counter or the thresholds or
anything.  So in btrfs_remove_free_space_cache make sure to call free_bitmap()
if it's a bitmap, this will keep us from panicing when we check to make sure we
don't have too many bitmaps.  Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
hifive-unleashed-5.1
Josef Bacik 2011-04-25 19:43:52 -04:00 committed by Chris Mason
parent f789b684bd
commit a4f0162fd4
1 changed files with 7 additions and 4 deletions
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11
fs/btrfs/free-space-cache.c
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@ -1768,10 +1768,13 @@ void btrfs_remove_free_space_cache(struct btrfs_block_group_cache *block_group)
while ((node = rb_last(&block_group->free_space_offset)) != NULL) {
info = rb_entry(node, struct btrfs_free_space, offset_index);
unlink_free_space(block_group, info);
if (info->bitmap)
kfree(info->bitmap);
kmem_cache_free(btrfs_free_space_cachep, info);
if (!info->bitmap) {
unlink_free_space(block_group, info);
kmem_cache_free(btrfs_free_space_cachep, info);
} else {
free_bitmap(block_group, info);
}
if (need_resched()) {
spin_unlock(&block_group->tree_lock);
cond_resched();