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Btrfs: use cluster->window_start when allocating from a cluster bitmap 

We specifically set window_start in the cluster struct to indicate where the
cluster starts in a bitmap, but we've been using min_start to indicate where
we're searching from.  This is usually the start of the blockgroup, so
essentially means we're constantly searching from the start of any bitmap we
find, which completely negates all the trouble we go to in order to setup a
cluster.  So start using window_start to make sure we actually use the area we
found.  Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Josef Bacik 2012-01-26 15:01:11 -05:00 committed by Chris Mason
parent 8bedd51b61
commit 0b4a9d248f
1 changed files with 1 additions and 1 deletions
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2
fs/btrfs/free-space-cache.c
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@ -2242,7 +2242,7 @@ u64 btrfs_alloc_from_cluster(struct btrfs_block_group_cache *block_group,
if (entry->bitmap) {
ret = btrfs_alloc_from_bitmap(block_group,
cluster, entry, bytes,
min_start);
cluster->window_start);
if (ret == 0) {
node = rb_next(&entry->offset_index);
if (!node)