Btrfs: use a slab for the free space entries
authorJosef Bacik <josef@redhat.com>
Fri, 28 Jan 2011 22:05:48 +0000 (17:05 -0500)
committerJosef Bacik <josef@redhat.com>
Thu, 17 Mar 2011 18:21:20 +0000 (14:21 -0400)
Since we alloc/free free space entries a whole lot, lets use a slab to keep
track of them.  This makes some of my tests slightly faster.  Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>

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