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Yan Zheng 31153d8128 Btrfs: Add a leaf reference cache ... Much of the IO done while dropping snapshots is done looking up leaves in the filesystem trees to see if they point to any extents and to drop the references on any extents found. This creates a cache so that IO isn't required. Signed-off-by: Chris Mason <chris.mason@oracle.com>		2008-09-25 11:04:05 -04:00
fs/btrfs	Btrfs: Add a leaf reference cache	2008-09-25 11:04:05 -04:00