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Chris Mason d1310b2e0c Btrfs: Split the extent_map code into two parts ... There is now extent_map for mapping offsets in the file to disk and extent_io for state tracking, IO submission and extent_bufers. The new extent_map code shifts from [start,end] pairs to [start,len], and pushes the locking out into the caller. This allows a few performance optimizations and is easier to use. A number of extent_map usage bugs were fixed, mostly with failing to remove extent_map entries when changing the file. Signed-off-by: Chris Mason <chris.mason@oracle.com>		2008-09-25 11:03:59 -04:00
fs/btrfs	Btrfs: Split the extent_map code into two parts	2008-09-25 11:03:59 -04:00