Chris Mason 70dec8079d Btrfs: extent_io and extent_state optimizations ...

The end_bio routines are changed to take a pointer to the extent state
struct, and the state tree is walked in order to set/clear appropriate
bits as IO completes.  This greatly reduces the number of rbtree searches
done by the end_bio handlers, and reduces lock contention.

The extent_io releasepage function is changed to avoid expensive searches
for locked state.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

2008-09-25 11:03:59 -04:00

fs/btrfs

Btrfs: extent_io and extent_state optimizations

2008-09-25 11:03:59 -04:00

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