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Chris Mason d7fc640e6f Btrfs: Allocator improvements 
Reduce CPU time searching for free blocks by optimizing find_first_extent_bit

Fix find_free_extent to make better use of the last_alloc hint.  Before it
was often finding blocks just before the hint.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
History 2008-09-25 11:04:00 -04:00
fs/btrfs Btrfs: Allocator improvements 2008-09-25 11:04:00 -04:00