Btrfs: use a slab for ordered extents allocation

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The ordered extent allocation is in the fast path of the IO, so use a slab
to improve the speed of the allocation.

 "Size of the struct is 280, so this will fall into the size-512 bucket,
  giving 8 objects per page, while own slab will pack 14 objects into a page.

  Another benefit I see is to check for leaked objects when the module is
  removed (and the cache destroy takes place)."
						-- David Sterba

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>

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Miao Xie 2012-09-06 04:01:51 -06:00 • committed by Chris Mason

parent b9a8cc5bef

commit 6352b91da1

3 changed files with 31 additions and 3 deletions

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23

fs/btrfs/ordered-data.c

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2

fs/btrfs/ordered-data.h

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9

fs/btrfs/super.c

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