tree ae8f51cef37239a4ebe12379deca7042680161c1
parent 024f9066165ffe9c8284431c78adcbcddd309831
author Richard Kennedy <richard@rsk.demon.co.uk> 1267189243 +0100
committer Jens Axboe <jens.axboe@oracle.com> 1267189243 +0100

block: remove padding from io_context on 64bit builds

On 64 bit builds when CONFIG_BLK_CGROUP=n (the default) this removes 8
bytes of padding from structure io_context and drops its size from 72 to
64 bytes, so needing one fewer cachelines and allowing more objects per
slab in it's kmem_cache.

Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk>

----
patch against 2.6.33
compiled & test on x86_64 AMDX2
regards
Richard
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>