tree 8b07b08bedebc9bc09648fa3443041a03121733f
parent 32d219854d31daba3407389ada1d454a4cd86fda
author Siddha, Suresh B <suresh.b.siddha@intel.com> 1187816509 -0700
committer Linus Torvalds <torvalds@woody.linux-foundation.org> 1187837566 -0700

slab: skip calling cache_free_alien() when the platform is not numa capable

Skip calling cache_free_alien() when the platform is not numa capable.
This will avoid cache misses that happen while accessing slabp (which is
per page memory reference) to get nodeid.  Instead use a global variable to
skip the call, which is mostly likely to be present in the cache.

This gives a 0.8% performance boost with the database oltp workload on a
quad-core SMP platform and by any means the number is not small :)

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Acked-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>