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authorSiddha, Suresh B <suresh.b.siddha@intel.com>2007-08-22 14:01:49 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-08-22 19:52:46 -0700
commit1807a1aaf5f2a35ea6d4b527b28bc8889d255a2f (patch)
tree8b07b08bedebc9bc09648fa3443041a03121733f /drivers/char/ChangeLog
parent32d219854d31daba3407389ada1d454a4cd86fda (diff)
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>
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