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authorChristoph Lameter <clameter@sgi.com>2006-03-22 00:09:08 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-22 07:54:06 -0800
commit879336c3930ae9273ea1c45214cb8adae0ce494a (patch)
tree24fbb8aff19f6747b6cc40cb05cbe9f4c21f85e3 /Kbuild
parentb18e7e654d7af741d2bf34a90dc34128d0217fea (diff)
downloadop-kernel-dev-879336c3930ae9273ea1c45214cb8adae0ce494a.zip
op-kernel-dev-879336c3930ae9273ea1c45214cb8adae0ce494a.tar.gz
[PATCH] drain_node_pages: interrupt latency reduction / optimization
1. Only disable interrupts if there is actually something to free 2. Only dirty the pcp cacheline if we actually freed something. 3. Disable interrupts for each single pcp and not for cleaning all the pcps in all zones of a node. drain_node_pages is called every 2 seconds from cache_reap. This fix should avoid most disabling of interrupts. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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