From: Paul Jackson Date: Fri, 24 Mar 2006 11:16:12 +0000 (-0800) Subject: [PATCH] cpuset: memory_spread_slab drop useless PF_SPREAD_PAGE check X-Git-Tag: v2.6.17-rc1~919 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b2455396be35383c4eebc6745cc718b1dd9e23df;p=pandora-kernel.git [PATCH] cpuset: memory_spread_slab drop useless PF_SPREAD_PAGE check The hook in the slab cache allocation path to handle cpuset memory spreading for tasks in cpusets with 'memory_spread_slab' enabled has a modest performance bug. The hook calls into the memory spreading handler alternate_node_alloc() if either of 'memory_spread_slab' or 'memory_spread_page' is enabled, even though the handler does nothing (albeit harmlessly) for the page case Fix - drop PF_SPREAD_PAGE from the set of flag bits that are used to trigger a call to alternate_node_alloc(). The page case is handled by separate hooks -- see the calls conditioned on cpuset_do_page_mem_spread() in mm/filemap.c Signed-off-by: Paul Jackson Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Reading git-diff-tree failed