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authorPaul Jackson <pj@sgi.com>2006-03-24 03:16:12 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-24 07:33:24 -0800
commitb2455396be35383c4eebc6745cc718b1dd9e23df (patch)
tree9ed4d43f1ca944c23372fad6554508f1747f5e2d /fs
parent151a44202d097ae8b1bbaa6d8d2f97df30e3cd1e (diff)
[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 <pj@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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