]> pilppa.com Git - linux-2.6-omap-h63xx.git/commit
[PATCH] cpuset: memory_spread_slab drop useless PF_SPREAD_PAGE check
authorPaul Jackson <pj@sgi.com>
Fri, 24 Mar 2006 11:16:12 +0000 (03:16 -0800)
committerLinus Torvalds <torvalds@g5.osdl.org>
Fri, 24 Mar 2006 15:33:24 +0000 (07:33 -0800)
commitb2455396be35383c4eebc6745cc718b1dd9e23df
tree9ed4d43f1ca944c23372fad6554508f1747f5e2d
parent151a44202d097ae8b1bbaa6d8d2f97df30e3cd1e
[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>
mm/slab.c