tree 9ed4d43f1ca944c23372fad6554508f1747f5e2d
parent 151a44202d097ae8b1bbaa6d8d2f97df30e3cd1e
author Paul Jackson <pj@sgi.com> 1143198972 -0800
committer Linus Torvalds <torvalds@g5.osdl.org> 1143214404 -0800

[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>