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authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>2008-10-18 20:28:11 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-20 08:52:39 -0700
commitc05555b572921c464d064d9267f7f7bc06d424fa (patch)
tree48d4dbc315eeb4c851c6c484ef75bc816360d510 /mm/Makefile
parentaddb9efebb2ee2202d324e75b593b39868528f68 (diff)
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memcg: atomic ops for page_cgroup->flags
This patch makes page_cgroup->flags to be atomic_ops and define functions (and macros) to access it. Before trying to modify memory resource controller, this atomic operation on flags is necessary. Most of flags in this patch is for LRU and modfied under mz->lru_lock but we'll add another flags which is not for LRU soon. For example, we'll place LOCK bit on flags field. We need atomic operation to modify LRU bit without LOCK. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com> Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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