oom: use pte pages in OOM score
authorKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Wed, 27 Apr 2011 22:26:50 +0000 (15:26 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 28 Apr 2011 18:28:21 +0000 (11:28 -0700)
commitf755a042d82b51b54f3bdd0890e5ea56c0fb6807
tree15c51ff44a31c4686dbc7161184ef7f306010e0c
parent0dcecae203cd407678e7257efbc9cdd0130967cf
oom: use pte pages in OOM score

PTE pages eat up memory just like anything else, but we do not account for
them in any way in the OOM scores.  They are also _guaranteed_ to get
freed up when a process is OOM killed, while RSS is not.

Reported-by: Dave Hansen <dave@linux.vnet.ibm.com>
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: <stable@kernel.org> [2.6.36+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/oom_kill.c