arch: mm: do not invoke OOM killer on kernel fault OOM
authorJohannes Weiner <hannes@cmpxchg.org>
Thu, 12 Sep 2013 22:13:38 +0000 (15:13 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 12 Sep 2013 22:38:01 +0000 (15:38 -0700)
commit871341023c771ad233620b7a1fb3d9c7031c4e5c
treef2b008756dffce639759f74885b23e92886600d6
parent94bce453c78996cc4373d5da6cfabe07fcc6d9f9
arch: mm: do not invoke OOM killer on kernel fault OOM

Kernel faults are expected to handle OOM conditions gracefully (gup,
uaccess etc.), so they should never invoke the OOM killer.  Reserve this
for faults triggered in user context when it is the only option.

Most architectures already do this, fix up the remaining few.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: David Rientjes <rientjes@google.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: azurIt <azurit@pobox.sk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
arch/arm/mm/fault.c
arch/arm64/mm/fault.c
arch/avr32/mm/fault.c
arch/mips/mm/fault.c
arch/um/kernel/trap.c
arch/unicore32/mm/fault.c