From 609838cfed972d49a65aac7923a9ff5cbe482e30 Mon Sep 17 00:00:00 2001 From: Johannes Weiner Date: Mon, 8 Jul 2013 15:59:50 -0700 Subject: mm: invoke oom-killer from remaining unconverted page fault handlers A few remaining architectures directly kill the page faulting task in an out of memory situation. This is usually not a good idea since that task might not even use a significant amount of memory and so may not be the optimal victim to resolve the situation. Since 2.6.29's 1c0fe6e ("mm: invoke oom-killer from page fault") there is a hook that architecture page fault handlers are supposed to call to invoke the OOM killer and let it pick the right task to kill. Convert the remaining architectures over to this hook. To have the previous behavior of simply taking out the faulting task the vm.oom_kill_allocating_task sysctl can be set to 1. Signed-off-by: Johannes Weiner Reviewed-by: Michal Hocko Cc: KAMEZAWA Hiroyuki Acked-by: David Rientjes Acked-by: Vineet Gupta [arch/arc bits] Cc: James Hogan Cc: David Howells Cc: Jonas Bonn Cc: Chen Liqin Cc: Lennox Wu Cc: Chris Metcalf Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/arc/mm/fault.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'arch/arc/mm') diff --git a/arch/arc/mm/fault.c b/arch/arc/mm/fault.c index 318164c..0fd1f0d 100644 --- a/arch/arc/mm/fault.c +++ b/arch/arc/mm/fault.c @@ -207,8 +207,10 @@ out_of_memory: } up_read(&mm->mmap_sem); - if (user_mode(regs)) - do_group_exit(SIGKILL); /* This will never return */ + if (user_mode(regs)) { + pagefault_out_of_memory(); + return; + } goto no_context; -- cgit v1.1