From fadd8fbd153c12963f8fe3c9ef7f8967f286f98b Mon Sep 17 00:00:00 2001 From: KAMEZAWA Hiroyuki Date: Fri, 23 Jun 2006 02:03:13 -0700 Subject: [PATCH] support for panic at OOM This patch adds panic_on_oom sysctl under sys.vm. When sysctl vm.panic_on_oom = 1, the kernel panics intead of killing rogue processes. And if vm.panic_on_oom is 0 the kernel will do oom_kill() in the same way as it does today. Of course, the default value is 0 and only root can modifies it. In general, oom_killer works well and kill rogue processes. So the whole system can survive. But there are environments where panic is preferable rather than kill some processes. Signed-off-by: KAMEZAWA Hiroyuki Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/oom_kill.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'mm') diff --git a/mm/oom_kill.c b/mm/oom_kill.c index 042e6436c3ee..f9bb3cf32384 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -22,6 +22,7 @@ #include #include +int sysctl_panic_on_oom; /* #define DEBUG */ /** @@ -344,6 +345,8 @@ void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask, int order) break; case CONSTRAINT_NONE: + if (sysctl_panic_on_oom) + panic("out of memory. panic_on_oom is selected\n"); retry: /* * Rambo mode: Shoot down a process and hope it solves whatever -- cgit v1.2.3