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authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>2006-06-23 02:03:13 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-23 07:42:47 -0700
commitfadd8fbd153c12963f8fe3c9ef7f8967f286f98b (patch)
tree547cdee6203b769773521118a4dd19e95a7ef3fd /mm/oom_kill.c
parent67de648211fa041fe08a0c25241a4980bbb90698 (diff)
downloadlwn-fadd8fbd153c12963f8fe3c9ef7f8967f286f98b.tar.gz
lwn-fadd8fbd153c12963f8fe3c9ef7f8967f286f98b.zip
[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 <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/oom_kill.c')
-rw-r--r--mm/oom_kill.c3
1 files changed, 3 insertions, 0 deletions
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 <linux/jiffies.h>
#include <linux/cpuset.h>
+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