[PATCH 5/5] mm: use KERN_DEBUG for dump_stack() during an OOM

[aris@redhat.com]

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dump_stack() isn't always useful and in some scenarios OOMs can be quite
common and there's no need to flood the console with dump_stack()'s output.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Greg Thelen <gthelen@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Aristeu Rozanski <aris@redhat.com>

---
 mm/oom_kill.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- linux-2.6.orig/mm/oom_kill.c	2015-10-27 09:24:01.014413690 -0400
+++ linux-2.6/mm/oom_kill.c	2015-11-05 14:51:31.091521337 -0500
@@ -384,7 +384,7 @@ pr_warning("%s invoked oom-killer: gfp_m
 		current->signal->oom_score_adj);
 	cpuset_print_task_mems_allowed(current);
 	task_unlock(current);
-	dump_stack();
+	dump_stack_lvl(KERN_DEBUG);
 	if (memcg)
 		mem_cgroup_print_oom_info(memcg, p);
 	else

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