From: David Rientjes <rientjes@google.com>
Date: Wed, 14 Nov 2012 09:15:19 +0000 (-0800)
Subject: mm, oom: ensure sysrq+f always passes valid zonelist
X-Git-Tag: v3.8-rc1~177^2~65
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5318609519800617323b5fdb17c1d4fe12c3d794;p=platform%2Fkernel%2Flinux-exynos.git

mm, oom: ensure sysrq+f always passes valid zonelist

With hotpluggable and memoryless nodes, it's possible that node 0 will
not be online, so use the first online node's zonelist rather than
hardcoding node 0 to pass a zonelist with all zones to the oom killer.

Signed-off-by: David Rientjes <rientjes@google.com>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/tty/sysrq.c b/drivers/tty/sysrq.c
index 16ee6ce..b3c4a25 100644
--- a/drivers/tty/sysrq.c
+++ b/drivers/tty/sysrq.c
@@ -346,7 +346,8 @@ static struct sysrq_key_op sysrq_term_op = {
 
 static void moom_callback(struct work_struct *ignored)
 {
-	out_of_memory(node_zonelist(0, GFP_KERNEL), GFP_KERNEL, 0, NULL, true);
+	out_of_memory(node_zonelist(first_online_node, GFP_KERNEL), GFP_KERNEL,
+		      0, NULL, true);
 }
 
 static DECLARE_WORK(moom_work, moom_callback);