From 25487d73a9670d911530eee2e31c20889ba117db Mon Sep 17 00:00:00 2001
From: Xishi Qiu <qiuxishi@huawei.com>
Date: Tue, 21 Jan 2014 15:50:57 -0800
Subject: lib/show_mem.c: show num_poisoned_pages when oom

Show num_poisoned_pages when oom, it is a little helpful to find the
reason.  Also it will be emitted anytime show_mem() is called.

Signed-off-by: Xishi Qiu <qiuxishi@huawei.com>
Suggested-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Acked-by: David Rientjes <rientjes@google.com>
Reviewed-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 lib/show_mem.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/show_mem.c b/lib/show_mem.c
index f58689f5a24e..09225796991a 100644
--- a/lib/show_mem.c
+++ b/lib/show_mem.c
@@ -43,4 +43,7 @@ void show_mem(unsigned int filter)
 	printk("%lu pages in pagetable cache\n",
 		quicklist_total_size());
 #endif
+#ifdef CONFIG_MEMORY_FAILURE
+	printk("%lu pages hwpoisoned\n", atomic_long_read(&num_poisoned_pages));
+#endif
 }
-- 
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