From 27cdebeb11132cf39214b84137074ef10b43da0b Mon Sep 17 00:00:00 2001
From: Andrew Morton <akpm@linux-foundation.org>
Date: Thu, 17 Nov 2011 10:41:26 +1100
Subject: [PATCH] mm-avoid-livelock-on-__gfp_fs-allocations-fix

augment comment

Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Colin Cross <ccross@android.com>
Cc: David Rientjes <rientjes@google.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
 mm/page_alloc.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index d768e40d2f16..a150e5a7a6ab 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2263,9 +2263,10 @@ rebalance:
 		}
 
 		/*
-		 * Suspend converts GFP_KERNEL to __GFP_WAIT which can
-		 * prevent reclaim making forward progress without
-		 * invoking OOM. Bail if we are suspending
+		 * Suspend converts GFP_KERNEL to __GFP_WAIT which can prevent
+		 * reclaim making forward progress without invoking OOM.
+		 * Suspend also disables storage devices so kswapd cannot save
+		 * us.  Bail if we are suspending.
 		 */
 		if (pm_suspending())
 			goto nopage;
-- 
2.39.5