From 524a23f4e551ec53438801a5042e2a2384329ae2 Mon Sep 17 00:00:00 2001
From: Shaohua Li <shaohua.li@intel.com>
Date: Thu, 25 Aug 2011 09:47:04 +1000
Subject: [PATCH] It's possible a zone watermark is ok when entering the
 balance_pgdat() loop, while the zone is within the requested classzone_idx. 
 Count pages from this zone into `balanced'.  In this way, we can skip
 shrinking zones too much for high order allocation.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
 mm/vmscan.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mm/vmscan.c b/mm/vmscan.c
index c9a97ac0d554..0ba2b502c474 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2761,6 +2761,8 @@ out:
 
 			/* If balanced, clear the congested flag */
 			zone_clear_flag(zone, ZONE_CONGESTED);
+			if (i <= *classzone_idx)
+				balanced += zone->present_pages;
 		}
 	}
 
-- 
2.39.5