linux-kernel - [PATCH 1/2] mm/page_alloc: fix wrong initialization when sysctl_min_unmapped

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Date:	Tue,  9 Aug 2016 15:30:47 +0900
From:	js1304@...il.com
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Mel Gorman <mgorman@...hsingularity.net>,
	Vlastimil Babka <vbabka@...e.cz>,
	Johannes Weiner <hannes@...xchg.org>,
	Minchan Kim <minchan@...nel.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Joonsoo Kim <iamjoonsoo.kim@....com>
Subject: [PATCH 1/2] mm/page_alloc: fix wrong initialization when sysctl_min_unmapped_ratio changes

From: Joonsoo Kim <iamjoonsoo.kim@....com>

Before resetting min_unmapped_pages, we need to initialize
min_unmapped_pages rather than min_slab_pages.

Fixes: a5f5f91da6 (mm: convert zone_reclaim to node_reclaim)
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@....com>
---
 mm/page_alloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index afdb7f8..555b609 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -6894,7 +6894,7 @@ int sysctl_min_unmapped_ratio_sysctl_handler(struct ctl_table *table, int write,
 		return rc;
 
 	for_each_online_pgdat(pgdat)
-		pgdat->min_slab_pages = 0;
+		pgdat->min_unmapped_pages = 0;
 
 	for_each_zone(zone)
 		zone->zone_pgdat->min_unmapped_pages += (zone->managed_pages *
-- 
1.9.1