From: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Subject: mm/vmstat: make node_page_state() handles all zones by itself
node_page_state() manually adds statistics per each zone and returns total
value for all zones. Whenever we add a new zone, we need to consider this
function and it's really troublesome. Make it handle all zones by itself.
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: Laura Abbott <lauraa@xxxxxxxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Cc: Michal Nazarewicz <mina86@xxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmstat.c | 18 ++++++------------
1 file changed, 6 insertions(+), 12 deletions(-)
diff -puN mm/vmstat.c~mm-vmstat-make-node_page_state-handles-all-zones-by-itself mm/vmstat.c
--- a/mm/vmstat.c~mm-vmstat-make-node_page_state-handles-all-zones-by-itself
+++ a/mm/vmstat.c
@@ -600,19 +600,13 @@ void zone_statistics(struct zone *prefer
unsigned long node_page_state(int node, enum zone_stat_item item)
{
struct zone *zones = NODE_DATA(node)->node_zones;
+ int i;
+ unsigned long count = 0;
- return
-#ifdef CONFIG_ZONE_DMA
- zone_page_state(&zones[ZONE_DMA], item) +
-#endif
-#ifdef CONFIG_ZONE_DMA32
- zone_page_state(&zones[ZONE_DMA32], item) +
-#endif
-#ifdef CONFIG_HIGHMEM
- zone_page_state(&zones[ZONE_HIGHMEM], item) +
-#endif
- zone_page_state(&zones[ZONE_NORMAL], item) +
- zone_page_state(&zones[ZONE_MOVABLE], item);
+ for (i = 0; i < MAX_NR_ZONES; i++)
+ count += zone_page_state(zones + i, item);
+
+ return count;
}
#endif
_
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