shrink_zone      1319 mm/vmscan.c    		nr_reclaimed += shrink_zone(priority, zone, sc);
shrink_zone      1606 mm/vmscan.c    				nr_reclaimed += shrink_zone(priority, zone, &sc);
shrink_zone      2048 mm/vmscan.c    			nr_reclaimed += shrink_zone(priority, zone, &sc);