pgdatfree        2358 mm/vmscan.c    		unsigned long pgdatfree;
pgdatfree        2362 mm/vmscan.c    		pgdatfree = sum_zone_node_page_state(pgdat->node_id, NR_FREE_PAGES);
pgdatfree        2374 mm/vmscan.c    		if (unlikely(pgdatfile + pgdatfree <= total_high_wmark)) {