pfmemalloc_reserve 3135 mm/vmscan.c    	unsigned long pfmemalloc_reserve = 0;
pfmemalloc_reserve 3151 mm/vmscan.c    		pfmemalloc_reserve += min_wmark_pages(zone);
pfmemalloc_reserve 3156 mm/vmscan.c    	if (!pfmemalloc_reserve)
pfmemalloc_reserve 3159 mm/vmscan.c    	wmark_ok = free_pages > pfmemalloc_reserve / 2;