1473 static bool pgdat_free_space_enough(struct pglist_data *pgdat)  in pgdat_free_space_enough()  argument
1479 			   pgdat->node_present_pages >> 4);  in pgdat_free_space_enough()
1480 	for (z = pgdat->nr_zones - 1; z >= 0; z--) {  in pgdat_free_space_enough()
1481 		struct zone *zone = pgdat->node_zones + z;  in pgdat_free_space_enough()
1521 static bool numa_promotion_rate_limit(struct pglist_data *pgdat,  in numa_promotion_rate_limit()  argument
1528 	mod_node_page_state(pgdat, PGPROMOTE_CANDIDATE, nr);  in numa_promotion_rate_limit()
1529 	nr_cand = node_page_state(pgdat, PGPROMOTE_CANDIDATE);  in numa_promotion_rate_limit()
1530 	start = pgdat->nbp_rl_start;  in numa_promotion_rate_limit()
1532 	    cmpxchg(&pgdat->nbp_rl_start, start, now) == start)  in numa_promotion_rate_limit()
1533 		pgdat->nbp_rl_nr_cand = nr_cand;  in numa_promotion_rate_limit()
1534 	if (nr_cand - pgdat->nbp_rl_nr_cand >= rate_limit)  in numa_promotion_rate_limit()
1541 static void numa_promotion_adjust_threshold(struct pglist_data *pgdat,  in numa_promotion_adjust_threshold()  argument
1550 	start = pgdat->nbp_th_start;  in numa_promotion_adjust_threshold()
1552 	    cmpxchg(&pgdat->nbp_th_start, start, now) == start) {  in numa_promotion_adjust_threshold()
1555 		nr_cand = node_page_state(pgdat, PGPROMOTE_CANDIDATE);  in numa_promotion_adjust_threshold()
1556 		diff_cand = nr_cand - pgdat->nbp_th_nr_cand;  in numa_promotion_adjust_threshold()
1558 		th = pgdat->nbp_threshold ? : ref_th;  in numa_promotion_adjust_threshold()
1563 		pgdat->nbp_th_nr_cand = nr_cand;  in numa_promotion_adjust_threshold()
1564 		pgdat->nbp_threshold = th;  in numa_promotion_adjust_threshold()
1581 		struct pglist_data *pgdat;  in should_numa_migrate_memory()  local
1585 		pgdat = NODE_DATA(dst_nid);  in should_numa_migrate_memory()
1586 		if (pgdat_free_space_enough(pgdat)) {  in should_numa_migrate_memory()
1588 			pgdat->nbp_threshold = 0;  in should_numa_migrate_memory()
1595 		numa_promotion_adjust_threshold(pgdat, rate_limit, def_th);  in should_numa_migrate_memory()
1597 		th = pgdat->nbp_threshold ? : def_th;  in should_numa_migrate_memory()
1602 		return !numa_promotion_rate_limit(pgdat, rate_limit,  in should_numa_migrate_memory()