sum_zone_node_page_state
nid, K(sum_zone_node_page_state(nid, NR_MLOCK)));
nid, K(sum_zone_node_page_state(nid, NR_UNACCEPTED))
sum_zone_node_page_state(nid, i));
extern unsigned long sum_zone_node_page_state(int node,
val->freeram = sum_zone_node_page_state(nid, NR_FREE_PAGES);
free = sum_zone_node_page_state(pgdat->node_id, NR_FREE_PAGES);