LRU_ACTIVE
lru += LRU_ACTIVE;
lru += LRU_ACTIVE;
__update_lru_size(lruvec, lru + LRU_ACTIVE, zone, delta);
lru += LRU_ACTIVE;
LRU_ACTIVE_ANON = LRU_BASE + LRU_ACTIVE,
LRU_ACTIVE_FILE = LRU_BASE + LRU_FILE + LRU_ACTIVE,
enum lru_list active_lru = inactive_lru + LRU_ACTIVE;
lru += LRU_ACTIVE;
__update_lru_size(lruvec, lru + LRU_ACTIVE, zone, -delta);
nr[lru + LRU_ACTIVE] = 0;
lru += LRU_ACTIVE;