static voidage_active_anon(struct zone *zone, struct scan_control *sc)
{
       struct mem_cgroup *memcg;
 
       if(!total_swap_pages)
              return;
 
       memcg = mem_cgroup_iter(NULL, NULL,NULL);
       do {
              struct lruvec *lruvec =mem_cgroup_zone_lruvec(zone, memcg);
 
              if (inactive_list_is_low(lruvec,false))
                     shrink_active_list(SWAP_CLUSTER_MAX,lruvec,
                                      sc, LRU_ACTIVE_ANON);
 
              memcg = mem_cgroup_iter(NULL,memcg, NULL);
       } while (memcg);
}