can_reclaim_anon_pages
if (!sc->may_swap || !can_reclaim_anon_pages(memcg, pgdat->node_id, sc)) {
if (can_reclaim_anon_pages(NULL, zone_to_nid(zone), NULL))
if (can_reclaim_anon_pages(NULL, pgdat->node_id, sc))
if (can_reclaim_anon_pages(NULL, pgdat->node_id, sc))