wakeup_kswapd
void wakeup_kswapd(struct zone *zone, gfp_t gfp_mask, int order,
wakeup_kswapd(pgdat->node_zones + z, 0,
wakeup_kswapd(zone, 0, 0, zone_idx(zone));
wakeup_kswapd(zone, gfp_mask, reclaim_order, highest_zoneidx);