VMSCAN_THROTTLE_NOPROGRESS
#define _VMSCAN_THROTTLE_NOPROGRESS (1 << VMSCAN_THROTTLE_NOPROGRESS)
case VMSCAN_THROTTLE_NOPROGRESS:
wqh = &pgdat->reclaim_wait[VMSCAN_THROTTLE_NOPROGRESS];
reclaim_throttle(pgdat, VMSCAN_THROTTLE_NOPROGRESS);