XDP_RING_NEED_WAKEUP
xs->tx->ring->flags |= XDP_RING_NEED_WAKEUP;
pool->fq->ring->flags |= XDP_RING_NEED_WAKEUP;
xs->tx->ring->flags |= XDP_RING_NEED_WAKEUP;
pool->fq->ring->flags &= ~XDP_RING_NEED_WAKEUP;
xs->tx->ring->flags &= ~XDP_RING_NEED_WAKEUP;
return *r->flags & XDP_RING_NEED_WAKEUP;