NSIM_RING_SIZE
.pool_size = NSIM_RING_SIZE,
NSIM_RING_SIZE - skb_queue_len(&rq->skb_queue),
NSIM_RING_SIZE / 2);
if (skb_queue_len(&rq->skb_queue) > NSIM_RING_SIZE) {
if (skb_queue_len(&rq->skb_queue) >= NSIM_RING_SIZE)