RTE_PKTMBUF_HEADROOM - vq->hw->vtnet_hdr_size;
start_dp[i].len = sw_ring[i]->buf_len -
RTE_PKTMBUF_HEADROOM + vq->hw->vtnet_hdr_size;
RTE_PKTMBUF_HEADROOM - vq->hw->vtnet_hdr_size;
start_dp[i].len = sw_ring[i]->buf_len -
RTE_PKTMBUF_HEADROOM + vq->hw->vtnet_hdr_size;