Remove these unnecessary vring descriptor length updating, vhost should not change them. virtio in front end should assign value to desc.len for both rx and tx.
Signed-off-by: Changchun Ouyang <changchun.ouyang at intel.com> --- lib/librte_vhost/vhost_rxtx.c | 18 +----------------- 1 file changed, 1 insertion(+), 17 deletions(-) diff --git a/lib/librte_vhost/vhost_rxtx.c b/lib/librte_vhost/vhost_rxtx.c index 5c31a88..07bc16c 100644 --- a/lib/librte_vhost/vhost_rxtx.c +++ b/lib/librte_vhost/vhost_rxtx.c @@ -137,7 +137,6 @@ virtio_dev_rx(struct virtio_net *dev, uint16_t queue_id, */ if ((desc->flags & VRING_DESC_F_NEXT) && (desc->len == vq->vhost_hlen)) { - desc->len = vq->vhost_hlen; desc = &vq->desc[desc->next]; /* Buffer address translation. */ buff_addr = gpa_to_vva(dev, desc->addr); @@ -291,7 +290,6 @@ copy_from_mbuf_to_vring(struct virtio_net *dev, uint16_t res_base_idx, if (vb_avail == 0) { uint32_t desc_idx = vq->buf_vec[vec_idx].desc_idx; - vq->desc[desc_idx].len = vq->vhost_hlen; if ((vq->desc[desc_idx].flags & VRING_DESC_F_NEXT) == 0) { @@ -375,7 +373,6 @@ copy_from_mbuf_to_vring(struct virtio_net *dev, uint16_t res_base_idx, */ uint32_t desc_idx = vq->buf_vec[vec_idx].desc_idx; - vq->desc[desc_idx].len = vb_offset; if ((vq->desc[desc_idx].flags & VRING_DESC_F_NEXT) == 0) { @@ -410,26 +407,13 @@ copy_from_mbuf_to_vring(struct virtio_net *dev, uint16_t res_base_idx, /* * This whole packet completes. */ - uint32_t desc_idx = - vq->buf_vec[vec_idx].desc_idx; - vq->desc[desc_idx].len = vb_offset; - - while (vq->desc[desc_idx].flags & - VRING_DESC_F_NEXT) { - desc_idx = vq->desc[desc_idx].next; - vq->desc[desc_idx].len = 0; - } - /* Update used ring with desc information */ vq->used->ring[cur_idx & (vq->size - 1)].id = vq->buf_vec[vec_idx].desc_idx; vq->used->ring[cur_idx & (vq->size - 1)].len = entry_len; - entry_len = 0; - cur_idx++; entry_success++; - seg_avail = 0; - cpy_len = RTE_MIN(vb_avail, seg_avail); + break; } } } -- 1.8.4.2