在 2021/6/10 下午4:22, Xuan Zhuo 写道:
Compared to the case of xsk tx, the case of xsk zc rx is more
complicated.
When we process the buf received by vq, we may encounter ordinary
buffers, or xsk buffers. What makes the situation more complicated is
that in the case of mergeable, when num_buffer > 1, we may still
encounter the case where xsk buffer is mixed with ordinary buffer.
Another thing that makes the situation more complicated is that when we
get an xsk buffer from vq, the xsk bound to this xsk buffer may have
been unbound.
Signed-off-by: Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx>
This is somehow similar to the case of tx where we don't have per vq reset.
[...]
- if (vi->mergeable_rx_bufs)
+ if (is_xsk_ctx(ctx))
+ skb = receive_xsk(dev, vi, rq, buf, len, xdp_xmit, stats);
+ else if (vi->mergeable_rx_bufs)
skb = receive_mergeable(dev, vi, rq, buf, ctx, len, xdp_xmit,
stats);
else if (vi->big_packets)
@@ -1175,6 +1296,14 @@ static bool try_fill_recv(struct virtnet_info *vi, struct receive_queue *rq,
int err;
bool oom;
+ /* Because virtio-net does not yet support flow direct,
Note that this is not the case any more. RSS has been supported by
virtio spec and qemu/vhost/tap now. We just need some work on the
virtio-net driver part (e.g the ethool interface).
Thanks
