On Wed, Mar 29, 2017 at 03:38:09PM +0300, Michael S. Tsirkin wrote:
> If one enables e.g. jumbo frames without mergeable
> buffers, packets won't fit in 1500 byte buffers
> we use. Switch to big packet mode instead.
> TODO: make sizing more exact, possibly extend small
> packet mode to use larger pages.
>
> Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
Fixes: 14de9d114a82 ("virtio-net: Add initial MTU advice feature")
> ---
> drivers/net/virtio_net.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
> index e0fb3707..9dc31dc 100644
> --- a/drivers/net/virtio_net.c
> +++ b/drivers/net/virtio_net.c
> @@ -2428,6 +2428,10 @@ static int virtnet_probe(struct virtio_device *vdev)
> dev->mtu = mtu;
> dev->max_mtu = mtu;
> }
> +
> + /* TODO: size buffers correctly in this case. */
> + if (dev->mtu > ETH_DATA_LEN)
> + vi->big_packets = true;
> }
>
> if (vi->any_header_sg)
> --
> MST
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