RE: [virtio-dev] RE: RE: RE: RE: [PATCH v16] virtio-net: support device stats

[Parav Pandit <parav@nvidia.com>]

> From: Michael S. Tsirkin <mst@redhat.com>
> Sent: Monday, September 4, 2023 6:58 PM

> > So counter looks ok to me when VIRTIO_NET_F_MTU is not negotiated or
> > when mtu matches.
> 
> If someone misconfigures the LAN with different devices using different MTU
> values .... all bets are off. OK we can put something in spec e.g. for debugging
> but really just don't do this.
> 
True. When all the entities exactly know everything, gso_size <= mtu can be omitted.
When such things are unknown it is needed.

> > > >
> > > > Each packet must be 1500 for the mtu normative above.
> > > > gso_size to <= mtu (ingoring the hdr math for simplicity for now).
> > > > whole GSO completion can be for 64K to be reported in used_elem.len.
> > > >
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