Re: [PATCH v6 11/21] virtio-net: Return an error when vhost cannot enable RSS

[Michael S. Tsirkin]

On Wed, Nov 01, 2023 at 01:50:00PM +0900, Akihiko Odaki wrote:
> We had another discussion regarding migration for patch "virtio-net: Do not
> clear VIRTIO_NET_F_HASH_REPORT". It does change the runtime behavior so we
> need to take migration into account. I still think the patch does not
> require a compatibility flag since it only exposes a new feature and does
> not prevent migrating from old QEMU that exposes less features. It instead
> fixes the case where migrating between hosts with different tap feature
> sets.

When in doubt, add a compat flag.

-- 
MST