Hi Jason, > From: Jason Wang <jasow...@redhat.com> > Sent: Monday, December 5, 2022 10:25 PM
> > A dumb question, any reason we need bother with virtio-net? It looks to me > it's > not a must and would complicate migration compatibility. Virtio net vdpa device is processing the descriptors out of order. This vdpa device doesn’t offer IN_ORDER flag. And when a VQ is suspended it cannot complete these descriptors as some dummy zero length completions. The guest VM is flooded with [1]. So it is needed for the devices that doesn’t offer IN_ORDER feature. [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/net/virtio_net.c?h=v6.2-rc3#n1252
