On Thu, Oct 12, 2023 at 11:47:05AM +0000, Parav Pandit wrote:
>
> > From: <-
> > open.org> On Behalf Of Michael S. Tsirkin
> > Sent: Thursday, October 12, 2023 4:48 PM
> > On Thu, Oct 12, 2023 at 10:58:14AM +0000, Parav Pandit wrote:
> > > Sure, as I explained the config register method do not work for passthrough
> > mode, and does not scale.
> >
> > And on the flip side, to be frank not everyone has huge guests and numbers of
> > VMs and a slower memory mapped interface for small devices might make
> > sense. What we need to do though is make this a small non-intrusive part since
> > it's not clear such embedded cases even need live migration.
>
> I almost sure, I am misunderstanding your point.
>
> If the VM is small who may not need a performance, may be hypervisor can just offer
> VIRTIO_NET_F_STANDBY.
>
> I recollect we even accelerated VIRTIO_NET_F_STANDBY flow as well.
standby hack is frankly problematic in that vm can not just be
migrated at any time.
