Re: [virtio-comment] [PATCH 1/1] live_migration: initial support for migrating virtio devices

[Max Gurtovoy <mgurtovoy@nvidia.com>]

On 7/7/2021 5:09 PM, Michael S. Tsirkin wrote:
> On Wed, Jul 07, 2021 at 03:51:25PM +0300, Max Gurtovoy wrote:
> > > > +This document will describe the needed updates to the virtio
> > > > specification for adding live migration support for various
> > > > devices. Live migration is one of the most important features of
> > > > virtualization and virtio devices are oftenly found in virtual
> > > > environments so setting a standard mechanism for this feature will
> > > > allow virtio providers to develop compliant devices that will use
> > > > standard drivers for that matter.
> > > Is this supposed to happen on the device side? Do drivers need to get
> > > involved, or is it transparent to them?
> > Guest drivers should be involved.
> Hmm that's a big drawback of this design then.

sorry it was a typo :)

Guest drivers *shouldn't* be involved.

of course.


> If nothing else, it should be possible to get state from device and
> replace it with an emulated software implementation
> for duration of migration, transparently to guest drivers.