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Subject: RE: [virtio-comment] [PATCH v1 1/8] admin: Add theory of operation for device migration

> From: virtio-comment@lists.oasis-open.org <virtio-comment@lists.oasis-
> 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

I recollect we even accelerated VIRTIO_NET_F_STANDBY flow as well.

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