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Subject: Re: [virtio-comment] [PATCH v1 1/8] admin: Add theory of operation for device migration
On Fri, Oct 13, 2023 at 09:15:31AM +0800, Jason Wang wrote: > > > 1) Only works for SR-IOV member device like VF > > It can be extended to SIOV member device in future. > > Today these are the only type of member device virtio has. > > That is exactly what I want to say, it can only work for the > owner/member model. It can't work when the virtio device is not > structured like that. And you missed that most of the existing virtio > devices are not implemented in this model. It means they can't be > migrated with a pure virtio specific extension. For you, SR-IOV is all > but this is not true for virtio. PCI is not the only transport and > SR-IOV is not the only architecture in PCI. Original version of admin command work supported another group type including just the device itself. In the end these commands are just a level of indirection. Using them for migration was explicitly listed as a use case when they were introduced.
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