[pve-devel] [RFC qemu-server++ 0/22] remote migration

Dominik Csapak d.csapak at proxmox.com
Wed May 5 11:22:35 CEST 2021


On 5/5/21 08:02, aderumier at odiso.com wrote:
> Hi Moula,
> 
> local device migration is not related to this remote migration serie,
> but maybe some improvement could be done.
> 
> I'm think about usb device, where we could have the same device on
> multiple hosts. (like a security dongle for example).
> 
> I think for usb we should be able to detach/migrate/rettach. (it should
> work for stateless device, but not a usb drive for example)
> 
> Maybe for local nic pci passthroug too.
> 
> But for gpu I'm really not sure it's possible, if you have some data in
> the local gpu memory, I don't see how it's possible to get it working.
> 
> Do you known an hypervisor with this kind of gpu migration
> implementation ?
> 

afaik, this is being worked on in qemu/kvm but needs hardware support,
i.e. you can dump the internal state of a supported pci device,
and migrate it to the target

will probably still take a while until normal (non big datacenter)
customers can use this...




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