Snapshot blocked by pci-e device

[slole]

I am considering proxmox as a hypervisor for my home PC and I when I was testing, I tried to make a snapshot of a virtual machine with a GPU attached. Peoxmox gave me the following error: VM 100 qmp command 'savevm-start' failed - State blocked by non-migratable device '0000:00:1c.0:00.0/vfio-pci'.

I mostly want this functionality so I can "freeze" a VM, free the resources and open up a different one, without fully shutting down a VM.

Thank you for any responses

 

[dcsapak]

you cannot snapshot a vm with a passthrough device since we also have to save the internal state of the devices, which is currently not possible with real pci devices

 

[slole]

Can I then somehow enable guest-side hibernation? In virsh this can be done by modifying these properties in the xml config: <pm> <suspend-to-mem enabled='yes'/> <suspend-to-disk enabled='yes'/> </pm>

 

[dcsapak]

you can either suspend from within, or use the qemu guest agent with 'qm guest cmd ID suspend-disk'

 

[slole]

So suspending to disk is enabled by default?

 

[dcsapak]

So suspending to disk is enabled by default?

what do you mean? if your guest supports it you can do it, but this requires configuration in the guest normally

 

[slole]

what do you mean? if your guest supports it you can do it, but this requires configuration in the guest normally

I was just refering to the fact that this functionaity has to be enabled in virsh.
Thanks for the help.