Re: [Qemu-devel] migration: new sections and backward compatibility.

[Jes Sorensen]

On 07/07/11 09:30, Avi Kivity wrote:
> On 07/07/2011 10:14 AM, Gerd Hoffmann wrote:
>>> Can't we just implicitly fail migration whenever there's a device in
>>> the tree that doesn't have VMSTATE?
>>
>>
>> There are cases where the device doesn't need to save state, so that
>> alone doesn't cut it.
> 
> It should then say so by having an empty VMSTATE descriptor.

It seems reasonable to me to introduce a situation where devices have to
explicitly marked as migration compatible and fail if there are devices
in the system which are not.

Even for the case like USB devices where migration might simply force a
replug of the devices.

Cheers,
Jes