[libvirt] [Xen-devel] [PATCH] libxl: Disallow save or migrate when host devices are assigned to a guest.

[Jim Fehlig]

Dario Faggioli wrote:
> On Fri, 2015-05-01 at 15:32 -0600, Jim Fehlig wrote:
>   
>> Dario Faggioli wrote:
>>     
>
>   
>>> I mean what NUMA configuration are we talking about, and when and under
>>> what circumstances would you consider it "migratable"?
>>>   
>>>       
>> E.g. if a domain is configured to use memory allocated from certain numa
>> nodes, we'd want to make sure the dest has sufficient memory amongst
>> those nodes.
>>
>>     
> Right. I was asking because I'm interested in the problem at the libxl
> level. To the best of my knowledge, I don't think we do anything like
> that in libxl for now, and I still am not sure whether we should... :-)
>
>   
>> But these were just examples of things we may want to check before
>> starting the migration.  I suppose there are better examples wrt
>> storage, e.g. does the domain have an attached DVD, ...
>>
>>     
> Exactly.
>
> Do (if you know that) other drivers in libvirt do these kind of checks?
>   

Yes.  The qemu driver has quite extensive migration checks.

Regards,
Jim