Re: [Qemu-devel] [PATCH v2 08/18] nvdimm: init backend memory mapping and config data area

[Paolo Bonzini]

On 01/09/2015 11:14, Stefan Hajnoczi wrote:
>> > 
>> > When I was digging into live migration code, i noticed that the same MR 
>> > name may
>> > cause the name "idstr", please refer to qemu_ram_set_idstr().
>> > 
>> > Since nvdimm devices do not have parent-bus, it will trigger the abort() 
>> > in that
>> > function.
> I see.  The other devices that use a constant name are on a bus so the
> abort doesn't trigger.

However, the MR name must be the same across the two machines.  Indices
are not friendly to hotplug.  Even though hotplug isn't supported now,
we should prepare and try not to change migration format when we support
hotplug in the future.

Is there any other fixed value that we can use, for example the base
address of the NVDIMM?

Paolo