Re: [Xen-devel] [PATCH 5/6] libxl: allow a generation ID to be specified at domain creation

[David Vrabel <david.vrabel@xxxxxxxxxx>]

On 10/06/14 12:01, Ian Campbell wrote:
> On Tue, 2014-06-03 at 14:15 +0100, David Vrabel wrote:
>> Toolstacks may specify a VM generation ID using the
>> u.hvm.generation_id field into libxl_domain_build_info structure, when
>> creating a domain.
>>
>> The toolstack is responsible for providing the correct generation ID
>> according to the Microsoft specification (e.g., generating new random
>> ones as appropriate when restoring).
> 
> Any reason not to make the libxl interface a (def)bool and have libxl
> generate a suitable ID internally? Does anything ever care about the
> specific UUID?

Other toolstacks (like xapi) have a better idea of the life-cycle of a
VM than xl does and thus need only use a new ID for snapshots -- they
can retain the same ID if the domain is just rebooted/migrated.

David

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