Re: [PATCH] Prevent xend from starting duplicate domains

[Anthony Liguori <aliguori@us.ibm.com>]

Dan Smith wrote:

>DH> Surely there's a race condition here? The hypervisor op that
>DH> creates a domain has to fail if it would result in two domains
>DH> with the same name; 
>
>With the same domid?  Yes.  Unless I'm completely missing something,
>the hypervisor knows nothing of the *names* of the domains.
>  
>
The hypervisor has no concept of domain names.  That's entirely a Xend 
construct.  The same applies to UUIDs.

Even if there are two domains with the same name, they have different 
domain IDs which is okay from the hypervisor's perspective.

>Am I wrong?
>
>DH> this can't be reliably enforced by a separate check in the Python
>DH> tools.
>
>Going on the assumption that the names are known only to the tools, I
>think the tools are the best place to perform the check.
>
>  
>
Regards,

Anthony Liguori