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Re: [Xen-devel] [RFC] When to use "domain creation flag" or "HVM param"?

>>> On 24.02.15 at 11:24, <tim@xxxxxxx> wrote:
> At 15:08 -0500 on 23 Feb (1424700515), Don Slutz wrote:
>> Currently Jan Beulich is not happy with the addition of a new domain
>> creation flag.  Andrew Cooper is not happy with a HVM param.  I am stuck
>> in the middle.
> I prefer a new flag, for anything that's fixed for the life of the
> domain.  We've already had too many bugs where HVM params changed
> when people thought they wouldn't.
> Jan, is your objection that we'll run out of XEN_DOMCTL_CDF_* bits?  I
> think we can add more flag fields to DOMCTL_createdomain (or a v2) if
> that becomes a problem.

In a couple of years we may end up with an x86-CPUID-like mess
of hundreds of flags. And apart from that scalability issue I also
dislike the gross mixing of arch specific and generic flags here.
Perhaps the already arch-specific XEN_DOMCTL_configure_domain
would be the better route then if HVM params are being disliked?


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