Re: [Xen-devel] [PATCH] [RFC] Intercept some xm commands on HVM

[Ewan Mellor <ewan@xxxxxxxxxxxxx>]

On Fri, Oct 20, 2006 at 05:12:36PM -0400, Stefan Berger wrote:

> Hello!
> 
>  I find some of the xm commands when applied to an HVM domain
> misleading:
> 
> xm shutdown                 - behaves like 'xm destroy' unlike the
>                               paravirtualized case that gracefully
>                               shuts down a domain; use 'destroy' instead
>                               for HVM
> xm migrate / save           - returns                      
>                               Error: /usr/lib/xen/bin/xc-save ... failed
> 
>  The attached patch intercepts only those commands now and returns a
> 'better' message.

These commands aren't necessarily unsupported for HVM domains -- they need PV
driver support, but that's not a fundamental limitation.  We need a decent
mechanism for guest capability interrogation, that's for sure, so that we can
give better diagnostics; I'd like to see this mechanism in Xen 3.0.4.  For
now, I don't think we can reject these commands unconditionally.

Ewan.

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