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Re: [libvirt] Improve heuristic for default guest architecture



On Fri, Mar 20, 2009 at 03:34:44PM +0100, Soren Hansen wrote:
> In libvirt 0.6.1, if you create a domain description of type 'kvm'
> without an arch set on an x86-64 host, you would get an i686 qemu guest
> rather than the expected x86-64 kvm guest.
> 
> This is because virCapabilitiesDefaultGuestArch doesn't take the domain
> type into consideration, so it just returned the first hvm architecutre
> that has been registered, which is i686.
> 
> After applying Dan P's patch, 
> 
> 	http://www.redhat.com/archives/libvir-list/2009-March/msg00281.html, 
> 
> I now get a i686 kvm guest, since kvm now can do i686 guests from
> libvirt. This is certainly an improvement, but I think a more reasonable
> default is to attempt to match the host's architecture.
> 
> This patch makes virCapabilitiesDefaultGuestArch also check the domain
> type, and also gives preference to a guest architecture that matches the
> host's architecture.

ACK, this is good - we definitely want to match native arch by default
if not specified otherwise.

Daniel
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