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Date: Fri, 14 May 2010 09:52:53 -0500
From: Anthony Liguori <anthony@codemonkey.ws>
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Subject: Re: [Qemu-devel] Re: [PATCH] Revive -version 'QEMU PC Emulator...'
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To: "Daniel P. Berrange" <berrange@redhat.com>
Cc: Anthony Liguori <aliguori@linux.vnet.ibm.com>, Cole Robinson <crobinso@redhat.com>, clalance@redhat.com, qemu-devel@nongnu.org, Jes Sorensen <Jes.Sorensen@redhat.com>

On 05/14/2010 09:42 AM, Daniel P. Berrange wrote:
>
> It is preferable to query the explicit capability wanted, because
> version numbers are useless when distros backport features,

Unless distros add their own release number to the version information 
and libvirt learns about the features they add.

I think that's the sanest approach.  Just because a distro backports a 
feature doesn't mean that it behaves like the upstream version.  libvirt 
really needs to treat distro packages as separate entities from upstream 
IMHO.

Regards,

Anthony Liguori

>   and
> when kvm is using kvm-XXX numbering that's completely unrelated
> to the qemu-X.Y.Z numbering. Version numbers are the last resort
> if there's no alternative way to determine the capability
>
>
> Daniel
>