On 22 Sep 2014, at 16:44, Paolo Bonzini <pbonzini@redhat.com> wrote:
time, RHEL7 did it. Ubuntu didn't, and probably neither did Debian.
This patch singles out pc-1.0 just because it used to be the default in Ubuntu 12.04. So basically it's making upstream carry the burden of a decision of the Ubuntu folks. It's understandable that Alex disagrees with the decision, but nevertheless it's not something that upstream should agree with.
Also, another horse that has left the barn: it's already too late to apply this patch to upstream Ubuntu. If you do that, any machine created with 12.04 and reused with 14.04 will fail to migrate to another 14.04 machine that includes this patch, as I understand it.
So as things stand, I don't see a reason to apply this patch upstream.
Well, Ubuntu (Serge I think) said in the Ubuntu bug report he'd be quite willing to break migration of pc-1.0 machine types from 14.04 to 14.04 because that machine type isn't the default anyway on 14.04. But that isn't the point, as the patch (as a whole) doesn't break anything - it merely gives the possibility to import pc-1.0 machines from qemu-kvm. That's useful even if you build qemu from source every time. Or were you just arguing against the ./configure option? -- Alex Bligh