[Qemu-devel] Re: [PATCH] Revive -version 'QEMU PC Emulator...'

[Jes Sorensen]

On 05/13/10 15:04, Cole Robinson wrote:
> On 05/13/2010 04:35 AM, Jes Sorensen wrote:
>> On 05/12/10 22:48, Cole Robinson wrote:
>> I think rather than 1, it would be better to add a patch to libvirt to
>> catch both formats. I know Chris Lalancette already cooked up a patch
>> for this. Combined with the 2) patch I just posted, and 3) I think that
>> should take care of the problems.
> 
> It doesn't solve the problem for existing libvirt installations. It's
> not uncommon for users to track just the latest kvm releases without
> upgrading libvirt: any future qemu or kvm release will break every
> version of libvirt that exists today. Given that unfortunate case, I
> still recommend reverting the 'PC' change at least for long enough for a
> few fixed libvirt releases to make it into the wild.

But that is no different from what we have today. Users who update their
qemu and see issues with libvirt can also be asked to update libvirt. I
have already had several cases where I needed to do that anyway.

I don't like reverting a change like this, just to schedule it to be
reapplied again later.

Cheers,
Jes