Re: [Qemu-devel] qemu <-> libvirt interaction broken

[Gerd Hoffmann]

On 10/23/12 10:19, Peter Maydell wrote:
> On 23 October 2012 08:03, Gerd Hoffmann <address@hidden> wrote:
>> On 10/22/12 15:51, Peter Maydell wrote:
>>> On 22 October 2012 14:28, Gerd Hoffmann <address@hidden> wrote:
>>>> Commit 585f60368f23e6603cf86cfdaeceb89d1169f4b8 appearently breaks the
>>>> libvirt feature detection, my guests fail to start with this message:
>>>>
>>>> error: Failed to start domain fedora-org-virtio
>>>> error: internal error qemu does not support SGA
>>>>
>>>> Running libvirt-0.10.2-2.el6.x86_64
>>>
>>> Yeah, this is the commit that means you need an updated libvirt
>>> from this point on (and in particular for qemu-1.3).
>>
>> Well, only problem is that 0.10.2 already is the latest libvirt release.
>>  Was it really intentional to break things like this?
> 
> This change was postponed to after 1.2 was released to
> give libvirt a chance to wean itself off parsing our --help
> output.

Yea, I know this has been the plan for a long time and I agree that it
is a good move.

Only problem is that the switch didn't happen yet.  The bits might be
landed in libvirt/master, but there is no release with this yet and thus
libvirt versions using QOM for feature detection didn't find the way yet
into distributions.

IMO it is a bit early to stop caring about -help output compatibility in
qemu.

cheers,
  Gerd