Re: [Qemu-devel] [PATCH 19/22] qapi: add QMP put-event command

[Avi Kivity]

On 03/10/2011 06:42 PM, Anthony Liguori wrote:
> > > Maybe for QMPv2, but for QMPv1, this is going to introduce an 
> > > extremely incompatible change.
> >
> > Why?  It's 100% backwards compatible.
>
>
> It's a very significant change for clients.  While technical 
> compatible, it would require a change to the client infrastructure to 
> support the new feature.

Yes.  That's generally a good thing, you implement something at the 
infrastructure level once instead of at a higher level N times.


> I'm not saying we shouldn't make a change like this, but we should 
> minimize these type of changes.

I agree, so we should design the protocol well, without planned 
obsolescence.  We'll make some mistakes, but at least they'll be unplanned.

--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.