Re: [Qemu-devel] [PATCH 01/11] QMP: Introduce specification file

[Anthony Liguori]

Avi Kivity wrote:
> > I'd rather not do json.
>
> Why not?

Because it's too much complexity at this level in the stack.

> > As they stand, I think the current patch set is very close to being 
> > mergable.  I'd rather not go off on a new tangent.
>
> It fulfils all are requirements and more.  There's a C implementation 
> available.  We can concentrate on the commands and ignore the plumbing.

The same is true for XML-RPC, CIM, dbus, etc.  RPC grow like weeds.  In 
5 years, it will be shocking that qemu uses jsonrpc instead of the next 
super-neat RPC protocol.

If we did a real RPC mechanism, I'd want to stick with something 
tried-and-true like XDR.  But an RPC mechanism is not the monitor.  If 
we were going to do that, there's no point in morphing the monitor into 
that.

What we're doing here is adding a computer-mode to the existing 
monitor.  This will be easy for current apps to consume and for us to 
transition the code base to.  It's a safe and incremental improvement.

I don't want to invent Xen-API here and go through that pain in QEMU.

--
Regards,

Anthony Liguori