[libvirt] how to pass qemu options?

[Daniel P. Berrange]

On Thu, May 15, 2008 at 08:55:25PM +0200, Gerd Hoffmann wrote:
> Daniel P. Berrange wrote:
> >> is required for any serious development work.  I *hate* to having to
> >> create a wrapper script each time I need to pass in additional
> >> parameters, and I'd *love* to see libvirt being a bit more developer
> >> friendly.
> > 
> > Historically we've not had very complete coverage of QEMU args, but we've
> > been adding alot of new functionality recently so the need for extra args
> > is reducing all the time. We recently added serial, parallel, sound and
> > drive support. USB is the next on the list at which point we basically 
> > have coverage of all the important options we should reasonably expect.
> 
> Maybe for normal users.  Certainly not for developers.  I need stuff
> like raising debug level for more verbose logs, enable experimental
> features while working on them and similar stuff.  Nothing which I'd
> expect libvirt to support directly.
> 
> > Creating wrapper scripts for experimentation is not that difficult.
> 
> But it is quite inconvenient.
> 
> And it also proves that you can't prevent users from passing additional
> args to qemu, thereby creating unsupported configurations.  So what was
> the point in refusing <emulator args="-foo">...</emulator> support?

There is a vast difference between having to go *outside* the API to add
extra args, vs supporting it directly in the XML format. 

Dan.
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