Re: About creating machines on the command line

["Daniel P. Berrangé" <berrange@redhat.com>]

On Thu, Jan 14, 2021 at 06:11:50PM +0100, Kashyap Chamarthy wrote:
> On Thu, Jan 14, 2021 at 11:37:06AM +0000, Daniel P. Berrangé wrote:
> > On Mon, Jan 11, 2021 at 03:50:58PM +0100, Luc Michel wrote:
> 
> [...]
> 
> > > This would hopefully allow for simple machines creation. We would then be
> > > able to use either the command line or the `-readconfig` option to create
> > > the machine.
> > > 
> > > Note that we are not planning to use QMP/HMP for now. From our
> > > understanding, a `device_add` request is always considered as hot-plug,
> > > which is not what we want here.
> > > 
> > > Please tell us what do you think about this plan. Any feedback is
> > > appreciated.  Then we can discuss the details of how to do this properly.
> > 
> > There's a general desire amongst QEMU maintainers to move to a world
> > where QAPI is used for describing everything. In this vision, eventually
> > all current command line options would be replaced with QMP commands
> > and QAPI objects specs.
> > 
> > In this world -readconfig is likely to be deleted. 
> 
> In that case, I hope the above intention / direction will be documented
> somewhere more clearly.  In the past I ran into at least a couple of
> companies that use QEMU in production and heavily rely on '-readconfig',
> despite knowing some of its shortcomings.  There might be others out
> there.

Such a change would go through the deprecation process as normal so
they would have 2 releases prior warning.

Regards,
Daniel
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