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On Thu, Sep 02, 2021 at 05:52:38PM +0200, Christophe de Dinechin wrote:
> 
> 
> > On 1 Sep 2021, at 12:05, David Gibson <kata-dev at gibson.dropbear.id.au> wrote:
> > 
> > On Wed, Sep 01, 2021 at 11:43:59AM +0200, Christophe de Dinechin wrote:
> >> [resend with cut quote, original was held in moderation for being > 40K]
> >> 
> >>> On 31 Aug 2021, at 12:31, David Gibson <kata-dev at gibson.dropbear.id.au> wrote:
> >>> 
> >>> On Tue, Aug 31, 2021 at 09:23:04AM +0200, Fabiano Fidêncio wrote:
> >>>> On Tue, Aug 31, 2021 at 5:16 AM David Gibson
> >>>> <kata-dev at gibson.dropbear.id.au> wrote:
> >>>>> 
> >>>>> On Mon, Aug 30, 2021 at 01:24:20PM +0200, Fabiano Fidêncio wrote:
> >>>>>> David,
> >>>>>> 
> >>> 
> >>>> Then we will have an one not small patch removing the govmm vendor.
> >>> 
> >>> So, I'd be happy enough with this approach if we could incrementally
> >>> introduce the new interface then drop govmm once the new interface
> >>> covers everything.
> >>> 
> >>> Unfortunately, that doesn't really work, because govmm owns the qmp
> >>> interface and the qemu command line, so we can't build a new interface
> >>> "bottom up".
> >> 
> >> While we are at it, should we rename "govmm" to something that indicates
> >> it's really specific to qemu?
> > 
> > Fwiw, my draft PR simply calls it the "qemu" package in the imported copy.
> > 
> >> Or do we want to take the opposite route
> >> (which was evoked yesterday) to move to VMM the "hypervisor" abstraction
> >> that we have in Kata?
> > 
> > I'm not really sure what you're suggesting here.
> 
> If govmm is a bad hypervisor abstraction, but we have a slightly better one in Kata
> (i.e. hypervisor.go and the various hypervisor back-ends), then maybe we should
> rather turn govmm into the hypervisor abstraction it was supposed to
> be.

hypervisor.go is a better hypervisor abstraction *for the purpose*.
Which is specifically to suit Kata's needs.  It's not a viable
hypervisor abstraction for anyone else.

> But that's clearly more complicated.

I think that's underselling it.  Making a general purpose hypervisor
abstraction is an immensely difficult problem.  I know I sound like
a broken record here, but that's been libvirt's entire thing for a
decade, and they've at best partially succeeded.

Making an general purpose interface purely for qemu is much more
practical.. but I still think it's more than the Kata project has
spare capacity to take on.  And, in this case, it's not very clear
exactly what you're abstracting.

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson
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