Re: [RFC] Unify KVM kernel-space and user-space code into a single project

Ingo Molnar
2010-03-21T22:00:52Z

* Avi Kivity <avi@redhat.com> wrote:

> > Consider the _other_ examples that are a lot more clear:
> >
> > ' If you expose paravirt spilocks via KVM please also make sure the KVM
> > tooling can make use of it, has an option for it to configure it, and
> > that it has sufficient efficiency statistics displayed in the tool for
> > admins to monitor.'
> >
> > ' If you create this new paravirt driver then please also make sure it can
> > be configured in the tooling. '
> >
> > ' Please also add a testcase for this bug to tools/kvm/testcases/ so we dont
> > repeat this same mistake in the future. '
>
> All three happen quite commonly in qemu/kvm development. Of course someone
> who develops a feature also develops a patch that exposes it in qemu. There
> are several test cases in qemu-kvm.git/kvm/user/test.

If that is the theory then it has failed to trickle through in practice. As
you know i have reported a long list of usability problems with hardly a look.
That list could be created by pretty much anyone spending a few minutes of
getting a first impression with qemu-kvm.

So something is seriously wrong in KVM land, to pretty much anyone trying it
for the first time. I have explained how i see the root cause of that, while
you seem to suggest that there's nothing wrong to begin with. I guess we'll
have to agree to disagree on that.

Thanks,

Ingo