linux-kernel - Re: [PATCH v1 00/18] KVM selftests code consolidation and cleanup

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Date:   Thu, 27 Oct 2022 09:24:17 -0700
From:   David Matlack <dmatlack@...gle.com>
To:     Sean Christopherson <seanjc@...gle.com>
Cc:     "Wang, Wei W" <wei.w.wang@...el.com>,
        "pbonzini@...hat.com" <pbonzini@...hat.com>,
        "vipinsh@...gle.com" <vipinsh@...gle.com>,
        "ajones@...tanamicro.com" <ajones@...tanamicro.com>,
        "eric.auger@...hat.com" <eric.auger@...hat.com>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1 00/18] KVM selftests code consolidation and cleanup

On Thu, Oct 27, 2022 at 8:44 AM Sean Christopherson <seanjc@...gle.com> wrote:
>
> On Thu, Oct 27, 2022, Wang, Wei W wrote:
> > On Thursday, October 27, 2022 5:23 AM, David Matlack:
> > > I haven't dug too much into the actual code yet, but I have some high level
> > > feedback based on a quick look through the series:
> > >
> > >  - Use the format "KVM: selftests: <Decsription>" for the shortlog.
> >
> > I know it's not common to see so far, but curious is this the required format?
>
> It's definitely the preferred format.
>
> > I didn't find where it's documented.
>
> Heh, for all shortlog scopes, the "documentation" is `git log --pretty=oneline` :-)
>
> > If it's indeed a requirement, probably we also need to enhance checkpatch.pl
> > to detect this.
>
> I like the idea in theory, but that'd be a daunting task to set up, and quite the
> maintenance nightmare.  There are probably thousands of file => scope mappings
> throughout the kernel, with any number of exceptions and arbitrary rules.

I was thinking about proposing this in checkpatch.pl, or in some
KVM-specific check script. It seems like the following rule: If a
commit only modifies files in tools/testing/selftests/kvm/*, then
requires the shortlog match the regex "KVM: selftests: .*". That would
handle the vast majority of cases without affecting other subsystems.

Sean are you more concerned that if we start validating shortlogs in
checkpatch.pl then eventually it will get too out of hand? (i.e. not
so concerned with this specific case, but the general problem?)

Either way, we should at least document the preferred KVM shortlog
styles in Documentation/virtual/kvm/.