Re: [PATCH RESEND v2 0/8] x86/pmu: Corner cases fixes and optimization

[Like Xu]

On 31/8/2022 1:29 am, Sean Christopherson wrote:
> On Tue, Aug 23, 2022, Like Xu wrote:
> > Good well-designed tests can help us find more bugs, especially when
> > the test steps differ from the Linux kernel behaviour in terms of the
> > timing of access to virtualized hw resources.
> >
> > In this patch series, there are three small optimization (006/007/008),
> > one hardware surprise (001), and most of these fixes have stepped
> > on my little toes.
> >
> > Please feel free to run tests, add more or share comments.
> >
> > Previous:
> > https://lore.kernel.org/kvm/20220721103549.49543-1-likexu@xxxxxxxxxxx/
> > https://lore.kernel.org/kvm/20220803130124.72340-1-likexu@xxxxxxxxxxx/
> >
> > V2 -> V2 RESEND Changelog:
> > - The "pebs_capable" fix has been merged into tip/perf/tree tree;
> > - Move the other two AMD vPMU optimization here;
>
> This is not a RESEND.  These things very much matter because I'm sitting here
> trying to figure out whether I need to review this "v2", which is really v3, or
> whether I can just review the real v2.
>
>    Don't add "RESEND" when you are submitting a modified version of your
>    patch or patch series - "RESEND" only applies to resubmission of a
>    patch or patch series which have not been modified in any way from the
>    previous submission.

Roger that. Thanks for your detailed comments and all of that will be applied in V3.

The new AMD vPMU testcases[1] will also help guard future related changes.
[1] https://lore.kernel.org/kvm/20220819110939.78013-1-likexu@xxxxxxxxxxx/

Thanks,
Like Xu