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

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Message-ID: <Yw5I3P4Vs5GGBtuJ@google.com>
Date:   Tue, 30 Aug 2022 17:29:00 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Like Xu <like.xu.linux@...il.com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Jim Mattson <jmattson@...gle.com>,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Subject: Re: [PATCH RESEND v2 0/8] x86/pmu: Corner cases fixes and
 optimization

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@tencent.com/
> https://lore.kernel.org/kvm/20220803130124.72340-1-likexu@tencent.com/
> 
> 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.