linux-kernel - Re: [GIT PULL] perf fixes

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Message-ID: <CAHk-=wgO0KzB-j8_1GAwkM68nLiWNsK6s1FBXKqKj_62VtDMMQ@mail.gmail.com>
Date:   Tue, 17 Dec 2019 11:06:00 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Arnaldo Carvalho de Melo <acme@...radead.org>,
        Jiri Olsa <jolsa@...hat.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Thomas Gleixner <tglx@...utronix.de>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [GIT PULL] perf fixes

On Tue, Dec 17, 2019 at 3:34 AM Ingo Molnar <mingo@...nel.org> wrote:
>
> Note that the large CPU count related fixes go beyond regression fixes -
> but the IPI-flood symptoms are severe enough that I think justifies their
> inclusion. If it's too much we'll redo the branch.

I'm much less sensitive to the perf _tooling_ changes than I am to
actual kernel code changes.

Of course, if you start having a history of breaking things during the
rc kernels, that may change, but at least for now, I tend to look at
diffstats and go "oh, this is perf tooling", and not worry too much
about it...

                     Linus