linux-kernel - Re: [PATCH 2/2] locking: Apply contention tracepoints in the slow path

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Message-ID: <CAM9d7ciG3Oq7VutnRpzDLqA0Cbkg=D8Aw_Gv1gC+F7+haSzf-g@mail.gmail.com>
Date:   Tue, 22 Mar 2022 09:39:44 -0700
From:   Namhyung Kim <namhyung@...nel.org>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Boqun Feng <boqun.feng@...il.com>,
        Ingo Molnar <mingo@...nel.org>, Will Deacon <will@...nel.org>,
        Waiman Long <longman@...hat.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Byungchul Park <byungchul.park@....com>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Arnd Bergmann <arnd@...db.de>,
        Radoslaw Burny <rburny@...gle.com>,
        linux-arch <linux-arch@...r.kernel.org>,
        bpf <bpf@...r.kernel.org>
Subject: Re: [PATCH 2/2] locking: Apply contention tracepoints in the slow path

On Tue, Mar 22, 2022 at 5:59 AM Steven Rostedt <rostedt@...dmis.org> wrote:
>
> On Mon, 21 Mar 2022 22:31:30 -0700
> Namhyung Kim <namhyung@...nel.org> wrote:
>
> > > Thanks for the info.  But it's unclear to me if it provides the custom
> > > event with the same or different name.  Can I use both of the original
> > > and the custom events at the same time?
>
> Sorry, missed your previous question.

No problem!

>
> >
> > I've read the code and understood that it's a separate event that can
> > be used together.  Then I think we can leave the tracepoint with the
> > return value and let users customize it for their needs later.
>
> Right, thanks for looking deeper at it.

And thanks for your review.  I'll post a v4 soon.

Thanks,
Namhyung