linux-kernel - Re: [PATCH v3 0/5] RCU dyntick nesting counter cleanups for rcu -dev

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Date:   Mon, 4 May 2020 14:18:50 -0400
From:   Joel Fernandes <joelaf@...gle.com>
To:     paulmck@...nel.org
Cc:     "Joel Fernandes (Google)" <joel@...lfernandes.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Andy Lutomirski <luto@...nel.org>,
        Frederic Weisbecker <fweisbec@...il.com>,
        Amol Grover <frextrite@...il.com>,
        Ingo Molnar <mingo@...hat.com>,
        Josh Triplett <josh@...htriplett.org>,
        "Cc: Android Kernel" <kernel-team@...roid.com>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        Madhuparna Bhowmik <madhuparnabhowmik04@...il.com>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Petr Mladek <pmladek@...e.com>, rcu@...r.kernel.org,
        Steven Rostedt <rostedt@...dmis.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Vineeth Remanan Pillai <vpillai@...italocean.com>
Subject: Re: [PATCH v3 0/5] RCU dyntick nesting counter cleanups for rcu -dev

On Mon, May 4, 2020 at 1:44 PM Paul E. McKenney <paulmck@...nel.org> wrote:
>
> On Mon, May 04, 2020 at 10:15:32AM -0700, Paul E. McKenney wrote:
> > On Mon, May 04, 2020 at 08:05:00AM -0400, Joel Fernandes (Google) wrote:
> > > These patches clean up the usage of dynticks nesting counters simplifying the
> > > code, while preserving the usecases.
> > >
> > > It is a much needed simplification, makes the code less confusing, and prevents
> > > future bugs such as those that arise from forgetting that the
> > > dynticks_nmi_nesting counter is not a simple counter and can be "crowbarred" in
> > > common situations.
> > >
> > > rcutorture testing with all TREE RCU configurations succeed with
> > > CONFIG_RCU_EQS_DEBUG=y and CONFIG_PROVE_LOCKING=y.
> > >
> > > v1->v2:
> > > - Rebase on v5.6-rc6
> > >
> > > v2->v3:
> > > - Rebase on rcu/dev with adjustments for tasks-RCU.
> >
> > Thank you!
> >
> > But this does not apply to any of v5.6-rc6, v5.7-rc1, or v5.7-rc2.
> >
> > Where should I be trying to apply it?
>
> OK, morning blindness overcome.  I new see the "rcu/dev" in v2->v3.
>
> Please accept my apologies for the noise.

No problem, glad it got resolved. Thanks!

 - Joel