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From:   Joel Fernandes <joelaf@google.com>
Date:   Mon, 4 May 2020 14:18:50 -0400
Message-ID: <CAJWu+opxU7Vk1=StVmrbey_WLuCtvjw094oanpai3kuarAi07Q@mail.gmail.com>
Subject: Re: [PATCH v3 0/5] RCU dyntick nesting counter cleanups for rcu -dev
To:     paulmck@kernel.org
Cc:     "Joel Fernandes (Google)" <joel@joelfernandes.org>,
        LKML <linux-kernel@vger.kernel.org>,
        Andy Lutomirski <luto@kernel.org>,
        Frederic Weisbecker <fweisbec@gmail.com>,
        Amol Grover <frextrite@gmail.com>,
        Ingo Molnar <mingo@redhat.com>,
        Josh Triplett <josh@joshtriplett.org>,
        "Cc: Android Kernel" <kernel-team@android.com>,
        Lai Jiangshan <jiangshanlai@gmail.com>,
        Madhuparna Bhowmik <madhuparnabhowmik04@gmail.com>,
        Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Petr Mladek <pmladek@suse.com>, rcu@vger.kernel.org,
        Steven Rostedt <rostedt@goodmis.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Vineeth Remanan Pillai <vpillai@digitalocean.com>
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On Mon, May 4, 2020 at 1:44 PM Paul E. McKenney <paulmck@kernel.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