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Date:   Mon, 9 Nov 2020 13:23:17 +0100
From:   Peter Zijlstra <peterz@infradead.org>
To:     paulmck@kernel.org
Cc:     rcu@vger.kernel.org, linux-kernel@vger.kernel.org,
        kernel-team@fb.com, mingo@kernel.org, jiangshanlai@gmail.com,
        akpm@linux-foundation.org, mathieu.desnoyers@efficios.com,
        josh@joshtriplett.org, tglx@linutronix.de, rostedt@goodmis.org,
        dhowells@redhat.com, edumazet@google.com, fweisbec@gmail.com,
        oleg@redhat.com, joel@joelfernandes.org
Subject: Re: [PATCH tip/core/rcu 2/4] docs: Update RCU's hotplug requirements
 with a bit about design
Message-ID: <20201109122317.GM2594@hirez.programming.kicks-ass.net>
References: <20201105230444.GA18574@paulmck-ThinkPad-P72>
 <20201105230510.18660-2-paulmck@kernel.org>
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On Thu, Nov 05, 2020 at 03:05:08PM -0800, paulmck@kernel.org wrote:
> From: "Joel Fernandes (Google)" <joel@joelfernandes.org>
> 
> The rcu_barrier() section of the "Hotplug CPU" section discusses
> deadlocks, however the description of deadlocks other than those involving
> rcu_barrier() is rather incomplete.
> 
> This commit therefore continues the section by describing how RCU's
> design handles CPU hotplug in a deadlock-free way.
> 
> Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
> ---
>  .../RCU/Design/Requirements/Requirements.rst       | 49 +++++++++++++++++-----
>  1 file changed, 39 insertions(+), 10 deletions(-)
> 
> diff --git a/Documentation/RCU/Design/Requirements/Requirements.rst b/Documentation/RCU/Design/Requirements/Requirements.rst
> index 1ae79a1..98557fe 100644
> --- a/Documentation/RCU/Design/Requirements/Requirements.rst
> +++ b/Documentation/RCU/Design/Requirements/Requirements.rst
> @@ -1929,16 +1929,45 @@ The Linux-kernel CPU-hotplug implementation has notifiers that are used
>  to allow the various kernel subsystems (including RCU) to respond
>  appropriately to a given CPU-hotplug operation. Most RCU operations may
>  be invoked from CPU-hotplug notifiers, including even synchronous
> -grace-period operations such as ``synchronize_rcu()`` and
> -``synchronize_rcu_expedited()``.

I was under the impression that this rst crap now recognises func() and
you no longer need to make the text unreadable with "``".