linux-kernel - Re: [PATCH] rcu/nocb: Add an option to ON/OFF an offloading from RT context

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Message-ID: <20220510100946.5fdff700@gandalf.local.home>
Date:   Tue, 10 May 2022 10:09:46 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     "Paul E. McKenney" <paulmck@...nel.org>
Cc:     Uladzislau Rezki <urezki@...il.com>,
        Joel Fernandes <joel@...lfernandes.org>,
        Alison Chaiken <achaiken@...ora.tech>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>, RCU <rcu@...r.kernel.org>,
        Frederic Weisbecker <frederic@...nel.org>,
        Neeraj Upadhyay <neeraj.iitr10@...il.com>,
        Oleksiy Avramchenko <oleksiy.avramchenko@...y.com>
Subject: Re: [PATCH] rcu/nocb: Add an option to ON/OFF an offloading from RT
 context

On Mon, 9 May 2022 11:39:34 -0700
"Paul E. McKenney" <paulmck@...nel.org> wrote:

> This allows your current RCU_NOCB_CPU_CB_BOOST with something like
> this in place of the "default n":
> 
> 	default y if PREEMPT_RT
> 	default n if !PREEMPT_RT

BTW, I don't think you need the !PREEMPT_RT, because all configs are
'n' by  default. That is:

	default y if PREEMPT_RT

should be good enough.

-- Steve