linux-kernel - Re: [PATCH RT v2 3/3] rcu: Disable use_softirq on PREEMPT

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Date:   Fri, 23 Aug 2019 18:32:32 +0200
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     "Paul E. McKenney" <paulmck@...ux.ibm.com>
Cc:     Scott Wood <swood@...hat.com>, linux-rt-users@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Joel Fernandes <joel@...lfernandes.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Clark Williams <williams@...hat.com>
Subject: Re: [PATCH RT v2 3/3] rcu: Disable use_softirq on PREEMPT_RT

On 2019-08-21 16:40:18 [-0700], Paul E. McKenney wrote:
> Save a couple of lines?
> 
> static bool use_softirq = !IS_ENABLED(CONFIG_PREEMPT_RT_FULL);
> 
> And if I understand your point above, the module_param() might be
> able to be the same either way given the new RCU.  But if not,
> at least we get rid of the #else.

I *think* we wanted this. And while I took the RCU patches for v5.2 I
forgot to enable it by default…

> 							Thanx, Paul

Sebastian