linux-kernel - Re: [PATCH] sched/rt: use smp_wmb in rt_clear

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Message-ID: <20241115104706.52b03f47@gandalf.local.home>
Date: Fri, 15 Nov 2024 10:47:06 -0500
From: Steven Rostedt <rostedt@...dmis.org>
To: Peter Zijlstra <peterz@...radead.org>
Cc: Jon Kohler <jon@...anix.com>, Ingo Molnar <mingo@...hat.com>, Juri Lelli
 <juri.lelli@...hat.com>, Vincent Guittot <vincent.guittot@...aro.org>,
 Dietmar Eggemann <dietmar.eggemann@....com>, Ben Segall
 <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>, Valentin Schneider
 <vschneid@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sched/rt: use smp_wmb in rt_clear_overload

On Fri, 15 Nov 2024 11:03:41 +0100
Peter Zijlstra <peterz@...radead.org> wrote:

> There is a comment in pull_rt_task() that says there is a barrier in
> rt_set_overloaded(), was there ever, when did it go away?

That's a typo. It matches the barrier in rt_set_overload().

I'll take a look at this change too, since I wrote a bunch of this code a
long time ago. :-p

-- Steve