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Date:   Wed, 16 Dec 2020 09:19:04 +0100
From:   Peter Zijlstra <>
To:     Thomas Gleixner <>
Cc:     Steven Rostedt <>,
        Anna-Maria Behnsen <>,, Ingo Molnar <>,
        Juri Lelli <>,
        Vincent Guittot <>,
        Dietmar Eggemann <>,
        Ben Segall <>, Mel Gorman <>,
        Daniel Bristot de Oliveira <>
Subject: Re: [PATCH] sched: Prevent raising SCHED_SOFTIRQ when CPU is !active

On Tue, Dec 15, 2020 at 06:52:49PM +0100, Thomas Gleixner wrote:
> I might be missing something, but how is the CPU which runs the pinned
> kernel thread, i.e. the hotplug thread, supposed to go idle between the
> two calls?

Take a mutex or something other daft. My disabling preemption around it
we basically assert the two functions are non-blocking and none of that
cruft matters.

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