linux-kernel - Re: sched_core_balance() releasing interrupts with pi

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Message-ID: <20220321133037.7d0d0c7f@gandalf.local.home>
Date:   Mon, 21 Mar 2022 13:30:37 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        joel@...lfernandes.org
Subject: Re: sched_core_balance() releasing interrupts with pi_lock held

On Wed, 16 Mar 2022 22:03:41 +0100
Peter Zijlstra <peterz@...radead.org> wrote:

> Does something like the below (untested in the extreme) help?

Hi Peter,

This has been tested extensively by the ChromeOS team and said that it does
appear to fix the problem.

Could you get this into mainline, and tag it for stable so that it can be
backported to the appropriate stable releases?

Thanks for the fix!

-- Steve