linux-kernel - Re: sched: Unexpected reschedule of offline CPU#2!

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Message-ID: <20250728131334.GB11434@pauld.westford.csb>
Date: Mon, 28 Jul 2025 09:13:34 -0400
From: Phil Auld <pauld@...hat.com>
To: Thomas Gleixner <tglx@...utronix.de>
Cc: Jan Kiszka <jan.kiszka@...mens.com>,
	Henning Schild <henning.schild@...mens.com>,
	Peter Zijlstra <peterz@...radead.org>, x86@...nel.org,
	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
	Borislav Petkov <bp@...en8.de>, Guenter Roeck <linux@...ck-us.net>,
	xenomai@...omai.org, guocai.he.cn@...driver.com
Subject: Re: sched: Unexpected reschedule of offline CPU#2!

On Sun, Jul 20, 2025 at 12:47:24PM +0200 Thomas Gleixner wrote:
> On Sat, Jul 19 2025 at 23:17, Thomas Gleixner wrote:
> > On Wed, Jul 09 2025 at 09:44, Phil Auld wrote:
> >> Hi Thomas,
> >>
> >> On Tue, Sep 03, 2024 at 05:27:58PM +0200 Thomas Gleixner wrote:
> >>> On Tue, Jul 27 2021 at 10:46, Jan Kiszka wrote:
> >>> 
> >>> Picking up this dead thread again.
> >>
> >> Necro-ing this again...
> >>
> >> I keep getting occasional reports of this case. Unfortunately
> >> though, I've never been able to reproduce it myself.
> >>
> >> Did the below patch ever go anywhere?
> >
> > Nope. Guocai said it does not work and I have no reproducer either to
> > actually look at it deeper and there was further debug data provided.
> 
> Obviously:
> 
>         no further debug data was provided, so I can only tap in the
>         dark.
>

Fair enough, thanks. I did not see the "does not work" part :)


Cheers,
Phil


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