linux-kernel - Re: [REGRESSION] intermittent psi_avgs

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Message-ID: <aJE1eGwVkQdfDeOF@debian.local>
Date: Mon, 4 Aug 2025 23:34:32 +0100
From: Chris Bainbridge <chris.bainbridge@...il.com>
To: Johannes Weiner <hannes@...xchg.org>
Cc: linux-kernel@...r.kernel.org, surenb@...gle.com, bsegall@...gle.com,
	dietmar.eggemann@....com, mingo@...hat.com, juri.lelli@...hat.com,
	mgorman@...e.de, peterz@...radead.org, rostedt@...dmis.org,
	vschneid@...hat.com, vincent.guittot@...aro.org,
	regressions@...ts.linux.dev
Subject: Re: [REGRESSION] intermittent psi_avgs_work soft lockup

On Mon, Aug 04, 2025 at 09:32:40AM -0400, Johannes Weiner wrote:
> Hi Chris,
> 
> On Sun, Aug 03, 2025 at 11:14:42PM +0100, Chris Bainbridge wrote:
> > Hello,
> > 
> > I'm getting intermittent soft lockups with recent kernel builds. This is
> > a new error that I haven't seen before.
> 
> This smells of the seqlock re-init problem in 570c8efd5eb7. Could you
> try to see if the below patch fixes it for you?
> 
> https://lore.kernel.org/lkml/20250716104050.GR1613200@noisy.programming.kicks-ass.net/
> 
> We probably want Cc: stable on this patch now that 6.16 is released.
> 
> Thanks

That's the one. Thank you.

#regzbot introduced: 570c8efd5eb7
#regzbot monitor: https://lore.kernel.org/lkml/0d86c527-27a7-44d5-9ddc-f9a153f67b4d@meta.com/
#regzbot fix: 99b773d720ae