linux-kernel - Re: SCHED_DEADLINE tasks causing WARNING at kernel/sched/sched.h message

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Message-ID: <7481bbd7c6652a963f132191dc622f1003938706.camel@codethink.co.uk>
Date: Tue, 02 Sep 2025 18:49:06 +0200
From: Marcel Ziswiler <marcel.ziswiler@...ethink.co.uk>
To: linux-kernel@...r.kernel.org
Cc: Ingo Molnar <mingo@...hat.com>, Peter Zijlstra <peterz@...radead.org>, 
 Juri Lelli <juri.lelli@...hat.com>, Vineeth Pillai
 <vineeth@...byteword.org>, Daniel Bristot de Oliveira <bristot@...nel.org>,
 Luca Abeni <luca.abeni@...tannapisa.it>
Subject: Re: SCHED_DEADLINE tasks causing WARNING at kernel/sched/sched.h
 message

Hi

On Tue, 2025-09-02 at 16:06 +0200, Marcel Ziswiler wrote:
> As part of our trustable work [1], we also run a lot of real time scheduler (SCHED_DEADLINE) tests on the
> mainline Linux kernel (v6.16.2 in below reported case).

Looking through more logs from earlier test runs I found similar WARN_ONs dating back as early as v6.15.3. So
it does not look like a "new" issue in that sense.

[snip]

Any help is much appreciated. Thanks!

Cheers

Marcel