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Thu, 04 Sep 2025 02:22:57 -0700 (PDT) X-Google-Smtp-Source: AGHT+IG2JWZ60/knV9OgpBT7SZs8IxbNlk6vlAnUh474G2NebtwKbT/w3RxfdYlO2ffoQJspwuPqDw== X-Received: by 2002:a05:600c:3b19:b0:45b:9a46:69e9 with SMTP id 5b1f17b1804b1-45b9a466c97mr86776415e9.31.1756977777442; Thu, 04 Sep 2025 02:22:57 -0700 (PDT) Received: from jlelli-thinkpadt14gen4.remote.csb ([151.29.70.210]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3cf34494776sm26799771f8f.61.2025.09.04.02.22.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 04 Sep 2025 02:22:56 -0700 (PDT) Date: Thu, 4 Sep 2025 11:22:54 +0200 From: Juri Lelli To: Marcel Ziswiler Cc: linux-kernel@vger.kernel.org, Ingo Molnar , Peter Zijlstra , Vineeth Pillai , Luca Abeni Subject: Re: SCHED_DEADLINE tasks causing WARNING at kernel/sched/sched.h message Message-ID: References: <7481bbd7c6652a963f132191dc622f1003938706.camel@codethink.co.uk> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <7481bbd7c6652a963f132191dc622f1003938706.camel@codethink.co.uk> Hi Marcel, On 02/09/25 18:49, Marcel Ziswiler wrote: > 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! What's the actual workload composition leading the warning. I noticed stress-ng in the report. Could you please share more details? Thanks! Juri