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Mon, 17 Feb 2025 08:25:18 -0800 (PST) X-Google-Smtp-Source: AGHT+IFdXsc4MSLBBft4Feb9QxRjqSmU4xNnKee9CG5WxjCrosP0JLNdZXOOenoA8hq2EjCjj8zu4g== X-Received: by 2002:a05:600c:1c28:b0:439:42c6:f11f with SMTP id 5b1f17b1804b1-4396e6ab033mr93370965e9.4.1739809518532; Mon, 17 Feb 2025 08:25:18 -0800 (PST) Received: from jlelli-thinkpadt14gen4.remote.csb ([151.29.34.42]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4395a1aa7c7sm158655425e9.27.2025.02.17.08.25.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 17 Feb 2025 08:25:17 -0800 (PST) Date: Mon, 17 Feb 2025 17:25:15 +0100 From: Juri Lelli To: Jon Hunter Cc: Christian Loehle , Dietmar Eggemann , Thierry Reding , Waiman Long , Tejun Heo , Johannes Weiner , Michal Koutny , Ingo Molnar , Peter Zijlstra , Vincent Guittot , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , Phil Auld , Qais Yousef , Sebastian Andrzej Siewior , "Joel Fernandes (Google)" , Suleiman Souhlal , Aashish Sharma , Shin Kawamura , Vineeth Remanan Pillai , linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, "linux-tegra@vger.kernel.org" Subject: Re: [PATCH v2 3/2] sched/deadline: Check bandwidth overflow earlier for hotplug Message-ID: References: <8ff19556-a656-4f11-a10c-6f9b92ec9cea@arm.com> <78f627fe-dd1e-4816-bbf3-58137fdceda6@nvidia.com> <30a8cda5-0fd0-4e47-bafe-5deefc561f0c@nvidia.com> <151884eb-ad6d-458e-a325-92cbe5b8b33f@nvidia.com> <371e6b88-e7d5-4e78-9468-33e29f7fdb53@nvidia.com> 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: <371e6b88-e7d5-4e78-9468-33e29f7fdb53@nvidia.com> On 17/02/25 16:10, Jon Hunter wrote: > > On 17/02/2025 16:08, Juri Lelli wrote: > > On 14/02/25 10:05, Jon Hunter wrote: > > > > ... > > > > > Sorry for the delay, the day got away from me. However, it is still not > > > working :-( > > > > Ouch. > > > > > Console log is attached. > > > > Thanks. Did you happen to also collect a corresponding trace? > > Sorry, but I am not sure exactly what trace do you want? Ah, sorry, I think I mentioned it somewhere else in this long thread. The idea would be to boot with something like "ftrace=nop trace_buf_size=50K" added to kernel cmdline. I would then try to offline CPUs 'manually' in the order suspend seems to be doing (starting from CPU5). Offlining CPU1 should still fail. At that point collect the trace with # cat /sys/kernel/debug/tracing/trace > trace.out and share it together with dmesg output as you have been doing so far. Thanks! Juri