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[213.44.141.166]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-43d0a72ed3csm21539145e9.6.2025.03.12.06.32.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 12 Mar 2025 06:32:05 -0700 (PDT) From: Valentin Schneider To: Juri Lelli , linux-kernel@vger.kernel.org, cgroups@vger.kernel.org Cc: Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Waiman Long , Tejun Heo , Johannes Weiner , Michal =?utf-8?Q?K?= =?utf-8?Q?outn=C3=BD?= , Qais Yousef , Sebastian Andrzej Siewior , Swapnil Sapkal , Shrikanth Hegde , Phil Auld , luca.abeni@santannapisa.it, tommaso.cucinotta@santannapisa.it, Jon Hunter Subject: Re: [PATCH v3 1/8] sched/deadline: Ignore special tasks when rebuilding domains In-Reply-To: <20250310091935.22923-2-juri.lelli@redhat.com> References: <20250310091935.22923-1-juri.lelli@redhat.com> <20250310091935.22923-2-juri.lelli@redhat.com> Date: Wed, 12 Mar 2025 14:32:03 +0100 Message-ID: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain On 10/03/25 10:19, Juri Lelli wrote: > SCHED_DEADLINE special tasks get a fake bandwidth that is only used to > make sure sleeping and priority inheritance 'work', but it is ignored > for runtime enforcement and admission control. > > Be consistent with it also when rebuilding root domains. > > Reported-by: Jon Hunter > Fixes: 53916d5fd3c0 ("sched/deadline: Check bandwidth overflow earlier for hotplug") > Tested-by: Waiman Long > Tested-by: Jon Hunter > Signed-off-by: Juri Lelli Reviewed-by: Valentin Schneider