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Wysocki" , Juri Lelli , Joel Fernandes , Patrick Bellasi Subject: Re: [PATCH] Revert "cpufreq: schedutil: Don't restrict kthread to related_cpus unnecessarily" Message-ID: <20180508111451.rmoi2rk3md6lhbvl@vireshk-i7> References: <20180508073340.13114-1-dietmar.eggemann@arm.com> <20180508082242.bre6sjfvefhz6xc3@vireshk-i7> <8cf21b1a-ca6e-fed7-43c5-94c66ff5986b@arm.com> <20180508094526.ajyjrwytguhv4xpe@vireshk-i7> <20180508100227.GB3752@e108498-lin.cambridge.arm.com> <20180508103427.w2rq3vz3f66y4cxh@vireshk-i7> <20180508110003.GC3752@e108498-lin.cambridge.arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180508110003.GC3752@e108498-lin.cambridge.arm.com> User-Agent: NeoMutt/20180323-120-3dd1ac Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 08-05-18, 12:00, Quentin Perret wrote: > Right, I see your point. Now, with the current implementation, why should > we randomly force a CPU to manage the kthread of another ? IIUC deadline > should assign the kthreads to CPUs depending on the state of the system > when the task is created. So, from one boot to another, you could > theoretically end up with varying configurations, and varying power/perf > numbers. Yeah, if it is fixed at boot then there is no good reason to push it to any other CPU. I agree. -- viresh