From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alex Shi Subject: Re: [PATCH 3/3] cpuidle/menu: add per cpu pm_qos_resume_latency consideration Date: Fri, 20 Jan 2017 16:35:51 +0800 Message-ID: References: <1484227624-6740-1-git-send-email-alex.shi@linaro.org> <1484227624-6740-4-git-send-email-alex.shi@linaro.org> <20170117093837.GA2085@mai> <01f9b016-0b7c-44ac-70e5-8cd9b8bd1500@linaro.org> <20170119102158.GA1827@mai> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org To: "Rafael J. Wysocki" , Daniel Lezcano Cc: Greg Kroah-Hartman , "Rafael J . Wysocki" , Vincent Guittot , Linux PM , Linux Kernel Mailing List , Ulf Hansson , Rasmus Villemoes , Arjan van de Ven , Rik van Riel List-Id: linux-pm@vger.kernel.org On 01/20/2017 05:43 AM, Rafael J. Wysocki wrote: > The above may be problematic if the constraints change relatively > often. It is global and it will affect all of the CPUs in the system > every time and now think about systems with hundreds of them. Yes, the disadvantage is waking up all idle cpus when value changed. As to the multi core concern, maybe a per cpu notifier way is better? But that's another story of pm_qos... So Rafael, any comments for this patch version? Regards Alex