From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933056AbdBVPh2 (ORCPT ); Wed, 22 Feb 2017 10:37:28 -0500 Received: from mail-pg0-f50.google.com ([74.125.83.50]:36627 "EHLO mail-pg0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933061AbdBVPg6 (ORCPT ); Wed, 22 Feb 2017 10:36:58 -0500 Subject: Re: 9908859acaa9 cpuidle/menu: add per CPU PM QoS resume latency consideration To: Mike Galbraith , Peter Zijlstra References: <1487768197.27533.5.camel@gmx.de> <20170222131218.GS6515@twins.programming.kicks-ass.net> <08cafc1b-3e0f-ab48-da45-8ba591379635@linaro.org> <1487775823.4487.23.camel@gmx.de> Cc: LKML , "rafael.j.wysocki@intel.com" From: Alex Shi Message-ID: <6bf692e9-402f-a076-749b-c2efb77cf95b@linaro.org> Date: Wed, 22 Feb 2017 23:36:53 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.3.0 MIME-Version: 1.0 In-Reply-To: <1487775823.4487.23.camel@gmx.de> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 02/22/2017 11:03 PM, Mike Galbraith wrote: >> > >> > Yes, the dev_pm_qos_read_value() using a power.lock, that is right for normal device. >> > But as to this cpu here, the lock isn't necessary. >> > >> > Hi Rafael, >> > Is this fix ok? > That's what I was gonna do, but then figured RT users will take full > control when it really matters, so took the zero added cycles option > for RT instead. > Sorry. Mike. What you mean of 'took the zero added cycles option'? :) Regards Alex