From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tim Walberg Subject: Re: 4.8.1 regression with cpufreq governors Date: Wed, 19 Oct 2016 15:06:10 -0500 Message-ID: <20161019200610.GB9047@comcast.net> References: <20161018004606.GA5559@comcast.net> <2549240.nvakNXlyKF@vostro.rjw.lan> Reply-To: Tim Walberg Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <2549240.nvakNXlyKF@vostro.rjw.lan> Sender: linux-kernel-owner@vger.kernel.org To: "Rafael J. Wysocki" Cc: Tim Walberg , linux-kernel@vger.kernel.org, Linux PM list , Viresh Kumar List-Id: linux-pm@vger.kernel.org This indeed turned out to be the fix. On 10/18/2016 23:10 +0200, Rafael J. Wysocki wrote: >> On Monday, October 17, 2016 07:46:06 PM Tim Walberg wrote: >> > May or may not be related to similar reports, but here's what I've just observed >> > on my system. Built a stock kernel from tags/v4.8.1, relevant cpufreq bits: >> > >> > CONFIG_ACPI_CPU_FREQ_PSS=y >> > CONFIG_CPU_FREQ=y >> > CONFIG_CPU_FREQ_GOV_ATTR_SET=y >> > CONFIG_CPU_FREQ_GOV_COMMON=y >> > CONFIG_CPU_FREQ_STAT=y >> > CONFIG_CPU_FREQ_STAT_DETAILS=y >> > # CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE is not set >> > # CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE is not set >> > # CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set >> > # CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND is not set >> > CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE=y >> > # CONFIG_CPU_FREQ_DEFAULT_GOV_SCHEDUTIL is not set >> > CONFIG_CPU_FREQ_GOV_PERFORMANCE=y >> > CONFIG_CPU_FREQ_GOV_POWERSAVE=m >> > CONFIG_CPU_FREQ_GOV_USERSPACE=m >> > CONFIG_CPU_FREQ_GOV_ONDEMAND=m >> > CONFIG_CPU_FREQ_GOV_CONSERVATIVE=y >> > CONFIG_CPU_FREQ_GOV_SCHEDUTIL=m >> > # CONFIG_X86_PCC_CPUFREQ is not set >> > CONFIG_X86_ACPI_CPUFREQ=m >> > CONFIG_X86_ACPI_CPUFREQ_CPB=y >> > >> > >> > Conservative is set as default governer, yet when boot completes, all CPUs are >> > pegged at the highest frequency. Changing governor to powersave knocks them all >> > down to the lowest available frequency. Putting them back on conservative (or >> > ondemand) results in no change in frequency, despite generating load. Switching >> > to performance of course kicks them back up to high frequency. Basically, the >> > governors don't seem to be ... governing. >> >> The "convervative" governor issue seems to be the one fixed recently >> (http://git.kernel.org/cgit/linux/kernel/git/rafael/linux-pm.git/commit/?h=pm-cpufreq&id=abb6627910a1e783c8e034b35b7c80e5e7f98f41). >> >> I'm not sure why "ondemand" behaves incorrectly for you though. >> >> Thanks, >> Rafael End of included message -- twalberg@gmail.com, twalberg@comcast.net