From mboxrd@z Thu Jan 1 00:00:00 1970 From: Viresh Kumar Subject: Re: 4.8.1 regression with cpufreq governors Date: Wed, 19 Oct 2016 19:36:08 +0530 Message-ID: <20161019140608.GA11766@vireshk-i7> References: <20161018004606.GA5559@comcast.net> <2549240.nvakNXlyKF@vostro.rjw.lan> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mail-pf0-f182.google.com ([209.85.192.182]:33834 "EHLO mail-pf0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755784AbcJSOLi (ORCPT ); Wed, 19 Oct 2016 10:11:38 -0400 Received: by mail-pf0-f182.google.com with SMTP id r16so17050992pfg.1 for ; Wed, 19 Oct 2016 07:11:38 -0700 (PDT) Content-Disposition: inline In-Reply-To: <2549240.nvakNXlyKF@vostro.rjw.lan> Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: "Rafael J. Wysocki" Cc: Tim Walberg , linux-kernel@vger.kernel.org, Linux PM list On 18-10-16, 23:10, 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. @Tim: Can you please try this as well: https://marc.info/?l=linux-kernel&m=147624218132250&w=2 Subject: [PATCH V2] cpufreq: skip invalid entries when searching the frequency -- viresh