From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michael Karcher Subject: Re: power management regression in linux 3.10? Date: Tue, 04 Jun 2013 03:08:48 +0200 Message-ID: <1370308128.6305.3.camel@localhost> References: <1370282175.18020.4.camel@localhost> <1426816.yLxoxJJ6NX@vostro.rjw.lan> <51ACF071.702@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Return-path: Received: from outpost1.zedat.fu-berlin.de ([130.133.4.66]:53290 "EHLO outpost1.zedat.fu-berlin.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758848Ab3FCXIH (ORCPT ); Mon, 3 Jun 2013 19:08:07 -0400 In-Reply-To: <51ACF071.702@gmail.com> Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: Dirk Brandewie Cc: "Rafael J. Wysocki" , linux-pm@vger.kernel.org, Len Brown , Frederic Weisbecker Am Montag, den 03.06.2013, 12:37 -0700 schrieb Dirk Brandewie: > On 06/03/2013 12:34 PM, Rafael J. Wysocki wrote: > > On Monday, June 03, 2013 07:56:15 PM Michael Karcher wrote: > >> Hello, > > Yes, please try with CONFIG_NO_HZ_IDLE and see if you can reproduce the > > problem. Instead of doing that, I successfully applied Dirk's suggestion. Is CONFIG_NO_HZ + CONFIG_NO_HZ_IDLE worth testing? > > Does your system use intel_idle? You've set that in .config, but can you check > > what dmesg says, please? No, intel_idle complains it doesn't support my CPU family. > Unset CONFIG_NO_HZ it is setting CONFIG_CPU_IDLE_GOV_MENU which with > CONFIG_NO_HZ_FULL set is confusing intel_pstate. I am still trying to > figure out what the root cause is commit 5811d996 seems to be implicated. Unsetting CONFIG_NO_HZ helped. Now CPU0 is using C states again. > --Dirk Regards, Michael Karcher