From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933051Ab3BSOxl (ORCPT ); Tue, 19 Feb 2013 09:53:41 -0500 Received: from mga11.intel.com ([192.55.52.93]:13803 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932958Ab3BSOxj (ORCPT ); Tue, 19 Feb 2013 09:53:39 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.84,696,1355126400"; d="scan'208";a="289076589" Message-ID: <1361285612.2323.22.camel@rzhang1-mobl4> Subject: RE: thermal governor: does it actually work?? From: Zhang Rui To: Alexander Lam Cc: Len Brown , linux-kernel@vger.kernel.org, Andreas Mohr , "R, Durgadoss" , "peter@piie.net" Date: Tue, 19 Feb 2013 22:53:32 +0800 In-Reply-To: References: <20130214153255.GA5033@rhlx01.hs-esslingen.de> <744357E9AAD1214791ACBA4B0B90926329ED72@SHSMSX101.ccr.corp.intel.com> <20130215154931.GA26213@rhlx01.hs-esslingen.de> <744357E9AAD1214791ACBA4B0B90926329F98E@SHSMSX101.ccr.corp.intel.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3-0ubuntu6 Content-Transfer-Encoding: 7bit Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2013-02-18 at 15:26 -0500, Alexander Lam wrote: > > On Feb 18, 2013 7:11 AM, "Zhang, Rui" wrote: > > > > Sorry I missed that patch. > > > > So the problem happens when the acerhdf thermal zone is registered > when the fan has already been spinning, right? > > Correct, when the acerhdf driver is switched into kernel controlled > mode and the fan is spinning, it stays spinning until the temperature > goes above the fan-on trip point and then below the fan-off trip > point. then the fan shuts off. > > I don't have an opinion on how this is fixed, so do whatever you want > with my patch. Maybe you should drop it entirely if we do end up > applying Peter's fix. > > > > > > > > Thanks, > > > > rui > > > > > > > > From: Alexander Lam [mailto:azl@andrew.cmu.edu] > > Sent: Sunday, February 17, 2013 4:56 AM > > To: Andreas Mohr > > Cc: Zhang, Rui; linux-kernel@vger.kernel.org; R, Durgadoss; > peter@piie.net; lenb@kernel.org > > Subject: Re: thermal governor: does it actually work?? > > Importance: High > > > > > > > > I wrote a patch to fix this: > > > > > > http://lkml.org/lkml/2012/12/30/47 I think this is the right fix, but I still need to check if there is some extra work needed before applying it. thanks, rui > > > > But nobody picked it up and since then I have been too busy to > respin the patch for new -rc kernels. > > > > -Alexander Lam > > > > On Fri, Feb 15, 2013 at 10:49 AM, Andreas Mohr > wrote: > > > > Hi, > > > > > > On Fri, Feb 15, 2013 at 09:47:07AM +0000, Zhang, Rui wrote: > > > Please attach the output of > > > "grep . /sys/class/thermal/thermal_zone*/cdev*/*"? > > > > # grep . /sys/class/thermal/thermal_zone*/cdev*/* > > /sys/class/thermal/thermal_zone0/cdev0/cur_state:1 > > /sys/class/thermal/thermal_zone0/cdev0/max_state:1 > > grep: /sys/class/thermal/thermal_zone0/cdev0/power: Is a directory > > grep: /sys/class/thermal/thermal_zone0/cdev0/subsystem: Is a > directory > > /sys/class/thermal/thermal_zone0/cdev0/type:acerhdf-fan > > > > > > > The question is that if we can also call it "throttle" when > reducing the device performance to generate less heat. > > > > I won't continue to elaborate on this separate issue now, given that > my time > > currently is very limited ;) > > > > > > Andreas Mohr > > -- > > To unsubscribe from this list: send the line "unsubscribe > linux-kernel" in > > the body of a message to majordomo@vger.kernel.org > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > Please read the FAQ at http://www.tux.org/lkml/ > > > > > > -Alexander Lam >