Messages in this thread | | | Subject | RE: thermal governor: does it actually work?? | From | Zhang Rui <> | Date | Tue, 19 Feb 2013 22:53:32 +0800 |
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On Mon, 2013-02-18 at 15:26 -0500, Alexander Lam wrote: > > On Feb 18, 2013 7:11 AM, "Zhang, Rui" <rui.zhang@intel.com> 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 <andi@lisas.de> > 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 >
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