Re: [stable] regression in 2.6.35.4 'load is to heavy (videosubsystem?)'

[Karsten Mehrhoff]

[Am 22.09.2010, 02:01 Uhr, schrieb Greg KH <greg@xxxxxxxxx>]

> On Tue, Sep 21, 2010 at 04:50:07PM -0700, Andrew Morton wrote:
> > On Mon, 30 Aug 2010 10:02:36 +0200
> > Karsten Mehrhoff <kawime@xxxxxx> wrote:
> >
> > > Using the same .config from 2.6.35.3 to compile 2.5.36.4 results in a
> > > heavy load with 2.6.35.4.
> >
> > A regression within -stable is rather bad.
>
> Agreed.
>
> > > Example:
> > >
> > > Difference between 2.6.35.1/2/3 and 2.6.35.4 while watching some  
> > videos:
> > > 2.6.35.4 switches the cpu for flash videos in the browser (opera or
> > > iceweasel) or other video outputs to 2200/2400/2600 MHz meanwhile  
> > 2.6.35.3
> > > (or older) stays at 1000 Mhz. That results in a higher cpu  
> > temperature,
> > > more power consumption and so one.
> > >
> > > Using other GUI program results in nearly the same problems with  
> > 2.6.35.4,
> > > so this kernel is unusable for me.
> > >
> > > Results to see the difference for the same action
> > > 2.6.35.4
> > > Core0 Temp:  +45.0__C
> > > Core1 Temp:  +43.0__C
> > > cpu MHz:	2200.000 or higher
> > >
> > > 2.6.35.3
> > > Core0 Temp:  +32.0__C
> > > Core1 Temp:  +31.0__C
> > > cpu MHz:	1000.000 (max. 1800, but falling back to 1000)
>
> Can you run 'git bisect' between 2.6.35.3 and 2.6.35.4 to try to find
> out the offending patch that caused this issue?
>
> thanks,
>
> greg k-h

Same for 2.6.35.5 using 256.53

For your info, I did run some tests today using a nVidia 9500GT

   Kernel       |   Performance with NVIDIA-Linux-x86_64-
                |       256.53      |    260.19.04 (BETA)
----------------------------------------------------------
 2.6.35.3       |      good         |      good
----------------------------------------------------------
 2.6.35.4       |       bad         |     not tested
----------------------------------------------------------
 2.6.35.5       |       bad         |      ~ good
----------------------------------------------------------
 2.6.36-rc4     |                   |
   (git1-5)     |     failed        |      good
----------------------------------------------------------
 2.6.36-rc4     |                   |
   (git1)       |     failed        |      good
----------------------------------------------------------


Karsten
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