Date: Wed, 1 Feb 2006 02:06:50 -0800
From: Andrew Morton <akpm@osdl.org>
To: Avuton Olrich <avuton@gmail.com>
Cc: linux-kernel@vger.kernel.org, Dave Jones <davej@codemonkey.org.uk>,
       john stultz <johnstul@us.ibm.com>
Subject: Re: 2.6.16-rc1-mm4
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Avuton Olrich <avuton@gmail.com> wrote:
>
> On 1/31/06, Andrew Morton <akpm@osdl.org> wrote:
> > Avuton Olrich <avuton@gmail.com> wrote:
> > > I'm getting a kernel panic on my Libretto L5 on boot, I don't have a
> > > serial port on this laptop, I don't have time at the moment to setup
> > > netconsole, and it doesn't get the full information. Hopefully this
> > > picture helps a bit:
> > >
> > > http://68.111.224.150:8080/P1010306.JPG
> > >
> > > If it doesn't help I will attempt to get a netconsole on this computer
> > > on the near future.
> >
> > jpeg is fine.  It helps if you can get 50 rows on the screen - boot with
> > the appropriate `vga=' option, put SYSFONT="iso08.08" in
> > /etc/sysconfig/i18n, etc.
> >
> > It seems that some cpufreq notifier has done a divide-by-zero.  But I can't
> > see any sign of which one it is.  You might get a better trace if you set
> > CONFIG_FRAME_POINTER=n.
> >
> > If you could do those things and then prepare another photo it would really
> > help, thanks.
> 
> Disabled CONFIG_FRAME_POINTER and changed my font to ultra small. It's
> painful to read so use a good image viewing tool with zoom :)
> 
> http://68.111.224.150:8080/P1010001.JPG
> 
> Also, I tried the cpufreq.debug=7 thing that Dave Jones recommended
> and got no more output than I got without. I may have done something
> wrong, please let me know if it's needed.
> 

Ah, better, thanks.

You got the divide-by-zero in time_cpufreq_notifier().  John has been
playing with that in the time patches in -mm, so perhaps he broke it?

At a guess I'd say that there's some new startup ordering thing and
we're now passing zero into cpufreq_scale().
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