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Date:	Mon, 12 Nov 2007 10:16:52 +0100
From:	Thomas Renninger <trenn@...e.de>
To:	Eric Piel <Eric.Piel@...l.fr>
Cc:	linux-kernel@...r.kernel.org,
	Venkatesh Pallipadi <venkatesh.pallipadi@...el.com>,
	Dave Jones <davej@...hat.com>
Subject: Re: Kernel panic at boot with ondemand governor as default
	(2.6.24-rc2)

On Sun, 2007-11-11 at 20:10 +0100, Eric Piel wrote:
> Hello,
> 
> I've tried kernel 2.6.24-rc2 and I have a problem with the new option 
> for setting up the cpufreq ondemand governor as default: a kernel panic 
> happens early at boot time. If I boot first with performance governor 
> and later change to ondemand, everything is fine (as usual).
> 
> This seems related to the delayed_workqueue. The kernel panic message 
> finishes by:
> EIP: [<c012aa60>] wq_per_cpu+0x0/0x10 SS:ESP 0068:c191be58
> Kernel panic - not syncing: Attempted to kill init!
> 
> A picture of the whole message is available here:
> http://pieleric.free.fr/unorder/1162-ondemand-panic.jpg
> 
> My computer is a x86 using speedstep-ich, and you can find the full 
> .config leading to the panic attached.
> 
> Does anyone has any idea was it going wrong?

Does it work if you compile speedstep-ich as a module?
If you load it, ondemand governor should still be set up automatically.
If this works, could it be that the kernel does not like that
queue_delayed_work_on is called that early?

   Thomas

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