linux-kernel - Re: kernel won't boot on a Cyrix MediaGXm (Geode )

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Message-ID: <20080729091821.GA20262@elte.hu>
Date:	Tue, 29 Jul 2008 11:18:21 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Samuel Sieb <samuel@...b.net>
Cc:	Juergen Beisert <jbe@...gutronix.de>, linux-kernel@...r.kernel.org,
	"Rafael C. de Almeida" <almeidaraf@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Magnus Damm <magnus@...inux.co.jp>,
	takada <takada@....nifty.com>
Subject: Re: kernel won't boot on a Cyrix MediaGXm (Geode )


* Samuel Sieb <samuel@...b.net> wrote:

> Ingo Molnar wrote:
>> * Samuel Sieb <samuel@...b.net> wrote:
>>
>>>> The only critical tweak I found is the one that changes the  
>>>> "Performance Control Incrementer" because its settings depends on 
>>>> the CPU's core frequency. Maybe this tweak should be removed, 
>>>> because the BIOS (hopefully) set it in a way the hardware supports.
>>> This was the only line that was a problem.  See the other branch of  
>>> this thread with Juergen Beisert.
>>
>> any patch we should pick up to make your box boot?
>
> Are you suggesting I should make the patch or you're just asking which 
> lines?  What I did to make a kernel that boots was to comment out the 
> line that calls the incrementor setup function.  It sounds like the 
> stepping 2 version doesn't have the problem, so if possible could you 
> call the function based on it not being a stepping 1 CPU?

yes, please send a patch we can apply. You did all the hard work 
tracking down this bug, you should get the credit as well :)

	Ingo
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