linux-kernel - Re: Clocksource tsc is always unstable with 2.6.25-* kernels and CONFIG_NO

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Date:	Mon, 25 Feb 2008 21:48:06 +0100
From:	Gabriel C <nix.or.die@...glemail.com>
To:	Thomas Gleixner <tglx@...utronix.de>
CC:	Robert Hancock <hancockr@...w.ca>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Gabriel C <crazy@...galware.org>
Subject: Re: Clocksource tsc is always unstable with 2.6.25-* kernels and
 CONFIG_NO_HZ=y on my box

Thomas Gleixner wrote:
> On Mon, 25 Feb 2008, Gabriel C wrote:
>>>>> Booting nohz=off fixes that.
>>>>>
>>>>> Another strange thing is when I try to boot that kernel with
>>>>> clocksource=acpi_pm it just hangs.
> 
> What happens if you add clocksource=acpi_pm and nohz=off to the kernel
> commandline ?
> 

Then the kernel boots and it seems to work.

http://frugalware.org/~crazy/dmesg/lara/dmesg2

>>>> Please post your full dmesg output.
>>> Yes please.
>> dmesg's from 2.6.25-rc3 witch nohz={on,off} , lspci , dmidecode and
>> the used config for this kernel can be found there :
>>
>> http://frugalware.org/~crazy/dmesg/lara/
> 
> Hmm. Nothing really obvious.

If you want I can build an debug kernel and boot with initcall_debug or anything else may help to find the problem,
just let me know.

> 
> Thanks,
> 	tglx
> 

Gabriel
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