linux-kernel - Re: PROBLEM: Can't boot a (HZ = 1000) kernel using an AMD Phenom-II processor

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Message-ID: <20090220115357.GE4834@alberich.amd.com>
Date:	Fri, 20 Feb 2009 12:53:57 +0100
From:	Andreas Herrmann <andreas.herrmann3@....com>
To:	Mark Hounschell <dmarkh@....rr.com>
CC:	Borislav Petkov <borislav.petkov@....com>,
	Mark Hounschell <markh@...pro.net>,
	john stultz <johnstul@...ibm.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: PROBLEM: Can't boot a (HZ = 1000) kernel using an AMD Phenom-II
	processor

On Thu, Feb 19, 2009 at 10:54:19AM -0500, Mark Hounschell wrote:
> Borislav Petkov wrote:
> > On Thu, Feb 19, 2009 at 10:16:40AM -0500, Mark Hounschell wrote:
> >> Andreas Herrmann wrote:
> >>> Hi Mark,
> >>>
> >>> Can you please provide us output of lspci -vvxxx.
> >>> (Please run this as root.)
> >>>
> 
> Attached...
> 
> 
> >>> Furthermore you can try booting your 1000HZ kernel
> >>> with following kernel command lines:
> >>>

Thanks for trying this out.
But nothing suspicious found. I.e. timer/hpet interrupt is enabled
and its routing seems to be ok.

Here's one more check that's worth trying: In one of your logs I've
seen that HPET id reports 3 timers but later on 4 timers were detected
for HPET.

To check what's going on I'd like to see the HPET configuration in the
course of booting your system.  Please apply attached patch and boot
with hpet=debug -- both with 250HZ and with 1000HZ -- and provide dmesg
output.


Regards,

Andreas

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View attachment "hpet-debug.diff" of type "text/plain" (3891 bytes)