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

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Message-ID: <20090220215123.GI4834@alberich.amd.com>
Date:	Fri, 20 Feb 2009 22:51:23 +0100
From:	Andreas Herrmann <andreas.herrmann3@....com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Mark Hounschell <dmarkh@....rr.com>,
	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 Fri, Feb 20, 2009 at 01:34:02PM +0100, Ingo Molnar wrote:
> 
> * Andreas Herrmann <andreas.herrmann3@....com> wrote:
> 
> > 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.
> 
> Mind sending this patch as a hpet=verbose feature patch which we 
> could queue up for upstream merging? We have hpet problems 
> frequently, so some built-in debug/verbosity trigger would be 
> nice.

Yup, work is in progress.

Andreas


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