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Subject: Re: 2.6.23-rc4-mm1 and -rc6-mm1: boot failure on HP nx6325,
	related to clockevents
From: Thomas Gleixner <tglx@linutronix.de>
To: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Mikhail Kshevetskiy <mikhail.kshevetskiy@gmail.com>,
       linux-kernel@vger.kernel.org, Dave Jones <davej@redhat.com>,
       Chuck Ebbert <cebbert@redhat.com>
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Date: Tue, 25 Sep 2007 14:28:25 +0200
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On Tue, 2007-09-25 at 14:20 +0200, Rafael J. Wysocki wrote:
> > > > As i can see from the log, you are booting on computer with dualcore AMD
> > > > processor. Do you have C1E feature enabled? 
> 
> That's possible, how to check?
> 
> > > > i386 kernel disable lapic on dualcore AMD with C1E support (see 
> > > > http://lkml.org/lkml/2007/3/29/199). x86_64 kernel do not have this
> > > > patch still (it's required for tickless kernel only).
> > > 
> > > Well it is required for non tickless mode as well.
> > > 
> > > >  As result, if
> > > > you run x86_64 kernel with hrt patch on such computer, the system
> > > > will stall during boot on lapic timer calibration.
> > > 
> > > Thanks for the reminder. I have a look into this.
> > 
> > Can you please boot mainline and provide the output of:
> > 
> > # cat /proc/interrupts; sleep 10; cat /proc/interrupts
> 
> albercik:~ # cat /proc/interrupts; sleep 10; cat /proc/interrupts
>            CPU0       CPU1
>   0:    1159492          0  local-APIC-edge      timer
> LOC:          0    1158220   Local interrupts
>
>   0:    1161996          0  local-APIC-edge      timer
> LOC:          0    1160723   Local interrupts

Hmm. That's strange. It looks like the local apic timer is not used, but
x86_64 definitely lacks the above check. Can you please remove/disable
the acpi processor module and recheck ?

	tglx