From mboxrd@z Thu Jan  1 00:00:00 1970
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: Re: [patch] clockevents: Reinstate the per cpu tick skew
Date: Wed, 28 Dec 2011 17:57:24 +0100
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Cc: Arjan van de Ven <arjan@linux.intel.com>,
	RT <linux-rt-users@vger.kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>,
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To: Mike Galbraith <efault@gmx.de>
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On Wed, 2011-12-28 at 15:59 +0100, Mike Galbraith wrote:
> 
> > (and are you using a system where tsc/lapic can be used, or are you
> > using one of those boatanchors that need hpet?)
> 
> Box is an HP DL980, 64 x X7560. 

That smells like NHM-EX, aka boatanchor.