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Date: Fri, 6 Apr 2007 16:45:36 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Andi Kleen <ak@suse.de>, virtualization@lists.osdl.org,
       lkml <linux-kernel@vger.kernel.org>
Subject: Re: [patch 18/20] clean up tsc-based sched_clock
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On Fri, 06 Apr 2007 16:27:20 -0700 Jeremy Fitzhardinge <jeremy@goop.org> wrote:

> > I still need to work out why that hang is happening - it is very
> > mysterious.  I got as far as working out that it was hanging on
> > write_seqlock_irqsave(xtime_lock), then remembered that it's with
> > CONFIG_SMP=n so I stomped off to bed in disgust.  Later.
> >   
> 
> Hangs always, or just sometimes?  I haven't seen any problems with it.

100%.  On the Vaio, of course.  The kernel's canary.