From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jeremy Fitzhardinge <jeremy@goop.org>
Subject: Re: [patch 1/4] Ignore stolen time in the softlockup watchdog
Date: Tue, 24 Apr 2007 13:00:49 -0700
Message-ID: <462E61F1.7060403@goop.org>
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To: Andrew Morton <akpm@linux-foundation.org>
Cc: Ingo Molnar <mingo@elte.hu>, Linux Kernel <linux-kernel@vger.kernel.org>, virtualization@lists.osdl.org, Prarit Bhargava <prarit@redhat.com>, Eric Dumazet <dada1@cosmosbay.com>, Thomas Gleixner <tglx@linutronix.de>, john stultz <johnstul@us.ibm.com>, Zachary Amsden <zach@vmware.com>, James Morris <jmorris@namei.org>, Dan Hecht <dhecht@vmware.com>, Paul Mackerras <paulus@samba.org>, Martin Schwidefsky <schwidefsky@de.ibm.com>, Chris Lalancette <clalance@redhat.com>, Rick Lindsley <ricklind@us.ibm.com>, Andi Kleen <ak@suse.de>
List-Id: virtualization@lists.linuxfoundation.org

Andrew Morton wrote:
> Well, it _is_ mysterious.
>
> Did you try to locate the code which failed?  I got lost in macros and
> include files, and gave up very very easily.  Stop hiding, Ingo.
>   

OK, I've managed to reproduce it.  Removing the local_irq_save/restore
from sched_clock() makes it go away, as I'd expect (otherwise it would
really be magic).  But given that it never seems to touch the softlockup
during testing, I have no idea what difference it makes...

    J