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Date: Wed, 25 Jul 2007 10:52:04 +0200
From: Ingo Molnar <mingo@elte.hu>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>, linux-kernel@vger.kernel.org,
       Linus Torvalds <torvalds@linux-foundation.org>, stable@kernel.org,
       Greg KH <greg@kroah.com>, Chris Wright <chrisw@sous-sol.org>
Subject: Re: [patch] fix the softlockup watchdog to actually work
Message-ID: <20070725085204.GA22067@elte.hu>
References: <20070717114453.GA8212@elte.hu> <469CCF8F.4010107@goop.org> <20070717154934.GA24231@elte.hu> <20070725014912.35c7e325.akpm@linux-foundation.org>
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* Andrew Morton <akpm@linux-foundation.org> wrote:

> > apparently the functionality of the soft lockup watchdog was never 
> > actually tested with that patch applied ...
> > 
> > [this is -stable material too.]
> 
> Still isn't working.  I'm getting random meaningless softlockup 
> trippings coming out for no apparent reason.

hm, you still havent applied the other 4 patches i sent:

 softlockup-fix.patch

 softlockup-add-irq-regs-h.patch
 softlockup-better-printout.patch
 softlockup-cleanups.patch
 softlockup-use-cpu-clock.patch

they are all necessary.

softlockup-use-cpu-clock.patch could easily solve the present problem 
you have: as i pointed it out it is _wrong_ to use sched_clock(), 
because sched_clock() is not a reliable clocksource. Especially on your 
VAIO.

	Ingo