linux-kernel - Re: [patch 1/2] Ignore stolen time in the softlockup watchdog

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Date:	Tue, 27 Mar 2007 09:37:53 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Prarit Bhargava <prarit@...hat.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	virtualization@...ts.osdl.org, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	john stultz <johnstul@...ibm.com>,
	Zachary Amsden <zach@...are.com>,
	James Morris <jmorris@...ei.org>,
	Dan Hecht <dhecht@...are.com>,
	Paul Mackerras <paulus@...ba.org>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Chris Lalancette <clalance@...hat.com>,
	Rick Lindsley <ricklind@...ibm.com>
Subject: Re: [patch 1/2] Ignore stolen time in the softlockup watchdog

Prarit Bhargava wrote:
> I'd like to see this patch implement/fix touch_cpu_softlockup_watchdog
> and touch_softlockup_watchdog to mimic touch_nmi_watchdog's behaviour.

Why?  Is that more correct?  It seems to me that you're interested in
whether a specific CPU has gone and locked up.  If touching the watchdog
makes it update all CPU timestamps, then you'll hide the fact that other
CPUs have locked up, won't it?

    J
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