Date: Mon, 22 Nov 2004 23:12:24 +0100
From: Ingo Molnar <mingo@elte.hu>
To: Mark_H_Johnson@raytheon.com
Cc: Amit Shah <amit.shah@codito.com>,
       Karsten Wiese <annabellesgarden@yahoo.de>, Bill Huey <bhuey@lnxw.com>,
       Adam Heath <doogie@debian.org>, emann@mrv.com,
       Gunther Persoons <gunther_persoons@spymac.com>,
       "K.R. Foley" <kr@cybsft.com>, linux-kernel@vger.kernel.org,
       Florian Schmidt <mista.tapas@gmx.net>,
       Fernando Pablo Lopez-Lezcano <nando@ccrma.Stanford.EDU>,
       Lee Revell <rlrevell@joe-job.com>, Rui Nuno Capela <rncbc@rncbc.org>,
       Shane Shrybman <shrybman@aei.ca>, Esben Nielsen <simlo@phys.au.dk>,
       Thomas Gleixner <tglx@linutronix.de>,
       Michal Schmidt <xschmi00@stud.feec.vutbr.cz>
Subject: Re: [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm2-V0.7.30-2
Message-ID: <20041122221224.GA13799@elte.hu>
References: <OF73D7316A.42DF9BE5-ON86256F54.0057B6DC@raytheon.com>
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* Mark_H_Johnson@raytheon.com <Mark_H_Johnson@raytheon.com> wrote:

>  - echo 0 > /proc/sys/kernel/preempt_wakeup_timing [entered, but
> display was frozen at this point and did not see newline nor any
> further output]

managed to reproduce this on an SMP box but not on an UP box, so i think
this is SMP related. It definitely happens almost immediately after
preempt_wakeup_timing is reset - or after preempt_max_timing is reset. 
(Perhaps a dump_stack() from the wrong place, or something like that.)

	Ingo
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