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From: V13 <v13@priest.com>
To: William Lee Irwin III <wli@holomorphy.com>
Subject: Re: 2.6.8-rc3-mm2
Date: Tue, 10 Aug 2004 15:52:20 +0300
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Cc: Ingo Molnar <mingo@elte.hu>, Jesse Barnes <jbarnes@engr.sgi.com>,
       Andrew Morton <akpm@osdl.org>, linux-kernel@vger.kernel.org,
       Nick Piggin <nickpiggin@yahoo.com.au>
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On Tuesday 10 August 2004 14:53, William Lee Irwin III wrote:
> On Tue, Aug 10, 2004 at 02:00:51AM -0700, William Lee Irwin III wrote:
> >>> It deadlocks with or without the fork_idle() call being via keventd;
> >>> the printk change is what makes the difference. =(
>
> On Tue, Aug 10, 2004 at 02:38:31AM -0700, William Lee Irwin III wrote:
> >> Okay, it deadlocks with both mdelay(1000) and yield() in place of the
> >> printk(). Trying manual calls to schedule() and local_irq_enable() next.
>
> On Tue, Aug 10, 2004 at 03:02:34AM -0700, William Lee Irwin III wrote:
> > Replacing the printk() with either of the following two things didn't
> > work: (a) yield();
> > (b) local_irq_enable(); set_current_state(TASK_RUNNING); schedule();
>
> Okay, these also failed as replacements for printk():
> (c) local_irq_enable();
> (d) local_irq_enable(); set_current_state(TASK_RUNNING);
> 	schedule(); mdelay(1000);
> (e) local_irq_enable(); set_current_state(TASK_RUNNING);
> 	for (i = 0; i < 1000; ++i) mdelay(1);
> 	set_current_state(TASK_RUNNING); schedule();

Why don't you create a copy of printk() and start commenting out lines in 
there?

> -- wli
<<V13>>