linux-kernel - Re: Early hang with 2.6.21-rc4-rt1

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Message-ID: <20070325072947.GA10734@elte.hu>
Date:	Sun, 25 Mar 2007 09:29:47 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Roland Dreier <rdreier@...co.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Early hang with 2.6.21-rc4-rt1


* Roland Dreier <rdreier@...co.com> wrote:

> OK, another data point.  The config below boots and works with 
> 2.6.21-rc4-rt1, but enabling CONFIG_CRITICAL_IRQSOFF_TIMING causes the 
> early boot hang.
> 
> Any idea?

ah, i havent tried that option in quite some time, so bitrot is pretty 
likely. Does the problem go away if you disable CONFIG_FUNCTION_TRACE? 
If the problem goes away then it would suggest some sort of 
mcount()-driven recursion into hardirqs_off/hardirqs_on.

	Ingo
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