netdev - Re: locking api self-test hanging

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Message-Id: <1202130892.32654.81.camel@lappy>
Date:	Mon, 04 Feb 2008 14:14:52 +0100
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	netdev@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	linux-kernel@...r.kernel.org,
	Stephen Hemminger <shemminger@...ux-foundation.org>,
	Bernhard Walle <bwalle@...e.de>
Subject: Re: locking api self-test hanging


On Mon, 2008-02-04 at 05:04 -0800, Andrew Morton wrote:

> After disabling both CONFIG_DEBUG_LOCKING_API_SELFTESTS and netconsole
> (using current mainline) I get a login prompt, and also...

> [    7.819146] WARNING: at kernel/lockdep.c:2033 trace_hardirqs_on+0x9b/0x10d()

> That warning in lockdep.c should have a comment explaining to readers under
> which circumstances it will trigger, and what they did wrong.  In fact if
> I've interpreted it correctly I don't see why it's a DEBUG_LOCKS_WARN_ON
> thing at all?  It should be a first-class lockdep warning?

Agreed, I'll make lockdep print a nice error.

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