linux-kernel - Re: 2.6.23-rc2-mm1 -- INFO: possible circular locking dependency detected

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Message-Id: <1186739275.9771.10.camel@johannes.berg>
Date:	Fri, 10 Aug 2007 11:47:55 +0200
From:	Johannes Berg <johannes@...solutions.net>
To:	Alexey Starikovskiy <aystarik@...il.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Miles Lane <miles.lane@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Oleg Nesterov <oleg@...sign.ru>
Subject: Re: 2.6.23-rc2-mm1 -- INFO: possible circular locking dependency 
	detected

On Fri, 2007-08-10 at 02:47 +0400, Alexey Starikovskiy wrote:

> > Presumably the new debugging patches in -mm
> > (workqueue-debug-flushing-deadlocks-with-lockdep.patch and
> > workqueue-debug-work-related-deadlocks-with-lockdep.patch) think they have
> > found a potential deadlock in ACPI.  I don't have time to pick through the
> > code to confirm that, but boy I'm good at adding cc's ;)

> Yep, it indeed may lock up... Here is a patch to avoid it

Cool. I'm impressed this stuff actually finds something :)

johannes

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