netdev - Re: Occational lockups during boot with post 2.6.22 kernels

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Message-Id: <1184773870.4002.8.camel@johannes.berg>
Date:	Wed, 18 Jul 2007 17:51:10 +0200
From:	Johannes Berg <johannes@...solutions.net>
To:	Chuck Ebbert <cebbert@...hat.com>
Cc:	Peter Osterlund <petero2@...ia.com>, linux-kernel@...r.kernel.org,
	Bcm43xx-dev@...ts.berlios.de,
	"John W. Linville" <linville@...driver.com>,
	Netdev <netdev@...r.kernel.org>
Subject: Re: Occational lockups during boot with post 2.6.22 kernels

On Wed, 2007-07-18 at 10:58 -0400, Chuck Ebbert wrote:
> On 07/17/2007 08:20 PM, Peter Osterlund wrote:
> > Current -git kernels sometimes lock up on my computer during boot. I
> > guess it happens about 10-20% of the time. I first saw this maybe a
> > week ago, but never with kernels <= 2.6.22.
> > 
> > The last reported info on the console is that named is started.
> > SysRq-T still works and reports the non-sleeping tasks below.
> > 
> > My guess is that wpa_supplicant and events/0 deadlock and later the
> > named thread also hangs when it needs a deadlocked resource.
> > 
> > I'm using the bcm43xx driver.
> >  
> > No lockdep errors are reported before the lockup. Earlier during boot
> > the kernel reports:
> > 
> >   Good, all 218 testcases passed! |
> 
> Try this, it should at least detect the problem:
> 
> http://lkml.org/lkml/2007/7/17/202
> http://lkml.org/lkml/2007/7/17/204
> http://lkml.org/lkml/2007/7/17/203
> 
> It's a known bug in wireless/80211, not sure when it will be fixed.

Heh, yes, that's the patchset that came from this bug :)
A patch for this is available but due to process issues hasn't
percolated up yet. See
http://thread.gmane.org/gmane.linux.kernel.wireless.general/3315/focus=3319

johannes

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