From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jarek Poplawski <jarkao2@gmail.com>
Subject: Re: Lockup with tun/tap/bridge interface deregistration.
Date: Thu, 11 Dec 2008 11:02:15 +0000
Message-ID: <20081211110215.GA5910@ff.dom.local>
References: <87fxkwhyyq.fsf@barad-dur.regala.cx> <20081211102421.GB4129@ff.dom.local> <20081211104303.GC4129@ff.dom.local> <20081211104954.GA25179@gondor.apana.org.au>
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Cc: Mathieu SEGAUD <mathieu.segaud@regala.cx>, netdev@vger.kernel.org,
	kernel@gentoo.org
To: Herbert Xu <herbert@gondor.apana.org.au>
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On Thu, Dec 11, 2008 at 09:49:54PM +1100, Herbert Xu wrote:
...
> Right, this fixes a dead-lock that causes the RTNL to be held which
> doesn't seem to be the case here.  It sounds like the problem in
> this thread is simply due to a non-zero ref count on the netdev
> itself.
> 
> Mathieu, you should get a message like this
> 
> 	unregister_netdevice: waiting for %s to become free. Usage count = %d
> 
> What does your count say?

Right, you can see this at the first link of Mathieu's message:
http://bugs.gentoo.org/attachment.cgi?id=174835&action=view

Jarek P.