netdev - Re: Lockup with tun/tap/bridge interface deregistration.

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Date:	Thu, 11 Dec 2008 11:02:15 +0000
From:	Jarek Poplawski <jarkao2@...il.com>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	Mathieu SEGAUD <mathieu.segaud@...ala.cx>, netdev@...r.kernel.org,
	kernel@...too.org
Subject: Re: Lockup with tun/tap/bridge interface deregistration.

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.
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