linux-kernel - Re: Unable to halt or reboot due to - unregister_netdevice: waiting for eth0.20 to become free. Usage count = 1

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Date:	Fri, 1 Sep 2006 13:35:20 +0200
From:	"Jesper Juhl" <jesper.juhl@...il.com>
To:	"Herbert Xu" <herbert@...dor.apana.org.au>
Cc:	greearb@...delatech.com, linux-kernel@...r.kernel.org,
	waltje@...lt.nl.mugnet.org, ross.biro@...il.com,
	davem@...emloft.net, yoshfuji@...ux-ipv6.org,
	netdev@...r.kernel.org
Subject: Re: Unable to halt or reboot due to - unregister_netdevice: waiting for eth0.20 to become free. Usage count = 1

On 01/09/06, Jesper Juhl <jesper.juhl@...il.com> wrote:
> On 01/09/06, Herbert Xu <herbert@...dor.apana.org.au> wrote:
> > Jesper Juhl <jesper.juhl@...il.com> wrote:
> > >
> > > I've just encountered the problem on a different server with an
> > > identical vlan setup. That server is running 2.6.13.4
> >
> > Do you have a simple recipe to reproduce this? Ideally it'd be a
> > script that anyone can execute in a freshly booted system that
> > exhibits the problem.
> >
> Well, the first server I saw this on only had a base install of debian
> stable on it, then I replaced the kernel, configured the vlan
> interface in /etc/network/interfaces typed 'reboot' and it failed -
> and it seems to fail reliably on reboot every time.
>
Ok, I've done some more testing and it seems, unfortunately, that I
can't trigger the problem reliably. I guess I was just "lucky" with my
first few reboots.
It now seems that uptime and/or amount of data that has flowed over
the vlan interface impacts the probability of hitting the problem.

-- 
Jesper Juhl <jesper.juhl@...il.com>
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