linux-kernel - Re: NET_NS: unregister_netdevice: waiting for lo to become free (adding ipv6 address to interface)

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Message-ID: <20101022124858.GA719746@jupiter.n2.diac24.net>
Date:	Fri, 22 Oct 2010 14:48:58 +0200
From:	David Lamparter <equinox@...c24.net>
To:	Michael Leun <lkml20100708@...ton.leun.net>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Greg KH <greg@...ah.com>, netdev@...r.kernel.org,
	davem@...emloft.net, linux-kernel@...r.kernel.org,
	Alexey Dobriyan <adobriyan@...il.com>,
	Patrick McHardy <kaber@...sh.net>
Subject: Re: NET_NS: unregister_netdevice: waiting for lo to become free
 (adding ipv6 address to interface)

On Thu, Oct 21, 2010 at 05:15:32PM +0200, Michael Leun wrote:
> unfortunately the bug described below originally reported in 2.6.35-rcX
> is still there in 2.6.36.

can you post your full kernel .config?

I'm using network namespaces quite extensively - OpenVPN and IPv6
included - and i haven't hit this bug. That makes it rather likely it
depends on some option difference.

btw, while the bridging bug is unrelated, it might be the same kind of
origin - a skb not being free'd. can you leave the namespace running for
a few minutes and check whether the usage count number is higher then?

-David

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