netdev - [BUG] bridge leaks 3 references on lo per up&down

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Message-ID: <20100728095825.GC13413@jupiter.n2.diac24.net>
Date:	Wed, 28 Jul 2010 11:58:25 +0200
From:	David Lamparter <equinox@...c24.net>
To:	netdev@...r.kernel.org
Cc:	Stephen Hemminger <shemminger@...ux-foundation.org>,
	bridge@...ts.linux-foundation.org
Subject: [BUG] bridge leaks 3 references on lo per up&down

On Wed, Jul 28, 2010 at 09:44:28AM +0200, David Lamparter wrote:
> On Tue, Jul 27, 2010 at 10:02:49AM -0700, Stephen Hemminger wrote:
> > David Lamparter <equinox@...c24.net> wrote:
> > > unregister_netdevice: waiting for lo to become free. Usage count = 4
> > > 
> > > unshare -n -- /bin/bash -c 'ip link add link lo veth0 type veth peer
> > > name veth3 netns 1; brctl addbr br0; ip l s br0 up; ip a l; sleep 8'

When I do

unshare -n -- /bin/bash -c 'ip link add link lo veth0 type veth peer
	name veth3 netns 1; brctl addbr br0; \
	ip l s br0 up; sleep 8; ip l s br0 down; sleep 1;
	ip l s br0 up; sleep 8;'

I get "usage count = 7" on lo; when I add another up & down, I get
"usage count = 10". 4 times makes it a merry 13 refs...


-David

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