From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric Dumazet <eric.dumazet@gmail.com>
Subject: Re: network device reference leak with net-next
Date: Mon, 15 Nov 2010 20:04:00 +0100
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Cc: netdev@vger.kernel.org
To: Stephen Hemminger <shemminger@vyatta.com>
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Le lundi 15 novembre 2010 =C3=A0 10:56 -0800, Stephen Hemminger a =C3=A9=
crit :
> This is a new regression (doesn't exist with 2.6.36)
>=20
> If I shutdown KVM instance with Virt manager, the virtual
> interfaces in the bridge aren't getting cleaned up because
> of leftover reference count.
>=20
>=20
> [ 9781.050474] unregister_netdevice: waiting for vnet1 to become free=
=2E Usage count =3D 1
> [ 9785.143400] virbr4: port 3(vnet6) entering forwarding state
> [ 9785.177194] virbr4: port 3(vnet6) entering disabled state
> [ 9785.201129] device vnet6 left promiscuous mode
> [ 9785.201135] virbr4: port 3(vnet6) entering disabled state
> [ 9791.286950] unregister_netdevice: waiting for vnet1 to become free=
=2E Usage count =3D 1
> [ 9795.461526] unregister_netdevice: waiting for vnet6 to become free=
=2E Usage count =3D 1
> [ 9801.523398] unregister_netdevice: waiting for vnet1 to become free=
=2E Usage count =3D 1
> --

Is the refcount stay forever to 1, or eventually reaches 0 ?