Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754997AbcCCBX3 (ORCPT ); Wed, 2 Mar 2016 20:23:29 -0500 Received: from mail-pf0-f179.google.com ([209.85.192.179]:33114 "EHLO mail-pf0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750797AbcCCBX1 (ORCPT ); Wed, 2 Mar 2016 20:23:27 -0500 Date: Wed, 2 Mar 2016 17:23:24 -0800 From: Jeremiah Mahler To: David Ahern Cc: Dexuan Cui , "netdev@vger.kernel.org" , Haiyang Zhang , "David S. Miller" , linux-kernel@vger.kernel.org Subject: Re: [REGRESSION, bisect] net: ipv6: unregister_netdevice: waiting for lo to become free. Usage count = 2 Message-ID: <20160303012324.GA1882@hudson.localdomain> Mail-Followup-To: Jeremiah Mahler , David Ahern , Dexuan Cui , "netdev@vger.kernel.org" , Haiyang Zhang , "David S. Miller" , linux-kernel@vger.kernel.org References: <6c735168f53548a39bd21e6e9857f512@HKXPR3004MB0088.064d.mgd.msft.net> <20160301200749.GA1611@hudson.localdomain> <20160302203150.GA2045@hudson.localdomain> <56D75465.4060705@cumulusnetworks.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <56D75465.4060705@cumulusnetworks.com> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1142 Lines: 28 Hi David, On Wed, Mar 02, 2016 at 01:00:21PM -0800, David Ahern wrote: > On 3/2/16 12:31 PM, Jeremiah Mahler wrote: > >>On Tue, Mar 01, 2016 at 08:11:54AM +0000, Dexuan Cui wrote: > >>>Hi, I got this line every 10 seconds with today's linux-next in a Hyper-V guest, even > >>>when I didn't configure any NIC for the guest: > >>> > >>>[ 72.604249] unregister_netdevice: waiting for lo to become free. Usage count = 2 > >>>[ 82.708170] unregister_netdevice: waiting for lo to become free. Usage count = 2 > >>>[ 92.788079] unregister_netdevice: waiting for lo to become free. Usage count = 2 > >>>[ 102.808132] unregister_netdevice: waiting for lo to become free. Usage count = 2 > >>>[ 112.928166] unregister_netdevice: waiting for lo to become free. Usage count = 2 > >>>[ 122.952069] unregister_netdevice: waiting for lo to become free. Usage count = 2 > >>> > >>>I don't think this is related to the underlying host, since it's related to "lo". > > This should fix it: > https://patchwork.ozlabs.org/patch/591102/ > > > David That patch fixes the problem on my machine. Thanks for the quick fix :-) -- - Jeremiah Mahler