From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1752750AbcB2TDg (ORCPT <rfc822;w@1wt.eu>);
	Mon, 29 Feb 2016 14:03:36 -0500
Received: from mail-pa0-f45.google.com ([209.85.220.45]:34897 "EHLO
	mail-pa0-f45.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1751895AbcB2TDe (ORCPT
	<rfc822;linux-kernel@vger.kernel.org>);
	Mon, 29 Feb 2016 14:03:34 -0500
Subject: Re: [lkp] [net] 21bb45b419:
 kmsg.unregister_netdevice:waiting_for_br-lan_to_become_free.Usage_count=
To: kernel test robot <ying.huang@linux.intel.com>
References: <87si0byk5w.fsf@yhuang-dev.intel.com>
Cc: lkp@01.org, LKML <linux-kernel@vger.kernel.org>,
        0day robot <fengguang.wu@intel.com>
From: David Ahern <dsa@cumulusnetworks.com>
Message-ID: <56D49603.4010900@cumulusnetworks.com>
Date: Mon, 29 Feb 2016 11:03:31 -0800
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:38.0)
 Gecko/20100101 Thunderbird/38.6.0
MIME-Version: 1.0
In-Reply-To: <87si0byk5w.fsf@yhuang-dev.intel.com>
Content-Type: text/plain; charset=windows-1252; format=flowed
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On 2/29/16 12:50 AM, kernel test robot wrote:
> FYI, we noticed the below changes on
>
> https://github.com/0day-ci/linux  David-Ahern/net-ipv6-Make-address-flushing-on-ifdown-optional/20160214-062626
> commit 21bb45b419243ee4d9d74f1d1f97164fbfc481c3 ("net: ipv6: Make address flushing on ifdown optional")
>
>
> [  136.160531] unregister_netdevice: waiting for br-lan to become free. Usage count = 1
>

How do I get the series of commands run? From the logs it looks like 
there is a creation of a bridge, eth0 enslavement, admin down on bridge 
and then delete of the bridge. When I run those commands in a VM I do 
not hit the usage count of 1, so I am clearly missing some commands.

Thanks for the report,
David