linux-kernel - Re: [lkp] [net] 21bb45b419: kmsg.unregister_netdevice:waiting_for_br-lan_to_become_free.Usage

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Date:	Mon, 29 Feb 2016 11:03:31 -0800
From:	David Ahern <dsa@...ulusnetworks.com>
To:	kernel test robot <ying.huang@...ux.intel.com>
Cc:	lkp@...org, LKML <linux-kernel@...r.kernel.org>,
	0day robot <fengguang.wu@...el.com>
Subject: Re: [lkp] [net] 21bb45b419:
 kmsg.unregister_netdevice:waiting_for_br-lan_to_become_free.Usage_count=

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