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Date: Wed, 2 Mar 2016 17:23:24 -0800
From: Jeremiah Mahler <jmmahler@...il.com>
To: David Ahern <dsa@...ulusnetworks.com>
Cc: Dexuan Cui <decui@...rosoft.com>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
Haiyang Zhang <haiyangz@...rosoft.com>,
"David S. Miller" <davem@...emloft.net>,
linux-kernel@...r.kernel.org
Subject: Re: [REGRESSION, bisect] net: ipv6: unregister_netdevice: waiting
for lo to become free. Usage count = 2
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
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