RE: [REGRESSION, bisect] net: ipv6: unregister_netdevice: waiting for lo to become free. Usage count = 2

From	Dexuan Cui <decui@microsoft.com>
Newsgroups	linux.kernel
Subject	RE: [REGRESSION, bisect] net: ipv6: unregister_netdevice: waiting for lo to become free. Usage count = 2
Date	2016-03-03 06:30 +0100
Message-ID	<r8tZM-2hu-11@gated-at.bofh.it> (permalink)
References	<r8lIR-4R2-9@gated-at.bofh.it> <r8lIR-4R2-11@gated-at.bofh.it> <r8lIR-4R2-7@gated-at.bofh.it> <r8mbV-5gA-13@gated-at.bofh.it> <r8qfw-84R-9@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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> 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

This works for me too! Thanks!

Thanks,
-- Dexuan

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[REGRESSION, bisect] net: ipv6: unregister_netdevice: waiting for lo  to become free. Usage count = 2 Jeremiah Mahler <jmmahler@gmail.com> - 2016-03-02 21:40 +0100
  Re: [REGRESSION, bisect] net: ipv6: unregister_netdevice: waiting for  lo to become free. Usage count = 2 David Ahern <dsa@cumulusnetworks.com> - 2016-03-02 22:10 +0100
    Re: [REGRESSION, bisect] net: ipv6: unregister_netdevice: waiting  for lo to become free. Usage count = 2 Jeremiah Mahler <jmmahler@gmail.com> - 2016-03-03 02:30 +0100
      RE: [REGRESSION, bisect] net: ipv6: unregister_netdevice: waiting for  lo to become free. Usage count = 2 Dexuan Cui <decui@microsoft.com> - 2016-03-03 06:30 +0100

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