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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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