Re: unregister_netdevice: waiting for eth0 to become free. Usage count = 1

From	Wei Wang <weiwan@google.com>
Newsgroups	linux.kernel
Subject	Re: unregister_netdevice: waiting for eth0 to become free. Usage count = 1
Date	2017-08-10 22:10 +0200
Message-ID	<ud1Wi-2eA-5@gated-at.bofh.it> (permalink)
References	(4 earlier) <ucJG1-6yK-1@gated-at.bofh.it> <ucKsq-768-11@gated-at.bofh.it> <ucKC5-79t-1@gated-at.bofh.it> <ucOw2-1gs-13@gated-at.bofh.it> <ud0dQ-Jr-17@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Thu, Aug 10, 2017 at 11:12 AM, John Stultz <john.stultz@linaro.org> wrote:
> On Wed, Aug 9, 2017 at 10:41 PM, Wei Wang <weiwan@google.com> wrote:
>> Hi John,
>>
>> Is it possible to try the attached patch?
>
> Thanks so much for the quick turn around!
>
> So I dropped all the reverts you suggested, and applied this one
> against 4.13-rc4, but I'm still seeing the problematic behavior.
>

Thanks for confirming.
I have been going through the code and not yet found any leaks.
I am also trying to reproduce the issue myself.
Martin seems to also see this issue.
I will continue investigating.

>> I am not sure if it actually fixes the issue. But I think it is worth a try.
>> Also, could you get me all the ipv6 routes when you plug in the usb
>> using "ip -6 route show"? (If you have multiple routing tables
>> configured, could you dump them all?)
>
> # ip -6 route show
> 2601:1c2:1002:83f0::/64 dev eth0  proto kernel  metric 256  expires
> 345599sec pref medium
> fe80::/64 dev eth0  proto kernel  metric 256  pref medium
> default via fe80::200:caff:fe11:2233 dev eth0  proto ra  metric 1024
> expires 1799sec hoplimit 64 pref medium
>
>
> After unplugging the device (and getting the unregister_netdevice errors):
> # ip -6 route show
> #
>

Thanks for the logs.


>
> thanks
> -john

Thread

unregister_netdevice: waiting for eth0 to become free. Usage count = 1 John Stultz <john.stultz@linaro.org> - 2017-08-07 23:10 +0200
  Re: unregister_netdevice: waiting for eth0 to become free. Usage  count = 1 John Stultz <john.stultz@linaro.org> - 2017-08-07 23:20 +0200
    Re: unregister_netdevice: waiting for eth0 to become free. Usage  count = 1 Cong Wang <xiyou.wangcong@gmail.com> - 2017-08-10 01:40 +0200
      Re: unregister_netdevice: waiting for eth0 to become free. Usage  count = 1 John Stultz <john.stultz@linaro.org> - 2017-08-10 01:50 +0200
        Re: unregister_netdevice: waiting for eth0 to become free. Usage  count = 1 Wei Wang <weiwan@google.com> - 2017-08-10 02:40 +0200
          Re: unregister_netdevice: waiting for eth0 to become free. Usage  count = 1 John Stultz <john.stultz@linaro.org> - 2017-08-10 02:50 +0200
          Re: unregister_netdevice: waiting for eth0 to become free. Usage  count = 1 John Stultz <john.stultz@linaro.org> - 2017-08-10 03:30 +0200
            Re: unregister_netdevice: waiting for eth0 to become free. Usage  count = 1 Wei Wang <weiwan@google.com> - 2017-08-10 03:40 +0200
              Re: unregister_netdevice: waiting for eth0 to become free. Usage  count = 1 Wei Wang <weiwan@google.com> - 2017-08-10 07:50 +0200
                Re: unregister_netdevice: waiting for eth0 to become free. Usage  count = 1 John Stultz <john.stultz@linaro.org> - 2017-08-10 20:20 +0200
                Re: unregister_netdevice: waiting for eth0 to become free. Usage  count = 1 Wei Wang <weiwan@google.com> - 2017-08-10 22:10 +0200
                Re: unregister_netdevice: waiting for eth0 to become free. Usage  count = 1 Cong Wang <xiyou.wangcong@gmail.com> - 2017-08-11 18:50 +0200
                Re: unregister_netdevice: waiting for eth0 to become free. Usage  count = 1 Wei Wang <weiwan@google.com> - 2017-08-11 19:30 +0200

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