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

On Thu, Aug 10, 2017 at 11:12 AM, John Stultz [off-list ref] wrote:

On Wed, Aug 9, 2017 at 10:41 PM, Wei Wang [off-list ref] wrote:

quoted

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.

quoted

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