Bug 212741 - unregister_netdevice: waiting for enp0s20f0u1 to become free.
Summary: unregister_netdevice: waiting for enp0s20f0u1 to become free.
Status: NEW
Alias: None
Product: Networking
Classification: Unclassified
Component: Other (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: Stephen Hemminger
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2021-04-21 08:39 UTC by Arjen Heidinga
Modified: 2021-04-21 08:39 UTC (History)
0 users

See Also:
Kernel Version: 5.11.14
Subsystem:
Regression: No
Bisected commit-id:

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Description Arjen Heidinga 2021-04-21 08:39:38 UTC 
This problem exists for years by now, I could work around it until now. Somewhere around kernel 4.9 ish this problem started to appear.

I have an USB network adapter and whenever the connection is severed (because I touch the cable, USB reset, sleep, cosmic rays) the kernel starts logging below message every 10~ish seconds. The usagecount is always different, but increases with uptime. I can replicate this on all my laptops and workstations.

My setup is quite straigtforward, just (networkmanager)DHCP and a wireguard VPN. Running Fedora 33 (but exists since like 26 or so).


[  992.787930] unregister_netdevice: waiting for enp0s20f0u1 to become free. Usage count = 8113
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