Comment 48 for bug 1711407

> was able to get "unregister_netdevice: waiting for lo to become free. Usage count = 1"
> in less than 5 minutes :-(

well, that's unfortunate that you still see it but fortunate that you're able to reproduce it quickly. The issue that I fixed - TCP kernel socket staying open - is certainly not the only way to encounter the problem.

> Our environment spawns about 1 container a second that does either openvpn (both udp and tcp)
> or ipsec tunnel testing.

That's good to know; my guess would be ipsec, but of course will require investigation. I'll try reproducing separately with openvpn and ipsec also.

> PLease let me know how to enable the debug messages

the previous builds did have some dbg messages, but I removed them for the last build, so I'll need to add dbg again and spin new kernel builds. I'll update this bug once dbg kernel(s) are ready.