SRU Justification:

[Impact]

Users of kernels that utilize NFS may see the following messages when shutting down and starting containers:

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

This can cause issues when trying to create net network namespace and thus block a user from creating new containers.

[Test Case]

Setup multiple containers in parallel to mount and NFS share, create some traffic and shutdown. Eventually you will see the kernel message.

Dave's scr...