And we're on our way down the rabbit hole...
netns exit is blocked by reference from interface...
interface exit is blocked by reference from dst object...
dst object free is blocked by reference from ???...
I'll set up more dbg and have a new test kernel, probably by Monday.
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unregister_netdevice: waiting for lo to become free
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This is a "continuation" of bug 1403152, as that bug has been marked
"fix released" and recent reports of failure may (or may not) be a new
bug. Any further reports of the problem should please be reported
here instead of that bug.
When shutting down and starting containers the container network
namespace may experience a dst reference counting leak which results
in this message repeated in the logs:
unregister_netdevice: waiting for lo to become free. Usage count =
This can cause issues when trying to create net network namespace and
thus block a user from creating new containers.
See comment 16, reproducer provided at https://github.com/fho/docker-
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