I can reproduce it very reliably on my system after shutting down an LXC container with poweroff from inside the container. I'm setting to High because then the container cannot be started again without restarting the host system, and the host system won't shutdown waiting forever for lo to become free. Only SysRq helps in that case.
** Changed in: linux (Ubuntu) Importance: Medium => High ** Tags added: rls-q-incoming -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1021471 Title: stuck on mutex_lock creating a new network namespace when starting a container To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1021471/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs