Hi Dan, to answer your questions: 1) Yes, it was full output before next "waiting for..." message 2) If I leave the box running (and stops generating the load), it actually does not recover itself at all. It keeps outputing the "waiting for..." forever with the same device:
# dmesg | grep waiti [35684.449735] unregister_netdevice: waiting for lo (netns ffff88cd026e0000) to become free. Usage count = 1 [35694.529742] unregister_netdevice: waiting for lo (netns ffff88cd026e0000) to become free. Usage count = 1 [35704.609742] unregister_netdevice: waiting for lo (netns ffff88cd026e0000) to become free. Usage count = 1 [35714.689748] unregister_netdevice: waiting for lo (netns ffff88cd026e0000) to become free. Usage count = 1 [35724.769751] unregister_netdevice: waiting for lo (netns ffff88cd026e0000) to become free. Usage count = 1 [35734.849759] unregister_netdevice: waiting for lo (netns ffff88cd026e0000) to become free. Usage count = 1 [35744.929763] unregister_netdevice: waiting for lo (netns ffff88cd026e0000) to become free. Usage count = 1 [35755.009758] unregister_netdevice: waiting for lo (netns ffff88cd026e0000) to become free. Usage count = 1 [35765.089759] unregister_netdevice: waiting for lo (netns ffff88cd026e0000) to become free. Usage count = 1 [35775.169756] unregister_netdevice: waiting for lo (netns ffff88cd026e0000) to become free. Usage count = 1 [35785.249761] unregister_netdevice: waiting for lo (netns ffff88cd026e0000) to become free. Usage count = 1 [35795.329763] unregister_netdevice: waiting for lo (netns ffff88cd026e0000) to become free. Usage count = 1 [35805.409758] unregister_netdevice: waiting for lo (netns ffff88cd026e0000) to become free. Usage count = 1 [35815.489753] unregister_netdevice: waiting for lo (netns ffff88cd026e0000) to become free. Usage count = 1 [35825.569749] unregister_netdevice: waiting for lo (netns ffff88cd026e0000) to become free. Usage count = 1 [35835.649747] unregister_netdevice: waiting for lo (netns ffff88cd026e0000) to become free. Usage count = 1 [35845.729752] unregister_netdevice: waiting for lo (netns ffff88cd026e0000) to become free. Usage count = 1 [35855.809741] unregister_netdevice: waiting for lo (netns ffff88cd026e0000) to become free. Usage count = 1 [35865.889736] unregister_netdevice: waiting for lo (netns ffff88cd026e0000) to become free. Usage count = 1 [35875.969733] unregister_netdevice: waiting for lo (netns ffff88cd026e0000) to become free. Usage count = 1 [35886.049726] unregister_netdevice: waiting for lo (netns ffff88cd026e0000) to become free. Usage count = 1 [35896.129717] unregister_netdevice: waiting for lo (netns ffff88cd026e0000) to become free. Usage count = 1 I am happy to continue testing with a new kernel. Cheers Jirka H. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1711407 Title: unregister_netdevice: waiting for lo to become free Status in linux package in Ubuntu: In Progress Status in linux source package in Trusty: In Progress Status in linux source package in Xenial: In Progress Status in linux source package in Zesty: In Progress Status in linux source package in Artful: In Progress Status in linux source package in Bionic: In Progress Bug description: 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. -- [Impact] 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 = 1 This can cause issues when trying to create net network namespace and thus block a user from creating new containers. [Test Case] See comment 16, reproducer provided at https://github.com/fho/docker- samba-loop To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1711407/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
