FWIW here is an update of what I've tried in the last couple months trying to fix this problem (unsuccessfully):
- We tried to deny packets to the container's network before we destroy the namesapce - Backported the patch mentioned in the previous comment to ubuntu kernel 3.19 and 4.2 (linux-lts-vivid and linux-lts-wily) - Applied patches listed in this thread: http://www.spinics.net/lists/netdev/msg345205.html on trusty kernel, vivid kernel already has - 4.4-rc3 net-next branch All experiments above failed to fix the problem and the bug was triggered in production machines within 24h using these experimental kernels. We still can't reliably reproduce this issue outside production but it is easy to validate any proposed solution with a few hours of production load. Rodrigo. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1403152 Title: unregister_netdevice: waiting for lo to become free. Usage count To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1403152/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
