> the CPU usage is zero, there is nothing popping up. The tasks causing the > high load > value are in D state
ok that seems expected then. This doesn't 'fix' the problem of the leaked dst (and namespace), just prevents blocking further net namespace creation/deletion. > if I can't run out of some resources (kworker threads?) there is a limit, yes, and once it's hit namespace cleanup will essentially stop, and all further net namespaces will be leaked. However, there's really just no way to avoid that without fixing the actual dst leaks, which I'd still like to try to add debug to help identify. I've been busy elsewhere last week but I'll prepare the patch to send upstream this week, and then look at adding debug to actually find the dst leak. Thanks! -- 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: Won't Fix 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
