Public bug reported: I read your following post (https://lkml.org/lkml/2019/5/29/309). Is there any other configuration to disable or which patch is required to resolve this issue?
I am facing a very similar issue with almost identical output from dmesg call trace. This occurs with high frequency. It's fairly easy to identify as kworker usage gets stuck very high when the problem occurs, but this manifests into a bigger problem as docker containers cannot start/restart and host requires a reboot to resolve. I have machines running Ubuntu with various kernels (4.15.0-1031-azure through 4.15.0-1041-azure) and problem occurs randomly on every kernel version. Using weave plugins vs docker overlay drivers for swarm scope, docker overlay drivers seem to have the problem more frequently, but weave has same kworker issue with a lower frequency. I have also disabled ipv6 on many nodes, but this doesn't solve the issue either. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.15.0-1040-azure 4.15.0-1040.44 ProcVersionSignature: User Name 4.15.0-1040.44-azure 4.15.18 Uname: Linux 4.15.0-1040-azure x86_64 ApportVersion: 2.20.1-0ubuntu2.18 Architecture: amd64 Date: Fri Jun 7 17:14:08 2019 SourcePackage: linux-signed-azure UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: linux-signed-azure (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug uec-images xenial ** Attachment added: "output.log" https://bugs.launchpad.net/bugs/1832022/+attachment/5269380/+files/output.log -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-signed-azure in Ubuntu. https://bugs.launchpad.net/bugs/1832022 Title: Kworker stuck 100% high Workqueue: netns cleanup_net _raw_spin_lock Status in linux-signed-azure package in Ubuntu: New Bug description: I read your following post (https://lkml.org/lkml/2019/5/29/309). Is there any other configuration to disable or which patch is required to resolve this issue? I am facing a very similar issue with almost identical output from dmesg call trace. This occurs with high frequency. It's fairly easy to identify as kworker usage gets stuck very high when the problem occurs, but this manifests into a bigger problem as docker containers cannot start/restart and host requires a reboot to resolve. I have machines running Ubuntu with various kernels (4.15.0-1031-azure through 4.15.0-1041-azure) and problem occurs randomly on every kernel version. Using weave plugins vs docker overlay drivers for swarm scope, docker overlay drivers seem to have the problem more frequently, but weave has same kworker issue with a lower frequency. I have also disabled ipv6 on many nodes, but this doesn't solve the issue either. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.15.0-1040-azure 4.15.0-1040.44 ProcVersionSignature: User Name 4.15.0-1040.44-azure 4.15.18 Uname: Linux 4.15.0-1040-azure x86_64 ApportVersion: 2.20.1-0ubuntu2.18 Architecture: amd64 Date: Fri Jun 7 17:14:08 2019 SourcePackage: linux-signed-azure UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-azure/+bug/1832022/+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