Confirm that this bug happen to me too. I'm using Ubuntu 14.04.3 LTS and install new Kernel with command
sudo apt-get install -y linux-generic-lts-wily linux-tools-virtual-lts- wily linux-cloud-tools-virtual-lts-wily hv-kvp-daemon-init Then reboot to get new Kernel 4.2.0-18-generic then systemd-udevd got high cpu usage instantly. If I run the command "udevadm monitor" it will show a lot of these repeat all the time. UDEV [20358.123891] add /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:07/VMBUS:01/vmbus_6722212 (vmbus) KERNEL[20358.123989] remove /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:07/VMBUS:01/vmbus_6722212 (vmbus) UDEV [20358.124105] remove /devices/virtual/misc/vmbus!hv_vss (misc) KERNEL[20358.124336] add /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:07/VMBUS:01/vmbus_6722213 (vmbus) UDEV [20358.124356] remove /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:07/VMBUS:01/vmbus_6722212 (vmbus) KERNEL[20358.124403] add /devices/virtual/misc/vmbus!hv_vss (misc) UDEV [20358.124753] add /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:07/VMBUS:01/vmbus_6722213 (vmbus) UDEV [20358.124853] add /devices/virtual/misc/vmbus!hv_vss (misc) So I remove all wily kernel and back to vivid kernel then everything back to normal -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1496927 Title: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1496927/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
