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
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) 20358.123989] remove /devices/ LNXSYSTM: 00/LNXSYBUS: 00/PNP0A03: 00/device: 07/VMBUS: 01/vmbus_ 6722212 (vmbus) virtual/ misc/vmbus! hv_vss (misc) 20358.124336] add /devices/ LNXSYSTM: 00/LNXSYBUS: 00/PNP0A03: 00/device: 07/VMBUS: 01/vmbus_ 6722213 (vmbus) LNXSYSTM: 00/LNXSYBUS: 00/PNP0A03: 00/device: 07/VMBUS: 01/vmbus_ 6722212 (vmbus) 20358.124403] add /devices/ virtual/ misc/vmbus! hv_vss (misc) LNXSYSTM: 00/LNXSYBUS: 00/PNP0A03: 00/device: 07/VMBUS: 01/vmbus_ 6722213 (vmbus) virtual/ misc/vmbus! hv_vss (misc)
KERNEL[
UDEV [20358.124105] remove /devices/
KERNEL[
UDEV [20358.124356] remove /devices/
KERNEL[
UDEV [20358.124753] add /devices/
UDEV [20358.124853] add /devices/
So I remove all wily kernel and back to vivid kernel then everything back to normal