I've also tried with 3 VMs each with 30G qcow2 and raw formatted drives, still with no success in trying to reproduce.
Please give the full kvm command (and, if using libvirt, libvirt.xml files) for the hosts which cause this problem. Are you using ecryptfs to back the guest image files? ** Changed in: kvm (Ubuntu) Status: In Progress => Incomplete -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to kvm in ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs