Hy-FiX - Fast In-place upgrade of KVM hypervisors.

Hypervisors are critical components in cloud data centers. Maintaining up-to-date KVM hypervisors requires replacing the host kernel, hence rebooting the physical host with consequent termination of running virtual machines (VMs). We introduce Hy-FiX, an in-place upgrade tool for KVM hypervisors that applies host kernel and/or user-space components upgrades while transparently preserving running VMs, constituting a better alternative for platforms where VMs are inevitably terminated and restarted.