Towards an immortal operating system in virtual environments.

•We show how a commercial OS can be successfully recovered from a crash.•Support from the virtualization layer (Hypervisor) can significantly help in diagnosis and recovery of the OS.•We evaluate the time taken to automatically recover from an OS crash for different workloads.•This technology can significantly reduce the downtime and maintenance costs in data centers.•This technology can be easily integrated into the support operations of OS vendors.