Explore the challenges of testing the Linux kernel at scale and discover Virter, an open-source tool designed to simplify virtual machine management for kernel-level software testing. Learn how LINBIT developed this "Docker for VMs" to address the unique requirements of kernel testing, which cannot be accomplished using containers alone. Gain insights into Virter's practical applications, including its ability to provision, clone, and run virtual machines efficiently, enabling the execution of approximately 40,000 VM instances daily for testing purposes. Understand the journey that led to Virter's creation and how it can potentially enhance your own Linux kernel testing workflow.