Show HN: DOOM in the kernel, or fibers in eBPF
Summary
A deep-dive technical write-up about running DOOM inside the Linux kernel using a BPF Capsule approach. The article explains eBPF verifier constraints, the concept of regions and fibers, and how a large C program can be transformed to run within kernel BPF limits. It also presents performance measurements across multiple runtimes and discusses the broader implications for kernel safety and compiler verification.