eBPF Rewrites Linux

Short summary

eBPF enables safe, programmable code to execute directly in the Linux kernel with near-zero overhead, replacing traditional userspace tracing tools. It powers modern infrastructure tools like Cilium for Kubernetes networking at scale and Pixie for automatic observability without code changes. Key considerations include requiring Linux 5.x+ kernels and less mature debugging tooling compared to userspace alternatives.

• •eBPF runs in kernel context with near-zero overhead, eliminating costly context switches between userspace and kernel
• •Powers infrastructure tools like Cilium and Pixie; replaces sequential iptables rule evaluation with kernel-bypass code paths that scale linearly
• •Requires Linux 5.x+ kernel; debugging tooling is less mature than userspace approaches

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