Advanced Kernel Debugging

Purpose

Extend skills/kernel/kernel-debugging with production-grade tracing: ftrace, trace-cmd, kernel perf, kprobes/kretprobes, kgdb, crash dump analysis, and printk discipline. Not merged with kernel-debugging — that skill covers baseline kgdb/dyndbg; this one focuses on trace-cmd, function_graph, and live/post-mortem production workflows.

When to Use

• Latency spikes in kernel driver without obvious bug
• Tracing function call graph in kernel
• Live inspection without recompiling (kprobes, bpf)
• Post-mortem vmcore after panic

Workflow

1. ftrace function graph