Linux Kernel Debugging
Linux kernel debugging is the disciplined investigation of faults inside the operating-system kernel: crashes, hangs, unexpected behavior, and bad interactions with hardware or drivers. It combines evidence from logs, tracing, symbols, and, when needed, an attached kernel debugger.
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Intro
Linux Kernel Debugging
Kernel debugging starts with a boundary: is the fault in the kernel, a module, firmware, hardware, or user space? Treat that question as a hypothesis, not a conclusion. A kernel panic, an oops, a lockup warning, or a corrupted result is evidence. Preserve it before a reboot, then narrow the path that led there.
Most investigations do not begin with an interactive debugger. Begin with the least disruptive evidence: the kernel log, the exact kernel build, the loaded modules, the workload, and a reliable reproduction. A stack trace becomes useful when symbols match the running kernel. A trace becomes useful when it captures the relevant event path without changing timing so much that the bug vanishes.
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