Linux kernel live debugging, how it's done and what tools are used?

Question

What are the most common and why not uncommon methods and tools used to do live debugging on the Linux kernel? I know that Linus for eg. is against this kind of debugging fo

Answer 1

As someone who writes kernel code a lot I have to say I have never used kgdb, and only rarely use kprobes etc.

It is still often the best approach to throw in some strategic printks. In more recent kernels trace_printk is a good way to do that without spamming dmesg.