that's the exception, not the rule right? It's also a example of something that I would absolutely write thorough tests for. I'm also curious how modular it is

that's the exception, not the rule right? It's also a example of something that I would absolutely write thorough tests for. I'm also curious how modular it is. Does a kernel hacker have to keep the structure of that whole set of code in his/her head? I'm guessing there are a lot of clean seams in it that in practice reduce the actual lok related to a project down to a much smaller number.