I've been writing an occasional "Ask a kernel maintainer" column on the lwn.net weekly kernel page. It's been a while since I last wrote one, so I figured it's time to start it up again.
So, consider this an open request for questions that you've always wondered, but never knew who to ask, or how to find the answer to, that you have had about the Linux kernel.
Note, any question that can easily be answered by reading either the Documentation/HOWTO or Documentation/SubmittingPatches or Documentation/CodingStyle files in the Linux kernel source code are not eligible. You should read them first before asking.