[cache_miss]

If the kernel parts are confusing you, I highly recommend "Linux Kernel Development" by Robert Love as a high-level introduction to the kernel architecture.

If you like that, proceed to "Linux Kernel Architecture" by Wolfgang Mauerer. The first chapter contains information similar to this article, but at a much greater level of detail.

[cphuntington97]

Have you read Operating Systems: Design and Implementation?

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I haven't, but I've been meaning to read at least one of his books.