For now just the content copied from the old linux-mm site. Please update and include links to Linux memory management documentation elsewhere.
VirtualMemory an irc log with answers to often asked questions.
HighMemory or how the Linux kernel can use more than 1GB of physical memory.
External documents
Joe Knapka's [http://home.earthlink.net/~jknapka/linux-mm/vmoutline.html Outline of the Linux Memory Management System], which is mostly about the 2.4 kernel.