Where can I find some info on the theory of rmap? Is it the same as/or variation of inverted page tables? I have searched his page and google and haven't found any info on it. Tom -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ IRC Channel: irc.openprojects.net / #kernelnewbies Web Page: http://www.kernelnewbies.org/