Hey all, Have a very basic question here, but it is kind of annoying me. The kernel virtual area ( 3-4GB in virtual address) maps to the first 1GB of physical RAM. But it is so common that we only have a machine of 256MB/512MB etc. What is going on? Thanks a lot! Lei -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/