mtrr-readme This patch provides a mechanism to modify the MTRRs (Memory Type Range Registers) on Intel Pentium Pro systems and other processors supporting MTRRs. Using this, you can turn write-combining on for your VGA frame buffer and get 2.5 times speedup (typical) or more. The patch includes Documentation/mtrr.txt which gives more detail and includes examples of how to manipulate /proc/mtrr from the shell and from a C programme. NOTE: kernel 2.1.99 included mtrr-patch-v1.18, so all subsequent patches will be much smaller, as most of the code is already in the kernel. The latest patch is against 2.1.122-pre1.