Re: pentium 4MB pages question for you MMU hackers

Andrew E. Mileski (
Fri, 3 Jan 1997 17:03:07 -0500 (EST)

> Id like to ask a dumb question here, before I say something really
> ignorant.
> What is ring0 code? How does it relate to linux/unix?

Ring 0 = supervisor or kernel mode (unrestricted access)
Ring 3 = user mode (restricted access)

All unices operate in two modes. The Intel ix86 supports 4 "modes"
or "rings", or "levels", so only the two extremes are used.

> What are GGI's?

Why not try a WEB SEARCH next time - The Internet is an amazing thing :-)

GGI = General Graphics Interface

> If ring0 is what I think it is, this could make 1997 very long and ugly.


Andrew E. Mileski
Linux Plug-and-Play Kernel Project
XFree86 Matrox Team