From: tytso@athena.mit.edu (Theodore Y. Ts'o) Subject: Re: Shadow Memory Date: 21 Jan 1993 00:19:42 GMT
In article <1993Jan20.153835.17784@aristo.tau.ac.il> flibedin@libra.math.tau.ac.il (Libedinsky Fernando (Amiram)) writes:
>I would like to know if Linux is able to use the shadow memory of the
>computer. I have 6M in the board, and 344K of shadow which the kernel
>reports as reserved.
Well, Linux *could* be able to use some of that memory, if it isn't
being used for something else. Say, like the memory for the video
card.
Which areas of the shadow memory is safe, and what isn't, is highly
system dependant, and so configuration would be a nightmare. Can you
imagine hundreds and thousands of postings from confused user who
couldn't boot Linux on their system because they they goofed up the
Linux equivalent of "EMMexclude"? So at the moment, it doesn't even try
to use that area of memory. However, if you want to try, you can mess
with the code in mem_init(). Just don't say I didn't warn you.....
- Ted