Linux RAM problem

Hello, I'm having a problem with linux using 2.5GB of ram. Linux does not detect it, it seems to be capping out at 883MB. I think is should be able to detect the memory. I tried doing mem=2560 (is some measurement needed like mb or kb?) on grub, simply crashed when uncompressing the kernel. I have no idea what is wrong.

Axle

try setting high amounts of memory on (its not called that)

but its in the kernel config im pretty sure

yup, in the kernel...

HIMEM

Ok thanks, I was kind of wondering about the High Memory in the kernel.

EDIT: I got it to work, thanks for your help!

Axle