[TriLUG] >4 GB HIMEM Question

[Mike Johnson]

James wrote:
> I have a dual Opteron (AMD64) machine that has 8 GB of memory installed
> and needs to utilize all 8 GB.
> 
> However, currently the processors are running in 32 bit compatibility mode
> under 32 bit RHE.  So my question is: would it be possible to recompile
> the kernel as 32 bit with High Memory support [> 4 GB] (ie. is this an
> Intel only option or will this work on AMD64) or will I have to install a
> 64 bit operating system in order to use all 8 GB?
> 
> Thanks!
> 

We've got a quad Xeon (which is 32bit) with 10GB of RAM using RHEL2.1. 
Seems to be humming along just fine.  What makes you think that it's not 
using all of your memory?

Mike