redhat ES 3.0 memory query

I have 4GB RAM running RHES3.0 Linux 2.4 kernel. I've been told that
there is a 3GB/1GB memory split with 3GB being available for user
processes and 1GB for kernel processes.
Is this correct and is there any docn for it anywhere?

thanks

This CAN be true. Usually is. If you don't want it then you
recompile your kernel to get rid of the split, and use CONFIG_NOHIGHMEM

There are three options. off, 4 giges and 64 giges. If you have or
desire to use over 1 gige RAM but less than 4, choose 4 giges. 64 giges
requires CPU's that have a feature called PAE which is Pentium Pro or
better.

man bootparam should tell you more. "mem= " is a dangerous option. I
don't know if it is meant to work below one gige with CONFIG_NOHIGHMEM
set to off.

EC<:-}

Nick wrote:[color=blue]
> I have 4GB RAM running RHES3.0 Linux 2.4 kernel. I've been told that
> there is a 3GB/1GB memory split with 3GB being available for user
> processes and 1GB for kernel processes.
> Is this correct and is there any docn for it anywhere?
>
> thanks[/color]

If you are setting by make config, what I believe you do is set
HIGHMEM_CONFIG to 4G, say, and also HIGHMEM_IO to y.

EC<:-}

Nick wrote:[color=blue]
> I have 4GB RAM running RHES3.0 Linux 2.4 kernel. I've been told that
> there is a 3GB/1GB memory split with 3GB being available for user
> processes and 1GB for kernel processes.
> Is this correct and is there any docn for it anywhere?
>
> thanks[/color]