Maximum Memory in Linux

In the past I have had to specify memory amount as a command line option
when linux boots. This is the relevant portion of the lilo man page:

mem=###[,K,M,G]
Specifies the maximum memory in the system in bytes, kilobytes,
megabytes, or gigabytes. This option is not removed from the
command line, and is always passed to the kernel.

rowan

Simper, Brian D wrote:

>Is there a theoretical or functional maximum memory you can put in a
>Linux machine? I have a server with 2GB installed but the free command
>stubbornly says:
>

># free
>             total       used       free     shared    buffers
>cached
>Mem:        902768     672416     230352          0      45820
>193564
>-/+ buffers/cache:     433032     469736
>Swap:       522216      25124     497092

>
>This is Red Hat Linux 9 machine with a stock kernel. Am I missing some
>crucial point? Has anyone else dealt with a lower than expected
>reported memory?
>
>Thanks,
>
>Brian
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