Re: Large memory system

["Stephen C. Tweedie" <sct@redhat.com>]

Hi,

On Sat, 30 Jan 1999 08:36:31 -0500, Daniel Blakeley
<daniel@msc.cornell.edu> said:

> I've jumped the gun a little bit and recommended a Professor buy 4GB
> of RAM on a Xeon machine to run Linux on and he did.  After he got it
> I read the large memory howto which states that the max memory size
> for Linux 2.2.x is 2GB physical/2GB virtual.  The memory size seems to
> limited by the 32bit nature of the x86 architecture.  The Xeon seems
> to have a 36bit memory addressing mode.  Can Linux be easily expanded
> to use the 36bit addressing?

It's not exactly trivial, but it can (and will) be done.  For now, you
can only use 4G on a 64-bit architecture (Alpha or Sparc64), but
basically we know how to address it on Intel too, transparently to the
user.

--Stephen
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