Maximum Memory available to Kernel

Norman Gaywood norm at
Tue Jan 14 16:23:01 CST 2003

On Tue, Jan 14, 2003 at 09:45:32AM -0600, Philip_Olenick at wrote:
> Hi, I need to understand, using IA32 architecture (Dell PE platforms), what
> is the maximum amount of memory that the Linux Kernels can address?
> Per RH 7.3? RH8.0? Advanced Server 2.1?

I'm running a PE6600 with 16GB of RAM with RH8.0. With this setup it is
quite easy to trigger a VM problem by simply copying a large amount of
data. In this state the 2.4.18 kernel can go from slow to unusable quite

The 2.4.20 kernel from the RH beta improves things. We still get a
slowdown but the system can be recovered.


Norman Gaywood -- School of Mathematical and Computer Sciences
University of New England, Armidale, NSW 2351, Australia
norm at
Phone: +61 2 6773 2412     Fax: +61 2 6773 3312

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