My OS does not use more than 4 GB of RAM

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"My OS does not use more than 4 GB of RAM" - Murat Balaban - (2006-09-08 09:39:23) [6338]

In 32-bit architectures, maximum addressable memory with 32-bit pointers is 2^32 (4GB).

So, this is the architecture's limitation not the Operating System's.

However, Intel provides Physical Addressing Extensions (PAE) to make use of more than 4 GB of Read Only Memory.

To utulize PAE in your Linux system, you need to turn on CONFIG_HIGHMEM kernel configuration option.

For FreeBSD, this is done by using PAE kernel konfiguration file located at /usr/src/sys/i386/conf/PAE. Be warned that most of the device drivers are disabled in this kernel configuration.

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