64 Bit Linux shows 4GB... was Using all of 4GB RAM...

[Alan Cox]

> Then why does it say 32-bit operating systems?  64-bit operating systems
> have baseline memory demands too.

What is usually going on in those cases is that with 4GB RAM you need
some space for PCI etc below the 4GB boundary, that means part of the RAM
has to be mapped above the 4GB boundary which most 32bit OS can't reach
(hugemem Linux kernels can but there is a big performance cost to such
antics)