24 Feb
2004
24 Feb
'04
19:01
"Carl Peto"
This simply means that the kernel can handle up to 64GB of physical RAM (but can also handle smaller amounts too). Why isn't this always switched on? Kernels with this paging active will not run on old processors (pre Pentium Pro).
The kernel can address up to 64 GB, but individual processes are still limited to 4 GB. And on many systems ~ 3.5 GB of physical memory is the maximum as the BIOS reserves space for PCI and AGP aperture. Philipp