Re: process max virtual memory limit in amd64?
On Friday 25 June 2004 12:13, Anders Fugmann wrote:
> Gabriel Ebner wrote:
> > On Fri, Jun 25, 2004 at 10:46:05AM +0300, Georgi Guninski wrote:
> > gebner@schnecke2 ~ [0] $ grep 'address sizes' /proc/cpuinfo
> > address sizes : 40 bits physical, 48 bits virtual
>
> Does anyone know why there is a limitation of 48 bits on the virtual
> address space, and if it is technically possible to have a 64 bit
> address space on the AMD64 architecture?
The amd64 architecture allows the full 64-bit memory address space, although
it doesn't require all of it to be implemented.
The 48-bit virtual and 40-bit physical limits are just limitations of the
current implementation (ie Opteron/Athlon 64 CPUs).
Paul
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