Re: >3G Memory support

[William Lee Irwin III]

On Thu, 20 Jun 2002, Brian Gerst wrote:
>> Hardware limitations imposed by the x86 architecture.  The x86 only has 
>> _one_ virtual address space, which has to be shared by user space and 
>> kernel space.  It is not possible to give user space more virtual 
>> address space without taking it away from the kernel.

On Thu, Jun 20, 2002 at 04:50:26PM +0200, Jirka Kosina wrote:
> You can theoretically run kernel in one task (I mean "task" in the 
> Intel-processor-meaning of the word ;) ) and userspace programs in another 
> task, which will result in having 4GB of memory for both of them, won't 
> it?

This is what BIGMEM did. It predated the current highmem implementation.

Cheers,
Bill