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
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