Linux kernel memory and split on 64-bit machines

Hi,

I am researching now about the Linux kernel memory on 64-bit (x86_64) machines. I am looking into answering the following questions:

1. Is there a user-kernel split on 64-bit memories? If so, how is it done? What is the size of each part?

2. Does kernel high memory exists on 64-bit machines?

3. How is it possible to detect in runtime the split and the size of the physical memory?

Thanks,


Yoav

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