physical memory userspace/kernel split on Linux x86-64

Le Tan tamlokveer at gmail.com
Tue May 26 21:12:11 EDT 2015


Hi,
Is there an explict split between userspace and kernel in physical
memory on Linux x86-64? That is, given a physical address, can I tell
whether this address is from userspace or not?
As far as I know, in virtual address space, the kernel will use the
upper half and the userspace will use the lower half. But what about
in physical address space?

Thanks very much!

Le



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