Hello,
I have several questions regarding paging.
* I dont understand the reasons behind pte_offset_kernel() and
pte_offset_map(), their purposes, and so on ? One is to be used with addr
from kernelspace while the other it to be used for addresses in user land ?
So, what is the right way to get the PTE given a dir and a vaddr (the pte,
not the page descriptor) ?
The same with PMD (on x86_64)
* Given a process, I can get its PGD through t->mm->pgd, and then browse the
different level of paging to reach the page descriptor. But now, I'd like to
read what is written at a given logical address for this process, how can I
do that?
I need to be sure the page is mapped somewhere, and also I need to know
where ...
* Is there a way to know who is using a given page?
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