page table modification

Question

Should we have to change the mode while modifying the page table?

Comments

why not when you write memory then u have to change the mode from user to kernal . otherwise anyone can use memory and modify it . Memory related task done in Kernal mode only.

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yes its chenge the mode from user to kernal, because all memery related modification done only in kernal mode only.

may this is help u

http://www.tldp.org/LDP/tlk/mm/memory.html

Answer 1

User processes cannot modify page tables and modification to page table only possible in kernel mode