Questions about page-tables
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x86 address space calculation PAE to 36 bits
I'm having some hard time understanding PAE. I know it creates a 3rd level of indirection via the PDPT, so that the address translation goes from CR3 -> PDPT(4 entries) -> PD(512 entries) -> ...
user16469617
Votes: 0
Answers: 1
The reset of page table
In arch/arm/kernel/head.S,I found following code
__create_page_tables:
pgtbl r4, r8
mov r0, r4
mov r3, #0
add r6, r0, #PG_DIR_SIZE
1: str r3, [r0]， #4
str r3, [r0]， #4...
Yanel
Votes: 0
Answers: 0
Does virt_to_pfn checks whether the page table exists or not
Does virt_to_pfn checks whether the page table is present or not. Below is the code which is failing with page fault.
#include <linux/module.h>
#define address 0xf0000000
int init_module(void)
...
md.jamal
Votes: 0
Answers: 1
How to know if a page table entry has been modified in XV6?
I'm trying to implement On Demand paging with NRU (not recently used) algorithm.
It picks a page table entry based on two factors:
If it has been referenced recently.
If it has been modified at all.
...
Arturo
Votes: 0
Answers: 0