This repo is a place for experimental code and patches targeting linux 4.6 designed to help me better understand the linux VM subsystem.
This project's sister repo, linux-vm-notes contains notes on the subsystem.
Contains userland experiments for exploring the linux VM.
Pagetables is a kernel module which outputs the precise PGD/PUD/PMD/PTE page table contents for a given process.
It differs from /proc/<pid>/pagemap (doc page) in that pagemap is
vastly more useful :) it allows a process to map between virtual and physical
pages without reference to individual page tables whereas pagetables is
designed to expose these details.
Additionally, pagetables exposes kernel mappings.
$ cd pagetables
$ make
WARNING: Don't use this with a kernel you care about. It's experimental and I've probably made horrific mistakes which will result in data/hair/firstborn loss.
EVEN MORE SERIOUS WARNING: This module is a security nightmare and exposes sensitive data, including kernel mappings and the mappings of any specified process. You've been warned!
$ cd pagetables
$ sudo insmod pagetables.ko
$ sudo ./pagetables <pid, defaults to pagetables itself>
All code here is licensed under GPL v2 to remain compatible with the kernel itself.