docs/admin-guide: introduce basic index for mm documentation

   pm/index

   thunderbolt

   LSM/index

   mm/index

.. only::  subproject and html

=================

Memory Management

=================

Linux memory management subsystem is responsible, as the name implies,

for managing the memory in the system. This includes implemnetation of

virtual memory and demand paging, memory allocation both for kernel

internal structures and user space programms, mapping of files into

processes address space and many other cool things.

Linux memory management is a complex system with many configurable

settings. Most of these settings are available via ``/proc``

filesystem and can be quired and adjusted using ``sysctl``. These APIs

are described in Documentation/sysctl/vm.txt and in `man 5 proc`_.

.. _man 5 proc: http://man7.org/linux/man-pages/man5/proc.5.html

Here we document in detail how to interact with various mechanisms in

the Linux memory management.