[PATCH] docs/admin-guide/mm: add high level concepts overview

[Mike Rapoport]

Hi,

The below patch describes some of the concepts in Linux mm. It does not aim
to provide in-depth description of the mm internals, but rather help
unprepared reader to understand cryptic texts, e.g.
Documentation/sysctl/vm.txt.

I covered what seemed to me the essential minimum that is required for
user/administrator to read the existing docs without searching the web for
the explanations for every other term.

--
Sincerely yours,
Mike.