[PATCH 0/8] RSS controller based on process containers (v2)

Adds RSS accounting and control within a container.

Major change: current scanner code reuse.

Tasks and files accounting is not included as these containers
are simple enough to be implemented later.

Based on top of Paul Menage's container subsystem v8.
Note, that only first three patches from Paul's patchset should
be used as BeanCounters, CPU accounting etc are not needed for
RSS container.

RSS container includes the per-container RSS accounting and
reclamation, and out-of-memory killer. The container behaves like
a standalone machine - when it runs out of resources, it tries to
reclaim some pages, and if it doesn't succeed, kills some task
which mm_struct belongs to the container in question.

Changes from previous version:
* reclamation code reuse. I.e. the scanner code used to reclaim
  pages on global memory shortage is used as-is in per-container
  page reclamation;
* active/inactive per-container lists (a bit reworked patch
  from Balbir);
* more elegant top container creation (thanks Paul for clarifying).
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---

• Follow-Ups:
  • Re: [PATCH 0/8] RSS controller based on process containers (v2)
    • From: Peter Zijlstra <[email protected]>
  • [PATCH 7/8] Page scanner changes needed to implement per-container scanner
    • From: Pavel Emelianov <[email protected]>
  • [PATCH 5/8] RSS accounting hooks over the code
    • From: Pavel Emelianov <[email protected]>
  • [PATCH 8/8] Per-container pages reclamation
    • From: Pavel Emelianov <[email protected]>
  • [PATCH 6/8] Per container OOM killer
    • From: Pavel Emelianov <[email protected]>
  • [PATCH 4/8] RSS container core
    • From: Pavel Emelianov <[email protected]>
  • [PATCH 3/8] Add container pointer on mm_struct
    • From: Pavel Emelianov <[email protected]>
  • [PATCH 2/8] Add container pointer on struct page
    • From: Pavel Emelianov <[email protected]>
  • [PATCH 1/8] Resource counters
    • From: Pavel Emelianov <[email protected]>

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