From 6d12e2d8ddbe653d80ea4f71578481c1bc933025 Mon Sep 17 00:00:00 2001
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Date: Thu, 7 Feb 2008 00:14:31 -0800
Subject: [PATCH] per-zone and reclaim enhancements for memory controller:
 per-zone active inactive counter

This patch adds per-zone status in memory cgroup.  These values are often read
(as per-zone value) by page reclaiming.

In current design, per-zone stat is just a unsigned long value and not an
atomic value because they are modified only under lru_lock.  (So, atomic_ops
is not necessary.)

This patch adds ACTIVE and INACTIVE per-zone status values.

For handling per-zone status, this patch adds
  struct mem_cgroup_per_zone {
		...
  }
and some helper functions. This will be useful to add per-zone objects
in mem_cgroup.

This patch turns memory controller's early_init to be 0 for calling
kmalloc() in initialization.

Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Herbert Poetzl <herbert@13thfloor.at>
Cc: Kirill Korotaev <dev@sw.ru>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Paul Menage <menage@google.com>
Cc: Pavel Emelianov <xemul@openvz.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Cc: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
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