From 072c56c13e1302fcdc39961dc64e76485731ad67 Mon Sep 17 00:00:00 2001
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Date: Thu, 7 Feb 2008 00:14:39 -0800
Subject: [PATCH] per-zone and reclaim enhancements for memory controller:
 per-zone-lock for cgroup

Now, lru is per-zone.

Then, lru_lock can be (should be) per-zone, too.
This patch implementes per-zone lru lock.

lru_lock is placed into mem_cgroup_per_zone struct.

lock can be accessed by
   mz = mem_cgroup_zoneinfo(mem_cgroup, node, zone);
   &mz->lru_lock

   or
   mz = page_cgroup_zoneinfo(page_cgroup);
   &mz->lru_lock

Signed-off-by: KAMEZAWA hiroyuki <kmaezawa.hiroyu@jp.fujitsu.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Balbir Singh <balbir@linux.vnet.ibm.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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