Memory controller: accounting setup

Basic setup routines, the mm_struct has a pointer to the cgroup that
it belongs to and the the page has a page_cgroup associated with it.

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

3 files changed, 43 insertions, 0 deletions

diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 3f121b27677a..7d1f119c796e 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -3,6 +3,9 @@
  * Copyright IBM Corporation, 2007
  * Author Balbir Singh <balbir@linux.vnet.ibm.com>
  *
+ * Copyright 2007 OpenVZ SWsoft Inc
+ * Author: Pavel Emelianov <xemul@openvz.org>
+ *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
@@ -17,5 +20,38 @@
 #ifndef _LINUX_MEMCONTROL_H
 #define _LINUX_MEMCONTROL_H
 
+struct mem_cgroup;
+struct page_cgroup;
+
+#ifdef CONFIG_CGROUP_MEM_CONT
+
+extern void mm_init_cgroup(struct mm_struct *mm, struct task_struct *p);
+extern void mm_free_cgroup(struct mm_struct *mm);
+extern void page_assign_page_cgroup(struct page *page,
+                                        struct page_cgroup *pc);
+extern struct page_cgroup *page_get_page_cgroup(struct page *page);
+
+#else /* CONFIG_CGROUP_MEM_CONT */
+static inline void mm_init_cgroup(struct mm_struct *mm,
+                                        struct task_struct *p)
+{
+}
+
+static inline void mm_free_cgroup(struct mm_struct *mm)
+{
+}
+
+static inline void page_assign_page_cgroup(struct page *page,
+                                                struct page_cgroup *pc)
+{
+}
+
+static inline struct page_cgroup *page_get_page_cgroup(struct page *page)
+{
+        return NULL;
+}
+
+#endif /* CONFIG_CGROUP_MEM_CONT */
+
 #endif /* _LINUX_MEMCONTROL_H */
 
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index f4c03e0b355e..34023c65d466 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -88,6 +88,9 @@ struct page {
         void *virtual;                  /* Kernel virtual address (NULL if
                                            not kmapped, ie. highmem) */
 #endif /* WANT_PAGE_VIRTUAL */
+#ifdef CONFIG_CGROUP_MEM_CONT
+        unsigned long page_cgroup;
+#endif
 };
 
 /*
@@ -219,6 +222,9 @@ struct mm_struct {
         /* aio bits */
         rwlock_t                ioctx_list_lock;
         struct kioctx           *ioctx_list;
+#ifdef CONFIG_CGROUP_MEM_CONT
+        struct mem_cgroup *mem_cgroup;
+#endif
 };
 
 #endif /* _LINUX_MM_TYPES_H */
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 7c8ca05c3cae..8a4812c1c038 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -92,6 +92,7 @@ struct sched_param {
 
 #include <asm/processor.h>
 
+struct mem_cgroup;
 struct exec_domain;
 struct futex_pi_state;
 struct robust_list_head;