Memory controller: accounting setup

[linux-2.6] / mm / memcontrol.c

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 80e48cd9d0c7828a8df707996221098099f0a7d5..4d4805eb37c77b06a98a9d06690982420734e077 100644 (file)
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -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
@@ -17,6 +20,7 @@
 #include <linux/res_counter.h>
 #include <linux/memcontrol.h>
 #include <linux/cgroup.h>
+#include <linux/mm.h>
 
 struct cgroup_subsys mem_cgroup_subsys;
 
@@ -35,6 +39,13 @@ struct mem_cgroup {
         * the counter to account for memory usage
         */
        struct res_counter res;
+       /*
+        * Per cgroup active and inactive list, similar to the
+        * per zone LRU lists.
+        * TODO: Consider making these lists per zone
+        */
+       struct list_head active_list;
+       struct list_head inactive_list;
 };
 
 /*
@@ -56,6 +67,37 @@ struct mem_cgroup *mem_cgroup_from_cont(struct cgroup *cont)
                                css);
 }
 
+static inline
+struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p)
+{
+       return container_of(task_subsys_state(p, mem_cgroup_subsys_id),
+                               struct mem_cgroup, css);
+}
+
+void mm_init_cgroup(struct mm_struct *mm, struct task_struct *p)
+{
+       struct mem_cgroup *mem;
+
+       mem = mem_cgroup_from_task(p);
+       css_get(&mem->css);
+       mm->mem_cgroup = mem;
+}
+
+void mm_free_cgroup(struct mm_struct *mm)
+{
+       css_put(&mm->mem_cgroup->css);
+}
+
+void page_assign_page_cgroup(struct page *page, struct page_cgroup *pc)
+{
+       page->page_cgroup = (unsigned long)pc;
+}
+
+struct page_cgroup *page_get_page_cgroup(struct page *page)
+{
+       return page->page_cgroup;
+}
+
 static ssize_t mem_cgroup_read(struct cgroup *cont, struct cftype *cft,
                        struct file *file, char __user *userbuf, size_t nbytes,
                        loff_t *ppos)
@@ -91,14 +133,21 @@ static struct cftype mem_cgroup_files[] = {
        },
 };
 
+static struct mem_cgroup init_mem_cgroup;
+
 static struct cgroup_subsys_state *
 mem_cgroup_create(struct cgroup_subsys *ss, struct cgroup *cont)
 {
        struct mem_cgroup *mem;
 
-       mem = kzalloc(sizeof(struct mem_cgroup), GFP_KERNEL);
-       if (!mem)
-               return -ENOMEM;
+       if (unlikely((cont->parent) == NULL)) {
+               mem = &init_mem_cgroup;
+               init_mm.mem_cgroup = mem;
+       } else
+               mem = kzalloc(sizeof(struct mem_cgroup), GFP_KERNEL);
+
+       if (mem == NULL)
+               return NULL;
 
        res_counter_init(&mem->res);
        return &mem->css;
@@ -123,5 +172,5 @@ struct cgroup_subsys mem_cgroup_subsys = {
        .create = mem_cgroup_create,
        .destroy = mem_cgroup_destroy,
        .populate = mem_cgroup_populate,
-       .early_init = 0,
+       .early_init = 1,
 };