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>
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 80e48cd..4d4805e 100644
--- 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 @@
* 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 @@
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 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 @@
.create = mem_cgroup_create,
.destroy = mem_cgroup_destroy,
.populate = mem_cgroup_populate,
- .early_init = 0,
+ .early_init = 1,
};