[-mm PATCH 3/10] Memory controller accounting setup (v7)

[Balbir Singh <balbir@linux.vnet.ibm.com>]

From: Pavel Emelianov <xemul@openvz.org>

Changelog for v5

1. Remove inclusion of memcontrol.h from mm_types.h

Changelog

As per Paul's review comments

1. Drop css_get() for the root memory container
2. Use mem_container_from_task() as an optimization instead of using
   mem_container_from_cont() along with task_container.

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

Signed-off-by: Pavel Emelianov <xemul@openvz.org>

Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com>
---

 include/linux/memcontrol.h |   36 ++++++++++++++++++++++++++++
 include/linux/mm_types.h   |    6 ++++
 include/linux/sched.h      |    1 
 kernel/fork.c              |   11 ++++++--
 mm/memcontrol.c            |   57 +++++++++++++++++++++++++++++++++++++++++----
 5 files changed, 104 insertions(+), 7 deletions(-)

diff -puN include/linux/memcontrol.h~mem-control-accounting-setup include/linux/memcontrol.h
--- linux-2.6.23-rc2-mm2/include/linux/memcontrol.h~mem-control-accounting-setup	2007-08-24 20:46:07.000000000 +0530
+++ linux-2.6.23-rc2-mm2-balbir/include/linux/memcontrol.h	2007-08-24 20:46:07.000000000 +0530
@@ -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_container;
+struct page_container;
+
+#ifdef CONFIG_CONTAINER_MEM_CONT
+
+extern void mm_init_container(struct mm_struct *mm, struct task_struct *p);
+extern void mm_free_container(struct mm_struct *mm);
+extern void page_assign_page_container(struct page *page,
+					struct page_container *pc);
+extern struct page_container *page_get_page_container(struct page *page);
+
+#else /* CONFIG_CONTAINER_MEM_CONT */
+static inline void mm_init_container(struct mm_struct *mm,
+					struct task_struct *p)
+{
+}
+
+static inline void mm_free_container(struct mm_struct *mm)
+{
+}
+
+static inline void page_assign_page_container(struct page *page,
+						struct page_container *pc)
+{
+}
+
+static inline struct page_container *page_get_page_container(struct page *page)
+{
+	return NULL;
+}
+
+#endif /* CONFIG_CONTAINER_MEM_CONT */
+
 #endif /* _LINUX_MEMCONTROL_H */
 
diff -puN include/linux/mm_types.h~mem-control-accounting-setup include/linux/mm_types.h
--- linux-2.6.23-rc2-mm2/include/linux/mm_types.h~mem-control-accounting-setup	2007-08-24 20:46:07.000000000 +0530
+++ linux-2.6.23-rc2-mm2-balbir/include/linux/mm_types.h	2007-08-24 20:46:07.000000000 +0530
@@ -96,6 +96,9 @@ struct page {
 	unsigned int gfp_mask;
 	unsigned long trace[8];
 #endif
+#ifdef CONFIG_CONTAINER_MEM_CONT
+	unsigned long page_container;
+#endif
 };
 
 /*
@@ -227,6 +230,9 @@ struct mm_struct {
 	/* aio bits */
 	rwlock_t		ioctx_list_lock;
 	struct kioctx		*ioctx_list;
+#ifdef CONFIG_CONTAINER_MEM_CONT
+	struct mem_container *mem_container;
+#endif
 };
 
 #endif /* _LINUX_MM_TYPES_H */
diff -puN include/linux/sched.h~mem-control-accounting-setup include/linux/sched.h
--- linux-2.6.23-rc2-mm2/include/linux/sched.h~mem-control-accounting-setup	2007-08-24 20:46:07.000000000 +0530
+++ linux-2.6.23-rc2-mm2-balbir/include/linux/sched.h	2007-08-24 20:46:07.000000000 +0530
@@ -88,6 +88,7 @@ struct sched_param {
 
 #include <asm/processor.h>
 
+struct mem_container;
 struct exec_domain;
 struct futex_pi_state;
 struct bio;
diff -puN kernel/fork.c~mem-control-accounting-setup kernel/fork.c
--- linux-2.6.23-rc2-mm2/kernel/fork.c~mem-control-accounting-setup	2007-08-24 20:46:07.000000000 +0530
+++ linux-2.6.23-rc2-mm2-balbir/kernel/fork.c	2007-08-24 20:46:07.000000000 +0530
@@ -51,6 +51,7 @@
 #include <linux/random.h>
 #include <linux/tty.h>
 #include <linux/proc_fs.h>
+#include <linux/memcontrol.h>
 
 #include <asm/pgtable.h>
 #include <asm/pgalloc.h>
@@ -329,7 +330,7 @@ __cacheline_aligned_in_smp DEFINE_SPINLO
 
 #include <linux/init_task.h>
 
-static struct mm_struct * mm_init(struct mm_struct * mm)
+static struct mm_struct * mm_init(struct mm_struct * mm, struct task_struct *p)
 {
 	atomic_set(&mm->mm_users, 1);
 	atomic_set(&mm->mm_count, 1);
@@ -346,11 +347,14 @@ static struct mm_struct * mm_init(struct
 	mm->ioctx_list = NULL;
 	mm->free_area_cache = TASK_UNMAPPED_BASE;
 	mm->cached_hole_size = ~0UL;
+	mm_init_container(mm, p);
 
 	if (likely(!mm_alloc_pgd(mm))) {
 		mm->def_flags = 0;
 		return mm;
 	}
+
+	mm_free_container(mm);
 	free_mm(mm);
 	return NULL;
 }
@@ -365,7 +369,7 @@ struct mm_struct * mm_alloc(void)
 	mm = allocate_mm();
 	if (mm) {
 		memset(mm, 0, sizeof(*mm));
-		mm = mm_init(mm);
+		mm = mm_init(mm, current);
 	}
 	return mm;
 }
@@ -379,6 +383,7 @@ void fastcall __mmdrop(struct mm_struct 
 {
 	BUG_ON(mm == &init_mm);
 	mm_free_pgd(mm);
+	mm_free_container(mm);
 	destroy_context(mm);
 	free_mm(mm);
 }
@@ -499,7 +504,7 @@ static struct mm_struct *dup_mm(struct t
 	mm->token_priority = 0;
 	mm->last_interval = 0;
 
-	if (!mm_init(mm))
+	if (!mm_init(mm, tsk))
 		goto fail_nomem;
 
 	if (init_new_context(tsk, mm))
diff -puN mm/memcontrol.c~mem-control-accounting-setup mm/memcontrol.c
--- linux-2.6.23-rc2-mm2/mm/memcontrol.c~mem-control-accounting-setup	2007-08-24 20:46:07.000000000 +0530
+++ linux-2.6.23-rc2-mm2-balbir/mm/memcontrol.c	2007-08-24 20:46:07.000000000 +0530
@@ -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/container.h>
+#include <linux/mm.h>
 
 struct container_subsys mem_container_subsys;
 
@@ -35,6 +39,13 @@ struct mem_container {
 	 * the counter to account for memory usage
 	 */
 	struct res_counter res;
+	/*
+	 * Per container 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_container *mem_container_from
 				css);
 }
 
+static inline
+struct mem_container *mem_container_from_task(struct task_struct *p)
+{
+	return container_of(task_subsys_state(p, mem_container_subsys_id),
+				struct mem_container, css);
+}
+
+void mm_init_container(struct mm_struct *mm, struct task_struct *p)
+{
+	struct mem_container *mem;
+
+	mem = mem_container_from_task(p);
+	css_get(&mem->css);
+	mm->mem_container = mem;
+}
+
+void mm_free_container(struct mm_struct *mm)
+{
+	css_put(&mm->mem_container->css);
+}
+
+void page_assign_page_container(struct page *page, struct page_container *pc)
+{
+	page->page_container = (unsigned long)pc;
+}
+
+struct page_container *page_get_page_container(struct page *page)
+{
+	return page->page_container;
+}
+
 static ssize_t mem_container_read(struct container *cont, struct cftype *cft,
 			struct file *file, char __user *userbuf, size_t nbytes,
 			loff_t *ppos)
@@ -91,14 +133,21 @@ static struct cftype mem_container_files
 	},
 };
 
+static struct mem_container init_mem_container;
+
 static struct container_subsys_state *
 mem_container_create(struct container_subsys *ss, struct container *cont)
 {
 	struct mem_container *mem;
 
-	mem = kzalloc(sizeof(struct mem_container), GFP_KERNEL);
-	if (!mem)
-		return -ENOMEM;
+	if (unlikely((cont->parent) == NULL)) {
+		mem = &init_mem_container;
+		init_mm.mem_container = mem;
+	} else
+		mem = kzalloc(sizeof(struct mem_container), GFP_KERNEL);
+
+	if (mem == NULL)
+		return NULL;
 
 	res_counter_init(&mem->res);
 	return &mem->css;
@@ -123,5 +172,5 @@ struct container_subsys mem_container_su
 	.create = mem_container_create,
 	.destroy = mem_container_destroy,
 	.populate = mem_container_populate,
-	.early_init = 0,
+	.early_init = 1,
 };
_

-- 
	Warm Regards,
	Balbir Singh
	Linux Technology Center
	IBM, ISTL
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