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Subject[RFC][-mm PATCH 3/8] Memory controller accounting setup (v3)

From: Pavel Emelianov <xemul@openvz.org>

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

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

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

include/linux/memcontrol.h | 35 +++++++++++++++++++++++++++++++
include/linux/mm_types.h | 4 +++
include/linux/sched.h | 4 +++
kernel/fork.c | 10 ++++++---
mm/memcontrol.c | 50 ++++++++++++++++++++++++++++++++++++++++++---
5 files changed, 97 insertions(+), 6 deletions(-)

diff -puN include/linux/memcontrol.h~mem-control-accounting-setup include/linux/memcontrol.h
--- linux-2.6.22-rc6/include/linux/memcontrol.h~mem-control-accounting-setup 2007-07-20 13:13:25.000000000 +0530
+++ linux-2.6.22-rc6-balbir/include/linux/memcontrol.h 2007-07-20 13:13:25.000000000 +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 +20,37 @@
#ifndef _LINUX_MEMCONTROL_H
#define _LINUX_MEMCONTROL_H

+struct mem_container;
+struct meta_page;
+
+#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_meta_page(struct page *page, struct meta_page *mp);
+extern struct meta_page *page_get_meta_page(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_meta_page(struct page *page,
+ struct meta_page *mp)
+{
+}
+
+static inline struct meta_page *page_get_meta_page(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-2.6.22-rc6/include/linux/mm_types.h~mem-control-accounting-setup 2007-07-20 13:13:25.000000000 +0530
+++ linux-2.6.22-rc6-balbir/include/linux/mm_types.h 2007-07-20 13:13:25.000000000 +0530
@@ -5,6 +5,7 @@
#include <linux/threads.h>
#include <linux/list.h>
#include <linux/spinlock.h>
+#include <linux/memcontrol.h>

struct address_space;

@@ -83,6 +84,9 @@ struct page {
unsigned int gfp_mask;
unsigned long trace[8];
#endif
+#ifdef CONFIG_CONTAINER_MEM_CONT
+ struct meta_page *meta_page;
+#endif
};

#endif /* _LINUX_MM_TYPES_H */
diff -puN include/linux/sched.h~mem-control-accounting-setup include/linux/sched.h
--- linux-2.6.22-rc6/include/linux/sched.h~mem-control-accounting-setup 2007-07-20 13:13:25.000000000 +0530
+++ linux-2.6.22-rc6-balbir/include/linux/sched.h 2007-07-20 13:13:25.000000000 +0530
@@ -90,6 +90,7 @@ struct sched_param {

#include <asm/processor.h>

+struct mem_container;
struct exec_domain;
struct futex_pi_state;
struct bio;
@@ -416,6 +417,9 @@ 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
};

struct sighand_struct {
diff -puN kernel/fork.c~mem-control-accounting-setup kernel/fork.c
--- linux-2.6.22-rc6/kernel/fork.c~mem-control-accounting-setup 2007-07-20 13:13:25.000000000 +0530
+++ linux-2.6.22-rc6-balbir/kernel/fork.c 2007-07-20 13:13:25.000000000 +0530
@@ -330,7 +330,7 @@ static inline void mm_free_pgd(struct mm

#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);
@@ -347,11 +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;
}
@@ -366,7 +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;
}
@@ -380,6 +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);
}
@@ -500,7 +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-2.6.22-rc6/mm/memcontrol.c~mem-control-accounting-setup 2007-07-20 13:13:25.000000000 +0530
+++ linux-2.6.22-rc6-balbir/mm/memcontrol.c 2007-07-20 13:13:25.000000000 +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 +67,31 @@ struct mem_container *mem_container_from
css);
}

+void mm_init_container(struct mm_struct *mm, struct task_struct *p)
+{
+ struct mem_container *mem;
+
+ mem = mem_container_from_cont(task_container(p,
+ mem_container_subsys_id));
+ 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_meta_page(struct page *page, struct meta_page *mp)
+{
+ page->meta_page = mp;
+}
+
+struct meta_page *page_get_meta_page(struct page *page)
+{
+ return page->meta_page;
+}
+
static ssize_t mem_container_read(struct container *cont, struct cftype *cft,
struct file *file, char __user *userbuf, size_t nbytes,
loff_t *ppos)
@@ -91,13 +127,21 @@ static struct cftype mem_container_failc
.read = mem_container_read,
};

+static struct mem_container init_mem_container;
+
static int mem_container_create(struct container_subsys *ss,
struct container *cont)
{
struct mem_container *mem;

- mem = kzalloc(sizeof(struct mem_container), GFP_KERNEL);
- if (!mem)
+ if (unlikely((cont->parent) == NULL)) {
+ mem = &init_mem_container;
+ css_get(&mem->css);
+ init_mm.mem_container = mem;
+ } else
+ mem = kzalloc(sizeof(struct mem_container), GFP_KERNEL);
+
+ if (mem == NULL)
return -ENOMEM;

res_counter_init(&mem->res);
@@ -139,5 +183,5 @@ 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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