Message-Id: <20080804.180022.183027902.ryov@valinux.co.jp>
Date:	Mon, 04 Aug 2008 18:00:22 +0900 (JST)
From:	Ryo Tsuruta <ryov@...inux.co.jp>
To:	linux-kernel@...r.kernel.org, dm-devel@...hat.com,
	containers@...ts.linux-foundation.org,
	virtualization@...ts.linux-foundation.org,
	xen-devel@...ts.xensource.com
Cc:	agk@...rceware.org
Subject: [PATCH 6/7] bio-cgroup: Implement the bio-cgroup

This patch implements the bio cgroup on the memory cgroup.

Based on 2.6.27-rc1-mm1
Signed-off-by: Ryo Tsuruta <ryov@...inux.co.jp>
Signed-off-by: Hirokazu Takahashi <taka@...inux.co.jp>

diff -Ndupr linux-2.6.27-rc1-mm1.cg1/block/blk-ioc.c linux-2.6.27-rc1-mm1.cg2/block/blk-ioc.c
--- linux-2.6.27-rc1-mm1.cg1/block/blk-ioc.c	2008-07-29 11:40:31.000000000 +0900
+++ linux-2.6.27-rc1-mm1.cg2/block/blk-ioc.c	2008-08-01 19:18:38.000000000 +0900
@@ -84,24 +84,28 @@ void exit_io_context(void)
 	}
 }
 
+void init_io_context(struct io_context *ioc)
+{
+	atomic_set(&ioc->refcount, 1);
+	atomic_set(&ioc->nr_tasks, 1);
+	spin_lock_init(&ioc->lock);
+	ioc->ioprio_changed = 0;
+	ioc->ioprio = 0;
+	ioc->last_waited = jiffies; /* doesn't matter... */
+	ioc->nr_batch_requests = 0; /* because this is 0 */
+	ioc->aic = NULL;
+	INIT_RADIX_TREE(&ioc->radix_root, GFP_ATOMIC | __GFP_HIGH);
+	INIT_HLIST_HEAD(&ioc->cic_list);
+	ioc->ioc_data = NULL;
+}
+
 struct io_context *alloc_io_context(gfp_t gfp_flags, int node)
 {
 	struct io_context *ret;
 
 	ret = kmem_cache_alloc_node(iocontext_cachep, gfp_flags, node);
-	if (ret) {
-		atomic_set(&ret->refcount, 1);
-		atomic_set(&ret->nr_tasks, 1);
-		spin_lock_init(&ret->lock);
-		ret->ioprio_changed = 0;
-		ret->ioprio = 0;
-		ret->last_waited = jiffies; /* doesn't matter... */
-		ret->nr_batch_requests = 0; /* because this is 0 */
-		ret->aic = NULL;
-		INIT_RADIX_TREE(&ret->radix_root, GFP_ATOMIC | __GFP_HIGH);
-		INIT_HLIST_HEAD(&ret->cic_list);
-		ret->ioc_data = NULL;
-	}
+	if (ret)
+		init_io_context(ret);
 
 	return ret;
 }
diff -Ndupr linux-2.6.27-rc1-mm1.cg1/include/linux/biocontrol.h linux-2.6.27-rc1-mm1.cg2/include/linux/biocontrol.h
--- linux-2.6.27-rc1-mm1.cg1/include/linux/biocontrol.h	1970-01-01 09:00:00.000000000 +0900
+++ linux-2.6.27-rc1-mm1.cg2/include/linux/biocontrol.h	2008-08-01 19:21:56.000000000 +0900
@@ -0,0 +1,159 @@
+#include <linux/cgroup.h>
+#include <linux/mm.h>
+#include <linux/memcontrol.h>
+
+#ifndef _LINUX_BIOCONTROL_H
+#define _LINUX_BIOCONTROL_H
+
+#ifdef	CONFIG_CGROUP_BIO
+
+struct io_context;
+struct block_device;
+
+struct bio_cgroup {
+	struct cgroup_subsys_state css;
+	int id;
+	struct io_context *io_context;	/* default io_context */
+/*	struct radix_tree_root io_context_root; per device io_context */
+	spinlock_t		page_list_lock;
+	struct list_head	page_list;
+};
+
+static inline int bio_cgroup_disabled(void)
+{
+	return bio_cgroup_subsys.disabled;
+}
+
+static inline struct bio_cgroup *bio_cgroup_from_task(struct task_struct *p)
+{
+	return container_of(task_subsys_state(p, bio_cgroup_subsys_id),
+				struct bio_cgroup, css);
+}
+
+static inline void __bio_cgroup_add_page(struct page_cgroup *pc)
+{
+	struct bio_cgroup *biog = pc->bio_cgroup;
+	list_add(&pc->blist, &biog->page_list);
+}
+
+static inline void bio_cgroup_add_page(struct page_cgroup *pc)
+{
+	struct bio_cgroup *biog = pc->bio_cgroup;
+	unsigned long flags;
+	spin_lock_irqsave(&biog->page_list_lock, flags);
+	__bio_cgroup_add_page(pc);
+	spin_unlock_irqrestore(&biog->page_list_lock, flags);
+}
+
+static inline void __bio_cgroup_remove_page(struct page_cgroup *pc)
+{
+	list_del_init(&pc->blist);
+}
+
+static inline void bio_cgroup_remove_page(struct page_cgroup *pc)
+{
+	struct bio_cgroup *biog = pc->bio_cgroup;
+	unsigned long flags;
+	spin_lock_irqsave(&biog->page_list_lock, flags);
+	__bio_cgroup_remove_page(pc);
+	spin_unlock_irqrestore(&biog->page_list_lock, flags);
+}
+
+static inline void get_bio_cgroup(struct bio_cgroup *biog)
+{
+	css_get(&biog->css);
+}
+
+static inline void put_bio_cgroup(struct bio_cgroup *biog)
+{
+	css_put(&biog->css);
+}
+
+static inline void set_bio_cgroup(struct page_cgroup *pc,
+					struct bio_cgroup *biog)
+{
+	pc->bio_cgroup = biog;
+}
+
+static inline void clear_bio_cgroup(struct page_cgroup *pc)
+{
+	struct bio_cgroup *biog = pc->bio_cgroup;
+	pc->bio_cgroup = NULL;
+	put_bio_cgroup(biog);
+}
+
+static inline struct bio_cgroup *get_bio_page_cgroup(struct page_cgroup *pc)
+{
+	struct bio_cgroup *biog = pc->bio_cgroup;
+	css_get(&biog->css);
+	return biog;
+}
+
+/* This sould be called in an RCU-protected section. */
+static inline struct bio_cgroup *mm_get_bio_cgroup(struct mm_struct *mm)
+{
+	struct bio_cgroup *biog;
+	biog = bio_cgroup_from_task(rcu_dereference(mm->owner));
+	get_bio_cgroup(biog);
+	return biog;
+}
+
+extern struct io_context *get_bio_cgroup_iocontext(struct bio *bio);
+
+#else	/* CONFIG_CGROUP_BIO */
+
+struct bio_cgroup;
+
+static inline int bio_cgroup_disabled(void)
+{
+	return 1;
+}
+
+static inline void bio_cgroup_add_page(struct page_cgroup *pc)
+{
+}
+
+static inline void bio_cgroup_remove_page(struct page_cgroup *pc)
+{
+}
+
+static inline void get_bio_cgroup(struct bio_cgroup *biog)
+{
+}
+
+static inline void put_bio_cgroup(struct bio_cgroup *biog)
+{
+}
+
+static inline void set_bio_cgroup(struct page_cgroup *pc,
+					struct bio_cgroup *biog)
+{
+}
+
+static inline void clear_bio_cgroup(struct page_cgroup *pc)
+{
+}
+
+static inline struct bio_cgroup *get_bio_page_cgroup(struct page_cgroup *pc)
+{
+	return NULL;
+}
+
+static inline struct bio_cgroup *mm_get_bio_cgroup(struct mm_struct *mm)
+{
+	return NULL;
+}
+
+static inline int get_bio_cgroup_id(struct page *page)
+{
+	return 0;
+}
+
+static inline struct io_context *get_bio_cgroup_iocontext(struct bio *bio)
+{
+	return NULL;
+}
+
+#endif	/* CONFIG_CGROUP_BIO */
+
+#endif /* _LINUX_BIOCONTROL_H */
diff -Ndupr linux-2.6.27-rc1-mm1.cg1/include/linux/cgroup_subsys.h linux-2.6.27-rc1-mm1.cg2/include/linux/cgroup_subsys.h
--- linux-2.6.27-rc1-mm1.cg1/include/linux/cgroup_subsys.h	2008-08-01 12:18:28.000000000 +0900
+++ linux-2.6.27-rc1-mm1.cg2/include/linux/cgroup_subsys.h	2008-08-01 19:18:38.000000000 +0900
@@ -43,6 +43,12 @@ SUBSYS(mem_cgroup)
 
 /* */
 
+#ifdef CONFIG_CGROUP_BIO
+SUBSYS(bio_cgroup)
+#endif
+
+/* */
+
 #ifdef CONFIG_CGROUP_DEVICE
 SUBSYS(devices)
 #endif
diff -Ndupr linux-2.6.27-rc1-mm1.cg1/include/linux/iocontext.h linux-2.6.27-rc1-mm1.cg2/include/linux/iocontext.h
--- linux-2.6.27-rc1-mm1.cg1/include/linux/iocontext.h	2008-07-29 11:40:31.000000000 +0900
+++ linux-2.6.27-rc1-mm1.cg2/include/linux/iocontext.h	2008-08-01 19:18:38.000000000 +0900
@@ -83,6 +83,8 @@ struct io_context {
 	struct radix_tree_root radix_root;
 	struct hlist_head cic_list;
 	void *ioc_data;
+
+	int id;		/* cgroup ID */
 };
 
 static inline struct io_context *ioc_task_link(struct io_context *ioc)
@@ -104,6 +106,7 @@ int put_io_context(struct io_context *io
 void exit_io_context(void);
 struct io_context *get_io_context(gfp_t gfp_flags, int node);
 struct io_context *alloc_io_context(gfp_t gfp_flags, int node);
+void init_io_context(struct io_context *ioc);
 void copy_io_context(struct io_context **pdst, struct io_context **psrc);
 #else
 static inline void exit_io_context(void)
diff -Ndupr linux-2.6.27-rc1-mm1.cg1/include/linux/memcontrol.h linux-2.6.27-rc1-mm1.cg2/include/linux/memcontrol.h
--- linux-2.6.27-rc1-mm1.cg1/include/linux/memcontrol.h	2008-08-01 19:03:21.000000000 +0900
+++ linux-2.6.27-rc1-mm1.cg2/include/linux/memcontrol.h	2008-08-01 19:22:10.000000000 +0900
@@ -54,6 +54,10 @@ struct page_cgroup {
 	struct list_head lru;		/* per cgroup LRU list */
 	struct mem_cgroup *mem_cgroup;
 #endif /* CONFIG_CGROUP_MEM_RES_CTLR */
+#ifdef CONFIG_CGROUP_BIO
+	struct list_head blist;		/* for bio_cgroup page list */
+	struct bio_cgroup *bio_cgroup;
+#endif
 	struct page *page;
 	int flags;
 };
diff -Ndupr linux-2.6.27-rc1-mm1.cg1/init/Kconfig linux-2.6.27-rc1-mm1.cg2/init/Kconfig
--- linux-2.6.27-rc1-mm1.cg1/init/Kconfig	2008-08-01 19:03:21.000000000 +0900
+++ linux-2.6.27-rc1-mm1.cg2/init/Kconfig	2008-08-01 19:18:38.000000000 +0900
@@ -418,9 +418,20 @@ config CGROUP_MEMRLIMIT_CTLR
 	  memory RSS and Page Cache control. Virtual address space control
 	  is provided by this controller.
 
+config CGROUP_BIO
+	bool "Block I/O cgroup subsystem"
+	depends on CGROUPS
+	select MM_OWNER
+	help
+	  Provides a Resource Controller which enables to track the onwner
+	  of every Block I/O.
+	  The information this subsystem provides can be used from any
+	  kind of module such as dm-ioband device mapper modules or
+	  the cfq-scheduler.
+
 config CGROUP_PAGE
 	def_bool y
-	depends on CGROUP_MEM_RES_CTLR
+	depends on CGROUP_MEM_RES_CTLR || CGROUP_BIO
 
 config SYSFS_DEPRECATED
 	bool
diff -Ndupr linux-2.6.27-rc1-mm1.cg1/mm/Makefile linux-2.6.27-rc1-mm1.cg2/mm/Makefile
--- linux-2.6.27-rc1-mm1.cg1/mm/Makefile	2008-08-01 19:03:21.000000000 +0900
+++ linux-2.6.27-rc1-mm1.cg2/mm/Makefile	2008-08-01 19:18:38.000000000 +0900
@@ -35,4 +35,5 @@ obj-$(CONFIG_MIGRATION) += migrate.o
 obj-$(CONFIG_SMP) += allocpercpu.o
 obj-$(CONFIG_QUICKLIST) += quicklist.o
 obj-$(CONFIG_CGROUP_PAGE) += memcontrol.o
+obj-$(CONFIG_CGROUP_BIO) += biocontrol.o
 obj-$(CONFIG_CGROUP_MEMRLIMIT_CTLR) += memrlimitcgroup.o
diff -Ndupr linux-2.6.27-rc1-mm1.cg1/mm/biocontrol.c linux-2.6.27-rc1-mm1.cg2/mm/biocontrol.c
--- linux-2.6.27-rc1-mm1.cg1/mm/biocontrol.c	1970-01-01 09:00:00.000000000 +0900
+++ linux-2.6.27-rc1-mm1.cg2/mm/biocontrol.c	2008-08-01 19:35:51.000000000 +0900
@@ -0,0 +1,233 @@
+/* biocontrol.c - Block I/O Controller
+ *
+ * Copyright IBM Corporation, 2007
+ * Author Balbir Singh <balbir@...ux.vnet.ibm.com>
+ *
+ * Copyright 2007 OpenVZ SWsoft Inc
+ * Author: Pavel Emelianov <xemul@...nvz.org>
+ *
+ * Copyright VA Linux Systems Japan, 2008
+ * Author Hirokazu Takahashi <taka@...inux.co.jp>
+ *
+ * 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
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/cgroup.h>
+#include <linux/mm.h>
+#include <linux/blkdev.h>
+#include <linux/smp.h>
+#include <linux/bit_spinlock.h>
+#include <linux/idr.h>
+#include <linux/err.h>
+#include <linux/biocontrol.h>
+
+/* return corresponding bio_cgroup object of a cgroup */
+static inline struct bio_cgroup *cgroup_bio(struct cgroup *cgrp)
+{
+	return container_of(cgroup_subsys_state(cgrp, bio_cgroup_subsys_id),
+			    struct bio_cgroup, css);
+}
+
+static struct idr bio_cgroup_id;
+static DEFINE_SPINLOCK(bio_cgroup_idr_lock);
+
+static struct cgroup_subsys_state *
+bio_cgroup_create(struct cgroup_subsys *ss, struct cgroup *cgrp)
+{
+	struct bio_cgroup *biog;
+	struct io_context *ioc;
+	int error;
+
+	if (!cgrp->parent) {
+		static struct bio_cgroup default_bio_cgroup;
+		static struct io_context default_bio_io_context;
+
+		biog = &default_bio_cgroup;
+		ioc = &default_bio_io_context;
+		init_io_context(ioc);
+
+		idr_init(&bio_cgroup_id);
+		biog->id = 0;
+
+		page_cgroup_init();
+	} else {
+		biog = kzalloc(sizeof(*biog), GFP_KERNEL);
+		ioc = alloc_io_context(GFP_KERNEL, -1);
+		if (!ioc || !biog) {
+			error = -ENOMEM;
+			goto out;
+		}
+retry:
+		if (unlikely(!idr_pre_get(&bio_cgroup_id, GFP_KERNEL))) {
+			error = -EAGAIN;
+			goto out;
+		}
+		spin_lock_irq(&bio_cgroup_idr_lock);
+		error = idr_get_new_above(&bio_cgroup_id,
+						(void *)biog, 1, &biog->id);
+		spin_unlock_irq(&bio_cgroup_idr_lock);
+		if (error == -EAGAIN)
+			goto retry;
+		else if (error)
+			goto out;
+	}
+
+	ioc->id = biog->id;
+	biog->io_context = ioc;
+
+	INIT_LIST_HEAD(&biog->page_list);
+	spin_lock_init(&biog->page_list_lock);
+
+	/* Bind the cgroup to bio_cgroup object we just created */
+	biog->css.cgroup = cgrp;
+
+	return &biog->css;
+out:
+	if (ioc)
+		put_io_context(ioc);
+	kfree(biog);
+	return ERR_PTR(error);
+}
+
+#define FORCE_UNCHARGE_BATCH	(128)
+static void bio_cgroup_force_empty(struct bio_cgroup *biog)
+{
+	struct page_cgroup *pc;
+	struct page *page;
+	int count = FORCE_UNCHARGE_BATCH;
+	struct list_head *list = &biog->page_list;
+	unsigned long flags;
+
+	spin_lock_irqsave(&biog->page_list_lock, flags);
+	while (!list_empty(list)) {
+		pc = list_entry(list->prev, struct page_cgroup, blist);
+		page = pc->page;
+		get_page(page);
+		spin_unlock_irqrestore(&biog->page_list_lock, flags);
+		mem_cgroup_uncharge_page(page);
+		put_page(page);
+		if (--count <= 0) {
+			count = FORCE_UNCHARGE_BATCH;
+			cond_resched();
+		}
+		spin_lock_irqsave(&biog->page_list_lock, flags);
+	}
+	spin_unlock_irqrestore(&biog->page_list_lock, flags);
+	return;
+}
+
+static void bio_cgroup_pre_destroy(struct cgroup_subsys *ss,
+							struct cgroup *cgrp)
+{
+	struct bio_cgroup *biog = cgroup_bio(cgrp);
+	bio_cgroup_force_empty(biog);
+}
+
+static void bio_cgroup_destroy(struct cgroup_subsys *ss, struct cgroup *cgrp)
+{
+	struct bio_cgroup *biog = cgroup_bio(cgrp);
+
+	put_io_context(biog->io_context);
+
+	spin_lock_irq(&bio_cgroup_idr_lock);
+	idr_remove(&bio_cgroup_id, biog->id);
+	spin_unlock_irq(&bio_cgroup_idr_lock);
+
+	kfree(biog);
+}
+
+struct bio_cgroup *find_bio_cgroup(int id)
+{
+	struct bio_cgroup *biog;
+	spin_lock_irq(&bio_cgroup_idr_lock);
+	biog = (struct bio_cgroup *)
+	idr_find(&bio_cgroup_id, id);
+	spin_unlock_irq(&bio_cgroup_idr_lock);
+	get_bio_cgroup(biog);
+	return biog;
+}
+
+struct io_context *get_bio_cgroup_iocontext(struct bio *bio)
+{
+	struct io_context *ioc;
+	struct page_cgroup *pc;
+	struct bio_cgroup *biog;
+	struct page *page = bio_iovec_idx(bio, 0)->bv_page;
+
+	lock_page_cgroup(page);
+	pc = page_get_page_cgroup(page);
+	if (pc)
+		biog = pc->bio_cgroup;
+	else
+		biog = bio_cgroup_from_task(rcu_dereference(init_mm.owner));
+	ioc = biog->io_context;	/* default io_context for this cgroup */
+	atomic_inc(&ioc->refcount);
+	unlock_page_cgroup(page);
+	return ioc;
+}
+EXPORT_SYMBOL(get_bio_cgroup_iocontext);
+
+static u64 bio_id_read(struct cgroup *cgrp, struct cftype *cft)
+{
+	struct bio_cgroup *biog = cgroup_bio(cgrp);
+
+	return (u64) biog->id;
+}
+
+
+static struct cftype bio_files[] = {
+	{
+		.name = "id",
+		.read_u64 = bio_id_read,
+	},
+};
+
+static int bio_cgroup_populate(struct cgroup_subsys *ss, struct cgroup *cont)
+{
+	if (bio_cgroup_disabled())
+		return 0;
+	return cgroup_add_files(cont, ss, bio_files, ARRAY_SIZE(bio_files));
+}
+
+static void bio_cgroup_move_task(struct cgroup_subsys *ss,
+				struct cgroup *cont,
+				struct cgroup *old_cont,
+				struct task_struct *p)
+{
+	struct mm_struct *mm;
+	struct bio_cgroup *biog, *old_biog;
+
+	if (bio_cgroup_disabled())
+		return;
+
+	mm = get_task_mm(p);
+	if (mm == NULL)
+		return;
+
+	biog = cgroup_bio(cont);
+	old_biog = cgroup_bio(old_cont);
+
+	mmput(mm);
+	return;
+}
+
+
+struct cgroup_subsys bio_cgroup_subsys = {
+	.name           = "bio",
+	.subsys_id      = bio_cgroup_subsys_id,
+	.create         = bio_cgroup_create,
+	.destroy        = bio_cgroup_destroy,
+	.pre_destroy	= bio_cgroup_pre_destroy,
+	.populate       = bio_cgroup_populate,
+	.attach		= bio_cgroup_move_task,
+	.early_init	= 0,
+};
diff -Ndupr linux-2.6.27-rc1-mm1.cg1/mm/memcontrol.c linux-2.6.27-rc1-mm1.cg2/mm/memcontrol.c
--- linux-2.6.27-rc1-mm1.cg1/mm/memcontrol.c	2008-08-01 19:49:38.000000000 +0900
+++ linux-2.6.27-rc1-mm1.cg2/mm/memcontrol.c	2008-08-01 19:49:53.000000000 +0900
@@ -20,6 +20,7 @@
 #include <linux/res_counter.h>
 #include <linux/memcontrol.h>
 #include <linux/cgroup.h>
+#include <linux/biocontrol.h>
 #include <linux/mm.h>
 #include <linux/smp.h>
 #include <linux/page-flags.h>
@@ -1019,11 +1020,12 @@ struct page_cgroup *page_get_page_cgroup
  * < 0 if the cgroup is over its limit
  */
 static int mem_cgroup_charge_common(struct page *page, struct mm_struct *mm,
-				gfp_t gfp_mask, enum charge_type ctype,
-				struct mem_cgroup *memcg)
+			gfp_t gfp_mask, enum charge_type ctype,
+			struct mem_cgroup *memcg, struct bio_cgroup *biocg)
 {
 	struct page_cgroup *pc;
 	struct mem_cgroup *mem;
+	struct bio_cgroup *biog;
 
 	pc = kmem_cache_alloc(page_cgroup_cache, gfp_mask);
 	if (unlikely(pc == NULL))
@@ -1035,18 +1037,15 @@ static int mem_cgroup_charge_common(stru
 	 * thread group leader migrates. It's possible that mm is not
 	 * set, if so charge the init_mm (happens for pagecache usage).
 	 */
-	if (likely(!memcg)) {
-		rcu_read_lock();
-		mem = mm_get_mem_cgroup(mm);
-		rcu_read_unlock();
-	} else {
-		mem = memcg;
-		get_mem_cgroup(mem);
-	}
+	rcu_read_lock();
+	mem = memcg ? memcg : mm_get_mem_cgroup(mm);
+	biog = biocg ? biocg : mm_get_bio_cgroup(mm);
+	rcu_read_unlock();
 
 	if (mem_cgroup_try_to_allocate(mem, gfp_mask) < 0)
 		goto out;
 	set_mem_cgroup(pc, mem);
+	set_bio_cgroup(pc, biog);
 	pc->page = page;
 	/*
 	 * If a page is accounted as a page cache, insert to inactive list.
@@ -1065,18 +1064,21 @@ static int mem_cgroup_charge_common(stru
 	if (unlikely(page_get_page_cgroup(page))) {
 		unlock_page_cgroup(page);
 		clear_mem_cgroup(pc);
+		clear_bio_cgroup(pc);
 		kmem_cache_free(page_cgroup_cache, pc);
 		goto done;
 	}
 	page_assign_page_cgroup(page, pc);
 
 	mem_cgroup_add_page(pc);
+	bio_cgroup_add_page(pc);
 
 	unlock_page_cgroup(page);
 done:
 	return 0;
 out:
 	put_mem_cgroup(mem);
+	put_bio_cgroup(biog);
 	kmem_cache_free(page_cgroup_cache, pc);
 err:
 	return -ENOMEM;
@@ -1099,7 +1101,7 @@ int mem_cgroup_charge(struct page *page,
 	if (unlikely(!mm))
 		mm = &init_mm;
 	return mem_cgroup_charge_common(page, mm, gfp_mask,
-				MEM_CGROUP_CHARGE_TYPE_MAPPED, NULL);
+				MEM_CGROUP_CHARGE_TYPE_MAPPED, NULL, NULL);
 }
 
 int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
@@ -1135,7 +1137,7 @@ int mem_cgroup_cache_charge(struct page 
 		mm = &init_mm;
 
 	return mem_cgroup_charge_common(page, mm, gfp_mask,
-				MEM_CGROUP_CHARGE_TYPE_CACHE, NULL);
+				MEM_CGROUP_CHARGE_TYPE_CACHE, NULL, NULL);
 }
 
 /*
@@ -1146,7 +1148,7 @@ __mem_cgroup_uncharge_common(struct page
 {
 	struct page_cgroup *pc;
 
-	if (mem_cgroup_disabled())
+	if (mem_cgroup_disabled() && bio_cgroup_disabled())
 		return;
 
 	/*
@@ -1166,11 +1168,13 @@ __mem_cgroup_uncharge_common(struct page
 		goto unlock;
 
 	mem_cgroup_remove_page(pc);
+	bio_cgroup_remove_page(pc);
 
 	page_assign_page_cgroup(page, NULL);
 	unlock_page_cgroup(page);
 
 	clear_mem_cgroup(pc);
+	clear_bio_cgroup(pc);
 
 	kmem_cache_free(page_cgroup_cache, pc);
 	return;
@@ -1196,24 +1200,29 @@ int mem_cgroup_prepare_migration(struct 
 {
 	struct page_cgroup *pc;
 	struct mem_cgroup *mem = NULL;
+	struct bio_cgroup *biog = NULL;
 	enum charge_type ctype = MEM_CGROUP_CHARGE_TYPE_MAPPED;
 	int ret = 0;
 
-	if (mem_cgroup_disabled())
+	if (mem_cgroup_disabled() && bio_cgroup_disabled())
 		return 0;
 
 	lock_page_cgroup(page);
 	pc = page_get_page_cgroup(page);
 	if (pc) {
 		mem = get_mem_page_cgroup(pc);
+		biog = get_bio_page_cgroup(pc);
 		if (pc->flags & PAGE_CGROUP_FLAG_CACHE)
 			ctype = MEM_CGROUP_CHARGE_TYPE_CACHE;
 	}
 	unlock_page_cgroup(page);
-	if (mem) {
+	if (pc) {
 		ret = mem_cgroup_charge_common(newpage, NULL, GFP_KERNEL,
-			ctype, mem);
-		put_mem_cgroup(mem);
+			ctype, mem, biog);
+		if (mem)
+			put_mem_cgroup(mem);
+		if (biog)
+			put_bio_cgroup(biog);
 	}
 	return ret;
 }
--
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