Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 452 insertions, 0 deletions

diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
new file mode 100644
index 00000000..f94efd2f
--- /dev/null
+++ b/include/linux/memcontrol.h
@@ -0,0 +1,452 @@
+/* memcontrol.h - Memory Controller
+ *
+ * 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
+ * (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.
+ */
+
+#ifndef _LINUX_MEMCONTROL_H
+#define _LINUX_MEMCONTROL_H
+#include <linux/cgroup.h>
+#include <linux/vm_event_item.h>
+
+struct mem_cgroup;
+struct page_cgroup;
+struct page;
+struct mm_struct;
+
+/* Stats that can be updated by kernel. */
+enum mem_cgroup_page_stat_item {
+	MEMCG_NR_FILE_MAPPED, /* # of pages charged as file rss */
+};
+
+struct mem_cgroup_reclaim_cookie {
+	struct zone *zone;
+	int priority;
+	unsigned int generation;
+};
+
+#ifdef CONFIG_CGROUP_MEM_RES_CTLR
+/*
+ * All "charge" functions with gfp_mask should use GFP_KERNEL or
+ * (gfp_mask & GFP_RECLAIM_MASK). In current implementatin, memcg doesn't
+ * alloc memory but reclaims memory from all available zones. So, "where I want
+ * memory from" bits of gfp_mask has no meaning. So any bits of that field is
+ * available but adding a rule is better. charge functions' gfp_mask should
+ * be set to GFP_KERNEL or gfp_mask & GFP_RECLAIM_MASK for avoiding ambiguous
+ * codes.
+ * (Of course, if memcg does memory allocation in future, GFP_KERNEL is sane.)
+ */
+
+extern int mem_cgroup_newpage_charge(struct page *page, struct mm_struct *mm,
+				gfp_t gfp_mask);
+/* for swap handling */
+extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
+		struct page *page, gfp_t mask, struct mem_cgroup **memcgp);
+extern void mem_cgroup_commit_charge_swapin(struct page *page,
+					struct mem_cgroup *memcg);
+extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *memcg);
+
+extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
+					gfp_t gfp_mask);
+
+struct lruvec *mem_cgroup_zone_lruvec(struct zone *, struct mem_cgroup *);
+struct lruvec *mem_cgroup_lru_add_list(struct zone *, struct page *,
+				       enum lru_list);
+void mem_cgroup_lru_del_list(struct page *, enum lru_list);
+void mem_cgroup_lru_del(struct page *);
+struct lruvec *mem_cgroup_lru_move_lists(struct zone *, struct page *,
+					 enum lru_list, enum lru_list);
+
+/* For coalescing uncharge for reducing memcg' overhead*/
+extern void mem_cgroup_uncharge_start(void);
+extern void mem_cgroup_uncharge_end(void);
+
+extern void mem_cgroup_uncharge_page(struct page *page);
+extern void mem_cgroup_uncharge_cache_page(struct page *page);
+
+extern void mem_cgroup_out_of_memory(struct mem_cgroup *memcg, gfp_t gfp_mask,
+				     int order);
+int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *memcg);
+
+extern struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page);
+extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
+extern struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm);
+
+extern struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg);
+extern struct mem_cgroup *mem_cgroup_from_cont(struct cgroup *cont);
+
+static inline
+int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup)
+{
+	struct mem_cgroup *memcg;
+	rcu_read_lock();
+	memcg = mem_cgroup_from_task(rcu_dereference((mm)->owner));
+	rcu_read_unlock();
+	return cgroup == memcg;
+}
+
+extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *memcg);
+
+extern int
+mem_cgroup_prepare_migration(struct page *page,
+	struct page *newpage, struct mem_cgroup **memcgp, gfp_t gfp_mask);
+extern void mem_cgroup_end_migration(struct mem_cgroup *memcg,
+	struct page *oldpage, struct page *newpage, bool migration_ok);
+
+struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *,
+				   struct mem_cgroup *,
+				   struct mem_cgroup_reclaim_cookie *);
+void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *);
+
+/*
+ * For memory reclaim.
+ */
+int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg,
+				    struct zone *zone);
+int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg,
+				    struct zone *zone);
+int mem_cgroup_select_victim_node(struct mem_cgroup *memcg);
+unsigned long mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg,
+					int nid, int zid, unsigned int lrumask);
+struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg,
+						      struct zone *zone);
+struct zone_reclaim_stat*
+mem_cgroup_get_reclaim_stat_from_page(struct page *page);
+extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg,
+					struct task_struct *p);
+extern void mem_cgroup_replace_page_cache(struct page *oldpage,
+					struct page *newpage);
+
+#ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
+extern int do_swap_account;
+#endif
+
+static inline bool mem_cgroup_disabled(void)
+{
+	if (mem_cgroup_subsys.disabled)
+		return true;
+	return false;
+}
+
+void __mem_cgroup_begin_update_page_stat(struct page *page, bool *locked,
+					 unsigned long *flags);
+
+extern atomic_t memcg_moving;
+
+static inline void mem_cgroup_begin_update_page_stat(struct page *page,
+					bool *locked, unsigned long *flags)
+{
+	if (mem_cgroup_disabled())
+		return;
+	rcu_read_lock();
+	*locked = false;
+	if (atomic_read(&memcg_moving))
+		__mem_cgroup_begin_update_page_stat(page, locked, flags);
+}
+
+void __mem_cgroup_end_update_page_stat(struct page *page,
+				unsigned long *flags);
+static inline void mem_cgroup_end_update_page_stat(struct page *page,
+					bool *locked, unsigned long *flags)
+{
+	if (mem_cgroup_disabled())
+		return;
+	if (*locked)
+		__mem_cgroup_end_update_page_stat(page, flags);
+	rcu_read_unlock();
+}
+
+void mem_cgroup_update_page_stat(struct page *page,
+				 enum mem_cgroup_page_stat_item idx,
+				 int val);
+
+static inline void mem_cgroup_inc_page_stat(struct page *page,
+					    enum mem_cgroup_page_stat_item idx)
+{
+	mem_cgroup_update_page_stat(page, idx, 1);
+}
+
+static inline void mem_cgroup_dec_page_stat(struct page *page,
+					    enum mem_cgroup_page_stat_item idx)
+{
+	mem_cgroup_update_page_stat(page, idx, -1);
+}
+
+unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
+						gfp_t gfp_mask,
+						unsigned long *total_scanned);
+u64 mem_cgroup_get_limit(struct mem_cgroup *memcg);
+
+void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx);
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+void mem_cgroup_split_huge_fixup(struct page *head);
+#endif
+
+#ifdef CONFIG_DEBUG_VM
+bool mem_cgroup_bad_page_check(struct page *page);
+void mem_cgroup_print_bad_page(struct page *page);
+#endif
+#else /* CONFIG_CGROUP_MEM_RES_CTLR */
+struct mem_cgroup;
+
+static inline int mem_cgroup_newpage_charge(struct page *page,
+					struct mm_struct *mm, gfp_t gfp_mask)
+{
+	return 0;
+}
+
+static inline int mem_cgroup_cache_charge(struct page *page,
+					struct mm_struct *mm, gfp_t gfp_mask)
+{
+	return 0;
+}
+
+static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
+		struct page *page, gfp_t gfp_mask, struct mem_cgroup **memcgp)
+{
+	return 0;
+}
+
+static inline void mem_cgroup_commit_charge_swapin(struct page *page,
+					  struct mem_cgroup *memcg)
+{
+}
+
+static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *memcg)
+{
+}
+
+static inline void mem_cgroup_uncharge_start(void)
+{
+}
+
+static inline void mem_cgroup_uncharge_end(void)
+{
+}
+
+static inline void mem_cgroup_uncharge_page(struct page *page)
+{
+}
+
+static inline void mem_cgroup_uncharge_cache_page(struct page *page)
+{
+}
+
+static inline struct lruvec *mem_cgroup_zone_lruvec(struct zone *zone,
+						    struct mem_cgroup *memcg)
+{
+	return &zone->lruvec;
+}
+
+static inline struct lruvec *mem_cgroup_lru_add_list(struct zone *zone,
+						     struct page *page,
+						     enum lru_list lru)
+{
+	return &zone->lruvec;
+}
+
+static inline void mem_cgroup_lru_del_list(struct page *page, enum lru_list lru)
+{
+}
+
+static inline void mem_cgroup_lru_del(struct page *page)
+{
+}
+
+static inline struct lruvec *mem_cgroup_lru_move_lists(struct zone *zone,
+						       struct page *page,
+						       enum lru_list from,
+						       enum lru_list to)
+{
+	return &zone->lruvec;
+}
+
+static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page)
+{
+	return NULL;
+}
+
+static inline struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm)
+{
+	return NULL;
+}
+
+static inline int mm_match_cgroup(struct mm_struct *mm,
+		struct mem_cgroup *memcg)
+{
+	return 1;
+}
+
+static inline int task_in_mem_cgroup(struct task_struct *task,
+				     const struct mem_cgroup *memcg)
+{
+	return 1;
+}
+
+static inline struct cgroup_subsys_state
+		*mem_cgroup_css(struct mem_cgroup *memcg)
+{
+	return NULL;
+}
+
+static inline int
+mem_cgroup_prepare_migration(struct page *page, struct page *newpage,
+	struct mem_cgroup **memcgp, gfp_t gfp_mask)
+{
+	return 0;
+}
+
+static inline void mem_cgroup_end_migration(struct mem_cgroup *memcg,
+		struct page *oldpage, struct page *newpage, bool migration_ok)
+{
+}
+
+static inline struct mem_cgroup *
+mem_cgroup_iter(struct mem_cgroup *root,
+		struct mem_cgroup *prev,
+		struct mem_cgroup_reclaim_cookie *reclaim)
+{
+	return NULL;
+}
+
+static inline void mem_cgroup_iter_break(struct mem_cgroup *root,
+					 struct mem_cgroup *prev)
+{
+}
+
+static inline bool mem_cgroup_disabled(void)
+{
+	return true;
+}
+
+static inline int
+mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg, struct zone *zone)
+{
+	return 1;
+}
+
+static inline int
+mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg, struct zone *zone)
+{
+	return 1;
+}
+
+static inline unsigned long
+mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg, int nid, int zid,
+				unsigned int lru_mask)
+{
+	return 0;
+}
+
+
+static inline struct zone_reclaim_stat*
+mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, struct zone *zone)
+{
+	return NULL;
+}
+
+static inline struct zone_reclaim_stat*
+mem_cgroup_get_reclaim_stat_from_page(struct page *page)
+{
+	return NULL;
+}
+
+static inline void
+mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
+{
+}
+
+static inline void mem_cgroup_begin_update_page_stat(struct page *page,
+					bool *locked, unsigned long *flags)
+{
+}
+
+static inline void mem_cgroup_end_update_page_stat(struct page *page,
+					bool *locked, unsigned long *flags)
+{
+}
+
+static inline void mem_cgroup_inc_page_stat(struct page *page,
+					    enum mem_cgroup_page_stat_item idx)
+{
+}
+
+static inline void mem_cgroup_dec_page_stat(struct page *page,
+					    enum mem_cgroup_page_stat_item idx)
+{
+}
+
+static inline
+unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
+					    gfp_t gfp_mask,
+					    unsigned long *total_scanned)
+{
+	return 0;
+}
+
+static inline
+u64 mem_cgroup_get_limit(struct mem_cgroup *memcg)
+{
+	return 0;
+}
+
+static inline void mem_cgroup_split_huge_fixup(struct page *head)
+{
+}
+
+static inline
+void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx)
+{
+}
+static inline void mem_cgroup_replace_page_cache(struct page *oldpage,
+				struct page *newpage)
+{
+}
+#endif /* CONFIG_CGROUP_MEM_RES_CTLR */
+
+#if !defined(CONFIG_CGROUP_MEM_RES_CTLR) || !defined(CONFIG_DEBUG_VM)
+static inline bool
+mem_cgroup_bad_page_check(struct page *page)
+{
+	return false;
+}
+
+static inline void
+mem_cgroup_print_bad_page(struct page *page)
+{
+}
+#endif
+
+enum {
+	UNDER_LIMIT,
+	SOFT_LIMIT,
+	OVER_LIMIT,
+};
+
+struct sock;
+#ifdef CONFIG_CGROUP_MEM_RES_CTLR_KMEM
+void sock_update_memcg(struct sock *sk);
+void sock_release_memcg(struct sock *sk);
+#else
+static inline void sock_update_memcg(struct sock *sk)
+{
+}
+static inline void sock_release_memcg(struct sock *sk)
+{
+}
+#endif /* CONFIG_CGROUP_MEM_RES_CTLR_KMEM */
+#endif /* _LINUX_MEMCONTROL_H */
+