* 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
#ifndef _LINUX_MEMCONTROL_H
#define _LINUX_MEMCONTROL_H
+#include <linux/cgroup.h>
+struct mem_cgroup;
+struct page_cgroup;
+struct page;
+struct mm_struct;
+
+#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 **ptr);
+extern void mem_cgroup_commit_charge_swapin(struct page *page,
+ struct mem_cgroup *ptr);
+extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr);
+
+extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
+ gfp_t gfp_mask);
+extern void mem_cgroup_add_lru_list(struct page *page, enum lru_list lru);
+extern void mem_cgroup_del_lru_list(struct page *page, enum lru_list lru);
+extern void mem_cgroup_rotate_lru_list(struct page *page, enum lru_list lru);
+extern void mem_cgroup_del_lru(struct page *page);
+extern void mem_cgroup_move_lists(struct page *page,
+ enum lru_list from, enum lru_list to);
+extern void mem_cgroup_uncharge_page(struct page *page);
+extern void mem_cgroup_uncharge_cache_page(struct page *page);
+extern int mem_cgroup_shmem_charge_fallback(struct page *page,
+ struct mm_struct *mm, gfp_t gfp_mask);
+
+extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
+ struct list_head *dst,
+ unsigned long *scanned, int order,
+ int mode, struct zone *z,
+ struct mem_cgroup *mem_cont,
+ int active, int file);
+extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
+int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
+
+extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
+
+static inline
+int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup)
+{
+ struct mem_cgroup *mem;
+ rcu_read_lock();
+ mem = mem_cgroup_from_task(rcu_dereference((mm)->owner));
+ rcu_read_unlock();
+ return cgroup == mem;
+}
+
+extern int
+mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr);
+extern void mem_cgroup_end_migration(struct mem_cgroup *mem,
+ struct page *oldpage, struct page *newpage);
+
+/*
+ * For memory reclaim.
+ */
+extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem);
+extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
+ int priority);
+extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
+ int priority);
+int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg);
+int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg);
+unsigned long mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg,
+ struct zone *zone,
+ enum lru_list lru);
+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);
+
+#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;
+}
+
+extern bool mem_cgroup_oom_called(struct task_struct *task);
+void mem_cgroup_update_mapped_file_stat(struct page *page, int val);
+unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
+ gfp_t gfp_mask, int nid,
+ int zid);
+#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 **ptr)
+{
+ return 0;
+}
+
+static inline void mem_cgroup_commit_charge_swapin(struct page *page,
+ struct mem_cgroup *ptr)
+{
+}
+
+static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr)
+{
+}
+
+static inline void mem_cgroup_uncharge_page(struct page *page)
+{
+}
+
+static inline void mem_cgroup_uncharge_cache_page(struct page *page)
+{
+}
+
+static inline int mem_cgroup_shmem_charge_fallback(struct page *page,
+ struct mm_struct *mm, gfp_t gfp_mask)
+{
+ return 0;
+}
+
+static inline void mem_cgroup_add_lru_list(struct page *page, int lru)
+{
+}
+
+static inline void mem_cgroup_del_lru_list(struct page *page, int lru)
+{
+ return ;
+}
+
+static inline void mem_cgroup_rotate_lru_list(struct page *page, int lru)
+{
+ return ;
+}
+
+static inline void mem_cgroup_del_lru(struct page *page)
+{
+ return ;
+}
+
+static inline void
+mem_cgroup_move_lists(struct page *page, enum lru_list from, enum lru_list to)
+{
+}
+
+static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
+{
+ return 1;
+}
+
+static inline int task_in_mem_cgroup(struct task_struct *task,
+ const struct mem_cgroup *mem)
+{
+ return 1;
+}
+
+static inline int
+mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr)
+{
+ return 0;
+}
+
+static inline void mem_cgroup_end_migration(struct mem_cgroup *mem,
+ struct page *oldpage,
+ struct page *newpage)
+{
+}
+
+static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
+{
+ return 0;
+}
+
+static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
+ int priority)
+{
+}
+
+static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
+ int priority)
+{
+}
+
+static inline bool mem_cgroup_disabled(void)
+{
+ return true;
+}
+
+static inline bool mem_cgroup_oom_called(struct task_struct *task)
+{
+ return false;
+}
+
+static inline int
+mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg)
+{
+ return 1;
+}
+
+static inline int
+mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg)
+{
+ return 1;
+}
+
+static inline unsigned long
+mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg, struct zone *zone,
+ enum lru_list lru)
+{
+ 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_update_mapped_file_stat(struct page *page,
+ int val)
+{
+}
+
+static inline
+unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
+ gfp_t gfp_mask, int nid, int zid)
+{
+ return 0;
+}
+
+#endif /* CONFIG_CGROUP_MEM_CONT */
#endif /* _LINUX_MEMCONTROL_H */
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