X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=include%2Flinux%2Fmemcontrol.h;h=bf9213b2db8f2da2a443d8788d2d70eb0a003af8;hb=9a1607071c293e48b08bd703733480b1d55c7b93;hp=3f121b27677a870eebdbb85e9f886b1dee786447;hpb=8cdea7c05454260c0d4d83503949c358eb131d17;p=safe%2Fjmp%2Flinux-2.6 diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 3f121b2..bf9213b 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -3,6 +3,9 @@ * Copyright IBM Corporation, 2007 * Author Balbir Singh * + * Copyright 2007 OpenVZ SWsoft Inc + * Author: Pavel Emelianov + * * 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 @@ -16,6 +19,274 @@ #ifndef _LINUX_MEMCONTROL_H #define _LINUX_MEMCONTROL_H +#include +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 */