diff options
Diffstat (limited to 'include/linux/memcontrol.h')
-rw-r--r-- | include/linux/memcontrol.h | 147 |
1 files changed, 109 insertions, 38 deletions
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 792c898..1191d79 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -28,6 +28,7 @@ #include <linux/eventfd.h> #include <linux/mmzone.h> #include <linux/writeback.h> +#include <linux/page-flags.h> struct mem_cgroup; struct page; @@ -51,7 +52,10 @@ enum mem_cgroup_stat_index { MEM_CGROUP_STAT_SWAP, /* # of pages, swapped out */ MEM_CGROUP_STAT_NSTATS, /* default hierarchy stats */ - MEMCG_SOCK = MEM_CGROUP_STAT_NSTATS, + MEMCG_KERNEL_STACK = MEM_CGROUP_STAT_NSTATS, + MEMCG_SLAB_RECLAIMABLE, + MEMCG_SLAB_UNRECLAIMABLE, + MEMCG_SOCK, MEMCG_NR_STAT, }; @@ -89,6 +93,10 @@ enum mem_cgroup_events_target { }; #ifdef CONFIG_MEMCG + +#define MEM_CGROUP_ID_SHIFT 16 +#define MEM_CGROUP_ID_MAX USHRT_MAX + struct mem_cgroup_stat_cpu { long count[MEMCG_NR_STAT]; unsigned long events[MEMCG_NR_EVENTS]; @@ -265,6 +273,11 @@ struct mem_cgroup { extern struct mem_cgroup *root_mem_cgroup; +static inline bool mem_cgroup_disabled(void) +{ + return !cgroup_subsys_enabled(memory_cgrp_subsys); +} + /** * mem_cgroup_events - count memory events against a cgroup * @memcg: the memory cgroup @@ -291,7 +304,7 @@ void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg, void mem_cgroup_uncharge(struct page *page); void mem_cgroup_uncharge_list(struct list_head *page_list); -void mem_cgroup_replace_page(struct page *oldpage, struct page *newpage); +void mem_cgroup_migrate(struct page *oldpage, struct page *newpage); struct lruvec *mem_cgroup_zone_lruvec(struct zone *, struct mem_cgroup *); struct lruvec *mem_cgroup_page_lruvec(struct page *, struct zone *); @@ -312,6 +325,28 @@ struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, struct mem_cgroup_reclaim_cookie *); void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); +static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) +{ + if (mem_cgroup_disabled()) + return 0; + + return memcg->css.id; +} + +/** + * mem_cgroup_from_id - look up a memcg from an id + * @id: the id to look up + * + * Caller must hold rcu_read_lock() and use css_tryget() as necessary. + */ +static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id) +{ + struct cgroup_subsys_state *css; + + css = css_from_id(id, &memory_cgrp_subsys); + return mem_cgroup_from_css(css); +} + /** * parent_mem_cgroup - find the accounting parent of a memcg * @memcg: memcg whose parent to find @@ -353,11 +388,6 @@ static inline bool mm_match_cgroup(struct mm_struct *mm, struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page); ino_t page_cgroup_ino(struct page *page); -static inline bool mem_cgroup_disabled(void) -{ - return !cgroup_subsys_enabled(memory_cgrp_subsys); -} - static inline bool mem_cgroup_online(struct mem_cgroup *memcg) { if (mem_cgroup_disabled()) @@ -373,6 +403,9 @@ int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, int nr_pages); +unsigned long mem_cgroup_node_nr_lru_pages(struct mem_cgroup *memcg, + int nid, unsigned int lru_mask); + static inline unsigned long mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru) { @@ -429,36 +462,43 @@ bool mem_cgroup_oom_synchronize(bool wait); extern int do_swap_account; #endif -struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page); -void mem_cgroup_end_page_stat(struct mem_cgroup *memcg); +void lock_page_memcg(struct page *page); +void unlock_page_memcg(struct page *page); /** * mem_cgroup_update_page_stat - update page state statistics - * @memcg: memcg to account against + * @page: the page * @idx: page state item to account * @val: number of pages (positive or negative) * - * See mem_cgroup_begin_page_stat() for locking requirements. + * The @page must be locked or the caller must use lock_page_memcg() + * to prevent double accounting when the page is concurrently being + * moved to another memcg: + * + * lock_page(page) or lock_page_memcg(page) + * if (TestClearPageState(page)) + * mem_cgroup_update_page_stat(page, state, -1); + * unlock_page(page) or unlock_page_memcg(page) */ -static inline void mem_cgroup_update_page_stat(struct mem_cgroup *memcg, +static inline void mem_cgroup_update_page_stat(struct page *page, enum mem_cgroup_stat_index idx, int val) { - VM_BUG_ON(!rcu_read_lock_held()); + VM_BUG_ON(!(rcu_read_lock_held() || PageLocked(page))); - if (memcg) - this_cpu_add(memcg->stat->count[idx], val); + if (page->mem_cgroup) + this_cpu_add(page->mem_cgroup->stat->count[idx], val); } -static inline void mem_cgroup_inc_page_stat(struct mem_cgroup *memcg, +static inline void mem_cgroup_inc_page_stat(struct page *page, enum mem_cgroup_stat_index idx) { - mem_cgroup_update_page_stat(memcg, idx, 1); + mem_cgroup_update_page_stat(page, idx, 1); } -static inline void mem_cgroup_dec_page_stat(struct mem_cgroup *memcg, +static inline void mem_cgroup_dec_page_stat(struct page *page, enum mem_cgroup_stat_index idx) { - mem_cgroup_update_page_stat(memcg, idx, -1); + mem_cgroup_update_page_stat(page, idx, -1); } unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, @@ -496,8 +536,17 @@ void mem_cgroup_split_huge_fixup(struct page *head); #endif #else /* CONFIG_MEMCG */ + +#define MEM_CGROUP_ID_SHIFT 0 +#define MEM_CGROUP_ID_MAX 0 + struct mem_cgroup; +static inline bool mem_cgroup_disabled(void) +{ + return true; +} + static inline void mem_cgroup_events(struct mem_cgroup *memcg, enum mem_cgroup_events_index idx, unsigned int nr) @@ -539,7 +588,7 @@ static inline void mem_cgroup_uncharge_list(struct list_head *page_list) { } -static inline void mem_cgroup_replace_page(struct page *old, struct page *new) +static inline void mem_cgroup_migrate(struct page *old, struct page *new) { } @@ -580,9 +629,16 @@ static inline void mem_cgroup_iter_break(struct mem_cgroup *root, { } -static inline bool mem_cgroup_disabled(void) +static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) { - return true; + return 0; +} + +static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id) +{ + WARN_ON_ONCE(id); + /* XXX: This should always return root_mem_cgroup */ + return NULL; } static inline bool mem_cgroup_online(struct mem_cgroup *memcg) @@ -608,17 +664,23 @@ mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, { } +static inline unsigned long +mem_cgroup_node_nr_lru_pages(struct mem_cgroup *memcg, + int nid, unsigned int lru_mask) +{ + return 0; +} + static inline void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) { } -static inline struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page) +static inline void lock_page_memcg(struct page *page) { - return NULL; } -static inline void mem_cgroup_end_page_stat(struct mem_cgroup *memcg) +static inline void unlock_page_memcg(struct page *page) { } @@ -644,12 +706,12 @@ static inline bool mem_cgroup_oom_synchronize(bool wait) return false; } -static inline void mem_cgroup_inc_page_stat(struct mem_cgroup *memcg, +static inline void mem_cgroup_inc_page_stat(struct page *page, enum mem_cgroup_stat_index idx) { } -static inline void mem_cgroup_dec_page_stat(struct mem_cgroup *memcg, +static inline void mem_cgroup_dec_page_stat(struct page *page, enum mem_cgroup_stat_index idx) { } @@ -743,11 +805,6 @@ static inline bool memcg_kmem_enabled(void) return static_branch_unlikely(&memcg_kmem_enabled_key); } -static inline bool memcg_kmem_online(struct mem_cgroup *memcg) -{ - return memcg->kmem_state == KMEM_ONLINE; -} - /* * In general, we'll do everything in our power to not incur in any overhead * for non-memcg users for the kmem functions. Not even a function call, if we @@ -765,7 +822,7 @@ int __memcg_kmem_charge(struct page *page, gfp_t gfp, int order); void __memcg_kmem_uncharge(struct page *page, int order); /* - * helper for acessing a memcg's index. It will be used as an index in the + * helper for accessing a memcg's index. It will be used as an index in the * child cache array in kmem_cache, and also to derive its name. This function * will return -1 when this is not a kmem-limited memcg. */ @@ -834,6 +891,20 @@ static __always_inline void memcg_kmem_put_cache(struct kmem_cache *cachep) if (memcg_kmem_enabled()) __memcg_kmem_put_cache(cachep); } + +/** + * memcg_kmem_update_page_stat - update kmem page state statistics + * @page: the page + * @idx: page state item to account + * @val: number of pages (positive or negative) + */ +static inline void memcg_kmem_update_page_stat(struct page *page, + enum mem_cgroup_stat_index idx, int val) +{ + if (memcg_kmem_enabled() && page->mem_cgroup) + this_cpu_add(page->mem_cgroup->stat->count[idx], val); +} + #else #define for_each_memcg_cache_index(_idx) \ for (; NULL; ) @@ -843,11 +914,6 @@ static inline bool memcg_kmem_enabled(void) return false; } -static inline bool memcg_kmem_online(struct mem_cgroup *memcg) -{ - return false; -} - static inline int memcg_kmem_charge(struct page *page, gfp_t gfp, int order) { return 0; @@ -879,6 +945,11 @@ memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp) static inline void memcg_kmem_put_cache(struct kmem_cache *cachep) { } + +static inline void memcg_kmem_update_page_stat(struct page *page, + enum mem_cgroup_stat_index idx, int val) +{ +} #endif /* CONFIG_MEMCG && !CONFIG_SLOB */ #endif /* _LINUX_MEMCONTROL_H */ |