diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/fsnotify_backend.h | 12 | ||||
| -rw-r--r-- | include/linux/memcontrol.h | 10 | ||||
| -rw-r--r-- | include/linux/sched.h | 3 | ||||
| -rw-r--r-- | include/linux/sched/mm.h | 37 |
4 files changed, 57 insertions, 5 deletions
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h index b38964a7a521..a0c4790c5302 100644 --- a/include/linux/fsnotify_backend.h +++ b/include/linux/fsnotify_backend.h @@ -84,6 +84,8 @@ struct fsnotify_event_private_data; struct fsnotify_fname; struct fsnotify_iter_info; +struct mem_cgroup; + /* * Each group much define these ops. The fsnotify infrastructure will call * these operations for each relevant group. @@ -127,6 +129,8 @@ struct fsnotify_event { * everything will be cleaned up. */ struct fsnotify_group { + const struct fsnotify_ops *ops; /* how this group handles things */ + /* * How the refcnt is used is up to each group. When the refcnt hits 0 * fsnotify will clean up all of the resources associated with this group. @@ -137,8 +141,6 @@ struct fsnotify_group { */ refcount_t refcnt; /* things with interest in this group */ - const struct fsnotify_ops *ops; /* how this group handles things */ - /* needed to send notification to userspace */ spinlock_t notification_lock; /* protect the notification_list */ struct list_head notification_list; /* list of event_holder this group needs to send to userspace */ @@ -160,6 +162,8 @@ struct fsnotify_group { atomic_t num_marks; /* 1 for each mark and 1 for not being * past the point of no return when freeing * a group */ + atomic_t user_waits; /* Number of tasks waiting for user + * response */ struct list_head marks_list; /* all inode marks for this group */ struct fasync_struct *fsn_fa; /* async notification */ @@ -167,8 +171,8 @@ struct fsnotify_group { struct fsnotify_event *overflow_event; /* Event we queue when the * notification list is too * full */ - atomic_t user_waits; /* Number of tasks waiting for user - * response */ + + struct mem_cgroup *memcg; /* memcg to charge allocations */ /* groups can define private fields here or use the void *private */ union { diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 42f4719def32..121e218d2a21 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -373,6 +373,8 @@ struct lruvec *mem_cgroup_page_lruvec(struct page *, struct pglist_data *); bool task_in_mem_cgroup(struct task_struct *task, struct mem_cgroup *memcg); struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); +struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm); + static inline struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){ return css ? container_of(css, struct mem_cgroup, css) : NULL; @@ -380,7 +382,8 @@ struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){ static inline void mem_cgroup_put(struct mem_cgroup *memcg) { - css_put(&memcg->css); + if (memcg) + css_put(&memcg->css); } #define mem_cgroup_from_counter(counter, member) \ @@ -855,6 +858,11 @@ static inline bool task_in_mem_cgroup(struct task_struct *task, return true; } +static inline struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm) +{ + return NULL; +} + static inline void mem_cgroup_put(struct mem_cgroup *memcg) { } diff --git a/include/linux/sched.h b/include/linux/sched.h index 95a5018c338e..1827f4a7a6de 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1152,6 +1152,9 @@ struct task_struct { /* Number of pages to reclaim on returning to userland: */ unsigned int memcg_nr_pages_over_high; + + /* Used by memcontrol for targeted memcg charge: */ + struct mem_cgroup *active_memcg; #endif #ifdef CONFIG_BLK_CGROUP diff --git a/include/linux/sched/mm.h b/include/linux/sched/mm.h index 44d356f5e47c..aebb370a0006 100644 --- a/include/linux/sched/mm.h +++ b/include/linux/sched/mm.h @@ -248,6 +248,43 @@ static inline void memalloc_noreclaim_restore(unsigned int flags) current->flags = (current->flags & ~PF_MEMALLOC) | flags; } +#ifdef CONFIG_MEMCG +/** + * memalloc_use_memcg - Starts the remote memcg charging scope. + * @memcg: memcg to charge. + * + * This function marks the beginning of the remote memcg charging scope. All the + * __GFP_ACCOUNT allocations till the end of the scope will be charged to the + * given memcg. + * + * NOTE: This function is not nesting safe. + */ +static inline void memalloc_use_memcg(struct mem_cgroup *memcg) +{ + WARN_ON_ONCE(current->active_memcg); + current->active_memcg = memcg; +} + +/** + * memalloc_unuse_memcg - Ends the remote memcg charging scope. + * + * This function marks the end of the remote memcg charging scope started by + * memalloc_use_memcg(). + */ +static inline void memalloc_unuse_memcg(void) +{ + current->active_memcg = NULL; +} +#else +static inline void memalloc_use_memcg(struct mem_cgroup *memcg) +{ +} + +static inline void memalloc_unuse_memcg(void) +{ +} +#endif + #ifdef CONFIG_MEMBARRIER enum { MEMBARRIER_STATE_PRIVATE_EXPEDITED_READY = (1U << 0), |