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author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-12 15:44:27 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-12 15:44:27 -0700 |
commit | ac4de9543aca59f2b763746647577302fbedd57e (patch) | |
tree | 40407750569ee030de56233c41c9a97f7e89cf67 /include/linux/memcontrol.h | |
parent | 26935fb06ee88f1188789807687c03041f3c70d9 (diff) | |
parent | de32a8177f64bc62e1b19c685dd391af664ab13f (diff) | |
download | talos-op-linux-ac4de9543aca59f2b763746647577302fbedd57e.tar.gz talos-op-linux-ac4de9543aca59f2b763746647577302fbedd57e.zip |
Merge branch 'akpm' (patches from Andrew Morton)
Merge more patches from Andrew Morton:
"The rest of MM. Plus one misc cleanup"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (35 commits)
mm/Kconfig: add MMU dependency for MIGRATION.
kernel: replace strict_strto*() with kstrto*()
mm, thp: count thp_fault_fallback anytime thp fault fails
thp: consolidate code between handle_mm_fault() and do_huge_pmd_anonymous_page()
thp: do_huge_pmd_anonymous_page() cleanup
thp: move maybe_pmd_mkwrite() out of mk_huge_pmd()
mm: cleanup add_to_page_cache_locked()
thp: account anon transparent huge pages into NR_ANON_PAGES
truncate: drop 'oldsize' truncate_pagecache() parameter
mm: make lru_add_drain_all() selective
memcg: document cgroup dirty/writeback memory statistics
memcg: add per cgroup writeback pages accounting
memcg: check for proper lock held in mem_cgroup_update_page_stat
memcg: remove MEMCG_NR_FILE_MAPPED
memcg: reduce function dereference
memcg: avoid overflow caused by PAGE_ALIGN
memcg: rename RESOURCE_MAX to RES_COUNTER_MAX
memcg: correct RESOURCE_MAX to ULLONG_MAX
mm: memcg: do not trap chargers with full callstack on OOM
mm: memcg: rework and document OOM waiting and wakeup
...
Diffstat (limited to 'include/linux/memcontrol.h')
-rw-r--r-- | include/linux/memcontrol.h | 148 |
1 files changed, 130 insertions, 18 deletions
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 6c416092e324..60e95872da29 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -30,9 +30,21 @@ struct page; struct mm_struct; struct kmem_cache; -/* Stats that can be updated by kernel. */ -enum mem_cgroup_page_stat_item { - MEMCG_NR_FILE_MAPPED, /* # of pages charged as file rss */ +/* + * The corresponding mem_cgroup_stat_names is defined in mm/memcontrol.c, + * These two lists should keep in accord with each other. + */ +enum mem_cgroup_stat_index { + /* + * For MEM_CONTAINER_TYPE_ALL, usage = pagecache + rss. + */ + MEM_CGROUP_STAT_CACHE, /* # of pages charged as cache */ + MEM_CGROUP_STAT_RSS, /* # of pages charged as anon rss */ + MEM_CGROUP_STAT_RSS_HUGE, /* # of pages charged as anon huge */ + MEM_CGROUP_STAT_FILE_MAPPED, /* # of pages charged as file rss */ + MEM_CGROUP_STAT_WRITEBACK, /* # of pages under writeback */ + MEM_CGROUP_STAT_SWAP, /* # of pages, swapped out */ + MEM_CGROUP_STAT_NSTATS, }; struct mem_cgroup_reclaim_cookie { @@ -41,6 +53,23 @@ struct mem_cgroup_reclaim_cookie { unsigned int generation; }; +enum mem_cgroup_filter_t { + VISIT, /* visit current node */ + SKIP, /* skip the current node and continue traversal */ + SKIP_TREE, /* skip the whole subtree and continue traversal */ +}; + +/* + * mem_cgroup_filter_t predicate might instruct mem_cgroup_iter_cond how to + * iterate through the hierarchy tree. Each tree element is checked by the + * predicate before it is returned by the iterator. If a filter returns + * SKIP or SKIP_TREE then the iterator code continues traversal (with the + * next node down the hierarchy or the next node that doesn't belong under the + * memcg's subtree). + */ +typedef enum mem_cgroup_filter_t +(*mem_cgroup_iter_filter)(struct mem_cgroup *memcg, struct mem_cgroup *root); + #ifdef CONFIG_MEMCG /* * All "charge" functions with gfp_mask should use GFP_KERNEL or @@ -108,9 +137,18 @@ mem_cgroup_prepare_migration(struct page *page, struct page *newpage, 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 *); +struct mem_cgroup *mem_cgroup_iter_cond(struct mem_cgroup *root, + struct mem_cgroup *prev, + struct mem_cgroup_reclaim_cookie *reclaim, + mem_cgroup_iter_filter cond); + +static inline struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *root, + struct mem_cgroup *prev, + struct mem_cgroup_reclaim_cookie *reclaim) +{ + return mem_cgroup_iter_cond(root, prev, reclaim, NULL); +} + void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); /* @@ -125,6 +163,48 @@ extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, extern void mem_cgroup_replace_page_cache(struct page *oldpage, struct page *newpage); +/** + * mem_cgroup_toggle_oom - toggle the memcg OOM killer for the current task + * @new: true to enable, false to disable + * + * Toggle whether a failed memcg charge should invoke the OOM killer + * or just return -ENOMEM. Returns the previous toggle state. + * + * NOTE: Any path that enables the OOM killer before charging must + * call mem_cgroup_oom_synchronize() afterward to finalize the + * OOM handling and clean up. + */ +static inline bool mem_cgroup_toggle_oom(bool new) +{ + bool old; + + old = current->memcg_oom.may_oom; + current->memcg_oom.may_oom = new; + + return old; +} + +static inline void mem_cgroup_enable_oom(void) +{ + bool old = mem_cgroup_toggle_oom(true); + + WARN_ON(old == true); +} + +static inline void mem_cgroup_disable_oom(void) +{ + bool old = mem_cgroup_toggle_oom(false); + + WARN_ON(old == false); +} + +static inline bool task_in_memcg_oom(struct task_struct *p) +{ + return p->memcg_oom.in_memcg_oom; +} + +bool mem_cgroup_oom_synchronize(void); + #ifdef CONFIG_MEMCG_SWAP extern int do_swap_account; #endif @@ -165,24 +245,24 @@ static inline void mem_cgroup_end_update_page_stat(struct page *page, } void mem_cgroup_update_page_stat(struct page *page, - enum mem_cgroup_page_stat_item idx, + enum mem_cgroup_stat_index idx, int val); static inline void mem_cgroup_inc_page_stat(struct page *page, - enum mem_cgroup_page_stat_item idx) + enum mem_cgroup_stat_index 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) + enum mem_cgroup_stat_index 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); +enum mem_cgroup_filter_t +mem_cgroup_soft_reclaim_eligible(struct mem_cgroup *memcg, + struct mem_cgroup *root); void __mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx); static inline void mem_cgroup_count_vm_event(struct mm_struct *mm, @@ -296,6 +376,15 @@ 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_cond(struct mem_cgroup *root, + struct mem_cgroup *prev, + struct mem_cgroup_reclaim_cookie *reclaim, + mem_cgroup_iter_filter cond) +{ + /* first call must return non-NULL, second return NULL */ + return (struct mem_cgroup *)(unsigned long)!prev; +} static inline struct mem_cgroup * mem_cgroup_iter(struct mem_cgroup *root, @@ -348,22 +437,45 @@ static inline void mem_cgroup_end_update_page_stat(struct page *page, { } +static inline bool mem_cgroup_toggle_oom(bool new) +{ + return false; +} + +static inline void mem_cgroup_enable_oom(void) +{ +} + +static inline void mem_cgroup_disable_oom(void) +{ +} + +static inline bool task_in_memcg_oom(struct task_struct *p) +{ + return false; +} + +static inline bool mem_cgroup_oom_synchronize(void) +{ + return false; +} + static inline void mem_cgroup_inc_page_stat(struct page *page, - enum mem_cgroup_page_stat_item idx) + enum mem_cgroup_stat_index idx) { } static inline void mem_cgroup_dec_page_stat(struct page *page, - enum mem_cgroup_page_stat_item idx) + enum mem_cgroup_stat_index idx) { } static inline -unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, - gfp_t gfp_mask, - unsigned long *total_scanned) +enum mem_cgroup_filter_t +mem_cgroup_soft_reclaim_eligible(struct mem_cgroup *memcg, + struct mem_cgroup *root) { - return 0; + return VISIT; } static inline void mem_cgroup_split_huge_fixup(struct page *head) |