diff options
Diffstat (limited to 'include/linux/memcontrol.h')
| -rw-r--r-- | include/linux/memcontrol.h | 1049 |
1 files changed, 548 insertions, 501 deletions
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index d3c8203cab6c..0651865a4564 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -14,6 +14,7 @@ #include <linux/vm_event_item.h> #include <linux/hardirq.h> #include <linux/jump_label.h> +#include <linux/kernel.h> #include <linux/page_counter.h> #include <linux/vmpressure.h> #include <linux/eventfd.h> @@ -21,6 +22,7 @@ #include <linux/vmstat.h> #include <linux/writeback.h> #include <linux/page-flags.h> +#include <linux/shrinker.h> struct mem_cgroup; struct obj_cgroup; @@ -50,92 +52,74 @@ enum memcg_memory_event { MEMCG_SWAP_HIGH, MEMCG_SWAP_MAX, MEMCG_SWAP_FAIL, + MEMCG_SOCK_THROTTLED, MEMCG_NR_MEMORY_EVENTS, }; struct mem_cgroup_reclaim_cookie { pg_data_t *pgdat; - unsigned int generation; + int generation; }; #ifdef CONFIG_MEMCG #define MEM_CGROUP_ID_SHIFT 16 -#define MEM_CGROUP_ID_MAX USHRT_MAX struct mem_cgroup_id { int id; refcount_t ref; }; -/* - * Per memcg event counter is incremented at every pagein/pageout. With THP, - * it will be incremented by the number of pages. This counter is used - * to trigger some periodic events. This is straightforward and better - * than using jiffies etc. to handle periodic memcg event. - */ -enum mem_cgroup_events_target { - MEM_CGROUP_TARGET_THRESH, - MEM_CGROUP_TARGET_SOFTLIMIT, - MEM_CGROUP_NTARGETS, -}; - struct memcg_vmstats_percpu; +struct memcg1_events_percpu; struct memcg_vmstats; +struct lruvec_stats_percpu; +struct lruvec_stats; struct mem_cgroup_reclaim_iter { struct mem_cgroup *position; /* scan generation, increased every round-trip */ - unsigned int generation; -}; - -/* - * Bitmap and deferred work of shrinker::id corresponding to memcg-aware - * shrinkers, which have elements charged to this memcg. - */ -struct shrinker_info { - struct rcu_head rcu; - atomic_long_t *nr_deferred; - unsigned long *map; -}; - -struct lruvec_stats_percpu { - /* Local (CPU and cgroup) state */ - long state[NR_VM_NODE_STAT_ITEMS]; - - /* Delta calculation for lockless upward propagation */ - long state_prev[NR_VM_NODE_STAT_ITEMS]; -}; - -struct lruvec_stats { - /* Aggregated (CPU and subtree) state */ - long state[NR_VM_NODE_STAT_ITEMS]; - - /* Pending child counts during tree propagation */ - long state_pending[NR_VM_NODE_STAT_ITEMS]; + atomic_t generation; }; /* * per-node information in memory controller. */ struct mem_cgroup_per_node { - struct lruvec lruvec; + /* Keep the read-only fields at the start */ + struct mem_cgroup *memcg; /* Back pointer, we cannot */ + /* use container_of */ struct lruvec_stats_percpu __percpu *lruvec_stats_percpu; - struct lruvec_stats lruvec_stats; - - unsigned long lru_zone_size[MAX_NR_ZONES][NR_LRU_LISTS]; - - struct mem_cgroup_reclaim_iter iter; - + struct lruvec_stats *lruvec_stats; struct shrinker_info __rcu *shrinker_info; +#ifdef CONFIG_MEMCG_V1 + /* + * Memcg-v1 only stuff in middle as buffer between read mostly fields + * and update often fields to avoid false sharing. If v1 stuff is + * not present, an explicit padding is needed. + */ + struct rb_node tree_node; /* RB tree node */ unsigned long usage_in_excess;/* Set to the value by which */ /* the soft limit is exceeded*/ bool on_tree; - struct mem_cgroup *memcg; /* Back pointer, we cannot */ - /* use container_of */ +#else + CACHELINE_PADDING(_pad1_); +#endif + + /* Fields which get updated often at the end. */ + struct lruvec lruvec; + CACHELINE_PADDING(_pad2_); + unsigned long lru_zone_size[MAX_NR_ZONES][NR_LRU_LISTS]; + struct mem_cgroup_reclaim_iter iter; + +#ifdef CONFIG_MEMCG_NMI_SAFETY_REQUIRES_ATOMIC + /* slab stats for nmi context */ + atomic_t slab_reclaimable; + atomic_t slab_unreclaimable; +#endif }; struct mem_cgroup_threshold { @@ -150,7 +134,7 @@ struct mem_cgroup_threshold_ary { /* Size of entries[] */ unsigned int size; /* Array of thresholds */ - struct mem_cgroup_threshold entries[]; + struct mem_cgroup_threshold entries[] __counted_by(size); }; struct mem_cgroup_thresholds { @@ -217,18 +201,23 @@ struct mem_cgroup { struct page_counter memsw; /* v1 only */ }; - /* Legacy consumer-oriented counters */ - struct page_counter kmem; /* v1 only */ - struct page_counter tcpmem; /* v1 only */ + /* registered local peak watchers */ + struct list_head memory_peaks; + struct list_head swap_peaks; + spinlock_t peaks_lock; /* Range enforcement for interrupt charges */ struct work_struct high_work; -#if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_ZSWAP) +#ifdef CONFIG_ZSWAP unsigned long zswap_max; -#endif - unsigned long soft_limit; + /* + * Prevent pages from this memcg from being written back from zswap to + * swap, and from being swapped out on zswap store failures. + */ + bool zswap_writeback; +#endif /* vmpressure notifications */ struct vmpressure vmpressure; @@ -238,13 +227,7 @@ struct mem_cgroup { */ bool oom_group; - /* protected by memcg_oom_lock */ - bool oom_lock; - int under_oom; - - int swappiness; - /* OOM-Killer disable */ - int oom_kill_disable; + int swappiness; /* memory.events and memory.events.local */ struct cgroup_file events_file; @@ -253,29 +236,6 @@ struct mem_cgroup { /* handle for "memory.swap.events" */ struct cgroup_file swap_events_file; - /* protect arrays of thresholds */ - struct mutex thresholds_lock; - - /* thresholds for memory usage. RCU-protected */ - struct mem_cgroup_thresholds thresholds; - - /* thresholds for mem+swap usage. RCU-protected */ - struct mem_cgroup_thresholds memsw_thresholds; - - /* For oom notifier event fd */ - struct list_head oom_notify; - - /* - * Should we move charges of a task when a task is moved into this - * mem_cgroup ? And what type of charges should we move ? - */ - unsigned long move_charge_at_immigrate; - /* taken only while moving_account > 0 */ - spinlock_t move_lock; - unsigned long move_lock_flags; - - CACHELINE_PADDING(_pad1_); - /* memory.stat */ struct memcg_vmstats *vmstats; @@ -283,26 +243,29 @@ struct mem_cgroup { atomic_long_t memory_events[MEMCG_NR_MEMORY_EVENTS]; atomic_long_t memory_events_local[MEMCG_NR_MEMORY_EVENTS]; - unsigned long socket_pressure; - - /* Legacy tcp memory accounting */ - bool tcpmem_active; - int tcpmem_pressure; - -#ifdef CONFIG_MEMCG_KMEM - int kmemcg_id; - struct obj_cgroup __rcu *objcg; - /* list of inherited objcgs, protected by objcg_lock */ - struct list_head objcg_list; +#ifdef CONFIG_MEMCG_NMI_SAFETY_REQUIRES_ATOMIC + /* MEMCG_KMEM for nmi context */ + atomic_t kmem_stat; #endif - - CACHELINE_PADDING(_pad2_); - /* - * set > 0 if pages under this cgroup are moving to other cgroup. + * Hint of reclaim pressure for socket memroy management. Note + * that this indicator should NOT be used in legacy cgroup mode + * where socket memory is accounted/charged separately. */ - atomic_t moving_account; - struct task_struct *move_lock_task; + u64 socket_pressure; +#if BITS_PER_LONG < 64 + seqlock_t socket_pressure_seqlock; +#endif + int kmemcg_id; + /* + * memcg->objcg is wiped out as a part of the objcg repaprenting + * process. memcg->orig_objcg preserves a pointer (and a reference) + * to the original objcg until the end of live of memcg. + */ + struct obj_cgroup __rcu *objcg; + struct obj_cgroup *orig_objcg; + /* list of inherited objcgs, protected by objcg_lock */ + struct list_head objcg_list; struct memcg_vmstats_percpu __percpu *vmstats_percpu; @@ -312,19 +275,52 @@ struct mem_cgroup { struct memcg_cgwb_frn cgwb_frn[MEMCG_CGWB_FRN_CNT]; #endif - /* List of events which userspace want to receive */ - struct list_head event_list; - spinlock_t event_list_lock; - #ifdef CONFIG_TRANSPARENT_HUGEPAGE struct deferred_split deferred_split_queue; #endif -#ifdef CONFIG_LRU_GEN +#ifdef CONFIG_LRU_GEN_WALKS_MMU /* per-memcg mm_struct list */ struct lru_gen_mm_list mm_list; #endif +#ifdef CONFIG_MEMCG_V1 + /* Legacy consumer-oriented counters */ + struct page_counter kmem; /* v1 only */ + struct page_counter tcpmem; /* v1 only */ + + struct memcg1_events_percpu __percpu *events_percpu; + + unsigned long soft_limit; + + /* protected by memcg_oom_lock */ + bool oom_lock; + int under_oom; + + /* OOM-Killer disable */ + int oom_kill_disable; + + /* protect arrays of thresholds */ + struct mutex thresholds_lock; + + /* thresholds for memory usage. RCU-protected */ + struct mem_cgroup_thresholds thresholds; + + /* thresholds for mem+swap usage. RCU-protected */ + struct mem_cgroup_thresholds memsw_thresholds; + + /* For oom notifier event fd */ + struct list_head oom_notify; + + /* Legacy tcp memory accounting */ + bool tcpmem_active; + int tcpmem_pressure; + + /* List of events which userspace want to receive */ + struct list_head event_list; + spinlock_t event_list_lock; +#endif /* CONFIG_MEMCG_V1 */ + struct mem_cgroup_per_node *nodeinfo[]; }; @@ -338,15 +334,40 @@ struct mem_cgroup { extern struct mem_cgroup *root_mem_cgroup; enum page_memcg_data_flags { - /* page->memcg_data is a pointer to an objcgs vector */ - MEMCG_DATA_OBJCGS = (1UL << 0), + /* page->memcg_data is a pointer to an slabobj_ext vector */ + MEMCG_DATA_OBJEXTS = (1UL << 0), /* page has been accounted as a non-slab kernel page */ MEMCG_DATA_KMEM = (1UL << 1), /* the next bit after the last actual flag */ __NR_MEMCG_DATA_FLAGS = (1UL << 2), }; -#define MEMCG_DATA_FLAGS_MASK (__NR_MEMCG_DATA_FLAGS - 1) +#define __OBJEXTS_ALLOC_FAIL MEMCG_DATA_OBJEXTS +#define __FIRST_OBJEXT_FLAG __NR_MEMCG_DATA_FLAGS + +#else /* CONFIG_MEMCG */ + +#define __OBJEXTS_ALLOC_FAIL (1UL << 0) +#define __FIRST_OBJEXT_FLAG (1UL << 0) + +#endif /* CONFIG_MEMCG */ + +enum objext_flags { + /* + * Use bit 0 with zero other bits to signal that slabobj_ext vector + * failed to allocate. The same bit 0 with valid upper bits means + * MEMCG_DATA_OBJEXTS. + */ + OBJEXTS_ALLOC_FAIL = __OBJEXTS_ALLOC_FAIL, + /* slabobj_ext vector allocated with kmalloc_nolock() */ + OBJEXTS_NOSPIN_ALLOC = __FIRST_OBJEXT_FLAG, + /* the next bit after the last actual flag */ + __NR_OBJEXTS_FLAGS = (__FIRST_OBJEXT_FLAG << 1), +}; + +#define OBJEXTS_FLAGS_MASK (__NR_OBJEXTS_FLAGS - 1) + +#ifdef CONFIG_MEMCG static inline bool folio_memcg_kmem(struct folio *folio); @@ -354,11 +375,11 @@ static inline bool folio_memcg_kmem(struct folio *folio); * After the initialization objcg->memcg is always pointing at * a valid memcg, but can be atomically swapped to the parent memcg. * - * The caller must ensure that the returned memcg won't be released: - * e.g. acquire the rcu_read_lock or css_set_lock. + * The caller must ensure that the returned memcg won't be released. */ static inline struct mem_cgroup *obj_cgroup_memcg(struct obj_cgroup *objcg) { + lockdep_assert_once(rcu_read_lock_held() || lockdep_is_held(&cgroup_mutex)); return READ_ONCE(objcg->memcg); } @@ -377,10 +398,10 @@ static inline struct mem_cgroup *__folio_memcg(struct folio *folio) unsigned long memcg_data = folio->memcg_data; VM_BUG_ON_FOLIO(folio_test_slab(folio), folio); - VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_OBJCGS, folio); + VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_OBJEXTS, folio); VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_KMEM, folio); - return (struct mem_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); + return (struct mem_cgroup *)(memcg_data & ~OBJEXTS_FLAGS_MASK); } /* @@ -398,10 +419,10 @@ static inline struct obj_cgroup *__folio_objcg(struct folio *folio) unsigned long memcg_data = folio->memcg_data; VM_BUG_ON_FOLIO(folio_test_slab(folio), folio); - VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_OBJCGS, folio); + VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_OBJEXTS, folio); VM_BUG_ON_FOLIO(!(memcg_data & MEMCG_DATA_KMEM), folio); - return (struct obj_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); + return (struct obj_cgroup *)(memcg_data & ~OBJEXTS_FLAGS_MASK); } /* @@ -418,9 +439,7 @@ static inline struct obj_cgroup *__folio_objcg(struct folio *folio) * * - the folio lock * - LRU isolation - * - lock_page_memcg() * - exclusive reference - * - mem_cgroup_trylock_pages() * * For a kmem folio a caller should hold an rcu read lock to protect memcg * associated with a kmem folio from being released. @@ -432,80 +451,63 @@ static inline struct mem_cgroup *folio_memcg(struct folio *folio) return __folio_memcg(folio); } -static inline struct mem_cgroup *page_memcg(struct page *page) -{ - return folio_memcg(page_folio(page)); -} - -/** - * folio_memcg_rcu - Locklessly get the memory cgroup associated with a folio. +/* + * folio_memcg_charged - If a folio is charged to a memory cgroup. * @folio: Pointer to the folio. * - * This function assumes that the folio is known to have a - * proper memory cgroup pointer. It's not safe to call this function - * against some type of folios, e.g. slab folios or ex-slab folios. - * - * Return: A pointer to the memory cgroup associated with the folio, - * or NULL. + * Returns true if folio is charged to a memory cgroup, otherwise returns false. */ -static inline struct mem_cgroup *folio_memcg_rcu(struct folio *folio) +static inline bool folio_memcg_charged(struct folio *folio) { - unsigned long memcg_data = READ_ONCE(folio->memcg_data); - - VM_BUG_ON_FOLIO(folio_test_slab(folio), folio); - WARN_ON_ONCE(!rcu_read_lock_held()); - - if (memcg_data & MEMCG_DATA_KMEM) { - struct obj_cgroup *objcg; - - objcg = (void *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); - return obj_cgroup_memcg(objcg); - } - - return (struct mem_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); + return folio->memcg_data != 0; } /* - * page_memcg_check - get the memory cgroup associated with a page - * @page: a pointer to the page struct + * folio_memcg_check - Get the memory cgroup associated with a folio. + * @folio: Pointer to the folio. * - * Returns a pointer to the memory cgroup associated with the page, - * or NULL. This function unlike page_memcg() can take any page - * as an argument. It has to be used in cases when it's not known if a page + * Returns a pointer to the memory cgroup associated with the folio, + * or NULL. This function unlike folio_memcg() can take any folio + * as an argument. It has to be used in cases when it's not known if a folio * has an associated memory cgroup pointer or an object cgroups vector or * an object cgroup. * - * For a non-kmem page any of the following ensures page and memcg binding + * For a non-kmem folio any of the following ensures folio and memcg binding * stability: * - * - the page lock + * - the folio lock * - LRU isolation - * - lock_page_memcg() * - exclusive reference - * - mem_cgroup_trylock_pages() * - * For a kmem page a caller should hold an rcu read lock to protect memcg - * associated with a kmem page from being released. + * For a kmem folio a caller should hold an rcu read lock to protect memcg + * associated with a kmem folio from being released. */ -static inline struct mem_cgroup *page_memcg_check(struct page *page) +static inline struct mem_cgroup *folio_memcg_check(struct folio *folio) { /* - * Because page->memcg_data might be changed asynchronously - * for slab pages, READ_ONCE() should be used here. + * Because folio->memcg_data might be changed asynchronously + * for slabs, READ_ONCE() should be used here. */ - unsigned long memcg_data = READ_ONCE(page->memcg_data); + unsigned long memcg_data = READ_ONCE(folio->memcg_data); - if (memcg_data & MEMCG_DATA_OBJCGS) + if (memcg_data & MEMCG_DATA_OBJEXTS) return NULL; if (memcg_data & MEMCG_DATA_KMEM) { struct obj_cgroup *objcg; - objcg = (void *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); + objcg = (void *)(memcg_data & ~OBJEXTS_FLAGS_MASK); return obj_cgroup_memcg(objcg); } - return (struct mem_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); + return (struct mem_cgroup *)(memcg_data & ~OBJEXTS_FLAGS_MASK); +} + +static inline struct mem_cgroup *page_memcg_check(struct page *page) +{ + if (PageTail(page)) + return NULL; + return folio_memcg_check((struct folio *)page); } static inline struct mem_cgroup *get_mem_cgroup_from_objcg(struct obj_cgroup *objcg) @@ -522,7 +524,6 @@ retry: return memcg; } -#ifdef CONFIG_MEMCG_KMEM /* * folio_memcg_kmem - Check if the folio has the memcg_kmem flag set. * @folio: Pointer to the folio. @@ -534,19 +535,10 @@ retry: static inline bool folio_memcg_kmem(struct folio *folio) { VM_BUG_ON_PGFLAGS(PageTail(&folio->page), &folio->page); - VM_BUG_ON_FOLIO(folio->memcg_data & MEMCG_DATA_OBJCGS, folio); + VM_BUG_ON_FOLIO(folio->memcg_data & MEMCG_DATA_OBJEXTS, folio); return folio->memcg_data & MEMCG_DATA_KMEM; } - -#else -static inline bool folio_memcg_kmem(struct folio *folio) -{ - return false; -} - -#endif - static inline bool PageMemcgKmem(struct page *page) { return folio_memcg_kmem(page_folio(page)); @@ -575,7 +567,7 @@ static inline void mem_cgroup_protection(struct mem_cgroup *root, /* * There is no reclaim protection applied to a targeted reclaim. * We are special casing this specific case here because - * mem_cgroup_protected calculation is not robust enough to keep + * mem_cgroup_calculate_protection is not robust enough to keep * the protection invariant for calculated effective values for * parallel reclaimers with different reclaim target. This is * especially a problem for tail memcgs (as they have pages on LRU) @@ -671,9 +663,10 @@ static inline int mem_cgroup_charge(struct folio *folio, struct mm_struct *mm, return __mem_cgroup_charge(folio, mm, gfp); } +int mem_cgroup_charge_hugetlb(struct folio* folio, gfp_t gfp); + int mem_cgroup_swapin_charge_folio(struct folio *folio, struct mm_struct *mm, gfp_t gfp, swp_entry_t entry); -void mem_cgroup_swapin_uncharge_swap(swp_entry_t entry); void __mem_cgroup_uncharge(struct folio *folio); @@ -690,14 +683,15 @@ static inline void mem_cgroup_uncharge(struct folio *folio) __mem_cgroup_uncharge(folio); } -void __mem_cgroup_uncharge_list(struct list_head *page_list); -static inline void mem_cgroup_uncharge_list(struct list_head *page_list) +void __mem_cgroup_uncharge_folios(struct folio_batch *folios); +static inline void mem_cgroup_uncharge_folios(struct folio_batch *folios) { if (mem_cgroup_disabled()) return; - __mem_cgroup_uncharge_list(page_list); + __mem_cgroup_uncharge_folios(folios); } +void mem_cgroup_replace_folio(struct folio *old, struct folio *new); void mem_cgroup_migrate(struct folio *old, struct folio *new); /** @@ -754,6 +748,10 @@ struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm); +struct mem_cgroup *get_mem_cgroup_from_current(void); + +struct mem_cgroup *get_mem_cgroup_from_folio(struct folio *folio); + struct lruvec *folio_lruvec_lock(struct folio *folio); struct lruvec *folio_lruvec_lock_irq(struct folio *folio); struct lruvec *folio_lruvec_lock_irqsave(struct folio *folio, @@ -791,7 +789,18 @@ static inline void obj_cgroup_get_many(struct obj_cgroup *objcg, static inline void obj_cgroup_put(struct obj_cgroup *objcg) { - percpu_ref_put(&objcg->refcnt); + if (objcg) + percpu_ref_put(&objcg->refcnt); +} + +static inline bool mem_cgroup_tryget(struct mem_cgroup *memcg) +{ + return !memcg || css_tryget(&memcg->css); +} + +static inline bool mem_cgroup_tryget_online(struct mem_cgroup *memcg) +{ + return !memcg || css_tryget_online(&memcg->css); } static inline void mem_cgroup_put(struct mem_cgroup *memcg) @@ -807,8 +816,8 @@ struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, struct mem_cgroup *, struct mem_cgroup_reclaim_cookie *); void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); -int mem_cgroup_scan_tasks(struct mem_cgroup *, - int (*)(struct task_struct *, void *), void *); +void mem_cgroup_scan_tasks(struct mem_cgroup *memcg, + int (*)(struct task_struct *, void *), void *arg); static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) { @@ -848,8 +857,7 @@ static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) * parent_mem_cgroup - find the accounting parent of a memcg * @memcg: memcg whose parent to find * - * Returns the parent memcg, or NULL if this is the root or the memory - * controller is in legacy no-hierarchy mode. + * Returns the parent memcg, or NULL if this is the root. */ static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) { @@ -878,7 +886,7 @@ static inline bool mm_match_cgroup(struct mm_struct *mm, return match; } -struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page); +struct cgroup_subsys_state *mem_cgroup_css_from_folio(struct folio *folio); ino_t page_cgroup_ino(struct page *page); static inline bool mem_cgroup_online(struct mem_cgroup *memcg) @@ -901,7 +909,13 @@ unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, return READ_ONCE(mz->lru_zone_size[zone_idx][lru]); } -void mem_cgroup_handle_over_high(void); +void __mem_cgroup_handle_over_high(gfp_t gfp_mask); + +static inline void mem_cgroup_handle_over_high(gfp_t gfp_mask) +{ + if (unlikely(current->memcg_nr_pages_over_high)) + __mem_cgroup_handle_over_high(gfp_mask); +} unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg); @@ -912,65 +926,16 @@ void mem_cgroup_print_oom_context(struct mem_cgroup *memcg, void mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg); -static inline void mem_cgroup_enter_user_fault(void) -{ - WARN_ON(current->in_user_fault); - current->in_user_fault = 1; -} - -static inline void mem_cgroup_exit_user_fault(void) -{ - WARN_ON(!current->in_user_fault); - current->in_user_fault = 0; -} - -static inline bool task_in_memcg_oom(struct task_struct *p) -{ - return p->memcg_in_oom; -} - -bool mem_cgroup_oom_synchronize(bool wait); struct mem_cgroup *mem_cgroup_get_oom_group(struct task_struct *victim, struct mem_cgroup *oom_domain); void mem_cgroup_print_oom_group(struct mem_cgroup *memcg); -void folio_memcg_lock(struct folio *folio); -void folio_memcg_unlock(struct folio *folio); -void lock_page_memcg(struct page *page); -void unlock_page_memcg(struct page *page); - -void __mod_memcg_state(struct mem_cgroup *memcg, int idx, int val); - -/* try to stablize folio_memcg() for all the pages in a memcg */ -static inline bool mem_cgroup_trylock_pages(struct mem_cgroup *memcg) -{ - rcu_read_lock(); - - if (mem_cgroup_disabled() || !atomic_read(&memcg->moving_account)) - return true; - - rcu_read_unlock(); - return false; -} - -static inline void mem_cgroup_unlock_pages(void) -{ - rcu_read_unlock(); -} - /* idx can be of type enum memcg_stat_item or node_stat_item */ -static inline void mod_memcg_state(struct mem_cgroup *memcg, - int idx, int val) -{ - unsigned long flags; - - local_irq_save(flags); - __mod_memcg_state(memcg, idx, val); - local_irq_restore(flags); -} +void mod_memcg_state(struct mem_cgroup *memcg, + enum memcg_stat_item idx, int val); static inline void mod_memcg_page_state(struct page *page, - int idx, int val) + enum memcg_stat_item idx, int val) { struct mem_cgroup *memcg; @@ -978,101 +943,24 @@ static inline void mod_memcg_page_state(struct page *page, return; rcu_read_lock(); - memcg = page_memcg(page); + memcg = folio_memcg(page_folio(page)); if (memcg) mod_memcg_state(memcg, idx, val); rcu_read_unlock(); } unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx); +unsigned long lruvec_page_state(struct lruvec *lruvec, enum node_stat_item idx); +unsigned long lruvec_page_state_local(struct lruvec *lruvec, + enum node_stat_item idx); -static inline unsigned long lruvec_page_state(struct lruvec *lruvec, - enum node_stat_item idx) -{ - struct mem_cgroup_per_node *pn; - long x; - - if (mem_cgroup_disabled()) - return node_page_state(lruvec_pgdat(lruvec), idx); - - pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); - x = READ_ONCE(pn->lruvec_stats.state[idx]); -#ifdef CONFIG_SMP - if (x < 0) - x = 0; -#endif - return x; -} - -static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, - enum node_stat_item idx) -{ - struct mem_cgroup_per_node *pn; - long x = 0; - int cpu; - - if (mem_cgroup_disabled()) - return node_page_state(lruvec_pgdat(lruvec), idx); - - pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); - for_each_possible_cpu(cpu) - x += per_cpu(pn->lruvec_stats_percpu->state[idx], cpu); -#ifdef CONFIG_SMP - if (x < 0) - x = 0; -#endif - return x; -} - -void mem_cgroup_flush_stats(void); -void mem_cgroup_flush_stats_delayed(void); +void mem_cgroup_flush_stats(struct mem_cgroup *memcg); +void mem_cgroup_flush_stats_ratelimited(struct mem_cgroup *memcg); -void __mod_memcg_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx, - int val); -void __mod_lruvec_kmem_state(void *p, enum node_stat_item idx, int val); +void mod_lruvec_kmem_state(void *p, enum node_stat_item idx, int val); -static inline void mod_lruvec_kmem_state(void *p, enum node_stat_item idx, - int val) -{ - unsigned long flags; - - local_irq_save(flags); - __mod_lruvec_kmem_state(p, idx, val); - local_irq_restore(flags); -} - -static inline void mod_memcg_lruvec_state(struct lruvec *lruvec, - enum node_stat_item idx, int val) -{ - unsigned long flags; - - local_irq_save(flags); - __mod_memcg_lruvec_state(lruvec, idx, val); - local_irq_restore(flags); -} - -void __count_memcg_events(struct mem_cgroup *memcg, enum vm_event_item idx, - unsigned long count); - -static inline void count_memcg_events(struct mem_cgroup *memcg, - enum vm_event_item idx, - unsigned long count) -{ - unsigned long flags; - - local_irq_save(flags); - __count_memcg_events(memcg, idx, count); - local_irq_restore(flags); -} - -static inline void count_memcg_page_event(struct page *page, - enum vm_event_item idx) -{ - struct mem_cgroup *memcg = page_memcg(page); - - if (memcg) - count_memcg_events(memcg, idx, 1); -} +void count_memcg_events(struct mem_cgroup *memcg, enum vm_event_item idx, + unsigned long count); static inline void count_memcg_folio_events(struct folio *folio, enum vm_event_item idx, unsigned long nr) @@ -1083,8 +971,8 @@ static inline void count_memcg_folio_events(struct folio *folio, count_memcg_events(memcg, idx, nr); } -static inline void count_memcg_event_mm(struct mm_struct *mm, - enum vm_event_item idx) +static inline void count_memcg_events_mm(struct mm_struct *mm, + enum vm_event_item idx, unsigned long count) { struct mem_cgroup *memcg; @@ -1094,33 +982,23 @@ static inline void count_memcg_event_mm(struct mm_struct *mm, rcu_read_lock(); memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); if (likely(memcg)) - count_memcg_events(memcg, idx, 1); + count_memcg_events(memcg, idx, count); rcu_read_unlock(); } -static inline void memcg_memory_event(struct mem_cgroup *memcg, - enum memcg_memory_event event) +static inline void count_memcg_event_mm(struct mm_struct *mm, + enum vm_event_item idx) { - bool swap_event = event == MEMCG_SWAP_HIGH || event == MEMCG_SWAP_MAX || - event == MEMCG_SWAP_FAIL; - - atomic_long_inc(&memcg->memory_events_local[event]); - if (!swap_event) - cgroup_file_notify(&memcg->events_local_file); + count_memcg_events_mm(mm, idx, 1); +} - do { - atomic_long_inc(&memcg->memory_events[event]); - if (swap_event) - cgroup_file_notify(&memcg->swap_events_file); - else - cgroup_file_notify(&memcg->events_file); +void __memcg_memory_event(struct mem_cgroup *memcg, + enum memcg_memory_event event, bool allow_spinning); - if (!cgroup_subsys_on_dfl(memory_cgrp_subsys)) - break; - if (cgrp_dfl_root.flags & CGRP_ROOT_MEMORY_LOCAL_EVENTS) - break; - } while ((memcg = parent_mem_cgroup(memcg)) && - !mem_cgroup_is_root(memcg)); +static inline void memcg_memory_event(struct mem_cgroup *memcg, + enum memcg_memory_event event) +{ + __memcg_memory_event(memcg, event, true); } static inline void memcg_memory_event_mm(struct mm_struct *mm, @@ -1138,30 +1016,46 @@ static inline void memcg_memory_event_mm(struct mm_struct *mm, rcu_read_unlock(); } -void split_page_memcg(struct page *head, unsigned int nr); +void split_page_memcg(struct page *first, unsigned order); +void folio_split_memcg_refs(struct folio *folio, unsigned old_order, + unsigned new_order); -unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, - gfp_t gfp_mask, - unsigned long *total_scanned); +static inline u64 cgroup_id_from_mm(struct mm_struct *mm) +{ + struct mem_cgroup *memcg; + u64 id; + if (mem_cgroup_disabled()) + return 0; + + rcu_read_lock(); + memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); + if (!memcg) + memcg = root_mem_cgroup; + id = cgroup_id(memcg->css.cgroup); + rcu_read_unlock(); + return id; +} + +extern int mem_cgroup_init(void); #else /* CONFIG_MEMCG */ #define MEM_CGROUP_ID_SHIFT 0 -#define MEM_CGROUP_ID_MAX 0 + +#define root_mem_cgroup (NULL) static inline struct mem_cgroup *folio_memcg(struct folio *folio) { return NULL; } -static inline struct mem_cgroup *page_memcg(struct page *page) +static inline bool folio_memcg_charged(struct folio *folio) { - return NULL; + return false; } -static inline struct mem_cgroup *folio_memcg_rcu(struct folio *folio) +static inline struct mem_cgroup *folio_memcg_check(struct folio *folio) { - WARN_ON_ONCE(!rcu_read_lock_held()); return NULL; } @@ -1170,6 +1064,11 @@ static inline struct mem_cgroup *page_memcg_check(struct page *page) return NULL; } +static inline struct mem_cgroup *get_mem_cgroup_from_objcg(struct obj_cgroup *objcg) +{ + return NULL; +} + static inline bool folio_memcg_kmem(struct folio *folio) { return false; @@ -1236,21 +1135,27 @@ static inline int mem_cgroup_charge(struct folio *folio, return 0; } +static inline int mem_cgroup_charge_hugetlb(struct folio* folio, gfp_t gfp) +{ + return 0; +} + static inline int mem_cgroup_swapin_charge_folio(struct folio *folio, struct mm_struct *mm, gfp_t gfp, swp_entry_t entry) { return 0; } -static inline void mem_cgroup_swapin_uncharge_swap(swp_entry_t entry) +static inline void mem_cgroup_uncharge(struct folio *folio) { } -static inline void mem_cgroup_uncharge(struct folio *folio) +static inline void mem_cgroup_uncharge_folios(struct folio_batch *folios) { } -static inline void mem_cgroup_uncharge_list(struct list_head *page_list) +static inline void mem_cgroup_replace_folio(struct folio *old, + struct folio *new) { } @@ -1291,16 +1196,40 @@ static inline struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm) return NULL; } +static inline struct mem_cgroup *get_mem_cgroup_from_current(void) +{ + return NULL; +} + +static inline struct mem_cgroup *get_mem_cgroup_from_folio(struct folio *folio) +{ + return NULL; +} + static inline struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css) { return NULL; } +static inline void obj_cgroup_get(struct obj_cgroup *objcg) +{ +} + static inline void obj_cgroup_put(struct obj_cgroup *objcg) { } +static inline bool mem_cgroup_tryget(struct mem_cgroup *memcg) +{ + return true; +} + +static inline bool mem_cgroup_tryget_online(struct mem_cgroup *memcg) +{ + return true; +} + static inline void mem_cgroup_put(struct mem_cgroup *memcg) { } @@ -1343,10 +1272,9 @@ static inline void mem_cgroup_iter_break(struct mem_cgroup *root, { } -static inline int mem_cgroup_scan_tasks(struct mem_cgroup *memcg, +static inline void mem_cgroup_scan_tasks(struct mem_cgroup *memcg, int (*fn)(struct task_struct *, void *), void *arg) { - return 0; } static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) @@ -1415,54 +1343,8 @@ mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg) { } -static inline void lock_page_memcg(struct page *page) -{ -} - -static inline void unlock_page_memcg(struct page *page) -{ -} - -static inline void folio_memcg_lock(struct folio *folio) -{ -} - -static inline void folio_memcg_unlock(struct folio *folio) -{ -} - -static inline bool mem_cgroup_trylock_pages(struct mem_cgroup *memcg) -{ - /* to match folio_memcg_rcu() */ - rcu_read_lock(); - return true; -} - -static inline void mem_cgroup_unlock_pages(void) +static inline void mem_cgroup_handle_over_high(gfp_t gfp_mask) { - rcu_read_unlock(); -} - -static inline void mem_cgroup_handle_over_high(void) -{ -} - -static inline void mem_cgroup_enter_user_fault(void) -{ -} - -static inline void mem_cgroup_exit_user_fault(void) -{ -} - -static inline bool task_in_memcg_oom(struct task_struct *p) -{ - return false; -} - -static inline bool mem_cgroup_oom_synchronize(bool wait) -{ - return false; } static inline struct mem_cgroup *mem_cgroup_get_oom_group( @@ -1475,20 +1357,14 @@ static inline void mem_cgroup_print_oom_group(struct mem_cgroup *memcg) { } -static inline void __mod_memcg_state(struct mem_cgroup *memcg, - int idx, - int nr) -{ -} - static inline void mod_memcg_state(struct mem_cgroup *memcg, - int idx, + enum memcg_stat_item idx, int nr) { } static inline void mod_memcg_page_state(struct page *page, - int idx, int val) + enum memcg_stat_item idx, int val) { } @@ -1509,25 +1385,12 @@ static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, return node_page_state(lruvec_pgdat(lruvec), idx); } -static inline void mem_cgroup_flush_stats(void) -{ -} - -static inline void mem_cgroup_flush_stats_delayed(void) -{ -} - -static inline void __mod_memcg_lruvec_state(struct lruvec *lruvec, - enum node_stat_item idx, int val) +static inline void mem_cgroup_flush_stats(struct mem_cgroup *memcg) { } -static inline void __mod_lruvec_kmem_state(void *p, enum node_stat_item idx, - int val) +static inline void mem_cgroup_flush_stats_ratelimited(struct mem_cgroup *memcg) { - struct page *page = virt_to_head_page(p); - - __mod_node_page_state(page_pgdat(page), idx, val); } static inline void mod_lruvec_kmem_state(void *p, enum node_stat_item idx, @@ -1539,24 +1402,18 @@ static inline void mod_lruvec_kmem_state(void *p, enum node_stat_item idx, } static inline void count_memcg_events(struct mem_cgroup *memcg, - enum vm_event_item idx, - unsigned long count) -{ -} - -static inline void __count_memcg_events(struct mem_cgroup *memcg, enum vm_event_item idx, unsigned long count) { } -static inline void count_memcg_page_event(struct page *page, - int idx) +static inline void count_memcg_folio_events(struct folio *folio, + enum vm_event_item idx, unsigned long nr) { } -static inline void count_memcg_folio_events(struct folio *folio, - enum vm_event_item idx, unsigned long nr) +static inline void count_memcg_events_mm(struct mm_struct *mm, + enum vm_event_item idx, unsigned long count) { } @@ -1565,28 +1422,35 @@ void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx) { } -static inline void split_page_memcg(struct page *head, unsigned int nr) +static inline void split_page_memcg(struct page *first, unsigned order) { } -static inline -unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, - gfp_t gfp_mask, - unsigned long *total_scanned) +static inline void folio_split_memcg_refs(struct folio *folio, + unsigned old_order, unsigned new_order) { - return 0; } -#endif /* CONFIG_MEMCG */ -static inline void __inc_lruvec_kmem_state(void *p, enum node_stat_item idx) +static inline u64 cgroup_id_from_mm(struct mm_struct *mm) { - __mod_lruvec_kmem_state(p, idx, 1); + return 0; } -static inline void __dec_lruvec_kmem_state(void *p, enum node_stat_item idx) -{ - __mod_lruvec_kmem_state(p, idx, -1); -} +static inline int mem_cgroup_init(void) { return 0; } +#endif /* CONFIG_MEMCG */ + +/* + * Extended information for slab objects stored as an array in page->memcg_data + * if MEMCG_DATA_OBJEXTS is set. + */ +struct slabobj_ext { +#ifdef CONFIG_MEMCG + struct obj_cgroup *objcg; +#endif +#ifdef CONFIG_MEM_ALLOC_PROFILING + union codetag_ref ref; +#endif +} __aligned(8); static inline struct lruvec *parent_lruvec(struct lruvec *lruvec) { @@ -1617,7 +1481,7 @@ static inline void unlock_page_lruvec_irqrestore(struct lruvec *lruvec, spin_unlock_irqrestore(&lruvec->lru_lock, flags); } -/* Test requires a stable page->memcg binding, see page_memcg() */ +/* Test requires a stable folio->memcg binding, see folio_memcg() */ static inline bool folio_matches_lruvec(struct folio *folio, struct lruvec *lruvec) { @@ -1639,18 +1503,18 @@ static inline struct lruvec *folio_lruvec_relock_irq(struct folio *folio, return folio_lruvec_lock_irq(folio); } -/* Don't lock again iff page's lruvec locked */ -static inline struct lruvec *folio_lruvec_relock_irqsave(struct folio *folio, - struct lruvec *locked_lruvec, unsigned long *flags) +/* Don't lock again iff folio's lruvec locked */ +static inline void folio_lruvec_relock_irqsave(struct folio *folio, + struct lruvec **lruvecp, unsigned long *flags) { - if (locked_lruvec) { - if (folio_matches_lruvec(folio, locked_lruvec)) - return locked_lruvec; + if (*lruvecp) { + if (folio_matches_lruvec(folio, *lruvecp)) + return; - unlock_page_lruvec_irqrestore(locked_lruvec, *flags); + unlock_page_lruvec_irqrestore(*lruvecp, *flags); } - return folio_lruvec_lock_irqsave(folio, flags); + *lruvecp = folio_lruvec_lock_irqsave(folio, flags); } #ifdef CONFIG_CGROUP_WRITEBACK @@ -1666,10 +1530,13 @@ void mem_cgroup_track_foreign_dirty_slowpath(struct folio *folio, static inline void mem_cgroup_track_foreign_dirty(struct folio *folio, struct bdi_writeback *wb) { + struct mem_cgroup *memcg; + if (mem_cgroup_disabled()) return; - if (unlikely(&folio_memcg(folio)->css != wb->memcg_css)) + memcg = folio_memcg(folio); + if (unlikely(memcg && &memcg->css != wb->memcg_css)) mem_cgroup_track_foreign_dirty_slowpath(folio, wb); } @@ -1702,73 +1569,152 @@ static inline void mem_cgroup_flush_foreign(struct bdi_writeback *wb) #endif /* CONFIG_CGROUP_WRITEBACK */ struct sock; -bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages, - gfp_t gfp_mask); -void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); #ifdef CONFIG_MEMCG extern struct static_key_false memcg_sockets_enabled_key; #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key) + void mem_cgroup_sk_alloc(struct sock *sk); void mem_cgroup_sk_free(struct sock *sk); -static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) +void mem_cgroup_sk_inherit(const struct sock *sk, struct sock *newsk); +bool mem_cgroup_sk_charge(const struct sock *sk, unsigned int nr_pages, + gfp_t gfp_mask); +void mem_cgroup_sk_uncharge(const struct sock *sk, unsigned int nr_pages); + +#if BITS_PER_LONG < 64 +static inline void mem_cgroup_set_socket_pressure(struct mem_cgroup *memcg) { - if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && memcg->tcpmem_pressure) - return true; + u64 val = get_jiffies_64() + HZ; + unsigned long flags; + + write_seqlock_irqsave(&memcg->socket_pressure_seqlock, flags); + memcg->socket_pressure = val; + write_sequnlock_irqrestore(&memcg->socket_pressure_seqlock, flags); +} + +static inline u64 mem_cgroup_get_socket_pressure(struct mem_cgroup *memcg) +{ + unsigned int seq; + u64 val; + do { - if (time_before(jiffies, READ_ONCE(memcg->socket_pressure))) - return true; - } while ((memcg = parent_mem_cgroup(memcg))); - return false; + seq = read_seqbegin(&memcg->socket_pressure_seqlock); + val = memcg->socket_pressure; + } while (read_seqretry(&memcg->socket_pressure_seqlock, seq)); + + return val; } +#else +static inline void mem_cgroup_set_socket_pressure(struct mem_cgroup *memcg) +{ + WRITE_ONCE(memcg->socket_pressure, jiffies + HZ); +} + +static inline u64 mem_cgroup_get_socket_pressure(struct mem_cgroup *memcg) +{ + return READ_ONCE(memcg->socket_pressure); +} +#endif int alloc_shrinker_info(struct mem_cgroup *memcg); void free_shrinker_info(struct mem_cgroup *memcg); void set_shrinker_bit(struct mem_cgroup *memcg, int nid, int shrinker_id); void reparent_shrinker_deferred(struct mem_cgroup *memcg); + +static inline int shrinker_id(struct shrinker *shrinker) +{ + return shrinker->id; +} #else #define mem_cgroup_sockets_enabled 0 -static inline void mem_cgroup_sk_alloc(struct sock *sk) { }; -static inline void mem_cgroup_sk_free(struct sock *sk) { }; -static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) + +static inline void mem_cgroup_sk_alloc(struct sock *sk) +{ +} + +static inline void mem_cgroup_sk_free(struct sock *sk) +{ +} + +static inline void mem_cgroup_sk_inherit(const struct sock *sk, struct sock *newsk) +{ +} + +static inline bool mem_cgroup_sk_charge(const struct sock *sk, + unsigned int nr_pages, + gfp_t gfp_mask) { return false; } +static inline void mem_cgroup_sk_uncharge(const struct sock *sk, + unsigned int nr_pages) +{ +} + static inline void set_shrinker_bit(struct mem_cgroup *memcg, int nid, int shrinker_id) { } + +static inline int shrinker_id(struct shrinker *shrinker) +{ + return -1; +} #endif -#ifdef CONFIG_MEMCG_KMEM +#ifdef CONFIG_MEMCG bool mem_cgroup_kmem_disabled(void); int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, int order); void __memcg_kmem_uncharge_page(struct page *page, int order); -struct obj_cgroup *get_obj_cgroup_from_current(void); -struct obj_cgroup *get_obj_cgroup_from_page(struct page *page); +/* + * The returned objcg pointer is safe to use without additional + * protection within a scope. The scope is defined either by + * the current task (similar to the "current" global variable) + * or by set_active_memcg() pair. + * Please, use obj_cgroup_get() to get a reference if the pointer + * needs to be used outside of the local scope. + */ +struct obj_cgroup *current_obj_cgroup(void); +struct obj_cgroup *get_obj_cgroup_from_folio(struct folio *folio); + +static inline struct obj_cgroup *get_obj_cgroup_from_current(void) +{ + struct obj_cgroup *objcg = current_obj_cgroup(); + + if (objcg) + obj_cgroup_get(objcg); + + return objcg; +} int obj_cgroup_charge(struct obj_cgroup *objcg, gfp_t gfp, size_t size); void obj_cgroup_uncharge(struct obj_cgroup *objcg, size_t size); -extern struct static_key_false memcg_kmem_enabled_key; +extern struct static_key_false memcg_bpf_enabled_key; +static inline bool memcg_bpf_enabled(void) +{ + return static_branch_likely(&memcg_bpf_enabled_key); +} + +extern struct static_key_false memcg_kmem_online_key; -static inline bool memcg_kmem_enabled(void) +static inline bool memcg_kmem_online(void) { - return static_branch_likely(&memcg_kmem_enabled_key); + return static_branch_likely(&memcg_kmem_online_key); } static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, int order) { - if (memcg_kmem_enabled()) + if (memcg_kmem_online()) return __memcg_kmem_charge_page(page, gfp, order); return 0; } static inline void memcg_kmem_uncharge_page(struct page *page, int order) { - if (memcg_kmem_enabled()) + if (memcg_kmem_online()) __memcg_kmem_uncharge_page(page, order); } @@ -1781,23 +1727,32 @@ static inline int memcg_kmem_id(struct mem_cgroup *memcg) return memcg ? memcg->kmemcg_id : -1; } -struct mem_cgroup *mem_cgroup_from_obj(void *p); struct mem_cgroup *mem_cgroup_from_slab_obj(void *p); -static inline void count_objcg_event(struct obj_cgroup *objcg, - enum vm_event_item idx) +static inline void count_objcg_events(struct obj_cgroup *objcg, + enum vm_event_item idx, + unsigned long count) { struct mem_cgroup *memcg; - if (!memcg_kmem_enabled()) + if (!memcg_kmem_online()) return; rcu_read_lock(); memcg = obj_cgroup_memcg(objcg); - count_memcg_events(memcg, idx, 1); + count_memcg_events(memcg, idx, count); rcu_read_unlock(); } +bool mem_cgroup_node_allowed(struct mem_cgroup *memcg, int nid); + +void mem_cgroup_show_protected_memory(struct mem_cgroup *memcg); + +static inline bool memcg_is_dying(struct mem_cgroup *memcg) +{ + return memcg ? css_is_dying(&memcg->css) : false; +} + #else static inline bool mem_cgroup_kmem_disabled(void) { @@ -1824,12 +1779,17 @@ static inline void __memcg_kmem_uncharge_page(struct page *page, int order) { } -static inline struct obj_cgroup *get_obj_cgroup_from_page(struct page *page) +static inline struct obj_cgroup *get_obj_cgroup_from_folio(struct folio *folio) { return NULL; } -static inline bool memcg_kmem_enabled(void) +static inline bool memcg_bpf_enabled(void) +{ + return false; +} + +static inline bool memcg_kmem_online(void) { return false; } @@ -1839,27 +1799,42 @@ static inline int memcg_kmem_id(struct mem_cgroup *memcg) return -1; } -static inline struct mem_cgroup *mem_cgroup_from_obj(void *p) +static inline struct mem_cgroup *mem_cgroup_from_slab_obj(void *p) { return NULL; } -static inline struct mem_cgroup *mem_cgroup_from_slab_obj(void *p) +static inline void count_objcg_events(struct obj_cgroup *objcg, + enum vm_event_item idx, + unsigned long count) { - return NULL; } -static inline void count_objcg_event(struct obj_cgroup *objcg, - enum vm_event_item idx) +static inline ino_t page_cgroup_ino(struct page *page) { + return 0; } -#endif /* CONFIG_MEMCG_KMEM */ +static inline bool mem_cgroup_node_allowed(struct mem_cgroup *memcg, int nid) +{ + return true; +} + +static inline void mem_cgroup_show_protected_memory(struct mem_cgroup *memcg) +{ +} + +static inline bool memcg_is_dying(struct mem_cgroup *memcg) +{ + return false; +} +#endif /* CONFIG_MEMCG */ -#if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_ZSWAP) +#if defined(CONFIG_MEMCG) && defined(CONFIG_ZSWAP) bool obj_cgroup_may_zswap(struct obj_cgroup *objcg); void obj_cgroup_charge_zswap(struct obj_cgroup *objcg, size_t size); void obj_cgroup_uncharge_zswap(struct obj_cgroup *objcg, size_t size); +bool mem_cgroup_zswap_writeback_enabled(struct mem_cgroup *memcg); #else static inline bool obj_cgroup_may_zswap(struct obj_cgroup *objcg) { @@ -1873,6 +1848,78 @@ static inline void obj_cgroup_uncharge_zswap(struct obj_cgroup *objcg, size_t size) { } +static inline bool mem_cgroup_zswap_writeback_enabled(struct mem_cgroup *memcg) +{ + /* if zswap is disabled, do not block pages going to the swapping device */ + return true; +} #endif + +/* Cgroup v1-related declarations */ + +#ifdef CONFIG_MEMCG_V1 +unsigned long memcg1_soft_limit_reclaim(pg_data_t *pgdat, int order, + gfp_t gfp_mask, + unsigned long *total_scanned); + +bool mem_cgroup_oom_synchronize(bool wait); + +static inline bool task_in_memcg_oom(struct task_struct *p) +{ + return p->memcg_in_oom; +} + +static inline void mem_cgroup_enter_user_fault(void) +{ + WARN_ON(current->in_user_fault); + current->in_user_fault = 1; +} + +static inline void mem_cgroup_exit_user_fault(void) +{ + WARN_ON(!current->in_user_fault); + current->in_user_fault = 0; +} + +void memcg1_swapout(struct folio *folio, swp_entry_t entry); +void memcg1_swapin(swp_entry_t entry, unsigned int nr_pages); + +#else /* CONFIG_MEMCG_V1 */ +static inline +unsigned long memcg1_soft_limit_reclaim(pg_data_t *pgdat, int order, + gfp_t gfp_mask, + unsigned long *total_scanned) +{ + return 0; +} + +static inline bool task_in_memcg_oom(struct task_struct *p) +{ + return false; +} + +static inline bool mem_cgroup_oom_synchronize(bool wait) +{ + return false; +} + +static inline void mem_cgroup_enter_user_fault(void) +{ +} + +static inline void mem_cgroup_exit_user_fault(void) +{ +} + +static inline void memcg1_swapout(struct folio *folio, swp_entry_t entry) +{ +} + +static inline void memcg1_swapin(swp_entry_t entry, unsigned int nr_pages) +{ +} + +#endif /* CONFIG_MEMCG_V1 */ + #endif /* _LINUX_MEMCONTROL_H */ |