diff options
Diffstat (limited to 'include/linux/memcontrol.h')
| -rw-r--r-- | include/linux/memcontrol.h | 1890 |
1 files changed, 1231 insertions, 659 deletions
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 83ae11cbd12c..0651865a4564 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ /* memcontrol.h - Memory Controller * * Copyright IBM Corporation, 2007 @@ -5,16 +6,6 @@ * * Copyright 2007 OpenVZ SWsoft Inc * Author: Pavel Emelianov <xemul@openvz.org> - * - * 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 - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. */ #ifndef _LINUX_MEMCONTROL_H @@ -23,6 +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> @@ -30,21 +22,23 @@ #include <linux/vmstat.h> #include <linux/writeback.h> #include <linux/page-flags.h> +#include <linux/shrinker.h> struct mem_cgroup; +struct obj_cgroup; struct page; struct mm_struct; struct kmem_cache; /* Cgroup-specific page state, on top of universal node page state */ enum memcg_stat_item { - MEMCG_CACHE = NR_VM_NODE_STAT_ITEMS, - MEMCG_RSS, - MEMCG_RSS_HUGE, - MEMCG_SWAP, + MEMCG_SWAP = NR_VM_NODE_STAT_ITEMS, MEMCG_SOCK, - /* XXX: why are these zone and not node counters? */ - MEMCG_KERNEL_STACK_KB, + MEMCG_PERCPU_B, + MEMCG_VMALLOC, + MEMCG_KMEM, + MEMCG_ZSWAP_B, + MEMCG_ZSWAPPED, MEMCG_NR_STAT, }; @@ -54,97 +48,78 @@ enum memcg_memory_event { MEMCG_MAX, MEMCG_OOM, MEMCG_OOM_KILL, + MEMCG_OOM_GROUP_KILL, + MEMCG_SWAP_HIGH, MEMCG_SWAP_MAX, MEMCG_SWAP_FAIL, + MEMCG_SOCK_THROTTLED, MEMCG_NR_MEMORY_EVENTS, }; -enum mem_cgroup_protection { - MEMCG_PROT_NONE, - MEMCG_PROT_LOW, - MEMCG_PROT_MIN, -}; - struct mem_cgroup_reclaim_cookie { pg_data_t *pgdat; - int priority; - 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 incremated by the number of pages. This counter is used for - * for 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_TARGET_NUMAINFO, - MEM_CGROUP_NTARGETS, -}; - -struct mem_cgroup_stat_cpu { - long count[MEMCG_NR_STAT]; - unsigned long events[NR_VM_EVENT_ITEMS]; - unsigned long nr_page_events; - unsigned long targets[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; -}; - -struct lruvec_stat { - long count[NR_VM_NODE_STAT_ITEMS]; + atomic_t generation; }; /* - * Bitmap of shrinker::id corresponding to memcg-aware shrinkers, - * which have elements charged to this memcg. - */ -struct memcg_shrinker_map { - struct rcu_head rcu; - unsigned long map[0]; -}; - -/* - * per-zone information in memory controller. + * per-node information in memory controller. */ struct mem_cgroup_per_node { - struct lruvec lruvec; - - struct lruvec_stat __percpu *lruvec_stat_cpu; - atomic_long_t lruvec_stat[NR_VM_NODE_STAT_ITEMS]; + /* Keep the read-only fields at the start */ + struct mem_cgroup *memcg; /* Back pointer, we cannot */ + /* use container_of */ - unsigned long lru_zone_size[MAX_NR_ZONES][NR_LRU_LISTS]; + struct lruvec_stats_percpu __percpu *lruvec_stats_percpu; + struct lruvec_stats *lruvec_stats; + struct shrinker_info __rcu *shrinker_info; - struct mem_cgroup_reclaim_iter iter[DEF_PRIORITY + 1]; +#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. + */ -#ifdef CONFIG_MEMCG_KMEM - struct memcg_shrinker_map __rcu *shrinker_map; -#endif 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; - bool congested; /* memcg has many dirty pages */ - /* backed by a congested BDI */ +#else + CACHELINE_PADDING(_pad1_); +#endif - struct mem_cgroup *memcg; /* Back pointer, we cannot */ - /* use container_of */ + /* 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 { @@ -159,7 +134,7 @@ struct mem_cgroup_threshold_ary { /* Size of entries[] */ unsigned int size; /* Array of thresholds */ - struct mem_cgroup_threshold entries[0]; + struct mem_cgroup_threshold entries[] __counted_by(size); }; struct mem_cgroup_thresholds { @@ -173,20 +148,38 @@ struct mem_cgroup_thresholds { struct mem_cgroup_threshold_ary *spare; }; -enum memcg_kmem_state { - KMEM_NONE, - KMEM_ALLOCATED, - KMEM_ONLINE, +/* + * Remember four most recent foreign writebacks with dirty pages in this + * cgroup. Inode sharing is expected to be uncommon and, even if we miss + * one in a given round, we're likely to catch it later if it keeps + * foreign-dirtying, so a fairly low count should be enough. + * + * See mem_cgroup_track_foreign_dirty_slowpath() for details. + */ +#define MEMCG_CGWB_FRN_CNT 4 + +struct memcg_cgwb_frn { + u64 bdi_id; /* bdi->id of the foreign inode */ + int memcg_id; /* memcg->css.id of foreign inode */ + u64 at; /* jiffies_64 at the time of dirtying */ + struct wb_completion done; /* tracks in-flight foreign writebacks */ }; -#if defined(CONFIG_SMP) -struct memcg_padding { - char x[0]; -} ____cacheline_internodealigned_in_smp; -#define MEMCG_PADDING(name) struct memcg_padding name; -#else -#define MEMCG_PADDING(name) -#endif +/* + * Bucket for arbitrarily byte-sized objects charged to a memory + * cgroup. The bucket can be reparented in one piece when the cgroup + * is destroyed, without having to round up the individual references + * of all live memory objects in the wild. + */ +struct obj_cgroup { + struct percpu_ref refcnt; + struct mem_cgroup *memcg; + atomic_t nr_charged_bytes; + union { + struct list_head list; /* protected by objcg_lock */ + struct rcu_head rcu; + }; +}; /* * The memory controller data structure. The memory controller controls both @@ -201,49 +194,112 @@ struct mem_cgroup { struct mem_cgroup_id id; /* Accounted resources */ - struct page_counter memory; - struct page_counter swap; + struct page_counter memory; /* Both v1 & v2 */ - /* Legacy consumer-oriented counters */ - struct page_counter memsw; - struct page_counter kmem; - struct page_counter tcpmem; + union { + struct page_counter swap; /* v2 only */ + struct page_counter memsw; /* v1 only */ + }; - /* Upper bound of normal memory consumption range */ - unsigned long high; + /* 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; - unsigned long soft_limit; - - /* vmpressure notifications */ - struct vmpressure vmpressure; +#ifdef CONFIG_ZSWAP + unsigned long zswap_max; /* - * Should the accounting and control be hierarchical, per subtree? + * Prevent pages from this memcg from being written back from zswap to + * swap, and from being swapped out on zswap store failures. */ - bool use_hierarchy; + bool zswap_writeback; +#endif + + /* vmpressure notifications */ + struct vmpressure vmpressure; /* * Should the OOM killer kill all belonging tasks, had it kill one? */ 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 */ + /* memory.events and memory.events.local */ struct cgroup_file events_file; + struct cgroup_file events_local_file; /* handle for "memory.swap.events" */ struct cgroup_file swap_events_file; + /* memory.stat */ + struct memcg_vmstats *vmstats; + + /* memory.events */ + atomic_long_t memory_events[MEMCG_NR_MEMORY_EVENTS]; + atomic_long_t memory_events_local[MEMCG_NR_MEMORY_EVENTS]; + +#ifdef CONFIG_MEMCG_NMI_SAFETY_REQUIRES_ATOMIC + /* MEMCG_KMEM for nmi context */ + atomic_t kmem_stat; +#endif + /* + * 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. + */ + 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; + +#ifdef CONFIG_CGROUP_WRITEBACK + struct list_head cgwb_list; + struct wb_domain cgwb_domain; + struct memcg_cgwb_frn cgwb_frn[MEMCG_CGWB_FRN_CNT]; +#endif + +#ifdef CONFIG_TRANSPARENT_HUGEPAGE + struct deferred_split deferred_split_queue; +#endif + +#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; @@ -256,72 +312,237 @@ struct mem_cgroup { /* 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; + /* 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[]; +}; + +/* + * size of first charge trial. + * TODO: maybe necessary to use big numbers in big irons or dynamic based of the + * workload. + */ +#define MEMCG_CHARGE_BATCH 64U + +extern struct mem_cgroup *root_mem_cgroup; + +enum page_memcg_data_flags { + /* 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), +}; - MEMCG_PADDING(_pad1_); +#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 { /* - * set > 0 if pages under this cgroup are moving to other cgroup. + * 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. */ - atomic_t moving_account; - struct task_struct *move_lock_task; + 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), +}; - /* memory.stat */ - struct mem_cgroup_stat_cpu __percpu *stat_cpu; +#define OBJEXTS_FLAGS_MASK (__NR_OBJEXTS_FLAGS - 1) - MEMCG_PADDING(_pad2_); +#ifdef CONFIG_MEMCG - atomic_long_t stat[MEMCG_NR_STAT]; - atomic_long_t events[NR_VM_EVENT_ITEMS]; - atomic_long_t memory_events[MEMCG_NR_MEMORY_EVENTS]; +static inline bool folio_memcg_kmem(struct folio *folio); - unsigned long socket_pressure; +/* + * 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. + */ +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); +} - /* Legacy tcp memory accounting */ - bool tcpmem_active; - int tcpmem_pressure; +/* + * __folio_memcg - Get the memory cgroup associated with a non-kmem folio + * @folio: Pointer to the folio. + * + * Returns a pointer to the memory cgroup associated with the folio, + * or NULL. 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 or + * kmem folios. + */ +static inline struct mem_cgroup *__folio_memcg(struct folio *folio) +{ + unsigned long memcg_data = folio->memcg_data; -#ifdef CONFIG_MEMCG_KMEM - /* Index in the kmem_cache->memcg_params.memcg_caches array */ - int kmemcg_id; - enum memcg_kmem_state kmem_state; - struct list_head kmem_caches; -#endif + VM_BUG_ON_FOLIO(folio_test_slab(folio), folio); + VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_OBJEXTS, folio); + VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_KMEM, folio); - int last_scanned_node; -#if MAX_NUMNODES > 1 - nodemask_t scan_nodes; - atomic_t numainfo_events; - atomic_t numainfo_updating; -#endif + return (struct mem_cgroup *)(memcg_data & ~OBJEXTS_FLAGS_MASK); +} -#ifdef CONFIG_CGROUP_WRITEBACK - struct list_head cgwb_list; - struct wb_domain cgwb_domain; -#endif +/* + * __folio_objcg - get the object cgroup associated with a kmem folio. + * @folio: Pointer to the folio. + * + * Returns a pointer to the object cgroup associated with the folio, + * or NULL. This function assumes that the folio is known to have a + * proper object cgroup pointer. It's not safe to call this function + * against some type of folios, e.g. slab folios or ex-slab folios or + * LRU folios. + */ +static inline struct obj_cgroup *__folio_objcg(struct folio *folio) +{ + unsigned long memcg_data = folio->memcg_data; - /* List of events which userspace want to receive */ - struct list_head event_list; - spinlock_t event_list_lock; + VM_BUG_ON_FOLIO(folio_test_slab(folio), folio); + VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_OBJEXTS, folio); + VM_BUG_ON_FOLIO(!(memcg_data & MEMCG_DATA_KMEM), folio); - struct mem_cgroup_per_node *nodeinfo[0]; - /* WARNING: nodeinfo must be the last member here */ -}; + return (struct obj_cgroup *)(memcg_data & ~OBJEXTS_FLAGS_MASK); +} /* - * size of first charge trial. "32" comes from vmscan.c's magic value. - * TODO: maybe necessary to use big numbers in big irons. + * folio_memcg - Get the memory cgroup associated with a folio. + * @folio: Pointer to the folio. + * + * Returns a pointer to the memory cgroup associated with the folio, + * or NULL. 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. + * + * For a non-kmem folio any of the following ensures folio and memcg binding + * stability: + * + * - the folio lock + * - LRU isolation + * - exclusive reference + * + * For a kmem folio a caller should hold an rcu read lock to protect memcg + * associated with a kmem folio from being released. */ -#define MEMCG_CHARGE_BATCH 32U +static inline struct mem_cgroup *folio_memcg(struct folio *folio) +{ + if (folio_memcg_kmem(folio)) + return obj_cgroup_memcg(__folio_objcg(folio)); + return __folio_memcg(folio); +} -extern struct mem_cgroup *root_mem_cgroup; +/* + * folio_memcg_charged - If a folio is charged to a memory cgroup. + * @folio: Pointer to the folio. + * + * Returns true if folio is charged to a memory cgroup, otherwise returns false. + */ +static inline bool folio_memcg_charged(struct folio *folio) +{ + return folio->memcg_data != 0; +} + +/* + * 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 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 folio any of the following ensures folio and memcg binding + * stability: + * + * - the folio lock + * - LRU isolation + * - exclusive reference + * + * 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 *folio_memcg_check(struct folio *folio) +{ + /* + * Because folio->memcg_data might be changed asynchronously + * for slabs, READ_ONCE() should be used here. + */ + unsigned long memcg_data = READ_ONCE(folio->memcg_data); + + if (memcg_data & MEMCG_DATA_OBJEXTS) + return NULL; + + if (memcg_data & MEMCG_DATA_KMEM) { + struct obj_cgroup *objcg; + + objcg = (void *)(memcg_data & ~OBJEXTS_FLAGS_MASK); + return obj_cgroup_memcg(objcg); + } + + 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) +{ + struct mem_cgroup *memcg; + + rcu_read_lock(); +retry: + memcg = obj_cgroup_memcg(objcg); + if (unlikely(!css_tryget(&memcg->css))) + goto retry; + rcu_read_unlock(); + + return memcg; +} + +/* + * folio_memcg_kmem - Check if the folio has the memcg_kmem flag set. + * @folio: Pointer to the folio. + * + * Checks if the folio has MemcgKmem flag set. The caller must ensure + * that the folio has an associated memory cgroup. It's not safe to call + * this function against some types of folios, e.g. slab folios. + */ +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_OBJEXTS, folio); + return folio->memcg_data & MEMCG_DATA_KMEM; +} + +static inline bool PageMemcgKmem(struct page *page) +{ + return folio_memcg_kmem(page_folio(page)); +} static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) { @@ -333,51 +554,170 @@ static inline bool mem_cgroup_disabled(void) return !cgroup_subsys_enabled(memory_cgrp_subsys); } -enum mem_cgroup_protection mem_cgroup_protected(struct mem_cgroup *root, - struct mem_cgroup *memcg); +static inline void mem_cgroup_protection(struct mem_cgroup *root, + struct mem_cgroup *memcg, + unsigned long *min, + unsigned long *low) +{ + *min = *low = 0; + + if (mem_cgroup_disabled()) + return; + + /* + * There is no reclaim protection applied to a targeted reclaim. + * We are special casing this specific case here because + * 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) + * which would want to have effective values 0 for targeted reclaim + * but a different value for external reclaim. + * + * Example + * Let's have global and A's reclaim in parallel: + * | + * A (low=2G, usage = 3G, max = 3G, children_low_usage = 1.5G) + * |\ + * | C (low = 1G, usage = 2.5G) + * B (low = 1G, usage = 0.5G) + * + * For the global reclaim + * A.elow = A.low + * B.elow = min(B.usage, B.low) because children_low_usage <= A.elow + * C.elow = min(C.usage, C.low) + * + * With the effective values resetting we have A reclaim + * A.elow = 0 + * B.elow = B.low + * C.elow = C.low + * + * If the global reclaim races with A's reclaim then + * B.elow = C.elow = 0 because children_low_usage > A.elow) + * is possible and reclaiming B would be violating the protection. + * + */ + if (root == memcg) + return; -int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, - gfp_t gfp_mask, struct mem_cgroup **memcgp, - bool compound); -int mem_cgroup_try_charge_delay(struct page *page, struct mm_struct *mm, - gfp_t gfp_mask, struct mem_cgroup **memcgp, - bool compound); -void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg, - bool lrucare, bool compound); -void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg, - bool compound); -void mem_cgroup_uncharge(struct page *page); -void mem_cgroup_uncharge_list(struct list_head *page_list); + *min = READ_ONCE(memcg->memory.emin); + *low = READ_ONCE(memcg->memory.elow); +} -void mem_cgroup_migrate(struct page *oldpage, struct page *newpage); +void mem_cgroup_calculate_protection(struct mem_cgroup *root, + struct mem_cgroup *memcg); -static struct mem_cgroup_per_node * -mem_cgroup_nodeinfo(struct mem_cgroup *memcg, int nid) +static inline bool mem_cgroup_unprotected(struct mem_cgroup *target, + struct mem_cgroup *memcg) { - return memcg->nodeinfo[nid]; + /* + * The root memcg doesn't account charges, and doesn't support + * protection. The target memcg's protection is ignored, see + * mem_cgroup_calculate_protection() and mem_cgroup_protection() + */ + return mem_cgroup_disabled() || mem_cgroup_is_root(memcg) || + memcg == target; +} + +static inline bool mem_cgroup_below_low(struct mem_cgroup *target, + struct mem_cgroup *memcg) +{ + if (mem_cgroup_unprotected(target, memcg)) + return false; + + return READ_ONCE(memcg->memory.elow) >= + page_counter_read(&memcg->memory); +} + +static inline bool mem_cgroup_below_min(struct mem_cgroup *target, + struct mem_cgroup *memcg) +{ + if (mem_cgroup_unprotected(target, memcg)) + return false; + + return READ_ONCE(memcg->memory.emin) >= + page_counter_read(&memcg->memory); +} + +int __mem_cgroup_charge(struct folio *folio, struct mm_struct *mm, gfp_t gfp); + +/** + * mem_cgroup_charge - Charge a newly allocated folio to a cgroup. + * @folio: Folio to charge. + * @mm: mm context of the allocating task. + * @gfp: Reclaim mode. + * + * Try to charge @folio to the memcg that @mm belongs to, reclaiming + * pages according to @gfp if necessary. If @mm is NULL, try to + * charge to the active memcg. + * + * Do not use this for folios allocated for swapin. + * + * Return: 0 on success. Otherwise, an error code is returned. + */ +static inline int mem_cgroup_charge(struct folio *folio, struct mm_struct *mm, + gfp_t gfp) +{ + if (mem_cgroup_disabled()) + return 0; + 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_uncharge(struct folio *folio); + +/** + * mem_cgroup_uncharge - Uncharge a folio. + * @folio: Folio to uncharge. + * + * Uncharge a folio previously charged with mem_cgroup_charge(). + */ +static inline void mem_cgroup_uncharge(struct folio *folio) +{ + if (mem_cgroup_disabled()) + return; + __mem_cgroup_uncharge(folio); +} + +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_folios(folios); } +void mem_cgroup_replace_folio(struct folio *old, struct folio *new); +void mem_cgroup_migrate(struct folio *old, struct folio *new); + /** - * mem_cgroup_lruvec - get the lru list vector for a node or a memcg zone - * @node: node of the wanted lruvec + * mem_cgroup_lruvec - get the lru list vector for a memcg & node * @memcg: memcg of the wanted lruvec + * @pgdat: pglist_data * - * Returns the lru list vector holding pages for a given @node or a given - * @memcg and @zone. This can be the node lruvec, if the memory controller - * is disabled. + * Returns the lru list vector holding pages for a given @memcg & + * @pgdat combination. This can be the node lruvec, if the memory + * controller is disabled. */ -static inline struct lruvec *mem_cgroup_lruvec(struct pglist_data *pgdat, - struct mem_cgroup *memcg) +static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg, + struct pglist_data *pgdat) { struct mem_cgroup_per_node *mz; struct lruvec *lruvec; if (mem_cgroup_disabled()) { - lruvec = node_lruvec(pgdat); + lruvec = &pgdat->__lruvec; goto out; } - mz = mem_cgroup_nodeinfo(memcg, pgdat->node_id); + if (!memcg) + memcg = root_mem_cgroup; + + mz = memcg->nodeinfo[pgdat->node_id]; lruvec = &mz->lruvec; out: /* @@ -390,20 +730,79 @@ out: return lruvec; } -struct lruvec *mem_cgroup_page_lruvec(struct page *, struct pglist_data *); +/** + * folio_lruvec - return lruvec for isolating/putting an LRU folio + * @folio: Pointer to the folio. + * + * This function relies on folio->mem_cgroup being stable. + */ +static inline struct lruvec *folio_lruvec(struct folio *folio) +{ + struct mem_cgroup *memcg = folio_memcg(folio); + + VM_WARN_ON_ONCE_FOLIO(!memcg && !mem_cgroup_disabled(), folio); + return mem_cgroup_lruvec(memcg, folio_pgdat(folio)); +} -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); -struct mem_cgroup *get_mem_cgroup_from_page(struct page *page); +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, + unsigned long *flags); + +#ifdef CONFIG_DEBUG_VM +void lruvec_memcg_debug(struct lruvec *lruvec, struct folio *folio); +#else +static inline +void lruvec_memcg_debug(struct lruvec *lruvec, struct folio *folio) +{ +} +#endif static inline struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){ return css ? container_of(css, struct mem_cgroup, css) : NULL; } +static inline bool obj_cgroup_tryget(struct obj_cgroup *objcg) +{ + return percpu_ref_tryget(&objcg->refcnt); +} + +static inline void obj_cgroup_get(struct obj_cgroup *objcg) +{ + percpu_ref_get(&objcg->refcnt); +} + +static inline void obj_cgroup_get_many(struct obj_cgroup *objcg, + unsigned long nr) +{ + percpu_ref_get_many(&objcg->refcnt, nr); +} + +static inline void obj_cgroup_put(struct obj_cgroup *objcg) +{ + 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) { if (memcg) @@ -417,8 +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) { @@ -429,6 +828,20 @@ static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) } struct mem_cgroup *mem_cgroup_from_id(unsigned short id); +#ifdef CONFIG_SHRINKER_DEBUG +static inline unsigned long mem_cgroup_ino(struct mem_cgroup *memcg) +{ + return memcg ? cgroup_ino(memcg->css.cgroup) : 0; +} + +struct mem_cgroup *mem_cgroup_get_from_ino(unsigned long ino); +#endif + +static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) +{ + return mem_cgroup_from_css(seq_css(m)); +} + static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) { struct mem_cgroup_per_node *mz; @@ -444,14 +857,11 @@ 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) { - if (!memcg->memory.parent) - return NULL; - return mem_cgroup_from_counter(memcg->memory.parent, memory); + return mem_cgroup_from_css(memcg->css.parent); } static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, @@ -459,8 +869,6 @@ static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, { if (root == memcg) return true; - if (!root->use_hierarchy) - return false; return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup); } @@ -478,7 +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) @@ -488,30 +896,9 @@ static inline bool mem_cgroup_online(struct mem_cgroup *memcg) return !!(memcg->css.flags & CSS_ONLINE); } -/* - * For memory reclaim. - */ -int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); - void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, int zid, 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) -{ - struct mem_cgroup_per_node *mz; - unsigned long nr_pages = 0; - int zid; - - mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); - for (zid = 0; zid < MAX_NR_ZONES; zid++) - nr_pages += mz->lru_zone_size[zid][lru]; - return nr_pages; -} - static inline unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, enum lru_list lru, int zone_idx) @@ -519,285 +906,178 @@ unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, struct mem_cgroup_per_node *mz; mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); - return mz->lru_zone_size[zone_idx][lru]; + 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); +unsigned long mem_cgroup_size(struct mem_cgroup *memcg); + void mem_cgroup_print_oom_context(struct mem_cgroup *memcg, struct task_struct *p); 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); -#ifdef CONFIG_MEMCG_SWAP -extern int do_swap_account; -#endif - -struct mem_cgroup *lock_page_memcg(struct page *page); -void __unlock_page_memcg(struct mem_cgroup *memcg); -void unlock_page_memcg(struct page *page); - /* idx can be of type enum memcg_stat_item or node_stat_item */ -static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, - int idx) -{ - long x = atomic_long_read(&memcg->stat[idx]); -#ifdef CONFIG_SMP - if (x < 0) - x = 0; -#endif - return x; -} +void mod_memcg_state(struct mem_cgroup *memcg, + enum memcg_stat_item idx, int val); -/* 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) +static inline void mod_memcg_page_state(struct page *page, + enum memcg_stat_item idx, int val) { - long x; + struct mem_cgroup *memcg; if (mem_cgroup_disabled()) return; - x = val + __this_cpu_read(memcg->stat_cpu->count[idx]); - if (unlikely(abs(x) > MEMCG_CHARGE_BATCH)) { - atomic_long_add(x, &memcg->stat[idx]); - x = 0; - } - __this_cpu_write(memcg->stat_cpu->count[idx], x); + rcu_read_lock(); + memcg = folio_memcg(page_folio(page)); + if (memcg) + mod_memcg_state(memcg, idx, val); + 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; +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); - local_irq_save(flags); - __mod_memcg_state(memcg, idx, val); - local_irq_restore(flags); -} +void mem_cgroup_flush_stats(struct mem_cgroup *memcg); +void mem_cgroup_flush_stats_ratelimited(struct mem_cgroup *memcg); -/** - * mod_memcg_page_state - update page state statistics - * @page: the page - * @idx: page state item to account - * @val: number of pages (positive or negative) - * - * 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)) - * mod_memcg_page_state(page, state, -1); - * unlock_page(page) or unlock_page_memcg(page) - * - * Kernel pages are an exception to this, since they'll never move. - */ -static inline void __mod_memcg_page_state(struct page *page, - int idx, int val) -{ - if (page->mem_cgroup) - __mod_memcg_state(page->mem_cgroup, idx, val); -} +void mod_lruvec_kmem_state(void *p, enum node_stat_item idx, int val); -static inline void mod_memcg_page_state(struct page *page, - int idx, int val) -{ - if (page->mem_cgroup) - mod_memcg_state(page->mem_cgroup, idx, val); -} +void count_memcg_events(struct mem_cgroup *memcg, enum vm_event_item idx, + unsigned long count); -static inline unsigned long lruvec_page_state(struct lruvec *lruvec, - enum node_stat_item idx) +static inline void count_memcg_folio_events(struct folio *folio, + enum vm_event_item idx, unsigned long nr) { - struct mem_cgroup_per_node *pn; - long x; + struct mem_cgroup *memcg = folio_memcg(folio); - if (mem_cgroup_disabled()) - return node_page_state(lruvec_pgdat(lruvec), idx); - - pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); - x = atomic_long_read(&pn->lruvec_stat[idx]); -#ifdef CONFIG_SMP - if (x < 0) - x = 0; -#endif - return x; + if (memcg) + count_memcg_events(memcg, idx, nr); } -static inline void __mod_lruvec_state(struct lruvec *lruvec, - enum node_stat_item idx, int val) +static inline void count_memcg_events_mm(struct mm_struct *mm, + enum vm_event_item idx, unsigned long count) { - struct mem_cgroup_per_node *pn; - long x; - - /* Update node */ - __mod_node_page_state(lruvec_pgdat(lruvec), idx, val); + struct mem_cgroup *memcg; if (mem_cgroup_disabled()) return; - pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); - - /* Update memcg */ - __mod_memcg_state(pn->memcg, idx, val); - - /* Update lruvec */ - x = val + __this_cpu_read(pn->lruvec_stat_cpu->count[idx]); - if (unlikely(abs(x) > MEMCG_CHARGE_BATCH)) { - atomic_long_add(x, &pn->lruvec_stat[idx]); - x = 0; - } - __this_cpu_write(pn->lruvec_stat_cpu->count[idx], x); + rcu_read_lock(); + memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); + if (likely(memcg)) + count_memcg_events(memcg, idx, count); + rcu_read_unlock(); } -static inline void mod_lruvec_state(struct lruvec *lruvec, - enum node_stat_item idx, int val) +static inline void count_memcg_event_mm(struct mm_struct *mm, + enum vm_event_item idx) { - unsigned long flags; - - local_irq_save(flags); - __mod_lruvec_state(lruvec, idx, val); - local_irq_restore(flags); + count_memcg_events_mm(mm, idx, 1); } -static inline void __mod_lruvec_page_state(struct page *page, - enum node_stat_item idx, int val) -{ - pg_data_t *pgdat = page_pgdat(page); - struct lruvec *lruvec; - - /* Untracked pages have no memcg, no lruvec. Update only the node */ - if (!page->mem_cgroup) { - __mod_node_page_state(pgdat, idx, val); - return; - } - - lruvec = mem_cgroup_lruvec(pgdat, page->mem_cgroup); - __mod_lruvec_state(lruvec, idx, val); -} +void __memcg_memory_event(struct mem_cgroup *memcg, + enum memcg_memory_event event, bool allow_spinning); -static inline void mod_lruvec_page_state(struct page *page, - enum node_stat_item idx, int val) +static inline void memcg_memory_event(struct mem_cgroup *memcg, + enum memcg_memory_event event) { - unsigned long flags; - - local_irq_save(flags); - __mod_lruvec_page_state(page, idx, val); - local_irq_restore(flags); + __memcg_memory_event(memcg, event, true); } -unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, - gfp_t gfp_mask, - unsigned long *total_scanned); - -static inline void __count_memcg_events(struct mem_cgroup *memcg, - enum vm_event_item idx, - unsigned long count) +static inline void memcg_memory_event_mm(struct mm_struct *mm, + enum memcg_memory_event event) { - unsigned long x; + struct mem_cgroup *memcg; if (mem_cgroup_disabled()) return; - x = count + __this_cpu_read(memcg->stat_cpu->events[idx]); - if (unlikely(x > MEMCG_CHARGE_BATCH)) { - atomic_long_add(x, &memcg->events[idx]); - x = 0; - } - __this_cpu_write(memcg->stat_cpu->events[idx], x); -} - -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); + rcu_read_lock(); + memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); + if (likely(memcg)) + memcg_memory_event(memcg, event); + rcu_read_unlock(); } -static inline void count_memcg_page_event(struct page *page, - enum vm_event_item idx) -{ - if (page->mem_cgroup) - count_memcg_events(page->mem_cgroup, idx, 1); -} +void split_page_memcg(struct page *first, unsigned order); +void folio_split_memcg_refs(struct folio *folio, unsigned old_order, + unsigned new_order); -static inline void count_memcg_event_mm(struct mm_struct *mm, - enum vm_event_item idx) +static inline u64 cgroup_id_from_mm(struct mm_struct *mm) { struct mem_cgroup *memcg; + u64 id; if (mem_cgroup_disabled()) - return; + return 0; rcu_read_lock(); memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); - if (likely(memcg)) - count_memcg_events(memcg, idx, 1); + if (!memcg) + memcg = root_mem_cgroup; + id = cgroup_id(memcg->css.cgroup); rcu_read_unlock(); + return id; } -static inline void memcg_memory_event(struct mem_cgroup *memcg, - enum memcg_memory_event event) +extern int mem_cgroup_init(void); +#else /* CONFIG_MEMCG */ + +#define MEM_CGROUP_ID_SHIFT 0 + +#define root_mem_cgroup (NULL) + +static inline struct mem_cgroup *folio_memcg(struct folio *folio) { - atomic_long_inc(&memcg->memory_events[event]); - cgroup_file_notify(&memcg->events_file); + return NULL; } -static inline void memcg_memory_event_mm(struct mm_struct *mm, - enum memcg_memory_event event) +static inline bool folio_memcg_charged(struct folio *folio) { - struct mem_cgroup *memcg; - - if (mem_cgroup_disabled()) - return; + return false; +} - rcu_read_lock(); - memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); - if (likely(memcg)) - memcg_memory_event(memcg, event); - rcu_read_unlock(); +static inline struct mem_cgroup *folio_memcg_check(struct folio *folio) +{ + return NULL; } -#ifdef CONFIG_TRANSPARENT_HUGEPAGE -void mem_cgroup_split_huge_fixup(struct page *head); -#endif +static inline struct mem_cgroup *page_memcg_check(struct page *page) +{ + return NULL; +} -#else /* CONFIG_MEMCG */ +static inline struct mem_cgroup *get_mem_cgroup_from_objcg(struct obj_cgroup *objcg) +{ + return NULL; +} -#define MEM_CGROUP_ID_SHIFT 0 -#define MEM_CGROUP_ID_MAX 0 +static inline bool folio_memcg_kmem(struct folio *folio) +{ + return false; +} -struct mem_cgroup; +static inline bool PageMemcgKmem(struct page *page) +{ + return false; +} static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) { @@ -819,65 +1099,90 @@ static inline void memcg_memory_event_mm(struct mm_struct *mm, { } -static inline enum mem_cgroup_protection mem_cgroup_protected( - struct mem_cgroup *root, struct mem_cgroup *memcg) +static inline void mem_cgroup_protection(struct mem_cgroup *root, + struct mem_cgroup *memcg, + unsigned long *min, + unsigned long *low) { - return MEMCG_PROT_NONE; + *min = *low = 0; } -static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, - gfp_t gfp_mask, - struct mem_cgroup **memcgp, - bool compound) +static inline void mem_cgroup_calculate_protection(struct mem_cgroup *root, + struct mem_cgroup *memcg) +{ +} + +static inline bool mem_cgroup_unprotected(struct mem_cgroup *target, + struct mem_cgroup *memcg) +{ + return true; +} +static inline bool mem_cgroup_below_low(struct mem_cgroup *target, + struct mem_cgroup *memcg) +{ + return false; +} + +static inline bool mem_cgroup_below_min(struct mem_cgroup *target, + struct mem_cgroup *memcg) +{ + return false; +} + +static inline int mem_cgroup_charge(struct folio *folio, + struct mm_struct *mm, gfp_t gfp) { - *memcgp = NULL; return 0; } -static inline int mem_cgroup_try_charge_delay(struct page *page, - struct mm_struct *mm, - gfp_t gfp_mask, - struct mem_cgroup **memcgp, - bool compound) +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) { - *memcgp = NULL; return 0; } -static inline void mem_cgroup_commit_charge(struct page *page, - struct mem_cgroup *memcg, - bool lrucare, bool compound) +static inline void mem_cgroup_uncharge(struct folio *folio) { } -static inline void mem_cgroup_cancel_charge(struct page *page, - struct mem_cgroup *memcg, - bool compound) +static inline void mem_cgroup_uncharge_folios(struct folio_batch *folios) { } -static inline void mem_cgroup_uncharge(struct page *page) +static inline void mem_cgroup_replace_folio(struct folio *old, + struct folio *new) { } -static inline void mem_cgroup_uncharge_list(struct list_head *page_list) +static inline void mem_cgroup_migrate(struct folio *old, struct folio *new) { } -static inline void mem_cgroup_migrate(struct page *old, struct page *new) +static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg, + struct pglist_data *pgdat) { + return &pgdat->__lruvec; } -static inline struct lruvec *mem_cgroup_lruvec(struct pglist_data *pgdat, - struct mem_cgroup *memcg) +static inline struct lruvec *folio_lruvec(struct folio *folio) { - return node_lruvec(pgdat); + struct pglist_data *pgdat = folio_pgdat(folio); + return &pgdat->__lruvec; } -static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, - struct pglist_data *pgdat) +static inline +void lruvec_memcg_debug(struct lruvec *lruvec, struct folio *folio) { - return &pgdat->lruvec; +} + +static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) +{ + return NULL; } static inline bool mm_match_cgroup(struct mm_struct *mm, @@ -886,26 +1191,74 @@ static inline bool mm_match_cgroup(struct mm_struct *mm, return true; } -static inline bool task_in_mem_cgroup(struct task_struct *task, - const struct mem_cgroup *memcg) +static inline struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm) { - return true; + return NULL; } -static inline struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm) +static inline struct mem_cgroup *get_mem_cgroup_from_current(void) { return NULL; } -static inline struct mem_cgroup *get_mem_cgroup_from_page(struct page *page) +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) { } +static inline struct lruvec *folio_lruvec_lock(struct folio *folio) +{ + struct pglist_data *pgdat = folio_pgdat(folio); + + spin_lock(&pgdat->__lruvec.lru_lock); + return &pgdat->__lruvec; +} + +static inline struct lruvec *folio_lruvec_lock_irq(struct folio *folio) +{ + struct pglist_data *pgdat = folio_pgdat(folio); + + spin_lock_irq(&pgdat->__lruvec.lru_lock); + return &pgdat->__lruvec; +} + +static inline struct lruvec *folio_lruvec_lock_irqsave(struct folio *folio, + unsigned long *flagsp) +{ + struct pglist_data *pgdat = folio_pgdat(folio); + + spin_lock_irqsave(&pgdat->__lruvec.lru_lock, *flagsp); + return &pgdat->__lruvec; +} + static inline struct mem_cgroup * mem_cgroup_iter(struct mem_cgroup *root, struct mem_cgroup *prev, @@ -919,10 +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) @@ -937,6 +1289,23 @@ static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id) return NULL; } +#ifdef CONFIG_SHRINKER_DEBUG +static inline unsigned long mem_cgroup_ino(struct mem_cgroup *memcg) +{ + return 0; +} + +static inline struct mem_cgroup *mem_cgroup_get_from_ino(unsigned long ino) +{ + return NULL; +} +#endif + +static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) +{ + return NULL; +} + static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) { return NULL; @@ -947,11 +1316,6 @@ static inline bool mem_cgroup_online(struct mem_cgroup *memcg) return true; } -static inline unsigned long -mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru) -{ - return 0; -} static inline unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, enum lru_list lru, int zone_idx) @@ -959,14 +1323,12 @@ unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, return 0; } -static inline 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_max(struct mem_cgroup *memcg) { return 0; } -static inline unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg) +static inline unsigned long mem_cgroup_size(struct mem_cgroup *memcg) { return 0; } @@ -981,373 +1343,583 @@ mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg) { } -static inline struct mem_cgroup *lock_page_memcg(struct page *page) +static inline void mem_cgroup_handle_over_high(gfp_t gfp_mask) +{ +} + +static inline struct mem_cgroup *mem_cgroup_get_oom_group( + struct task_struct *victim, struct mem_cgroup *oom_domain) { return NULL; } -static inline void __unlock_page_memcg(struct mem_cgroup *memcg) +static inline void mem_cgroup_print_oom_group(struct mem_cgroup *memcg) { } -static inline void unlock_page_memcg(struct page *page) +static inline void mod_memcg_state(struct mem_cgroup *memcg, + enum memcg_stat_item idx, + int nr) { } -static inline void mem_cgroup_handle_over_high(void) +static inline void mod_memcg_page_state(struct page *page, + enum memcg_stat_item idx, int val) { } -static inline void mem_cgroup_enter_user_fault(void) +static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx) { + return 0; } -static inline void mem_cgroup_exit_user_fault(void) +static inline unsigned long lruvec_page_state(struct lruvec *lruvec, + enum node_stat_item idx) { + return node_page_state(lruvec_pgdat(lruvec), idx); } -static inline bool task_in_memcg_oom(struct task_struct *p) +static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, + enum node_stat_item idx) { - return false; + return node_page_state(lruvec_pgdat(lruvec), idx); } -static inline bool mem_cgroup_oom_synchronize(bool wait) +static inline void mem_cgroup_flush_stats(struct mem_cgroup *memcg) { - return false; } -static inline struct mem_cgroup *mem_cgroup_get_oom_group( - struct task_struct *victim, struct mem_cgroup *oom_domain) +static inline void mem_cgroup_flush_stats_ratelimited(struct mem_cgroup *memcg) { - return NULL; } -static inline void mem_cgroup_print_oom_group(struct mem_cgroup *memcg) +static inline void mod_lruvec_kmem_state(void *p, enum node_stat_item idx, + int val) +{ + struct page *page = virt_to_head_page(p); + + mod_node_page_state(page_pgdat(page), idx, val); +} + +static inline void count_memcg_events(struct mem_cgroup *memcg, + enum vm_event_item idx, + unsigned long count) { } -static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, - 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_events_mm(struct mm_struct *mm, + enum vm_event_item idx, unsigned long count) +{ +} + +static inline +void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx) +{ +} + +static inline void split_page_memcg(struct page *first, unsigned order) +{ +} + +static inline void folio_split_memcg_refs(struct folio *folio, + unsigned old_order, unsigned new_order) +{ +} + +static inline u64 cgroup_id_from_mm(struct mm_struct *mm) { return 0; } -static inline void __mod_memcg_state(struct mem_cgroup *memcg, - int idx, - int nr) +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) { + struct mem_cgroup *memcg; + + memcg = lruvec_memcg(lruvec); + if (!memcg) + return NULL; + memcg = parent_mem_cgroup(memcg); + if (!memcg) + return NULL; + return mem_cgroup_lruvec(memcg, lruvec_pgdat(lruvec)); } -static inline void mod_memcg_state(struct mem_cgroup *memcg, - int idx, - int nr) +static inline void unlock_page_lruvec(struct lruvec *lruvec) { + spin_unlock(&lruvec->lru_lock); } -static inline void __mod_memcg_page_state(struct page *page, - int idx, - int nr) +static inline void unlock_page_lruvec_irq(struct lruvec *lruvec) { + spin_unlock_irq(&lruvec->lru_lock); } -static inline void mod_memcg_page_state(struct page *page, - int idx, - int nr) +static inline void unlock_page_lruvec_irqrestore(struct lruvec *lruvec, + unsigned long flags) { + spin_unlock_irqrestore(&lruvec->lru_lock, flags); } -static inline unsigned long lruvec_page_state(struct lruvec *lruvec, - enum node_stat_item idx) +/* Test requires a stable folio->memcg binding, see folio_memcg() */ +static inline bool folio_matches_lruvec(struct folio *folio, + struct lruvec *lruvec) { - return node_page_state(lruvec_pgdat(lruvec), idx); + return lruvec_pgdat(lruvec) == folio_pgdat(folio) && + lruvec_memcg(lruvec) == folio_memcg(folio); +} + +/* Don't lock again iff page's lruvec locked */ +static inline struct lruvec *folio_lruvec_relock_irq(struct folio *folio, + struct lruvec *locked_lruvec) +{ + if (locked_lruvec) { + if (folio_matches_lruvec(folio, locked_lruvec)) + return locked_lruvec; + + unlock_page_lruvec_irq(locked_lruvec); + } + + return folio_lruvec_lock_irq(folio); +} + +/* 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 (*lruvecp) { + if (folio_matches_lruvec(folio, *lruvecp)) + return; + + unlock_page_lruvec_irqrestore(*lruvecp, *flags); + } + + *lruvecp = folio_lruvec_lock_irqsave(folio, flags); } -static inline void __mod_lruvec_state(struct lruvec *lruvec, - enum node_stat_item idx, int val) +#ifdef CONFIG_CGROUP_WRITEBACK + +struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb); +void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages, + unsigned long *pheadroom, unsigned long *pdirty, + unsigned long *pwriteback); + +void mem_cgroup_track_foreign_dirty_slowpath(struct folio *folio, + struct bdi_writeback *wb); + +static inline void mem_cgroup_track_foreign_dirty(struct folio *folio, + struct bdi_writeback *wb) { - __mod_node_page_state(lruvec_pgdat(lruvec), idx, val); + struct mem_cgroup *memcg; + + if (mem_cgroup_disabled()) + return; + + memcg = folio_memcg(folio); + if (unlikely(memcg && &memcg->css != wb->memcg_css)) + mem_cgroup_track_foreign_dirty_slowpath(folio, wb); } -static inline void mod_lruvec_state(struct lruvec *lruvec, - enum node_stat_item idx, int val) +void mem_cgroup_flush_foreign(struct bdi_writeback *wb); + +#else /* CONFIG_CGROUP_WRITEBACK */ + +static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb) { - mod_node_page_state(lruvec_pgdat(lruvec), idx, val); + return NULL; } -static inline void __mod_lruvec_page_state(struct page *page, - enum node_stat_item idx, int val) +static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb, + unsigned long *pfilepages, + unsigned long *pheadroom, + unsigned long *pdirty, + unsigned long *pwriteback) { - __mod_node_page_state(page_pgdat(page), idx, val); } -static inline void mod_lruvec_page_state(struct page *page, - enum node_stat_item idx, int val) +static inline void mem_cgroup_track_foreign_dirty(struct folio *folio, + struct bdi_writeback *wb) { - mod_node_page_state(page_pgdat(page), idx, val); } -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 mem_cgroup_flush_foreign(struct bdi_writeback *wb) { - return 0; } -static inline void mem_cgroup_split_huge_fixup(struct page *head) +#endif /* CONFIG_CGROUP_WRITEBACK */ + +struct sock; +#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); +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) { + 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 void count_memcg_events(struct mem_cgroup *memcg, - enum vm_event_item idx, - unsigned long count) +static inline u64 mem_cgroup_get_socket_pressure(struct mem_cgroup *memcg) +{ + unsigned int seq; + u64 val; + + do { + 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 void count_memcg_page_event(struct page *page, - int idx) +static inline u64 mem_cgroup_get_socket_pressure(struct mem_cgroup *memcg) { + return READ_ONCE(memcg->socket_pressure); } +#endif -static inline -void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx) +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; } -#endif /* CONFIG_MEMCG */ +#else +#define mem_cgroup_sockets_enabled 0 -/* idx can be of type enum memcg_stat_item or node_stat_item */ -static inline void __inc_memcg_state(struct mem_cgroup *memcg, - int idx) +static inline void mem_cgroup_sk_alloc(struct sock *sk) { - __mod_memcg_state(memcg, idx, 1); } -/* idx can be of type enum memcg_stat_item or node_stat_item */ -static inline void __dec_memcg_state(struct mem_cgroup *memcg, - int idx) +static inline void mem_cgroup_sk_free(struct sock *sk) { - __mod_memcg_state(memcg, idx, -1); } -/* idx can be of type enum memcg_stat_item or node_stat_item */ -static inline void __inc_memcg_page_state(struct page *page, - int idx) +static inline void mem_cgroup_sk_inherit(const struct sock *sk, struct sock *newsk) { - __mod_memcg_page_state(page, idx, 1); } -/* idx can be of type enum memcg_stat_item or node_stat_item */ -static inline void __dec_memcg_page_state(struct page *page, - int idx) +static inline bool mem_cgroup_sk_charge(const struct sock *sk, + unsigned int nr_pages, + gfp_t gfp_mask) { - __mod_memcg_page_state(page, idx, -1); + return false; } -static inline void __inc_lruvec_state(struct lruvec *lruvec, - enum node_stat_item idx) +static inline void mem_cgroup_sk_uncharge(const struct sock *sk, + unsigned int nr_pages) { - __mod_lruvec_state(lruvec, idx, 1); } -static inline void __dec_lruvec_state(struct lruvec *lruvec, - enum node_stat_item idx) +static inline void set_shrinker_bit(struct mem_cgroup *memcg, + int nid, int shrinker_id) { - __mod_lruvec_state(lruvec, idx, -1); } -static inline void __inc_lruvec_page_state(struct page *page, - enum node_stat_item idx) +static inline int shrinker_id(struct shrinker *shrinker) { - __mod_lruvec_page_state(page, idx, 1); + return -1; } +#endif + +#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); + +/* + * 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 void __dec_lruvec_page_state(struct page *page, - enum node_stat_item idx) +static inline struct obj_cgroup *get_obj_cgroup_from_current(void) { - __mod_lruvec_page_state(page, idx, -1); + struct obj_cgroup *objcg = current_obj_cgroup(); + + if (objcg) + obj_cgroup_get(objcg); + + return objcg; } -/* idx can be of type enum memcg_stat_item or node_stat_item */ -static inline void inc_memcg_state(struct mem_cgroup *memcg, - int idx) +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_bpf_enabled_key; +static inline bool memcg_bpf_enabled(void) { - mod_memcg_state(memcg, idx, 1); + return static_branch_likely(&memcg_bpf_enabled_key); } -/* idx can be of type enum memcg_stat_item or node_stat_item */ -static inline void dec_memcg_state(struct mem_cgroup *memcg, - int idx) +extern struct static_key_false memcg_kmem_online_key; + +static inline bool memcg_kmem_online(void) { - mod_memcg_state(memcg, idx, -1); + return static_branch_likely(&memcg_kmem_online_key); } -/* idx can be of type enum memcg_stat_item or node_stat_item */ -static inline void inc_memcg_page_state(struct page *page, - int idx) +static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, + int order) { - mod_memcg_page_state(page, idx, 1); + if (memcg_kmem_online()) + return __memcg_kmem_charge_page(page, gfp, order); + return 0; } -/* idx can be of type enum memcg_stat_item or node_stat_item */ -static inline void dec_memcg_page_state(struct page *page, - int idx) +static inline void memcg_kmem_uncharge_page(struct page *page, int order) { - mod_memcg_page_state(page, idx, -1); + if (memcg_kmem_online()) + __memcg_kmem_uncharge_page(page, order); } -static inline void inc_lruvec_state(struct lruvec *lruvec, - enum node_stat_item idx) +/* + * A helper for accessing memcg's kmem_id, used for getting + * corresponding LRU lists. + */ +static inline int memcg_kmem_id(struct mem_cgroup *memcg) { - mod_lruvec_state(lruvec, idx, 1); + return memcg ? memcg->kmemcg_id : -1; } -static inline void dec_lruvec_state(struct lruvec *lruvec, - enum node_stat_item idx) +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) { - mod_lruvec_state(lruvec, idx, -1); + struct mem_cgroup *memcg; + + if (!memcg_kmem_online()) + return; + + rcu_read_lock(); + memcg = obj_cgroup_memcg(objcg); + count_memcg_events(memcg, idx, count); + rcu_read_unlock(); } -static inline void inc_lruvec_page_state(struct page *page, - enum node_stat_item idx) +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) { - mod_lruvec_page_state(page, idx, 1); + return memcg ? css_is_dying(&memcg->css) : false; } -static inline void dec_lruvec_page_state(struct page *page, - enum node_stat_item idx) +#else +static inline bool mem_cgroup_kmem_disabled(void) { - mod_lruvec_page_state(page, idx, -1); + return true; } -#ifdef CONFIG_CGROUP_WRITEBACK +static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, + int order) +{ + return 0; +} -struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb); -void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages, - unsigned long *pheadroom, unsigned long *pdirty, - unsigned long *pwriteback); +static inline void memcg_kmem_uncharge_page(struct page *page, int order) +{ +} -#else /* CONFIG_CGROUP_WRITEBACK */ +static inline int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, + int order) +{ + return 0; +} -static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb) +static inline void __memcg_kmem_uncharge_page(struct page *page, int order) +{ +} + +static inline struct obj_cgroup *get_obj_cgroup_from_folio(struct folio *folio) { return NULL; } -static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb, - unsigned long *pfilepages, - unsigned long *pheadroom, - unsigned long *pdirty, - unsigned long *pwriteback) +static inline bool memcg_bpf_enabled(void) { + return false; } -#endif /* CONFIG_CGROUP_WRITEBACK */ +static inline bool memcg_kmem_online(void) +{ + return false; +} -struct sock; -bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); -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) +static inline int memcg_kmem_id(struct mem_cgroup *memcg) +{ + return -1; +} + +static inline struct mem_cgroup *mem_cgroup_from_slab_obj(void *p) +{ + return NULL; +} + +static inline void count_objcg_events(struct obj_cgroup *objcg, + enum vm_event_item idx, + unsigned long count) +{ +} + +static inline ino_t page_cgroup_ino(struct page *page) +{ + return 0; +} + +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) { - if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && memcg->tcpmem_pressure) - return true; - do { - if (time_before(jiffies, memcg->socket_pressure)) - return true; - } while ((memcg = parent_mem_cgroup(memcg))); return false; } +#endif /* CONFIG_MEMCG */ + +#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 -#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 bool obj_cgroup_may_zswap(struct obj_cgroup *objcg) +{ + return true; +} +static inline void obj_cgroup_charge_zswap(struct obj_cgroup *objcg, + size_t size) { - return false; +} +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 -struct kmem_cache *memcg_kmem_get_cache(struct kmem_cache *cachep); -void memcg_kmem_put_cache(struct kmem_cache *cachep); -int memcg_kmem_charge_memcg(struct page *page, gfp_t gfp, int order, - struct mem_cgroup *memcg); - -#ifdef CONFIG_MEMCG_KMEM -int memcg_kmem_charge(struct page *page, gfp_t gfp, int order); -void memcg_kmem_uncharge(struct page *page, int order); -extern struct static_key_false memcg_kmem_enabled_key; -extern struct workqueue_struct *memcg_kmem_cache_wq; +/* Cgroup v1-related declarations */ -extern int memcg_nr_cache_ids; -void memcg_get_cache_ids(void); -void memcg_put_cache_ids(void); +#ifdef CONFIG_MEMCG_V1 +unsigned long memcg1_soft_limit_reclaim(pg_data_t *pgdat, int order, + gfp_t gfp_mask, + unsigned long *total_scanned); -/* - * Helper macro to loop through all memcg-specific caches. Callers must still - * check if the cache is valid (it is either valid or NULL). - * the slab_mutex must be held when looping through those caches - */ -#define for_each_memcg_cache_index(_idx) \ - for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++) +bool mem_cgroup_oom_synchronize(bool wait); -static inline bool memcg_kmem_enabled(void) +static inline bool task_in_memcg_oom(struct task_struct *p) { - return static_branch_unlikely(&memcg_kmem_enabled_key); + return p->memcg_in_oom; } -/* - * 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. - */ -static inline int memcg_cache_id(struct mem_cgroup *memcg) +static inline void mem_cgroup_enter_user_fault(void) { - return memcg ? memcg->kmemcg_id : -1; + WARN_ON(current->in_user_fault); + current->in_user_fault = 1; } -extern int memcg_expand_shrinker_maps(int new_id); +static inline void mem_cgroup_exit_user_fault(void) +{ + WARN_ON(!current->in_user_fault); + current->in_user_fault = 0; +} -extern void memcg_set_shrinker_bit(struct mem_cgroup *memcg, - int nid, int shrinker_id); -#else +void memcg1_swapout(struct folio *folio, swp_entry_t entry); +void memcg1_swapin(swp_entry_t entry, unsigned int nr_pages); -static inline int memcg_kmem_charge(struct page *page, gfp_t gfp, int order) +#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 void memcg_kmem_uncharge(struct page *page, int order) +static inline bool task_in_memcg_oom(struct task_struct *p) { + return false; } -#define for_each_memcg_cache_index(_idx) \ - for (; NULL; ) - -static inline bool memcg_kmem_enabled(void) +static inline bool mem_cgroup_oom_synchronize(bool wait) { return false; } -static inline int memcg_cache_id(struct mem_cgroup *memcg) +static inline void mem_cgroup_enter_user_fault(void) +{ +} + +static inline void mem_cgroup_exit_user_fault(void) { - return -1; } -static inline void memcg_get_cache_ids(void) +static inline void memcg1_swapout(struct folio *folio, swp_entry_t entry) { } -static inline void memcg_put_cache_ids(void) +static inline void memcg1_swapin(swp_entry_t entry, unsigned int nr_pages) { } -static inline void memcg_set_shrinker_bit(struct mem_cgroup *memcg, - int nid, int shrinker_id) { } -#endif /* CONFIG_MEMCG_KMEM */ +#endif /* CONFIG_MEMCG_V1 */ #endif /* _LINUX_MEMCONTROL_H */ |