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1688 lines
41 KiB
1688 lines
41 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* memcontrol.h - Memory Controller |
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* |
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* Copyright IBM Corporation, 2007 |
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* Author Balbir Singh <[email protected]> |
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* |
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* Copyright 2007 OpenVZ SWsoft Inc |
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* Author: Pavel Emelianov <[email protected]> |
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*/ |
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|
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#ifndef _LINUX_MEMCONTROL_H |
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#define _LINUX_MEMCONTROL_H |
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#include <linux/cgroup.h> |
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#include <linux/vm_event_item.h> |
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#include <linux/hardirq.h> |
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#include <linux/jump_label.h> |
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#include <linux/page_counter.h> |
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#include <linux/vmpressure.h> |
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#include <linux/eventfd.h> |
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#include <linux/mm.h> |
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#include <linux/vmstat.h> |
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#include <linux/writeback.h> |
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#include <linux/page-flags.h> |
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|
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struct mem_cgroup; |
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struct obj_cgroup; |
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struct page; |
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struct mm_struct; |
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struct kmem_cache; |
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|
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/* Cgroup-specific page state, on top of universal node page state */ |
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enum memcg_stat_item { |
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MEMCG_SWAP = NR_VM_NODE_STAT_ITEMS, |
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MEMCG_SOCK, |
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MEMCG_PERCPU_B, |
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MEMCG_NR_STAT, |
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}; |
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|
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enum memcg_memory_event { |
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MEMCG_LOW, |
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MEMCG_HIGH, |
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MEMCG_MAX, |
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MEMCG_OOM, |
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MEMCG_OOM_KILL, |
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MEMCG_SWAP_HIGH, |
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MEMCG_SWAP_MAX, |
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MEMCG_SWAP_FAIL, |
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MEMCG_NR_MEMORY_EVENTS, |
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}; |
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|
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struct mem_cgroup_reclaim_cookie { |
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pg_data_t *pgdat; |
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unsigned int generation; |
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}; |
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#ifdef CONFIG_MEMCG |
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|
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#define MEM_CGROUP_ID_SHIFT 16 |
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#define MEM_CGROUP_ID_MAX USHRT_MAX |
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|
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struct mem_cgroup_id { |
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int id; |
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refcount_t ref; |
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}; |
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|
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/* |
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* Per memcg event counter is incremented at every pagein/pageout. With THP, |
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* it will be incremented by the number of pages. This counter is used |
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* to trigger some periodic events. This is straightforward and better |
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* than using jiffies etc. to handle periodic memcg event. |
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*/ |
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enum mem_cgroup_events_target { |
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MEM_CGROUP_TARGET_THRESH, |
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MEM_CGROUP_TARGET_SOFTLIMIT, |
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MEM_CGROUP_NTARGETS, |
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}; |
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|
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struct memcg_vmstats_percpu { |
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long stat[MEMCG_NR_STAT]; |
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unsigned long events[NR_VM_EVENT_ITEMS]; |
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unsigned long nr_page_events; |
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unsigned long targets[MEM_CGROUP_NTARGETS]; |
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}; |
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|
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struct mem_cgroup_reclaim_iter { |
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struct mem_cgroup *position; |
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/* scan generation, increased every round-trip */ |
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unsigned int generation; |
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}; |
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|
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struct lruvec_stat { |
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long count[NR_VM_NODE_STAT_ITEMS]; |
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}; |
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|
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struct batched_lruvec_stat { |
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s32 count[NR_VM_NODE_STAT_ITEMS]; |
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}; |
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|
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/* |
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* Bitmap of shrinker::id corresponding to memcg-aware shrinkers, |
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* which have elements charged to this memcg. |
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*/ |
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struct memcg_shrinker_map { |
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struct rcu_head rcu; |
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unsigned long map[]; |
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}; |
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|
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/* |
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* per-node information in memory controller. |
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*/ |
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struct mem_cgroup_per_node { |
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struct lruvec lruvec; |
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|
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/* |
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* Legacy local VM stats. This should be struct lruvec_stat and |
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* cannot be optimized to struct batched_lruvec_stat. Because |
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* the threshold of the lruvec_stat_cpu can be as big as |
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* MEMCG_CHARGE_BATCH * PAGE_SIZE. It can fit into s32. But this |
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* filed has no upper limit. |
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*/ |
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struct lruvec_stat __percpu *lruvec_stat_local; |
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|
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/* Subtree VM stats (batched updates) */ |
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struct batched_lruvec_stat __percpu *lruvec_stat_cpu; |
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atomic_long_t lruvec_stat[NR_VM_NODE_STAT_ITEMS]; |
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|
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unsigned long lru_zone_size[MAX_NR_ZONES][NR_LRU_LISTS]; |
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struct mem_cgroup_reclaim_iter iter; |
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struct memcg_shrinker_map __rcu *shrinker_map; |
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struct rb_node tree_node; /* RB tree node */ |
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unsigned long usage_in_excess;/* Set to the value by which */ |
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/* the soft limit is exceeded*/ |
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bool on_tree; |
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struct mem_cgroup *memcg; /* Back pointer, we cannot */ |
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/* use container_of */ |
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}; |
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|
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struct mem_cgroup_threshold { |
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struct eventfd_ctx *eventfd; |
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unsigned long threshold; |
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}; |
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|
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/* For threshold */ |
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struct mem_cgroup_threshold_ary { |
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/* An array index points to threshold just below or equal to usage. */ |
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int current_threshold; |
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/* Size of entries[] */ |
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unsigned int size; |
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/* Array of thresholds */ |
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struct mem_cgroup_threshold entries[]; |
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}; |
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struct mem_cgroup_thresholds { |
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/* Primary thresholds array */ |
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struct mem_cgroup_threshold_ary *primary; |
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/* |
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* Spare threshold array. |
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* This is needed to make mem_cgroup_unregister_event() "never fail". |
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* It must be able to store at least primary->size - 1 entries. |
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*/ |
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struct mem_cgroup_threshold_ary *spare; |
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}; |
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|
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enum memcg_kmem_state { |
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KMEM_NONE, |
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KMEM_ALLOCATED, |
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KMEM_ONLINE, |
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}; |
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|
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#if defined(CONFIG_SMP) |
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struct memcg_padding { |
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char x[0]; |
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} ____cacheline_internodealigned_in_smp; |
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#define MEMCG_PADDING(name) struct memcg_padding name; |
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#else |
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#define MEMCG_PADDING(name) |
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#endif |
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|
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/* |
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* Remember four most recent foreign writebacks with dirty pages in this |
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* cgroup. Inode sharing is expected to be uncommon and, even if we miss |
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* one in a given round, we're likely to catch it later if it keeps |
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* foreign-dirtying, so a fairly low count should be enough. |
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* |
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* See mem_cgroup_track_foreign_dirty_slowpath() for details. |
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*/ |
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#define MEMCG_CGWB_FRN_CNT 4 |
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|
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struct memcg_cgwb_frn { |
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u64 bdi_id; /* bdi->id of the foreign inode */ |
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int memcg_id; /* memcg->css.id of foreign inode */ |
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u64 at; /* jiffies_64 at the time of dirtying */ |
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struct wb_completion done; /* tracks in-flight foreign writebacks */ |
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}; |
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|
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/* |
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* Bucket for arbitrarily byte-sized objects charged to a memory |
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* cgroup. The bucket can be reparented in one piece when the cgroup |
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* is destroyed, without having to round up the individual references |
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* of all live memory objects in the wild. |
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*/ |
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struct obj_cgroup { |
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struct percpu_ref refcnt; |
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struct mem_cgroup *memcg; |
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atomic_t nr_charged_bytes; |
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union { |
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struct list_head list; |
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struct rcu_head rcu; |
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}; |
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}; |
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|
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/* |
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* The memory controller data structure. The memory controller controls both |
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* page cache and RSS per cgroup. We would eventually like to provide |
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* statistics based on the statistics developed by Rik Van Riel for clock-pro, |
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* to help the administrator determine what knobs to tune. |
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*/ |
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struct mem_cgroup { |
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struct cgroup_subsys_state css; |
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|
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/* Private memcg ID. Used to ID objects that outlive the cgroup */ |
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struct mem_cgroup_id id; |
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|
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/* Accounted resources */ |
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struct page_counter memory; /* Both v1 & v2 */ |
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union { |
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struct page_counter swap; /* v2 only */ |
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struct page_counter memsw; /* v1 only */ |
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}; |
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|
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/* Legacy consumer-oriented counters */ |
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struct page_counter kmem; /* v1 only */ |
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struct page_counter tcpmem; /* v1 only */ |
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|
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/* Range enforcement for interrupt charges */ |
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struct work_struct high_work; |
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unsigned long soft_limit; |
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|
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/* vmpressure notifications */ |
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struct vmpressure vmpressure; |
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|
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/* |
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* Should the OOM killer kill all belonging tasks, had it kill one? |
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*/ |
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bool oom_group; |
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|
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/* protected by memcg_oom_lock */ |
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bool oom_lock; |
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int under_oom; |
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int swappiness; |
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/* OOM-Killer disable */ |
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int oom_kill_disable; |
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|
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/* memory.events and memory.events.local */ |
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struct cgroup_file events_file; |
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struct cgroup_file events_local_file; |
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|
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/* handle for "memory.swap.events" */ |
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struct cgroup_file swap_events_file; |
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|
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/* protect arrays of thresholds */ |
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struct mutex thresholds_lock; |
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|
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/* thresholds for memory usage. RCU-protected */ |
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struct mem_cgroup_thresholds thresholds; |
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|
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/* thresholds for mem+swap usage. RCU-protected */ |
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struct mem_cgroup_thresholds memsw_thresholds; |
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|
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/* For oom notifier event fd */ |
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struct list_head oom_notify; |
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|
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/* |
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* Should we move charges of a task when a task is moved into this |
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* mem_cgroup ? And what type of charges should we move ? |
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*/ |
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unsigned long move_charge_at_immigrate; |
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/* taken only while moving_account > 0 */ |
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spinlock_t move_lock; |
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unsigned long move_lock_flags; |
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MEMCG_PADDING(_pad1_); |
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atomic_long_t vmstats[MEMCG_NR_STAT]; |
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atomic_long_t vmevents[NR_VM_EVENT_ITEMS]; |
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|
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/* memory.events */ |
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atomic_long_t memory_events[MEMCG_NR_MEMORY_EVENTS]; |
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atomic_long_t memory_events_local[MEMCG_NR_MEMORY_EVENTS]; |
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|
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unsigned long socket_pressure; |
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|
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/* Legacy tcp memory accounting */ |
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bool tcpmem_active; |
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int tcpmem_pressure; |
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|
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#ifdef CONFIG_MEMCG_KMEM |
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int kmemcg_id; |
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enum memcg_kmem_state kmem_state; |
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struct obj_cgroup __rcu *objcg; |
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struct list_head objcg_list; /* list of inherited objcgs */ |
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#endif |
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MEMCG_PADDING(_pad2_); |
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|
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/* |
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* set > 0 if pages under this cgroup are moving to other cgroup. |
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*/ |
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atomic_t moving_account; |
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struct task_struct *move_lock_task; |
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|
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/* Legacy local VM stats and events */ |
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struct memcg_vmstats_percpu __percpu *vmstats_local; |
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|
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/* Subtree VM stats and events (batched updates) */ |
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struct memcg_vmstats_percpu __percpu *vmstats_percpu; |
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#ifdef CONFIG_CGROUP_WRITEBACK |
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struct list_head cgwb_list; |
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struct wb_domain cgwb_domain; |
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struct memcg_cgwb_frn cgwb_frn[MEMCG_CGWB_FRN_CNT]; |
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#endif |
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|
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/* List of events which userspace want to receive */ |
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struct list_head event_list; |
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spinlock_t event_list_lock; |
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#ifdef CONFIG_TRANSPARENT_HUGEPAGE |
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struct deferred_split deferred_split_queue; |
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#endif |
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struct mem_cgroup_per_node *nodeinfo[0]; |
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/* WARNING: nodeinfo must be the last member here */ |
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}; |
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/* |
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* size of first charge trial. "32" comes from vmscan.c's magic value. |
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* TODO: maybe necessary to use big numbers in big irons. |
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*/ |
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#define MEMCG_CHARGE_BATCH 32U |
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extern struct mem_cgroup *root_mem_cgroup; |
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enum page_memcg_data_flags { |
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/* page->memcg_data is a pointer to an objcgs vector */ |
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MEMCG_DATA_OBJCGS = (1UL << 0), |
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/* page has been accounted as a non-slab kernel page */ |
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MEMCG_DATA_KMEM = (1UL << 1), |
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/* the next bit after the last actual flag */ |
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__NR_MEMCG_DATA_FLAGS = (1UL << 2), |
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}; |
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#define MEMCG_DATA_FLAGS_MASK (__NR_MEMCG_DATA_FLAGS - 1) |
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|
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/* |
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* page_memcg - get the memory cgroup associated with a page |
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* @page: a pointer to the page struct |
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* |
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* Returns a pointer to the memory cgroup associated with the page, |
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* or NULL. This function assumes that the page is known to have a |
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* proper memory cgroup pointer. It's not safe to call this function |
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* against some type of pages, e.g. slab pages or ex-slab pages. |
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* |
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* Any of the following ensures page and memcg binding stability: |
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* - the page lock |
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* - LRU isolation |
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* - lock_page_memcg() |
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* - exclusive reference |
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*/ |
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static inline struct mem_cgroup *page_memcg(struct page *page) |
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{ |
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unsigned long memcg_data = page->memcg_data; |
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VM_BUG_ON_PAGE(PageSlab(page), page); |
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VM_BUG_ON_PAGE(memcg_data & MEMCG_DATA_OBJCGS, page); |
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return (struct mem_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); |
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} |
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|
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/* |
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* page_memcg_rcu - locklessly get the memory cgroup associated with a page |
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* @page: a pointer to the page struct |
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* |
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* Returns a pointer to the memory cgroup associated with the page, |
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* or NULL. This function assumes that the page is known to have a |
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* proper memory cgroup pointer. It's not safe to call this function |
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* against some type of pages, e.g. slab pages or ex-slab pages. |
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*/ |
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static inline struct mem_cgroup *page_memcg_rcu(struct page *page) |
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{ |
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VM_BUG_ON_PAGE(PageSlab(page), page); |
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WARN_ON_ONCE(!rcu_read_lock_held()); |
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return (struct mem_cgroup *)(READ_ONCE(page->memcg_data) & |
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~MEMCG_DATA_FLAGS_MASK); |
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} |
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|
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/* |
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* page_memcg_check - get the memory cgroup associated with a page |
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* @page: a pointer to the page struct |
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* |
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* Returns a pointer to the memory cgroup associated with the page, |
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* or NULL. This function unlike page_memcg() can take any page |
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* as an argument. It has to be used in cases when it's not known if a page |
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* has an associated memory cgroup pointer or an object cgroups vector. |
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* |
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* Any of the following ensures page and memcg binding stability: |
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* - the page lock |
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* - LRU isolation |
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* - lock_page_memcg() |
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* - exclusive reference |
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*/ |
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static inline struct mem_cgroup *page_memcg_check(struct page *page) |
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{ |
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/* |
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* Because page->memcg_data might be changed asynchronously |
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* for slab pages, READ_ONCE() should be used here. |
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*/ |
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unsigned long memcg_data = READ_ONCE(page->memcg_data); |
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|
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if (memcg_data & MEMCG_DATA_OBJCGS) |
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return NULL; |
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return (struct mem_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); |
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} |
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|
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/* |
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* PageMemcgKmem - check if the page has MemcgKmem flag set |
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* @page: a pointer to the page struct |
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* |
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* Checks if the page has MemcgKmem flag set. The caller must ensure that |
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* the page has an associated memory cgroup. It's not safe to call this function |
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* against some types of pages, e.g. slab pages. |
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*/ |
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static inline bool PageMemcgKmem(struct page *page) |
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{ |
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VM_BUG_ON_PAGE(page->memcg_data & MEMCG_DATA_OBJCGS, page); |
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return page->memcg_data & MEMCG_DATA_KMEM; |
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} |
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|
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#ifdef CONFIG_MEMCG_KMEM |
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/* |
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* page_objcgs - get the object cgroups vector associated with a page |
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* @page: a pointer to the page struct |
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* |
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* Returns a pointer to the object cgroups vector associated with the page, |
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* or NULL. This function assumes that the page is known to have an |
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* associated object cgroups vector. It's not safe to call this function |
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* against pages, which might have an associated memory cgroup: e.g. |
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* kernel stack pages. |
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*/ |
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static inline struct obj_cgroup **page_objcgs(struct page *page) |
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{ |
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unsigned long memcg_data = READ_ONCE(page->memcg_data); |
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|
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VM_BUG_ON_PAGE(memcg_data && !(memcg_data & MEMCG_DATA_OBJCGS), page); |
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VM_BUG_ON_PAGE(memcg_data & MEMCG_DATA_KMEM, page); |
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|
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return (struct obj_cgroup **)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); |
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} |
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|
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/* |
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* page_objcgs_check - get the object cgroups vector associated with a page |
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* @page: a pointer to the page struct |
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* |
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* Returns a pointer to the object cgroups vector associated with the page, |
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* or NULL. This function is safe to use if the page can be directly associated |
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* with a memory cgroup. |
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*/ |
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static inline struct obj_cgroup **page_objcgs_check(struct page *page) |
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{ |
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unsigned long memcg_data = READ_ONCE(page->memcg_data); |
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|
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if (!memcg_data || !(memcg_data & MEMCG_DATA_OBJCGS)) |
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return NULL; |
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|
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VM_BUG_ON_PAGE(memcg_data & MEMCG_DATA_KMEM, page); |
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|
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return (struct obj_cgroup **)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); |
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} |
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|
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#else |
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static inline struct obj_cgroup **page_objcgs(struct page *page) |
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{ |
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return NULL; |
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} |
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|
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static inline struct obj_cgroup **page_objcgs_check(struct page *page) |
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{ |
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return NULL; |
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} |
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#endif |
|
|
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static __always_inline bool memcg_stat_item_in_bytes(int idx) |
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{ |
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if (idx == MEMCG_PERCPU_B) |
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return true; |
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return vmstat_item_in_bytes(idx); |
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} |
|
|
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static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
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{ |
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return (memcg == root_mem_cgroup); |
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} |
|
|
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static inline bool mem_cgroup_disabled(void) |
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{ |
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return !cgroup_subsys_enabled(memory_cgrp_subsys); |
|
} |
|
|
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static inline unsigned long mem_cgroup_protection(struct mem_cgroup *root, |
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struct mem_cgroup *memcg, |
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bool in_low_reclaim) |
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{ |
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if (mem_cgroup_disabled()) |
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return 0; |
|
|
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/* |
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* There is no reclaim protection applied to a targeted reclaim. |
|
* We are special casing this specific case here because |
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* mem_cgroup_protected calculation is not robust enough to keep |
|
* the protection invariant for calculated effective values for |
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* parallel reclaimers with different reclaim target. This is |
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* 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. |
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* |
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* Example |
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* Let's have global and A's reclaim in parallel: |
|
* | |
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* A (low=2G, usage = 3G, max = 3G, children_low_usage = 1.5G) |
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* |\ |
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* | C (low = 1G, usage = 2.5G) |
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* B (low = 1G, usage = 0.5G) |
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* |
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* For the global reclaim |
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* A.elow = A.low |
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* B.elow = min(B.usage, B.low) because children_low_usage <= A.elow |
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* C.elow = min(C.usage, C.low) |
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* |
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* With the effective values resetting we have A reclaim |
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* A.elow = 0 |
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* B.elow = B.low |
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* C.elow = C.low |
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* |
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* If the global reclaim races with A's reclaim then |
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* B.elow = C.elow = 0 because children_low_usage > A.elow) |
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* is possible and reclaiming B would be violating the protection. |
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* |
|
*/ |
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if (root == memcg) |
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return 0; |
|
|
|
if (in_low_reclaim) |
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return READ_ONCE(memcg->memory.emin); |
|
|
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return max(READ_ONCE(memcg->memory.emin), |
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READ_ONCE(memcg->memory.elow)); |
|
} |
|
|
|
void mem_cgroup_calculate_protection(struct mem_cgroup *root, |
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struct mem_cgroup *memcg); |
|
|
|
static inline bool mem_cgroup_supports_protection(struct mem_cgroup *memcg) |
|
{ |
|
/* |
|
* The root memcg doesn't account charges, and doesn't support |
|
* protection. |
|
*/ |
|
return !mem_cgroup_disabled() && !mem_cgroup_is_root(memcg); |
|
|
|
} |
|
|
|
static inline bool mem_cgroup_below_low(struct mem_cgroup *memcg) |
|
{ |
|
if (!mem_cgroup_supports_protection(memcg)) |
|
return false; |
|
|
|
return READ_ONCE(memcg->memory.elow) >= |
|
page_counter_read(&memcg->memory); |
|
} |
|
|
|
static inline bool mem_cgroup_below_min(struct mem_cgroup *memcg) |
|
{ |
|
if (!mem_cgroup_supports_protection(memcg)) |
|
return false; |
|
|
|
return READ_ONCE(memcg->memory.emin) >= |
|
page_counter_read(&memcg->memory); |
|
} |
|
|
|
int mem_cgroup_charge(struct page *page, struct mm_struct *mm, gfp_t gfp_mask); |
|
|
|
void mem_cgroup_uncharge(struct page *page); |
|
void mem_cgroup_uncharge_list(struct list_head *page_list); |
|
|
|
void mem_cgroup_migrate(struct page *oldpage, struct page *newpage); |
|
|
|
static struct mem_cgroup_per_node * |
|
mem_cgroup_nodeinfo(struct mem_cgroup *memcg, int nid) |
|
{ |
|
return memcg->nodeinfo[nid]; |
|
} |
|
|
|
/** |
|
* 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 @memcg & |
|
* @pgdat combination. This can be the node lruvec, if the memory |
|
* controller is disabled. |
|
*/ |
|
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 = &pgdat->__lruvec; |
|
goto out; |
|
} |
|
|
|
if (!memcg) |
|
memcg = root_mem_cgroup; |
|
|
|
mz = mem_cgroup_nodeinfo(memcg, pgdat->node_id); |
|
lruvec = &mz->lruvec; |
|
out: |
|
/* |
|
* Since a node can be onlined after the mem_cgroup was created, |
|
* we have to be prepared to initialize lruvec->pgdat here; |
|
* and if offlined then reonlined, we need to reinitialize it. |
|
*/ |
|
if (unlikely(lruvec->pgdat != pgdat)) |
|
lruvec->pgdat = pgdat; |
|
return lruvec; |
|
} |
|
|
|
/** |
|
* mem_cgroup_page_lruvec - return lruvec for isolating/putting an LRU page |
|
* @page: the page |
|
* @pgdat: pgdat of the page |
|
* |
|
* This function relies on page->mem_cgroup being stable. |
|
*/ |
|
static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, |
|
struct pglist_data *pgdat) |
|
{ |
|
struct mem_cgroup *memcg = page_memcg(page); |
|
|
|
VM_WARN_ON_ONCE_PAGE(!memcg && !mem_cgroup_disabled(), page); |
|
return mem_cgroup_lruvec(memcg, pgdat); |
|
} |
|
|
|
static inline bool lruvec_holds_page_lru_lock(struct page *page, |
|
struct lruvec *lruvec) |
|
{ |
|
pg_data_t *pgdat = page_pgdat(page); |
|
const struct mem_cgroup *memcg; |
|
struct mem_cgroup_per_node *mz; |
|
|
|
if (mem_cgroup_disabled()) |
|
return lruvec == &pgdat->__lruvec; |
|
|
|
mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); |
|
memcg = page_memcg(page) ? : root_mem_cgroup; |
|
|
|
return lruvec->pgdat == pgdat && mz->memcg == 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 lruvec *lock_page_lruvec(struct page *page); |
|
struct lruvec *lock_page_lruvec_irq(struct page *page); |
|
struct lruvec *lock_page_lruvec_irqsave(struct page *page, |
|
unsigned long *flags); |
|
|
|
#ifdef CONFIG_DEBUG_VM |
|
void lruvec_memcg_debug(struct lruvec *lruvec, struct page *page); |
|
#else |
|
static inline void lruvec_memcg_debug(struct lruvec *lruvec, struct page *page) |
|
{ |
|
} |
|
#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_put(struct obj_cgroup *objcg) |
|
{ |
|
percpu_ref_put(&objcg->refcnt); |
|
} |
|
|
|
/* |
|
* 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. |
|
*/ |
|
static inline struct mem_cgroup *obj_cgroup_memcg(struct obj_cgroup *objcg) |
|
{ |
|
return READ_ONCE(objcg->memcg); |
|
} |
|
|
|
static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
|
{ |
|
if (memcg) |
|
css_put(&memcg->css); |
|
} |
|
|
|
#define mem_cgroup_from_counter(counter, member) \ |
|
container_of(counter, struct mem_cgroup, member) |
|
|
|
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 *); |
|
|
|
static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
|
{ |
|
if (mem_cgroup_disabled()) |
|
return 0; |
|
|
|
return memcg->id.id; |
|
} |
|
struct mem_cgroup *mem_cgroup_from_id(unsigned short id); |
|
|
|
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; |
|
|
|
if (mem_cgroup_disabled()) |
|
return NULL; |
|
|
|
mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); |
|
return mz->memcg; |
|
} |
|
|
|
/** |
|
* 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. |
|
*/ |
|
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); |
|
} |
|
|
|
static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, |
|
struct mem_cgroup *root) |
|
{ |
|
if (root == memcg) |
|
return true; |
|
return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup); |
|
} |
|
|
|
static inline bool mm_match_cgroup(struct mm_struct *mm, |
|
struct mem_cgroup *memcg) |
|
{ |
|
struct mem_cgroup *task_memcg; |
|
bool match = false; |
|
|
|
rcu_read_lock(); |
|
task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
|
if (task_memcg) |
|
match = mem_cgroup_is_descendant(task_memcg, memcg); |
|
rcu_read_unlock(); |
|
return match; |
|
} |
|
|
|
struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page); |
|
ino_t page_cgroup_ino(struct page *page); |
|
|
|
static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
|
{ |
|
if (mem_cgroup_disabled()) |
|
return true; |
|
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); |
|
|
|
static inline |
|
unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, |
|
enum lru_list lru, int zone_idx) |
|
{ |
|
struct mem_cgroup_per_node *mz; |
|
|
|
mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); |
|
return READ_ONCE(mz->lru_zone_size[zone_idx][lru]); |
|
} |
|
|
|
void mem_cgroup_handle_over_high(void); |
|
|
|
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 bool cgroup_memory_noswap; |
|
#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. |
|
* Keep in sync with memcg_exact_page_state(). |
|
*/ |
|
static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx) |
|
{ |
|
long x = atomic_long_read(&memcg->vmstats[idx]); |
|
#ifdef CONFIG_SMP |
|
if (x < 0) |
|
x = 0; |
|
#endif |
|
return x; |
|
} |
|
|
|
/* |
|
* idx can be of type enum memcg_stat_item or node_stat_item. |
|
* Keep in sync with memcg_exact_page_state(). |
|
*/ |
|
static inline unsigned long memcg_page_state_local(struct mem_cgroup *memcg, |
|
int idx) |
|
{ |
|
long x = 0; |
|
int cpu; |
|
|
|
for_each_possible_cpu(cpu) |
|
x += per_cpu(memcg->vmstats_local->stat[idx], cpu); |
|
#ifdef CONFIG_SMP |
|
if (x < 0) |
|
x = 0; |
|
#endif |
|
return x; |
|
} |
|
|
|
void __mod_memcg_state(struct mem_cgroup *memcg, int 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) |
|
{ |
|
unsigned long flags; |
|
|
|
local_irq_save(flags); |
|
__mod_memcg_state(memcg, idx, val); |
|
local_irq_restore(flags); |
|
} |
|
|
|
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 = atomic_long_read(&pn->lruvec_stat[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_stat_local->count[idx], cpu); |
|
#ifdef CONFIG_SMP |
|
if (x < 0) |
|
x = 0; |
|
#endif |
|
return x; |
|
} |
|
|
|
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); |
|
|
|
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); |
|
} |
|
|
|
unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
|
gfp_t gfp_mask, |
|
unsigned long *total_scanned); |
|
|
|
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); |
|
} |
|
|
|
static inline void count_memcg_event_mm(struct mm_struct *mm, |
|
enum vm_event_item idx) |
|
{ |
|
struct mem_cgroup *memcg; |
|
|
|
if (mem_cgroup_disabled()) |
|
return; |
|
|
|
rcu_read_lock(); |
|
memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
|
if (likely(memcg)) |
|
count_memcg_events(memcg, idx, 1); |
|
rcu_read_unlock(); |
|
} |
|
|
|
static inline void memcg_memory_event(struct mem_cgroup *memcg, |
|
enum memcg_memory_event event) |
|
{ |
|
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); |
|
|
|
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); |
|
|
|
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_mm(struct mm_struct *mm, |
|
enum memcg_memory_event event) |
|
{ |
|
struct mem_cgroup *memcg; |
|
|
|
if (mem_cgroup_disabled()) |
|
return; |
|
|
|
rcu_read_lock(); |
|
memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
|
if (likely(memcg)) |
|
memcg_memory_event(memcg, event); |
|
rcu_read_unlock(); |
|
} |
|
|
|
void split_page_memcg(struct page *head, unsigned int nr); |
|
|
|
#else /* CONFIG_MEMCG */ |
|
|
|
#define MEM_CGROUP_ID_SHIFT 0 |
|
#define MEM_CGROUP_ID_MAX 0 |
|
|
|
struct mem_cgroup; |
|
|
|
static inline struct mem_cgroup *page_memcg(struct page *page) |
|
{ |
|
return NULL; |
|
} |
|
|
|
static inline struct mem_cgroup *page_memcg_rcu(struct page *page) |
|
{ |
|
WARN_ON_ONCE(!rcu_read_lock_held()); |
|
return NULL; |
|
} |
|
|
|
static inline struct mem_cgroup *page_memcg_check(struct page *page) |
|
{ |
|
return NULL; |
|
} |
|
|
|
static inline bool PageMemcgKmem(struct page *page) |
|
{ |
|
return false; |
|
} |
|
|
|
static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
|
{ |
|
return true; |
|
} |
|
|
|
static inline bool mem_cgroup_disabled(void) |
|
{ |
|
return true; |
|
} |
|
|
|
static inline void memcg_memory_event(struct mem_cgroup *memcg, |
|
enum memcg_memory_event event) |
|
{ |
|
} |
|
|
|
static inline void memcg_memory_event_mm(struct mm_struct *mm, |
|
enum memcg_memory_event event) |
|
{ |
|
} |
|
|
|
static inline unsigned long mem_cgroup_protection(struct mem_cgroup *root, |
|
struct mem_cgroup *memcg, |
|
bool in_low_reclaim) |
|
{ |
|
return 0; |
|
} |
|
|
|
static inline void mem_cgroup_calculate_protection(struct mem_cgroup *root, |
|
struct mem_cgroup *memcg) |
|
{ |
|
} |
|
|
|
static inline bool mem_cgroup_below_low(struct mem_cgroup *memcg) |
|
{ |
|
return false; |
|
} |
|
|
|
static inline bool mem_cgroup_below_min(struct mem_cgroup *memcg) |
|
{ |
|
return false; |
|
} |
|
|
|
static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm, |
|
gfp_t gfp_mask) |
|
{ |
|
return 0; |
|
} |
|
|
|
static inline void mem_cgroup_uncharge(struct page *page) |
|
{ |
|
} |
|
|
|
static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
|
{ |
|
} |
|
|
|
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_page_lruvec(struct page *page, |
|
struct pglist_data *pgdat) |
|
{ |
|
return &pgdat->__lruvec; |
|
} |
|
|
|
static inline bool lruvec_holds_page_lru_lock(struct page *page, |
|
struct lruvec *lruvec) |
|
{ |
|
pg_data_t *pgdat = page_pgdat(page); |
|
|
|
return lruvec == &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, |
|
struct mem_cgroup *memcg) |
|
{ |
|
return true; |
|
} |
|
|
|
static inline struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm) |
|
{ |
|
return NULL; |
|
} |
|
|
|
static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
|
{ |
|
} |
|
|
|
static inline struct lruvec *lock_page_lruvec(struct page *page) |
|
{ |
|
struct pglist_data *pgdat = page_pgdat(page); |
|
|
|
spin_lock(&pgdat->__lruvec.lru_lock); |
|
return &pgdat->__lruvec; |
|
} |
|
|
|
static inline struct lruvec *lock_page_lruvec_irq(struct page *page) |
|
{ |
|
struct pglist_data *pgdat = page_pgdat(page); |
|
|
|
spin_lock_irq(&pgdat->__lruvec.lru_lock); |
|
return &pgdat->__lruvec; |
|
} |
|
|
|
static inline struct lruvec *lock_page_lruvec_irqsave(struct page *page, |
|
unsigned long *flagsp) |
|
{ |
|
struct pglist_data *pgdat = page_pgdat(page); |
|
|
|
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, |
|
struct mem_cgroup_reclaim_cookie *reclaim) |
|
{ |
|
return NULL; |
|
} |
|
|
|
static inline void mem_cgroup_iter_break(struct mem_cgroup *root, |
|
struct mem_cgroup *prev) |
|
{ |
|
} |
|
|
|
static inline int 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) |
|
{ |
|
return 0; |
|
} |
|
|
|
static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id) |
|
{ |
|
WARN_ON_ONCE(id); |
|
/* XXX: This should always return root_mem_cgroup */ |
|
return NULL; |
|
} |
|
|
|
static inline 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; |
|
} |
|
|
|
static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
|
{ |
|
return true; |
|
} |
|
|
|
static inline |
|
unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, |
|
enum lru_list lru, int zone_idx) |
|
{ |
|
return 0; |
|
} |
|
|
|
static inline unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg) |
|
{ |
|
return 0; |
|
} |
|
|
|
static inline unsigned long mem_cgroup_size(struct mem_cgroup *memcg) |
|
{ |
|
return 0; |
|
} |
|
|
|
static inline void |
|
mem_cgroup_print_oom_context(struct mem_cgroup *memcg, struct task_struct *p) |
|
{ |
|
} |
|
|
|
static inline void |
|
mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg) |
|
{ |
|
} |
|
|
|
static inline struct mem_cgroup *lock_page_memcg(struct page *page) |
|
{ |
|
return NULL; |
|
} |
|
|
|
static inline void __unlock_page_memcg(struct mem_cgroup *memcg) |
|
{ |
|
} |
|
|
|
static inline void unlock_page_memcg(struct page *page) |
|
{ |
|
} |
|
|
|
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( |
|
struct task_struct *victim, struct mem_cgroup *oom_domain) |
|
{ |
|
return NULL; |
|
} |
|
|
|
static inline void mem_cgroup_print_oom_group(struct mem_cgroup *memcg) |
|
{ |
|
} |
|
|
|
static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx) |
|
{ |
|
return 0; |
|
} |
|
|
|
static inline unsigned long memcg_page_state_local(struct mem_cgroup *memcg, |
|
int idx) |
|
{ |
|
return 0; |
|
} |
|
|
|
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, |
|
int nr) |
|
{ |
|
} |
|
|
|
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 unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
|
enum node_stat_item idx) |
|
{ |
|
return node_page_state(lruvec_pgdat(lruvec), idx); |
|
} |
|
|
|
static inline void __mod_memcg_lruvec_state(struct lruvec *lruvec, |
|
enum node_stat_item idx, int val) |
|
{ |
|
} |
|
|
|
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 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 |
|
unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
|
gfp_t gfp_mask, |
|
unsigned long *total_scanned) |
|
{ |
|
return 0; |
|
} |
|
|
|
static inline void split_page_memcg(struct page *head, unsigned int nr) |
|
{ |
|
} |
|
|
|
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_event_mm(struct mm_struct *mm, enum vm_event_item idx) |
|
{ |
|
} |
|
|
|
static inline void lruvec_memcg_debug(struct lruvec *lruvec, struct page *page) |
|
{ |
|
} |
|
#endif /* CONFIG_MEMCG */ |
|
|
|
static inline void __inc_lruvec_kmem_state(void *p, enum node_stat_item idx) |
|
{ |
|
__mod_lruvec_kmem_state(p, idx, 1); |
|
} |
|
|
|
static inline void __dec_lruvec_kmem_state(void *p, enum node_stat_item idx) |
|
{ |
|
__mod_lruvec_kmem_state(p, idx, -1); |
|
} |
|
|
|
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 unlock_page_lruvec(struct lruvec *lruvec) |
|
{ |
|
spin_unlock(&lruvec->lru_lock); |
|
} |
|
|
|
static inline void unlock_page_lruvec_irq(struct lruvec *lruvec) |
|
{ |
|
spin_unlock_irq(&lruvec->lru_lock); |
|
} |
|
|
|
static inline void unlock_page_lruvec_irqrestore(struct lruvec *lruvec, |
|
unsigned long flags) |
|
{ |
|
spin_unlock_irqrestore(&lruvec->lru_lock, flags); |
|
} |
|
|
|
/* Don't lock again iff page's lruvec locked */ |
|
static inline struct lruvec *relock_page_lruvec_irq(struct page *page, |
|
struct lruvec *locked_lruvec) |
|
{ |
|
if (locked_lruvec) { |
|
if (lruvec_holds_page_lru_lock(page, locked_lruvec)) |
|
return locked_lruvec; |
|
|
|
unlock_page_lruvec_irq(locked_lruvec); |
|
} |
|
|
|
return lock_page_lruvec_irq(page); |
|
} |
|
|
|
/* Don't lock again iff page's lruvec locked */ |
|
static inline struct lruvec *relock_page_lruvec_irqsave(struct page *page, |
|
struct lruvec *locked_lruvec, unsigned long *flags) |
|
{ |
|
if (locked_lruvec) { |
|
if (lruvec_holds_page_lru_lock(page, locked_lruvec)) |
|
return locked_lruvec; |
|
|
|
unlock_page_lruvec_irqrestore(locked_lruvec, *flags); |
|
} |
|
|
|
return lock_page_lruvec_irqsave(page, flags); |
|
} |
|
|
|
#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 page *page, |
|
struct bdi_writeback *wb); |
|
|
|
static inline void mem_cgroup_track_foreign_dirty(struct page *page, |
|
struct bdi_writeback *wb) |
|
{ |
|
if (mem_cgroup_disabled()) |
|
return; |
|
|
|
if (unlikely(&page_memcg(page)->css != wb->memcg_css)) |
|
mem_cgroup_track_foreign_dirty_slowpath(page, wb); |
|
} |
|
|
|
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) |
|
{ |
|
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 void mem_cgroup_track_foreign_dirty(struct page *page, |
|
struct bdi_writeback *wb) |
|
{ |
|
} |
|
|
|
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); |
|
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) |
|
{ |
|
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; |
|
} |
|
|
|
extern int memcg_expand_shrinker_maps(int new_id); |
|
|
|
extern void memcg_set_shrinker_bit(struct mem_cgroup *memcg, |
|
int nid, int 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) |
|
{ |
|
return false; |
|
} |
|
|
|
static inline void memcg_set_shrinker_bit(struct mem_cgroup *memcg, |
|
int nid, int shrinker_id) |
|
{ |
|
} |
|
#endif |
|
|
|
#ifdef CONFIG_MEMCG_KMEM |
|
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); |
|
|
|
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 int memcg_nr_cache_ids; |
|
void memcg_get_cache_ids(void); |
|
void memcg_put_cache_ids(void); |
|
|
|
/* |
|
* 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)++) |
|
|
|
static inline bool memcg_kmem_enabled(void) |
|
{ |
|
return static_branch_likely(&memcg_kmem_enabled_key); |
|
} |
|
|
|
static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
|
int order) |
|
{ |
|
if (memcg_kmem_enabled()) |
|
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()) |
|
__memcg_kmem_uncharge_page(page, order); |
|
} |
|
|
|
/* |
|
* A helper for accessing memcg's kmem_id, used for getting |
|
* corresponding LRU lists. |
|
*/ |
|
static inline int memcg_cache_id(struct mem_cgroup *memcg) |
|
{ |
|
return memcg ? memcg->kmemcg_id : -1; |
|
} |
|
|
|
struct mem_cgroup *mem_cgroup_from_obj(void *p); |
|
|
|
#else |
|
|
|
static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
|
int order) |
|
{ |
|
return 0; |
|
} |
|
|
|
static inline void memcg_kmem_uncharge_page(struct page *page, int order) |
|
{ |
|
} |
|
|
|
static inline int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
|
int order) |
|
{ |
|
return 0; |
|
} |
|
|
|
static inline void __memcg_kmem_uncharge_page(struct page *page, int order) |
|
{ |
|
} |
|
|
|
#define for_each_memcg_cache_index(_idx) \ |
|
for (; NULL; ) |
|
|
|
static inline bool memcg_kmem_enabled(void) |
|
{ |
|
return false; |
|
} |
|
|
|
static inline int memcg_cache_id(struct mem_cgroup *memcg) |
|
{ |
|
return -1; |
|
} |
|
|
|
static inline void memcg_get_cache_ids(void) |
|
{ |
|
} |
|
|
|
static inline void memcg_put_cache_ids(void) |
|
{ |
|
} |
|
|
|
static inline struct mem_cgroup *mem_cgroup_from_obj(void *p) |
|
{ |
|
return NULL; |
|
} |
|
|
|
#endif /* CONFIG_MEMCG_KMEM */ |
|
|
|
#endif /* _LINUX_MEMCONTROL_H */
|
|
|