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![Johannes Weiner](/assets/img/avatar_default.png)
Breno and Josef report a deadlock scenario from cgroup reclaim re-entering the filesystem: [ 361.546690] ====================================================== [ 361.559210] WARNING: possible circular locking dependency detected [ 361.571703] 6.5.0-0_fbk700_debug_rc0_kbuilder_13159_gbf787a128001 #1 Tainted: G S E [ 361.589704] ------------------------------------------------------ [ 361.602277] find/9315 is trying to acquire lock: [ 361.611625] ffff88837ba140c0 (&delayed_node->mutex){+.+.}-{4:4}, at: __btrfs_release_delayed_node+0x68/0x4f0 [ 361.631437] [ 361.631437] but task is already holding lock: [ 361.643243] ffff8881765b8678 (btrfs-tree-01){++++}-{4:4}, at: btrfs_tree_read_lock+0x1e/0x40 [ 362.904457] mutex_lock_nested+0x1c/0x30 [ 362.912414] __btrfs_release_delayed_node+0x68/0x4f0 [ 362.922460] btrfs_evict_inode+0x301/0x770 [ 362.982726] evict+0x17c/0x380 [ 362.988944] prune_icache_sb+0x100/0x1d0 [ 363.005559] super_cache_scan+0x1f8/0x260 [ 363.013695] do_shrink_slab+0x2a2/0x540 [ 363.021489] shrink_slab_memcg+0x237/0x3d0 [ 363.050606] shrink_slab+0xa7/0x240 [ 363.083382] shrink_node_memcgs+0x262/0x3b0 [ 363.091870] shrink_node+0x1a4/0x720 [ 363.099150] shrink_zones+0x1f6/0x5d0 [ 363.148798] do_try_to_free_pages+0x19b/0x5e0 [ 363.157633] try_to_free_mem_cgroup_pages+0x266/0x370 [ 363.190575] reclaim_high+0x16f/0x1f0 [ 363.208409] mem_cgroup_handle_over_high+0x10b/0x270 [ 363.246678] try_charge_memcg+0xaf2/0xc70 [ 363.304151] charge_memcg+0xf0/0x350 [ 363.320070] __mem_cgroup_charge+0x28/0x40 [ 363.328371] __filemap_add_folio+0x870/0xd50 [ 363.371303] filemap_add_folio+0xdd/0x310 [ 363.399696] __filemap_get_folio+0x2fc/0x7d0 [ 363.419086] pagecache_get_page+0xe/0x30 [ 363.427048] alloc_extent_buffer+0x1cd/0x6a0 [ 363.435704] read_tree_block+0x43/0xc0 [ 363.443316] read_block_for_search+0x361/0x510 [ 363.466690] btrfs_search_slot+0xc8c/0x1520 This is caused by the mem_cgroup_handle_over_high() not respecting the gfp_mask of the allocation context. We used to only call this function on resume to userspace, where no locks were held. Butc9afe31ec4
("memcg: synchronously enforce memory.high for large overcharges") added a call from the allocation context without considering the gfp. Link: https://lkml.kernel.org/r/20230914152139.100822-1-hannes@cmpxchg.org Fixes:c9afe31ec4
("memcg: synchronously enforce memory.high for large overcharges") Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Reported-by: Breno Leitao <leitao@debian.org> Reported-by: Josef Bacik <josef@toxicpanda.com> Acked-by: Shakeel Butt <shakeelb@google.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Roman Gushchin <roman.gushchin@linux.dev> Cc: Muchun Song <songmuchun@bytedance.com> Cc: <stable@vger.kernel.org> [5.17+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
1907 lines
46 KiB
C
1907 lines
46 KiB
C
/* 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 <balbir@linux.vnet.ibm.com>
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*
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* Copyright 2007 OpenVZ SWsoft Inc
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* Author: Pavel Emelianov <xemul@openvz.org>
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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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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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/* 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_VMALLOC,
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MEMCG_KMEM,
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MEMCG_ZSWAP_B,
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MEMCG_ZSWAPPED,
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MEMCG_NR_STAT,
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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_OOM_GROUP_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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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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#define MEM_CGROUP_ID_SHIFT 16
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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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* 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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struct memcg_vmstats_percpu;
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struct memcg_vmstats;
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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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* Bitmap and deferred work of shrinker::id corresponding to memcg-aware
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* shrinkers, which have elements charged to this memcg.
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*/
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struct shrinker_info {
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struct rcu_head rcu;
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atomic_long_t *nr_deferred;
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unsigned long *map;
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int map_nr_max;
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};
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struct lruvec_stats_percpu {
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/* Local (CPU and cgroup) state */
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long state[NR_VM_NODE_STAT_ITEMS];
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/* Delta calculation for lockless upward propagation */
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long state_prev[NR_VM_NODE_STAT_ITEMS];
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};
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struct lruvec_stats {
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/* Aggregated (CPU and subtree) state */
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long state[NR_VM_NODE_STAT_ITEMS];
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/* Non-hierarchical (CPU aggregated) state */
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long state_local[NR_VM_NODE_STAT_ITEMS];
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/* Pending child counts during tree propagation */
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long state_pending[NR_VM_NODE_STAT_ITEMS];
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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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struct lruvec_stats_percpu __percpu *lruvec_stats_percpu;
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struct lruvec_stats lruvec_stats;
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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 shrinker_info __rcu *shrinker_info;
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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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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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/* 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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* 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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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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* 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; /* protected by objcg_lock */
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struct rcu_head rcu;
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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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/* Private memcg ID. Used to ID objects that outlive the cgroup */
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struct mem_cgroup_id id;
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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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/* 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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/* Range enforcement for interrupt charges */
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struct work_struct high_work;
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#if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_ZSWAP)
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unsigned long zswap_max;
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#endif
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unsigned long soft_limit;
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/* vmpressure notifications */
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struct vmpressure vmpressure;
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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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/* 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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/* 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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/* handle for "memory.swap.events" */
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struct cgroup_file swap_events_file;
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/* protect arrays of thresholds */
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struct mutex thresholds_lock;
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/* thresholds for memory usage. RCU-protected */
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struct mem_cgroup_thresholds thresholds;
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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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/* For oom notifier event fd */
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struct list_head oom_notify;
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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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CACHELINE_PADDING(_pad1_);
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/* memory.stat */
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struct memcg_vmstats *vmstats;
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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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* Hint of reclaim pressure for socket memroy management. Note
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* that this indicator should NOT be used in legacy cgroup mode
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* where socket memory is accounted/charged separately.
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*/
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unsigned long socket_pressure;
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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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#ifdef CONFIG_MEMCG_KMEM
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int kmemcg_id;
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struct obj_cgroup __rcu *objcg;
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/* list of inherited objcgs, protected by objcg_lock */
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struct list_head objcg_list;
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#endif
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CACHELINE_PADDING(_pad2_);
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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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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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/* 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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#ifdef CONFIG_LRU_GEN
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/* per-memcg mm_struct list */
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struct lru_gen_mm_list mm_list;
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#endif
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struct mem_cgroup_per_node *nodeinfo[];
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};
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/*
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* size of first charge trial.
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* TODO: maybe necessary to use big numbers in big irons or dynamic based of the
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* workload.
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*/
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#define MEMCG_CHARGE_BATCH 64U
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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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static inline bool folio_memcg_kmem(struct folio *folio);
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/*
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* After the initialization objcg->memcg is always pointing at
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* a valid memcg, but can be atomically swapped to the parent memcg.
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*
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* The caller must ensure that the returned memcg won't be released:
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* e.g. acquire the rcu_read_lock or css_set_lock.
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*/
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static inline struct mem_cgroup *obj_cgroup_memcg(struct obj_cgroup *objcg)
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{
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return READ_ONCE(objcg->memcg);
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}
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/*
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* __folio_memcg - Get the memory cgroup associated with a non-kmem folio
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* @folio: Pointer to the folio.
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*
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* Returns a pointer to the memory cgroup associated with the folio,
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* or NULL. This function assumes that the folio 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 folios, e.g. slab folios or ex-slab folios or
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* kmem folios.
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*/
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static inline struct mem_cgroup *__folio_memcg(struct folio *folio)
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{
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unsigned long memcg_data = folio->memcg_data;
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VM_BUG_ON_FOLIO(folio_test_slab(folio), folio);
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VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_OBJCGS, folio);
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VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_KMEM, folio);
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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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* __folio_objcg - get the object cgroup associated with a kmem folio.
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* @folio: Pointer to the folio.
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*
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* Returns a pointer to the object cgroup associated with the folio,
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* or NULL. This function assumes that the folio is known to have a
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* proper object cgroup pointer. It's not safe to call this function
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* against some type of folios, e.g. slab folios or ex-slab folios or
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* LRU folios.
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*/
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static inline struct obj_cgroup *__folio_objcg(struct folio *folio)
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{
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unsigned long memcg_data = folio->memcg_data;
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VM_BUG_ON_FOLIO(folio_test_slab(folio), folio);
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VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_OBJCGS, folio);
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VM_BUG_ON_FOLIO(!(memcg_data & MEMCG_DATA_KMEM), folio);
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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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* folio_memcg - Get the memory cgroup associated with a folio.
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* @folio: Pointer to the folio.
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*
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* Returns a pointer to the memory cgroup associated with the folio,
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* or NULL. This function assumes that the folio 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 folios, e.g. slab folios or ex-slab folios.
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*
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* For a non-kmem folio any of the following ensures folio and memcg binding
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* stability:
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*
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* - the folio lock
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* - LRU isolation
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* - folio_memcg_lock()
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* - exclusive reference
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* - mem_cgroup_trylock_pages()
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*
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* For a kmem folio a caller should hold an rcu read lock to protect memcg
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* associated with a kmem folio from being released.
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*/
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static inline struct mem_cgroup *folio_memcg(struct folio *folio)
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{
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if (folio_memcg_kmem(folio))
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return obj_cgroup_memcg(__folio_objcg(folio));
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return __folio_memcg(folio);
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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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return folio_memcg(page_folio(page));
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}
|
|
|
|
/**
|
|
* folio_memcg_rcu - Locklessly get the memory cgroup associated with a folio.
|
|
* @folio: Pointer to the folio.
|
|
*
|
|
* This function assumes that the folio is known to have a
|
|
* proper memory cgroup pointer. It's not safe to call this function
|
|
* against some type of folios, e.g. slab folios or ex-slab folios.
|
|
*
|
|
* Return: A pointer to the memory cgroup associated with the folio,
|
|
* or NULL.
|
|
*/
|
|
static inline struct mem_cgroup *folio_memcg_rcu(struct folio *folio)
|
|
{
|
|
unsigned long memcg_data = READ_ONCE(folio->memcg_data);
|
|
|
|
VM_BUG_ON_FOLIO(folio_test_slab(folio), folio);
|
|
WARN_ON_ONCE(!rcu_read_lock_held());
|
|
|
|
if (memcg_data & MEMCG_DATA_KMEM) {
|
|
struct obj_cgroup *objcg;
|
|
|
|
objcg = (void *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK);
|
|
return obj_cgroup_memcg(objcg);
|
|
}
|
|
|
|
return (struct mem_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK);
|
|
}
|
|
|
|
/*
|
|
* 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
|
|
* - lock_folio_memcg()
|
|
* - exclusive reference
|
|
* - mem_cgroup_trylock_pages()
|
|
*
|
|
* For a kmem folio a caller should hold an rcu read lock to protect memcg
|
|
* associated with a kmem folio from being released.
|
|
*/
|
|
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_OBJCGS)
|
|
return NULL;
|
|
|
|
if (memcg_data & MEMCG_DATA_KMEM) {
|
|
struct obj_cgroup *objcg;
|
|
|
|
objcg = (void *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK);
|
|
return obj_cgroup_memcg(objcg);
|
|
}
|
|
|
|
return (struct mem_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
#ifdef CONFIG_MEMCG_KMEM
|
|
/*
|
|
* 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_OBJCGS, folio);
|
|
return folio->memcg_data & MEMCG_DATA_KMEM;
|
|
}
|
|
|
|
|
|
#else
|
|
static inline bool folio_memcg_kmem(struct folio *folio)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
#endif
|
|
|
|
static inline bool PageMemcgKmem(struct page *page)
|
|
{
|
|
return folio_memcg_kmem(page_folio(page));
|
|
}
|
|
|
|
static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg)
|
|
{
|
|
return (memcg == root_mem_cgroup);
|
|
}
|
|
|
|
static inline bool mem_cgroup_disabled(void)
|
|
{
|
|
return !cgroup_subsys_enabled(memory_cgrp_subsys);
|
|
}
|
|
|
|
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;
|
|
|
|
*min = READ_ONCE(memcg->memory.emin);
|
|
*low = READ_ONCE(memcg->memory.elow);
|
|
}
|
|
|
|
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)
|
|
{
|
|
/*
|
|
* 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_swapin_charge_folio(struct folio *folio, struct mm_struct *mm,
|
|
gfp_t gfp, swp_entry_t entry);
|
|
void mem_cgroup_swapin_uncharge_swap(swp_entry_t entry);
|
|
|
|
void __mem_cgroup_uncharge(struct folio *folio);
|
|
|
|
/**
|
|
* 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_list(struct list_head *page_list);
|
|
static inline void mem_cgroup_uncharge_list(struct list_head *page_list)
|
|
{
|
|
if (mem_cgroup_disabled())
|
|
return;
|
|
__mem_cgroup_uncharge_list(page_list);
|
|
}
|
|
|
|
void mem_cgroup_migrate(struct folio *old, struct folio *new);
|
|
|
|
/**
|
|
* 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 = memcg->nodeinfo[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;
|
|
}
|
|
|
|
/**
|
|
* 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));
|
|
}
|
|
|
|
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 *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)
|
|
{
|
|
percpu_ref_put(&objcg->refcnt);
|
|
}
|
|
|
|
static inline bool mem_cgroup_tryget(struct mem_cgroup *memcg)
|
|
{
|
|
return !memcg || css_tryget(&memcg->css);
|
|
}
|
|
|
|
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 *);
|
|
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)
|
|
{
|
|
if (mem_cgroup_disabled())
|
|
return 0;
|
|
|
|
return memcg->id.id;
|
|
}
|
|
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;
|
|
|
|
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.
|
|
*/
|
|
static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg)
|
|
{
|
|
return mem_cgroup_from_css(memcg->css.parent);
|
|
}
|
|
|
|
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_folio(struct folio *folio);
|
|
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);
|
|
}
|
|
|
|
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(gfp_t 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);
|
|
|
|
void folio_memcg_lock(struct folio *folio);
|
|
void folio_memcg_unlock(struct folio *folio);
|
|
|
|
void __mod_memcg_state(struct mem_cgroup *memcg, int idx, int val);
|
|
|
|
/* try to stablize folio_memcg() for all the pages in a memcg */
|
|
static inline bool mem_cgroup_trylock_pages(struct mem_cgroup *memcg)
|
|
{
|
|
rcu_read_lock();
|
|
|
|
if (mem_cgroup_disabled() || !atomic_read(&memcg->moving_account))
|
|
return true;
|
|
|
|
rcu_read_unlock();
|
|
return false;
|
|
}
|
|
|
|
static inline void mem_cgroup_unlock_pages(void)
|
|
{
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
/* idx can be of type enum memcg_stat_item or node_stat_item */
|
|
static inline void mod_memcg_state(struct mem_cgroup *memcg,
|
|
int idx, int val)
|
|
{
|
|
unsigned long flags;
|
|
|
|
local_irq_save(flags);
|
|
__mod_memcg_state(memcg, idx, val);
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static inline void mod_memcg_page_state(struct page *page,
|
|
int idx, int val)
|
|
{
|
|
struct mem_cgroup *memcg;
|
|
|
|
if (mem_cgroup_disabled())
|
|
return;
|
|
|
|
rcu_read_lock();
|
|
memcg = page_memcg(page);
|
|
if (memcg)
|
|
mod_memcg_state(memcg, idx, val);
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx);
|
|
|
|
static inline unsigned long lruvec_page_state(struct lruvec *lruvec,
|
|
enum node_stat_item idx)
|
|
{
|
|
struct mem_cgroup_per_node *pn;
|
|
long x;
|
|
|
|
if (mem_cgroup_disabled())
|
|
return node_page_state(lruvec_pgdat(lruvec), idx);
|
|
|
|
pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec);
|
|
x = READ_ONCE(pn->lruvec_stats.state[idx]);
|
|
#ifdef CONFIG_SMP
|
|
if (x < 0)
|
|
x = 0;
|
|
#endif
|
|
return x;
|
|
}
|
|
|
|
static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec,
|
|
enum node_stat_item idx)
|
|
{
|
|
struct mem_cgroup_per_node *pn;
|
|
long x = 0;
|
|
|
|
if (mem_cgroup_disabled())
|
|
return node_page_state(lruvec_pgdat(lruvec), idx);
|
|
|
|
pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec);
|
|
x = READ_ONCE(pn->lruvec_stats.state_local[idx]);
|
|
#ifdef CONFIG_SMP
|
|
if (x < 0)
|
|
x = 0;
|
|
#endif
|
|
return x;
|
|
}
|
|
|
|
void mem_cgroup_flush_stats(void);
|
|
void mem_cgroup_flush_stats_ratelimited(void);
|
|
|
|
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);
|
|
}
|
|
|
|
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_folio_events(struct folio *folio,
|
|
enum vm_event_item idx, unsigned long nr)
|
|
{
|
|
struct mem_cgroup *memcg = folio_memcg(folio);
|
|
|
|
if (memcg)
|
|
count_memcg_events(memcg, idx, nr);
|
|
}
|
|
|
|
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);
|
|
|
|
unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order,
|
|
gfp_t gfp_mask,
|
|
unsigned long *total_scanned);
|
|
|
|
#else /* CONFIG_MEMCG */
|
|
|
|
#define MEM_CGROUP_ID_SHIFT 0
|
|
|
|
static inline struct mem_cgroup *folio_memcg(struct folio *folio)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline struct mem_cgroup *page_memcg(struct page *page)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline struct mem_cgroup *folio_memcg_rcu(struct folio *folio)
|
|
{
|
|
WARN_ON_ONCE(!rcu_read_lock_held());
|
|
return NULL;
|
|
}
|
|
|
|
static inline struct mem_cgroup *folio_memcg_check(struct folio *folio)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline struct mem_cgroup *page_memcg_check(struct page *page)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline bool folio_memcg_kmem(struct folio *folio)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
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 void mem_cgroup_protection(struct mem_cgroup *root,
|
|
struct mem_cgroup *memcg,
|
|
unsigned long *min,
|
|
unsigned long *low)
|
|
{
|
|
*min = *low = 0;
|
|
}
|
|
|
|
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)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int mem_cgroup_swapin_charge_folio(struct folio *folio,
|
|
struct mm_struct *mm, gfp_t gfp, swp_entry_t entry)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void mem_cgroup_swapin_uncharge_swap(swp_entry_t entry)
|
|
{
|
|
}
|
|
|
|
static inline void mem_cgroup_uncharge(struct folio *folio)
|
|
{
|
|
}
|
|
|
|
static inline void mem_cgroup_uncharge_list(struct list_head *page_list)
|
|
{
|
|
}
|
|
|
|
static inline void mem_cgroup_migrate(struct folio *old, struct folio *new)
|
|
{
|
|
}
|
|
|
|
static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg,
|
|
struct pglist_data *pgdat)
|
|
{
|
|
return &pgdat->__lruvec;
|
|
}
|
|
|
|
static inline struct lruvec *folio_lruvec(struct folio *folio)
|
|
{
|
|
struct pglist_data *pgdat = folio_pgdat(folio);
|
|
return &pgdat->__lruvec;
|
|
}
|
|
|
|
static inline
|
|
void lruvec_memcg_debug(struct lruvec *lruvec, struct folio *folio)
|
|
{
|
|
}
|
|
|
|
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
|
|
struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline void obj_cgroup_put(struct obj_cgroup *objcg)
|
|
{
|
|
}
|
|
|
|
static inline bool mem_cgroup_tryget(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,
|
|
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 void mem_cgroup_scan_tasks(struct mem_cgroup *memcg,
|
|
int (*fn)(struct task_struct *, void *), void *arg)
|
|
{
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
#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;
|
|
}
|
|
|
|
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 void folio_memcg_lock(struct folio *folio)
|
|
{
|
|
}
|
|
|
|
static inline void folio_memcg_unlock(struct folio *folio)
|
|
{
|
|
}
|
|
|
|
static inline bool mem_cgroup_trylock_pages(struct mem_cgroup *memcg)
|
|
{
|
|
/* to match folio_memcg_rcu() */
|
|
rcu_read_lock();
|
|
return true;
|
|
}
|
|
|
|
static inline void mem_cgroup_unlock_pages(void)
|
|
{
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
static inline void mem_cgroup_handle_over_high(gfp_t gfp_mask)
|
|
{
|
|
}
|
|
|
|
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 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 void mod_memcg_page_state(struct page *page,
|
|
int idx, int val)
|
|
{
|
|
}
|
|
|
|
static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
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 mem_cgroup_flush_stats(void)
|
|
{
|
|
}
|
|
|
|
static inline void mem_cgroup_flush_stats_ratelimited(void)
|
|
{
|
|
}
|
|
|
|
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 void count_memcg_events(struct mem_cgroup *memcg,
|
|
enum vm_event_item idx,
|
|
unsigned long count)
|
|
{
|
|
}
|
|
|
|
static inline void __count_memcg_events(struct mem_cgroup *memcg,
|
|
enum vm_event_item idx,
|
|
unsigned long count)
|
|
{
|
|
}
|
|
|
|
static inline void count_memcg_page_event(struct page *page,
|
|
int idx)
|
|
{
|
|
}
|
|
|
|
static inline void count_memcg_folio_events(struct folio *folio,
|
|
enum vm_event_item idx, unsigned long nr)
|
|
{
|
|
}
|
|
|
|
static inline
|
|
void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx)
|
|
{
|
|
}
|
|
|
|
static inline void split_page_memcg(struct page *head, unsigned int nr)
|
|
{
|
|
}
|
|
|
|
static inline
|
|
unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order,
|
|
gfp_t gfp_mask,
|
|
unsigned long *total_scanned)
|
|
{
|
|
return 0;
|
|
}
|
|
#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);
|
|
}
|
|
|
|
/* Test requires a stable page->memcg binding, see page_memcg() */
|
|
static inline bool folio_matches_lruvec(struct folio *folio,
|
|
struct lruvec *lruvec)
|
|
{
|
|
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 page's lruvec locked */
|
|
static inline struct lruvec *folio_lruvec_relock_irqsave(struct folio *folio,
|
|
struct lruvec *locked_lruvec, unsigned long *flags)
|
|
{
|
|
if (locked_lruvec) {
|
|
if (folio_matches_lruvec(folio, locked_lruvec))
|
|
return locked_lruvec;
|
|
|
|
unlock_page_lruvec_irqrestore(locked_lruvec, *flags);
|
|
}
|
|
|
|
return folio_lruvec_lock_irqsave(folio, 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 folio *folio,
|
|
struct bdi_writeback *wb);
|
|
|
|
static inline void mem_cgroup_track_foreign_dirty(struct folio *folio,
|
|
struct bdi_writeback *wb)
|
|
{
|
|
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);
|
|
}
|
|
|
|
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 folio *folio,
|
|
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,
|
|
gfp_t gfp_mask);
|
|
void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages);
|
|
#ifdef CONFIG_MEMCG
|
|
extern struct static_key_false memcg_sockets_enabled_key;
|
|
#define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key)
|
|
void mem_cgroup_sk_alloc(struct sock *sk);
|
|
void mem_cgroup_sk_free(struct sock *sk);
|
|
static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg)
|
|
{
|
|
if (!cgroup_subsys_on_dfl(memory_cgrp_subsys))
|
|
return !!memcg->tcpmem_pressure;
|
|
do {
|
|
if (time_before(jiffies, READ_ONCE(memcg->socket_pressure)))
|
|
return true;
|
|
} while ((memcg = parent_mem_cgroup(memcg)));
|
|
return false;
|
|
}
|
|
|
|
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);
|
|
#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 set_shrinker_bit(struct mem_cgroup *memcg,
|
|
int nid, int shrinker_id)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_MEMCG_KMEM
|
|
bool mem_cgroup_kmem_disabled(void);
|
|
int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, int order);
|
|
void __memcg_kmem_uncharge_page(struct page *page, int order);
|
|
|
|
struct obj_cgroup *get_obj_cgroup_from_current(void);
|
|
struct obj_cgroup *get_obj_cgroup_from_folio(struct folio *folio);
|
|
|
|
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)
|
|
{
|
|
return static_branch_likely(&memcg_bpf_enabled_key);
|
|
}
|
|
|
|
extern struct static_key_false memcg_kmem_online_key;
|
|
|
|
static inline bool memcg_kmem_online(void)
|
|
{
|
|
return static_branch_likely(&memcg_kmem_online_key);
|
|
}
|
|
|
|
static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp,
|
|
int order)
|
|
{
|
|
if (memcg_kmem_online())
|
|
return __memcg_kmem_charge_page(page, gfp, order);
|
|
return 0;
|
|
}
|
|
|
|
static inline void memcg_kmem_uncharge_page(struct page *page, int order)
|
|
{
|
|
if (memcg_kmem_online())
|
|
__memcg_kmem_uncharge_page(page, order);
|
|
}
|
|
|
|
/*
|
|
* A helper for accessing memcg's kmem_id, used for getting
|
|
* corresponding LRU lists.
|
|
*/
|
|
static inline int memcg_kmem_id(struct mem_cgroup *memcg)
|
|
{
|
|
return memcg ? memcg->kmemcg_id : -1;
|
|
}
|
|
|
|
struct mem_cgroup *mem_cgroup_from_obj(void *p);
|
|
struct mem_cgroup *mem_cgroup_from_slab_obj(void *p);
|
|
|
|
static inline void count_objcg_event(struct obj_cgroup *objcg,
|
|
enum vm_event_item idx)
|
|
{
|
|
struct mem_cgroup *memcg;
|
|
|
|
if (!memcg_kmem_online())
|
|
return;
|
|
|
|
rcu_read_lock();
|
|
memcg = obj_cgroup_memcg(objcg);
|
|
count_memcg_events(memcg, idx, 1);
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
#else
|
|
static inline bool mem_cgroup_kmem_disabled(void)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
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)
|
|
{
|
|
}
|
|
|
|
static inline struct obj_cgroup *get_obj_cgroup_from_folio(struct folio *folio)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline bool memcg_bpf_enabled(void)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline bool memcg_kmem_online(void)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline int memcg_kmem_id(struct mem_cgroup *memcg)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
static inline struct mem_cgroup *mem_cgroup_from_obj(void *p)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline struct mem_cgroup *mem_cgroup_from_slab_obj(void *p)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline void count_objcg_event(struct obj_cgroup *objcg,
|
|
enum vm_event_item idx)
|
|
{
|
|
}
|
|
|
|
#endif /* CONFIG_MEMCG_KMEM */
|
|
|
|
#if defined(CONFIG_MEMCG_KMEM) && 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);
|
|
#else
|
|
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)
|
|
{
|
|
}
|
|
static inline void obj_cgroup_uncharge_zswap(struct obj_cgroup *objcg,
|
|
size_t size)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
#endif /* _LINUX_MEMCONTROL_H */
|