Balbir Singh | 8cdea7c | 2008-02-07 00:13:50 -0800 | [diff] [blame] | 1 | /* memcontrol.h - Memory Controller |
| 2 | * |
| 3 | * Copyright IBM Corporation, 2007 |
| 4 | * Author Balbir Singh <balbir@linux.vnet.ibm.com> |
| 5 | * |
Pavel Emelianov | 78fb746 | 2008-02-07 00:13:51 -0800 | [diff] [blame] | 6 | * Copyright 2007 OpenVZ SWsoft Inc |
| 7 | * Author: Pavel Emelianov <xemul@openvz.org> |
| 8 | * |
Balbir Singh | 8cdea7c | 2008-02-07 00:13:50 -0800 | [diff] [blame] | 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | */ |
| 19 | |
| 20 | #ifndef _LINUX_MEMCONTROL_H |
| 21 | #define _LINUX_MEMCONTROL_H |
Hirokazu Takahashi | f8d66542 | 2009-01-07 18:08:02 -0800 | [diff] [blame] | 22 | #include <linux/cgroup.h> |
Ying Han | 456f998 | 2011-05-26 16:25:38 -0700 | [diff] [blame] | 23 | #include <linux/vm_event_item.h> |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 24 | #include <linux/hardirq.h> |
Glauber Costa | a8964b9 | 2012-12-18 14:22:09 -0800 | [diff] [blame] | 25 | #include <linux/jump_label.h> |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 26 | #include <linux/page_counter.h> |
| 27 | #include <linux/vmpressure.h> |
| 28 | #include <linux/eventfd.h> |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 29 | #include <linux/mm.h> |
| 30 | #include <linux/vmstat.h> |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 31 | #include <linux/writeback.h> |
Johannes Weiner | fdf1cdb | 2016-03-15 14:57:25 -0700 | [diff] [blame] | 32 | #include <linux/page-flags.h> |
Ying Han | 456f998 | 2011-05-26 16:25:38 -0700 | [diff] [blame] | 33 | |
Pavel Emelianov | 78fb746 | 2008-02-07 00:13:51 -0800 | [diff] [blame] | 34 | struct mem_cgroup; |
Balbir Singh | 8697d33 | 2008-02-07 00:13:59 -0800 | [diff] [blame] | 35 | struct page; |
| 36 | struct mm_struct; |
Glauber Costa | 2633d7a | 2012-12-18 14:22:34 -0800 | [diff] [blame] | 37 | struct kmem_cache; |
Pavel Emelianov | 78fb746 | 2008-02-07 00:13:51 -0800 | [diff] [blame] | 38 | |
Johannes Weiner | 71cd311 | 2017-05-03 14:55:13 -0700 | [diff] [blame] | 39 | /* Cgroup-specific page state, on top of universal node page state */ |
| 40 | enum memcg_stat_item { |
| 41 | MEMCG_CACHE = NR_VM_NODE_STAT_ITEMS, |
| 42 | MEMCG_RSS, |
| 43 | MEMCG_RSS_HUGE, |
| 44 | MEMCG_SWAP, |
| 45 | MEMCG_SOCK, |
| 46 | /* XXX: why are these zone and not node counters? */ |
| 47 | MEMCG_KERNEL_STACK_KB, |
Johannes Weiner | b2807f0 | 2016-01-20 15:03:22 -0800 | [diff] [blame] | 48 | MEMCG_NR_STAT, |
Greg Thelen | 2a7106f | 2011-01-13 15:47:37 -0800 | [diff] [blame] | 49 | }; |
| 50 | |
Johannes Weiner | e27be24 | 2018-04-10 16:29:45 -0700 | [diff] [blame^] | 51 | enum memcg_memory_event { |
| 52 | MEMCG_LOW, |
Johannes Weiner | 71cd311 | 2017-05-03 14:55:13 -0700 | [diff] [blame] | 53 | MEMCG_HIGH, |
| 54 | MEMCG_MAX, |
| 55 | MEMCG_OOM, |
Johannes Weiner | e27be24 | 2018-04-10 16:29:45 -0700 | [diff] [blame^] | 56 | MEMCG_NR_MEMORY_EVENTS, |
Johannes Weiner | 71cd311 | 2017-05-03 14:55:13 -0700 | [diff] [blame] | 57 | }; |
| 58 | |
Johannes Weiner | 5660048 | 2012-01-12 17:17:59 -0800 | [diff] [blame] | 59 | struct mem_cgroup_reclaim_cookie { |
Mel Gorman | ef8f232 | 2016-07-28 15:46:05 -0700 | [diff] [blame] | 60 | pg_data_t *pgdat; |
Johannes Weiner | 5660048 | 2012-01-12 17:17:59 -0800 | [diff] [blame] | 61 | int priority; |
| 62 | unsigned int generation; |
| 63 | }; |
| 64 | |
Johannes Weiner | 71cd311 | 2017-05-03 14:55:13 -0700 | [diff] [blame] | 65 | #ifdef CONFIG_MEMCG |
| 66 | |
| 67 | #define MEM_CGROUP_ID_SHIFT 16 |
| 68 | #define MEM_CGROUP_ID_MAX USHRT_MAX |
| 69 | |
| 70 | struct mem_cgroup_id { |
| 71 | int id; |
| 72 | atomic_t ref; |
| 73 | }; |
| 74 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 75 | /* |
| 76 | * Per memcg event counter is incremented at every pagein/pageout. With THP, |
| 77 | * it will be incremated by the number of pages. This counter is used for |
| 78 | * for trigger some periodic events. This is straightforward and better |
| 79 | * than using jiffies etc. to handle periodic memcg event. |
| 80 | */ |
| 81 | enum mem_cgroup_events_target { |
| 82 | MEM_CGROUP_TARGET_THRESH, |
| 83 | MEM_CGROUP_TARGET_SOFTLIMIT, |
| 84 | MEM_CGROUP_TARGET_NUMAINFO, |
| 85 | MEM_CGROUP_NTARGETS, |
| 86 | }; |
| 87 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 88 | struct mem_cgroup_stat_cpu { |
Johannes Weiner | b2807f0 | 2016-01-20 15:03:22 -0800 | [diff] [blame] | 89 | long count[MEMCG_NR_STAT]; |
Johannes Weiner | e27be24 | 2018-04-10 16:29:45 -0700 | [diff] [blame^] | 90 | unsigned long events[NR_VM_EVENT_ITEMS]; |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 91 | unsigned long nr_page_events; |
| 92 | unsigned long targets[MEM_CGROUP_NTARGETS]; |
| 93 | }; |
| 94 | |
| 95 | struct mem_cgroup_reclaim_iter { |
| 96 | struct mem_cgroup *position; |
| 97 | /* scan generation, increased every round-trip */ |
| 98 | unsigned int generation; |
| 99 | }; |
| 100 | |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 101 | struct lruvec_stat { |
| 102 | long count[NR_VM_NODE_STAT_ITEMS]; |
| 103 | }; |
| 104 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 105 | /* |
| 106 | * per-zone information in memory controller. |
| 107 | */ |
Mel Gorman | ef8f232 | 2016-07-28 15:46:05 -0700 | [diff] [blame] | 108 | struct mem_cgroup_per_node { |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 109 | struct lruvec lruvec; |
Johannes Weiner | a983b5e | 2018-01-31 16:16:45 -0800 | [diff] [blame] | 110 | |
| 111 | struct lruvec_stat __percpu *lruvec_stat_cpu; |
| 112 | atomic_long_t lruvec_stat[NR_VM_NODE_STAT_ITEMS]; |
| 113 | |
Michal Hocko | b4536f0c8 | 2017-01-10 16:58:04 -0800 | [diff] [blame] | 114 | unsigned long lru_zone_size[MAX_NR_ZONES][NR_LRU_LISTS]; |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 115 | |
| 116 | struct mem_cgroup_reclaim_iter iter[DEF_PRIORITY + 1]; |
| 117 | |
| 118 | struct rb_node tree_node; /* RB tree node */ |
| 119 | unsigned long usage_in_excess;/* Set to the value by which */ |
| 120 | /* the soft limit is exceeded*/ |
| 121 | bool on_tree; |
Andrey Ryabinin | e3c1ac5 | 2018-04-10 16:28:03 -0700 | [diff] [blame] | 122 | bool congested; /* memcg has many dirty pages */ |
| 123 | /* backed by a congested BDI */ |
| 124 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 125 | struct mem_cgroup *memcg; /* Back pointer, we cannot */ |
| 126 | /* use container_of */ |
| 127 | }; |
| 128 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 129 | struct mem_cgroup_threshold { |
| 130 | struct eventfd_ctx *eventfd; |
| 131 | unsigned long threshold; |
| 132 | }; |
| 133 | |
| 134 | /* For threshold */ |
| 135 | struct mem_cgroup_threshold_ary { |
| 136 | /* An array index points to threshold just below or equal to usage. */ |
| 137 | int current_threshold; |
| 138 | /* Size of entries[] */ |
| 139 | unsigned int size; |
| 140 | /* Array of thresholds */ |
| 141 | struct mem_cgroup_threshold entries[0]; |
| 142 | }; |
| 143 | |
| 144 | struct mem_cgroup_thresholds { |
| 145 | /* Primary thresholds array */ |
| 146 | struct mem_cgroup_threshold_ary *primary; |
| 147 | /* |
| 148 | * Spare threshold array. |
| 149 | * This is needed to make mem_cgroup_unregister_event() "never fail". |
| 150 | * It must be able to store at least primary->size - 1 entries. |
| 151 | */ |
| 152 | struct mem_cgroup_threshold_ary *spare; |
| 153 | }; |
| 154 | |
Johannes Weiner | 567e9ab | 2016-01-20 15:02:24 -0800 | [diff] [blame] | 155 | enum memcg_kmem_state { |
| 156 | KMEM_NONE, |
| 157 | KMEM_ALLOCATED, |
| 158 | KMEM_ONLINE, |
| 159 | }; |
| 160 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 161 | /* |
| 162 | * The memory controller data structure. The memory controller controls both |
| 163 | * page cache and RSS per cgroup. We would eventually like to provide |
| 164 | * statistics based on the statistics developed by Rik Van Riel for clock-pro, |
| 165 | * to help the administrator determine what knobs to tune. |
| 166 | */ |
| 167 | struct mem_cgroup { |
| 168 | struct cgroup_subsys_state css; |
| 169 | |
Johannes Weiner | 73f576c | 2016-07-20 15:44:57 -0700 | [diff] [blame] | 170 | /* Private memcg ID. Used to ID objects that outlive the cgroup */ |
| 171 | struct mem_cgroup_id id; |
| 172 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 173 | /* Accounted resources */ |
| 174 | struct page_counter memory; |
Vladimir Davydov | 37e8435 | 2016-01-20 15:02:56 -0800 | [diff] [blame] | 175 | struct page_counter swap; |
Johannes Weiner | 0db1529 | 2016-01-20 15:02:50 -0800 | [diff] [blame] | 176 | |
| 177 | /* Legacy consumer-oriented counters */ |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 178 | struct page_counter memsw; |
| 179 | struct page_counter kmem; |
Johannes Weiner | 0db1529 | 2016-01-20 15:02:50 -0800 | [diff] [blame] | 180 | struct page_counter tcpmem; |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 181 | |
| 182 | /* Normal memory consumption range */ |
| 183 | unsigned long low; |
| 184 | unsigned long high; |
| 185 | |
Johannes Weiner | f7e1cb6 | 2016-01-14 15:21:29 -0800 | [diff] [blame] | 186 | /* Range enforcement for interrupt charges */ |
| 187 | struct work_struct high_work; |
| 188 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 189 | unsigned long soft_limit; |
| 190 | |
| 191 | /* vmpressure notifications */ |
| 192 | struct vmpressure vmpressure; |
| 193 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 194 | /* |
| 195 | * Should the accounting and control be hierarchical, per subtree? |
| 196 | */ |
| 197 | bool use_hierarchy; |
| 198 | |
| 199 | /* protected by memcg_oom_lock */ |
| 200 | bool oom_lock; |
| 201 | int under_oom; |
| 202 | |
| 203 | int swappiness; |
| 204 | /* OOM-Killer disable */ |
| 205 | int oom_kill_disable; |
| 206 | |
Johannes Weiner | e27be24 | 2018-04-10 16:29:45 -0700 | [diff] [blame^] | 207 | /* memory.events */ |
| 208 | atomic_long_t memory_events[MEMCG_NR_MEMORY_EVENTS]; |
Tejun Heo | 472912a | 2015-09-18 18:01:59 -0400 | [diff] [blame] | 209 | struct cgroup_file events_file; |
| 210 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 211 | /* protect arrays of thresholds */ |
| 212 | struct mutex thresholds_lock; |
| 213 | |
| 214 | /* thresholds for memory usage. RCU-protected */ |
| 215 | struct mem_cgroup_thresholds thresholds; |
| 216 | |
| 217 | /* thresholds for mem+swap usage. RCU-protected */ |
| 218 | struct mem_cgroup_thresholds memsw_thresholds; |
| 219 | |
| 220 | /* For oom notifier event fd */ |
| 221 | struct list_head oom_notify; |
| 222 | |
| 223 | /* |
| 224 | * Should we move charges of a task when a task is moved into this |
| 225 | * mem_cgroup ? And what type of charges should we move ? |
| 226 | */ |
| 227 | unsigned long move_charge_at_immigrate; |
| 228 | /* |
| 229 | * set > 0 if pages under this cgroup are moving to other cgroup. |
| 230 | */ |
| 231 | atomic_t moving_account; |
| 232 | /* taken only while moving_account > 0 */ |
| 233 | spinlock_t move_lock; |
| 234 | struct task_struct *move_lock_task; |
| 235 | unsigned long move_lock_flags; |
Johannes Weiner | a983b5e | 2018-01-31 16:16:45 -0800 | [diff] [blame] | 236 | |
Johannes Weiner | e27be24 | 2018-04-10 16:29:45 -0700 | [diff] [blame^] | 237 | /* memory.stat */ |
Johannes Weiner | a983b5e | 2018-01-31 16:16:45 -0800 | [diff] [blame] | 238 | struct mem_cgroup_stat_cpu __percpu *stat_cpu; |
| 239 | atomic_long_t stat[MEMCG_NR_STAT]; |
Johannes Weiner | e27be24 | 2018-04-10 16:29:45 -0700 | [diff] [blame^] | 240 | atomic_long_t events[NR_VM_EVENT_ITEMS]; |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 241 | |
Johannes Weiner | d886f4e | 2016-01-20 15:02:47 -0800 | [diff] [blame] | 242 | unsigned long socket_pressure; |
| 243 | |
| 244 | /* Legacy tcp memory accounting */ |
Johannes Weiner | 0db1529 | 2016-01-20 15:02:50 -0800 | [diff] [blame] | 245 | bool tcpmem_active; |
| 246 | int tcpmem_pressure; |
Johannes Weiner | d886f4e | 2016-01-20 15:02:47 -0800 | [diff] [blame] | 247 | |
Johannes Weiner | 127424c | 2016-01-20 15:02:32 -0800 | [diff] [blame] | 248 | #ifndef CONFIG_SLOB |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 249 | /* Index in the kmem_cache->memcg_params.memcg_caches array */ |
| 250 | int kmemcg_id; |
Johannes Weiner | 567e9ab | 2016-01-20 15:02:24 -0800 | [diff] [blame] | 251 | enum memcg_kmem_state kmem_state; |
Tejun Heo | bc2791f | 2017-02-22 15:41:21 -0800 | [diff] [blame] | 252 | struct list_head kmem_caches; |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 253 | #endif |
| 254 | |
| 255 | int last_scanned_node; |
| 256 | #if MAX_NUMNODES > 1 |
| 257 | nodemask_t scan_nodes; |
| 258 | atomic_t numainfo_events; |
| 259 | atomic_t numainfo_updating; |
| 260 | #endif |
| 261 | |
| 262 | #ifdef CONFIG_CGROUP_WRITEBACK |
| 263 | struct list_head cgwb_list; |
| 264 | struct wb_domain cgwb_domain; |
| 265 | #endif |
| 266 | |
| 267 | /* List of events which userspace want to receive */ |
| 268 | struct list_head event_list; |
| 269 | spinlock_t event_list_lock; |
| 270 | |
| 271 | struct mem_cgroup_per_node *nodeinfo[0]; |
| 272 | /* WARNING: nodeinfo must be the last member here */ |
| 273 | }; |
Johannes Weiner | 7d82860 | 2016-01-14 15:20:56 -0800 | [diff] [blame] | 274 | |
Johannes Weiner | a983b5e | 2018-01-31 16:16:45 -0800 | [diff] [blame] | 275 | /* |
| 276 | * size of first charge trial. "32" comes from vmscan.c's magic value. |
| 277 | * TODO: maybe necessary to use big numbers in big irons. |
| 278 | */ |
| 279 | #define MEMCG_CHARGE_BATCH 32U |
| 280 | |
Johannes Weiner | 7d82860 | 2016-01-14 15:20:56 -0800 | [diff] [blame] | 281 | extern struct mem_cgroup *root_mem_cgroup; |
Tejun Heo | 5616163 | 2015-05-22 17:13:20 -0400 | [diff] [blame] | 282 | |
Johannes Weiner | 23047a9 | 2016-03-15 14:57:16 -0700 | [diff] [blame] | 283 | static inline bool mem_cgroup_disabled(void) |
| 284 | { |
| 285 | return !cgroup_subsys_enabled(memory_cgrp_subsys); |
| 286 | } |
| 287 | |
Johannes Weiner | 241994ed | 2015-02-11 15:26:06 -0800 | [diff] [blame] | 288 | bool mem_cgroup_low(struct mem_cgroup *root, struct mem_cgroup *memcg); |
| 289 | |
Johannes Weiner | 00501b5 | 2014-08-08 14:19:20 -0700 | [diff] [blame] | 290 | int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
Kirill A. Shutemov | f627c2f | 2016-01-15 16:52:20 -0800 | [diff] [blame] | 291 | gfp_t gfp_mask, struct mem_cgroup **memcgp, |
| 292 | bool compound); |
Johannes Weiner | 00501b5 | 2014-08-08 14:19:20 -0700 | [diff] [blame] | 293 | void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg, |
Kirill A. Shutemov | f627c2f | 2016-01-15 16:52:20 -0800 | [diff] [blame] | 294 | bool lrucare, bool compound); |
| 295 | void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg, |
| 296 | bool compound); |
Johannes Weiner | 0a31bc9 | 2014-08-08 14:19:22 -0700 | [diff] [blame] | 297 | void mem_cgroup_uncharge(struct page *page); |
Johannes Weiner | 747db95 | 2014-08-08 14:19:24 -0700 | [diff] [blame] | 298 | void mem_cgroup_uncharge_list(struct list_head *page_list); |
Johannes Weiner | 0a31bc9 | 2014-08-08 14:19:22 -0700 | [diff] [blame] | 299 | |
Johannes Weiner | 6a93ca8 | 2016-03-15 14:57:19 -0700 | [diff] [blame] | 300 | void mem_cgroup_migrate(struct page *oldpage, struct page *newpage); |
Johannes Weiner | 0a31bc9 | 2014-08-08 14:19:22 -0700 | [diff] [blame] | 301 | |
Mel Gorman | ef8f232 | 2016-07-28 15:46:05 -0700 | [diff] [blame] | 302 | static struct mem_cgroup_per_node * |
| 303 | mem_cgroup_nodeinfo(struct mem_cgroup *memcg, int nid) |
Johannes Weiner | 55779ec | 2016-07-28 15:45:10 -0700 | [diff] [blame] | 304 | { |
Mel Gorman | ef8f232 | 2016-07-28 15:46:05 -0700 | [diff] [blame] | 305 | return memcg->nodeinfo[nid]; |
Johannes Weiner | 55779ec | 2016-07-28 15:45:10 -0700 | [diff] [blame] | 306 | } |
| 307 | |
| 308 | /** |
Mel Gorman | a9dd0a8 | 2016-07-28 15:46:02 -0700 | [diff] [blame] | 309 | * mem_cgroup_lruvec - get the lru list vector for a node or a memcg zone |
| 310 | * @node: node of the wanted lruvec |
Johannes Weiner | 55779ec | 2016-07-28 15:45:10 -0700 | [diff] [blame] | 311 | * @memcg: memcg of the wanted lruvec |
| 312 | * |
Mel Gorman | a9dd0a8 | 2016-07-28 15:46:02 -0700 | [diff] [blame] | 313 | * Returns the lru list vector holding pages for a given @node or a given |
| 314 | * @memcg and @zone. This can be the node lruvec, if the memory controller |
Johannes Weiner | 55779ec | 2016-07-28 15:45:10 -0700 | [diff] [blame] | 315 | * is disabled. |
| 316 | */ |
Mel Gorman | a9dd0a8 | 2016-07-28 15:46:02 -0700 | [diff] [blame] | 317 | static inline struct lruvec *mem_cgroup_lruvec(struct pglist_data *pgdat, |
Mel Gorman | ef8f232 | 2016-07-28 15:46:05 -0700 | [diff] [blame] | 318 | struct mem_cgroup *memcg) |
Johannes Weiner | 55779ec | 2016-07-28 15:45:10 -0700 | [diff] [blame] | 319 | { |
Mel Gorman | ef8f232 | 2016-07-28 15:46:05 -0700 | [diff] [blame] | 320 | struct mem_cgroup_per_node *mz; |
Johannes Weiner | 55779ec | 2016-07-28 15:45:10 -0700 | [diff] [blame] | 321 | struct lruvec *lruvec; |
| 322 | |
| 323 | if (mem_cgroup_disabled()) { |
Mel Gorman | a9dd0a8 | 2016-07-28 15:46:02 -0700 | [diff] [blame] | 324 | lruvec = node_lruvec(pgdat); |
Johannes Weiner | 55779ec | 2016-07-28 15:45:10 -0700 | [diff] [blame] | 325 | goto out; |
| 326 | } |
| 327 | |
Mel Gorman | ef8f232 | 2016-07-28 15:46:05 -0700 | [diff] [blame] | 328 | mz = mem_cgroup_nodeinfo(memcg, pgdat->node_id); |
Johannes Weiner | 55779ec | 2016-07-28 15:45:10 -0700 | [diff] [blame] | 329 | lruvec = &mz->lruvec; |
| 330 | out: |
| 331 | /* |
| 332 | * Since a node can be onlined after the mem_cgroup was created, |
Mel Gorman | 599d0c9 | 2016-07-28 15:45:31 -0700 | [diff] [blame] | 333 | * we have to be prepared to initialize lruvec->pgdat here; |
Johannes Weiner | 55779ec | 2016-07-28 15:45:10 -0700 | [diff] [blame] | 334 | * and if offlined then reonlined, we need to reinitialize it. |
| 335 | */ |
Mel Gorman | ef8f232 | 2016-07-28 15:46:05 -0700 | [diff] [blame] | 336 | if (unlikely(lruvec->pgdat != pgdat)) |
| 337 | lruvec->pgdat = pgdat; |
Johannes Weiner | 55779ec | 2016-07-28 15:45:10 -0700 | [diff] [blame] | 338 | return lruvec; |
| 339 | } |
| 340 | |
Mel Gorman | 599d0c9 | 2016-07-28 15:45:31 -0700 | [diff] [blame] | 341 | struct lruvec *mem_cgroup_page_lruvec(struct page *, struct pglist_data *); |
KAMEZAWA Hiroyuki | 569b846 | 2009-12-15 16:47:03 -0800 | [diff] [blame] | 342 | |
Johannes Weiner | 2314b42 | 2014-12-10 15:44:33 -0800 | [diff] [blame] | 343 | bool task_in_mem_cgroup(struct task_struct *task, struct mem_cgroup *memcg); |
Michal Hocko | 6421999 | 2015-09-08 15:01:07 -0700 | [diff] [blame] | 344 | struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
Vladimir Davydov | e993d90 | 2015-09-09 15:35:35 -0700 | [diff] [blame] | 345 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 346 | static inline |
| 347 | struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){ |
| 348 | return css ? container_of(css, struct mem_cgroup, css) : NULL; |
| 349 | } |
| 350 | |
Johannes Weiner | 8e8ae64 | 2016-01-14 15:21:32 -0800 | [diff] [blame] | 351 | #define mem_cgroup_from_counter(counter, member) \ |
| 352 | container_of(counter, struct mem_cgroup, member) |
| 353 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 354 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
| 355 | struct mem_cgroup *, |
| 356 | struct mem_cgroup_reclaim_cookie *); |
| 357 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); |
Vladimir Davydov | 7c5f64f | 2016-10-07 16:57:23 -0700 | [diff] [blame] | 358 | int mem_cgroup_scan_tasks(struct mem_cgroup *, |
| 359 | int (*)(struct task_struct *, void *), void *); |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 360 | |
Johannes Weiner | 23047a9 | 2016-03-15 14:57:16 -0700 | [diff] [blame] | 361 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
| 362 | { |
| 363 | if (mem_cgroup_disabled()) |
| 364 | return 0; |
| 365 | |
Johannes Weiner | 73f576c | 2016-07-20 15:44:57 -0700 | [diff] [blame] | 366 | return memcg->id.id; |
Johannes Weiner | 23047a9 | 2016-03-15 14:57:16 -0700 | [diff] [blame] | 367 | } |
Johannes Weiner | 73f576c | 2016-07-20 15:44:57 -0700 | [diff] [blame] | 368 | struct mem_cgroup *mem_cgroup_from_id(unsigned short id); |
Johannes Weiner | 23047a9 | 2016-03-15 14:57:16 -0700 | [diff] [blame] | 369 | |
Roman Gushchin | 2262185 | 2017-07-06 15:40:25 -0700 | [diff] [blame] | 370 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
| 371 | { |
| 372 | struct mem_cgroup_per_node *mz; |
| 373 | |
| 374 | if (mem_cgroup_disabled()) |
| 375 | return NULL; |
| 376 | |
| 377 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); |
| 378 | return mz->memcg; |
| 379 | } |
| 380 | |
Johannes Weiner | 8e8ae64 | 2016-01-14 15:21:32 -0800 | [diff] [blame] | 381 | /** |
| 382 | * parent_mem_cgroup - find the accounting parent of a memcg |
| 383 | * @memcg: memcg whose parent to find |
| 384 | * |
| 385 | * Returns the parent memcg, or NULL if this is the root or the memory |
| 386 | * controller is in legacy no-hierarchy mode. |
| 387 | */ |
| 388 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) |
| 389 | { |
| 390 | if (!memcg->memory.parent) |
| 391 | return NULL; |
| 392 | return mem_cgroup_from_counter(memcg->memory.parent, memory); |
| 393 | } |
| 394 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 395 | static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, |
| 396 | struct mem_cgroup *root) |
| 397 | { |
| 398 | if (root == memcg) |
| 399 | return true; |
| 400 | if (!root->use_hierarchy) |
| 401 | return false; |
| 402 | return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup); |
| 403 | } |
Glauber Costa | e1aab16 | 2011-12-11 21:47:03 +0000 | [diff] [blame] | 404 | |
Johannes Weiner | 2314b42 | 2014-12-10 15:44:33 -0800 | [diff] [blame] | 405 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
| 406 | struct mem_cgroup *memcg) |
Lai Jiangshan | 2e4d409 | 2009-01-07 18:08:07 -0800 | [diff] [blame] | 407 | { |
Johannes Weiner | 587af30 | 2012-10-08 16:34:12 -0700 | [diff] [blame] | 408 | struct mem_cgroup *task_memcg; |
Johannes Weiner | 413918b | 2014-12-10 15:44:30 -0800 | [diff] [blame] | 409 | bool match = false; |
Johannes Weiner | c3ac9a8 | 2012-05-29 15:06:25 -0700 | [diff] [blame] | 410 | |
Lai Jiangshan | 2e4d409 | 2009-01-07 18:08:07 -0800 | [diff] [blame] | 411 | rcu_read_lock(); |
Johannes Weiner | 587af30 | 2012-10-08 16:34:12 -0700 | [diff] [blame] | 412 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
Johannes Weiner | 413918b | 2014-12-10 15:44:30 -0800 | [diff] [blame] | 413 | if (task_memcg) |
Johannes Weiner | 2314b42 | 2014-12-10 15:44:33 -0800 | [diff] [blame] | 414 | match = mem_cgroup_is_descendant(task_memcg, memcg); |
Lai Jiangshan | 2e4d409 | 2009-01-07 18:08:07 -0800 | [diff] [blame] | 415 | rcu_read_unlock(); |
Johannes Weiner | c3ac9a8 | 2012-05-29 15:06:25 -0700 | [diff] [blame] | 416 | return match; |
Lai Jiangshan | 2e4d409 | 2009-01-07 18:08:07 -0800 | [diff] [blame] | 417 | } |
Balbir Singh | 8a9f3cc | 2008-02-07 00:13:53 -0800 | [diff] [blame] | 418 | |
Michal Hocko | 6421999 | 2015-09-08 15:01:07 -0700 | [diff] [blame] | 419 | struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page); |
Vladimir Davydov | 2fc0452 | 2015-09-09 15:35:28 -0700 | [diff] [blame] | 420 | ino_t page_cgroup_ino(struct page *page); |
Wu Fengguang | d324236 | 2009-12-16 12:19:59 +0100 | [diff] [blame] | 421 | |
Vladimir Davydov | eb01aaa | 2016-01-20 15:03:02 -0800 | [diff] [blame] | 422 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
| 423 | { |
| 424 | if (mem_cgroup_disabled()) |
| 425 | return true; |
| 426 | return !!(memcg->css.flags & CSS_ONLINE); |
| 427 | } |
| 428 | |
KAMEZAWA Hiroyuki | 58ae83d | 2008-02-07 00:14:32 -0800 | [diff] [blame] | 429 | /* |
| 430 | * For memory reclaim. |
| 431 | */ |
Ying Han | 889976d | 2011-05-26 16:25:33 -0700 | [diff] [blame] | 432 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 433 | |
| 434 | void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, |
Michal Hocko | b4536f0c8 | 2017-01-10 16:58:04 -0800 | [diff] [blame] | 435 | int zid, int nr_pages); |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 436 | |
Vladimir Davydov | 0a6b76d | 2016-03-17 14:18:42 -0700 | [diff] [blame] | 437 | unsigned long mem_cgroup_node_nr_lru_pages(struct mem_cgroup *memcg, |
| 438 | int nid, unsigned int lru_mask); |
| 439 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 440 | static inline |
| 441 | unsigned long mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru) |
| 442 | { |
Mel Gorman | ef8f232 | 2016-07-28 15:46:05 -0700 | [diff] [blame] | 443 | struct mem_cgroup_per_node *mz; |
Michal Hocko | b4536f0c8 | 2017-01-10 16:58:04 -0800 | [diff] [blame] | 444 | unsigned long nr_pages = 0; |
| 445 | int zid; |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 446 | |
Mel Gorman | ef8f232 | 2016-07-28 15:46:05 -0700 | [diff] [blame] | 447 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); |
Michal Hocko | b4536f0c8 | 2017-01-10 16:58:04 -0800 | [diff] [blame] | 448 | for (zid = 0; zid < MAX_NR_ZONES; zid++) |
| 449 | nr_pages += mz->lru_zone_size[zid][lru]; |
| 450 | return nr_pages; |
| 451 | } |
| 452 | |
| 453 | static inline |
| 454 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, |
| 455 | enum lru_list lru, int zone_idx) |
| 456 | { |
| 457 | struct mem_cgroup_per_node *mz; |
| 458 | |
| 459 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); |
| 460 | return mz->lru_zone_size[zone_idx][lru]; |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 461 | } |
| 462 | |
Tejun Heo | b23afb9 | 2015-11-05 18:46:11 -0800 | [diff] [blame] | 463 | void mem_cgroup_handle_over_high(void); |
| 464 | |
Vladimir Davydov | 7c5f64f | 2016-10-07 16:57:23 -0700 | [diff] [blame] | 465 | unsigned long mem_cgroup_get_limit(struct mem_cgroup *memcg); |
| 466 | |
Michal Hocko | 6421999 | 2015-09-08 15:01:07 -0700 | [diff] [blame] | 467 | void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, |
| 468 | struct task_struct *p); |
KAMEZAWA Hiroyuki | 58ae83d | 2008-02-07 00:14:32 -0800 | [diff] [blame] | 469 | |
Johannes Weiner | 4942642 | 2013-10-16 13:46:59 -0700 | [diff] [blame] | 470 | static inline void mem_cgroup_oom_enable(void) |
Johannes Weiner | 519e524 | 2013-09-12 15:13:42 -0700 | [diff] [blame] | 471 | { |
Tejun Heo | 626ebc4 | 2015-11-05 18:46:09 -0800 | [diff] [blame] | 472 | WARN_ON(current->memcg_may_oom); |
| 473 | current->memcg_may_oom = 1; |
Johannes Weiner | 519e524 | 2013-09-12 15:13:42 -0700 | [diff] [blame] | 474 | } |
| 475 | |
Johannes Weiner | 4942642 | 2013-10-16 13:46:59 -0700 | [diff] [blame] | 476 | static inline void mem_cgroup_oom_disable(void) |
Johannes Weiner | 519e524 | 2013-09-12 15:13:42 -0700 | [diff] [blame] | 477 | { |
Tejun Heo | 626ebc4 | 2015-11-05 18:46:09 -0800 | [diff] [blame] | 478 | WARN_ON(!current->memcg_may_oom); |
| 479 | current->memcg_may_oom = 0; |
Johannes Weiner | 519e524 | 2013-09-12 15:13:42 -0700 | [diff] [blame] | 480 | } |
| 481 | |
Johannes Weiner | 3812c8c | 2013-09-12 15:13:44 -0700 | [diff] [blame] | 482 | static inline bool task_in_memcg_oom(struct task_struct *p) |
| 483 | { |
Tejun Heo | 626ebc4 | 2015-11-05 18:46:09 -0800 | [diff] [blame] | 484 | return p->memcg_in_oom; |
Johannes Weiner | 3812c8c | 2013-09-12 15:13:44 -0700 | [diff] [blame] | 485 | } |
| 486 | |
Johannes Weiner | 4942642 | 2013-10-16 13:46:59 -0700 | [diff] [blame] | 487 | bool mem_cgroup_oom_synchronize(bool wait); |
Johannes Weiner | 3812c8c | 2013-09-12 15:13:44 -0700 | [diff] [blame] | 488 | |
Andrew Morton | c255a45 | 2012-07-31 16:43:02 -0700 | [diff] [blame] | 489 | #ifdef CONFIG_MEMCG_SWAP |
KAMEZAWA Hiroyuki | c077719 | 2009-01-07 18:07:57 -0800 | [diff] [blame] | 490 | extern int do_swap_account; |
| 491 | #endif |
Hirokazu Takahashi | f8d66542 | 2009-01-07 18:08:02 -0800 | [diff] [blame] | 492 | |
Johannes Weiner | 739f79f | 2017-08-18 15:15:48 -0700 | [diff] [blame] | 493 | struct mem_cgroup *lock_page_memcg(struct page *page); |
| 494 | void __unlock_page_memcg(struct mem_cgroup *memcg); |
Johannes Weiner | 62cccb8 | 2016-03-15 14:57:22 -0700 | [diff] [blame] | 495 | void unlock_page_memcg(struct page *page); |
KAMEZAWA Hiroyuki | 89c06bd | 2012-03-21 16:34:25 -0700 | [diff] [blame] | 496 | |
Matthias Kaehlcke | 04fecbf | 2017-09-06 16:22:09 -0700 | [diff] [blame] | 497 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
Johannes Weiner | ccda7f4 | 2017-05-03 14:55:16 -0700 | [diff] [blame] | 498 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, |
Matthias Kaehlcke | 04fecbf | 2017-09-06 16:22:09 -0700 | [diff] [blame] | 499 | int idx) |
Johannes Weiner | 2a2e488 | 2017-05-03 14:55:03 -0700 | [diff] [blame] | 500 | { |
Johannes Weiner | a983b5e | 2018-01-31 16:16:45 -0800 | [diff] [blame] | 501 | long x = atomic_long_read(&memcg->stat[idx]); |
| 502 | #ifdef CONFIG_SMP |
| 503 | if (x < 0) |
| 504 | x = 0; |
| 505 | #endif |
| 506 | return x; |
Johannes Weiner | 2a2e488 | 2017-05-03 14:55:03 -0700 | [diff] [blame] | 507 | } |
| 508 | |
Matthias Kaehlcke | 04fecbf | 2017-09-06 16:22:09 -0700 | [diff] [blame] | 509 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 510 | static inline void __mod_memcg_state(struct mem_cgroup *memcg, |
Matthias Kaehlcke | 04fecbf | 2017-09-06 16:22:09 -0700 | [diff] [blame] | 511 | int idx, int val) |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 512 | { |
Johannes Weiner | a983b5e | 2018-01-31 16:16:45 -0800 | [diff] [blame] | 513 | long x; |
| 514 | |
| 515 | if (mem_cgroup_disabled()) |
| 516 | return; |
| 517 | |
| 518 | x = val + __this_cpu_read(memcg->stat_cpu->count[idx]); |
| 519 | if (unlikely(abs(x) > MEMCG_CHARGE_BATCH)) { |
| 520 | atomic_long_add(x, &memcg->stat[idx]); |
| 521 | x = 0; |
| 522 | } |
| 523 | __this_cpu_write(memcg->stat_cpu->count[idx], x); |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 524 | } |
| 525 | |
Matthias Kaehlcke | 04fecbf | 2017-09-06 16:22:09 -0700 | [diff] [blame] | 526 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
Johannes Weiner | ccda7f4 | 2017-05-03 14:55:16 -0700 | [diff] [blame] | 527 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
Matthias Kaehlcke | 04fecbf | 2017-09-06 16:22:09 -0700 | [diff] [blame] | 528 | int idx, int val) |
Johannes Weiner | 2a2e488 | 2017-05-03 14:55:03 -0700 | [diff] [blame] | 529 | { |
Johannes Weiner | c3cc391 | 2018-02-21 14:45:24 -0800 | [diff] [blame] | 530 | unsigned long flags; |
| 531 | |
| 532 | local_irq_save(flags); |
Johannes Weiner | a983b5e | 2018-01-31 16:16:45 -0800 | [diff] [blame] | 533 | __mod_memcg_state(memcg, idx, val); |
Johannes Weiner | c3cc391 | 2018-02-21 14:45:24 -0800 | [diff] [blame] | 534 | local_irq_restore(flags); |
Johannes Weiner | 2a2e488 | 2017-05-03 14:55:03 -0700 | [diff] [blame] | 535 | } |
| 536 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 537 | /** |
Johannes Weiner | ccda7f4 | 2017-05-03 14:55:16 -0700 | [diff] [blame] | 538 | * mod_memcg_page_state - update page state statistics |
Johannes Weiner | 62cccb8 | 2016-03-15 14:57:22 -0700 | [diff] [blame] | 539 | * @page: the page |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 540 | * @idx: page state item to account |
| 541 | * @val: number of pages (positive or negative) |
| 542 | * |
Johannes Weiner | fdf1cdb | 2016-03-15 14:57:25 -0700 | [diff] [blame] | 543 | * The @page must be locked or the caller must use lock_page_memcg() |
| 544 | * to prevent double accounting when the page is concurrently being |
| 545 | * moved to another memcg: |
Johannes Weiner | 81f8c3a | 2016-03-15 14:57:04 -0700 | [diff] [blame] | 546 | * |
Johannes Weiner | fdf1cdb | 2016-03-15 14:57:25 -0700 | [diff] [blame] | 547 | * lock_page(page) or lock_page_memcg(page) |
Johannes Weiner | 81f8c3a | 2016-03-15 14:57:04 -0700 | [diff] [blame] | 548 | * if (TestClearPageState(page)) |
Johannes Weiner | ccda7f4 | 2017-05-03 14:55:16 -0700 | [diff] [blame] | 549 | * mod_memcg_page_state(page, state, -1); |
Johannes Weiner | fdf1cdb | 2016-03-15 14:57:25 -0700 | [diff] [blame] | 550 | * unlock_page(page) or unlock_page_memcg(page) |
Johannes Weiner | 2a2e488 | 2017-05-03 14:55:03 -0700 | [diff] [blame] | 551 | * |
| 552 | * Kernel pages are an exception to this, since they'll never move. |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 553 | */ |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 554 | static inline void __mod_memcg_page_state(struct page *page, |
Matthias Kaehlcke | 04fecbf | 2017-09-06 16:22:09 -0700 | [diff] [blame] | 555 | int idx, int val) |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 556 | { |
| 557 | if (page->mem_cgroup) |
| 558 | __mod_memcg_state(page->mem_cgroup, idx, val); |
| 559 | } |
| 560 | |
Johannes Weiner | ccda7f4 | 2017-05-03 14:55:16 -0700 | [diff] [blame] | 561 | static inline void mod_memcg_page_state(struct page *page, |
Matthias Kaehlcke | 04fecbf | 2017-09-06 16:22:09 -0700 | [diff] [blame] | 562 | int idx, int val) |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 563 | { |
Johannes Weiner | 62cccb8 | 2016-03-15 14:57:22 -0700 | [diff] [blame] | 564 | if (page->mem_cgroup) |
Johannes Weiner | ccda7f4 | 2017-05-03 14:55:16 -0700 | [diff] [blame] | 565 | mod_memcg_state(page->mem_cgroup, idx, val); |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 566 | } |
| 567 | |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 568 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
| 569 | enum node_stat_item idx) |
Greg Thelen | 2a7106f | 2011-01-13 15:47:37 -0800 | [diff] [blame] | 570 | { |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 571 | struct mem_cgroup_per_node *pn; |
Johannes Weiner | a983b5e | 2018-01-31 16:16:45 -0800 | [diff] [blame] | 572 | long x; |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 573 | |
| 574 | if (mem_cgroup_disabled()) |
| 575 | return node_page_state(lruvec_pgdat(lruvec), idx); |
| 576 | |
| 577 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); |
Johannes Weiner | a983b5e | 2018-01-31 16:16:45 -0800 | [diff] [blame] | 578 | x = atomic_long_read(&pn->lruvec_stat[idx]); |
| 579 | #ifdef CONFIG_SMP |
| 580 | if (x < 0) |
| 581 | x = 0; |
| 582 | #endif |
| 583 | return x; |
Greg Thelen | 2a7106f | 2011-01-13 15:47:37 -0800 | [diff] [blame] | 584 | } |
| 585 | |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 586 | static inline void __mod_lruvec_state(struct lruvec *lruvec, |
| 587 | enum node_stat_item idx, int val) |
Greg Thelen | 2a7106f | 2011-01-13 15:47:37 -0800 | [diff] [blame] | 588 | { |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 589 | struct mem_cgroup_per_node *pn; |
Johannes Weiner | a983b5e | 2018-01-31 16:16:45 -0800 | [diff] [blame] | 590 | long x; |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 591 | |
Johannes Weiner | 2845426 | 2018-01-31 16:16:41 -0800 | [diff] [blame] | 592 | /* Update node */ |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 593 | __mod_node_page_state(lruvec_pgdat(lruvec), idx, val); |
Johannes Weiner | 2845426 | 2018-01-31 16:16:41 -0800 | [diff] [blame] | 594 | |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 595 | if (mem_cgroup_disabled()) |
| 596 | return; |
Johannes Weiner | 2845426 | 2018-01-31 16:16:41 -0800 | [diff] [blame] | 597 | |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 598 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); |
Johannes Weiner | 2845426 | 2018-01-31 16:16:41 -0800 | [diff] [blame] | 599 | |
| 600 | /* Update memcg */ |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 601 | __mod_memcg_state(pn->memcg, idx, val); |
Johannes Weiner | 2845426 | 2018-01-31 16:16:41 -0800 | [diff] [blame] | 602 | |
| 603 | /* Update lruvec */ |
Johannes Weiner | a983b5e | 2018-01-31 16:16:45 -0800 | [diff] [blame] | 604 | x = val + __this_cpu_read(pn->lruvec_stat_cpu->count[idx]); |
| 605 | if (unlikely(abs(x) > MEMCG_CHARGE_BATCH)) { |
| 606 | atomic_long_add(x, &pn->lruvec_stat[idx]); |
| 607 | x = 0; |
| 608 | } |
| 609 | __this_cpu_write(pn->lruvec_stat_cpu->count[idx], x); |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 610 | } |
| 611 | |
| 612 | static inline void mod_lruvec_state(struct lruvec *lruvec, |
| 613 | enum node_stat_item idx, int val) |
| 614 | { |
Johannes Weiner | c3cc391 | 2018-02-21 14:45:24 -0800 | [diff] [blame] | 615 | unsigned long flags; |
| 616 | |
| 617 | local_irq_save(flags); |
Johannes Weiner | 2845426 | 2018-01-31 16:16:41 -0800 | [diff] [blame] | 618 | __mod_lruvec_state(lruvec, idx, val); |
Johannes Weiner | c3cc391 | 2018-02-21 14:45:24 -0800 | [diff] [blame] | 619 | local_irq_restore(flags); |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 620 | } |
| 621 | |
| 622 | static inline void __mod_lruvec_page_state(struct page *page, |
| 623 | enum node_stat_item idx, int val) |
| 624 | { |
Johannes Weiner | 2845426 | 2018-01-31 16:16:41 -0800 | [diff] [blame] | 625 | pg_data_t *pgdat = page_pgdat(page); |
| 626 | struct lruvec *lruvec; |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 627 | |
Johannes Weiner | 2845426 | 2018-01-31 16:16:41 -0800 | [diff] [blame] | 628 | /* Untracked pages have no memcg, no lruvec. Update only the node */ |
| 629 | if (!page->mem_cgroup) { |
| 630 | __mod_node_page_state(pgdat, idx, val); |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 631 | return; |
Johannes Weiner | 2845426 | 2018-01-31 16:16:41 -0800 | [diff] [blame] | 632 | } |
| 633 | |
| 634 | lruvec = mem_cgroup_lruvec(pgdat, page->mem_cgroup); |
| 635 | __mod_lruvec_state(lruvec, idx, val); |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 636 | } |
| 637 | |
| 638 | static inline void mod_lruvec_page_state(struct page *page, |
| 639 | enum node_stat_item idx, int val) |
| 640 | { |
Johannes Weiner | c3cc391 | 2018-02-21 14:45:24 -0800 | [diff] [blame] | 641 | unsigned long flags; |
| 642 | |
| 643 | local_irq_save(flags); |
Johannes Weiner | 2845426 | 2018-01-31 16:16:41 -0800 | [diff] [blame] | 644 | __mod_lruvec_page_state(page, idx, val); |
Johannes Weiner | c3cc391 | 2018-02-21 14:45:24 -0800 | [diff] [blame] | 645 | local_irq_restore(flags); |
Greg Thelen | 2a7106f | 2011-01-13 15:47:37 -0800 | [diff] [blame] | 646 | } |
| 647 | |
Mel Gorman | ef8f232 | 2016-07-28 15:46:05 -0700 | [diff] [blame] | 648 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
Andrew Morton | 0608f43 | 2013-09-24 15:27:41 -0700 | [diff] [blame] | 649 | gfp_t gfp_mask, |
| 650 | unsigned long *total_scanned); |
David Rientjes | a63d83f | 2010-08-09 17:19:46 -0700 | [diff] [blame] | 651 | |
Johannes Weiner | c9019e9 | 2018-01-31 16:16:37 -0800 | [diff] [blame] | 652 | static inline void __count_memcg_events(struct mem_cgroup *memcg, |
Johannes Weiner | e27be24 | 2018-04-10 16:29:45 -0700 | [diff] [blame^] | 653 | enum vm_event_item idx, |
| 654 | unsigned long count) |
Johannes Weiner | c9019e9 | 2018-01-31 16:16:37 -0800 | [diff] [blame] | 655 | { |
Johannes Weiner | a983b5e | 2018-01-31 16:16:45 -0800 | [diff] [blame] | 656 | unsigned long x; |
| 657 | |
| 658 | if (mem_cgroup_disabled()) |
| 659 | return; |
| 660 | |
| 661 | x = count + __this_cpu_read(memcg->stat_cpu->events[idx]); |
| 662 | if (unlikely(x > MEMCG_CHARGE_BATCH)) { |
| 663 | atomic_long_add(x, &memcg->events[idx]); |
| 664 | x = 0; |
| 665 | } |
| 666 | __this_cpu_write(memcg->stat_cpu->events[idx], x); |
Johannes Weiner | c9019e9 | 2018-01-31 16:16:37 -0800 | [diff] [blame] | 667 | } |
| 668 | |
Roman Gushchin | 2262185 | 2017-07-06 15:40:25 -0700 | [diff] [blame] | 669 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
Johannes Weiner | e27be24 | 2018-04-10 16:29:45 -0700 | [diff] [blame^] | 670 | enum vm_event_item idx, |
| 671 | unsigned long count) |
Roman Gushchin | 2262185 | 2017-07-06 15:40:25 -0700 | [diff] [blame] | 672 | { |
Johannes Weiner | c3cc391 | 2018-02-21 14:45:24 -0800 | [diff] [blame] | 673 | unsigned long flags; |
| 674 | |
| 675 | local_irq_save(flags); |
Johannes Weiner | a983b5e | 2018-01-31 16:16:45 -0800 | [diff] [blame] | 676 | __count_memcg_events(memcg, idx, count); |
Johannes Weiner | c3cc391 | 2018-02-21 14:45:24 -0800 | [diff] [blame] | 677 | local_irq_restore(flags); |
Roman Gushchin | 2262185 | 2017-07-06 15:40:25 -0700 | [diff] [blame] | 678 | } |
| 679 | |
| 680 | static inline void count_memcg_page_event(struct page *page, |
Johannes Weiner | e27be24 | 2018-04-10 16:29:45 -0700 | [diff] [blame^] | 681 | enum vm_event_item idx) |
Roman Gushchin | 2262185 | 2017-07-06 15:40:25 -0700 | [diff] [blame] | 682 | { |
| 683 | if (page->mem_cgroup) |
| 684 | count_memcg_events(page->mem_cgroup, idx, 1); |
| 685 | } |
| 686 | |
| 687 | static inline void count_memcg_event_mm(struct mm_struct *mm, |
| 688 | enum vm_event_item idx) |
David Rientjes | 68ae564 | 2012-12-12 13:51:57 -0800 | [diff] [blame] | 689 | { |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 690 | struct mem_cgroup *memcg; |
| 691 | |
David Rientjes | 68ae564 | 2012-12-12 13:51:57 -0800 | [diff] [blame] | 692 | if (mem_cgroup_disabled()) |
| 693 | return; |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 694 | |
| 695 | rcu_read_lock(); |
| 696 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
Konstantin Khlebnikov | 8e675f7 | 2017-07-06 15:40:28 -0700 | [diff] [blame] | 697 | if (likely(memcg)) { |
Johannes Weiner | c9019e9 | 2018-01-31 16:16:37 -0800 | [diff] [blame] | 698 | count_memcg_events(memcg, idx, 1); |
Konstantin Khlebnikov | 8e675f7 | 2017-07-06 15:40:28 -0700 | [diff] [blame] | 699 | if (idx == OOM_KILL) |
| 700 | cgroup_file_notify(&memcg->events_file); |
| 701 | } |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 702 | rcu_read_unlock(); |
David Rientjes | 68ae564 | 2012-12-12 13:51:57 -0800 | [diff] [blame] | 703 | } |
Johannes Weiner | c9019e9 | 2018-01-31 16:16:37 -0800 | [diff] [blame] | 704 | |
Johannes Weiner | e27be24 | 2018-04-10 16:29:45 -0700 | [diff] [blame^] | 705 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
| 706 | enum memcg_memory_event event) |
Johannes Weiner | c9019e9 | 2018-01-31 16:16:37 -0800 | [diff] [blame] | 707 | { |
Johannes Weiner | e27be24 | 2018-04-10 16:29:45 -0700 | [diff] [blame^] | 708 | atomic_long_inc(&memcg->memory_events[event]); |
Johannes Weiner | c9019e9 | 2018-01-31 16:16:37 -0800 | [diff] [blame] | 709 | cgroup_file_notify(&memcg->events_file); |
| 710 | } |
| 711 | |
KAMEZAWA Hiroyuki | ca3e021 | 2011-01-20 14:44:24 -0800 | [diff] [blame] | 712 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
KAMEZAWA Hiroyuki | e94c8a9 | 2012-01-12 17:18:20 -0800 | [diff] [blame] | 713 | void mem_cgroup_split_huge_fixup(struct page *head); |
KAMEZAWA Hiroyuki | ca3e021 | 2011-01-20 14:44:24 -0800 | [diff] [blame] | 714 | #endif |
| 715 | |
Andrew Morton | c255a45 | 2012-07-31 16:43:02 -0700 | [diff] [blame] | 716 | #else /* CONFIG_MEMCG */ |
Johannes Weiner | 23047a9 | 2016-03-15 14:57:16 -0700 | [diff] [blame] | 717 | |
| 718 | #define MEM_CGROUP_ID_SHIFT 0 |
| 719 | #define MEM_CGROUP_ID_MAX 0 |
| 720 | |
KAMEZAWA Hiroyuki | 7a81b88 | 2009-01-07 18:07:48 -0800 | [diff] [blame] | 721 | struct mem_cgroup; |
| 722 | |
Johannes Weiner | 23047a9 | 2016-03-15 14:57:16 -0700 | [diff] [blame] | 723 | static inline bool mem_cgroup_disabled(void) |
| 724 | { |
| 725 | return true; |
| 726 | } |
| 727 | |
Johannes Weiner | e27be24 | 2018-04-10 16:29:45 -0700 | [diff] [blame^] | 728 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
| 729 | enum memcg_memory_event event) |
Johannes Weiner | 241994ed | 2015-02-11 15:26:06 -0800 | [diff] [blame] | 730 | { |
| 731 | } |
| 732 | |
| 733 | static inline bool mem_cgroup_low(struct mem_cgroup *root, |
| 734 | struct mem_cgroup *memcg) |
| 735 | { |
| 736 | return false; |
| 737 | } |
| 738 | |
Johannes Weiner | 00501b5 | 2014-08-08 14:19:20 -0700 | [diff] [blame] | 739 | static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
| 740 | gfp_t gfp_mask, |
Kirill A. Shutemov | f627c2f | 2016-01-15 16:52:20 -0800 | [diff] [blame] | 741 | struct mem_cgroup **memcgp, |
| 742 | bool compound) |
Balbir Singh | 8a9f3cc | 2008-02-07 00:13:53 -0800 | [diff] [blame] | 743 | { |
Johannes Weiner | 00501b5 | 2014-08-08 14:19:20 -0700 | [diff] [blame] | 744 | *memcgp = NULL; |
Balbir Singh | 8a9f3cc | 2008-02-07 00:13:53 -0800 | [diff] [blame] | 745 | return 0; |
| 746 | } |
| 747 | |
Johannes Weiner | 00501b5 | 2014-08-08 14:19:20 -0700 | [diff] [blame] | 748 | static inline void mem_cgroup_commit_charge(struct page *page, |
| 749 | struct mem_cgroup *memcg, |
Kirill A. Shutemov | f627c2f | 2016-01-15 16:52:20 -0800 | [diff] [blame] | 750 | bool lrucare, bool compound) |
KAMEZAWA Hiroyuki | 7a81b88 | 2009-01-07 18:07:48 -0800 | [diff] [blame] | 751 | { |
| 752 | } |
| 753 | |
Johannes Weiner | 00501b5 | 2014-08-08 14:19:20 -0700 | [diff] [blame] | 754 | static inline void mem_cgroup_cancel_charge(struct page *page, |
Kirill A. Shutemov | f627c2f | 2016-01-15 16:52:20 -0800 | [diff] [blame] | 755 | struct mem_cgroup *memcg, |
| 756 | bool compound) |
KAMEZAWA Hiroyuki | 7a81b88 | 2009-01-07 18:07:48 -0800 | [diff] [blame] | 757 | { |
| 758 | } |
| 759 | |
Johannes Weiner | 0a31bc9 | 2014-08-08 14:19:22 -0700 | [diff] [blame] | 760 | static inline void mem_cgroup_uncharge(struct page *page) |
| 761 | { |
| 762 | } |
| 763 | |
Johannes Weiner | 747db95 | 2014-08-08 14:19:24 -0700 | [diff] [blame] | 764 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
KAMEZAWA Hiroyuki | 569b846 | 2009-12-15 16:47:03 -0800 | [diff] [blame] | 765 | { |
| 766 | } |
| 767 | |
Johannes Weiner | 6a93ca8 | 2016-03-15 14:57:19 -0700 | [diff] [blame] | 768 | static inline void mem_cgroup_migrate(struct page *old, struct page *new) |
KAMEZAWA Hiroyuki | 69029cd | 2008-07-25 01:47:14 -0700 | [diff] [blame] | 769 | { |
| 770 | } |
| 771 | |
Mel Gorman | a9dd0a8 | 2016-07-28 15:46:02 -0700 | [diff] [blame] | 772 | static inline struct lruvec *mem_cgroup_lruvec(struct pglist_data *pgdat, |
Mel Gorman | ef8f232 | 2016-07-28 15:46:05 -0700 | [diff] [blame] | 773 | struct mem_cgroup *memcg) |
Johannes Weiner | 925b767 | 2012-01-12 17:18:15 -0800 | [diff] [blame] | 774 | { |
Mel Gorman | a9dd0a8 | 2016-07-28 15:46:02 -0700 | [diff] [blame] | 775 | return node_lruvec(pgdat); |
Johannes Weiner | 925b767 | 2012-01-12 17:18:15 -0800 | [diff] [blame] | 776 | } |
| 777 | |
Hugh Dickins | fa9add6 | 2012-05-29 15:07:09 -0700 | [diff] [blame] | 778 | static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, |
Mel Gorman | 599d0c9 | 2016-07-28 15:45:31 -0700 | [diff] [blame] | 779 | struct pglist_data *pgdat) |
Minchan Kim | 3f58a82 | 2011-03-22 16:32:53 -0700 | [diff] [blame] | 780 | { |
Mel Gorman | 599d0c9 | 2016-07-28 15:45:31 -0700 | [diff] [blame] | 781 | return &pgdat->lruvec; |
Balbir Singh | 66e1707 | 2008-02-07 00:13:56 -0800 | [diff] [blame] | 782 | } |
| 783 | |
Johannes Weiner | 587af30 | 2012-10-08 16:34:12 -0700 | [diff] [blame] | 784 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
Raghavendra K T | c0ff4b8 | 2011-11-02 13:38:15 -0700 | [diff] [blame] | 785 | struct mem_cgroup *memcg) |
Balbir Singh | bed7161 | 2008-02-07 00:14:01 -0800 | [diff] [blame] | 786 | { |
Johannes Weiner | 587af30 | 2012-10-08 16:34:12 -0700 | [diff] [blame] | 787 | return true; |
Balbir Singh | bed7161 | 2008-02-07 00:14:01 -0800 | [diff] [blame] | 788 | } |
| 789 | |
David Rientjes | ffbdccf | 2013-07-03 15:01:23 -0700 | [diff] [blame] | 790 | static inline bool task_in_mem_cgroup(struct task_struct *task, |
| 791 | const struct mem_cgroup *memcg) |
David Rientjes | 4c4a221 | 2008-02-07 00:14:06 -0800 | [diff] [blame] | 792 | { |
David Rientjes | ffbdccf | 2013-07-03 15:01:23 -0700 | [diff] [blame] | 793 | return true; |
David Rientjes | 4c4a221 | 2008-02-07 00:14:06 -0800 | [diff] [blame] | 794 | } |
| 795 | |
Johannes Weiner | 5660048 | 2012-01-12 17:17:59 -0800 | [diff] [blame] | 796 | static inline struct mem_cgroup * |
| 797 | mem_cgroup_iter(struct mem_cgroup *root, |
| 798 | struct mem_cgroup *prev, |
| 799 | struct mem_cgroup_reclaim_cookie *reclaim) |
| 800 | { |
| 801 | return NULL; |
| 802 | } |
| 803 | |
| 804 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, |
| 805 | struct mem_cgroup *prev) |
| 806 | { |
| 807 | } |
| 808 | |
Vladimir Davydov | 7c5f64f | 2016-10-07 16:57:23 -0700 | [diff] [blame] | 809 | static inline int mem_cgroup_scan_tasks(struct mem_cgroup *memcg, |
| 810 | int (*fn)(struct task_struct *, void *), void *arg) |
| 811 | { |
| 812 | return 0; |
| 813 | } |
| 814 | |
Johannes Weiner | 23047a9 | 2016-03-15 14:57:16 -0700 | [diff] [blame] | 815 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
Hirokazu Takahashi | f8d66542 | 2009-01-07 18:08:02 -0800 | [diff] [blame] | 816 | { |
Johannes Weiner | 23047a9 | 2016-03-15 14:57:16 -0700 | [diff] [blame] | 817 | return 0; |
| 818 | } |
| 819 | |
| 820 | static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id) |
| 821 | { |
| 822 | WARN_ON_ONCE(id); |
| 823 | /* XXX: This should always return root_mem_cgroup */ |
| 824 | return NULL; |
Hirokazu Takahashi | f8d66542 | 2009-01-07 18:08:02 -0800 | [diff] [blame] | 825 | } |
KAMEZAWA Hiroyuki | a636b32 | 2009-01-07 18:08:08 -0800 | [diff] [blame] | 826 | |
Roman Gushchin | 2262185 | 2017-07-06 15:40:25 -0700 | [diff] [blame] | 827 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
| 828 | { |
| 829 | return NULL; |
| 830 | } |
| 831 | |
Vladimir Davydov | eb01aaa | 2016-01-20 15:03:02 -0800 | [diff] [blame] | 832 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
KOSAKI Motohiro | 14797e2 | 2009-01-07 18:08:18 -0800 | [diff] [blame] | 833 | { |
Yaowei Bai | 13308ca | 2015-11-05 18:47:40 -0800 | [diff] [blame] | 834 | return true; |
KOSAKI Motohiro | 14797e2 | 2009-01-07 18:08:18 -0800 | [diff] [blame] | 835 | } |
| 836 | |
KOSAKI Motohiro | a3d8e05 | 2009-01-07 18:08:19 -0800 | [diff] [blame] | 837 | static inline unsigned long |
Hugh Dickins | 4d7dcca | 2012-05-29 15:07:08 -0700 | [diff] [blame] | 838 | mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru) |
KOSAKI Motohiro | a3d8e05 | 2009-01-07 18:08:19 -0800 | [diff] [blame] | 839 | { |
| 840 | return 0; |
| 841 | } |
Michal Hocko | b4536f0c8 | 2017-01-10 16:58:04 -0800 | [diff] [blame] | 842 | static inline |
| 843 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, |
| 844 | enum lru_list lru, int zone_idx) |
| 845 | { |
| 846 | return 0; |
| 847 | } |
KOSAKI Motohiro | a3d8e05 | 2009-01-07 18:08:19 -0800 | [diff] [blame] | 848 | |
Vladimir Davydov | 0a6b76d | 2016-03-17 14:18:42 -0700 | [diff] [blame] | 849 | static inline unsigned long |
| 850 | mem_cgroup_node_nr_lru_pages(struct mem_cgroup *memcg, |
| 851 | int nid, unsigned int lru_mask) |
| 852 | { |
| 853 | return 0; |
| 854 | } |
| 855 | |
Vladimir Davydov | 7c5f64f | 2016-10-07 16:57:23 -0700 | [diff] [blame] | 856 | static inline unsigned long mem_cgroup_get_limit(struct mem_cgroup *memcg) |
| 857 | { |
| 858 | return 0; |
| 859 | } |
| 860 | |
Balbir Singh | e222432 | 2009-04-02 16:57:39 -0700 | [diff] [blame] | 861 | static inline void |
| 862 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) |
| 863 | { |
| 864 | } |
| 865 | |
Johannes Weiner | 739f79f | 2017-08-18 15:15:48 -0700 | [diff] [blame] | 866 | static inline struct mem_cgroup *lock_page_memcg(struct page *page) |
| 867 | { |
| 868 | return NULL; |
| 869 | } |
| 870 | |
| 871 | static inline void __unlock_page_memcg(struct mem_cgroup *memcg) |
KAMEZAWA Hiroyuki | 89c06bd | 2012-03-21 16:34:25 -0700 | [diff] [blame] | 872 | { |
| 873 | } |
| 874 | |
Johannes Weiner | 62cccb8 | 2016-03-15 14:57:22 -0700 | [diff] [blame] | 875 | static inline void unlock_page_memcg(struct page *page) |
KAMEZAWA Hiroyuki | 89c06bd | 2012-03-21 16:34:25 -0700 | [diff] [blame] | 876 | { |
| 877 | } |
| 878 | |
Tejun Heo | b23afb9 | 2015-11-05 18:46:11 -0800 | [diff] [blame] | 879 | static inline void mem_cgroup_handle_over_high(void) |
| 880 | { |
| 881 | } |
| 882 | |
Johannes Weiner | 4942642 | 2013-10-16 13:46:59 -0700 | [diff] [blame] | 883 | static inline void mem_cgroup_oom_enable(void) |
Johannes Weiner | 519e524 | 2013-09-12 15:13:42 -0700 | [diff] [blame] | 884 | { |
| 885 | } |
| 886 | |
Johannes Weiner | 4942642 | 2013-10-16 13:46:59 -0700 | [diff] [blame] | 887 | static inline void mem_cgroup_oom_disable(void) |
Johannes Weiner | 519e524 | 2013-09-12 15:13:42 -0700 | [diff] [blame] | 888 | { |
| 889 | } |
| 890 | |
Johannes Weiner | 3812c8c | 2013-09-12 15:13:44 -0700 | [diff] [blame] | 891 | static inline bool task_in_memcg_oom(struct task_struct *p) |
| 892 | { |
| 893 | return false; |
| 894 | } |
| 895 | |
Johannes Weiner | 4942642 | 2013-10-16 13:46:59 -0700 | [diff] [blame] | 896 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
Johannes Weiner | 3812c8c | 2013-09-12 15:13:44 -0700 | [diff] [blame] | 897 | { |
| 898 | return false; |
| 899 | } |
| 900 | |
Johannes Weiner | ccda7f4 | 2017-05-03 14:55:16 -0700 | [diff] [blame] | 901 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, |
Matthias Kaehlcke | 04fecbf | 2017-09-06 16:22:09 -0700 | [diff] [blame] | 902 | int idx) |
Johannes Weiner | 2a2e488 | 2017-05-03 14:55:03 -0700 | [diff] [blame] | 903 | { |
| 904 | return 0; |
| 905 | } |
| 906 | |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 907 | static inline void __mod_memcg_state(struct mem_cgroup *memcg, |
Matthias Kaehlcke | 04fecbf | 2017-09-06 16:22:09 -0700 | [diff] [blame] | 908 | int idx, |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 909 | int nr) |
| 910 | { |
| 911 | } |
| 912 | |
Johannes Weiner | ccda7f4 | 2017-05-03 14:55:16 -0700 | [diff] [blame] | 913 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
Matthias Kaehlcke | 04fecbf | 2017-09-06 16:22:09 -0700 | [diff] [blame] | 914 | int idx, |
Johannes Weiner | ccda7f4 | 2017-05-03 14:55:16 -0700 | [diff] [blame] | 915 | int nr) |
Johannes Weiner | 2a2e488 | 2017-05-03 14:55:03 -0700 | [diff] [blame] | 916 | { |
| 917 | } |
| 918 | |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 919 | static inline void __mod_memcg_page_state(struct page *page, |
Matthias Kaehlcke | 04fecbf | 2017-09-06 16:22:09 -0700 | [diff] [blame] | 920 | int idx, |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 921 | int nr) |
Johannes Weiner | 2a2e488 | 2017-05-03 14:55:03 -0700 | [diff] [blame] | 922 | { |
| 923 | } |
| 924 | |
Johannes Weiner | ccda7f4 | 2017-05-03 14:55:16 -0700 | [diff] [blame] | 925 | static inline void mod_memcg_page_state(struct page *page, |
Matthias Kaehlcke | 04fecbf | 2017-09-06 16:22:09 -0700 | [diff] [blame] | 926 | int idx, |
Johannes Weiner | ccda7f4 | 2017-05-03 14:55:16 -0700 | [diff] [blame] | 927 | int nr) |
Johannes Weiner | 553af43 | 2017-03-31 15:11:50 -0700 | [diff] [blame] | 928 | { |
| 929 | } |
| 930 | |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 931 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
| 932 | enum node_stat_item idx) |
Greg Thelen | 2a7106f | 2011-01-13 15:47:37 -0800 | [diff] [blame] | 933 | { |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 934 | return node_page_state(lruvec_pgdat(lruvec), idx); |
Greg Thelen | 2a7106f | 2011-01-13 15:47:37 -0800 | [diff] [blame] | 935 | } |
| 936 | |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 937 | static inline void __mod_lruvec_state(struct lruvec *lruvec, |
| 938 | enum node_stat_item idx, int val) |
Balbir Singh | d69b042 | 2009-06-17 16:26:34 -0700 | [diff] [blame] | 939 | { |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 940 | __mod_node_page_state(lruvec_pgdat(lruvec), idx, val); |
| 941 | } |
| 942 | |
| 943 | static inline void mod_lruvec_state(struct lruvec *lruvec, |
| 944 | enum node_stat_item idx, int val) |
| 945 | { |
| 946 | mod_node_page_state(lruvec_pgdat(lruvec), idx, val); |
| 947 | } |
| 948 | |
| 949 | static inline void __mod_lruvec_page_state(struct page *page, |
| 950 | enum node_stat_item idx, int val) |
| 951 | { |
| 952 | __mod_node_page_state(page_pgdat(page), idx, val); |
| 953 | } |
| 954 | |
| 955 | static inline void mod_lruvec_page_state(struct page *page, |
| 956 | enum node_stat_item idx, int val) |
| 957 | { |
| 958 | mod_node_page_state(page_pgdat(page), idx, val); |
Balbir Singh | d69b042 | 2009-06-17 16:26:34 -0700 | [diff] [blame] | 959 | } |
| 960 | |
Balbir Singh | 4e41695 | 2009-09-23 15:56:39 -0700 | [diff] [blame] | 961 | static inline |
Mel Gorman | ef8f232 | 2016-07-28 15:46:05 -0700 | [diff] [blame] | 962 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
Andrew Morton | 0608f43 | 2013-09-24 15:27:41 -0700 | [diff] [blame] | 963 | gfp_t gfp_mask, |
| 964 | unsigned long *total_scanned) |
Balbir Singh | 4e41695 | 2009-09-23 15:56:39 -0700 | [diff] [blame] | 965 | { |
Andrew Morton | 0608f43 | 2013-09-24 15:27:41 -0700 | [diff] [blame] | 966 | return 0; |
Balbir Singh | 4e41695 | 2009-09-23 15:56:39 -0700 | [diff] [blame] | 967 | } |
| 968 | |
KAMEZAWA Hiroyuki | e94c8a9 | 2012-01-12 17:18:20 -0800 | [diff] [blame] | 969 | static inline void mem_cgroup_split_huge_fixup(struct page *head) |
KAMEZAWA Hiroyuki | ca3e021 | 2011-01-20 14:44:24 -0800 | [diff] [blame] | 970 | { |
| 971 | } |
| 972 | |
Roman Gushchin | 2262185 | 2017-07-06 15:40:25 -0700 | [diff] [blame] | 973 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
| 974 | enum vm_event_item idx, |
| 975 | unsigned long count) |
| 976 | { |
| 977 | } |
| 978 | |
| 979 | static inline void count_memcg_page_event(struct page *page, |
Matthias Kaehlcke | 04fecbf | 2017-09-06 16:22:09 -0700 | [diff] [blame] | 980 | int idx) |
Roman Gushchin | 2262185 | 2017-07-06 15:40:25 -0700 | [diff] [blame] | 981 | { |
| 982 | } |
| 983 | |
Ying Han | 456f998 | 2011-05-26 16:25:38 -0700 | [diff] [blame] | 984 | static inline |
Roman Gushchin | 2262185 | 2017-07-06 15:40:25 -0700 | [diff] [blame] | 985 | void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx) |
Ying Han | 456f998 | 2011-05-26 16:25:38 -0700 | [diff] [blame] | 986 | { |
| 987 | } |
Andrew Morton | c255a45 | 2012-07-31 16:43:02 -0700 | [diff] [blame] | 988 | #endif /* CONFIG_MEMCG */ |
Pavel Emelianov | 78fb746 | 2008-02-07 00:13:51 -0800 | [diff] [blame] | 989 | |
Matthias Kaehlcke | 04fecbf | 2017-09-06 16:22:09 -0700 | [diff] [blame] | 990 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 991 | static inline void __inc_memcg_state(struct mem_cgroup *memcg, |
Matthias Kaehlcke | 04fecbf | 2017-09-06 16:22:09 -0700 | [diff] [blame] | 992 | int idx) |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 993 | { |
| 994 | __mod_memcg_state(memcg, idx, 1); |
| 995 | } |
| 996 | |
Matthias Kaehlcke | 04fecbf | 2017-09-06 16:22:09 -0700 | [diff] [blame] | 997 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 998 | static inline void __dec_memcg_state(struct mem_cgroup *memcg, |
Matthias Kaehlcke | 04fecbf | 2017-09-06 16:22:09 -0700 | [diff] [blame] | 999 | int idx) |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 1000 | { |
| 1001 | __mod_memcg_state(memcg, idx, -1); |
| 1002 | } |
| 1003 | |
Matthias Kaehlcke | 04fecbf | 2017-09-06 16:22:09 -0700 | [diff] [blame] | 1004 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 1005 | static inline void __inc_memcg_page_state(struct page *page, |
Matthias Kaehlcke | 04fecbf | 2017-09-06 16:22:09 -0700 | [diff] [blame] | 1006 | int idx) |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 1007 | { |
| 1008 | __mod_memcg_page_state(page, idx, 1); |
| 1009 | } |
| 1010 | |
Matthias Kaehlcke | 04fecbf | 2017-09-06 16:22:09 -0700 | [diff] [blame] | 1011 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 1012 | static inline void __dec_memcg_page_state(struct page *page, |
Matthias Kaehlcke | 04fecbf | 2017-09-06 16:22:09 -0700 | [diff] [blame] | 1013 | int idx) |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 1014 | { |
| 1015 | __mod_memcg_page_state(page, idx, -1); |
| 1016 | } |
| 1017 | |
| 1018 | static inline void __inc_lruvec_state(struct lruvec *lruvec, |
| 1019 | enum node_stat_item idx) |
| 1020 | { |
| 1021 | __mod_lruvec_state(lruvec, idx, 1); |
| 1022 | } |
| 1023 | |
| 1024 | static inline void __dec_lruvec_state(struct lruvec *lruvec, |
| 1025 | enum node_stat_item idx) |
| 1026 | { |
| 1027 | __mod_lruvec_state(lruvec, idx, -1); |
| 1028 | } |
| 1029 | |
| 1030 | static inline void __inc_lruvec_page_state(struct page *page, |
| 1031 | enum node_stat_item idx) |
| 1032 | { |
| 1033 | __mod_lruvec_page_state(page, idx, 1); |
| 1034 | } |
| 1035 | |
| 1036 | static inline void __dec_lruvec_page_state(struct page *page, |
| 1037 | enum node_stat_item idx) |
| 1038 | { |
| 1039 | __mod_lruvec_page_state(page, idx, -1); |
| 1040 | } |
| 1041 | |
Matthias Kaehlcke | 04fecbf | 2017-09-06 16:22:09 -0700 | [diff] [blame] | 1042 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 1043 | static inline void inc_memcg_state(struct mem_cgroup *memcg, |
Matthias Kaehlcke | 04fecbf | 2017-09-06 16:22:09 -0700 | [diff] [blame] | 1044 | int idx) |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 1045 | { |
| 1046 | mod_memcg_state(memcg, idx, 1); |
| 1047 | } |
| 1048 | |
Matthias Kaehlcke | 04fecbf | 2017-09-06 16:22:09 -0700 | [diff] [blame] | 1049 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 1050 | static inline void dec_memcg_state(struct mem_cgroup *memcg, |
Matthias Kaehlcke | 04fecbf | 2017-09-06 16:22:09 -0700 | [diff] [blame] | 1051 | int idx) |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 1052 | { |
| 1053 | mod_memcg_state(memcg, idx, -1); |
| 1054 | } |
| 1055 | |
Matthias Kaehlcke | 04fecbf | 2017-09-06 16:22:09 -0700 | [diff] [blame] | 1056 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 1057 | static inline void inc_memcg_page_state(struct page *page, |
Matthias Kaehlcke | 04fecbf | 2017-09-06 16:22:09 -0700 | [diff] [blame] | 1058 | int idx) |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 1059 | { |
| 1060 | mod_memcg_page_state(page, idx, 1); |
| 1061 | } |
| 1062 | |
Matthias Kaehlcke | 04fecbf | 2017-09-06 16:22:09 -0700 | [diff] [blame] | 1063 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 1064 | static inline void dec_memcg_page_state(struct page *page, |
Matthias Kaehlcke | 04fecbf | 2017-09-06 16:22:09 -0700 | [diff] [blame] | 1065 | int idx) |
Johannes Weiner | 00f3ca2 | 2017-07-06 15:40:52 -0700 | [diff] [blame] | 1066 | { |
| 1067 | mod_memcg_page_state(page, idx, -1); |
| 1068 | } |
| 1069 | |
| 1070 | static inline void inc_lruvec_state(struct lruvec *lruvec, |
| 1071 | enum node_stat_item idx) |
| 1072 | { |
| 1073 | mod_lruvec_state(lruvec, idx, 1); |
| 1074 | } |
| 1075 | |
| 1076 | static inline void dec_lruvec_state(struct lruvec *lruvec, |
| 1077 | enum node_stat_item idx) |
| 1078 | { |
| 1079 | mod_lruvec_state(lruvec, idx, -1); |
| 1080 | } |
| 1081 | |
| 1082 | static inline void inc_lruvec_page_state(struct page *page, |
| 1083 | enum node_stat_item idx) |
| 1084 | { |
| 1085 | mod_lruvec_page_state(page, idx, 1); |
| 1086 | } |
| 1087 | |
| 1088 | static inline void dec_lruvec_page_state(struct page *page, |
| 1089 | enum node_stat_item idx) |
| 1090 | { |
| 1091 | mod_lruvec_page_state(page, idx, -1); |
| 1092 | } |
| 1093 | |
Tejun Heo | 52ebea7 | 2015-05-22 17:13:37 -0400 | [diff] [blame] | 1094 | #ifdef CONFIG_CGROUP_WRITEBACK |
Tejun Heo | 841710a | 2015-05-22 18:23:33 -0400 | [diff] [blame] | 1095 | |
Tejun Heo | 52ebea7 | 2015-05-22 17:13:37 -0400 | [diff] [blame] | 1096 | struct list_head *mem_cgroup_cgwb_list(struct mem_cgroup *memcg); |
Tejun Heo | 841710a | 2015-05-22 18:23:33 -0400 | [diff] [blame] | 1097 | struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb); |
Tejun Heo | c5edf9c | 2015-09-29 13:04:26 -0400 | [diff] [blame] | 1098 | void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages, |
| 1099 | unsigned long *pheadroom, unsigned long *pdirty, |
| 1100 | unsigned long *pwriteback); |
Tejun Heo | 841710a | 2015-05-22 18:23:33 -0400 | [diff] [blame] | 1101 | |
| 1102 | #else /* CONFIG_CGROUP_WRITEBACK */ |
| 1103 | |
| 1104 | static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb) |
| 1105 | { |
| 1106 | return NULL; |
| 1107 | } |
| 1108 | |
Tejun Heo | c2aa723 | 2015-05-22 18:23:35 -0400 | [diff] [blame] | 1109 | static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb, |
Tejun Heo | c5edf9c | 2015-09-29 13:04:26 -0400 | [diff] [blame] | 1110 | unsigned long *pfilepages, |
| 1111 | unsigned long *pheadroom, |
Tejun Heo | c2aa723 | 2015-05-22 18:23:35 -0400 | [diff] [blame] | 1112 | unsigned long *pdirty, |
| 1113 | unsigned long *pwriteback) |
| 1114 | { |
| 1115 | } |
| 1116 | |
Tejun Heo | 841710a | 2015-05-22 18:23:33 -0400 | [diff] [blame] | 1117 | #endif /* CONFIG_CGROUP_WRITEBACK */ |
Tejun Heo | 52ebea7 | 2015-05-22 17:13:37 -0400 | [diff] [blame] | 1118 | |
Glauber Costa | e1aab16 | 2011-12-11 21:47:03 +0000 | [diff] [blame] | 1119 | struct sock; |
Johannes Weiner | baac50b | 2016-01-14 15:21:17 -0800 | [diff] [blame] | 1120 | bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); |
| 1121 | void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); |
Johannes Weiner | d886f4e | 2016-01-20 15:02:47 -0800 | [diff] [blame] | 1122 | #ifdef CONFIG_MEMCG |
Johannes Weiner | ef12947 | 2016-01-14 15:21:34 -0800 | [diff] [blame] | 1123 | extern struct static_key_false memcg_sockets_enabled_key; |
| 1124 | #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key) |
Johannes Weiner | 2d75807 | 2016-10-07 17:00:58 -0700 | [diff] [blame] | 1125 | void mem_cgroup_sk_alloc(struct sock *sk); |
| 1126 | void mem_cgroup_sk_free(struct sock *sk); |
Johannes Weiner | baac50b | 2016-01-14 15:21:17 -0800 | [diff] [blame] | 1127 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
Johannes Weiner | e805605 | 2016-01-14 15:21:14 -0800 | [diff] [blame] | 1128 | { |
Johannes Weiner | 0db1529 | 2016-01-20 15:02:50 -0800 | [diff] [blame] | 1129 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && memcg->tcpmem_pressure) |
Johannes Weiner | 8e8ae64 | 2016-01-14 15:21:32 -0800 | [diff] [blame] | 1130 | return true; |
Johannes Weiner | 8e8ae64 | 2016-01-14 15:21:32 -0800 | [diff] [blame] | 1131 | do { |
| 1132 | if (time_before(jiffies, memcg->socket_pressure)) |
| 1133 | return true; |
| 1134 | } while ((memcg = parent_mem_cgroup(memcg))); |
| 1135 | return false; |
Johannes Weiner | e805605 | 2016-01-14 15:21:14 -0800 | [diff] [blame] | 1136 | } |
| 1137 | #else |
Johannes Weiner | 80e95fe | 2016-01-14 15:21:20 -0800 | [diff] [blame] | 1138 | #define mem_cgroup_sockets_enabled 0 |
Johannes Weiner | 2d75807 | 2016-10-07 17:00:58 -0700 | [diff] [blame] | 1139 | static inline void mem_cgroup_sk_alloc(struct sock *sk) { }; |
| 1140 | static inline void mem_cgroup_sk_free(struct sock *sk) { }; |
Johannes Weiner | baac50b | 2016-01-14 15:21:17 -0800 | [diff] [blame] | 1141 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
Johannes Weiner | e805605 | 2016-01-14 15:21:14 -0800 | [diff] [blame] | 1142 | { |
| 1143 | return false; |
| 1144 | } |
| 1145 | #endif |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 1146 | |
Vladimir Davydov | 4526477 | 2016-07-26 15:24:21 -0700 | [diff] [blame] | 1147 | struct kmem_cache *memcg_kmem_get_cache(struct kmem_cache *cachep); |
| 1148 | void memcg_kmem_put_cache(struct kmem_cache *cachep); |
| 1149 | int memcg_kmem_charge_memcg(struct page *page, gfp_t gfp, int order, |
| 1150 | struct mem_cgroup *memcg); |
| 1151 | int memcg_kmem_charge(struct page *page, gfp_t gfp, int order); |
| 1152 | void memcg_kmem_uncharge(struct page *page, int order); |
| 1153 | |
Johannes Weiner | 127424c | 2016-01-20 15:02:32 -0800 | [diff] [blame] | 1154 | #if defined(CONFIG_MEMCG) && !defined(CONFIG_SLOB) |
Johannes Weiner | ef12947 | 2016-01-14 15:21:34 -0800 | [diff] [blame] | 1155 | extern struct static_key_false memcg_kmem_enabled_key; |
Tejun Heo | 17cc4df | 2017-02-22 15:41:36 -0800 | [diff] [blame] | 1156 | extern struct workqueue_struct *memcg_kmem_cache_wq; |
Glauber Costa | 749c541 | 2012-12-18 14:23:01 -0800 | [diff] [blame] | 1157 | |
Vladimir Davydov | dbcf73e | 2015-02-12 14:58:57 -0800 | [diff] [blame] | 1158 | extern int memcg_nr_cache_ids; |
Michal Hocko | 6421999 | 2015-09-08 15:01:07 -0700 | [diff] [blame] | 1159 | void memcg_get_cache_ids(void); |
| 1160 | void memcg_put_cache_ids(void); |
Glauber Costa | ebe945c | 2012-12-18 14:23:10 -0800 | [diff] [blame] | 1161 | |
| 1162 | /* |
| 1163 | * Helper macro to loop through all memcg-specific caches. Callers must still |
| 1164 | * check if the cache is valid (it is either valid or NULL). |
| 1165 | * the slab_mutex must be held when looping through those caches |
| 1166 | */ |
Glauber Costa | 749c541 | 2012-12-18 14:23:01 -0800 | [diff] [blame] | 1167 | #define for_each_memcg_cache_index(_idx) \ |
Vladimir Davydov | dbcf73e | 2015-02-12 14:58:57 -0800 | [diff] [blame] | 1168 | for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++) |
Glauber Costa | 749c541 | 2012-12-18 14:23:01 -0800 | [diff] [blame] | 1169 | |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 1170 | static inline bool memcg_kmem_enabled(void) |
| 1171 | { |
Johannes Weiner | ef12947 | 2016-01-14 15:21:34 -0800 | [diff] [blame] | 1172 | return static_branch_unlikely(&memcg_kmem_enabled_key); |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 1173 | } |
| 1174 | |
| 1175 | /* |
Jesper Dangaard Brouer | 9f706d6 | 2016-03-15 14:54:03 -0700 | [diff] [blame] | 1176 | * helper for accessing a memcg's index. It will be used as an index in the |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 1177 | * child cache array in kmem_cache, and also to derive its name. This function |
| 1178 | * will return -1 when this is not a kmem-limited memcg. |
| 1179 | */ |
| 1180 | static inline int memcg_cache_id(struct mem_cgroup *memcg) |
| 1181 | { |
| 1182 | return memcg ? memcg->kmemcg_id : -1; |
| 1183 | } |
Vladimir Davydov | 5722d09 | 2014-04-07 15:39:24 -0700 | [diff] [blame] | 1184 | |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 1185 | #else |
Glauber Costa | 749c541 | 2012-12-18 14:23:01 -0800 | [diff] [blame] | 1186 | #define for_each_memcg_cache_index(_idx) \ |
| 1187 | for (; NULL; ) |
| 1188 | |
Glauber Costa | b9ce5ef | 2012-12-18 14:22:46 -0800 | [diff] [blame] | 1189 | static inline bool memcg_kmem_enabled(void) |
| 1190 | { |
| 1191 | return false; |
| 1192 | } |
| 1193 | |
Glauber Costa | 2633d7a | 2012-12-18 14:22:34 -0800 | [diff] [blame] | 1194 | static inline int memcg_cache_id(struct mem_cgroup *memcg) |
| 1195 | { |
| 1196 | return -1; |
| 1197 | } |
| 1198 | |
Vladimir Davydov | 05257a1 | 2015-02-12 14:59:01 -0800 | [diff] [blame] | 1199 | static inline void memcg_get_cache_ids(void) |
| 1200 | { |
| 1201 | } |
| 1202 | |
| 1203 | static inline void memcg_put_cache_ids(void) |
| 1204 | { |
| 1205 | } |
| 1206 | |
Johannes Weiner | 127424c | 2016-01-20 15:02:32 -0800 | [diff] [blame] | 1207 | #endif /* CONFIG_MEMCG && !CONFIG_SLOB */ |
| 1208 | |
Balbir Singh | 8cdea7c | 2008-02-07 00:13:50 -0800 | [diff] [blame] | 1209 | #endif /* _LINUX_MEMCONTROL_H */ |