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> |
| 29 | #include <linux/mmzone.h> |
| 30 | #include <linux/writeback.h> |
Ying Han | 456f998 | 2011-05-26 16:25:38 -0700 | [diff] [blame] | 31 | |
Pavel Emelianov | 78fb746 | 2008-02-07 00:13:51 -0800 | [diff] [blame] | 32 | struct mem_cgroup; |
Balbir Singh | 8697d33 | 2008-02-07 00:13:59 -0800 | [diff] [blame] | 33 | struct page; |
| 34 | struct mm_struct; |
Glauber Costa | 2633d7a | 2012-12-18 14:22:34 -0800 | [diff] [blame] | 35 | struct kmem_cache; |
Pavel Emelianov | 78fb746 | 2008-02-07 00:13:51 -0800 | [diff] [blame] | 36 | |
Sha Zhengju | 68b4876 | 2013-09-12 15:13:50 -0700 | [diff] [blame] | 37 | /* |
| 38 | * The corresponding mem_cgroup_stat_names is defined in mm/memcontrol.c, |
| 39 | * These two lists should keep in accord with each other. |
| 40 | */ |
| 41 | enum mem_cgroup_stat_index { |
| 42 | /* |
| 43 | * For MEM_CONTAINER_TYPE_ALL, usage = pagecache + rss. |
| 44 | */ |
| 45 | MEM_CGROUP_STAT_CACHE, /* # of pages charged as cache */ |
| 46 | MEM_CGROUP_STAT_RSS, /* # of pages charged as anon rss */ |
| 47 | MEM_CGROUP_STAT_RSS_HUGE, /* # of pages charged as anon huge */ |
| 48 | MEM_CGROUP_STAT_FILE_MAPPED, /* # of pages charged as file rss */ |
Greg Thelen | c4843a7 | 2015-05-22 17:13:16 -0400 | [diff] [blame] | 49 | MEM_CGROUP_STAT_DIRTY, /* # of dirty pages in page cache */ |
Sha Zhengju | 3ea67d0 | 2013-09-12 15:13:53 -0700 | [diff] [blame] | 50 | MEM_CGROUP_STAT_WRITEBACK, /* # of pages under writeback */ |
Sha Zhengju | 68b4876 | 2013-09-12 15:13:50 -0700 | [diff] [blame] | 51 | MEM_CGROUP_STAT_SWAP, /* # of pages, swapped out */ |
| 52 | MEM_CGROUP_STAT_NSTATS, |
Johannes Weiner | b2807f0 | 2016-01-20 15:03:22 -0800 | [diff] [blame] | 53 | /* default hierarchy stats */ |
| 54 | MEMCG_SOCK, |
| 55 | MEMCG_NR_STAT, |
Greg Thelen | 2a7106f | 2011-01-13 15:47:37 -0800 | [diff] [blame] | 56 | }; |
| 57 | |
Johannes Weiner | 5660048 | 2012-01-12 17:17:59 -0800 | [diff] [blame] | 58 | struct mem_cgroup_reclaim_cookie { |
| 59 | struct zone *zone; |
| 60 | int priority; |
| 61 | unsigned int generation; |
| 62 | }; |
| 63 | |
Johannes Weiner | 241994e | 2015-02-11 15:26:06 -0800 | [diff] [blame] | 64 | enum mem_cgroup_events_index { |
| 65 | MEM_CGROUP_EVENTS_PGPGIN, /* # of pages paged in */ |
| 66 | MEM_CGROUP_EVENTS_PGPGOUT, /* # of pages paged out */ |
| 67 | MEM_CGROUP_EVENTS_PGFAULT, /* # of page-faults */ |
| 68 | MEM_CGROUP_EVENTS_PGMAJFAULT, /* # of major page-faults */ |
| 69 | MEM_CGROUP_EVENTS_NSTATS, |
| 70 | /* default hierarchy events */ |
| 71 | MEMCG_LOW = MEM_CGROUP_EVENTS_NSTATS, |
| 72 | MEMCG_HIGH, |
| 73 | MEMCG_MAX, |
| 74 | MEMCG_OOM, |
| 75 | MEMCG_NR_EVENTS, |
| 76 | }; |
| 77 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 78 | /* |
| 79 | * Per memcg event counter is incremented at every pagein/pageout. With THP, |
| 80 | * it will be incremated by the number of pages. This counter is used for |
| 81 | * for trigger some periodic events. This is straightforward and better |
| 82 | * than using jiffies etc. to handle periodic memcg event. |
| 83 | */ |
| 84 | enum mem_cgroup_events_target { |
| 85 | MEM_CGROUP_TARGET_THRESH, |
| 86 | MEM_CGROUP_TARGET_SOFTLIMIT, |
| 87 | MEM_CGROUP_TARGET_NUMAINFO, |
| 88 | MEM_CGROUP_NTARGETS, |
| 89 | }; |
| 90 | |
Andrew Morton | c255a45 | 2012-07-31 16:43:02 -0700 | [diff] [blame] | 91 | #ifdef CONFIG_MEMCG |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 92 | struct mem_cgroup_stat_cpu { |
Johannes Weiner | b2807f0 | 2016-01-20 15:03:22 -0800 | [diff] [blame] | 93 | long count[MEMCG_NR_STAT]; |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 94 | unsigned long events[MEMCG_NR_EVENTS]; |
| 95 | unsigned long nr_page_events; |
| 96 | unsigned long targets[MEM_CGROUP_NTARGETS]; |
| 97 | }; |
| 98 | |
| 99 | struct mem_cgroup_reclaim_iter { |
| 100 | struct mem_cgroup *position; |
| 101 | /* scan generation, increased every round-trip */ |
| 102 | unsigned int generation; |
| 103 | }; |
| 104 | |
| 105 | /* |
| 106 | * per-zone information in memory controller. |
| 107 | */ |
| 108 | struct mem_cgroup_per_zone { |
| 109 | struct lruvec lruvec; |
| 110 | unsigned long lru_size[NR_LRU_LISTS]; |
| 111 | |
| 112 | struct mem_cgroup_reclaim_iter iter[DEF_PRIORITY + 1]; |
| 113 | |
| 114 | struct rb_node tree_node; /* RB tree node */ |
| 115 | unsigned long usage_in_excess;/* Set to the value by which */ |
| 116 | /* the soft limit is exceeded*/ |
| 117 | bool on_tree; |
| 118 | struct mem_cgroup *memcg; /* Back pointer, we cannot */ |
| 119 | /* use container_of */ |
| 120 | }; |
| 121 | |
| 122 | struct mem_cgroup_per_node { |
| 123 | struct mem_cgroup_per_zone zoneinfo[MAX_NR_ZONES]; |
| 124 | }; |
| 125 | |
| 126 | struct mem_cgroup_threshold { |
| 127 | struct eventfd_ctx *eventfd; |
| 128 | unsigned long threshold; |
| 129 | }; |
| 130 | |
| 131 | /* For threshold */ |
| 132 | struct mem_cgroup_threshold_ary { |
| 133 | /* An array index points to threshold just below or equal to usage. */ |
| 134 | int current_threshold; |
| 135 | /* Size of entries[] */ |
| 136 | unsigned int size; |
| 137 | /* Array of thresholds */ |
| 138 | struct mem_cgroup_threshold entries[0]; |
| 139 | }; |
| 140 | |
| 141 | struct mem_cgroup_thresholds { |
| 142 | /* Primary thresholds array */ |
| 143 | struct mem_cgroup_threshold_ary *primary; |
| 144 | /* |
| 145 | * Spare threshold array. |
| 146 | * This is needed to make mem_cgroup_unregister_event() "never fail". |
| 147 | * It must be able to store at least primary->size - 1 entries. |
| 148 | */ |
| 149 | struct mem_cgroup_threshold_ary *spare; |
| 150 | }; |
| 151 | |
Johannes Weiner | 567e9ab | 2016-01-20 15:02:24 -0800 | [diff] [blame] | 152 | enum memcg_kmem_state { |
| 153 | KMEM_NONE, |
| 154 | KMEM_ALLOCATED, |
| 155 | KMEM_ONLINE, |
| 156 | }; |
| 157 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 158 | /* |
| 159 | * The memory controller data structure. The memory controller controls both |
| 160 | * page cache and RSS per cgroup. We would eventually like to provide |
| 161 | * statistics based on the statistics developed by Rik Van Riel for clock-pro, |
| 162 | * to help the administrator determine what knobs to tune. |
| 163 | */ |
| 164 | struct mem_cgroup { |
| 165 | struct cgroup_subsys_state css; |
| 166 | |
| 167 | /* Accounted resources */ |
| 168 | struct page_counter memory; |
Vladimir Davydov | 37e8435 | 2016-01-20 15:02:56 -0800 | [diff] [blame] | 169 | struct page_counter swap; |
Johannes Weiner | 0db1529 | 2016-01-20 15:02:50 -0800 | [diff] [blame] | 170 | |
| 171 | /* Legacy consumer-oriented counters */ |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 172 | struct page_counter memsw; |
| 173 | struct page_counter kmem; |
Johannes Weiner | 0db1529 | 2016-01-20 15:02:50 -0800 | [diff] [blame] | 174 | struct page_counter tcpmem; |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 175 | |
| 176 | /* Normal memory consumption range */ |
| 177 | unsigned long low; |
| 178 | unsigned long high; |
| 179 | |
Johannes Weiner | f7e1cb6 | 2016-01-14 15:21:29 -0800 | [diff] [blame] | 180 | /* Range enforcement for interrupt charges */ |
| 181 | struct work_struct high_work; |
| 182 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 183 | unsigned long soft_limit; |
| 184 | |
| 185 | /* vmpressure notifications */ |
| 186 | struct vmpressure vmpressure; |
| 187 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 188 | /* |
| 189 | * Should the accounting and control be hierarchical, per subtree? |
| 190 | */ |
| 191 | bool use_hierarchy; |
| 192 | |
| 193 | /* protected by memcg_oom_lock */ |
| 194 | bool oom_lock; |
| 195 | int under_oom; |
| 196 | |
| 197 | int swappiness; |
| 198 | /* OOM-Killer disable */ |
| 199 | int oom_kill_disable; |
| 200 | |
Tejun Heo | 472912a | 2015-09-18 18:01:59 -0400 | [diff] [blame] | 201 | /* handle for "memory.events" */ |
| 202 | struct cgroup_file events_file; |
| 203 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 204 | /* protect arrays of thresholds */ |
| 205 | struct mutex thresholds_lock; |
| 206 | |
| 207 | /* thresholds for memory usage. RCU-protected */ |
| 208 | struct mem_cgroup_thresholds thresholds; |
| 209 | |
| 210 | /* thresholds for mem+swap usage. RCU-protected */ |
| 211 | struct mem_cgroup_thresholds memsw_thresholds; |
| 212 | |
| 213 | /* For oom notifier event fd */ |
| 214 | struct list_head oom_notify; |
| 215 | |
| 216 | /* |
| 217 | * Should we move charges of a task when a task is moved into this |
| 218 | * mem_cgroup ? And what type of charges should we move ? |
| 219 | */ |
| 220 | unsigned long move_charge_at_immigrate; |
| 221 | /* |
| 222 | * set > 0 if pages under this cgroup are moving to other cgroup. |
| 223 | */ |
| 224 | atomic_t moving_account; |
| 225 | /* taken only while moving_account > 0 */ |
| 226 | spinlock_t move_lock; |
| 227 | struct task_struct *move_lock_task; |
| 228 | unsigned long move_lock_flags; |
| 229 | /* |
| 230 | * percpu counter. |
| 231 | */ |
| 232 | struct mem_cgroup_stat_cpu __percpu *stat; |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 233 | |
Johannes Weiner | d886f4e | 2016-01-20 15:02:47 -0800 | [diff] [blame] | 234 | unsigned long socket_pressure; |
| 235 | |
| 236 | /* Legacy tcp memory accounting */ |
Johannes Weiner | 0db1529 | 2016-01-20 15:02:50 -0800 | [diff] [blame] | 237 | bool tcpmem_active; |
| 238 | int tcpmem_pressure; |
Johannes Weiner | d886f4e | 2016-01-20 15:02:47 -0800 | [diff] [blame] | 239 | |
Johannes Weiner | 127424c | 2016-01-20 15:02:32 -0800 | [diff] [blame] | 240 | #ifndef CONFIG_SLOB |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 241 | /* Index in the kmem_cache->memcg_params.memcg_caches array */ |
| 242 | int kmemcg_id; |
Johannes Weiner | 567e9ab | 2016-01-20 15:02:24 -0800 | [diff] [blame] | 243 | enum memcg_kmem_state kmem_state; |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 244 | #endif |
| 245 | |
| 246 | int last_scanned_node; |
| 247 | #if MAX_NUMNODES > 1 |
| 248 | nodemask_t scan_nodes; |
| 249 | atomic_t numainfo_events; |
| 250 | atomic_t numainfo_updating; |
| 251 | #endif |
| 252 | |
| 253 | #ifdef CONFIG_CGROUP_WRITEBACK |
| 254 | struct list_head cgwb_list; |
| 255 | struct wb_domain cgwb_domain; |
| 256 | #endif |
| 257 | |
| 258 | /* List of events which userspace want to receive */ |
| 259 | struct list_head event_list; |
| 260 | spinlock_t event_list_lock; |
| 261 | |
| 262 | struct mem_cgroup_per_node *nodeinfo[0]; |
| 263 | /* WARNING: nodeinfo must be the last member here */ |
| 264 | }; |
Johannes Weiner | 7d82860 | 2016-01-14 15:20:56 -0800 | [diff] [blame] | 265 | |
| 266 | extern struct mem_cgroup *root_mem_cgroup; |
Tejun Heo | 5616163 | 2015-05-22 17:13:20 -0400 | [diff] [blame] | 267 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 268 | /** |
| 269 | * mem_cgroup_events - count memory events against a cgroup |
| 270 | * @memcg: the memory cgroup |
| 271 | * @idx: the event index |
| 272 | * @nr: the number of events to account for |
| 273 | */ |
| 274 | static inline void mem_cgroup_events(struct mem_cgroup *memcg, |
Johannes Weiner | 241994e | 2015-02-11 15:26:06 -0800 | [diff] [blame] | 275 | enum mem_cgroup_events_index idx, |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 276 | unsigned int nr) |
| 277 | { |
| 278 | this_cpu_add(memcg->stat->events[idx], nr); |
Tejun Heo | 472912a | 2015-09-18 18:01:59 -0400 | [diff] [blame] | 279 | cgroup_file_notify(&memcg->events_file); |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 280 | } |
Johannes Weiner | 241994e | 2015-02-11 15:26:06 -0800 | [diff] [blame] | 281 | |
| 282 | bool mem_cgroup_low(struct mem_cgroup *root, struct mem_cgroup *memcg); |
| 283 | |
Johannes Weiner | 00501b5 | 2014-08-08 14:19:20 -0700 | [diff] [blame] | 284 | 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] | 285 | gfp_t gfp_mask, struct mem_cgroup **memcgp, |
| 286 | bool compound); |
Johannes Weiner | 00501b5 | 2014-08-08 14:19:20 -0700 | [diff] [blame] | 287 | 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] | 288 | bool lrucare, bool compound); |
| 289 | void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg, |
| 290 | bool compound); |
Johannes Weiner | 0a31bc9 | 2014-08-08 14:19:22 -0700 | [diff] [blame] | 291 | void mem_cgroup_uncharge(struct page *page); |
Johannes Weiner | 747db95 | 2014-08-08 14:19:24 -0700 | [diff] [blame] | 292 | void mem_cgroup_uncharge_list(struct list_head *page_list); |
Johannes Weiner | 0a31bc9 | 2014-08-08 14:19:22 -0700 | [diff] [blame] | 293 | |
Hugh Dickins | 45637ba | 2015-11-05 18:49:40 -0800 | [diff] [blame] | 294 | void mem_cgroup_replace_page(struct page *oldpage, struct page *newpage); |
Johannes Weiner | 0a31bc9 | 2014-08-08 14:19:22 -0700 | [diff] [blame] | 295 | |
Johannes Weiner | 925b767 | 2012-01-12 17:18:15 -0800 | [diff] [blame] | 296 | struct lruvec *mem_cgroup_zone_lruvec(struct zone *, struct mem_cgroup *); |
Hugh Dickins | fa9add6 | 2012-05-29 15:07:09 -0700 | [diff] [blame] | 297 | struct lruvec *mem_cgroup_page_lruvec(struct page *, struct zone *); |
KAMEZAWA Hiroyuki | 569b846 | 2009-12-15 16:47:03 -0800 | [diff] [blame] | 298 | |
Johannes Weiner | 2314b42 | 2014-12-10 15:44:33 -0800 | [diff] [blame] | 299 | 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] | 300 | struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
Vladimir Davydov | e993d90 | 2015-09-09 15:35:35 -0700 | [diff] [blame] | 301 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 302 | static inline |
| 303 | struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){ |
| 304 | return css ? container_of(css, struct mem_cgroup, css) : NULL; |
| 305 | } |
| 306 | |
Johannes Weiner | 8e8ae64 | 2016-01-14 15:21:32 -0800 | [diff] [blame] | 307 | #define mem_cgroup_from_counter(counter, member) \ |
| 308 | container_of(counter, struct mem_cgroup, member) |
| 309 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 310 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
| 311 | struct mem_cgroup *, |
| 312 | struct mem_cgroup_reclaim_cookie *); |
| 313 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); |
| 314 | |
Johannes Weiner | 8e8ae64 | 2016-01-14 15:21:32 -0800 | [diff] [blame] | 315 | /** |
| 316 | * parent_mem_cgroup - find the accounting parent of a memcg |
| 317 | * @memcg: memcg whose parent to find |
| 318 | * |
| 319 | * Returns the parent memcg, or NULL if this is the root or the memory |
| 320 | * controller is in legacy no-hierarchy mode. |
| 321 | */ |
| 322 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) |
| 323 | { |
| 324 | if (!memcg->memory.parent) |
| 325 | return NULL; |
| 326 | return mem_cgroup_from_counter(memcg->memory.parent, memory); |
| 327 | } |
| 328 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 329 | static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, |
| 330 | struct mem_cgroup *root) |
| 331 | { |
| 332 | if (root == memcg) |
| 333 | return true; |
| 334 | if (!root->use_hierarchy) |
| 335 | return false; |
| 336 | return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup); |
| 337 | } |
Glauber Costa | e1aab16 | 2011-12-11 21:47:03 +0000 | [diff] [blame] | 338 | |
Johannes Weiner | 2314b42 | 2014-12-10 15:44:33 -0800 | [diff] [blame] | 339 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
| 340 | struct mem_cgroup *memcg) |
Lai Jiangshan | 2e4d409 | 2009-01-07 18:08:07 -0800 | [diff] [blame] | 341 | { |
Johannes Weiner | 587af30 | 2012-10-08 16:34:12 -0700 | [diff] [blame] | 342 | struct mem_cgroup *task_memcg; |
Johannes Weiner | 413918b | 2014-12-10 15:44:30 -0800 | [diff] [blame] | 343 | bool match = false; |
Johannes Weiner | c3ac9a8 | 2012-05-29 15:06:25 -0700 | [diff] [blame] | 344 | |
Lai Jiangshan | 2e4d409 | 2009-01-07 18:08:07 -0800 | [diff] [blame] | 345 | rcu_read_lock(); |
Johannes Weiner | 587af30 | 2012-10-08 16:34:12 -0700 | [diff] [blame] | 346 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
Johannes Weiner | 413918b | 2014-12-10 15:44:30 -0800 | [diff] [blame] | 347 | if (task_memcg) |
Johannes Weiner | 2314b42 | 2014-12-10 15:44:33 -0800 | [diff] [blame] | 348 | match = mem_cgroup_is_descendant(task_memcg, memcg); |
Lai Jiangshan | 2e4d409 | 2009-01-07 18:08:07 -0800 | [diff] [blame] | 349 | rcu_read_unlock(); |
Johannes Weiner | c3ac9a8 | 2012-05-29 15:06:25 -0700 | [diff] [blame] | 350 | return match; |
Lai Jiangshan | 2e4d409 | 2009-01-07 18:08:07 -0800 | [diff] [blame] | 351 | } |
Balbir Singh | 8a9f3cc | 2008-02-07 00:13:53 -0800 | [diff] [blame] | 352 | |
Michal Hocko | 6421999 | 2015-09-08 15:01:07 -0700 | [diff] [blame] | 353 | struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page); |
Vladimir Davydov | 2fc0452 | 2015-09-09 15:35:28 -0700 | [diff] [blame] | 354 | ino_t page_cgroup_ino(struct page *page); |
Wu Fengguang | d324236 | 2009-12-16 12:19:59 +0100 | [diff] [blame] | 355 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 356 | static inline bool mem_cgroup_disabled(void) |
| 357 | { |
Tejun Heo | fc5ed1e | 2015-09-18 11:56:28 -0400 | [diff] [blame] | 358 | return !cgroup_subsys_enabled(memory_cgrp_subsys); |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 359 | } |
Johannes Weiner | 5660048 | 2012-01-12 17:17:59 -0800 | [diff] [blame] | 360 | |
Vladimir Davydov | eb01aaa | 2016-01-20 15:03:02 -0800 | [diff] [blame] | 361 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
| 362 | { |
| 363 | if (mem_cgroup_disabled()) |
| 364 | return true; |
| 365 | return !!(memcg->css.flags & CSS_ONLINE); |
| 366 | } |
| 367 | |
KAMEZAWA Hiroyuki | 58ae83d | 2008-02-07 00:14:32 -0800 | [diff] [blame] | 368 | /* |
| 369 | * For memory reclaim. |
| 370 | */ |
Ying Han | 889976d | 2011-05-26 16:25:33 -0700 | [diff] [blame] | 371 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 372 | |
| 373 | void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, |
| 374 | int nr_pages); |
| 375 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 376 | static inline |
| 377 | unsigned long mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru) |
| 378 | { |
| 379 | struct mem_cgroup_per_zone *mz; |
| 380 | |
| 381 | mz = container_of(lruvec, struct mem_cgroup_per_zone, lruvec); |
| 382 | return mz->lru_size[lru]; |
| 383 | } |
| 384 | |
Yaowei Bai | 13308ca | 2015-11-05 18:47:40 -0800 | [diff] [blame] | 385 | static inline bool mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec) |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 386 | { |
| 387 | unsigned long inactive_ratio; |
| 388 | unsigned long inactive; |
| 389 | unsigned long active; |
| 390 | unsigned long gb; |
| 391 | |
| 392 | inactive = mem_cgroup_get_lru_size(lruvec, LRU_INACTIVE_ANON); |
| 393 | active = mem_cgroup_get_lru_size(lruvec, LRU_ACTIVE_ANON); |
| 394 | |
| 395 | gb = (inactive + active) >> (30 - PAGE_SHIFT); |
| 396 | if (gb) |
| 397 | inactive_ratio = int_sqrt(10 * gb); |
| 398 | else |
| 399 | inactive_ratio = 1; |
| 400 | |
| 401 | return inactive * inactive_ratio < active; |
| 402 | } |
| 403 | |
Tejun Heo | b23afb9 | 2015-11-05 18:46:11 -0800 | [diff] [blame] | 404 | void mem_cgroup_handle_over_high(void); |
| 405 | |
Michal Hocko | 6421999 | 2015-09-08 15:01:07 -0700 | [diff] [blame] | 406 | void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, |
| 407 | struct task_struct *p); |
KAMEZAWA Hiroyuki | 58ae83d | 2008-02-07 00:14:32 -0800 | [diff] [blame] | 408 | |
Johannes Weiner | 4942642 | 2013-10-16 13:46:59 -0700 | [diff] [blame] | 409 | static inline void mem_cgroup_oom_enable(void) |
Johannes Weiner | 519e524 | 2013-09-12 15:13:42 -0700 | [diff] [blame] | 410 | { |
Tejun Heo | 626ebc4 | 2015-11-05 18:46:09 -0800 | [diff] [blame] | 411 | WARN_ON(current->memcg_may_oom); |
| 412 | current->memcg_may_oom = 1; |
Johannes Weiner | 519e524 | 2013-09-12 15:13:42 -0700 | [diff] [blame] | 413 | } |
| 414 | |
Johannes Weiner | 4942642 | 2013-10-16 13:46:59 -0700 | [diff] [blame] | 415 | static inline void mem_cgroup_oom_disable(void) |
Johannes Weiner | 519e524 | 2013-09-12 15:13:42 -0700 | [diff] [blame] | 416 | { |
Tejun Heo | 626ebc4 | 2015-11-05 18:46:09 -0800 | [diff] [blame] | 417 | WARN_ON(!current->memcg_may_oom); |
| 418 | current->memcg_may_oom = 0; |
Johannes Weiner | 519e524 | 2013-09-12 15:13:42 -0700 | [diff] [blame] | 419 | } |
| 420 | |
Johannes Weiner | 3812c8c | 2013-09-12 15:13:44 -0700 | [diff] [blame] | 421 | static inline bool task_in_memcg_oom(struct task_struct *p) |
| 422 | { |
Tejun Heo | 626ebc4 | 2015-11-05 18:46:09 -0800 | [diff] [blame] | 423 | return p->memcg_in_oom; |
Johannes Weiner | 3812c8c | 2013-09-12 15:13:44 -0700 | [diff] [blame] | 424 | } |
| 425 | |
Johannes Weiner | 4942642 | 2013-10-16 13:46:59 -0700 | [diff] [blame] | 426 | bool mem_cgroup_oom_synchronize(bool wait); |
Johannes Weiner | 3812c8c | 2013-09-12 15:13:44 -0700 | [diff] [blame] | 427 | |
Andrew Morton | c255a45 | 2012-07-31 16:43:02 -0700 | [diff] [blame] | 428 | #ifdef CONFIG_MEMCG_SWAP |
KAMEZAWA Hiroyuki | c077719 | 2009-01-07 18:07:57 -0800 | [diff] [blame] | 429 | extern int do_swap_account; |
| 430 | #endif |
Hirokazu Takahashi | f8d66542 | 2009-01-07 18:08:02 -0800 | [diff] [blame] | 431 | |
Johannes Weiner | 6de2261 | 2015-02-11 15:25:01 -0800 | [diff] [blame] | 432 | struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page); |
Johannes Weiner | 6de2261 | 2015-02-11 15:25:01 -0800 | [diff] [blame] | 433 | void mem_cgroup_end_page_stat(struct mem_cgroup *memcg); |
KAMEZAWA Hiroyuki | 89c06bd | 2012-03-21 16:34:25 -0700 | [diff] [blame] | 434 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 435 | /** |
| 436 | * mem_cgroup_update_page_stat - update page state statistics |
| 437 | * @memcg: memcg to account against |
| 438 | * @idx: page state item to account |
| 439 | * @val: number of pages (positive or negative) |
| 440 | * |
| 441 | * See mem_cgroup_begin_page_stat() for locking requirements. |
| 442 | */ |
| 443 | static inline void mem_cgroup_update_page_stat(struct mem_cgroup *memcg, |
| 444 | enum mem_cgroup_stat_index idx, int val) |
| 445 | { |
| 446 | VM_BUG_ON(!rcu_read_lock_held()); |
| 447 | |
| 448 | if (memcg) |
| 449 | this_cpu_add(memcg->stat->count[idx], val); |
| 450 | } |
| 451 | |
Johannes Weiner | d7365e7 | 2014-10-29 14:50:48 -0700 | [diff] [blame] | 452 | static inline void mem_cgroup_inc_page_stat(struct mem_cgroup *memcg, |
Sha Zhengju | 68b4876 | 2013-09-12 15:13:50 -0700 | [diff] [blame] | 453 | enum mem_cgroup_stat_index idx) |
Greg Thelen | 2a7106f | 2011-01-13 15:47:37 -0800 | [diff] [blame] | 454 | { |
Johannes Weiner | d7365e7 | 2014-10-29 14:50:48 -0700 | [diff] [blame] | 455 | mem_cgroup_update_page_stat(memcg, idx, 1); |
Greg Thelen | 2a7106f | 2011-01-13 15:47:37 -0800 | [diff] [blame] | 456 | } |
| 457 | |
Johannes Weiner | d7365e7 | 2014-10-29 14:50:48 -0700 | [diff] [blame] | 458 | static inline void mem_cgroup_dec_page_stat(struct mem_cgroup *memcg, |
Sha Zhengju | 68b4876 | 2013-09-12 15:13:50 -0700 | [diff] [blame] | 459 | enum mem_cgroup_stat_index idx) |
Greg Thelen | 2a7106f | 2011-01-13 15:47:37 -0800 | [diff] [blame] | 460 | { |
Johannes Weiner | d7365e7 | 2014-10-29 14:50:48 -0700 | [diff] [blame] | 461 | mem_cgroup_update_page_stat(memcg, idx, -1); |
Greg Thelen | 2a7106f | 2011-01-13 15:47:37 -0800 | [diff] [blame] | 462 | } |
| 463 | |
Andrew Morton | 0608f43 | 2013-09-24 15:27:41 -0700 | [diff] [blame] | 464 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
| 465 | gfp_t gfp_mask, |
| 466 | unsigned long *total_scanned); |
David Rientjes | a63d83f | 2010-08-09 17:19:46 -0700 | [diff] [blame] | 467 | |
David Rientjes | 68ae564 | 2012-12-12 13:51:57 -0800 | [diff] [blame] | 468 | static inline void mem_cgroup_count_vm_event(struct mm_struct *mm, |
| 469 | enum vm_event_item idx) |
| 470 | { |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 471 | struct mem_cgroup *memcg; |
| 472 | |
David Rientjes | 68ae564 | 2012-12-12 13:51:57 -0800 | [diff] [blame] | 473 | if (mem_cgroup_disabled()) |
| 474 | return; |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 475 | |
| 476 | rcu_read_lock(); |
| 477 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
| 478 | if (unlikely(!memcg)) |
| 479 | goto out; |
| 480 | |
| 481 | switch (idx) { |
| 482 | case PGFAULT: |
| 483 | this_cpu_inc(memcg->stat->events[MEM_CGROUP_EVENTS_PGFAULT]); |
| 484 | break; |
| 485 | case PGMAJFAULT: |
| 486 | this_cpu_inc(memcg->stat->events[MEM_CGROUP_EVENTS_PGMAJFAULT]); |
| 487 | break; |
| 488 | default: |
| 489 | BUG(); |
| 490 | } |
| 491 | out: |
| 492 | rcu_read_unlock(); |
David Rientjes | 68ae564 | 2012-12-12 13:51:57 -0800 | [diff] [blame] | 493 | } |
KAMEZAWA Hiroyuki | ca3e021 | 2011-01-20 14:44:24 -0800 | [diff] [blame] | 494 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
KAMEZAWA Hiroyuki | e94c8a9 | 2012-01-12 17:18:20 -0800 | [diff] [blame] | 495 | void mem_cgroup_split_huge_fixup(struct page *head); |
KAMEZAWA Hiroyuki | ca3e021 | 2011-01-20 14:44:24 -0800 | [diff] [blame] | 496 | #endif |
| 497 | |
Andrew Morton | c255a45 | 2012-07-31 16:43:02 -0700 | [diff] [blame] | 498 | #else /* CONFIG_MEMCG */ |
KAMEZAWA Hiroyuki | 7a81b88 | 2009-01-07 18:07:48 -0800 | [diff] [blame] | 499 | struct mem_cgroup; |
| 500 | |
Johannes Weiner | 241994e | 2015-02-11 15:26:06 -0800 | [diff] [blame] | 501 | static inline void mem_cgroup_events(struct mem_cgroup *memcg, |
| 502 | enum mem_cgroup_events_index idx, |
| 503 | unsigned int nr) |
| 504 | { |
| 505 | } |
| 506 | |
| 507 | static inline bool mem_cgroup_low(struct mem_cgroup *root, |
| 508 | struct mem_cgroup *memcg) |
| 509 | { |
| 510 | return false; |
| 511 | } |
| 512 | |
Johannes Weiner | 00501b5 | 2014-08-08 14:19:20 -0700 | [diff] [blame] | 513 | static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
| 514 | gfp_t gfp_mask, |
Kirill A. Shutemov | f627c2f | 2016-01-15 16:52:20 -0800 | [diff] [blame] | 515 | struct mem_cgroup **memcgp, |
| 516 | bool compound) |
Balbir Singh | 8a9f3cc | 2008-02-07 00:13:53 -0800 | [diff] [blame] | 517 | { |
Johannes Weiner | 00501b5 | 2014-08-08 14:19:20 -0700 | [diff] [blame] | 518 | *memcgp = NULL; |
Balbir Singh | 8a9f3cc | 2008-02-07 00:13:53 -0800 | [diff] [blame] | 519 | return 0; |
| 520 | } |
| 521 | |
Johannes Weiner | 00501b5 | 2014-08-08 14:19:20 -0700 | [diff] [blame] | 522 | static inline void mem_cgroup_commit_charge(struct page *page, |
| 523 | struct mem_cgroup *memcg, |
Kirill A. Shutemov | f627c2f | 2016-01-15 16:52:20 -0800 | [diff] [blame] | 524 | bool lrucare, bool compound) |
KAMEZAWA Hiroyuki | 7a81b88 | 2009-01-07 18:07:48 -0800 | [diff] [blame] | 525 | { |
| 526 | } |
| 527 | |
Johannes Weiner | 00501b5 | 2014-08-08 14:19:20 -0700 | [diff] [blame] | 528 | static inline void mem_cgroup_cancel_charge(struct page *page, |
Kirill A. Shutemov | f627c2f | 2016-01-15 16:52:20 -0800 | [diff] [blame] | 529 | struct mem_cgroup *memcg, |
| 530 | bool compound) |
KAMEZAWA Hiroyuki | 7a81b88 | 2009-01-07 18:07:48 -0800 | [diff] [blame] | 531 | { |
| 532 | } |
| 533 | |
Johannes Weiner | 0a31bc9 | 2014-08-08 14:19:22 -0700 | [diff] [blame] | 534 | static inline void mem_cgroup_uncharge(struct page *page) |
| 535 | { |
| 536 | } |
| 537 | |
Johannes Weiner | 747db95 | 2014-08-08 14:19:24 -0700 | [diff] [blame] | 538 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
KAMEZAWA Hiroyuki | 569b846 | 2009-12-15 16:47:03 -0800 | [diff] [blame] | 539 | { |
| 540 | } |
| 541 | |
Hugh Dickins | 45637ba | 2015-11-05 18:49:40 -0800 | [diff] [blame] | 542 | static inline void mem_cgroup_replace_page(struct page *old, struct page *new) |
KAMEZAWA Hiroyuki | 69029cd | 2008-07-25 01:47:14 -0700 | [diff] [blame] | 543 | { |
| 544 | } |
| 545 | |
Johannes Weiner | 925b767 | 2012-01-12 17:18:15 -0800 | [diff] [blame] | 546 | static inline struct lruvec *mem_cgroup_zone_lruvec(struct zone *zone, |
| 547 | struct mem_cgroup *memcg) |
| 548 | { |
| 549 | return &zone->lruvec; |
| 550 | } |
| 551 | |
Hugh Dickins | fa9add6 | 2012-05-29 15:07:09 -0700 | [diff] [blame] | 552 | static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, |
| 553 | struct zone *zone) |
Minchan Kim | 3f58a82 | 2011-03-22 16:32:53 -0700 | [diff] [blame] | 554 | { |
Johannes Weiner | 925b767 | 2012-01-12 17:18:15 -0800 | [diff] [blame] | 555 | return &zone->lruvec; |
Balbir Singh | 66e1707 | 2008-02-07 00:13:56 -0800 | [diff] [blame] | 556 | } |
| 557 | |
Johannes Weiner | 587af30 | 2012-10-08 16:34:12 -0700 | [diff] [blame] | 558 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
Raghavendra K T | c0ff4b8 | 2011-11-02 13:38:15 -0700 | [diff] [blame] | 559 | struct mem_cgroup *memcg) |
Balbir Singh | bed7161 | 2008-02-07 00:14:01 -0800 | [diff] [blame] | 560 | { |
Johannes Weiner | 587af30 | 2012-10-08 16:34:12 -0700 | [diff] [blame] | 561 | return true; |
Balbir Singh | bed7161 | 2008-02-07 00:14:01 -0800 | [diff] [blame] | 562 | } |
| 563 | |
David Rientjes | ffbdccf | 2013-07-03 15:01:23 -0700 | [diff] [blame] | 564 | static inline bool task_in_mem_cgroup(struct task_struct *task, |
| 565 | const struct mem_cgroup *memcg) |
David Rientjes | 4c4a221 | 2008-02-07 00:14:06 -0800 | [diff] [blame] | 566 | { |
David Rientjes | ffbdccf | 2013-07-03 15:01:23 -0700 | [diff] [blame] | 567 | return true; |
David Rientjes | 4c4a221 | 2008-02-07 00:14:06 -0800 | [diff] [blame] | 568 | } |
| 569 | |
Johannes Weiner | 5660048 | 2012-01-12 17:17:59 -0800 | [diff] [blame] | 570 | static inline struct mem_cgroup * |
| 571 | mem_cgroup_iter(struct mem_cgroup *root, |
| 572 | struct mem_cgroup *prev, |
| 573 | struct mem_cgroup_reclaim_cookie *reclaim) |
| 574 | { |
| 575 | return NULL; |
| 576 | } |
| 577 | |
| 578 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, |
| 579 | struct mem_cgroup *prev) |
| 580 | { |
| 581 | } |
| 582 | |
Hirokazu Takahashi | f8d66542 | 2009-01-07 18:08:02 -0800 | [diff] [blame] | 583 | static inline bool mem_cgroup_disabled(void) |
| 584 | { |
| 585 | return true; |
| 586 | } |
KAMEZAWA Hiroyuki | a636b32 | 2009-01-07 18:08:08 -0800 | [diff] [blame] | 587 | |
Vladimir Davydov | eb01aaa | 2016-01-20 15:03:02 -0800 | [diff] [blame] | 588 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
KOSAKI Motohiro | 14797e2 | 2009-01-07 18:08:18 -0800 | [diff] [blame] | 589 | { |
Yaowei Bai | 13308ca | 2015-11-05 18:47:40 -0800 | [diff] [blame] | 590 | return true; |
KOSAKI Motohiro | 14797e2 | 2009-01-07 18:08:18 -0800 | [diff] [blame] | 591 | } |
| 592 | |
Vladimir Davydov | eb01aaa | 2016-01-20 15:03:02 -0800 | [diff] [blame] | 593 | static inline bool |
| 594 | mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec) |
Vladimir Davydov | 90cbc25 | 2015-02-11 15:25:55 -0800 | [diff] [blame] | 595 | { |
| 596 | return true; |
| 597 | } |
| 598 | |
KOSAKI Motohiro | a3d8e05 | 2009-01-07 18:08:19 -0800 | [diff] [blame] | 599 | static inline unsigned long |
Hugh Dickins | 4d7dcca | 2012-05-29 15:07:08 -0700 | [diff] [blame] | 600 | mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru) |
KOSAKI Motohiro | a3d8e05 | 2009-01-07 18:08:19 -0800 | [diff] [blame] | 601 | { |
| 602 | return 0; |
| 603 | } |
| 604 | |
Hugh Dickins | fa9add6 | 2012-05-29 15:07:09 -0700 | [diff] [blame] | 605 | static inline void |
| 606 | mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, |
| 607 | int increment) |
KOSAKI Motohiro | 3e2f41f | 2009-01-07 18:08:20 -0800 | [diff] [blame] | 608 | { |
KOSAKI Motohiro | 3e2f41f | 2009-01-07 18:08:20 -0800 | [diff] [blame] | 609 | } |
| 610 | |
Balbir Singh | e222432 | 2009-04-02 16:57:39 -0700 | [diff] [blame] | 611 | static inline void |
| 612 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) |
| 613 | { |
| 614 | } |
| 615 | |
Johannes Weiner | 6de2261 | 2015-02-11 15:25:01 -0800 | [diff] [blame] | 616 | static inline struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page) |
KAMEZAWA Hiroyuki | 89c06bd | 2012-03-21 16:34:25 -0700 | [diff] [blame] | 617 | { |
Johannes Weiner | d7365e7 | 2014-10-29 14:50:48 -0700 | [diff] [blame] | 618 | return NULL; |
KAMEZAWA Hiroyuki | 89c06bd | 2012-03-21 16:34:25 -0700 | [diff] [blame] | 619 | } |
| 620 | |
Johannes Weiner | 6de2261 | 2015-02-11 15:25:01 -0800 | [diff] [blame] | 621 | static inline void mem_cgroup_end_page_stat(struct mem_cgroup *memcg) |
KAMEZAWA Hiroyuki | 89c06bd | 2012-03-21 16:34:25 -0700 | [diff] [blame] | 622 | { |
| 623 | } |
| 624 | |
Tejun Heo | b23afb9 | 2015-11-05 18:46:11 -0800 | [diff] [blame] | 625 | static inline void mem_cgroup_handle_over_high(void) |
| 626 | { |
| 627 | } |
| 628 | |
Johannes Weiner | 4942642 | 2013-10-16 13:46:59 -0700 | [diff] [blame] | 629 | static inline void mem_cgroup_oom_enable(void) |
Johannes Weiner | 519e524 | 2013-09-12 15:13:42 -0700 | [diff] [blame] | 630 | { |
| 631 | } |
| 632 | |
Johannes Weiner | 4942642 | 2013-10-16 13:46:59 -0700 | [diff] [blame] | 633 | static inline void mem_cgroup_oom_disable(void) |
Johannes Weiner | 519e524 | 2013-09-12 15:13:42 -0700 | [diff] [blame] | 634 | { |
| 635 | } |
| 636 | |
Johannes Weiner | 3812c8c | 2013-09-12 15:13:44 -0700 | [diff] [blame] | 637 | static inline bool task_in_memcg_oom(struct task_struct *p) |
| 638 | { |
| 639 | return false; |
| 640 | } |
| 641 | |
Johannes Weiner | 4942642 | 2013-10-16 13:46:59 -0700 | [diff] [blame] | 642 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
Johannes Weiner | 3812c8c | 2013-09-12 15:13:44 -0700 | [diff] [blame] | 643 | { |
| 644 | return false; |
| 645 | } |
| 646 | |
Johannes Weiner | d7365e7 | 2014-10-29 14:50:48 -0700 | [diff] [blame] | 647 | static inline void mem_cgroup_inc_page_stat(struct mem_cgroup *memcg, |
Sha Zhengju | 68b4876 | 2013-09-12 15:13:50 -0700 | [diff] [blame] | 648 | enum mem_cgroup_stat_index idx) |
Greg Thelen | 2a7106f | 2011-01-13 15:47:37 -0800 | [diff] [blame] | 649 | { |
| 650 | } |
| 651 | |
Johannes Weiner | d7365e7 | 2014-10-29 14:50:48 -0700 | [diff] [blame] | 652 | static inline void mem_cgroup_dec_page_stat(struct mem_cgroup *memcg, |
Sha Zhengju | 68b4876 | 2013-09-12 15:13:50 -0700 | [diff] [blame] | 653 | enum mem_cgroup_stat_index idx) |
Balbir Singh | d69b042 | 2009-06-17 16:26:34 -0700 | [diff] [blame] | 654 | { |
| 655 | } |
| 656 | |
Balbir Singh | 4e41695 | 2009-09-23 15:56:39 -0700 | [diff] [blame] | 657 | static inline |
Andrew Morton | 0608f43 | 2013-09-24 15:27:41 -0700 | [diff] [blame] | 658 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
| 659 | gfp_t gfp_mask, |
| 660 | unsigned long *total_scanned) |
Balbir Singh | 4e41695 | 2009-09-23 15:56:39 -0700 | [diff] [blame] | 661 | { |
Andrew Morton | 0608f43 | 2013-09-24 15:27:41 -0700 | [diff] [blame] | 662 | return 0; |
Balbir Singh | 4e41695 | 2009-09-23 15:56:39 -0700 | [diff] [blame] | 663 | } |
| 664 | |
KAMEZAWA Hiroyuki | e94c8a9 | 2012-01-12 17:18:20 -0800 | [diff] [blame] | 665 | static inline void mem_cgroup_split_huge_fixup(struct page *head) |
KAMEZAWA Hiroyuki | ca3e021 | 2011-01-20 14:44:24 -0800 | [diff] [blame] | 666 | { |
| 667 | } |
| 668 | |
Ying Han | 456f998 | 2011-05-26 16:25:38 -0700 | [diff] [blame] | 669 | static inline |
| 670 | void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx) |
| 671 | { |
| 672 | } |
Andrew Morton | c255a45 | 2012-07-31 16:43:02 -0700 | [diff] [blame] | 673 | #endif /* CONFIG_MEMCG */ |
Pavel Emelianov | 78fb746 | 2008-02-07 00:13:51 -0800 | [diff] [blame] | 674 | |
Tejun Heo | 52ebea7 | 2015-05-22 17:13:37 -0400 | [diff] [blame] | 675 | #ifdef CONFIG_CGROUP_WRITEBACK |
Tejun Heo | 841710a | 2015-05-22 18:23:33 -0400 | [diff] [blame] | 676 | |
Tejun Heo | 52ebea7 | 2015-05-22 17:13:37 -0400 | [diff] [blame] | 677 | struct list_head *mem_cgroup_cgwb_list(struct mem_cgroup *memcg); |
Tejun Heo | 841710a | 2015-05-22 18:23:33 -0400 | [diff] [blame] | 678 | struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb); |
Tejun Heo | c5edf9c | 2015-09-29 13:04:26 -0400 | [diff] [blame] | 679 | void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages, |
| 680 | unsigned long *pheadroom, unsigned long *pdirty, |
| 681 | unsigned long *pwriteback); |
Tejun Heo | 841710a | 2015-05-22 18:23:33 -0400 | [diff] [blame] | 682 | |
| 683 | #else /* CONFIG_CGROUP_WRITEBACK */ |
| 684 | |
| 685 | static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb) |
| 686 | { |
| 687 | return NULL; |
| 688 | } |
| 689 | |
Tejun Heo | c2aa723 | 2015-05-22 18:23:35 -0400 | [diff] [blame] | 690 | static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb, |
Tejun Heo | c5edf9c | 2015-09-29 13:04:26 -0400 | [diff] [blame] | 691 | unsigned long *pfilepages, |
| 692 | unsigned long *pheadroom, |
Tejun Heo | c2aa723 | 2015-05-22 18:23:35 -0400 | [diff] [blame] | 693 | unsigned long *pdirty, |
| 694 | unsigned long *pwriteback) |
| 695 | { |
| 696 | } |
| 697 | |
Tejun Heo | 841710a | 2015-05-22 18:23:33 -0400 | [diff] [blame] | 698 | #endif /* CONFIG_CGROUP_WRITEBACK */ |
Tejun Heo | 52ebea7 | 2015-05-22 17:13:37 -0400 | [diff] [blame] | 699 | |
Glauber Costa | e1aab16 | 2011-12-11 21:47:03 +0000 | [diff] [blame] | 700 | struct sock; |
Glauber Costa | e1aab16 | 2011-12-11 21:47:03 +0000 | [diff] [blame] | 701 | void sock_update_memcg(struct sock *sk); |
| 702 | void sock_release_memcg(struct sock *sk); |
Johannes Weiner | baac50b | 2016-01-14 15:21:17 -0800 | [diff] [blame] | 703 | bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); |
| 704 | 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] | 705 | #ifdef CONFIG_MEMCG |
Johannes Weiner | ef12947 | 2016-01-14 15:21:34 -0800 | [diff] [blame] | 706 | extern struct static_key_false memcg_sockets_enabled_key; |
| 707 | #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key) |
Johannes Weiner | baac50b | 2016-01-14 15:21:17 -0800 | [diff] [blame] | 708 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
Johannes Weiner | e805605 | 2016-01-14 15:21:14 -0800 | [diff] [blame] | 709 | { |
Johannes Weiner | 0db1529 | 2016-01-20 15:02:50 -0800 | [diff] [blame] | 710 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && memcg->tcpmem_pressure) |
Johannes Weiner | 8e8ae64 | 2016-01-14 15:21:32 -0800 | [diff] [blame] | 711 | return true; |
Johannes Weiner | 8e8ae64 | 2016-01-14 15:21:32 -0800 | [diff] [blame] | 712 | do { |
| 713 | if (time_before(jiffies, memcg->socket_pressure)) |
| 714 | return true; |
| 715 | } while ((memcg = parent_mem_cgroup(memcg))); |
| 716 | return false; |
Johannes Weiner | e805605 | 2016-01-14 15:21:14 -0800 | [diff] [blame] | 717 | } |
| 718 | #else |
Johannes Weiner | 80e95fe | 2016-01-14 15:21:20 -0800 | [diff] [blame] | 719 | #define mem_cgroup_sockets_enabled 0 |
Johannes Weiner | baac50b | 2016-01-14 15:21:17 -0800 | [diff] [blame] | 720 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
Johannes Weiner | e805605 | 2016-01-14 15:21:14 -0800 | [diff] [blame] | 721 | { |
| 722 | return false; |
| 723 | } |
| 724 | #endif |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 725 | |
Johannes Weiner | 127424c | 2016-01-20 15:02:32 -0800 | [diff] [blame] | 726 | #if defined(CONFIG_MEMCG) && !defined(CONFIG_SLOB) |
Johannes Weiner | ef12947 | 2016-01-14 15:21:34 -0800 | [diff] [blame] | 727 | extern struct static_key_false memcg_kmem_enabled_key; |
Glauber Costa | 749c541 | 2012-12-18 14:23:01 -0800 | [diff] [blame] | 728 | |
Vladimir Davydov | dbcf73e | 2015-02-12 14:58:57 -0800 | [diff] [blame] | 729 | extern int memcg_nr_cache_ids; |
Michal Hocko | 6421999 | 2015-09-08 15:01:07 -0700 | [diff] [blame] | 730 | void memcg_get_cache_ids(void); |
| 731 | void memcg_put_cache_ids(void); |
Glauber Costa | ebe945c | 2012-12-18 14:23:10 -0800 | [diff] [blame] | 732 | |
| 733 | /* |
| 734 | * Helper macro to loop through all memcg-specific caches. Callers must still |
| 735 | * check if the cache is valid (it is either valid or NULL). |
| 736 | * the slab_mutex must be held when looping through those caches |
| 737 | */ |
Glauber Costa | 749c541 | 2012-12-18 14:23:01 -0800 | [diff] [blame] | 738 | #define for_each_memcg_cache_index(_idx) \ |
Vladimir Davydov | dbcf73e | 2015-02-12 14:58:57 -0800 | [diff] [blame] | 739 | for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++) |
Glauber Costa | 749c541 | 2012-12-18 14:23:01 -0800 | [diff] [blame] | 740 | |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 741 | static inline bool memcg_kmem_enabled(void) |
| 742 | { |
Johannes Weiner | ef12947 | 2016-01-14 15:21:34 -0800 | [diff] [blame] | 743 | return static_branch_unlikely(&memcg_kmem_enabled_key); |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 744 | } |
| 745 | |
Johannes Weiner | 567e9ab | 2016-01-20 15:02:24 -0800 | [diff] [blame] | 746 | static inline bool memcg_kmem_online(struct mem_cgroup *memcg) |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 747 | { |
Johannes Weiner | 567e9ab | 2016-01-20 15:02:24 -0800 | [diff] [blame] | 748 | return memcg->kmem_state == KMEM_ONLINE; |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 749 | } |
Vladimir Davydov | cb731d6 | 2015-02-12 14:58:54 -0800 | [diff] [blame] | 750 | |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 751 | /* |
| 752 | * In general, we'll do everything in our power to not incur in any overhead |
| 753 | * for non-memcg users for the kmem functions. Not even a function call, if we |
| 754 | * can avoid it. |
| 755 | * |
| 756 | * Therefore, we'll inline all those functions so that in the best case, we'll |
| 757 | * see that kmemcg is off for everybody and proceed quickly. If it is on, |
| 758 | * we'll still do most of the flag checking inline. We check a lot of |
| 759 | * conditions, but because they are pretty simple, they are expected to be |
| 760 | * fast. |
| 761 | */ |
Vladimir Davydov | f3ccb2c4 | 2015-11-05 18:49:01 -0800 | [diff] [blame] | 762 | int __memcg_kmem_charge_memcg(struct page *page, gfp_t gfp, int order, |
| 763 | struct mem_cgroup *memcg); |
Vladimir Davydov | d05e83a | 2015-11-05 18:48:59 -0800 | [diff] [blame] | 764 | int __memcg_kmem_charge(struct page *page, gfp_t gfp, int order); |
| 765 | void __memcg_kmem_uncharge(struct page *page, int order); |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 766 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 767 | /* |
| 768 | * helper for acessing a memcg's index. It will be used as an index in the |
| 769 | * child cache array in kmem_cache, and also to derive its name. This function |
| 770 | * will return -1 when this is not a kmem-limited memcg. |
| 771 | */ |
| 772 | static inline int memcg_cache_id(struct mem_cgroup *memcg) |
| 773 | { |
| 774 | return memcg ? memcg->kmemcg_id : -1; |
| 775 | } |
Vladimir Davydov | 5722d09 | 2014-04-07 15:39:24 -0700 | [diff] [blame] | 776 | |
Vladimir Davydov | 230e9fc | 2016-01-14 15:18:15 -0800 | [diff] [blame] | 777 | struct kmem_cache *__memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp); |
Vladimir Davydov | 8135be5 | 2014-12-12 16:56:38 -0800 | [diff] [blame] | 778 | void __memcg_kmem_put_cache(struct kmem_cache *cachep); |
Glauber Costa | d7f25f8 | 2012-12-18 14:22:40 -0800 | [diff] [blame] | 779 | |
Vladimir Davydov | 230e9fc | 2016-01-14 15:18:15 -0800 | [diff] [blame] | 780 | static inline bool __memcg_kmem_bypass(void) |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 781 | { |
| 782 | if (!memcg_kmem_enabled()) |
| 783 | return true; |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 784 | if (in_interrupt() || (!current->mm) || (current->flags & PF_KTHREAD)) |
| 785 | return true; |
Tejun Heo | cbfb479 | 2015-11-05 18:46:14 -0800 | [diff] [blame] | 786 | return false; |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 787 | } |
| 788 | |
| 789 | /** |
Vladimir Davydov | d05e83a | 2015-11-05 18:48:59 -0800 | [diff] [blame] | 790 | * memcg_kmem_charge: charge a kmem page |
| 791 | * @page: page to charge |
| 792 | * @gfp: reclaim mode |
| 793 | * @order: allocation order |
Tejun Heo | cbfb479 | 2015-11-05 18:46:14 -0800 | [diff] [blame] | 794 | * |
Vladimir Davydov | d05e83a | 2015-11-05 18:48:59 -0800 | [diff] [blame] | 795 | * Returns 0 on success, an error code on failure. |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 796 | */ |
Vladimir Davydov | d05e83a | 2015-11-05 18:48:59 -0800 | [diff] [blame] | 797 | static __always_inline int memcg_kmem_charge(struct page *page, |
| 798 | gfp_t gfp, int order) |
Tejun Heo | cbfb479 | 2015-11-05 18:46:14 -0800 | [diff] [blame] | 799 | { |
Vladimir Davydov | 230e9fc | 2016-01-14 15:18:15 -0800 | [diff] [blame] | 800 | if (__memcg_kmem_bypass()) |
| 801 | return 0; |
| 802 | if (!(gfp & __GFP_ACCOUNT)) |
Vladimir Davydov | d05e83a | 2015-11-05 18:48:59 -0800 | [diff] [blame] | 803 | return 0; |
| 804 | return __memcg_kmem_charge(page, gfp, order); |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 805 | } |
| 806 | |
| 807 | /** |
Vladimir Davydov | d05e83a | 2015-11-05 18:48:59 -0800 | [diff] [blame] | 808 | * memcg_kmem_uncharge: uncharge a kmem page |
| 809 | * @page: page to uncharge |
| 810 | * @order: allocation order |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 811 | */ |
Vladimir Davydov | d05e83a | 2015-11-05 18:48:59 -0800 | [diff] [blame] | 812 | static __always_inline void memcg_kmem_uncharge(struct page *page, int order) |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 813 | { |
| 814 | if (memcg_kmem_enabled()) |
Vladimir Davydov | d05e83a | 2015-11-05 18:48:59 -0800 | [diff] [blame] | 815 | __memcg_kmem_uncharge(page, order); |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 816 | } |
| 817 | |
Glauber Costa | d7f25f8 | 2012-12-18 14:22:40 -0800 | [diff] [blame] | 818 | /** |
| 819 | * memcg_kmem_get_cache: selects the correct per-memcg cache for allocation |
| 820 | * @cachep: the original global kmem cache |
Glauber Costa | d7f25f8 | 2012-12-18 14:22:40 -0800 | [diff] [blame] | 821 | * |
Vladimir Davydov | 5dfb417 | 2014-06-04 16:06:38 -0700 | [diff] [blame] | 822 | * All memory allocated from a per-memcg cache is charged to the owner memcg. |
Glauber Costa | d7f25f8 | 2012-12-18 14:22:40 -0800 | [diff] [blame] | 823 | */ |
| 824 | static __always_inline struct kmem_cache * |
| 825 | memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp) |
| 826 | { |
Vladimir Davydov | 230e9fc | 2016-01-14 15:18:15 -0800 | [diff] [blame] | 827 | if (__memcg_kmem_bypass()) |
Glauber Costa | d7f25f8 | 2012-12-18 14:22:40 -0800 | [diff] [blame] | 828 | return cachep; |
Vladimir Davydov | 230e9fc | 2016-01-14 15:18:15 -0800 | [diff] [blame] | 829 | return __memcg_kmem_get_cache(cachep, gfp); |
Glauber Costa | d7f25f8 | 2012-12-18 14:22:40 -0800 | [diff] [blame] | 830 | } |
Vladimir Davydov | 8135be5 | 2014-12-12 16:56:38 -0800 | [diff] [blame] | 831 | |
| 832 | static __always_inline void memcg_kmem_put_cache(struct kmem_cache *cachep) |
| 833 | { |
| 834 | if (memcg_kmem_enabled()) |
| 835 | __memcg_kmem_put_cache(cachep); |
| 836 | } |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 837 | #else |
Glauber Costa | 749c541 | 2012-12-18 14:23:01 -0800 | [diff] [blame] | 838 | #define for_each_memcg_cache_index(_idx) \ |
| 839 | for (; NULL; ) |
| 840 | |
Glauber Costa | b9ce5ef | 2012-12-18 14:22:46 -0800 | [diff] [blame] | 841 | static inline bool memcg_kmem_enabled(void) |
| 842 | { |
| 843 | return false; |
| 844 | } |
| 845 | |
Johannes Weiner | 567e9ab | 2016-01-20 15:02:24 -0800 | [diff] [blame] | 846 | static inline bool memcg_kmem_online(struct mem_cgroup *memcg) |
Vladimir Davydov | cb731d6 | 2015-02-12 14:58:54 -0800 | [diff] [blame] | 847 | { |
| 848 | return false; |
| 849 | } |
| 850 | |
Vladimir Davydov | d05e83a | 2015-11-05 18:48:59 -0800 | [diff] [blame] | 851 | static inline int memcg_kmem_charge(struct page *page, gfp_t gfp, int order) |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 852 | { |
Vladimir Davydov | d05e83a | 2015-11-05 18:48:59 -0800 | [diff] [blame] | 853 | return 0; |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 854 | } |
| 855 | |
Vladimir Davydov | d05e83a | 2015-11-05 18:48:59 -0800 | [diff] [blame] | 856 | static inline void memcg_kmem_uncharge(struct page *page, int order) |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 857 | { |
| 858 | } |
Glauber Costa | 2633d7a | 2012-12-18 14:22:34 -0800 | [diff] [blame] | 859 | |
| 860 | static inline int memcg_cache_id(struct mem_cgroup *memcg) |
| 861 | { |
| 862 | return -1; |
| 863 | } |
| 864 | |
Vladimir Davydov | 05257a1 | 2015-02-12 14:59:01 -0800 | [diff] [blame] | 865 | static inline void memcg_get_cache_ids(void) |
| 866 | { |
| 867 | } |
| 868 | |
| 869 | static inline void memcg_put_cache_ids(void) |
| 870 | { |
| 871 | } |
| 872 | |
Glauber Costa | d7f25f8 | 2012-12-18 14:22:40 -0800 | [diff] [blame] | 873 | static inline struct kmem_cache * |
| 874 | memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp) |
| 875 | { |
| 876 | return cachep; |
| 877 | } |
Vladimir Davydov | 8135be5 | 2014-12-12 16:56:38 -0800 | [diff] [blame] | 878 | |
| 879 | static inline void memcg_kmem_put_cache(struct kmem_cache *cachep) |
| 880 | { |
| 881 | } |
Johannes Weiner | 127424c | 2016-01-20 15:02:32 -0800 | [diff] [blame] | 882 | #endif /* CONFIG_MEMCG && !CONFIG_SLOB */ |
| 883 | |
Balbir Singh | 8cdea7c | 2008-02-07 00:13:50 -0800 | [diff] [blame] | 884 | #endif /* _LINUX_MEMCONTROL_H */ |