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, |
Greg Thelen | 2a7106f | 2011-01-13 15:47:37 -0800 | [diff] [blame] | 53 | }; |
| 54 | |
Johannes Weiner | 5660048 | 2012-01-12 17:17:59 -0800 | [diff] [blame] | 55 | struct mem_cgroup_reclaim_cookie { |
| 56 | struct zone *zone; |
| 57 | int priority; |
| 58 | unsigned int generation; |
| 59 | }; |
| 60 | |
Johannes Weiner | 241994ed | 2015-02-11 15:26:06 -0800 | [diff] [blame] | 61 | enum mem_cgroup_events_index { |
| 62 | MEM_CGROUP_EVENTS_PGPGIN, /* # of pages paged in */ |
| 63 | MEM_CGROUP_EVENTS_PGPGOUT, /* # of pages paged out */ |
| 64 | MEM_CGROUP_EVENTS_PGFAULT, /* # of page-faults */ |
| 65 | MEM_CGROUP_EVENTS_PGMAJFAULT, /* # of major page-faults */ |
| 66 | MEM_CGROUP_EVENTS_NSTATS, |
| 67 | /* default hierarchy events */ |
| 68 | MEMCG_LOW = MEM_CGROUP_EVENTS_NSTATS, |
| 69 | MEMCG_HIGH, |
| 70 | MEMCG_MAX, |
| 71 | MEMCG_OOM, |
| 72 | MEMCG_NR_EVENTS, |
| 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 cg_proto { |
| 89 | struct page_counter memory_allocated; /* Current allocated memory. */ |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 90 | int memory_pressure; |
Vladimir Davydov | 9ee11ba | 2016-01-14 15:19:41 -0800 | [diff] [blame] | 91 | bool active; |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 92 | }; |
| 93 | |
Andrew Morton | c255a45 | 2012-07-31 16:43:02 -0700 | [diff] [blame] | 94 | #ifdef CONFIG_MEMCG |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 95 | struct mem_cgroup_stat_cpu { |
| 96 | long count[MEM_CGROUP_STAT_NSTATS]; |
| 97 | unsigned long events[MEMCG_NR_EVENTS]; |
| 98 | unsigned long nr_page_events; |
| 99 | unsigned long targets[MEM_CGROUP_NTARGETS]; |
| 100 | }; |
| 101 | |
| 102 | struct mem_cgroup_reclaim_iter { |
| 103 | struct mem_cgroup *position; |
| 104 | /* scan generation, increased every round-trip */ |
| 105 | unsigned int generation; |
| 106 | }; |
| 107 | |
| 108 | /* |
| 109 | * per-zone information in memory controller. |
| 110 | */ |
| 111 | struct mem_cgroup_per_zone { |
| 112 | struct lruvec lruvec; |
| 113 | unsigned long lru_size[NR_LRU_LISTS]; |
| 114 | |
| 115 | struct mem_cgroup_reclaim_iter iter[DEF_PRIORITY + 1]; |
| 116 | |
| 117 | struct rb_node tree_node; /* RB tree node */ |
| 118 | unsigned long usage_in_excess;/* Set to the value by which */ |
| 119 | /* the soft limit is exceeded*/ |
| 120 | bool on_tree; |
| 121 | struct mem_cgroup *memcg; /* Back pointer, we cannot */ |
| 122 | /* use container_of */ |
| 123 | }; |
| 124 | |
| 125 | struct mem_cgroup_per_node { |
| 126 | struct mem_cgroup_per_zone zoneinfo[MAX_NR_ZONES]; |
| 127 | }; |
| 128 | |
| 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 | |
| 155 | /* |
| 156 | * The memory controller data structure. The memory controller controls both |
| 157 | * page cache and RSS per cgroup. We would eventually like to provide |
| 158 | * statistics based on the statistics developed by Rik Van Riel for clock-pro, |
| 159 | * to help the administrator determine what knobs to tune. |
| 160 | */ |
| 161 | struct mem_cgroup { |
| 162 | struct cgroup_subsys_state css; |
| 163 | |
| 164 | /* Accounted resources */ |
| 165 | struct page_counter memory; |
| 166 | struct page_counter memsw; |
| 167 | struct page_counter kmem; |
| 168 | |
| 169 | /* Normal memory consumption range */ |
| 170 | unsigned long low; |
| 171 | unsigned long high; |
| 172 | |
Johannes Weiner | f7e1cb6 | 2016-01-14 15:21:29 -0800 | [diff] [blame] | 173 | /* Range enforcement for interrupt charges */ |
| 174 | struct work_struct high_work; |
| 175 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 176 | unsigned long soft_limit; |
| 177 | |
| 178 | /* vmpressure notifications */ |
| 179 | struct vmpressure vmpressure; |
| 180 | |
| 181 | /* css_online() has been completed */ |
| 182 | int initialized; |
| 183 | |
| 184 | /* |
| 185 | * Should the accounting and control be hierarchical, per subtree? |
| 186 | */ |
| 187 | bool use_hierarchy; |
| 188 | |
| 189 | /* protected by memcg_oom_lock */ |
| 190 | bool oom_lock; |
| 191 | int under_oom; |
| 192 | |
| 193 | int swappiness; |
| 194 | /* OOM-Killer disable */ |
| 195 | int oom_kill_disable; |
| 196 | |
Tejun Heo | 472912a | 2015-09-18 18:01:59 -0400 | [diff] [blame] | 197 | /* handle for "memory.events" */ |
| 198 | struct cgroup_file events_file; |
| 199 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 200 | /* protect arrays of thresholds */ |
| 201 | struct mutex thresholds_lock; |
| 202 | |
| 203 | /* thresholds for memory usage. RCU-protected */ |
| 204 | struct mem_cgroup_thresholds thresholds; |
| 205 | |
| 206 | /* thresholds for mem+swap usage. RCU-protected */ |
| 207 | struct mem_cgroup_thresholds memsw_thresholds; |
| 208 | |
| 209 | /* For oom notifier event fd */ |
| 210 | struct list_head oom_notify; |
| 211 | |
| 212 | /* |
| 213 | * Should we move charges of a task when a task is moved into this |
| 214 | * mem_cgroup ? And what type of charges should we move ? |
| 215 | */ |
| 216 | unsigned long move_charge_at_immigrate; |
| 217 | /* |
| 218 | * set > 0 if pages under this cgroup are moving to other cgroup. |
| 219 | */ |
| 220 | atomic_t moving_account; |
| 221 | /* taken only while moving_account > 0 */ |
| 222 | spinlock_t move_lock; |
| 223 | struct task_struct *move_lock_task; |
| 224 | unsigned long move_lock_flags; |
| 225 | /* |
| 226 | * percpu counter. |
| 227 | */ |
| 228 | struct mem_cgroup_stat_cpu __percpu *stat; |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 229 | |
| 230 | #if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_INET) |
| 231 | struct cg_proto tcp_mem; |
| 232 | #endif |
| 233 | #if defined(CONFIG_MEMCG_KMEM) |
| 234 | /* Index in the kmem_cache->memcg_params.memcg_caches array */ |
| 235 | int kmemcg_id; |
| 236 | bool kmem_acct_activated; |
| 237 | bool kmem_acct_active; |
| 238 | #endif |
| 239 | |
| 240 | int last_scanned_node; |
| 241 | #if MAX_NUMNODES > 1 |
| 242 | nodemask_t scan_nodes; |
| 243 | atomic_t numainfo_events; |
| 244 | atomic_t numainfo_updating; |
| 245 | #endif |
| 246 | |
| 247 | #ifdef CONFIG_CGROUP_WRITEBACK |
| 248 | struct list_head cgwb_list; |
| 249 | struct wb_domain cgwb_domain; |
| 250 | #endif |
| 251 | |
Johannes Weiner | 8e8ae64 | 2016-01-14 15:21:32 -0800 | [diff] [blame^] | 252 | #ifdef CONFIG_INET |
| 253 | unsigned long socket_pressure; |
| 254 | #endif |
| 255 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 256 | /* List of events which userspace want to receive */ |
| 257 | struct list_head event_list; |
| 258 | spinlock_t event_list_lock; |
| 259 | |
| 260 | struct mem_cgroup_per_node *nodeinfo[0]; |
| 261 | /* WARNING: nodeinfo must be the last member here */ |
| 262 | }; |
Johannes Weiner | 7d82860 | 2016-01-14 15:20:56 -0800 | [diff] [blame] | 263 | |
| 264 | extern struct mem_cgroup *root_mem_cgroup; |
Tejun Heo | 5616163 | 2015-05-22 17:13:20 -0400 | [diff] [blame] | 265 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 266 | /** |
| 267 | * mem_cgroup_events - count memory events against a cgroup |
| 268 | * @memcg: the memory cgroup |
| 269 | * @idx: the event index |
| 270 | * @nr: the number of events to account for |
| 271 | */ |
| 272 | static inline void mem_cgroup_events(struct mem_cgroup *memcg, |
Johannes Weiner | 241994ed | 2015-02-11 15:26:06 -0800 | [diff] [blame] | 273 | enum mem_cgroup_events_index idx, |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 274 | unsigned int nr) |
| 275 | { |
| 276 | this_cpu_add(memcg->stat->events[idx], nr); |
Tejun Heo | 472912a | 2015-09-18 18:01:59 -0400 | [diff] [blame] | 277 | cgroup_file_notify(&memcg->events_file); |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 278 | } |
Johannes Weiner | 241994ed | 2015-02-11 15:26:06 -0800 | [diff] [blame] | 279 | |
| 280 | bool mem_cgroup_low(struct mem_cgroup *root, struct mem_cgroup *memcg); |
| 281 | |
Johannes Weiner | 00501b5 | 2014-08-08 14:19:20 -0700 | [diff] [blame] | 282 | int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
| 283 | gfp_t gfp_mask, struct mem_cgroup **memcgp); |
| 284 | void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg, |
| 285 | bool lrucare); |
| 286 | void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg); |
Johannes Weiner | 0a31bc9 | 2014-08-08 14:19:22 -0700 | [diff] [blame] | 287 | void mem_cgroup_uncharge(struct page *page); |
Johannes Weiner | 747db95 | 2014-08-08 14:19:24 -0700 | [diff] [blame] | 288 | void mem_cgroup_uncharge_list(struct list_head *page_list); |
Johannes Weiner | 0a31bc9 | 2014-08-08 14:19:22 -0700 | [diff] [blame] | 289 | |
Hugh Dickins | 45637ba | 2015-11-05 18:49:40 -0800 | [diff] [blame] | 290 | void mem_cgroup_replace_page(struct page *oldpage, struct page *newpage); |
Johannes Weiner | 0a31bc9 | 2014-08-08 14:19:22 -0700 | [diff] [blame] | 291 | |
Johannes Weiner | 925b767 | 2012-01-12 17:18:15 -0800 | [diff] [blame] | 292 | struct lruvec *mem_cgroup_zone_lruvec(struct zone *, struct mem_cgroup *); |
Hugh Dickins | fa9add6 | 2012-05-29 15:07:09 -0700 | [diff] [blame] | 293 | struct lruvec *mem_cgroup_page_lruvec(struct page *, struct zone *); |
KAMEZAWA Hiroyuki | 569b846 | 2009-12-15 16:47:03 -0800 | [diff] [blame] | 294 | |
Johannes Weiner | 2314b42 | 2014-12-10 15:44:33 -0800 | [diff] [blame] | 295 | 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] | 296 | struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
Vladimir Davydov | e993d90 | 2015-09-09 15:35:35 -0700 | [diff] [blame] | 297 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 298 | static inline |
| 299 | struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){ |
| 300 | return css ? container_of(css, struct mem_cgroup, css) : NULL; |
| 301 | } |
| 302 | |
Johannes Weiner | 8e8ae64 | 2016-01-14 15:21:32 -0800 | [diff] [blame^] | 303 | #define mem_cgroup_from_counter(counter, member) \ |
| 304 | container_of(counter, struct mem_cgroup, member) |
| 305 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 306 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
| 307 | struct mem_cgroup *, |
| 308 | struct mem_cgroup_reclaim_cookie *); |
| 309 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); |
| 310 | |
Johannes Weiner | 8e8ae64 | 2016-01-14 15:21:32 -0800 | [diff] [blame^] | 311 | /** |
| 312 | * parent_mem_cgroup - find the accounting parent of a memcg |
| 313 | * @memcg: memcg whose parent to find |
| 314 | * |
| 315 | * Returns the parent memcg, or NULL if this is the root or the memory |
| 316 | * controller is in legacy no-hierarchy mode. |
| 317 | */ |
| 318 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) |
| 319 | { |
| 320 | if (!memcg->memory.parent) |
| 321 | return NULL; |
| 322 | return mem_cgroup_from_counter(memcg->memory.parent, memory); |
| 323 | } |
| 324 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 325 | static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, |
| 326 | struct mem_cgroup *root) |
| 327 | { |
| 328 | if (root == memcg) |
| 329 | return true; |
| 330 | if (!root->use_hierarchy) |
| 331 | return false; |
| 332 | return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup); |
| 333 | } |
Glauber Costa | e1aab16 | 2011-12-11 21:47:03 +0000 | [diff] [blame] | 334 | |
Johannes Weiner | 2314b42 | 2014-12-10 15:44:33 -0800 | [diff] [blame] | 335 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
| 336 | struct mem_cgroup *memcg) |
Lai Jiangshan | 2e4d409 | 2009-01-07 18:08:07 -0800 | [diff] [blame] | 337 | { |
Johannes Weiner | 587af30 | 2012-10-08 16:34:12 -0700 | [diff] [blame] | 338 | struct mem_cgroup *task_memcg; |
Johannes Weiner | 413918b | 2014-12-10 15:44:30 -0800 | [diff] [blame] | 339 | bool match = false; |
Johannes Weiner | c3ac9a8 | 2012-05-29 15:06:25 -0700 | [diff] [blame] | 340 | |
Lai Jiangshan | 2e4d409 | 2009-01-07 18:08:07 -0800 | [diff] [blame] | 341 | rcu_read_lock(); |
Johannes Weiner | 587af30 | 2012-10-08 16:34:12 -0700 | [diff] [blame] | 342 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
Johannes Weiner | 413918b | 2014-12-10 15:44:30 -0800 | [diff] [blame] | 343 | if (task_memcg) |
Johannes Weiner | 2314b42 | 2014-12-10 15:44:33 -0800 | [diff] [blame] | 344 | match = mem_cgroup_is_descendant(task_memcg, memcg); |
Lai Jiangshan | 2e4d409 | 2009-01-07 18:08:07 -0800 | [diff] [blame] | 345 | rcu_read_unlock(); |
Johannes Weiner | c3ac9a8 | 2012-05-29 15:06:25 -0700 | [diff] [blame] | 346 | return match; |
Lai Jiangshan | 2e4d409 | 2009-01-07 18:08:07 -0800 | [diff] [blame] | 347 | } |
Balbir Singh | 8a9f3cc | 2008-02-07 00:13:53 -0800 | [diff] [blame] | 348 | |
Michal Hocko | 6421999 | 2015-09-08 15:01:07 -0700 | [diff] [blame] | 349 | struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page); |
Vladimir Davydov | 2fc0452 | 2015-09-09 15:35:28 -0700 | [diff] [blame] | 350 | ino_t page_cgroup_ino(struct page *page); |
Wu Fengguang | d324236 | 2009-12-16 12:19:59 +0100 | [diff] [blame] | 351 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 352 | static inline bool mem_cgroup_disabled(void) |
| 353 | { |
Tejun Heo | fc5ed1e | 2015-09-18 11:56:28 -0400 | [diff] [blame] | 354 | return !cgroup_subsys_enabled(memory_cgrp_subsys); |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 355 | } |
Johannes Weiner | 5660048 | 2012-01-12 17:17:59 -0800 | [diff] [blame] | 356 | |
KAMEZAWA Hiroyuki | 58ae83d | 2008-02-07 00:14:32 -0800 | [diff] [blame] | 357 | /* |
| 358 | * For memory reclaim. |
| 359 | */ |
Ying Han | 889976d | 2011-05-26 16:25:33 -0700 | [diff] [blame] | 360 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 361 | |
| 362 | void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, |
| 363 | int nr_pages); |
| 364 | |
| 365 | static inline bool mem_cgroup_lruvec_online(struct lruvec *lruvec) |
| 366 | { |
| 367 | struct mem_cgroup_per_zone *mz; |
| 368 | struct mem_cgroup *memcg; |
| 369 | |
| 370 | if (mem_cgroup_disabled()) |
| 371 | return true; |
| 372 | |
| 373 | mz = container_of(lruvec, struct mem_cgroup_per_zone, lruvec); |
| 374 | memcg = mz->memcg; |
| 375 | |
| 376 | return !!(memcg->css.flags & CSS_ONLINE); |
| 377 | } |
| 378 | |
| 379 | static inline |
| 380 | unsigned long mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru) |
| 381 | { |
| 382 | struct mem_cgroup_per_zone *mz; |
| 383 | |
| 384 | mz = container_of(lruvec, struct mem_cgroup_per_zone, lruvec); |
| 385 | return mz->lru_size[lru]; |
| 386 | } |
| 387 | |
Yaowei Bai | 13308ca | 2015-11-05 18:47:40 -0800 | [diff] [blame] | 388 | static inline bool mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec) |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 389 | { |
| 390 | unsigned long inactive_ratio; |
| 391 | unsigned long inactive; |
| 392 | unsigned long active; |
| 393 | unsigned long gb; |
| 394 | |
| 395 | inactive = mem_cgroup_get_lru_size(lruvec, LRU_INACTIVE_ANON); |
| 396 | active = mem_cgroup_get_lru_size(lruvec, LRU_ACTIVE_ANON); |
| 397 | |
| 398 | gb = (inactive + active) >> (30 - PAGE_SHIFT); |
| 399 | if (gb) |
| 400 | inactive_ratio = int_sqrt(10 * gb); |
| 401 | else |
| 402 | inactive_ratio = 1; |
| 403 | |
| 404 | return inactive * inactive_ratio < active; |
| 405 | } |
| 406 | |
Tejun Heo | b23afb9 | 2015-11-05 18:46:11 -0800 | [diff] [blame] | 407 | void mem_cgroup_handle_over_high(void); |
| 408 | |
Michal Hocko | 6421999 | 2015-09-08 15:01:07 -0700 | [diff] [blame] | 409 | void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, |
| 410 | struct task_struct *p); |
KAMEZAWA Hiroyuki | 58ae83d | 2008-02-07 00:14:32 -0800 | [diff] [blame] | 411 | |
Johannes Weiner | 4942642 | 2013-10-16 13:46:59 -0700 | [diff] [blame] | 412 | static inline void mem_cgroup_oom_enable(void) |
Johannes Weiner | 519e524 | 2013-09-12 15:13:42 -0700 | [diff] [blame] | 413 | { |
Tejun Heo | 626ebc4 | 2015-11-05 18:46:09 -0800 | [diff] [blame] | 414 | WARN_ON(current->memcg_may_oom); |
| 415 | current->memcg_may_oom = 1; |
Johannes Weiner | 519e524 | 2013-09-12 15:13:42 -0700 | [diff] [blame] | 416 | } |
| 417 | |
Johannes Weiner | 4942642 | 2013-10-16 13:46:59 -0700 | [diff] [blame] | 418 | static inline void mem_cgroup_oom_disable(void) |
Johannes Weiner | 519e524 | 2013-09-12 15:13:42 -0700 | [diff] [blame] | 419 | { |
Tejun Heo | 626ebc4 | 2015-11-05 18:46:09 -0800 | [diff] [blame] | 420 | WARN_ON(!current->memcg_may_oom); |
| 421 | current->memcg_may_oom = 0; |
Johannes Weiner | 519e524 | 2013-09-12 15:13:42 -0700 | [diff] [blame] | 422 | } |
| 423 | |
Johannes Weiner | 3812c8c | 2013-09-12 15:13:44 -0700 | [diff] [blame] | 424 | static inline bool task_in_memcg_oom(struct task_struct *p) |
| 425 | { |
Tejun Heo | 626ebc4 | 2015-11-05 18:46:09 -0800 | [diff] [blame] | 426 | return p->memcg_in_oom; |
Johannes Weiner | 3812c8c | 2013-09-12 15:13:44 -0700 | [diff] [blame] | 427 | } |
| 428 | |
Johannes Weiner | 4942642 | 2013-10-16 13:46:59 -0700 | [diff] [blame] | 429 | bool mem_cgroup_oom_synchronize(bool wait); |
Johannes Weiner | 3812c8c | 2013-09-12 15:13:44 -0700 | [diff] [blame] | 430 | |
Andrew Morton | c255a45 | 2012-07-31 16:43:02 -0700 | [diff] [blame] | 431 | #ifdef CONFIG_MEMCG_SWAP |
KAMEZAWA Hiroyuki | c077719 | 2009-01-07 18:07:57 -0800 | [diff] [blame] | 432 | extern int do_swap_account; |
| 433 | #endif |
Hirokazu Takahashi | f8d66542 | 2009-01-07 18:08:02 -0800 | [diff] [blame] | 434 | |
Johannes Weiner | 6de2261 | 2015-02-11 15:25:01 -0800 | [diff] [blame] | 435 | struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page); |
Johannes Weiner | 6de2261 | 2015-02-11 15:25:01 -0800 | [diff] [blame] | 436 | void mem_cgroup_end_page_stat(struct mem_cgroup *memcg); |
KAMEZAWA Hiroyuki | 89c06bd | 2012-03-21 16:34:25 -0700 | [diff] [blame] | 437 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 438 | /** |
| 439 | * mem_cgroup_update_page_stat - update page state statistics |
| 440 | * @memcg: memcg to account against |
| 441 | * @idx: page state item to account |
| 442 | * @val: number of pages (positive or negative) |
| 443 | * |
| 444 | * See mem_cgroup_begin_page_stat() for locking requirements. |
| 445 | */ |
| 446 | static inline void mem_cgroup_update_page_stat(struct mem_cgroup *memcg, |
| 447 | enum mem_cgroup_stat_index idx, int val) |
| 448 | { |
| 449 | VM_BUG_ON(!rcu_read_lock_held()); |
| 450 | |
| 451 | if (memcg) |
| 452 | this_cpu_add(memcg->stat->count[idx], val); |
| 453 | } |
| 454 | |
Johannes Weiner | d7365e7 | 2014-10-29 14:50:48 -0700 | [diff] [blame] | 455 | static inline void mem_cgroup_inc_page_stat(struct mem_cgroup *memcg, |
Sha Zhengju | 68b4876 | 2013-09-12 15:13:50 -0700 | [diff] [blame] | 456 | enum mem_cgroup_stat_index idx) |
Greg Thelen | 2a7106f | 2011-01-13 15:47:37 -0800 | [diff] [blame] | 457 | { |
Johannes Weiner | d7365e7 | 2014-10-29 14:50:48 -0700 | [diff] [blame] | 458 | mem_cgroup_update_page_stat(memcg, idx, 1); |
Greg Thelen | 2a7106f | 2011-01-13 15:47:37 -0800 | [diff] [blame] | 459 | } |
| 460 | |
Johannes Weiner | d7365e7 | 2014-10-29 14:50:48 -0700 | [diff] [blame] | 461 | static inline void mem_cgroup_dec_page_stat(struct mem_cgroup *memcg, |
Sha Zhengju | 68b4876 | 2013-09-12 15:13:50 -0700 | [diff] [blame] | 462 | enum mem_cgroup_stat_index idx) |
Greg Thelen | 2a7106f | 2011-01-13 15:47:37 -0800 | [diff] [blame] | 463 | { |
Johannes Weiner | d7365e7 | 2014-10-29 14:50:48 -0700 | [diff] [blame] | 464 | mem_cgroup_update_page_stat(memcg, idx, -1); |
Greg Thelen | 2a7106f | 2011-01-13 15:47:37 -0800 | [diff] [blame] | 465 | } |
| 466 | |
Andrew Morton | 0608f43 | 2013-09-24 15:27:41 -0700 | [diff] [blame] | 467 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
| 468 | gfp_t gfp_mask, |
| 469 | unsigned long *total_scanned); |
David Rientjes | a63d83f | 2010-08-09 17:19:46 -0700 | [diff] [blame] | 470 | |
David Rientjes | 68ae564 | 2012-12-12 13:51:57 -0800 | [diff] [blame] | 471 | static inline void mem_cgroup_count_vm_event(struct mm_struct *mm, |
| 472 | enum vm_event_item idx) |
| 473 | { |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 474 | struct mem_cgroup *memcg; |
| 475 | |
David Rientjes | 68ae564 | 2012-12-12 13:51:57 -0800 | [diff] [blame] | 476 | if (mem_cgroup_disabled()) |
| 477 | return; |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 478 | |
| 479 | rcu_read_lock(); |
| 480 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
| 481 | if (unlikely(!memcg)) |
| 482 | goto out; |
| 483 | |
| 484 | switch (idx) { |
| 485 | case PGFAULT: |
| 486 | this_cpu_inc(memcg->stat->events[MEM_CGROUP_EVENTS_PGFAULT]); |
| 487 | break; |
| 488 | case PGMAJFAULT: |
| 489 | this_cpu_inc(memcg->stat->events[MEM_CGROUP_EVENTS_PGMAJFAULT]); |
| 490 | break; |
| 491 | default: |
| 492 | BUG(); |
| 493 | } |
| 494 | out: |
| 495 | rcu_read_unlock(); |
David Rientjes | 68ae564 | 2012-12-12 13:51:57 -0800 | [diff] [blame] | 496 | } |
KAMEZAWA Hiroyuki | ca3e021 | 2011-01-20 14:44:24 -0800 | [diff] [blame] | 497 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
KAMEZAWA Hiroyuki | e94c8a9 | 2012-01-12 17:18:20 -0800 | [diff] [blame] | 498 | void mem_cgroup_split_huge_fixup(struct page *head); |
KAMEZAWA Hiroyuki | ca3e021 | 2011-01-20 14:44:24 -0800 | [diff] [blame] | 499 | #endif |
| 500 | |
Andrew Morton | c255a45 | 2012-07-31 16:43:02 -0700 | [diff] [blame] | 501 | #else /* CONFIG_MEMCG */ |
KAMEZAWA Hiroyuki | 7a81b88 | 2009-01-07 18:07:48 -0800 | [diff] [blame] | 502 | struct mem_cgroup; |
| 503 | |
Johannes Weiner | 241994ed | 2015-02-11 15:26:06 -0800 | [diff] [blame] | 504 | static inline void mem_cgroup_events(struct mem_cgroup *memcg, |
| 505 | enum mem_cgroup_events_index idx, |
| 506 | unsigned int nr) |
| 507 | { |
| 508 | } |
| 509 | |
| 510 | static inline bool mem_cgroup_low(struct mem_cgroup *root, |
| 511 | struct mem_cgroup *memcg) |
| 512 | { |
| 513 | return false; |
| 514 | } |
| 515 | |
Johannes Weiner | 00501b5 | 2014-08-08 14:19:20 -0700 | [diff] [blame] | 516 | static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
| 517 | gfp_t gfp_mask, |
| 518 | struct mem_cgroup **memcgp) |
Balbir Singh | 8a9f3cc | 2008-02-07 00:13:53 -0800 | [diff] [blame] | 519 | { |
Johannes Weiner | 00501b5 | 2014-08-08 14:19:20 -0700 | [diff] [blame] | 520 | *memcgp = NULL; |
Balbir Singh | 8a9f3cc | 2008-02-07 00:13:53 -0800 | [diff] [blame] | 521 | return 0; |
| 522 | } |
| 523 | |
Johannes Weiner | 00501b5 | 2014-08-08 14:19:20 -0700 | [diff] [blame] | 524 | static inline void mem_cgroup_commit_charge(struct page *page, |
| 525 | struct mem_cgroup *memcg, |
| 526 | bool lrucare) |
KAMEZAWA Hiroyuki | 7a81b88 | 2009-01-07 18:07:48 -0800 | [diff] [blame] | 527 | { |
| 528 | } |
| 529 | |
Johannes Weiner | 00501b5 | 2014-08-08 14:19:20 -0700 | [diff] [blame] | 530 | static inline void mem_cgroup_cancel_charge(struct page *page, |
| 531 | struct mem_cgroup *memcg) |
KAMEZAWA Hiroyuki | 7a81b88 | 2009-01-07 18:07:48 -0800 | [diff] [blame] | 532 | { |
| 533 | } |
| 534 | |
Johannes Weiner | 0a31bc9 | 2014-08-08 14:19:22 -0700 | [diff] [blame] | 535 | static inline void mem_cgroup_uncharge(struct page *page) |
| 536 | { |
| 537 | } |
| 538 | |
Johannes Weiner | 747db95 | 2014-08-08 14:19:24 -0700 | [diff] [blame] | 539 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
KAMEZAWA Hiroyuki | 569b846 | 2009-12-15 16:47:03 -0800 | [diff] [blame] | 540 | { |
| 541 | } |
| 542 | |
Hugh Dickins | 45637ba | 2015-11-05 18:49:40 -0800 | [diff] [blame] | 543 | 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] | 544 | { |
| 545 | } |
| 546 | |
Johannes Weiner | 925b767 | 2012-01-12 17:18:15 -0800 | [diff] [blame] | 547 | static inline struct lruvec *mem_cgroup_zone_lruvec(struct zone *zone, |
| 548 | struct mem_cgroup *memcg) |
| 549 | { |
| 550 | return &zone->lruvec; |
| 551 | } |
| 552 | |
Hugh Dickins | fa9add6 | 2012-05-29 15:07:09 -0700 | [diff] [blame] | 553 | static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, |
| 554 | struct zone *zone) |
Minchan Kim | 3f58a82 | 2011-03-22 16:32:53 -0700 | [diff] [blame] | 555 | { |
Johannes Weiner | 925b767 | 2012-01-12 17:18:15 -0800 | [diff] [blame] | 556 | return &zone->lruvec; |
Balbir Singh | 66e1707 | 2008-02-07 00:13:56 -0800 | [diff] [blame] | 557 | } |
| 558 | |
Johannes Weiner | 587af30 | 2012-10-08 16:34:12 -0700 | [diff] [blame] | 559 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
Raghavendra K T | c0ff4b8 | 2011-11-02 13:38:15 -0700 | [diff] [blame] | 560 | struct mem_cgroup *memcg) |
Balbir Singh | bed7161 | 2008-02-07 00:14:01 -0800 | [diff] [blame] | 561 | { |
Johannes Weiner | 587af30 | 2012-10-08 16:34:12 -0700 | [diff] [blame] | 562 | return true; |
Balbir Singh | bed7161 | 2008-02-07 00:14:01 -0800 | [diff] [blame] | 563 | } |
| 564 | |
David Rientjes | ffbdccf | 2013-07-03 15:01:23 -0700 | [diff] [blame] | 565 | static inline bool task_in_mem_cgroup(struct task_struct *task, |
| 566 | const struct mem_cgroup *memcg) |
David Rientjes | 4c4a221 | 2008-02-07 00:14:06 -0800 | [diff] [blame] | 567 | { |
David Rientjes | ffbdccf | 2013-07-03 15:01:23 -0700 | [diff] [blame] | 568 | return true; |
David Rientjes | 4c4a221 | 2008-02-07 00:14:06 -0800 | [diff] [blame] | 569 | } |
| 570 | |
Johannes Weiner | 5660048 | 2012-01-12 17:17:59 -0800 | [diff] [blame] | 571 | static inline struct mem_cgroup * |
| 572 | mem_cgroup_iter(struct mem_cgroup *root, |
| 573 | struct mem_cgroup *prev, |
| 574 | struct mem_cgroup_reclaim_cookie *reclaim) |
| 575 | { |
| 576 | return NULL; |
| 577 | } |
| 578 | |
| 579 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, |
| 580 | struct mem_cgroup *prev) |
| 581 | { |
| 582 | } |
| 583 | |
Hirokazu Takahashi | f8d66542 | 2009-01-07 18:08:02 -0800 | [diff] [blame] | 584 | static inline bool mem_cgroup_disabled(void) |
| 585 | { |
| 586 | return true; |
| 587 | } |
KAMEZAWA Hiroyuki | a636b32 | 2009-01-07 18:08:08 -0800 | [diff] [blame] | 588 | |
Yaowei Bai | 13308ca | 2015-11-05 18:47:40 -0800 | [diff] [blame] | 589 | static inline bool |
Konstantin Khlebnikov | c56d5c7 | 2012-05-29 15:07:00 -0700 | [diff] [blame] | 590 | mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec) |
KOSAKI Motohiro | 14797e2 | 2009-01-07 18:08:18 -0800 | [diff] [blame] | 591 | { |
Yaowei Bai | 13308ca | 2015-11-05 18:47:40 -0800 | [diff] [blame] | 592 | return true; |
KOSAKI Motohiro | 14797e2 | 2009-01-07 18:08:18 -0800 | [diff] [blame] | 593 | } |
| 594 | |
Vladimir Davydov | 90cbc25 | 2015-02-11 15:25:55 -0800 | [diff] [blame] | 595 | static inline bool mem_cgroup_lruvec_online(struct lruvec *lruvec) |
| 596 | { |
| 597 | return true; |
| 598 | } |
| 599 | |
KOSAKI Motohiro | a3d8e05 | 2009-01-07 18:08:19 -0800 | [diff] [blame] | 600 | static inline unsigned long |
Hugh Dickins | 4d7dcca | 2012-05-29 15:07:08 -0700 | [diff] [blame] | 601 | mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru) |
KOSAKI Motohiro | a3d8e05 | 2009-01-07 18:08:19 -0800 | [diff] [blame] | 602 | { |
| 603 | return 0; |
| 604 | } |
| 605 | |
Hugh Dickins | fa9add6 | 2012-05-29 15:07:09 -0700 | [diff] [blame] | 606 | static inline void |
| 607 | mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, |
| 608 | int increment) |
KOSAKI Motohiro | 3e2f41f | 2009-01-07 18:08:20 -0800 | [diff] [blame] | 609 | { |
KOSAKI Motohiro | 3e2f41f | 2009-01-07 18:08:20 -0800 | [diff] [blame] | 610 | } |
| 611 | |
Balbir Singh | e222432 | 2009-04-02 16:57:39 -0700 | [diff] [blame] | 612 | static inline void |
| 613 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) |
| 614 | { |
| 615 | } |
| 616 | |
Johannes Weiner | 6de2261 | 2015-02-11 15:25:01 -0800 | [diff] [blame] | 617 | 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] | 618 | { |
Johannes Weiner | d7365e7 | 2014-10-29 14:50:48 -0700 | [diff] [blame] | 619 | return NULL; |
KAMEZAWA Hiroyuki | 89c06bd | 2012-03-21 16:34:25 -0700 | [diff] [blame] | 620 | } |
| 621 | |
Johannes Weiner | 6de2261 | 2015-02-11 15:25:01 -0800 | [diff] [blame] | 622 | static inline void mem_cgroup_end_page_stat(struct mem_cgroup *memcg) |
KAMEZAWA Hiroyuki | 89c06bd | 2012-03-21 16:34:25 -0700 | [diff] [blame] | 623 | { |
| 624 | } |
| 625 | |
Tejun Heo | b23afb9 | 2015-11-05 18:46:11 -0800 | [diff] [blame] | 626 | static inline void mem_cgroup_handle_over_high(void) |
| 627 | { |
| 628 | } |
| 629 | |
Johannes Weiner | 4942642 | 2013-10-16 13:46:59 -0700 | [diff] [blame] | 630 | static inline void mem_cgroup_oom_enable(void) |
Johannes Weiner | 519e524 | 2013-09-12 15:13:42 -0700 | [diff] [blame] | 631 | { |
| 632 | } |
| 633 | |
Johannes Weiner | 4942642 | 2013-10-16 13:46:59 -0700 | [diff] [blame] | 634 | static inline void mem_cgroup_oom_disable(void) |
Johannes Weiner | 519e524 | 2013-09-12 15:13:42 -0700 | [diff] [blame] | 635 | { |
| 636 | } |
| 637 | |
Johannes Weiner | 3812c8c | 2013-09-12 15:13:44 -0700 | [diff] [blame] | 638 | static inline bool task_in_memcg_oom(struct task_struct *p) |
| 639 | { |
| 640 | return false; |
| 641 | } |
| 642 | |
Johannes Weiner | 4942642 | 2013-10-16 13:46:59 -0700 | [diff] [blame] | 643 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
Johannes Weiner | 3812c8c | 2013-09-12 15:13:44 -0700 | [diff] [blame] | 644 | { |
| 645 | return false; |
| 646 | } |
| 647 | |
Johannes Weiner | d7365e7 | 2014-10-29 14:50:48 -0700 | [diff] [blame] | 648 | static inline void mem_cgroup_inc_page_stat(struct mem_cgroup *memcg, |
Sha Zhengju | 68b4876 | 2013-09-12 15:13:50 -0700 | [diff] [blame] | 649 | enum mem_cgroup_stat_index idx) |
Greg Thelen | 2a7106f | 2011-01-13 15:47:37 -0800 | [diff] [blame] | 650 | { |
| 651 | } |
| 652 | |
Johannes Weiner | d7365e7 | 2014-10-29 14:50:48 -0700 | [diff] [blame] | 653 | static inline void mem_cgroup_dec_page_stat(struct mem_cgroup *memcg, |
Sha Zhengju | 68b4876 | 2013-09-12 15:13:50 -0700 | [diff] [blame] | 654 | enum mem_cgroup_stat_index idx) |
Balbir Singh | d69b042 | 2009-06-17 16:26:34 -0700 | [diff] [blame] | 655 | { |
| 656 | } |
| 657 | |
Balbir Singh | 4e41695 | 2009-09-23 15:56:39 -0700 | [diff] [blame] | 658 | static inline |
Andrew Morton | 0608f43 | 2013-09-24 15:27:41 -0700 | [diff] [blame] | 659 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
| 660 | gfp_t gfp_mask, |
| 661 | unsigned long *total_scanned) |
Balbir Singh | 4e41695 | 2009-09-23 15:56:39 -0700 | [diff] [blame] | 662 | { |
Andrew Morton | 0608f43 | 2013-09-24 15:27:41 -0700 | [diff] [blame] | 663 | return 0; |
Balbir Singh | 4e41695 | 2009-09-23 15:56:39 -0700 | [diff] [blame] | 664 | } |
| 665 | |
KAMEZAWA Hiroyuki | e94c8a9 | 2012-01-12 17:18:20 -0800 | [diff] [blame] | 666 | static inline void mem_cgroup_split_huge_fixup(struct page *head) |
KAMEZAWA Hiroyuki | ca3e021 | 2011-01-20 14:44:24 -0800 | [diff] [blame] | 667 | { |
| 668 | } |
| 669 | |
Ying Han | 456f998 | 2011-05-26 16:25:38 -0700 | [diff] [blame] | 670 | static inline |
| 671 | void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx) |
| 672 | { |
| 673 | } |
Andrew Morton | c255a45 | 2012-07-31 16:43:02 -0700 | [diff] [blame] | 674 | #endif /* CONFIG_MEMCG */ |
Pavel Emelianov | 78fb746 | 2008-02-07 00:13:51 -0800 | [diff] [blame] | 675 | |
Tejun Heo | 52ebea7 | 2015-05-22 17:13:37 -0400 | [diff] [blame] | 676 | #ifdef CONFIG_CGROUP_WRITEBACK |
Tejun Heo | 841710a | 2015-05-22 18:23:33 -0400 | [diff] [blame] | 677 | |
Tejun Heo | 52ebea7 | 2015-05-22 17:13:37 -0400 | [diff] [blame] | 678 | struct list_head *mem_cgroup_cgwb_list(struct mem_cgroup *memcg); |
Tejun Heo | 841710a | 2015-05-22 18:23:33 -0400 | [diff] [blame] | 679 | struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb); |
Tejun Heo | c5edf9c | 2015-09-29 13:04:26 -0400 | [diff] [blame] | 680 | void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages, |
| 681 | unsigned long *pheadroom, unsigned long *pdirty, |
| 682 | unsigned long *pwriteback); |
Tejun Heo | 841710a | 2015-05-22 18:23:33 -0400 | [diff] [blame] | 683 | |
| 684 | #else /* CONFIG_CGROUP_WRITEBACK */ |
| 685 | |
| 686 | static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb) |
| 687 | { |
| 688 | return NULL; |
| 689 | } |
| 690 | |
Tejun Heo | c2aa723 | 2015-05-22 18:23:35 -0400 | [diff] [blame] | 691 | static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb, |
Tejun Heo | c5edf9c | 2015-09-29 13:04:26 -0400 | [diff] [blame] | 692 | unsigned long *pfilepages, |
| 693 | unsigned long *pheadroom, |
Tejun Heo | c2aa723 | 2015-05-22 18:23:35 -0400 | [diff] [blame] | 694 | unsigned long *pdirty, |
| 695 | unsigned long *pwriteback) |
| 696 | { |
| 697 | } |
| 698 | |
Tejun Heo | 841710a | 2015-05-22 18:23:33 -0400 | [diff] [blame] | 699 | #endif /* CONFIG_CGROUP_WRITEBACK */ |
Tejun Heo | 52ebea7 | 2015-05-22 17:13:37 -0400 | [diff] [blame] | 700 | |
Glauber Costa | e1aab16 | 2011-12-11 21:47:03 +0000 | [diff] [blame] | 701 | struct sock; |
Glauber Costa | e1aab16 | 2011-12-11 21:47:03 +0000 | [diff] [blame] | 702 | void sock_update_memcg(struct sock *sk); |
| 703 | void sock_release_memcg(struct sock *sk); |
Johannes Weiner | baac50b | 2016-01-14 15:21:17 -0800 | [diff] [blame] | 704 | bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); |
| 705 | void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); |
Johannes Weiner | f7e1cb6 | 2016-01-14 15:21:29 -0800 | [diff] [blame] | 706 | #if defined(CONFIG_MEMCG) && defined(CONFIG_INET) |
Johannes Weiner | 80e95fe | 2016-01-14 15:21:20 -0800 | [diff] [blame] | 707 | extern struct static_key memcg_sockets_enabled_key; |
| 708 | #define mem_cgroup_sockets_enabled static_key_false(&memcg_sockets_enabled_key) |
Johannes Weiner | baac50b | 2016-01-14 15:21:17 -0800 | [diff] [blame] | 709 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
Johannes Weiner | e805605 | 2016-01-14 15:21:14 -0800 | [diff] [blame] | 710 | { |
Johannes Weiner | f7e1cb6 | 2016-01-14 15:21:29 -0800 | [diff] [blame] | 711 | #ifdef CONFIG_MEMCG_KMEM |
Johannes Weiner | 8e8ae64 | 2016-01-14 15:21:32 -0800 | [diff] [blame^] | 712 | if (memcg->tcp_mem.memory_pressure) |
| 713 | return true; |
Johannes Weiner | f7e1cb6 | 2016-01-14 15:21:29 -0800 | [diff] [blame] | 714 | #endif |
Johannes Weiner | 8e8ae64 | 2016-01-14 15:21:32 -0800 | [diff] [blame^] | 715 | do { |
| 716 | if (time_before(jiffies, memcg->socket_pressure)) |
| 717 | return true; |
| 718 | } while ((memcg = parent_mem_cgroup(memcg))); |
| 719 | return false; |
Johannes Weiner | e805605 | 2016-01-14 15:21:14 -0800 | [diff] [blame] | 720 | } |
| 721 | #else |
Johannes Weiner | 80e95fe | 2016-01-14 15:21:20 -0800 | [diff] [blame] | 722 | #define mem_cgroup_sockets_enabled 0 |
Johannes Weiner | baac50b | 2016-01-14 15:21:17 -0800 | [diff] [blame] | 723 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
Johannes Weiner | e805605 | 2016-01-14 15:21:14 -0800 | [diff] [blame] | 724 | { |
| 725 | return false; |
| 726 | } |
| 727 | #endif |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 728 | |
| 729 | #ifdef CONFIG_MEMCG_KMEM |
Glauber Costa | a8964b9 | 2012-12-18 14:22:09 -0800 | [diff] [blame] | 730 | extern struct static_key memcg_kmem_enabled_key; |
Glauber Costa | 749c541 | 2012-12-18 14:23:01 -0800 | [diff] [blame] | 731 | |
Vladimir Davydov | dbcf73e | 2015-02-12 14:58:57 -0800 | [diff] [blame] | 732 | extern int memcg_nr_cache_ids; |
Michal Hocko | 6421999 | 2015-09-08 15:01:07 -0700 | [diff] [blame] | 733 | void memcg_get_cache_ids(void); |
| 734 | void memcg_put_cache_ids(void); |
Glauber Costa | ebe945c | 2012-12-18 14:23:10 -0800 | [diff] [blame] | 735 | |
| 736 | /* |
| 737 | * Helper macro to loop through all memcg-specific caches. Callers must still |
| 738 | * check if the cache is valid (it is either valid or NULL). |
| 739 | * the slab_mutex must be held when looping through those caches |
| 740 | */ |
Glauber Costa | 749c541 | 2012-12-18 14:23:01 -0800 | [diff] [blame] | 741 | #define for_each_memcg_cache_index(_idx) \ |
Vladimir Davydov | dbcf73e | 2015-02-12 14:58:57 -0800 | [diff] [blame] | 742 | for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++) |
Glauber Costa | 749c541 | 2012-12-18 14:23:01 -0800 | [diff] [blame] | 743 | |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 744 | static inline bool memcg_kmem_enabled(void) |
| 745 | { |
Glauber Costa | a8964b9 | 2012-12-18 14:22:09 -0800 | [diff] [blame] | 746 | return static_key_false(&memcg_kmem_enabled_key); |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 747 | } |
| 748 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 749 | static inline bool memcg_kmem_is_active(struct mem_cgroup *memcg) |
| 750 | { |
| 751 | return memcg->kmem_acct_active; |
| 752 | } |
Vladimir Davydov | cb731d6 | 2015-02-12 14:58:54 -0800 | [diff] [blame] | 753 | |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 754 | /* |
| 755 | * In general, we'll do everything in our power to not incur in any overhead |
| 756 | * for non-memcg users for the kmem functions. Not even a function call, if we |
| 757 | * can avoid it. |
| 758 | * |
| 759 | * Therefore, we'll inline all those functions so that in the best case, we'll |
| 760 | * see that kmemcg is off for everybody and proceed quickly. If it is on, |
| 761 | * we'll still do most of the flag checking inline. We check a lot of |
| 762 | * conditions, but because they are pretty simple, they are expected to be |
| 763 | * fast. |
| 764 | */ |
Vladimir Davydov | f3ccb2c4 | 2015-11-05 18:49:01 -0800 | [diff] [blame] | 765 | int __memcg_kmem_charge_memcg(struct page *page, gfp_t gfp, int order, |
| 766 | struct mem_cgroup *memcg); |
Vladimir Davydov | d05e83a | 2015-11-05 18:48:59 -0800 | [diff] [blame] | 767 | int __memcg_kmem_charge(struct page *page, gfp_t gfp, int order); |
| 768 | void __memcg_kmem_uncharge(struct page *page, int order); |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 769 | |
Michal Hocko | 33398cf | 2015-09-08 15:01:02 -0700 | [diff] [blame] | 770 | /* |
| 771 | * helper for acessing a memcg's index. It will be used as an index in the |
| 772 | * child cache array in kmem_cache, and also to derive its name. This function |
| 773 | * will return -1 when this is not a kmem-limited memcg. |
| 774 | */ |
| 775 | static inline int memcg_cache_id(struct mem_cgroup *memcg) |
| 776 | { |
| 777 | return memcg ? memcg->kmemcg_id : -1; |
| 778 | } |
Vladimir Davydov | 5722d09 | 2014-04-07 15:39:24 -0700 | [diff] [blame] | 779 | |
Vladimir Davydov | 230e9fc | 2016-01-14 15:18:15 -0800 | [diff] [blame] | 780 | 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] | 781 | void __memcg_kmem_put_cache(struct kmem_cache *cachep); |
Glauber Costa | d7f25f8 | 2012-12-18 14:22:40 -0800 | [diff] [blame] | 782 | |
Vladimir Davydov | 230e9fc | 2016-01-14 15:18:15 -0800 | [diff] [blame] | 783 | static inline bool __memcg_kmem_bypass(void) |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 784 | { |
| 785 | if (!memcg_kmem_enabled()) |
| 786 | return true; |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 787 | if (in_interrupt() || (!current->mm) || (current->flags & PF_KTHREAD)) |
| 788 | return true; |
Tejun Heo | cbfb479 | 2015-11-05 18:46:14 -0800 | [diff] [blame] | 789 | return false; |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 790 | } |
| 791 | |
| 792 | /** |
Vladimir Davydov | d05e83a | 2015-11-05 18:48:59 -0800 | [diff] [blame] | 793 | * memcg_kmem_charge: charge a kmem page |
| 794 | * @page: page to charge |
| 795 | * @gfp: reclaim mode |
| 796 | * @order: allocation order |
Tejun Heo | cbfb479 | 2015-11-05 18:46:14 -0800 | [diff] [blame] | 797 | * |
Vladimir Davydov | d05e83a | 2015-11-05 18:48:59 -0800 | [diff] [blame] | 798 | * Returns 0 on success, an error code on failure. |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 799 | */ |
Vladimir Davydov | d05e83a | 2015-11-05 18:48:59 -0800 | [diff] [blame] | 800 | static __always_inline int memcg_kmem_charge(struct page *page, |
| 801 | gfp_t gfp, int order) |
Tejun Heo | cbfb479 | 2015-11-05 18:46:14 -0800 | [diff] [blame] | 802 | { |
Vladimir Davydov | 230e9fc | 2016-01-14 15:18:15 -0800 | [diff] [blame] | 803 | if (__memcg_kmem_bypass()) |
| 804 | return 0; |
| 805 | if (!(gfp & __GFP_ACCOUNT)) |
Vladimir Davydov | d05e83a | 2015-11-05 18:48:59 -0800 | [diff] [blame] | 806 | return 0; |
| 807 | return __memcg_kmem_charge(page, gfp, order); |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 808 | } |
| 809 | |
| 810 | /** |
Vladimir Davydov | d05e83a | 2015-11-05 18:48:59 -0800 | [diff] [blame] | 811 | * memcg_kmem_uncharge: uncharge a kmem page |
| 812 | * @page: page to uncharge |
| 813 | * @order: allocation order |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 814 | */ |
Vladimir Davydov | d05e83a | 2015-11-05 18:48:59 -0800 | [diff] [blame] | 815 | static __always_inline void memcg_kmem_uncharge(struct page *page, int order) |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 816 | { |
| 817 | if (memcg_kmem_enabled()) |
Vladimir Davydov | d05e83a | 2015-11-05 18:48:59 -0800 | [diff] [blame] | 818 | __memcg_kmem_uncharge(page, order); |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 819 | } |
| 820 | |
Glauber Costa | d7f25f8 | 2012-12-18 14:22:40 -0800 | [diff] [blame] | 821 | /** |
| 822 | * memcg_kmem_get_cache: selects the correct per-memcg cache for allocation |
| 823 | * @cachep: the original global kmem cache |
Glauber Costa | d7f25f8 | 2012-12-18 14:22:40 -0800 | [diff] [blame] | 824 | * |
Vladimir Davydov | 5dfb417 | 2014-06-04 16:06:38 -0700 | [diff] [blame] | 825 | * 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] | 826 | */ |
| 827 | static __always_inline struct kmem_cache * |
| 828 | memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp) |
| 829 | { |
Vladimir Davydov | 230e9fc | 2016-01-14 15:18:15 -0800 | [diff] [blame] | 830 | if (__memcg_kmem_bypass()) |
Glauber Costa | d7f25f8 | 2012-12-18 14:22:40 -0800 | [diff] [blame] | 831 | return cachep; |
Vladimir Davydov | 230e9fc | 2016-01-14 15:18:15 -0800 | [diff] [blame] | 832 | return __memcg_kmem_get_cache(cachep, gfp); |
Glauber Costa | d7f25f8 | 2012-12-18 14:22:40 -0800 | [diff] [blame] | 833 | } |
Vladimir Davydov | 8135be5 | 2014-12-12 16:56:38 -0800 | [diff] [blame] | 834 | |
| 835 | static __always_inline void memcg_kmem_put_cache(struct kmem_cache *cachep) |
| 836 | { |
| 837 | if (memcg_kmem_enabled()) |
| 838 | __memcg_kmem_put_cache(cachep); |
| 839 | } |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 840 | #else |
Glauber Costa | 749c541 | 2012-12-18 14:23:01 -0800 | [diff] [blame] | 841 | #define for_each_memcg_cache_index(_idx) \ |
| 842 | for (; NULL; ) |
| 843 | |
Glauber Costa | b9ce5ef | 2012-12-18 14:22:46 -0800 | [diff] [blame] | 844 | static inline bool memcg_kmem_enabled(void) |
| 845 | { |
| 846 | return false; |
| 847 | } |
| 848 | |
Vladimir Davydov | cb731d6 | 2015-02-12 14:58:54 -0800 | [diff] [blame] | 849 | static inline bool memcg_kmem_is_active(struct mem_cgroup *memcg) |
| 850 | { |
| 851 | return false; |
| 852 | } |
| 853 | |
Vladimir Davydov | d05e83a | 2015-11-05 18:48:59 -0800 | [diff] [blame] | 854 | 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] | 855 | { |
Vladimir Davydov | d05e83a | 2015-11-05 18:48:59 -0800 | [diff] [blame] | 856 | return 0; |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 857 | } |
| 858 | |
Vladimir Davydov | d05e83a | 2015-11-05 18:48:59 -0800 | [diff] [blame] | 859 | static inline void memcg_kmem_uncharge(struct page *page, int order) |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 860 | { |
| 861 | } |
Glauber Costa | 2633d7a | 2012-12-18 14:22:34 -0800 | [diff] [blame] | 862 | |
| 863 | static inline int memcg_cache_id(struct mem_cgroup *memcg) |
| 864 | { |
| 865 | return -1; |
| 866 | } |
| 867 | |
Vladimir Davydov | 05257a1 | 2015-02-12 14:59:01 -0800 | [diff] [blame] | 868 | static inline void memcg_get_cache_ids(void) |
| 869 | { |
| 870 | } |
| 871 | |
| 872 | static inline void memcg_put_cache_ids(void) |
| 873 | { |
| 874 | } |
| 875 | |
Glauber Costa | d7f25f8 | 2012-12-18 14:22:40 -0800 | [diff] [blame] | 876 | static inline struct kmem_cache * |
| 877 | memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp) |
| 878 | { |
| 879 | return cachep; |
| 880 | } |
Vladimir Davydov | 8135be5 | 2014-12-12 16:56:38 -0800 | [diff] [blame] | 881 | |
| 882 | static inline void memcg_kmem_put_cache(struct kmem_cache *cachep) |
| 883 | { |
| 884 | } |
Glauber Costa | 7ae1e1d | 2012-12-18 14:21:56 -0800 | [diff] [blame] | 885 | #endif /* CONFIG_MEMCG_KMEM */ |
Balbir Singh | 8cdea7c | 2008-02-07 00:13:50 -0800 | [diff] [blame] | 886 | #endif /* _LINUX_MEMCONTROL_H */ |