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8cdea7c0 BS |
1 | /* memcontrol.h - Memory Controller |
2 | * | |
3 | * Copyright IBM Corporation, 2007 | |
4 | * Author Balbir Singh <balbir@linux.vnet.ibm.com> | |
5 | * | |
78fb7466 PE |
6 | * Copyright 2007 OpenVZ SWsoft Inc |
7 | * Author: Pavel Emelianov <xemul@openvz.org> | |
8 | * | |
8cdea7c0 BS |
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 | |
f8d66542 | 22 | #include <linux/cgroup.h> |
456f998e | 23 | #include <linux/vm_event_item.h> |
7ae1e1d0 | 24 | #include <linux/hardirq.h> |
a8964b9b | 25 | #include <linux/jump_label.h> |
33398cf2 MH |
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> | |
456f998e | 31 | |
78fb7466 | 32 | struct mem_cgroup; |
8697d331 BS |
33 | struct page; |
34 | struct mm_struct; | |
2633d7a0 | 35 | struct kmem_cache; |
78fb7466 | 36 | |
68b4876d SZ |
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 */ | |
c4843a75 | 49 | MEM_CGROUP_STAT_DIRTY, /* # of dirty pages in page cache */ |
3ea67d06 | 50 | MEM_CGROUP_STAT_WRITEBACK, /* # of pages under writeback */ |
68b4876d SZ |
51 | MEM_CGROUP_STAT_SWAP, /* # of pages, swapped out */ |
52 | MEM_CGROUP_STAT_NSTATS, | |
2a7106f2 GT |
53 | }; |
54 | ||
5660048c JW |
55 | struct mem_cgroup_reclaim_cookie { |
56 | struct zone *zone; | |
57 | int priority; | |
58 | unsigned int generation; | |
59 | }; | |
60 | ||
241994ed JW |
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 | ||
33398cf2 MH |
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 | ||
c255a458 | 88 | #ifdef CONFIG_MEMCG |
33398cf2 MH |
89 | struct mem_cgroup_stat_cpu { |
90 | long count[MEM_CGROUP_STAT_NSTATS]; | |
91 | unsigned long events[MEMCG_NR_EVENTS]; | |
92 | unsigned long nr_page_events; | |
93 | unsigned long targets[MEM_CGROUP_NTARGETS]; | |
94 | }; | |
95 | ||
96 | struct mem_cgroup_reclaim_iter { | |
97 | struct mem_cgroup *position; | |
98 | /* scan generation, increased every round-trip */ | |
99 | unsigned int generation; | |
100 | }; | |
101 | ||
102 | /* | |
103 | * per-zone information in memory controller. | |
104 | */ | |
105 | struct mem_cgroup_per_zone { | |
106 | struct lruvec lruvec; | |
107 | unsigned long lru_size[NR_LRU_LISTS]; | |
108 | ||
109 | struct mem_cgroup_reclaim_iter iter[DEF_PRIORITY + 1]; | |
110 | ||
111 | struct rb_node tree_node; /* RB tree node */ | |
112 | unsigned long usage_in_excess;/* Set to the value by which */ | |
113 | /* the soft limit is exceeded*/ | |
114 | bool on_tree; | |
115 | struct mem_cgroup *memcg; /* Back pointer, we cannot */ | |
116 | /* use container_of */ | |
117 | }; | |
118 | ||
119 | struct mem_cgroup_per_node { | |
120 | struct mem_cgroup_per_zone zoneinfo[MAX_NR_ZONES]; | |
121 | }; | |
122 | ||
123 | struct mem_cgroup_threshold { | |
124 | struct eventfd_ctx *eventfd; | |
125 | unsigned long threshold; | |
126 | }; | |
127 | ||
128 | /* For threshold */ | |
129 | struct mem_cgroup_threshold_ary { | |
130 | /* An array index points to threshold just below or equal to usage. */ | |
131 | int current_threshold; | |
132 | /* Size of entries[] */ | |
133 | unsigned int size; | |
134 | /* Array of thresholds */ | |
135 | struct mem_cgroup_threshold entries[0]; | |
136 | }; | |
137 | ||
138 | struct mem_cgroup_thresholds { | |
139 | /* Primary thresholds array */ | |
140 | struct mem_cgroup_threshold_ary *primary; | |
141 | /* | |
142 | * Spare threshold array. | |
143 | * This is needed to make mem_cgroup_unregister_event() "never fail". | |
144 | * It must be able to store at least primary->size - 1 entries. | |
145 | */ | |
146 | struct mem_cgroup_threshold_ary *spare; | |
147 | }; | |
148 | ||
567e9ab2 JW |
149 | enum memcg_kmem_state { |
150 | KMEM_NONE, | |
151 | KMEM_ALLOCATED, | |
152 | KMEM_ONLINE, | |
153 | }; | |
154 | ||
33398cf2 MH |
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; | |
37e84351 | 166 | struct page_counter swap; |
0db15298 JW |
167 | |
168 | /* Legacy consumer-oriented counters */ | |
33398cf2 MH |
169 | struct page_counter memsw; |
170 | struct page_counter kmem; | |
0db15298 | 171 | struct page_counter tcpmem; |
33398cf2 MH |
172 | |
173 | /* Normal memory consumption range */ | |
174 | unsigned long low; | |
175 | unsigned long high; | |
176 | ||
f7e1cb6e JW |
177 | /* Range enforcement for interrupt charges */ |
178 | struct work_struct high_work; | |
179 | ||
33398cf2 MH |
180 | unsigned long soft_limit; |
181 | ||
182 | /* vmpressure notifications */ | |
183 | struct vmpressure vmpressure; | |
184 | ||
33398cf2 MH |
185 | /* |
186 | * Should the accounting and control be hierarchical, per subtree? | |
187 | */ | |
188 | bool use_hierarchy; | |
189 | ||
190 | /* protected by memcg_oom_lock */ | |
191 | bool oom_lock; | |
192 | int under_oom; | |
193 | ||
194 | int swappiness; | |
195 | /* OOM-Killer disable */ | |
196 | int oom_kill_disable; | |
197 | ||
472912a2 TH |
198 | /* handle for "memory.events" */ |
199 | struct cgroup_file events_file; | |
200 | ||
33398cf2 MH |
201 | /* protect arrays of thresholds */ |
202 | struct mutex thresholds_lock; | |
203 | ||
204 | /* thresholds for memory usage. RCU-protected */ | |
205 | struct mem_cgroup_thresholds thresholds; | |
206 | ||
207 | /* thresholds for mem+swap usage. RCU-protected */ | |
208 | struct mem_cgroup_thresholds memsw_thresholds; | |
209 | ||
210 | /* For oom notifier event fd */ | |
211 | struct list_head oom_notify; | |
212 | ||
213 | /* | |
214 | * Should we move charges of a task when a task is moved into this | |
215 | * mem_cgroup ? And what type of charges should we move ? | |
216 | */ | |
217 | unsigned long move_charge_at_immigrate; | |
218 | /* | |
219 | * set > 0 if pages under this cgroup are moving to other cgroup. | |
220 | */ | |
221 | atomic_t moving_account; | |
222 | /* taken only while moving_account > 0 */ | |
223 | spinlock_t move_lock; | |
224 | struct task_struct *move_lock_task; | |
225 | unsigned long move_lock_flags; | |
226 | /* | |
227 | * percpu counter. | |
228 | */ | |
229 | struct mem_cgroup_stat_cpu __percpu *stat; | |
33398cf2 | 230 | |
d886f4e4 JW |
231 | unsigned long socket_pressure; |
232 | ||
233 | /* Legacy tcp memory accounting */ | |
0db15298 JW |
234 | bool tcpmem_active; |
235 | int tcpmem_pressure; | |
d886f4e4 | 236 | |
127424c8 | 237 | #ifndef CONFIG_SLOB |
33398cf2 MH |
238 | /* Index in the kmem_cache->memcg_params.memcg_caches array */ |
239 | int kmemcg_id; | |
567e9ab2 | 240 | enum memcg_kmem_state kmem_state; |
33398cf2 MH |
241 | #endif |
242 | ||
243 | int last_scanned_node; | |
244 | #if MAX_NUMNODES > 1 | |
245 | nodemask_t scan_nodes; | |
246 | atomic_t numainfo_events; | |
247 | atomic_t numainfo_updating; | |
248 | #endif | |
249 | ||
250 | #ifdef CONFIG_CGROUP_WRITEBACK | |
251 | struct list_head cgwb_list; | |
252 | struct wb_domain cgwb_domain; | |
253 | #endif | |
254 | ||
255 | /* List of events which userspace want to receive */ | |
256 | struct list_head event_list; | |
257 | spinlock_t event_list_lock; | |
258 | ||
259 | struct mem_cgroup_per_node *nodeinfo[0]; | |
260 | /* WARNING: nodeinfo must be the last member here */ | |
261 | }; | |
7d828602 JW |
262 | |
263 | extern struct mem_cgroup *root_mem_cgroup; | |
56161634 | 264 | |
33398cf2 MH |
265 | /** |
266 | * mem_cgroup_events - count memory events against a cgroup | |
267 | * @memcg: the memory cgroup | |
268 | * @idx: the event index | |
269 | * @nr: the number of events to account for | |
270 | */ | |
271 | static inline void mem_cgroup_events(struct mem_cgroup *memcg, | |
241994ed | 272 | enum mem_cgroup_events_index idx, |
33398cf2 MH |
273 | unsigned int nr) |
274 | { | |
275 | this_cpu_add(memcg->stat->events[idx], nr); | |
472912a2 | 276 | cgroup_file_notify(&memcg->events_file); |
33398cf2 | 277 | } |
241994ed JW |
278 | |
279 | bool mem_cgroup_low(struct mem_cgroup *root, struct mem_cgroup *memcg); | |
280 | ||
00501b53 | 281 | int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
f627c2f5 KS |
282 | gfp_t gfp_mask, struct mem_cgroup **memcgp, |
283 | bool compound); | |
00501b53 | 284 | void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg, |
f627c2f5 KS |
285 | bool lrucare, bool compound); |
286 | void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg, | |
287 | bool compound); | |
0a31bc97 | 288 | void mem_cgroup_uncharge(struct page *page); |
747db954 | 289 | void mem_cgroup_uncharge_list(struct list_head *page_list); |
569b846d | 290 | |
45637bab | 291 | void mem_cgroup_replace_page(struct page *oldpage, struct page *newpage); |
569b846d | 292 | |
0a31bc97 JW |
293 | struct lruvec *mem_cgroup_zone_lruvec(struct zone *, struct mem_cgroup *); |
294 | struct lruvec *mem_cgroup_page_lruvec(struct page *, struct zone *); | |
c9b0ed51 | 295 | |
2314b42d | 296 | bool task_in_mem_cgroup(struct task_struct *task, struct mem_cgroup *memcg); |
64219994 | 297 | struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
e993d905 | 298 | |
33398cf2 MH |
299 | static inline |
300 | struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){ | |
301 | return css ? container_of(css, struct mem_cgroup, css) : NULL; | |
302 | } | |
303 | ||
8e8ae645 JW |
304 | #define mem_cgroup_from_counter(counter, member) \ |
305 | container_of(counter, struct mem_cgroup, member) | |
306 | ||
33398cf2 MH |
307 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
308 | struct mem_cgroup *, | |
309 | struct mem_cgroup_reclaim_cookie *); | |
310 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); | |
311 | ||
8e8ae645 JW |
312 | /** |
313 | * parent_mem_cgroup - find the accounting parent of a memcg | |
314 | * @memcg: memcg whose parent to find | |
315 | * | |
316 | * Returns the parent memcg, or NULL if this is the root or the memory | |
317 | * controller is in legacy no-hierarchy mode. | |
318 | */ | |
319 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) | |
320 | { | |
321 | if (!memcg->memory.parent) | |
322 | return NULL; | |
323 | return mem_cgroup_from_counter(memcg->memory.parent, memory); | |
324 | } | |
325 | ||
33398cf2 MH |
326 | static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, |
327 | struct mem_cgroup *root) | |
328 | { | |
329 | if (root == memcg) | |
330 | return true; | |
331 | if (!root->use_hierarchy) | |
332 | return false; | |
333 | return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup); | |
334 | } | |
e1aab161 | 335 | |
2314b42d JW |
336 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
337 | struct mem_cgroup *memcg) | |
2e4d4091 | 338 | { |
587af308 | 339 | struct mem_cgroup *task_memcg; |
413918bb | 340 | bool match = false; |
c3ac9a8a | 341 | |
2e4d4091 | 342 | rcu_read_lock(); |
587af308 | 343 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
413918bb | 344 | if (task_memcg) |
2314b42d | 345 | match = mem_cgroup_is_descendant(task_memcg, memcg); |
2e4d4091 | 346 | rcu_read_unlock(); |
c3ac9a8a | 347 | return match; |
2e4d4091 | 348 | } |
8a9f3ccd | 349 | |
64219994 | 350 | struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page); |
2fc04524 | 351 | ino_t page_cgroup_ino(struct page *page); |
d324236b | 352 | |
33398cf2 MH |
353 | static inline bool mem_cgroup_disabled(void) |
354 | { | |
fc5ed1e9 | 355 | return !cgroup_subsys_enabled(memory_cgrp_subsys); |
33398cf2 | 356 | } |
5660048c | 357 | |
58ae83db KH |
358 | /* |
359 | * For memory reclaim. | |
360 | */ | |
889976db | 361 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
33398cf2 MH |
362 | |
363 | void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, | |
364 | int nr_pages); | |
365 | ||
366 | static inline bool mem_cgroup_lruvec_online(struct lruvec *lruvec) | |
367 | { | |
368 | struct mem_cgroup_per_zone *mz; | |
369 | struct mem_cgroup *memcg; | |
370 | ||
371 | if (mem_cgroup_disabled()) | |
372 | return true; | |
373 | ||
374 | mz = container_of(lruvec, struct mem_cgroup_per_zone, lruvec); | |
375 | memcg = mz->memcg; | |
376 | ||
377 | return !!(memcg->css.flags & CSS_ONLINE); | |
378 | } | |
379 | ||
380 | static inline | |
381 | unsigned long mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru) | |
382 | { | |
383 | struct mem_cgroup_per_zone *mz; | |
384 | ||
385 | mz = container_of(lruvec, struct mem_cgroup_per_zone, lruvec); | |
386 | return mz->lru_size[lru]; | |
387 | } | |
388 | ||
13308ca9 | 389 | static inline bool mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec) |
33398cf2 MH |
390 | { |
391 | unsigned long inactive_ratio; | |
392 | unsigned long inactive; | |
393 | unsigned long active; | |
394 | unsigned long gb; | |
395 | ||
396 | inactive = mem_cgroup_get_lru_size(lruvec, LRU_INACTIVE_ANON); | |
397 | active = mem_cgroup_get_lru_size(lruvec, LRU_ACTIVE_ANON); | |
398 | ||
399 | gb = (inactive + active) >> (30 - PAGE_SHIFT); | |
400 | if (gb) | |
401 | inactive_ratio = int_sqrt(10 * gb); | |
402 | else | |
403 | inactive_ratio = 1; | |
404 | ||
405 | return inactive * inactive_ratio < active; | |
406 | } | |
407 | ||
b23afb93 TH |
408 | void mem_cgroup_handle_over_high(void); |
409 | ||
64219994 MH |
410 | void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, |
411 | struct task_struct *p); | |
58ae83db | 412 | |
49426420 | 413 | static inline void mem_cgroup_oom_enable(void) |
519e5247 | 414 | { |
626ebc41 TH |
415 | WARN_ON(current->memcg_may_oom); |
416 | current->memcg_may_oom = 1; | |
519e5247 JW |
417 | } |
418 | ||
49426420 | 419 | static inline void mem_cgroup_oom_disable(void) |
519e5247 | 420 | { |
626ebc41 TH |
421 | WARN_ON(!current->memcg_may_oom); |
422 | current->memcg_may_oom = 0; | |
519e5247 JW |
423 | } |
424 | ||
3812c8c8 JW |
425 | static inline bool task_in_memcg_oom(struct task_struct *p) |
426 | { | |
626ebc41 | 427 | return p->memcg_in_oom; |
3812c8c8 JW |
428 | } |
429 | ||
49426420 | 430 | bool mem_cgroup_oom_synchronize(bool wait); |
3812c8c8 | 431 | |
c255a458 | 432 | #ifdef CONFIG_MEMCG_SWAP |
c077719b KH |
433 | extern int do_swap_account; |
434 | #endif | |
f8d66542 | 435 | |
6de22619 | 436 | struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page); |
6de22619 | 437 | void mem_cgroup_end_page_stat(struct mem_cgroup *memcg); |
d7365e78 | 438 | |
33398cf2 MH |
439 | /** |
440 | * mem_cgroup_update_page_stat - update page state statistics | |
441 | * @memcg: memcg to account against | |
442 | * @idx: page state item to account | |
443 | * @val: number of pages (positive or negative) | |
444 | * | |
445 | * See mem_cgroup_begin_page_stat() for locking requirements. | |
446 | */ | |
447 | static inline void mem_cgroup_update_page_stat(struct mem_cgroup *memcg, | |
448 | enum mem_cgroup_stat_index idx, int val) | |
449 | { | |
450 | VM_BUG_ON(!rcu_read_lock_held()); | |
451 | ||
452 | if (memcg) | |
453 | this_cpu_add(memcg->stat->count[idx], val); | |
454 | } | |
455 | ||
d7365e78 | 456 | static inline void mem_cgroup_inc_page_stat(struct mem_cgroup *memcg, |
68b4876d | 457 | enum mem_cgroup_stat_index idx) |
2a7106f2 | 458 | { |
d7365e78 | 459 | mem_cgroup_update_page_stat(memcg, idx, 1); |
2a7106f2 GT |
460 | } |
461 | ||
d7365e78 | 462 | static inline void mem_cgroup_dec_page_stat(struct mem_cgroup *memcg, |
68b4876d | 463 | enum mem_cgroup_stat_index idx) |
2a7106f2 | 464 | { |
d7365e78 | 465 | mem_cgroup_update_page_stat(memcg, idx, -1); |
2a7106f2 GT |
466 | } |
467 | ||
0608f43d AM |
468 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
469 | gfp_t gfp_mask, | |
470 | unsigned long *total_scanned); | |
a63d83f4 | 471 | |
68ae564b DR |
472 | static inline void mem_cgroup_count_vm_event(struct mm_struct *mm, |
473 | enum vm_event_item idx) | |
474 | { | |
33398cf2 MH |
475 | struct mem_cgroup *memcg; |
476 | ||
68ae564b DR |
477 | if (mem_cgroup_disabled()) |
478 | return; | |
33398cf2 MH |
479 | |
480 | rcu_read_lock(); | |
481 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
482 | if (unlikely(!memcg)) | |
483 | goto out; | |
484 | ||
485 | switch (idx) { | |
486 | case PGFAULT: | |
487 | this_cpu_inc(memcg->stat->events[MEM_CGROUP_EVENTS_PGFAULT]); | |
488 | break; | |
489 | case PGMAJFAULT: | |
490 | this_cpu_inc(memcg->stat->events[MEM_CGROUP_EVENTS_PGMAJFAULT]); | |
491 | break; | |
492 | default: | |
493 | BUG(); | |
494 | } | |
495 | out: | |
496 | rcu_read_unlock(); | |
68ae564b | 497 | } |
ca3e0214 | 498 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
e94c8a9c | 499 | void mem_cgroup_split_huge_fixup(struct page *head); |
ca3e0214 KH |
500 | #endif |
501 | ||
c255a458 | 502 | #else /* CONFIG_MEMCG */ |
7a81b88c KH |
503 | struct mem_cgroup; |
504 | ||
241994ed JW |
505 | static inline void mem_cgroup_events(struct mem_cgroup *memcg, |
506 | enum mem_cgroup_events_index idx, | |
507 | unsigned int nr) | |
508 | { | |
509 | } | |
510 | ||
511 | static inline bool mem_cgroup_low(struct mem_cgroup *root, | |
512 | struct mem_cgroup *memcg) | |
513 | { | |
514 | return false; | |
515 | } | |
516 | ||
00501b53 JW |
517 | static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
518 | gfp_t gfp_mask, | |
f627c2f5 KS |
519 | struct mem_cgroup **memcgp, |
520 | bool compound) | |
7a81b88c | 521 | { |
00501b53 | 522 | *memcgp = NULL; |
7a81b88c KH |
523 | return 0; |
524 | } | |
525 | ||
00501b53 JW |
526 | static inline void mem_cgroup_commit_charge(struct page *page, |
527 | struct mem_cgroup *memcg, | |
f627c2f5 | 528 | bool lrucare, bool compound) |
7a81b88c KH |
529 | { |
530 | } | |
531 | ||
00501b53 | 532 | static inline void mem_cgroup_cancel_charge(struct page *page, |
f627c2f5 KS |
533 | struct mem_cgroup *memcg, |
534 | bool compound) | |
7a81b88c KH |
535 | { |
536 | } | |
537 | ||
0a31bc97 | 538 | static inline void mem_cgroup_uncharge(struct page *page) |
569b846d KH |
539 | { |
540 | } | |
541 | ||
747db954 | 542 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
8a9f3ccd BS |
543 | { |
544 | } | |
545 | ||
45637bab | 546 | static inline void mem_cgroup_replace_page(struct page *old, struct page *new) |
69029cd5 KH |
547 | { |
548 | } | |
549 | ||
925b7673 JW |
550 | static inline struct lruvec *mem_cgroup_zone_lruvec(struct zone *zone, |
551 | struct mem_cgroup *memcg) | |
08e552c6 | 552 | { |
925b7673 | 553 | return &zone->lruvec; |
08e552c6 KH |
554 | } |
555 | ||
fa9add64 HD |
556 | static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, |
557 | struct zone *zone) | |
66e1707b | 558 | { |
925b7673 | 559 | return &zone->lruvec; |
66e1707b BS |
560 | } |
561 | ||
587af308 | 562 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
c0ff4b85 | 563 | struct mem_cgroup *memcg) |
bed7161a | 564 | { |
587af308 | 565 | return true; |
bed7161a BS |
566 | } |
567 | ||
ffbdccf5 DR |
568 | static inline bool task_in_mem_cgroup(struct task_struct *task, |
569 | const struct mem_cgroup *memcg) | |
4c4a2214 | 570 | { |
ffbdccf5 | 571 | return true; |
4c4a2214 DR |
572 | } |
573 | ||
5660048c JW |
574 | static inline struct mem_cgroup * |
575 | mem_cgroup_iter(struct mem_cgroup *root, | |
576 | struct mem_cgroup *prev, | |
577 | struct mem_cgroup_reclaim_cookie *reclaim) | |
578 | { | |
579 | return NULL; | |
580 | } | |
581 | ||
582 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
583 | struct mem_cgroup *prev) | |
584 | { | |
585 | } | |
586 | ||
f8d66542 HT |
587 | static inline bool mem_cgroup_disabled(void) |
588 | { | |
589 | return true; | |
590 | } | |
a636b327 | 591 | |
13308ca9 | 592 | static inline bool |
c56d5c7d | 593 | mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec) |
14797e23 | 594 | { |
13308ca9 | 595 | return true; |
14797e23 KM |
596 | } |
597 | ||
90cbc250 VD |
598 | static inline bool mem_cgroup_lruvec_online(struct lruvec *lruvec) |
599 | { | |
600 | return true; | |
601 | } | |
602 | ||
a3d8e054 | 603 | static inline unsigned long |
4d7dcca2 | 604 | mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru) |
a3d8e054 KM |
605 | { |
606 | return 0; | |
607 | } | |
608 | ||
fa9add64 HD |
609 | static inline void |
610 | mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, | |
611 | int increment) | |
3e2f41f1 | 612 | { |
3e2f41f1 KM |
613 | } |
614 | ||
e222432b BS |
615 | static inline void |
616 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) | |
617 | { | |
618 | } | |
619 | ||
6de22619 | 620 | static inline struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page) |
89c06bd5 | 621 | { |
d7365e78 | 622 | return NULL; |
89c06bd5 KH |
623 | } |
624 | ||
6de22619 | 625 | static inline void mem_cgroup_end_page_stat(struct mem_cgroup *memcg) |
89c06bd5 KH |
626 | { |
627 | } | |
628 | ||
b23afb93 TH |
629 | static inline void mem_cgroup_handle_over_high(void) |
630 | { | |
631 | } | |
632 | ||
49426420 | 633 | static inline void mem_cgroup_oom_enable(void) |
519e5247 JW |
634 | { |
635 | } | |
636 | ||
49426420 | 637 | static inline void mem_cgroup_oom_disable(void) |
519e5247 JW |
638 | { |
639 | } | |
640 | ||
3812c8c8 JW |
641 | static inline bool task_in_memcg_oom(struct task_struct *p) |
642 | { | |
643 | return false; | |
644 | } | |
645 | ||
49426420 | 646 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
3812c8c8 JW |
647 | { |
648 | return false; | |
649 | } | |
650 | ||
d7365e78 | 651 | static inline void mem_cgroup_inc_page_stat(struct mem_cgroup *memcg, |
68b4876d | 652 | enum mem_cgroup_stat_index idx) |
2a7106f2 GT |
653 | { |
654 | } | |
655 | ||
d7365e78 | 656 | static inline void mem_cgroup_dec_page_stat(struct mem_cgroup *memcg, |
68b4876d | 657 | enum mem_cgroup_stat_index idx) |
d69b042f BS |
658 | { |
659 | } | |
660 | ||
4e416953 | 661 | static inline |
0608f43d AM |
662 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
663 | gfp_t gfp_mask, | |
664 | unsigned long *total_scanned) | |
4e416953 | 665 | { |
0608f43d | 666 | return 0; |
4e416953 BS |
667 | } |
668 | ||
e94c8a9c | 669 | static inline void mem_cgroup_split_huge_fixup(struct page *head) |
ca3e0214 KH |
670 | { |
671 | } | |
672 | ||
456f998e YH |
673 | static inline |
674 | void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx) | |
675 | { | |
676 | } | |
c255a458 | 677 | #endif /* CONFIG_MEMCG */ |
78fb7466 | 678 | |
52ebea74 | 679 | #ifdef CONFIG_CGROUP_WRITEBACK |
841710aa | 680 | |
52ebea74 | 681 | struct list_head *mem_cgroup_cgwb_list(struct mem_cgroup *memcg); |
841710aa | 682 | struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb); |
c5edf9cd TH |
683 | void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages, |
684 | unsigned long *pheadroom, unsigned long *pdirty, | |
685 | unsigned long *pwriteback); | |
841710aa TH |
686 | |
687 | #else /* CONFIG_CGROUP_WRITEBACK */ | |
688 | ||
689 | static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb) | |
690 | { | |
691 | return NULL; | |
692 | } | |
693 | ||
c2aa723a | 694 | static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb, |
c5edf9cd TH |
695 | unsigned long *pfilepages, |
696 | unsigned long *pheadroom, | |
c2aa723a TH |
697 | unsigned long *pdirty, |
698 | unsigned long *pwriteback) | |
699 | { | |
700 | } | |
701 | ||
841710aa | 702 | #endif /* CONFIG_CGROUP_WRITEBACK */ |
52ebea74 | 703 | |
e1aab161 | 704 | struct sock; |
e1aab161 GC |
705 | void sock_update_memcg(struct sock *sk); |
706 | void sock_release_memcg(struct sock *sk); | |
baac50bb JW |
707 | bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); |
708 | void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); | |
d886f4e4 | 709 | #ifdef CONFIG_MEMCG |
ef12947c JW |
710 | extern struct static_key_false memcg_sockets_enabled_key; |
711 | #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key) | |
baac50bb | 712 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c | 713 | { |
0db15298 | 714 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && memcg->tcpmem_pressure) |
8e8ae645 | 715 | return true; |
8e8ae645 JW |
716 | do { |
717 | if (time_before(jiffies, memcg->socket_pressure)) | |
718 | return true; | |
719 | } while ((memcg = parent_mem_cgroup(memcg))); | |
720 | return false; | |
e805605c JW |
721 | } |
722 | #else | |
80e95fe0 | 723 | #define mem_cgroup_sockets_enabled 0 |
baac50bb | 724 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c JW |
725 | { |
726 | return false; | |
727 | } | |
728 | #endif | |
7ae1e1d0 | 729 | |
127424c8 | 730 | #if defined(CONFIG_MEMCG) && !defined(CONFIG_SLOB) |
ef12947c | 731 | extern struct static_key_false memcg_kmem_enabled_key; |
749c5415 | 732 | |
dbcf73e2 | 733 | extern int memcg_nr_cache_ids; |
64219994 MH |
734 | void memcg_get_cache_ids(void); |
735 | void memcg_put_cache_ids(void); | |
ebe945c2 GC |
736 | |
737 | /* | |
738 | * Helper macro to loop through all memcg-specific caches. Callers must still | |
739 | * check if the cache is valid (it is either valid or NULL). | |
740 | * the slab_mutex must be held when looping through those caches | |
741 | */ | |
749c5415 | 742 | #define for_each_memcg_cache_index(_idx) \ |
dbcf73e2 | 743 | for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++) |
749c5415 | 744 | |
7ae1e1d0 GC |
745 | static inline bool memcg_kmem_enabled(void) |
746 | { | |
ef12947c | 747 | return static_branch_unlikely(&memcg_kmem_enabled_key); |
7ae1e1d0 GC |
748 | } |
749 | ||
567e9ab2 | 750 | static inline bool memcg_kmem_online(struct mem_cgroup *memcg) |
33398cf2 | 751 | { |
567e9ab2 | 752 | return memcg->kmem_state == KMEM_ONLINE; |
33398cf2 | 753 | } |
cb731d6c | 754 | |
7ae1e1d0 GC |
755 | /* |
756 | * In general, we'll do everything in our power to not incur in any overhead | |
757 | * for non-memcg users for the kmem functions. Not even a function call, if we | |
758 | * can avoid it. | |
759 | * | |
760 | * Therefore, we'll inline all those functions so that in the best case, we'll | |
761 | * see that kmemcg is off for everybody and proceed quickly. If it is on, | |
762 | * we'll still do most of the flag checking inline. We check a lot of | |
763 | * conditions, but because they are pretty simple, they are expected to be | |
764 | * fast. | |
765 | */ | |
f3ccb2c4 VD |
766 | int __memcg_kmem_charge_memcg(struct page *page, gfp_t gfp, int order, |
767 | struct mem_cgroup *memcg); | |
d05e83a6 VD |
768 | int __memcg_kmem_charge(struct page *page, gfp_t gfp, int order); |
769 | void __memcg_kmem_uncharge(struct page *page, int order); | |
7ae1e1d0 | 770 | |
33398cf2 MH |
771 | /* |
772 | * helper for acessing a memcg's index. It will be used as an index in the | |
773 | * child cache array in kmem_cache, and also to derive its name. This function | |
774 | * will return -1 when this is not a kmem-limited memcg. | |
775 | */ | |
776 | static inline int memcg_cache_id(struct mem_cgroup *memcg) | |
777 | { | |
778 | return memcg ? memcg->kmemcg_id : -1; | |
779 | } | |
5722d094 | 780 | |
230e9fc2 | 781 | struct kmem_cache *__memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp); |
8135be5a | 782 | void __memcg_kmem_put_cache(struct kmem_cache *cachep); |
d7f25f8a | 783 | |
230e9fc2 | 784 | static inline bool __memcg_kmem_bypass(void) |
7ae1e1d0 GC |
785 | { |
786 | if (!memcg_kmem_enabled()) | |
787 | return true; | |
7ae1e1d0 GC |
788 | if (in_interrupt() || (!current->mm) || (current->flags & PF_KTHREAD)) |
789 | return true; | |
cbfb4798 | 790 | return false; |
7ae1e1d0 GC |
791 | } |
792 | ||
793 | /** | |
d05e83a6 VD |
794 | * memcg_kmem_charge: charge a kmem page |
795 | * @page: page to charge | |
796 | * @gfp: reclaim mode | |
797 | * @order: allocation order | |
cbfb4798 | 798 | * |
d05e83a6 | 799 | * Returns 0 on success, an error code on failure. |
7ae1e1d0 | 800 | */ |
d05e83a6 VD |
801 | static __always_inline int memcg_kmem_charge(struct page *page, |
802 | gfp_t gfp, int order) | |
7ae1e1d0 | 803 | { |
230e9fc2 VD |
804 | if (__memcg_kmem_bypass()) |
805 | return 0; | |
806 | if (!(gfp & __GFP_ACCOUNT)) | |
d05e83a6 VD |
807 | return 0; |
808 | return __memcg_kmem_charge(page, gfp, order); | |
7ae1e1d0 GC |
809 | } |
810 | ||
811 | /** | |
d05e83a6 VD |
812 | * memcg_kmem_uncharge: uncharge a kmem page |
813 | * @page: page to uncharge | |
814 | * @order: allocation order | |
7ae1e1d0 | 815 | */ |
d05e83a6 | 816 | static __always_inline void memcg_kmem_uncharge(struct page *page, int order) |
7ae1e1d0 | 817 | { |
7ae1e1d0 | 818 | if (memcg_kmem_enabled()) |
d05e83a6 | 819 | __memcg_kmem_uncharge(page, order); |
7ae1e1d0 GC |
820 | } |
821 | ||
d7f25f8a GC |
822 | /** |
823 | * memcg_kmem_get_cache: selects the correct per-memcg cache for allocation | |
824 | * @cachep: the original global kmem cache | |
d7f25f8a | 825 | * |
5dfb4175 | 826 | * All memory allocated from a per-memcg cache is charged to the owner memcg. |
d7f25f8a GC |
827 | */ |
828 | static __always_inline struct kmem_cache * | |
829 | memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp) | |
830 | { | |
230e9fc2 | 831 | if (__memcg_kmem_bypass()) |
d7f25f8a | 832 | return cachep; |
230e9fc2 | 833 | return __memcg_kmem_get_cache(cachep, gfp); |
d7f25f8a | 834 | } |
8135be5a VD |
835 | |
836 | static __always_inline void memcg_kmem_put_cache(struct kmem_cache *cachep) | |
837 | { | |
838 | if (memcg_kmem_enabled()) | |
839 | __memcg_kmem_put_cache(cachep); | |
840 | } | |
7ae1e1d0 | 841 | #else |
749c5415 GC |
842 | #define for_each_memcg_cache_index(_idx) \ |
843 | for (; NULL; ) | |
844 | ||
b9ce5ef4 GC |
845 | static inline bool memcg_kmem_enabled(void) |
846 | { | |
847 | return false; | |
848 | } | |
849 | ||
567e9ab2 | 850 | static inline bool memcg_kmem_online(struct mem_cgroup *memcg) |
cb731d6c VD |
851 | { |
852 | return false; | |
853 | } | |
854 | ||
d05e83a6 | 855 | static inline int memcg_kmem_charge(struct page *page, gfp_t gfp, int order) |
7ae1e1d0 | 856 | { |
d05e83a6 | 857 | return 0; |
7ae1e1d0 GC |
858 | } |
859 | ||
d05e83a6 | 860 | static inline void memcg_kmem_uncharge(struct page *page, int order) |
7ae1e1d0 GC |
861 | { |
862 | } | |
2633d7a0 GC |
863 | |
864 | static inline int memcg_cache_id(struct mem_cgroup *memcg) | |
865 | { | |
866 | return -1; | |
867 | } | |
868 | ||
05257a1a VD |
869 | static inline void memcg_get_cache_ids(void) |
870 | { | |
871 | } | |
872 | ||
873 | static inline void memcg_put_cache_ids(void) | |
874 | { | |
875 | } | |
876 | ||
d7f25f8a GC |
877 | static inline struct kmem_cache * |
878 | memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp) | |
879 | { | |
880 | return cachep; | |
881 | } | |
8135be5a VD |
882 | |
883 | static inline void memcg_kmem_put_cache(struct kmem_cache *cachep) | |
884 | { | |
885 | } | |
127424c8 JW |
886 | #endif /* CONFIG_MEMCG && !CONFIG_SLOB */ |
887 | ||
8cdea7c0 | 888 | #endif /* _LINUX_MEMCONTROL_H */ |