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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, | |
b2807f07 | 53 | /* default hierarchy stats */ |
c792e824 | 54 | MEMCG_SOCK = MEM_CGROUP_STAT_NSTATS, |
b2807f07 | 55 | MEMCG_NR_STAT, |
2a7106f2 GT |
56 | }; |
57 | ||
5660048c JW |
58 | struct mem_cgroup_reclaim_cookie { |
59 | struct zone *zone; | |
60 | int priority; | |
61 | unsigned int generation; | |
62 | }; | |
63 | ||
241994ed JW |
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 | ||
33398cf2 MH |
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 | ||
c255a458 | 91 | #ifdef CONFIG_MEMCG |
33398cf2 | 92 | struct mem_cgroup_stat_cpu { |
b2807f07 | 93 | long count[MEMCG_NR_STAT]; |
33398cf2 MH |
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 | ||
567e9ab2 JW |
152 | enum memcg_kmem_state { |
153 | KMEM_NONE, | |
154 | KMEM_ALLOCATED, | |
155 | KMEM_ONLINE, | |
156 | }; | |
157 | ||
33398cf2 MH |
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; | |
37e84351 | 169 | struct page_counter swap; |
0db15298 JW |
170 | |
171 | /* Legacy consumer-oriented counters */ | |
33398cf2 MH |
172 | struct page_counter memsw; |
173 | struct page_counter kmem; | |
0db15298 | 174 | struct page_counter tcpmem; |
33398cf2 MH |
175 | |
176 | /* Normal memory consumption range */ | |
177 | unsigned long low; | |
178 | unsigned long high; | |
179 | ||
f7e1cb6e JW |
180 | /* Range enforcement for interrupt charges */ |
181 | struct work_struct high_work; | |
182 | ||
33398cf2 MH |
183 | unsigned long soft_limit; |
184 | ||
185 | /* vmpressure notifications */ | |
186 | struct vmpressure vmpressure; | |
187 | ||
33398cf2 MH |
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 | ||
472912a2 TH |
201 | /* handle for "memory.events" */ |
202 | struct cgroup_file events_file; | |
203 | ||
33398cf2 MH |
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; | |
33398cf2 | 233 | |
d886f4e4 JW |
234 | unsigned long socket_pressure; |
235 | ||
236 | /* Legacy tcp memory accounting */ | |
0db15298 JW |
237 | bool tcpmem_active; |
238 | int tcpmem_pressure; | |
d886f4e4 | 239 | |
127424c8 | 240 | #ifndef CONFIG_SLOB |
33398cf2 MH |
241 | /* Index in the kmem_cache->memcg_params.memcg_caches array */ |
242 | int kmemcg_id; | |
567e9ab2 | 243 | enum memcg_kmem_state kmem_state; |
33398cf2 MH |
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 | }; | |
7d828602 JW |
265 | |
266 | extern struct mem_cgroup *root_mem_cgroup; | |
56161634 | 267 | |
33398cf2 MH |
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, | |
241994ed | 275 | enum mem_cgroup_events_index idx, |
33398cf2 MH |
276 | unsigned int nr) |
277 | { | |
278 | this_cpu_add(memcg->stat->events[idx], nr); | |
472912a2 | 279 | cgroup_file_notify(&memcg->events_file); |
33398cf2 | 280 | } |
241994ed JW |
281 | |
282 | bool mem_cgroup_low(struct mem_cgroup *root, struct mem_cgroup *memcg); | |
283 | ||
00501b53 | 284 | int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
f627c2f5 KS |
285 | gfp_t gfp_mask, struct mem_cgroup **memcgp, |
286 | bool compound); | |
00501b53 | 287 | void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg, |
f627c2f5 KS |
288 | bool lrucare, bool compound); |
289 | void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg, | |
290 | bool compound); | |
0a31bc97 | 291 | void mem_cgroup_uncharge(struct page *page); |
747db954 | 292 | void mem_cgroup_uncharge_list(struct list_head *page_list); |
569b846d | 293 | |
45637bab | 294 | void mem_cgroup_replace_page(struct page *oldpage, struct page *newpage); |
569b846d | 295 | |
0a31bc97 JW |
296 | struct lruvec *mem_cgroup_zone_lruvec(struct zone *, struct mem_cgroup *); |
297 | struct lruvec *mem_cgroup_page_lruvec(struct page *, struct zone *); | |
c9b0ed51 | 298 | |
2314b42d | 299 | bool task_in_mem_cgroup(struct task_struct *task, struct mem_cgroup *memcg); |
64219994 | 300 | struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
e993d905 | 301 | |
33398cf2 MH |
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 | ||
8e8ae645 JW |
307 | #define mem_cgroup_from_counter(counter, member) \ |
308 | container_of(counter, struct mem_cgroup, member) | |
309 | ||
33398cf2 MH |
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 | ||
8e8ae645 JW |
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 | ||
33398cf2 MH |
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 | } | |
e1aab161 | 338 | |
2314b42d JW |
339 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
340 | struct mem_cgroup *memcg) | |
2e4d4091 | 341 | { |
587af308 | 342 | struct mem_cgroup *task_memcg; |
413918bb | 343 | bool match = false; |
c3ac9a8a | 344 | |
2e4d4091 | 345 | rcu_read_lock(); |
587af308 | 346 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
413918bb | 347 | if (task_memcg) |
2314b42d | 348 | match = mem_cgroup_is_descendant(task_memcg, memcg); |
2e4d4091 | 349 | rcu_read_unlock(); |
c3ac9a8a | 350 | return match; |
2e4d4091 | 351 | } |
8a9f3ccd | 352 | |
64219994 | 353 | struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page); |
2fc04524 | 354 | ino_t page_cgroup_ino(struct page *page); |
d324236b | 355 | |
33398cf2 MH |
356 | static inline bool mem_cgroup_disabled(void) |
357 | { | |
fc5ed1e9 | 358 | return !cgroup_subsys_enabled(memory_cgrp_subsys); |
33398cf2 | 359 | } |
5660048c | 360 | |
eb01aaab VD |
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 | ||
58ae83db KH |
368 | /* |
369 | * For memory reclaim. | |
370 | */ | |
889976db | 371 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
33398cf2 MH |
372 | |
373 | void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, | |
374 | int nr_pages); | |
375 | ||
33398cf2 MH |
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 | ||
13308ca9 | 385 | static inline bool mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec) |
33398cf2 MH |
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 | ||
b23afb93 TH |
404 | void mem_cgroup_handle_over_high(void); |
405 | ||
64219994 MH |
406 | void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, |
407 | struct task_struct *p); | |
58ae83db | 408 | |
49426420 | 409 | static inline void mem_cgroup_oom_enable(void) |
519e5247 | 410 | { |
626ebc41 TH |
411 | WARN_ON(current->memcg_may_oom); |
412 | current->memcg_may_oom = 1; | |
519e5247 JW |
413 | } |
414 | ||
49426420 | 415 | static inline void mem_cgroup_oom_disable(void) |
519e5247 | 416 | { |
626ebc41 TH |
417 | WARN_ON(!current->memcg_may_oom); |
418 | current->memcg_may_oom = 0; | |
519e5247 JW |
419 | } |
420 | ||
3812c8c8 JW |
421 | static inline bool task_in_memcg_oom(struct task_struct *p) |
422 | { | |
626ebc41 | 423 | return p->memcg_in_oom; |
3812c8c8 JW |
424 | } |
425 | ||
49426420 | 426 | bool mem_cgroup_oom_synchronize(bool wait); |
3812c8c8 | 427 | |
c255a458 | 428 | #ifdef CONFIG_MEMCG_SWAP |
c077719b KH |
429 | extern int do_swap_account; |
430 | #endif | |
f8d66542 | 431 | |
6de22619 | 432 | struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page); |
6de22619 | 433 | void mem_cgroup_end_page_stat(struct mem_cgroup *memcg); |
d7365e78 | 434 | |
33398cf2 MH |
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 | ||
d7365e78 | 452 | static inline void mem_cgroup_inc_page_stat(struct mem_cgroup *memcg, |
68b4876d | 453 | enum mem_cgroup_stat_index idx) |
2a7106f2 | 454 | { |
d7365e78 | 455 | mem_cgroup_update_page_stat(memcg, idx, 1); |
2a7106f2 GT |
456 | } |
457 | ||
d7365e78 | 458 | static inline void mem_cgroup_dec_page_stat(struct mem_cgroup *memcg, |
68b4876d | 459 | enum mem_cgroup_stat_index idx) |
2a7106f2 | 460 | { |
d7365e78 | 461 | mem_cgroup_update_page_stat(memcg, idx, -1); |
2a7106f2 GT |
462 | } |
463 | ||
0608f43d AM |
464 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
465 | gfp_t gfp_mask, | |
466 | unsigned long *total_scanned); | |
a63d83f4 | 467 | |
68ae564b DR |
468 | static inline void mem_cgroup_count_vm_event(struct mm_struct *mm, |
469 | enum vm_event_item idx) | |
470 | { | |
33398cf2 MH |
471 | struct mem_cgroup *memcg; |
472 | ||
68ae564b DR |
473 | if (mem_cgroup_disabled()) |
474 | return; | |
33398cf2 MH |
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(); | |
68ae564b | 493 | } |
ca3e0214 | 494 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
e94c8a9c | 495 | void mem_cgroup_split_huge_fixup(struct page *head); |
ca3e0214 KH |
496 | #endif |
497 | ||
c255a458 | 498 | #else /* CONFIG_MEMCG */ |
7a81b88c KH |
499 | struct mem_cgroup; |
500 | ||
241994ed JW |
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 | ||
00501b53 JW |
513 | static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
514 | gfp_t gfp_mask, | |
f627c2f5 KS |
515 | struct mem_cgroup **memcgp, |
516 | bool compound) | |
7a81b88c | 517 | { |
00501b53 | 518 | *memcgp = NULL; |
7a81b88c KH |
519 | return 0; |
520 | } | |
521 | ||
00501b53 JW |
522 | static inline void mem_cgroup_commit_charge(struct page *page, |
523 | struct mem_cgroup *memcg, | |
f627c2f5 | 524 | bool lrucare, bool compound) |
7a81b88c KH |
525 | { |
526 | } | |
527 | ||
00501b53 | 528 | static inline void mem_cgroup_cancel_charge(struct page *page, |
f627c2f5 KS |
529 | struct mem_cgroup *memcg, |
530 | bool compound) | |
7a81b88c KH |
531 | { |
532 | } | |
533 | ||
0a31bc97 | 534 | static inline void mem_cgroup_uncharge(struct page *page) |
569b846d KH |
535 | { |
536 | } | |
537 | ||
747db954 | 538 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
8a9f3ccd BS |
539 | { |
540 | } | |
541 | ||
45637bab | 542 | static inline void mem_cgroup_replace_page(struct page *old, struct page *new) |
69029cd5 KH |
543 | { |
544 | } | |
545 | ||
925b7673 JW |
546 | static inline struct lruvec *mem_cgroup_zone_lruvec(struct zone *zone, |
547 | struct mem_cgroup *memcg) | |
08e552c6 | 548 | { |
925b7673 | 549 | return &zone->lruvec; |
08e552c6 KH |
550 | } |
551 | ||
fa9add64 HD |
552 | static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, |
553 | struct zone *zone) | |
66e1707b | 554 | { |
925b7673 | 555 | return &zone->lruvec; |
66e1707b BS |
556 | } |
557 | ||
587af308 | 558 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
c0ff4b85 | 559 | struct mem_cgroup *memcg) |
bed7161a | 560 | { |
587af308 | 561 | return true; |
bed7161a BS |
562 | } |
563 | ||
ffbdccf5 DR |
564 | static inline bool task_in_mem_cgroup(struct task_struct *task, |
565 | const struct mem_cgroup *memcg) | |
4c4a2214 | 566 | { |
ffbdccf5 | 567 | return true; |
4c4a2214 DR |
568 | } |
569 | ||
5660048c JW |
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 | ||
f8d66542 HT |
583 | static inline bool mem_cgroup_disabled(void) |
584 | { | |
585 | return true; | |
586 | } | |
a636b327 | 587 | |
eb01aaab | 588 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
14797e23 | 589 | { |
13308ca9 | 590 | return true; |
14797e23 KM |
591 | } |
592 | ||
eb01aaab VD |
593 | static inline bool |
594 | mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec) | |
90cbc250 VD |
595 | { |
596 | return true; | |
597 | } | |
598 | ||
a3d8e054 | 599 | static inline unsigned long |
4d7dcca2 | 600 | mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru) |
a3d8e054 KM |
601 | { |
602 | return 0; | |
603 | } | |
604 | ||
fa9add64 HD |
605 | static inline void |
606 | mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, | |
607 | int increment) | |
3e2f41f1 | 608 | { |
3e2f41f1 KM |
609 | } |
610 | ||
e222432b BS |
611 | static inline void |
612 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) | |
613 | { | |
614 | } | |
615 | ||
6de22619 | 616 | static inline struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page) |
89c06bd5 | 617 | { |
d7365e78 | 618 | return NULL; |
89c06bd5 KH |
619 | } |
620 | ||
6de22619 | 621 | static inline void mem_cgroup_end_page_stat(struct mem_cgroup *memcg) |
89c06bd5 KH |
622 | { |
623 | } | |
624 | ||
b23afb93 TH |
625 | static inline void mem_cgroup_handle_over_high(void) |
626 | { | |
627 | } | |
628 | ||
49426420 | 629 | static inline void mem_cgroup_oom_enable(void) |
519e5247 JW |
630 | { |
631 | } | |
632 | ||
49426420 | 633 | static inline void mem_cgroup_oom_disable(void) |
519e5247 JW |
634 | { |
635 | } | |
636 | ||
3812c8c8 JW |
637 | static inline bool task_in_memcg_oom(struct task_struct *p) |
638 | { | |
639 | return false; | |
640 | } | |
641 | ||
49426420 | 642 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
3812c8c8 JW |
643 | { |
644 | return false; | |
645 | } | |
646 | ||
d7365e78 | 647 | static inline void mem_cgroup_inc_page_stat(struct mem_cgroup *memcg, |
68b4876d | 648 | enum mem_cgroup_stat_index idx) |
2a7106f2 GT |
649 | { |
650 | } | |
651 | ||
d7365e78 | 652 | static inline void mem_cgroup_dec_page_stat(struct mem_cgroup *memcg, |
68b4876d | 653 | enum mem_cgroup_stat_index idx) |
d69b042f BS |
654 | { |
655 | } | |
656 | ||
4e416953 | 657 | static inline |
0608f43d AM |
658 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
659 | gfp_t gfp_mask, | |
660 | unsigned long *total_scanned) | |
4e416953 | 661 | { |
0608f43d | 662 | return 0; |
4e416953 BS |
663 | } |
664 | ||
e94c8a9c | 665 | static inline void mem_cgroup_split_huge_fixup(struct page *head) |
ca3e0214 KH |
666 | { |
667 | } | |
668 | ||
456f998e YH |
669 | static inline |
670 | void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx) | |
671 | { | |
672 | } | |
c255a458 | 673 | #endif /* CONFIG_MEMCG */ |
78fb7466 | 674 | |
52ebea74 | 675 | #ifdef CONFIG_CGROUP_WRITEBACK |
841710aa | 676 | |
52ebea74 | 677 | struct list_head *mem_cgroup_cgwb_list(struct mem_cgroup *memcg); |
841710aa | 678 | struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb); |
c5edf9cd TH |
679 | void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages, |
680 | unsigned long *pheadroom, unsigned long *pdirty, | |
681 | unsigned long *pwriteback); | |
841710aa TH |
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 | ||
c2aa723a | 690 | static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb, |
c5edf9cd TH |
691 | unsigned long *pfilepages, |
692 | unsigned long *pheadroom, | |
c2aa723a TH |
693 | unsigned long *pdirty, |
694 | unsigned long *pwriteback) | |
695 | { | |
696 | } | |
697 | ||
841710aa | 698 | #endif /* CONFIG_CGROUP_WRITEBACK */ |
52ebea74 | 699 | |
e1aab161 | 700 | struct sock; |
e1aab161 GC |
701 | void sock_update_memcg(struct sock *sk); |
702 | void sock_release_memcg(struct sock *sk); | |
baac50bb JW |
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); | |
d886f4e4 | 705 | #ifdef CONFIG_MEMCG |
ef12947c JW |
706 | extern struct static_key_false memcg_sockets_enabled_key; |
707 | #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key) | |
baac50bb | 708 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c | 709 | { |
0db15298 | 710 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && memcg->tcpmem_pressure) |
8e8ae645 | 711 | return true; |
8e8ae645 JW |
712 | do { |
713 | if (time_before(jiffies, memcg->socket_pressure)) | |
714 | return true; | |
715 | } while ((memcg = parent_mem_cgroup(memcg))); | |
716 | return false; | |
e805605c JW |
717 | } |
718 | #else | |
80e95fe0 | 719 | #define mem_cgroup_sockets_enabled 0 |
baac50bb | 720 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c JW |
721 | { |
722 | return false; | |
723 | } | |
724 | #endif | |
7ae1e1d0 | 725 | |
127424c8 | 726 | #if defined(CONFIG_MEMCG) && !defined(CONFIG_SLOB) |
ef12947c | 727 | extern struct static_key_false memcg_kmem_enabled_key; |
749c5415 | 728 | |
dbcf73e2 | 729 | extern int memcg_nr_cache_ids; |
64219994 MH |
730 | void memcg_get_cache_ids(void); |
731 | void memcg_put_cache_ids(void); | |
ebe945c2 GC |
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 | */ | |
749c5415 | 738 | #define for_each_memcg_cache_index(_idx) \ |
dbcf73e2 | 739 | for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++) |
749c5415 | 740 | |
7ae1e1d0 GC |
741 | static inline bool memcg_kmem_enabled(void) |
742 | { | |
ef12947c | 743 | return static_branch_unlikely(&memcg_kmem_enabled_key); |
7ae1e1d0 GC |
744 | } |
745 | ||
567e9ab2 | 746 | static inline bool memcg_kmem_online(struct mem_cgroup *memcg) |
33398cf2 | 747 | { |
567e9ab2 | 748 | return memcg->kmem_state == KMEM_ONLINE; |
33398cf2 | 749 | } |
cb731d6c | 750 | |
7ae1e1d0 GC |
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 | */ | |
f3ccb2c4 VD |
762 | int __memcg_kmem_charge_memcg(struct page *page, gfp_t gfp, int order, |
763 | struct mem_cgroup *memcg); | |
d05e83a6 VD |
764 | int __memcg_kmem_charge(struct page *page, gfp_t gfp, int order); |
765 | void __memcg_kmem_uncharge(struct page *page, int order); | |
7ae1e1d0 | 766 | |
33398cf2 MH |
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 | } | |
5722d094 | 776 | |
230e9fc2 | 777 | struct kmem_cache *__memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp); |
8135be5a | 778 | void __memcg_kmem_put_cache(struct kmem_cache *cachep); |
d7f25f8a | 779 | |
230e9fc2 | 780 | static inline bool __memcg_kmem_bypass(void) |
7ae1e1d0 GC |
781 | { |
782 | if (!memcg_kmem_enabled()) | |
783 | return true; | |
7ae1e1d0 GC |
784 | if (in_interrupt() || (!current->mm) || (current->flags & PF_KTHREAD)) |
785 | return true; | |
cbfb4798 | 786 | return false; |
7ae1e1d0 GC |
787 | } |
788 | ||
789 | /** | |
d05e83a6 VD |
790 | * memcg_kmem_charge: charge a kmem page |
791 | * @page: page to charge | |
792 | * @gfp: reclaim mode | |
793 | * @order: allocation order | |
cbfb4798 | 794 | * |
d05e83a6 | 795 | * Returns 0 on success, an error code on failure. |
7ae1e1d0 | 796 | */ |
d05e83a6 VD |
797 | static __always_inline int memcg_kmem_charge(struct page *page, |
798 | gfp_t gfp, int order) | |
7ae1e1d0 | 799 | { |
230e9fc2 VD |
800 | if (__memcg_kmem_bypass()) |
801 | return 0; | |
802 | if (!(gfp & __GFP_ACCOUNT)) | |
d05e83a6 VD |
803 | return 0; |
804 | return __memcg_kmem_charge(page, gfp, order); | |
7ae1e1d0 GC |
805 | } |
806 | ||
807 | /** | |
d05e83a6 VD |
808 | * memcg_kmem_uncharge: uncharge a kmem page |
809 | * @page: page to uncharge | |
810 | * @order: allocation order | |
7ae1e1d0 | 811 | */ |
d05e83a6 | 812 | static __always_inline void memcg_kmem_uncharge(struct page *page, int order) |
7ae1e1d0 | 813 | { |
7ae1e1d0 | 814 | if (memcg_kmem_enabled()) |
d05e83a6 | 815 | __memcg_kmem_uncharge(page, order); |
7ae1e1d0 GC |
816 | } |
817 | ||
d7f25f8a GC |
818 | /** |
819 | * memcg_kmem_get_cache: selects the correct per-memcg cache for allocation | |
820 | * @cachep: the original global kmem cache | |
d7f25f8a | 821 | * |
5dfb4175 | 822 | * All memory allocated from a per-memcg cache is charged to the owner memcg. |
d7f25f8a GC |
823 | */ |
824 | static __always_inline struct kmem_cache * | |
825 | memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp) | |
826 | { | |
230e9fc2 | 827 | if (__memcg_kmem_bypass()) |
d7f25f8a | 828 | return cachep; |
230e9fc2 | 829 | return __memcg_kmem_get_cache(cachep, gfp); |
d7f25f8a | 830 | } |
8135be5a VD |
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 | } | |
7ae1e1d0 | 837 | #else |
749c5415 GC |
838 | #define for_each_memcg_cache_index(_idx) \ |
839 | for (; NULL; ) | |
840 | ||
b9ce5ef4 GC |
841 | static inline bool memcg_kmem_enabled(void) |
842 | { | |
843 | return false; | |
844 | } | |
845 | ||
567e9ab2 | 846 | static inline bool memcg_kmem_online(struct mem_cgroup *memcg) |
cb731d6c VD |
847 | { |
848 | return false; | |
849 | } | |
850 | ||
d05e83a6 | 851 | static inline int memcg_kmem_charge(struct page *page, gfp_t gfp, int order) |
7ae1e1d0 | 852 | { |
d05e83a6 | 853 | return 0; |
7ae1e1d0 GC |
854 | } |
855 | ||
d05e83a6 | 856 | static inline void memcg_kmem_uncharge(struct page *page, int order) |
7ae1e1d0 GC |
857 | { |
858 | } | |
2633d7a0 GC |
859 | |
860 | static inline int memcg_cache_id(struct mem_cgroup *memcg) | |
861 | { | |
862 | return -1; | |
863 | } | |
864 | ||
05257a1a VD |
865 | static inline void memcg_get_cache_ids(void) |
866 | { | |
867 | } | |
868 | ||
869 | static inline void memcg_put_cache_ids(void) | |
870 | { | |
871 | } | |
872 | ||
d7f25f8a GC |
873 | static inline struct kmem_cache * |
874 | memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp) | |
875 | { | |
876 | return cachep; | |
877 | } | |
8135be5a VD |
878 | |
879 | static inline void memcg_kmem_put_cache(struct kmem_cache *cachep) | |
880 | { | |
881 | } | |
127424c8 JW |
882 | #endif /* CONFIG_MEMCG && !CONFIG_SLOB */ |
883 | ||
8cdea7c0 | 884 | #endif /* _LINUX_MEMCONTROL_H */ |