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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 | ||
33398cf2 MH |
88 | struct cg_proto { |
89 | struct page_counter memory_allocated; /* Current allocated memory. */ | |
33398cf2 | 90 | int memory_pressure; |
9ee11ba4 | 91 | bool active; |
33398cf2 MH |
92 | /* |
93 | * memcg field is used to find which memcg we belong directly | |
94 | * Each memcg struct can hold more than one cg_proto, so container_of | |
95 | * won't really cut. | |
96 | * | |
97 | * The elegant solution would be having an inverse function to | |
98 | * proto_cgroup in struct proto, but that means polluting the structure | |
99 | * for everybody, instead of just for memcg users. | |
100 | */ | |
101 | struct mem_cgroup *memcg; | |
102 | }; | |
103 | ||
c255a458 | 104 | #ifdef CONFIG_MEMCG |
33398cf2 MH |
105 | struct mem_cgroup_stat_cpu { |
106 | long count[MEM_CGROUP_STAT_NSTATS]; | |
107 | unsigned long events[MEMCG_NR_EVENTS]; | |
108 | unsigned long nr_page_events; | |
109 | unsigned long targets[MEM_CGROUP_NTARGETS]; | |
110 | }; | |
111 | ||
112 | struct mem_cgroup_reclaim_iter { | |
113 | struct mem_cgroup *position; | |
114 | /* scan generation, increased every round-trip */ | |
115 | unsigned int generation; | |
116 | }; | |
117 | ||
118 | /* | |
119 | * per-zone information in memory controller. | |
120 | */ | |
121 | struct mem_cgroup_per_zone { | |
122 | struct lruvec lruvec; | |
123 | unsigned long lru_size[NR_LRU_LISTS]; | |
124 | ||
125 | struct mem_cgroup_reclaim_iter iter[DEF_PRIORITY + 1]; | |
126 | ||
127 | struct rb_node tree_node; /* RB tree node */ | |
128 | unsigned long usage_in_excess;/* Set to the value by which */ | |
129 | /* the soft limit is exceeded*/ | |
130 | bool on_tree; | |
131 | struct mem_cgroup *memcg; /* Back pointer, we cannot */ | |
132 | /* use container_of */ | |
133 | }; | |
134 | ||
135 | struct mem_cgroup_per_node { | |
136 | struct mem_cgroup_per_zone zoneinfo[MAX_NR_ZONES]; | |
137 | }; | |
138 | ||
139 | struct mem_cgroup_threshold { | |
140 | struct eventfd_ctx *eventfd; | |
141 | unsigned long threshold; | |
142 | }; | |
143 | ||
144 | /* For threshold */ | |
145 | struct mem_cgroup_threshold_ary { | |
146 | /* An array index points to threshold just below or equal to usage. */ | |
147 | int current_threshold; | |
148 | /* Size of entries[] */ | |
149 | unsigned int size; | |
150 | /* Array of thresholds */ | |
151 | struct mem_cgroup_threshold entries[0]; | |
152 | }; | |
153 | ||
154 | struct mem_cgroup_thresholds { | |
155 | /* Primary thresholds array */ | |
156 | struct mem_cgroup_threshold_ary *primary; | |
157 | /* | |
158 | * Spare threshold array. | |
159 | * This is needed to make mem_cgroup_unregister_event() "never fail". | |
160 | * It must be able to store at least primary->size - 1 entries. | |
161 | */ | |
162 | struct mem_cgroup_threshold_ary *spare; | |
163 | }; | |
164 | ||
165 | /* | |
166 | * The memory controller data structure. The memory controller controls both | |
167 | * page cache and RSS per cgroup. We would eventually like to provide | |
168 | * statistics based on the statistics developed by Rik Van Riel for clock-pro, | |
169 | * to help the administrator determine what knobs to tune. | |
170 | */ | |
171 | struct mem_cgroup { | |
172 | struct cgroup_subsys_state css; | |
173 | ||
174 | /* Accounted resources */ | |
175 | struct page_counter memory; | |
176 | struct page_counter memsw; | |
177 | struct page_counter kmem; | |
178 | ||
179 | /* Normal memory consumption range */ | |
180 | unsigned long low; | |
181 | unsigned long high; | |
182 | ||
183 | unsigned long soft_limit; | |
184 | ||
185 | /* vmpressure notifications */ | |
186 | struct vmpressure vmpressure; | |
187 | ||
188 | /* css_online() has been completed */ | |
189 | int initialized; | |
190 | ||
191 | /* | |
192 | * Should the accounting and control be hierarchical, per subtree? | |
193 | */ | |
194 | bool use_hierarchy; | |
195 | ||
196 | /* protected by memcg_oom_lock */ | |
197 | bool oom_lock; | |
198 | int under_oom; | |
199 | ||
200 | int swappiness; | |
201 | /* OOM-Killer disable */ | |
202 | int oom_kill_disable; | |
203 | ||
472912a2 TH |
204 | /* handle for "memory.events" */ |
205 | struct cgroup_file events_file; | |
206 | ||
33398cf2 MH |
207 | /* protect arrays of thresholds */ |
208 | struct mutex thresholds_lock; | |
209 | ||
210 | /* thresholds for memory usage. RCU-protected */ | |
211 | struct mem_cgroup_thresholds thresholds; | |
212 | ||
213 | /* thresholds for mem+swap usage. RCU-protected */ | |
214 | struct mem_cgroup_thresholds memsw_thresholds; | |
215 | ||
216 | /* For oom notifier event fd */ | |
217 | struct list_head oom_notify; | |
218 | ||
219 | /* | |
220 | * Should we move charges of a task when a task is moved into this | |
221 | * mem_cgroup ? And what type of charges should we move ? | |
222 | */ | |
223 | unsigned long move_charge_at_immigrate; | |
224 | /* | |
225 | * set > 0 if pages under this cgroup are moving to other cgroup. | |
226 | */ | |
227 | atomic_t moving_account; | |
228 | /* taken only while moving_account > 0 */ | |
229 | spinlock_t move_lock; | |
230 | struct task_struct *move_lock_task; | |
231 | unsigned long move_lock_flags; | |
232 | /* | |
233 | * percpu counter. | |
234 | */ | |
235 | struct mem_cgroup_stat_cpu __percpu *stat; | |
33398cf2 MH |
236 | |
237 | #if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_INET) | |
238 | struct cg_proto tcp_mem; | |
239 | #endif | |
240 | #if defined(CONFIG_MEMCG_KMEM) | |
241 | /* Index in the kmem_cache->memcg_params.memcg_caches array */ | |
242 | int kmemcg_id; | |
243 | bool kmem_acct_activated; | |
244 | bool kmem_acct_active; | |
245 | #endif | |
246 | ||
247 | int last_scanned_node; | |
248 | #if MAX_NUMNODES > 1 | |
249 | nodemask_t scan_nodes; | |
250 | atomic_t numainfo_events; | |
251 | atomic_t numainfo_updating; | |
252 | #endif | |
253 | ||
254 | #ifdef CONFIG_CGROUP_WRITEBACK | |
255 | struct list_head cgwb_list; | |
256 | struct wb_domain cgwb_domain; | |
257 | #endif | |
258 | ||
259 | /* List of events which userspace want to receive */ | |
260 | struct list_head event_list; | |
261 | spinlock_t event_list_lock; | |
262 | ||
263 | struct mem_cgroup_per_node *nodeinfo[0]; | |
264 | /* WARNING: nodeinfo must be the last member here */ | |
265 | }; | |
7d828602 JW |
266 | |
267 | extern struct mem_cgroup *root_mem_cgroup; | |
56161634 | 268 | |
33398cf2 MH |
269 | /** |
270 | * mem_cgroup_events - count memory events against a cgroup | |
271 | * @memcg: the memory cgroup | |
272 | * @idx: the event index | |
273 | * @nr: the number of events to account for | |
274 | */ | |
275 | static inline void mem_cgroup_events(struct mem_cgroup *memcg, | |
241994ed | 276 | enum mem_cgroup_events_index idx, |
33398cf2 MH |
277 | unsigned int nr) |
278 | { | |
279 | this_cpu_add(memcg->stat->events[idx], nr); | |
472912a2 | 280 | cgroup_file_notify(&memcg->events_file); |
33398cf2 | 281 | } |
241994ed JW |
282 | |
283 | bool mem_cgroup_low(struct mem_cgroup *root, struct mem_cgroup *memcg); | |
284 | ||
00501b53 JW |
285 | int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
286 | gfp_t gfp_mask, struct mem_cgroup **memcgp); | |
287 | void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg, | |
288 | bool lrucare); | |
289 | void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg); | |
0a31bc97 | 290 | void mem_cgroup_uncharge(struct page *page); |
747db954 | 291 | void mem_cgroup_uncharge_list(struct list_head *page_list); |
569b846d | 292 | |
45637bab | 293 | void mem_cgroup_replace_page(struct page *oldpage, struct page *newpage); |
569b846d | 294 | |
0a31bc97 JW |
295 | struct lruvec *mem_cgroup_zone_lruvec(struct zone *, struct mem_cgroup *); |
296 | struct lruvec *mem_cgroup_page_lruvec(struct page *, struct zone *); | |
c9b0ed51 | 297 | |
2314b42d | 298 | bool task_in_mem_cgroup(struct task_struct *task, struct mem_cgroup *memcg); |
64219994 | 299 | struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
64219994 | 300 | struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg); |
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 | ||
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 | ||
312 | static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, | |
313 | struct mem_cgroup *root) | |
314 | { | |
315 | if (root == memcg) | |
316 | return true; | |
317 | if (!root->use_hierarchy) | |
318 | return false; | |
319 | return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup); | |
320 | } | |
e1aab161 | 321 | |
2314b42d JW |
322 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
323 | struct mem_cgroup *memcg) | |
2e4d4091 | 324 | { |
587af308 | 325 | struct mem_cgroup *task_memcg; |
413918bb | 326 | bool match = false; |
c3ac9a8a | 327 | |
2e4d4091 | 328 | rcu_read_lock(); |
587af308 | 329 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
413918bb | 330 | if (task_memcg) |
2314b42d | 331 | match = mem_cgroup_is_descendant(task_memcg, memcg); |
2e4d4091 | 332 | rcu_read_unlock(); |
c3ac9a8a | 333 | return match; |
2e4d4091 | 334 | } |
8a9f3ccd | 335 | |
64219994 | 336 | struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page); |
2fc04524 | 337 | ino_t page_cgroup_ino(struct page *page); |
d324236b | 338 | |
33398cf2 MH |
339 | static inline bool mem_cgroup_disabled(void) |
340 | { | |
fc5ed1e9 | 341 | return !cgroup_subsys_enabled(memory_cgrp_subsys); |
33398cf2 | 342 | } |
5660048c | 343 | |
58ae83db KH |
344 | /* |
345 | * For memory reclaim. | |
346 | */ | |
889976db | 347 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
33398cf2 MH |
348 | |
349 | void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, | |
350 | int nr_pages); | |
351 | ||
352 | static inline bool mem_cgroup_lruvec_online(struct lruvec *lruvec) | |
353 | { | |
354 | struct mem_cgroup_per_zone *mz; | |
355 | struct mem_cgroup *memcg; | |
356 | ||
357 | if (mem_cgroup_disabled()) | |
358 | return true; | |
359 | ||
360 | mz = container_of(lruvec, struct mem_cgroup_per_zone, lruvec); | |
361 | memcg = mz->memcg; | |
362 | ||
363 | return !!(memcg->css.flags & CSS_ONLINE); | |
364 | } | |
365 | ||
366 | static inline | |
367 | unsigned long mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru) | |
368 | { | |
369 | struct mem_cgroup_per_zone *mz; | |
370 | ||
371 | mz = container_of(lruvec, struct mem_cgroup_per_zone, lruvec); | |
372 | return mz->lru_size[lru]; | |
373 | } | |
374 | ||
13308ca9 | 375 | static inline bool mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec) |
33398cf2 MH |
376 | { |
377 | unsigned long inactive_ratio; | |
378 | unsigned long inactive; | |
379 | unsigned long active; | |
380 | unsigned long gb; | |
381 | ||
382 | inactive = mem_cgroup_get_lru_size(lruvec, LRU_INACTIVE_ANON); | |
383 | active = mem_cgroup_get_lru_size(lruvec, LRU_ACTIVE_ANON); | |
384 | ||
385 | gb = (inactive + active) >> (30 - PAGE_SHIFT); | |
386 | if (gb) | |
387 | inactive_ratio = int_sqrt(10 * gb); | |
388 | else | |
389 | inactive_ratio = 1; | |
390 | ||
391 | return inactive * inactive_ratio < active; | |
392 | } | |
393 | ||
b23afb93 TH |
394 | void mem_cgroup_handle_over_high(void); |
395 | ||
64219994 MH |
396 | void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, |
397 | struct task_struct *p); | |
58ae83db | 398 | |
49426420 | 399 | static inline void mem_cgroup_oom_enable(void) |
519e5247 | 400 | { |
626ebc41 TH |
401 | WARN_ON(current->memcg_may_oom); |
402 | current->memcg_may_oom = 1; | |
519e5247 JW |
403 | } |
404 | ||
49426420 | 405 | static inline void mem_cgroup_oom_disable(void) |
519e5247 | 406 | { |
626ebc41 TH |
407 | WARN_ON(!current->memcg_may_oom); |
408 | current->memcg_may_oom = 0; | |
519e5247 JW |
409 | } |
410 | ||
3812c8c8 JW |
411 | static inline bool task_in_memcg_oom(struct task_struct *p) |
412 | { | |
626ebc41 | 413 | return p->memcg_in_oom; |
3812c8c8 JW |
414 | } |
415 | ||
49426420 | 416 | bool mem_cgroup_oom_synchronize(bool wait); |
3812c8c8 | 417 | |
c255a458 | 418 | #ifdef CONFIG_MEMCG_SWAP |
c077719b KH |
419 | extern int do_swap_account; |
420 | #endif | |
f8d66542 | 421 | |
6de22619 | 422 | struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page); |
6de22619 | 423 | void mem_cgroup_end_page_stat(struct mem_cgroup *memcg); |
d7365e78 | 424 | |
33398cf2 MH |
425 | /** |
426 | * mem_cgroup_update_page_stat - update page state statistics | |
427 | * @memcg: memcg to account against | |
428 | * @idx: page state item to account | |
429 | * @val: number of pages (positive or negative) | |
430 | * | |
431 | * See mem_cgroup_begin_page_stat() for locking requirements. | |
432 | */ | |
433 | static inline void mem_cgroup_update_page_stat(struct mem_cgroup *memcg, | |
434 | enum mem_cgroup_stat_index idx, int val) | |
435 | { | |
436 | VM_BUG_ON(!rcu_read_lock_held()); | |
437 | ||
438 | if (memcg) | |
439 | this_cpu_add(memcg->stat->count[idx], val); | |
440 | } | |
441 | ||
d7365e78 | 442 | static inline void mem_cgroup_inc_page_stat(struct mem_cgroup *memcg, |
68b4876d | 443 | enum mem_cgroup_stat_index idx) |
2a7106f2 | 444 | { |
d7365e78 | 445 | mem_cgroup_update_page_stat(memcg, idx, 1); |
2a7106f2 GT |
446 | } |
447 | ||
d7365e78 | 448 | static inline void mem_cgroup_dec_page_stat(struct mem_cgroup *memcg, |
68b4876d | 449 | enum mem_cgroup_stat_index idx) |
2a7106f2 | 450 | { |
d7365e78 | 451 | mem_cgroup_update_page_stat(memcg, idx, -1); |
2a7106f2 GT |
452 | } |
453 | ||
0608f43d AM |
454 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
455 | gfp_t gfp_mask, | |
456 | unsigned long *total_scanned); | |
a63d83f4 | 457 | |
68ae564b DR |
458 | static inline void mem_cgroup_count_vm_event(struct mm_struct *mm, |
459 | enum vm_event_item idx) | |
460 | { | |
33398cf2 MH |
461 | struct mem_cgroup *memcg; |
462 | ||
68ae564b DR |
463 | if (mem_cgroup_disabled()) |
464 | return; | |
33398cf2 MH |
465 | |
466 | rcu_read_lock(); | |
467 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
468 | if (unlikely(!memcg)) | |
469 | goto out; | |
470 | ||
471 | switch (idx) { | |
472 | case PGFAULT: | |
473 | this_cpu_inc(memcg->stat->events[MEM_CGROUP_EVENTS_PGFAULT]); | |
474 | break; | |
475 | case PGMAJFAULT: | |
476 | this_cpu_inc(memcg->stat->events[MEM_CGROUP_EVENTS_PGMAJFAULT]); | |
477 | break; | |
478 | default: | |
479 | BUG(); | |
480 | } | |
481 | out: | |
482 | rcu_read_unlock(); | |
68ae564b | 483 | } |
ca3e0214 | 484 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
e94c8a9c | 485 | void mem_cgroup_split_huge_fixup(struct page *head); |
ca3e0214 KH |
486 | #endif |
487 | ||
c255a458 | 488 | #else /* CONFIG_MEMCG */ |
7a81b88c KH |
489 | struct mem_cgroup; |
490 | ||
241994ed JW |
491 | static inline void mem_cgroup_events(struct mem_cgroup *memcg, |
492 | enum mem_cgroup_events_index idx, | |
493 | unsigned int nr) | |
494 | { | |
495 | } | |
496 | ||
497 | static inline bool mem_cgroup_low(struct mem_cgroup *root, | |
498 | struct mem_cgroup *memcg) | |
499 | { | |
500 | return false; | |
501 | } | |
502 | ||
00501b53 JW |
503 | static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
504 | gfp_t gfp_mask, | |
505 | struct mem_cgroup **memcgp) | |
7a81b88c | 506 | { |
00501b53 | 507 | *memcgp = NULL; |
7a81b88c KH |
508 | return 0; |
509 | } | |
510 | ||
00501b53 JW |
511 | static inline void mem_cgroup_commit_charge(struct page *page, |
512 | struct mem_cgroup *memcg, | |
513 | bool lrucare) | |
7a81b88c KH |
514 | { |
515 | } | |
516 | ||
00501b53 JW |
517 | static inline void mem_cgroup_cancel_charge(struct page *page, |
518 | struct mem_cgroup *memcg) | |
7a81b88c KH |
519 | { |
520 | } | |
521 | ||
0a31bc97 | 522 | static inline void mem_cgroup_uncharge(struct page *page) |
569b846d KH |
523 | { |
524 | } | |
525 | ||
747db954 | 526 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
8a9f3ccd BS |
527 | { |
528 | } | |
529 | ||
45637bab | 530 | static inline void mem_cgroup_replace_page(struct page *old, struct page *new) |
69029cd5 KH |
531 | { |
532 | } | |
533 | ||
925b7673 JW |
534 | static inline struct lruvec *mem_cgroup_zone_lruvec(struct zone *zone, |
535 | struct mem_cgroup *memcg) | |
08e552c6 | 536 | { |
925b7673 | 537 | return &zone->lruvec; |
08e552c6 KH |
538 | } |
539 | ||
fa9add64 HD |
540 | static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, |
541 | struct zone *zone) | |
66e1707b | 542 | { |
925b7673 | 543 | return &zone->lruvec; |
66e1707b BS |
544 | } |
545 | ||
587af308 | 546 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
c0ff4b85 | 547 | struct mem_cgroup *memcg) |
bed7161a | 548 | { |
587af308 | 549 | return true; |
bed7161a BS |
550 | } |
551 | ||
ffbdccf5 DR |
552 | static inline bool task_in_mem_cgroup(struct task_struct *task, |
553 | const struct mem_cgroup *memcg) | |
4c4a2214 | 554 | { |
ffbdccf5 | 555 | return true; |
4c4a2214 DR |
556 | } |
557 | ||
5660048c JW |
558 | static inline struct mem_cgroup * |
559 | mem_cgroup_iter(struct mem_cgroup *root, | |
560 | struct mem_cgroup *prev, | |
561 | struct mem_cgroup_reclaim_cookie *reclaim) | |
562 | { | |
563 | return NULL; | |
564 | } | |
565 | ||
566 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
567 | struct mem_cgroup *prev) | |
568 | { | |
569 | } | |
570 | ||
f8d66542 HT |
571 | static inline bool mem_cgroup_disabled(void) |
572 | { | |
573 | return true; | |
574 | } | |
a636b327 | 575 | |
13308ca9 | 576 | static inline bool |
c56d5c7d | 577 | mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec) |
14797e23 | 578 | { |
13308ca9 | 579 | return true; |
14797e23 KM |
580 | } |
581 | ||
90cbc250 VD |
582 | static inline bool mem_cgroup_lruvec_online(struct lruvec *lruvec) |
583 | { | |
584 | return true; | |
585 | } | |
586 | ||
a3d8e054 | 587 | static inline unsigned long |
4d7dcca2 | 588 | mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru) |
a3d8e054 KM |
589 | { |
590 | return 0; | |
591 | } | |
592 | ||
fa9add64 HD |
593 | static inline void |
594 | mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, | |
595 | int increment) | |
3e2f41f1 | 596 | { |
3e2f41f1 KM |
597 | } |
598 | ||
e222432b BS |
599 | static inline void |
600 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) | |
601 | { | |
602 | } | |
603 | ||
6de22619 | 604 | static inline struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page) |
89c06bd5 | 605 | { |
d7365e78 | 606 | return NULL; |
89c06bd5 KH |
607 | } |
608 | ||
6de22619 | 609 | static inline void mem_cgroup_end_page_stat(struct mem_cgroup *memcg) |
89c06bd5 KH |
610 | { |
611 | } | |
612 | ||
b23afb93 TH |
613 | static inline void mem_cgroup_handle_over_high(void) |
614 | { | |
615 | } | |
616 | ||
49426420 | 617 | static inline void mem_cgroup_oom_enable(void) |
519e5247 JW |
618 | { |
619 | } | |
620 | ||
49426420 | 621 | static inline void mem_cgroup_oom_disable(void) |
519e5247 JW |
622 | { |
623 | } | |
624 | ||
3812c8c8 JW |
625 | static inline bool task_in_memcg_oom(struct task_struct *p) |
626 | { | |
627 | return false; | |
628 | } | |
629 | ||
49426420 | 630 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
3812c8c8 JW |
631 | { |
632 | return false; | |
633 | } | |
634 | ||
d7365e78 | 635 | static inline void mem_cgroup_inc_page_stat(struct mem_cgroup *memcg, |
68b4876d | 636 | enum mem_cgroup_stat_index idx) |
2a7106f2 GT |
637 | { |
638 | } | |
639 | ||
d7365e78 | 640 | static inline void mem_cgroup_dec_page_stat(struct mem_cgroup *memcg, |
68b4876d | 641 | enum mem_cgroup_stat_index idx) |
d69b042f BS |
642 | { |
643 | } | |
644 | ||
4e416953 | 645 | static inline |
0608f43d AM |
646 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
647 | gfp_t gfp_mask, | |
648 | unsigned long *total_scanned) | |
4e416953 | 649 | { |
0608f43d | 650 | return 0; |
4e416953 BS |
651 | } |
652 | ||
e94c8a9c | 653 | static inline void mem_cgroup_split_huge_fixup(struct page *head) |
ca3e0214 KH |
654 | { |
655 | } | |
656 | ||
456f998e YH |
657 | static inline |
658 | void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx) | |
659 | { | |
660 | } | |
c255a458 | 661 | #endif /* CONFIG_MEMCG */ |
78fb7466 | 662 | |
52ebea74 | 663 | #ifdef CONFIG_CGROUP_WRITEBACK |
841710aa | 664 | |
52ebea74 | 665 | struct list_head *mem_cgroup_cgwb_list(struct mem_cgroup *memcg); |
841710aa | 666 | struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb); |
c5edf9cd TH |
667 | void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages, |
668 | unsigned long *pheadroom, unsigned long *pdirty, | |
669 | unsigned long *pwriteback); | |
841710aa TH |
670 | |
671 | #else /* CONFIG_CGROUP_WRITEBACK */ | |
672 | ||
673 | static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb) | |
674 | { | |
675 | return NULL; | |
676 | } | |
677 | ||
c2aa723a | 678 | static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb, |
c5edf9cd TH |
679 | unsigned long *pfilepages, |
680 | unsigned long *pheadroom, | |
c2aa723a TH |
681 | unsigned long *pdirty, |
682 | unsigned long *pwriteback) | |
683 | { | |
684 | } | |
685 | ||
841710aa | 686 | #endif /* CONFIG_CGROUP_WRITEBACK */ |
52ebea74 | 687 | |
e1aab161 | 688 | struct sock; |
e1aab161 GC |
689 | void sock_update_memcg(struct sock *sk); |
690 | void sock_release_memcg(struct sock *sk); | |
e805605c JW |
691 | bool mem_cgroup_charge_skmem(struct cg_proto *proto, unsigned int nr_pages); |
692 | void mem_cgroup_uncharge_skmem(struct cg_proto *proto, unsigned int nr_pages); | |
693 | #if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_INET) | |
694 | static inline bool mem_cgroup_under_socket_pressure(struct cg_proto *proto) | |
695 | { | |
696 | return proto->memory_pressure; | |
697 | } | |
698 | #else | |
699 | static inline bool mem_cgroup_under_pressure(struct cg_proto *proto) | |
700 | { | |
701 | return false; | |
702 | } | |
703 | #endif | |
7ae1e1d0 GC |
704 | |
705 | #ifdef CONFIG_MEMCG_KMEM | |
a8964b9b | 706 | extern struct static_key memcg_kmem_enabled_key; |
749c5415 | 707 | |
dbcf73e2 | 708 | extern int memcg_nr_cache_ids; |
64219994 MH |
709 | void memcg_get_cache_ids(void); |
710 | void memcg_put_cache_ids(void); | |
ebe945c2 GC |
711 | |
712 | /* | |
713 | * Helper macro to loop through all memcg-specific caches. Callers must still | |
714 | * check if the cache is valid (it is either valid or NULL). | |
715 | * the slab_mutex must be held when looping through those caches | |
716 | */ | |
749c5415 | 717 | #define for_each_memcg_cache_index(_idx) \ |
dbcf73e2 | 718 | for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++) |
749c5415 | 719 | |
7ae1e1d0 GC |
720 | static inline bool memcg_kmem_enabled(void) |
721 | { | |
a8964b9b | 722 | return static_key_false(&memcg_kmem_enabled_key); |
7ae1e1d0 GC |
723 | } |
724 | ||
33398cf2 MH |
725 | static inline bool memcg_kmem_is_active(struct mem_cgroup *memcg) |
726 | { | |
727 | return memcg->kmem_acct_active; | |
728 | } | |
cb731d6c | 729 | |
7ae1e1d0 GC |
730 | /* |
731 | * In general, we'll do everything in our power to not incur in any overhead | |
732 | * for non-memcg users for the kmem functions. Not even a function call, if we | |
733 | * can avoid it. | |
734 | * | |
735 | * Therefore, we'll inline all those functions so that in the best case, we'll | |
736 | * see that kmemcg is off for everybody and proceed quickly. If it is on, | |
737 | * we'll still do most of the flag checking inline. We check a lot of | |
738 | * conditions, but because they are pretty simple, they are expected to be | |
739 | * fast. | |
740 | */ | |
f3ccb2c4 VD |
741 | int __memcg_kmem_charge_memcg(struct page *page, gfp_t gfp, int order, |
742 | struct mem_cgroup *memcg); | |
d05e83a6 VD |
743 | int __memcg_kmem_charge(struct page *page, gfp_t gfp, int order); |
744 | void __memcg_kmem_uncharge(struct page *page, int order); | |
7ae1e1d0 | 745 | |
33398cf2 MH |
746 | /* |
747 | * helper for acessing a memcg's index. It will be used as an index in the | |
748 | * child cache array in kmem_cache, and also to derive its name. This function | |
749 | * will return -1 when this is not a kmem-limited memcg. | |
750 | */ | |
751 | static inline int memcg_cache_id(struct mem_cgroup *memcg) | |
752 | { | |
753 | return memcg ? memcg->kmemcg_id : -1; | |
754 | } | |
5722d094 | 755 | |
230e9fc2 | 756 | struct kmem_cache *__memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp); |
8135be5a | 757 | void __memcg_kmem_put_cache(struct kmem_cache *cachep); |
d7f25f8a | 758 | |
230e9fc2 | 759 | static inline bool __memcg_kmem_bypass(void) |
7ae1e1d0 GC |
760 | { |
761 | if (!memcg_kmem_enabled()) | |
762 | return true; | |
7ae1e1d0 GC |
763 | if (in_interrupt() || (!current->mm) || (current->flags & PF_KTHREAD)) |
764 | return true; | |
cbfb4798 | 765 | return false; |
7ae1e1d0 GC |
766 | } |
767 | ||
768 | /** | |
d05e83a6 VD |
769 | * memcg_kmem_charge: charge a kmem page |
770 | * @page: page to charge | |
771 | * @gfp: reclaim mode | |
772 | * @order: allocation order | |
cbfb4798 | 773 | * |
d05e83a6 | 774 | * Returns 0 on success, an error code on failure. |
7ae1e1d0 | 775 | */ |
d05e83a6 VD |
776 | static __always_inline int memcg_kmem_charge(struct page *page, |
777 | gfp_t gfp, int order) | |
7ae1e1d0 | 778 | { |
230e9fc2 VD |
779 | if (__memcg_kmem_bypass()) |
780 | return 0; | |
781 | if (!(gfp & __GFP_ACCOUNT)) | |
d05e83a6 VD |
782 | return 0; |
783 | return __memcg_kmem_charge(page, gfp, order); | |
7ae1e1d0 GC |
784 | } |
785 | ||
786 | /** | |
d05e83a6 VD |
787 | * memcg_kmem_uncharge: uncharge a kmem page |
788 | * @page: page to uncharge | |
789 | * @order: allocation order | |
7ae1e1d0 | 790 | */ |
d05e83a6 | 791 | static __always_inline void memcg_kmem_uncharge(struct page *page, int order) |
7ae1e1d0 | 792 | { |
7ae1e1d0 | 793 | if (memcg_kmem_enabled()) |
d05e83a6 | 794 | __memcg_kmem_uncharge(page, order); |
7ae1e1d0 GC |
795 | } |
796 | ||
d7f25f8a GC |
797 | /** |
798 | * memcg_kmem_get_cache: selects the correct per-memcg cache for allocation | |
799 | * @cachep: the original global kmem cache | |
d7f25f8a | 800 | * |
5dfb4175 | 801 | * All memory allocated from a per-memcg cache is charged to the owner memcg. |
d7f25f8a GC |
802 | */ |
803 | static __always_inline struct kmem_cache * | |
804 | memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp) | |
805 | { | |
230e9fc2 | 806 | if (__memcg_kmem_bypass()) |
d7f25f8a | 807 | return cachep; |
230e9fc2 | 808 | return __memcg_kmem_get_cache(cachep, gfp); |
d7f25f8a | 809 | } |
8135be5a VD |
810 | |
811 | static __always_inline void memcg_kmem_put_cache(struct kmem_cache *cachep) | |
812 | { | |
813 | if (memcg_kmem_enabled()) | |
814 | __memcg_kmem_put_cache(cachep); | |
815 | } | |
7ae1e1d0 | 816 | #else |
749c5415 GC |
817 | #define for_each_memcg_cache_index(_idx) \ |
818 | for (; NULL; ) | |
819 | ||
b9ce5ef4 GC |
820 | static inline bool memcg_kmem_enabled(void) |
821 | { | |
822 | return false; | |
823 | } | |
824 | ||
cb731d6c VD |
825 | static inline bool memcg_kmem_is_active(struct mem_cgroup *memcg) |
826 | { | |
827 | return false; | |
828 | } | |
829 | ||
d05e83a6 | 830 | static inline int memcg_kmem_charge(struct page *page, gfp_t gfp, int order) |
7ae1e1d0 | 831 | { |
d05e83a6 | 832 | return 0; |
7ae1e1d0 GC |
833 | } |
834 | ||
d05e83a6 | 835 | static inline void memcg_kmem_uncharge(struct page *page, int order) |
7ae1e1d0 GC |
836 | { |
837 | } | |
2633d7a0 GC |
838 | |
839 | static inline int memcg_cache_id(struct mem_cgroup *memcg) | |
840 | { | |
841 | return -1; | |
842 | } | |
843 | ||
05257a1a VD |
844 | static inline void memcg_get_cache_ids(void) |
845 | { | |
846 | } | |
847 | ||
848 | static inline void memcg_put_cache_ids(void) | |
849 | { | |
850 | } | |
851 | ||
d7f25f8a GC |
852 | static inline struct kmem_cache * |
853 | memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp) | |
854 | { | |
855 | return cachep; | |
856 | } | |
8135be5a VD |
857 | |
858 | static inline void memcg_kmem_put_cache(struct kmem_cache *cachep) | |
859 | { | |
860 | } | |
7ae1e1d0 | 861 | #endif /* CONFIG_MEMCG_KMEM */ |
8cdea7c0 | 862 | #endif /* _LINUX_MEMCONTROL_H */ |