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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 | ||
88 | /* | |
89 | * Bits in struct cg_proto.flags | |
90 | */ | |
91 | enum cg_proto_flags { | |
92 | /* Currently active and new sockets should be assigned to cgroups */ | |
93 | MEMCG_SOCK_ACTIVE, | |
94 | /* It was ever activated; we must disarm static keys on destruction */ | |
95 | MEMCG_SOCK_ACTIVATED, | |
96 | }; | |
97 | ||
98 | struct cg_proto { | |
99 | struct page_counter memory_allocated; /* Current allocated memory. */ | |
100 | struct percpu_counter sockets_allocated; /* Current number of sockets. */ | |
101 | int memory_pressure; | |
102 | long sysctl_mem[3]; | |
103 | unsigned long flags; | |
104 | /* | |
105 | * memcg field is used to find which memcg we belong directly | |
106 | * Each memcg struct can hold more than one cg_proto, so container_of | |
107 | * won't really cut. | |
108 | * | |
109 | * The elegant solution would be having an inverse function to | |
110 | * proto_cgroup in struct proto, but that means polluting the structure | |
111 | * for everybody, instead of just for memcg users. | |
112 | */ | |
113 | struct mem_cgroup *memcg; | |
114 | }; | |
115 | ||
c255a458 | 116 | #ifdef CONFIG_MEMCG |
33398cf2 MH |
117 | struct mem_cgroup_stat_cpu { |
118 | long count[MEM_CGROUP_STAT_NSTATS]; | |
119 | unsigned long events[MEMCG_NR_EVENTS]; | |
120 | unsigned long nr_page_events; | |
121 | unsigned long targets[MEM_CGROUP_NTARGETS]; | |
122 | }; | |
123 | ||
124 | struct mem_cgroup_reclaim_iter { | |
125 | struct mem_cgroup *position; | |
126 | /* scan generation, increased every round-trip */ | |
127 | unsigned int generation; | |
128 | }; | |
129 | ||
130 | /* | |
131 | * per-zone information in memory controller. | |
132 | */ | |
133 | struct mem_cgroup_per_zone { | |
134 | struct lruvec lruvec; | |
135 | unsigned long lru_size[NR_LRU_LISTS]; | |
136 | ||
137 | struct mem_cgroup_reclaim_iter iter[DEF_PRIORITY + 1]; | |
138 | ||
139 | struct rb_node tree_node; /* RB tree node */ | |
140 | unsigned long usage_in_excess;/* Set to the value by which */ | |
141 | /* the soft limit is exceeded*/ | |
142 | bool on_tree; | |
143 | struct mem_cgroup *memcg; /* Back pointer, we cannot */ | |
144 | /* use container_of */ | |
145 | }; | |
146 | ||
147 | struct mem_cgroup_per_node { | |
148 | struct mem_cgroup_per_zone zoneinfo[MAX_NR_ZONES]; | |
149 | }; | |
150 | ||
151 | struct mem_cgroup_threshold { | |
152 | struct eventfd_ctx *eventfd; | |
153 | unsigned long threshold; | |
154 | }; | |
155 | ||
156 | /* For threshold */ | |
157 | struct mem_cgroup_threshold_ary { | |
158 | /* An array index points to threshold just below or equal to usage. */ | |
159 | int current_threshold; | |
160 | /* Size of entries[] */ | |
161 | unsigned int size; | |
162 | /* Array of thresholds */ | |
163 | struct mem_cgroup_threshold entries[0]; | |
164 | }; | |
165 | ||
166 | struct mem_cgroup_thresholds { | |
167 | /* Primary thresholds array */ | |
168 | struct mem_cgroup_threshold_ary *primary; | |
169 | /* | |
170 | * Spare threshold array. | |
171 | * This is needed to make mem_cgroup_unregister_event() "never fail". | |
172 | * It must be able to store at least primary->size - 1 entries. | |
173 | */ | |
174 | struct mem_cgroup_threshold_ary *spare; | |
175 | }; | |
176 | ||
177 | /* | |
178 | * The memory controller data structure. The memory controller controls both | |
179 | * page cache and RSS per cgroup. We would eventually like to provide | |
180 | * statistics based on the statistics developed by Rik Van Riel for clock-pro, | |
181 | * to help the administrator determine what knobs to tune. | |
182 | */ | |
183 | struct mem_cgroup { | |
184 | struct cgroup_subsys_state css; | |
185 | ||
186 | /* Accounted resources */ | |
187 | struct page_counter memory; | |
188 | struct page_counter memsw; | |
189 | struct page_counter kmem; | |
190 | ||
191 | /* Normal memory consumption range */ | |
192 | unsigned long low; | |
193 | unsigned long high; | |
194 | ||
195 | unsigned long soft_limit; | |
196 | ||
197 | /* vmpressure notifications */ | |
198 | struct vmpressure vmpressure; | |
199 | ||
200 | /* css_online() has been completed */ | |
201 | int initialized; | |
202 | ||
203 | /* | |
204 | * Should the accounting and control be hierarchical, per subtree? | |
205 | */ | |
206 | bool use_hierarchy; | |
207 | ||
208 | /* protected by memcg_oom_lock */ | |
209 | bool oom_lock; | |
210 | int under_oom; | |
211 | ||
212 | int swappiness; | |
213 | /* OOM-Killer disable */ | |
214 | int oom_kill_disable; | |
215 | ||
216 | /* protect arrays of thresholds */ | |
217 | struct mutex thresholds_lock; | |
218 | ||
219 | /* thresholds for memory usage. RCU-protected */ | |
220 | struct mem_cgroup_thresholds thresholds; | |
221 | ||
222 | /* thresholds for mem+swap usage. RCU-protected */ | |
223 | struct mem_cgroup_thresholds memsw_thresholds; | |
224 | ||
225 | /* For oom notifier event fd */ | |
226 | struct list_head oom_notify; | |
227 | ||
228 | /* | |
229 | * Should we move charges of a task when a task is moved into this | |
230 | * mem_cgroup ? And what type of charges should we move ? | |
231 | */ | |
232 | unsigned long move_charge_at_immigrate; | |
233 | /* | |
234 | * set > 0 if pages under this cgroup are moving to other cgroup. | |
235 | */ | |
236 | atomic_t moving_account; | |
237 | /* taken only while moving_account > 0 */ | |
238 | spinlock_t move_lock; | |
239 | struct task_struct *move_lock_task; | |
240 | unsigned long move_lock_flags; | |
241 | /* | |
242 | * percpu counter. | |
243 | */ | |
244 | struct mem_cgroup_stat_cpu __percpu *stat; | |
33398cf2 MH |
245 | |
246 | #if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_INET) | |
247 | struct cg_proto tcp_mem; | |
248 | #endif | |
249 | #if defined(CONFIG_MEMCG_KMEM) | |
250 | /* Index in the kmem_cache->memcg_params.memcg_caches array */ | |
251 | int kmemcg_id; | |
252 | bool kmem_acct_activated; | |
253 | bool kmem_acct_active; | |
254 | #endif | |
255 | ||
256 | int last_scanned_node; | |
257 | #if MAX_NUMNODES > 1 | |
258 | nodemask_t scan_nodes; | |
259 | atomic_t numainfo_events; | |
260 | atomic_t numainfo_updating; | |
261 | #endif | |
262 | ||
263 | #ifdef CONFIG_CGROUP_WRITEBACK | |
264 | struct list_head cgwb_list; | |
265 | struct wb_domain cgwb_domain; | |
266 | #endif | |
267 | ||
268 | /* List of events which userspace want to receive */ | |
269 | struct list_head event_list; | |
270 | spinlock_t event_list_lock; | |
271 | ||
272 | struct mem_cgroup_per_node *nodeinfo[0]; | |
273 | /* WARNING: nodeinfo must be the last member here */ | |
274 | }; | |
56161634 TH |
275 | extern struct cgroup_subsys_state *mem_cgroup_root_css; |
276 | ||
33398cf2 MH |
277 | /** |
278 | * mem_cgroup_events - count memory events against a cgroup | |
279 | * @memcg: the memory cgroup | |
280 | * @idx: the event index | |
281 | * @nr: the number of events to account for | |
282 | */ | |
283 | static inline void mem_cgroup_events(struct mem_cgroup *memcg, | |
241994ed | 284 | enum mem_cgroup_events_index idx, |
33398cf2 MH |
285 | unsigned int nr) |
286 | { | |
287 | this_cpu_add(memcg->stat->events[idx], nr); | |
288 | } | |
241994ed JW |
289 | |
290 | bool mem_cgroup_low(struct mem_cgroup *root, struct mem_cgroup *memcg); | |
291 | ||
00501b53 JW |
292 | int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
293 | gfp_t gfp_mask, struct mem_cgroup **memcgp); | |
294 | void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg, | |
295 | bool lrucare); | |
296 | void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg); | |
0a31bc97 | 297 | void mem_cgroup_uncharge(struct page *page); |
747db954 | 298 | void mem_cgroup_uncharge_list(struct list_head *page_list); |
569b846d | 299 | |
0a31bc97 JW |
300 | void mem_cgroup_migrate(struct page *oldpage, struct page *newpage, |
301 | bool lrucare); | |
569b846d | 302 | |
0a31bc97 JW |
303 | struct lruvec *mem_cgroup_zone_lruvec(struct zone *, struct mem_cgroup *); |
304 | struct lruvec *mem_cgroup_page_lruvec(struct page *, struct zone *); | |
c9b0ed51 | 305 | |
2314b42d | 306 | bool task_in_mem_cgroup(struct task_struct *task, struct mem_cgroup *memcg); |
64219994 | 307 | struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
64219994 | 308 | struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg); |
e993d905 | 309 | |
33398cf2 MH |
310 | static inline |
311 | struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){ | |
312 | return css ? container_of(css, struct mem_cgroup, css) : NULL; | |
313 | } | |
314 | ||
315 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, | |
316 | struct mem_cgroup *, | |
317 | struct mem_cgroup_reclaim_cookie *); | |
318 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); | |
319 | ||
320 | static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, | |
321 | struct mem_cgroup *root) | |
322 | { | |
323 | if (root == memcg) | |
324 | return true; | |
325 | if (!root->use_hierarchy) | |
326 | return false; | |
327 | return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup); | |
328 | } | |
e1aab161 | 329 | |
2314b42d JW |
330 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
331 | struct mem_cgroup *memcg) | |
2e4d4091 | 332 | { |
587af308 | 333 | struct mem_cgroup *task_memcg; |
413918bb | 334 | bool match = false; |
c3ac9a8a | 335 | |
2e4d4091 | 336 | rcu_read_lock(); |
587af308 | 337 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
413918bb | 338 | if (task_memcg) |
2314b42d | 339 | match = mem_cgroup_is_descendant(task_memcg, memcg); |
2e4d4091 | 340 | rcu_read_unlock(); |
c3ac9a8a | 341 | return match; |
2e4d4091 | 342 | } |
8a9f3ccd | 343 | |
64219994 | 344 | struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page); |
2fc04524 | 345 | ino_t page_cgroup_ino(struct page *page); |
d324236b | 346 | |
33398cf2 MH |
347 | static inline bool mem_cgroup_disabled(void) |
348 | { | |
349 | if (memory_cgrp_subsys.disabled) | |
350 | return true; | |
351 | return false; | |
352 | } | |
5660048c | 353 | |
58ae83db KH |
354 | /* |
355 | * For memory reclaim. | |
356 | */ | |
889976db | 357 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
33398cf2 MH |
358 | |
359 | void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, | |
360 | int nr_pages); | |
361 | ||
362 | static inline bool mem_cgroup_lruvec_online(struct lruvec *lruvec) | |
363 | { | |
364 | struct mem_cgroup_per_zone *mz; | |
365 | struct mem_cgroup *memcg; | |
366 | ||
367 | if (mem_cgroup_disabled()) | |
368 | return true; | |
369 | ||
370 | mz = container_of(lruvec, struct mem_cgroup_per_zone, lruvec); | |
371 | memcg = mz->memcg; | |
372 | ||
373 | return !!(memcg->css.flags & CSS_ONLINE); | |
374 | } | |
375 | ||
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 | ||
385 | static inline int mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec) | |
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 | ||
64219994 MH |
404 | void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, |
405 | struct task_struct *p); | |
58ae83db | 406 | |
49426420 | 407 | static inline void mem_cgroup_oom_enable(void) |
519e5247 | 408 | { |
49426420 JW |
409 | WARN_ON(current->memcg_oom.may_oom); |
410 | current->memcg_oom.may_oom = 1; | |
519e5247 JW |
411 | } |
412 | ||
49426420 | 413 | static inline void mem_cgroup_oom_disable(void) |
519e5247 | 414 | { |
49426420 JW |
415 | WARN_ON(!current->memcg_oom.may_oom); |
416 | current->memcg_oom.may_oom = 0; | |
519e5247 JW |
417 | } |
418 | ||
3812c8c8 JW |
419 | static inline bool task_in_memcg_oom(struct task_struct *p) |
420 | { | |
49426420 | 421 | return p->memcg_oom.memcg; |
3812c8c8 JW |
422 | } |
423 | ||
49426420 | 424 | bool mem_cgroup_oom_synchronize(bool wait); |
3812c8c8 | 425 | |
c255a458 | 426 | #ifdef CONFIG_MEMCG_SWAP |
c077719b KH |
427 | extern int do_swap_account; |
428 | #endif | |
f8d66542 | 429 | |
6de22619 | 430 | struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page); |
6de22619 | 431 | void mem_cgroup_end_page_stat(struct mem_cgroup *memcg); |
d7365e78 | 432 | |
33398cf2 MH |
433 | /** |
434 | * mem_cgroup_update_page_stat - update page state statistics | |
435 | * @memcg: memcg to account against | |
436 | * @idx: page state item to account | |
437 | * @val: number of pages (positive or negative) | |
438 | * | |
439 | * See mem_cgroup_begin_page_stat() for locking requirements. | |
440 | */ | |
441 | static inline void mem_cgroup_update_page_stat(struct mem_cgroup *memcg, | |
442 | enum mem_cgroup_stat_index idx, int val) | |
443 | { | |
444 | VM_BUG_ON(!rcu_read_lock_held()); | |
445 | ||
446 | if (memcg) | |
447 | this_cpu_add(memcg->stat->count[idx], val); | |
448 | } | |
449 | ||
d7365e78 | 450 | static inline void mem_cgroup_inc_page_stat(struct mem_cgroup *memcg, |
68b4876d | 451 | enum mem_cgroup_stat_index idx) |
2a7106f2 | 452 | { |
d7365e78 | 453 | mem_cgroup_update_page_stat(memcg, idx, 1); |
2a7106f2 GT |
454 | } |
455 | ||
d7365e78 | 456 | static inline void mem_cgroup_dec_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 | ||
0608f43d AM |
462 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
463 | gfp_t gfp_mask, | |
464 | unsigned long *total_scanned); | |
a63d83f4 | 465 | |
68ae564b DR |
466 | static inline void mem_cgroup_count_vm_event(struct mm_struct *mm, |
467 | enum vm_event_item idx) | |
468 | { | |
33398cf2 MH |
469 | struct mem_cgroup *memcg; |
470 | ||
68ae564b DR |
471 | if (mem_cgroup_disabled()) |
472 | return; | |
33398cf2 MH |
473 | |
474 | rcu_read_lock(); | |
475 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
476 | if (unlikely(!memcg)) | |
477 | goto out; | |
478 | ||
479 | switch (idx) { | |
480 | case PGFAULT: | |
481 | this_cpu_inc(memcg->stat->events[MEM_CGROUP_EVENTS_PGFAULT]); | |
482 | break; | |
483 | case PGMAJFAULT: | |
484 | this_cpu_inc(memcg->stat->events[MEM_CGROUP_EVENTS_PGMAJFAULT]); | |
485 | break; | |
486 | default: | |
487 | BUG(); | |
488 | } | |
489 | out: | |
490 | rcu_read_unlock(); | |
68ae564b | 491 | } |
ca3e0214 | 492 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
e94c8a9c | 493 | void mem_cgroup_split_huge_fixup(struct page *head); |
ca3e0214 KH |
494 | #endif |
495 | ||
c255a458 | 496 | #else /* CONFIG_MEMCG */ |
7a81b88c KH |
497 | struct mem_cgroup; |
498 | ||
241994ed JW |
499 | static inline void mem_cgroup_events(struct mem_cgroup *memcg, |
500 | enum mem_cgroup_events_index idx, | |
501 | unsigned int nr) | |
502 | { | |
503 | } | |
504 | ||
505 | static inline bool mem_cgroup_low(struct mem_cgroup *root, | |
506 | struct mem_cgroup *memcg) | |
507 | { | |
508 | return false; | |
509 | } | |
510 | ||
00501b53 JW |
511 | static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
512 | gfp_t gfp_mask, | |
513 | struct mem_cgroup **memcgp) | |
7a81b88c | 514 | { |
00501b53 | 515 | *memcgp = NULL; |
7a81b88c KH |
516 | return 0; |
517 | } | |
518 | ||
00501b53 JW |
519 | static inline void mem_cgroup_commit_charge(struct page *page, |
520 | struct mem_cgroup *memcg, | |
521 | bool lrucare) | |
7a81b88c KH |
522 | { |
523 | } | |
524 | ||
00501b53 JW |
525 | static inline void mem_cgroup_cancel_charge(struct page *page, |
526 | struct mem_cgroup *memcg) | |
7a81b88c KH |
527 | { |
528 | } | |
529 | ||
0a31bc97 | 530 | static inline void mem_cgroup_uncharge(struct page *page) |
569b846d KH |
531 | { |
532 | } | |
533 | ||
747db954 | 534 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
8a9f3ccd BS |
535 | { |
536 | } | |
537 | ||
0a31bc97 JW |
538 | static inline void mem_cgroup_migrate(struct page *oldpage, |
539 | struct page *newpage, | |
540 | bool lrucare) | |
69029cd5 KH |
541 | { |
542 | } | |
543 | ||
925b7673 JW |
544 | static inline struct lruvec *mem_cgroup_zone_lruvec(struct zone *zone, |
545 | struct mem_cgroup *memcg) | |
08e552c6 | 546 | { |
925b7673 | 547 | return &zone->lruvec; |
08e552c6 KH |
548 | } |
549 | ||
fa9add64 HD |
550 | static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, |
551 | struct zone *zone) | |
66e1707b | 552 | { |
925b7673 | 553 | return &zone->lruvec; |
66e1707b BS |
554 | } |
555 | ||
587af308 | 556 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
c0ff4b85 | 557 | struct mem_cgroup *memcg) |
bed7161a | 558 | { |
587af308 | 559 | return true; |
bed7161a BS |
560 | } |
561 | ||
ffbdccf5 DR |
562 | static inline bool task_in_mem_cgroup(struct task_struct *task, |
563 | const struct mem_cgroup *memcg) | |
4c4a2214 | 564 | { |
ffbdccf5 | 565 | return true; |
4c4a2214 DR |
566 | } |
567 | ||
5660048c JW |
568 | static inline struct mem_cgroup * |
569 | mem_cgroup_iter(struct mem_cgroup *root, | |
570 | struct mem_cgroup *prev, | |
571 | struct mem_cgroup_reclaim_cookie *reclaim) | |
572 | { | |
573 | return NULL; | |
574 | } | |
575 | ||
576 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
577 | struct mem_cgroup *prev) | |
578 | { | |
579 | } | |
580 | ||
f8d66542 HT |
581 | static inline bool mem_cgroup_disabled(void) |
582 | { | |
583 | return true; | |
584 | } | |
a636b327 | 585 | |
14797e23 | 586 | static inline int |
c56d5c7d | 587 | mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec) |
14797e23 KM |
588 | { |
589 | return 1; | |
590 | } | |
591 | ||
90cbc250 VD |
592 | static inline bool mem_cgroup_lruvec_online(struct lruvec *lruvec) |
593 | { | |
594 | return true; | |
595 | } | |
596 | ||
a3d8e054 | 597 | static inline unsigned long |
4d7dcca2 | 598 | mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru) |
a3d8e054 KM |
599 | { |
600 | return 0; | |
601 | } | |
602 | ||
fa9add64 HD |
603 | static inline void |
604 | mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, | |
605 | int increment) | |
3e2f41f1 | 606 | { |
3e2f41f1 KM |
607 | } |
608 | ||
e222432b BS |
609 | static inline void |
610 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) | |
611 | { | |
612 | } | |
613 | ||
6de22619 | 614 | static inline struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page) |
89c06bd5 | 615 | { |
d7365e78 | 616 | return NULL; |
89c06bd5 KH |
617 | } |
618 | ||
6de22619 | 619 | static inline void mem_cgroup_end_page_stat(struct mem_cgroup *memcg) |
89c06bd5 KH |
620 | { |
621 | } | |
622 | ||
49426420 | 623 | static inline void mem_cgroup_oom_enable(void) |
519e5247 JW |
624 | { |
625 | } | |
626 | ||
49426420 | 627 | static inline void mem_cgroup_oom_disable(void) |
519e5247 JW |
628 | { |
629 | } | |
630 | ||
3812c8c8 JW |
631 | static inline bool task_in_memcg_oom(struct task_struct *p) |
632 | { | |
633 | return false; | |
634 | } | |
635 | ||
49426420 | 636 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
3812c8c8 JW |
637 | { |
638 | return false; | |
639 | } | |
640 | ||
d7365e78 | 641 | static inline void mem_cgroup_inc_page_stat(struct mem_cgroup *memcg, |
68b4876d | 642 | enum mem_cgroup_stat_index idx) |
2a7106f2 GT |
643 | { |
644 | } | |
645 | ||
d7365e78 | 646 | static inline void mem_cgroup_dec_page_stat(struct mem_cgroup *memcg, |
68b4876d | 647 | enum mem_cgroup_stat_index idx) |
d69b042f BS |
648 | { |
649 | } | |
650 | ||
4e416953 | 651 | static inline |
0608f43d AM |
652 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
653 | gfp_t gfp_mask, | |
654 | unsigned long *total_scanned) | |
4e416953 | 655 | { |
0608f43d | 656 | return 0; |
4e416953 BS |
657 | } |
658 | ||
e94c8a9c | 659 | static inline void mem_cgroup_split_huge_fixup(struct page *head) |
ca3e0214 KH |
660 | { |
661 | } | |
662 | ||
456f998e YH |
663 | static inline |
664 | void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx) | |
665 | { | |
666 | } | |
c255a458 | 667 | #endif /* CONFIG_MEMCG */ |
78fb7466 | 668 | |
e1aab161 GC |
669 | enum { |
670 | UNDER_LIMIT, | |
671 | SOFT_LIMIT, | |
672 | OVER_LIMIT, | |
673 | }; | |
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); |
c2aa723a TH |
679 | void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pavail, |
680 | unsigned long *pdirty, unsigned long *pwriteback); | |
841710aa TH |
681 | |
682 | #else /* CONFIG_CGROUP_WRITEBACK */ | |
683 | ||
684 | static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb) | |
685 | { | |
686 | return NULL; | |
687 | } | |
688 | ||
c2aa723a TH |
689 | static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb, |
690 | unsigned long *pavail, | |
691 | unsigned long *pdirty, | |
692 | unsigned long *pwriteback) | |
693 | { | |
694 | } | |
695 | ||
841710aa | 696 | #endif /* CONFIG_CGROUP_WRITEBACK */ |
52ebea74 | 697 | |
e1aab161 | 698 | struct sock; |
cd59085a | 699 | #if defined(CONFIG_INET) && defined(CONFIG_MEMCG_KMEM) |
e1aab161 GC |
700 | void sock_update_memcg(struct sock *sk); |
701 | void sock_release_memcg(struct sock *sk); | |
702 | #else | |
703 | static inline void sock_update_memcg(struct sock *sk) | |
704 | { | |
705 | } | |
706 | static inline void sock_release_memcg(struct sock *sk) | |
707 | { | |
708 | } | |
cd59085a | 709 | #endif /* CONFIG_INET && CONFIG_MEMCG_KMEM */ |
7ae1e1d0 GC |
710 | |
711 | #ifdef CONFIG_MEMCG_KMEM | |
a8964b9b | 712 | extern struct static_key memcg_kmem_enabled_key; |
749c5415 | 713 | |
dbcf73e2 | 714 | extern int memcg_nr_cache_ids; |
64219994 MH |
715 | void memcg_get_cache_ids(void); |
716 | void memcg_put_cache_ids(void); | |
ebe945c2 GC |
717 | |
718 | /* | |
719 | * Helper macro to loop through all memcg-specific caches. Callers must still | |
720 | * check if the cache is valid (it is either valid or NULL). | |
721 | * the slab_mutex must be held when looping through those caches | |
722 | */ | |
749c5415 | 723 | #define for_each_memcg_cache_index(_idx) \ |
dbcf73e2 | 724 | for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++) |
749c5415 | 725 | |
7ae1e1d0 GC |
726 | static inline bool memcg_kmem_enabled(void) |
727 | { | |
a8964b9b | 728 | return static_key_false(&memcg_kmem_enabled_key); |
7ae1e1d0 GC |
729 | } |
730 | ||
33398cf2 MH |
731 | static inline bool memcg_kmem_is_active(struct mem_cgroup *memcg) |
732 | { | |
733 | return memcg->kmem_acct_active; | |
734 | } | |
cb731d6c | 735 | |
7ae1e1d0 GC |
736 | /* |
737 | * In general, we'll do everything in our power to not incur in any overhead | |
738 | * for non-memcg users for the kmem functions. Not even a function call, if we | |
739 | * can avoid it. | |
740 | * | |
741 | * Therefore, we'll inline all those functions so that in the best case, we'll | |
742 | * see that kmemcg is off for everybody and proceed quickly. If it is on, | |
743 | * we'll still do most of the flag checking inline. We check a lot of | |
744 | * conditions, but because they are pretty simple, they are expected to be | |
745 | * fast. | |
746 | */ | |
747 | bool __memcg_kmem_newpage_charge(gfp_t gfp, struct mem_cgroup **memcg, | |
748 | int order); | |
749 | void __memcg_kmem_commit_charge(struct page *page, | |
750 | struct mem_cgroup *memcg, int order); | |
751 | void __memcg_kmem_uncharge_pages(struct page *page, int order); | |
752 | ||
33398cf2 MH |
753 | /* |
754 | * helper for acessing a memcg's index. It will be used as an index in the | |
755 | * child cache array in kmem_cache, and also to derive its name. This function | |
756 | * will return -1 when this is not a kmem-limited memcg. | |
757 | */ | |
758 | static inline int memcg_cache_id(struct mem_cgroup *memcg) | |
759 | { | |
760 | return memcg ? memcg->kmemcg_id : -1; | |
761 | } | |
5722d094 | 762 | |
8135be5a VD |
763 | struct kmem_cache *__memcg_kmem_get_cache(struct kmem_cache *cachep); |
764 | void __memcg_kmem_put_cache(struct kmem_cache *cachep); | |
d7f25f8a | 765 | |
60d3fd32 VD |
766 | struct mem_cgroup *__mem_cgroup_from_kmem(void *ptr); |
767 | ||
dbf22eb6 VD |
768 | int memcg_charge_kmem(struct mem_cgroup *memcg, gfp_t gfp, |
769 | unsigned long nr_pages); | |
770 | void memcg_uncharge_kmem(struct mem_cgroup *memcg, unsigned long nr_pages); | |
5dfb4175 | 771 | |
7ae1e1d0 GC |
772 | /** |
773 | * memcg_kmem_newpage_charge: verify if a new kmem allocation is allowed. | |
774 | * @gfp: the gfp allocation flags. | |
775 | * @memcg: a pointer to the memcg this was charged against. | |
776 | * @order: allocation order. | |
777 | * | |
778 | * returns true if the memcg where the current task belongs can hold this | |
779 | * allocation. | |
780 | * | |
781 | * We return true automatically if this allocation is not to be accounted to | |
782 | * any memcg. | |
783 | */ | |
784 | static inline bool | |
785 | memcg_kmem_newpage_charge(gfp_t gfp, struct mem_cgroup **memcg, int order) | |
786 | { | |
787 | if (!memcg_kmem_enabled()) | |
788 | return true; | |
789 | ||
8f4fc071 VD |
790 | if (gfp & __GFP_NOACCOUNT) |
791 | return true; | |
7ae1e1d0 GC |
792 | /* |
793 | * __GFP_NOFAIL allocations will move on even if charging is not | |
794 | * possible. Therefore we don't even try, and have this allocation | |
3e32cb2e JW |
795 | * unaccounted. We could in theory charge it forcibly, but we hope |
796 | * those allocations are rare, and won't be worth the trouble. | |
7ae1e1d0 | 797 | */ |
52383431 | 798 | if (gfp & __GFP_NOFAIL) |
7ae1e1d0 GC |
799 | return true; |
800 | if (in_interrupt() || (!current->mm) || (current->flags & PF_KTHREAD)) | |
801 | return true; | |
802 | ||
803 | /* If the test is dying, just let it go. */ | |
804 | if (unlikely(fatal_signal_pending(current))) | |
805 | return true; | |
806 | ||
807 | return __memcg_kmem_newpage_charge(gfp, memcg, order); | |
808 | } | |
809 | ||
810 | /** | |
811 | * memcg_kmem_uncharge_pages: uncharge pages from memcg | |
812 | * @page: pointer to struct page being freed | |
813 | * @order: allocation order. | |
7ae1e1d0 GC |
814 | */ |
815 | static inline void | |
816 | memcg_kmem_uncharge_pages(struct page *page, int order) | |
817 | { | |
818 | if (memcg_kmem_enabled()) | |
819 | __memcg_kmem_uncharge_pages(page, order); | |
820 | } | |
821 | ||
822 | /** | |
823 | * memcg_kmem_commit_charge: embeds correct memcg in a page | |
824 | * @page: pointer to struct page recently allocated | |
825 | * @memcg: the memcg structure we charged against | |
826 | * @order: allocation order. | |
827 | * | |
828 | * Needs to be called after memcg_kmem_newpage_charge, regardless of success or | |
829 | * failure of the allocation. if @page is NULL, this function will revert the | |
1306a85a | 830 | * charges. Otherwise, it will commit @page to @memcg. |
7ae1e1d0 GC |
831 | */ |
832 | static inline void | |
833 | memcg_kmem_commit_charge(struct page *page, struct mem_cgroup *memcg, int order) | |
834 | { | |
835 | if (memcg_kmem_enabled() && memcg) | |
836 | __memcg_kmem_commit_charge(page, memcg, order); | |
837 | } | |
838 | ||
d7f25f8a GC |
839 | /** |
840 | * memcg_kmem_get_cache: selects the correct per-memcg cache for allocation | |
841 | * @cachep: the original global kmem cache | |
842 | * @gfp: allocation flags. | |
843 | * | |
5dfb4175 | 844 | * All memory allocated from a per-memcg cache is charged to the owner memcg. |
d7f25f8a GC |
845 | */ |
846 | static __always_inline struct kmem_cache * | |
847 | memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp) | |
848 | { | |
849 | if (!memcg_kmem_enabled()) | |
850 | return cachep; | |
8f4fc071 VD |
851 | if (gfp & __GFP_NOACCOUNT) |
852 | return cachep; | |
d7f25f8a GC |
853 | if (gfp & __GFP_NOFAIL) |
854 | return cachep; | |
855 | if (in_interrupt() || (!current->mm) || (current->flags & PF_KTHREAD)) | |
856 | return cachep; | |
857 | if (unlikely(fatal_signal_pending(current))) | |
858 | return cachep; | |
859 | ||
056b7cce | 860 | return __memcg_kmem_get_cache(cachep); |
d7f25f8a | 861 | } |
8135be5a VD |
862 | |
863 | static __always_inline void memcg_kmem_put_cache(struct kmem_cache *cachep) | |
864 | { | |
865 | if (memcg_kmem_enabled()) | |
866 | __memcg_kmem_put_cache(cachep); | |
867 | } | |
60d3fd32 VD |
868 | |
869 | static __always_inline struct mem_cgroup *mem_cgroup_from_kmem(void *ptr) | |
870 | { | |
871 | if (!memcg_kmem_enabled()) | |
872 | return NULL; | |
873 | return __mem_cgroup_from_kmem(ptr); | |
874 | } | |
7ae1e1d0 | 875 | #else |
749c5415 GC |
876 | #define for_each_memcg_cache_index(_idx) \ |
877 | for (; NULL; ) | |
878 | ||
b9ce5ef4 GC |
879 | static inline bool memcg_kmem_enabled(void) |
880 | { | |
881 | return false; | |
882 | } | |
883 | ||
cb731d6c VD |
884 | static inline bool memcg_kmem_is_active(struct mem_cgroup *memcg) |
885 | { | |
886 | return false; | |
887 | } | |
888 | ||
7ae1e1d0 GC |
889 | static inline bool |
890 | memcg_kmem_newpage_charge(gfp_t gfp, struct mem_cgroup **memcg, int order) | |
891 | { | |
892 | return true; | |
893 | } | |
894 | ||
895 | static inline void memcg_kmem_uncharge_pages(struct page *page, int order) | |
896 | { | |
897 | } | |
898 | ||
899 | static inline void | |
900 | memcg_kmem_commit_charge(struct page *page, struct mem_cgroup *memcg, int order) | |
901 | { | |
902 | } | |
2633d7a0 GC |
903 | |
904 | static inline int memcg_cache_id(struct mem_cgroup *memcg) | |
905 | { | |
906 | return -1; | |
907 | } | |
908 | ||
05257a1a VD |
909 | static inline void memcg_get_cache_ids(void) |
910 | { | |
911 | } | |
912 | ||
913 | static inline void memcg_put_cache_ids(void) | |
914 | { | |
915 | } | |
916 | ||
d7f25f8a GC |
917 | static inline struct kmem_cache * |
918 | memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp) | |
919 | { | |
920 | return cachep; | |
921 | } | |
8135be5a VD |
922 | |
923 | static inline void memcg_kmem_put_cache(struct kmem_cache *cachep) | |
924 | { | |
925 | } | |
60d3fd32 VD |
926 | |
927 | static inline struct mem_cgroup *mem_cgroup_from_kmem(void *ptr) | |
928 | { | |
929 | return NULL; | |
930 | } | |
7ae1e1d0 | 931 | #endif /* CONFIG_MEMCG_KMEM */ |
8cdea7c0 BS |
932 | #endif /* _LINUX_MEMCONTROL_H */ |
933 |