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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> | |
00f3ca2c JW |
29 | #include <linux/mm.h> |
30 | #include <linux/vmstat.h> | |
33398cf2 | 31 | #include <linux/writeback.h> |
fdf1cdb9 | 32 | #include <linux/page-flags.h> |
456f998e | 33 | |
78fb7466 | 34 | struct mem_cgroup; |
8697d331 BS |
35 | struct page; |
36 | struct mm_struct; | |
2633d7a0 | 37 | struct kmem_cache; |
78fb7466 | 38 | |
71cd3113 JW |
39 | /* Cgroup-specific page state, on top of universal node page state */ |
40 | enum memcg_stat_item { | |
41 | MEMCG_CACHE = NR_VM_NODE_STAT_ITEMS, | |
42 | MEMCG_RSS, | |
43 | MEMCG_RSS_HUGE, | |
44 | MEMCG_SWAP, | |
45 | MEMCG_SOCK, | |
46 | /* XXX: why are these zone and not node counters? */ | |
47 | MEMCG_KERNEL_STACK_KB, | |
b2807f07 | 48 | MEMCG_NR_STAT, |
2a7106f2 GT |
49 | }; |
50 | ||
71cd3113 JW |
51 | /* Cgroup-specific events, on top of universal VM events */ |
52 | enum memcg_event_item { | |
53 | MEMCG_LOW = NR_VM_EVENT_ITEMS, | |
54 | MEMCG_HIGH, | |
55 | MEMCG_MAX, | |
56 | MEMCG_OOM, | |
57 | MEMCG_NR_EVENTS, | |
58 | }; | |
59 | ||
5660048c | 60 | struct mem_cgroup_reclaim_cookie { |
ef8f2327 | 61 | pg_data_t *pgdat; |
5660048c JW |
62 | int priority; |
63 | unsigned int generation; | |
64 | }; | |
65 | ||
71cd3113 JW |
66 | #ifdef CONFIG_MEMCG |
67 | ||
68 | #define MEM_CGROUP_ID_SHIFT 16 | |
69 | #define MEM_CGROUP_ID_MAX USHRT_MAX | |
70 | ||
71 | struct mem_cgroup_id { | |
72 | int id; | |
73 | atomic_t ref; | |
74 | }; | |
75 | ||
33398cf2 MH |
76 | /* |
77 | * Per memcg event counter is incremented at every pagein/pageout. With THP, | |
78 | * it will be incremated by the number of pages. This counter is used for | |
79 | * for trigger some periodic events. This is straightforward and better | |
80 | * than using jiffies etc. to handle periodic memcg event. | |
81 | */ | |
82 | enum mem_cgroup_events_target { | |
83 | MEM_CGROUP_TARGET_THRESH, | |
84 | MEM_CGROUP_TARGET_SOFTLIMIT, | |
85 | MEM_CGROUP_TARGET_NUMAINFO, | |
86 | MEM_CGROUP_NTARGETS, | |
87 | }; | |
88 | ||
33398cf2 | 89 | struct mem_cgroup_stat_cpu { |
b2807f07 | 90 | long count[MEMCG_NR_STAT]; |
33398cf2 MH |
91 | unsigned long events[MEMCG_NR_EVENTS]; |
92 | unsigned long nr_page_events; | |
93 | unsigned long targets[MEM_CGROUP_NTARGETS]; | |
94 | }; | |
95 | ||
96 | struct mem_cgroup_reclaim_iter { | |
97 | struct mem_cgroup *position; | |
98 | /* scan generation, increased every round-trip */ | |
99 | unsigned int generation; | |
100 | }; | |
101 | ||
00f3ca2c JW |
102 | struct lruvec_stat { |
103 | long count[NR_VM_NODE_STAT_ITEMS]; | |
104 | }; | |
105 | ||
33398cf2 MH |
106 | /* |
107 | * per-zone information in memory controller. | |
108 | */ | |
ef8f2327 | 109 | struct mem_cgroup_per_node { |
33398cf2 | 110 | struct lruvec lruvec; |
a983b5eb JW |
111 | |
112 | struct lruvec_stat __percpu *lruvec_stat_cpu; | |
113 | atomic_long_t lruvec_stat[NR_VM_NODE_STAT_ITEMS]; | |
114 | ||
b4536f0c | 115 | unsigned long lru_zone_size[MAX_NR_ZONES][NR_LRU_LISTS]; |
33398cf2 MH |
116 | |
117 | struct mem_cgroup_reclaim_iter iter[DEF_PRIORITY + 1]; | |
118 | ||
119 | struct rb_node tree_node; /* RB tree node */ | |
120 | unsigned long usage_in_excess;/* Set to the value by which */ | |
121 | /* the soft limit is exceeded*/ | |
122 | bool on_tree; | |
123 | struct mem_cgroup *memcg; /* Back pointer, we cannot */ | |
124 | /* use container_of */ | |
125 | }; | |
126 | ||
33398cf2 MH |
127 | struct mem_cgroup_threshold { |
128 | struct eventfd_ctx *eventfd; | |
129 | unsigned long threshold; | |
130 | }; | |
131 | ||
132 | /* For threshold */ | |
133 | struct mem_cgroup_threshold_ary { | |
134 | /* An array index points to threshold just below or equal to usage. */ | |
135 | int current_threshold; | |
136 | /* Size of entries[] */ | |
137 | unsigned int size; | |
138 | /* Array of thresholds */ | |
139 | struct mem_cgroup_threshold entries[0]; | |
140 | }; | |
141 | ||
142 | struct mem_cgroup_thresholds { | |
143 | /* Primary thresholds array */ | |
144 | struct mem_cgroup_threshold_ary *primary; | |
145 | /* | |
146 | * Spare threshold array. | |
147 | * This is needed to make mem_cgroup_unregister_event() "never fail". | |
148 | * It must be able to store at least primary->size - 1 entries. | |
149 | */ | |
150 | struct mem_cgroup_threshold_ary *spare; | |
151 | }; | |
152 | ||
567e9ab2 JW |
153 | enum memcg_kmem_state { |
154 | KMEM_NONE, | |
155 | KMEM_ALLOCATED, | |
156 | KMEM_ONLINE, | |
157 | }; | |
158 | ||
33398cf2 MH |
159 | /* |
160 | * The memory controller data structure. The memory controller controls both | |
161 | * page cache and RSS per cgroup. We would eventually like to provide | |
162 | * statistics based on the statistics developed by Rik Van Riel for clock-pro, | |
163 | * to help the administrator determine what knobs to tune. | |
164 | */ | |
165 | struct mem_cgroup { | |
166 | struct cgroup_subsys_state css; | |
167 | ||
73f576c0 JW |
168 | /* Private memcg ID. Used to ID objects that outlive the cgroup */ |
169 | struct mem_cgroup_id id; | |
170 | ||
33398cf2 MH |
171 | /* Accounted resources */ |
172 | struct page_counter memory; | |
37e84351 | 173 | struct page_counter swap; |
0db15298 JW |
174 | |
175 | /* Legacy consumer-oriented counters */ | |
33398cf2 MH |
176 | struct page_counter memsw; |
177 | struct page_counter kmem; | |
0db15298 | 178 | struct page_counter tcpmem; |
33398cf2 MH |
179 | |
180 | /* Normal memory consumption range */ | |
181 | unsigned long low; | |
182 | unsigned long high; | |
183 | ||
f7e1cb6e JW |
184 | /* Range enforcement for interrupt charges */ |
185 | struct work_struct high_work; | |
186 | ||
33398cf2 MH |
187 | unsigned long soft_limit; |
188 | ||
189 | /* vmpressure notifications */ | |
190 | struct vmpressure vmpressure; | |
191 | ||
33398cf2 MH |
192 | /* |
193 | * Should the accounting and control be hierarchical, per subtree? | |
194 | */ | |
195 | bool use_hierarchy; | |
196 | ||
197 | /* protected by memcg_oom_lock */ | |
198 | bool oom_lock; | |
199 | int under_oom; | |
200 | ||
201 | int swappiness; | |
202 | /* OOM-Killer disable */ | |
203 | int oom_kill_disable; | |
204 | ||
472912a2 TH |
205 | /* handle for "memory.events" */ |
206 | struct cgroup_file events_file; | |
207 | ||
33398cf2 MH |
208 | /* protect arrays of thresholds */ |
209 | struct mutex thresholds_lock; | |
210 | ||
211 | /* thresholds for memory usage. RCU-protected */ | |
212 | struct mem_cgroup_thresholds thresholds; | |
213 | ||
214 | /* thresholds for mem+swap usage. RCU-protected */ | |
215 | struct mem_cgroup_thresholds memsw_thresholds; | |
216 | ||
217 | /* For oom notifier event fd */ | |
218 | struct list_head oom_notify; | |
219 | ||
220 | /* | |
221 | * Should we move charges of a task when a task is moved into this | |
222 | * mem_cgroup ? And what type of charges should we move ? | |
223 | */ | |
224 | unsigned long move_charge_at_immigrate; | |
225 | /* | |
226 | * set > 0 if pages under this cgroup are moving to other cgroup. | |
227 | */ | |
228 | atomic_t moving_account; | |
229 | /* taken only while moving_account > 0 */ | |
230 | spinlock_t move_lock; | |
231 | struct task_struct *move_lock_task; | |
232 | unsigned long move_lock_flags; | |
a983b5eb JW |
233 | |
234 | struct mem_cgroup_stat_cpu __percpu *stat_cpu; | |
235 | atomic_long_t stat[MEMCG_NR_STAT]; | |
236 | atomic_long_t events[MEMCG_NR_EVENTS]; | |
33398cf2 | 237 | |
d886f4e4 JW |
238 | unsigned long socket_pressure; |
239 | ||
240 | /* Legacy tcp memory accounting */ | |
0db15298 JW |
241 | bool tcpmem_active; |
242 | int tcpmem_pressure; | |
d886f4e4 | 243 | |
127424c8 | 244 | #ifndef CONFIG_SLOB |
33398cf2 MH |
245 | /* Index in the kmem_cache->memcg_params.memcg_caches array */ |
246 | int kmemcg_id; | |
567e9ab2 | 247 | enum memcg_kmem_state kmem_state; |
bc2791f8 | 248 | struct list_head kmem_caches; |
33398cf2 MH |
249 | #endif |
250 | ||
251 | int last_scanned_node; | |
252 | #if MAX_NUMNODES > 1 | |
253 | nodemask_t scan_nodes; | |
254 | atomic_t numainfo_events; | |
255 | atomic_t numainfo_updating; | |
256 | #endif | |
257 | ||
258 | #ifdef CONFIG_CGROUP_WRITEBACK | |
259 | struct list_head cgwb_list; | |
260 | struct wb_domain cgwb_domain; | |
261 | #endif | |
262 | ||
263 | /* List of events which userspace want to receive */ | |
264 | struct list_head event_list; | |
265 | spinlock_t event_list_lock; | |
266 | ||
267 | struct mem_cgroup_per_node *nodeinfo[0]; | |
268 | /* WARNING: nodeinfo must be the last member here */ | |
269 | }; | |
7d828602 | 270 | |
a983b5eb JW |
271 | /* |
272 | * size of first charge trial. "32" comes from vmscan.c's magic value. | |
273 | * TODO: maybe necessary to use big numbers in big irons. | |
274 | */ | |
275 | #define MEMCG_CHARGE_BATCH 32U | |
276 | ||
7d828602 | 277 | extern struct mem_cgroup *root_mem_cgroup; |
56161634 | 278 | |
23047a96 JW |
279 | static inline bool mem_cgroup_disabled(void) |
280 | { | |
281 | return !cgroup_subsys_enabled(memory_cgrp_subsys); | |
282 | } | |
283 | ||
241994ed JW |
284 | bool mem_cgroup_low(struct mem_cgroup *root, struct mem_cgroup *memcg); |
285 | ||
00501b53 | 286 | int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
f627c2f5 KS |
287 | gfp_t gfp_mask, struct mem_cgroup **memcgp, |
288 | bool compound); | |
00501b53 | 289 | void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg, |
f627c2f5 KS |
290 | bool lrucare, bool compound); |
291 | void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg, | |
292 | bool compound); | |
0a31bc97 | 293 | void mem_cgroup_uncharge(struct page *page); |
747db954 | 294 | void mem_cgroup_uncharge_list(struct list_head *page_list); |
569b846d | 295 | |
6a93ca8f | 296 | void mem_cgroup_migrate(struct page *oldpage, struct page *newpage); |
569b846d | 297 | |
ef8f2327 MG |
298 | static struct mem_cgroup_per_node * |
299 | mem_cgroup_nodeinfo(struct mem_cgroup *memcg, int nid) | |
55779ec7 | 300 | { |
ef8f2327 | 301 | return memcg->nodeinfo[nid]; |
55779ec7 JW |
302 | } |
303 | ||
304 | /** | |
a9dd0a83 MG |
305 | * mem_cgroup_lruvec - get the lru list vector for a node or a memcg zone |
306 | * @node: node of the wanted lruvec | |
55779ec7 JW |
307 | * @memcg: memcg of the wanted lruvec |
308 | * | |
a9dd0a83 MG |
309 | * Returns the lru list vector holding pages for a given @node or a given |
310 | * @memcg and @zone. This can be the node lruvec, if the memory controller | |
55779ec7 JW |
311 | * is disabled. |
312 | */ | |
a9dd0a83 | 313 | static inline struct lruvec *mem_cgroup_lruvec(struct pglist_data *pgdat, |
ef8f2327 | 314 | struct mem_cgroup *memcg) |
55779ec7 | 315 | { |
ef8f2327 | 316 | struct mem_cgroup_per_node *mz; |
55779ec7 JW |
317 | struct lruvec *lruvec; |
318 | ||
319 | if (mem_cgroup_disabled()) { | |
a9dd0a83 | 320 | lruvec = node_lruvec(pgdat); |
55779ec7 JW |
321 | goto out; |
322 | } | |
323 | ||
ef8f2327 | 324 | mz = mem_cgroup_nodeinfo(memcg, pgdat->node_id); |
55779ec7 JW |
325 | lruvec = &mz->lruvec; |
326 | out: | |
327 | /* | |
328 | * Since a node can be onlined after the mem_cgroup was created, | |
599d0c95 | 329 | * we have to be prepared to initialize lruvec->pgdat here; |
55779ec7 JW |
330 | * and if offlined then reonlined, we need to reinitialize it. |
331 | */ | |
ef8f2327 MG |
332 | if (unlikely(lruvec->pgdat != pgdat)) |
333 | lruvec->pgdat = pgdat; | |
55779ec7 JW |
334 | return lruvec; |
335 | } | |
336 | ||
599d0c95 | 337 | struct lruvec *mem_cgroup_page_lruvec(struct page *, struct pglist_data *); |
c9b0ed51 | 338 | |
2314b42d | 339 | bool task_in_mem_cgroup(struct task_struct *task, struct mem_cgroup *memcg); |
64219994 | 340 | struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
e993d905 | 341 | |
33398cf2 MH |
342 | static inline |
343 | struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){ | |
344 | return css ? container_of(css, struct mem_cgroup, css) : NULL; | |
345 | } | |
346 | ||
8e8ae645 JW |
347 | #define mem_cgroup_from_counter(counter, member) \ |
348 | container_of(counter, struct mem_cgroup, member) | |
349 | ||
33398cf2 MH |
350 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
351 | struct mem_cgroup *, | |
352 | struct mem_cgroup_reclaim_cookie *); | |
353 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); | |
7c5f64f8 VD |
354 | int mem_cgroup_scan_tasks(struct mem_cgroup *, |
355 | int (*)(struct task_struct *, void *), void *); | |
33398cf2 | 356 | |
23047a96 JW |
357 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
358 | { | |
359 | if (mem_cgroup_disabled()) | |
360 | return 0; | |
361 | ||
73f576c0 | 362 | return memcg->id.id; |
23047a96 | 363 | } |
73f576c0 | 364 | struct mem_cgroup *mem_cgroup_from_id(unsigned short id); |
23047a96 | 365 | |
2262185c RG |
366 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
367 | { | |
368 | struct mem_cgroup_per_node *mz; | |
369 | ||
370 | if (mem_cgroup_disabled()) | |
371 | return NULL; | |
372 | ||
373 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
374 | return mz->memcg; | |
375 | } | |
376 | ||
8e8ae645 JW |
377 | /** |
378 | * parent_mem_cgroup - find the accounting parent of a memcg | |
379 | * @memcg: memcg whose parent to find | |
380 | * | |
381 | * Returns the parent memcg, or NULL if this is the root or the memory | |
382 | * controller is in legacy no-hierarchy mode. | |
383 | */ | |
384 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) | |
385 | { | |
386 | if (!memcg->memory.parent) | |
387 | return NULL; | |
388 | return mem_cgroup_from_counter(memcg->memory.parent, memory); | |
389 | } | |
390 | ||
33398cf2 MH |
391 | static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, |
392 | struct mem_cgroup *root) | |
393 | { | |
394 | if (root == memcg) | |
395 | return true; | |
396 | if (!root->use_hierarchy) | |
397 | return false; | |
398 | return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup); | |
399 | } | |
e1aab161 | 400 | |
2314b42d JW |
401 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
402 | struct mem_cgroup *memcg) | |
2e4d4091 | 403 | { |
587af308 | 404 | struct mem_cgroup *task_memcg; |
413918bb | 405 | bool match = false; |
c3ac9a8a | 406 | |
2e4d4091 | 407 | rcu_read_lock(); |
587af308 | 408 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
413918bb | 409 | if (task_memcg) |
2314b42d | 410 | match = mem_cgroup_is_descendant(task_memcg, memcg); |
2e4d4091 | 411 | rcu_read_unlock(); |
c3ac9a8a | 412 | return match; |
2e4d4091 | 413 | } |
8a9f3ccd | 414 | |
64219994 | 415 | struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page); |
2fc04524 | 416 | ino_t page_cgroup_ino(struct page *page); |
d324236b | 417 | |
eb01aaab VD |
418 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
419 | { | |
420 | if (mem_cgroup_disabled()) | |
421 | return true; | |
422 | return !!(memcg->css.flags & CSS_ONLINE); | |
423 | } | |
424 | ||
58ae83db KH |
425 | /* |
426 | * For memory reclaim. | |
427 | */ | |
889976db | 428 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
33398cf2 MH |
429 | |
430 | void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, | |
b4536f0c | 431 | int zid, int nr_pages); |
33398cf2 | 432 | |
0a6b76dd VD |
433 | unsigned long mem_cgroup_node_nr_lru_pages(struct mem_cgroup *memcg, |
434 | int nid, unsigned int lru_mask); | |
435 | ||
33398cf2 MH |
436 | static inline |
437 | unsigned long mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru) | |
438 | { | |
ef8f2327 | 439 | struct mem_cgroup_per_node *mz; |
b4536f0c MH |
440 | unsigned long nr_pages = 0; |
441 | int zid; | |
33398cf2 | 442 | |
ef8f2327 | 443 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); |
b4536f0c MH |
444 | for (zid = 0; zid < MAX_NR_ZONES; zid++) |
445 | nr_pages += mz->lru_zone_size[zid][lru]; | |
446 | return nr_pages; | |
447 | } | |
448 | ||
449 | static inline | |
450 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
451 | enum lru_list lru, int zone_idx) | |
452 | { | |
453 | struct mem_cgroup_per_node *mz; | |
454 | ||
455 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
456 | return mz->lru_zone_size[zone_idx][lru]; | |
33398cf2 MH |
457 | } |
458 | ||
b23afb93 TH |
459 | void mem_cgroup_handle_over_high(void); |
460 | ||
7c5f64f8 VD |
461 | unsigned long mem_cgroup_get_limit(struct mem_cgroup *memcg); |
462 | ||
64219994 MH |
463 | void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, |
464 | struct task_struct *p); | |
58ae83db | 465 | |
49426420 | 466 | static inline void mem_cgroup_oom_enable(void) |
519e5247 | 467 | { |
626ebc41 TH |
468 | WARN_ON(current->memcg_may_oom); |
469 | current->memcg_may_oom = 1; | |
519e5247 JW |
470 | } |
471 | ||
49426420 | 472 | static inline void mem_cgroup_oom_disable(void) |
519e5247 | 473 | { |
626ebc41 TH |
474 | WARN_ON(!current->memcg_may_oom); |
475 | current->memcg_may_oom = 0; | |
519e5247 JW |
476 | } |
477 | ||
3812c8c8 JW |
478 | static inline bool task_in_memcg_oom(struct task_struct *p) |
479 | { | |
626ebc41 | 480 | return p->memcg_in_oom; |
3812c8c8 JW |
481 | } |
482 | ||
49426420 | 483 | bool mem_cgroup_oom_synchronize(bool wait); |
3812c8c8 | 484 | |
c255a458 | 485 | #ifdef CONFIG_MEMCG_SWAP |
c077719b KH |
486 | extern int do_swap_account; |
487 | #endif | |
f8d66542 | 488 | |
739f79fc JW |
489 | struct mem_cgroup *lock_page_memcg(struct page *page); |
490 | void __unlock_page_memcg(struct mem_cgroup *memcg); | |
62cccb8c | 491 | void unlock_page_memcg(struct page *page); |
d7365e78 | 492 | |
04fecbf5 | 493 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
ccda7f43 | 494 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, |
04fecbf5 | 495 | int idx) |
2a2e4885 | 496 | { |
a983b5eb JW |
497 | long x = atomic_long_read(&memcg->stat[idx]); |
498 | #ifdef CONFIG_SMP | |
499 | if (x < 0) | |
500 | x = 0; | |
501 | #endif | |
502 | return x; | |
2a2e4885 JW |
503 | } |
504 | ||
04fecbf5 | 505 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 506 | static inline void __mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 507 | int idx, int val) |
2a2e4885 | 508 | { |
a983b5eb JW |
509 | long x; |
510 | ||
511 | if (mem_cgroup_disabled()) | |
512 | return; | |
513 | ||
514 | x = val + __this_cpu_read(memcg->stat_cpu->count[idx]); | |
515 | if (unlikely(abs(x) > MEMCG_CHARGE_BATCH)) { | |
516 | atomic_long_add(x, &memcg->stat[idx]); | |
517 | x = 0; | |
518 | } | |
519 | __this_cpu_write(memcg->stat_cpu->count[idx], x); | |
2a2e4885 JW |
520 | } |
521 | ||
04fecbf5 | 522 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 523 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 524 | int idx, int val) |
2a2e4885 | 525 | { |
c3cc3911 JW |
526 | unsigned long flags; |
527 | ||
528 | local_irq_save(flags); | |
a983b5eb | 529 | __mod_memcg_state(memcg, idx, val); |
c3cc3911 | 530 | local_irq_restore(flags); |
2a2e4885 JW |
531 | } |
532 | ||
33398cf2 | 533 | /** |
ccda7f43 | 534 | * mod_memcg_page_state - update page state statistics |
62cccb8c | 535 | * @page: the page |
33398cf2 MH |
536 | * @idx: page state item to account |
537 | * @val: number of pages (positive or negative) | |
538 | * | |
fdf1cdb9 JW |
539 | * The @page must be locked or the caller must use lock_page_memcg() |
540 | * to prevent double accounting when the page is concurrently being | |
541 | * moved to another memcg: | |
81f8c3a4 | 542 | * |
fdf1cdb9 | 543 | * lock_page(page) or lock_page_memcg(page) |
81f8c3a4 | 544 | * if (TestClearPageState(page)) |
ccda7f43 | 545 | * mod_memcg_page_state(page, state, -1); |
fdf1cdb9 | 546 | * unlock_page(page) or unlock_page_memcg(page) |
2a2e4885 JW |
547 | * |
548 | * Kernel pages are an exception to this, since they'll never move. | |
33398cf2 | 549 | */ |
00f3ca2c | 550 | static inline void __mod_memcg_page_state(struct page *page, |
04fecbf5 | 551 | int idx, int val) |
00f3ca2c JW |
552 | { |
553 | if (page->mem_cgroup) | |
554 | __mod_memcg_state(page->mem_cgroup, idx, val); | |
555 | } | |
556 | ||
ccda7f43 | 557 | static inline void mod_memcg_page_state(struct page *page, |
04fecbf5 | 558 | int idx, int val) |
33398cf2 | 559 | { |
62cccb8c | 560 | if (page->mem_cgroup) |
ccda7f43 | 561 | mod_memcg_state(page->mem_cgroup, idx, val); |
33398cf2 MH |
562 | } |
563 | ||
00f3ca2c JW |
564 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
565 | enum node_stat_item idx) | |
2a7106f2 | 566 | { |
00f3ca2c | 567 | struct mem_cgroup_per_node *pn; |
a983b5eb | 568 | long x; |
00f3ca2c JW |
569 | |
570 | if (mem_cgroup_disabled()) | |
571 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
572 | ||
573 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
a983b5eb JW |
574 | x = atomic_long_read(&pn->lruvec_stat[idx]); |
575 | #ifdef CONFIG_SMP | |
576 | if (x < 0) | |
577 | x = 0; | |
578 | #endif | |
579 | return x; | |
2a7106f2 GT |
580 | } |
581 | ||
00f3ca2c JW |
582 | static inline void __mod_lruvec_state(struct lruvec *lruvec, |
583 | enum node_stat_item idx, int val) | |
2a7106f2 | 584 | { |
00f3ca2c | 585 | struct mem_cgroup_per_node *pn; |
a983b5eb | 586 | long x; |
00f3ca2c | 587 | |
28454265 | 588 | /* Update node */ |
00f3ca2c | 589 | __mod_node_page_state(lruvec_pgdat(lruvec), idx, val); |
28454265 | 590 | |
00f3ca2c JW |
591 | if (mem_cgroup_disabled()) |
592 | return; | |
28454265 | 593 | |
00f3ca2c | 594 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); |
28454265 JW |
595 | |
596 | /* Update memcg */ | |
00f3ca2c | 597 | __mod_memcg_state(pn->memcg, idx, val); |
28454265 JW |
598 | |
599 | /* Update lruvec */ | |
a983b5eb JW |
600 | x = val + __this_cpu_read(pn->lruvec_stat_cpu->count[idx]); |
601 | if (unlikely(abs(x) > MEMCG_CHARGE_BATCH)) { | |
602 | atomic_long_add(x, &pn->lruvec_stat[idx]); | |
603 | x = 0; | |
604 | } | |
605 | __this_cpu_write(pn->lruvec_stat_cpu->count[idx], x); | |
00f3ca2c JW |
606 | } |
607 | ||
608 | static inline void mod_lruvec_state(struct lruvec *lruvec, | |
609 | enum node_stat_item idx, int val) | |
610 | { | |
c3cc3911 JW |
611 | unsigned long flags; |
612 | ||
613 | local_irq_save(flags); | |
28454265 | 614 | __mod_lruvec_state(lruvec, idx, val); |
c3cc3911 | 615 | local_irq_restore(flags); |
00f3ca2c JW |
616 | } |
617 | ||
618 | static inline void __mod_lruvec_page_state(struct page *page, | |
619 | enum node_stat_item idx, int val) | |
620 | { | |
28454265 JW |
621 | pg_data_t *pgdat = page_pgdat(page); |
622 | struct lruvec *lruvec; | |
00f3ca2c | 623 | |
28454265 JW |
624 | /* Untracked pages have no memcg, no lruvec. Update only the node */ |
625 | if (!page->mem_cgroup) { | |
626 | __mod_node_page_state(pgdat, idx, val); | |
00f3ca2c | 627 | return; |
28454265 JW |
628 | } |
629 | ||
630 | lruvec = mem_cgroup_lruvec(pgdat, page->mem_cgroup); | |
631 | __mod_lruvec_state(lruvec, idx, val); | |
00f3ca2c JW |
632 | } |
633 | ||
634 | static inline void mod_lruvec_page_state(struct page *page, | |
635 | enum node_stat_item idx, int val) | |
636 | { | |
c3cc3911 JW |
637 | unsigned long flags; |
638 | ||
639 | local_irq_save(flags); | |
28454265 | 640 | __mod_lruvec_page_state(page, idx, val); |
c3cc3911 | 641 | local_irq_restore(flags); |
2a7106f2 GT |
642 | } |
643 | ||
ef8f2327 | 644 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
645 | gfp_t gfp_mask, |
646 | unsigned long *total_scanned); | |
a63d83f4 | 647 | |
c9019e9b JW |
648 | /* idx can be of type enum memcg_event_item or vm_event_item */ |
649 | static inline void __count_memcg_events(struct mem_cgroup *memcg, | |
650 | int idx, unsigned long count) | |
651 | { | |
a983b5eb JW |
652 | unsigned long x; |
653 | ||
654 | if (mem_cgroup_disabled()) | |
655 | return; | |
656 | ||
657 | x = count + __this_cpu_read(memcg->stat_cpu->events[idx]); | |
658 | if (unlikely(x > MEMCG_CHARGE_BATCH)) { | |
659 | atomic_long_add(x, &memcg->events[idx]); | |
660 | x = 0; | |
661 | } | |
662 | __this_cpu_write(memcg->stat_cpu->events[idx], x); | |
c9019e9b JW |
663 | } |
664 | ||
2262185c | 665 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
c9019e9b | 666 | int idx, unsigned long count) |
2262185c | 667 | { |
c3cc3911 JW |
668 | unsigned long flags; |
669 | ||
670 | local_irq_save(flags); | |
a983b5eb | 671 | __count_memcg_events(memcg, idx, count); |
c3cc3911 | 672 | local_irq_restore(flags); |
2262185c RG |
673 | } |
674 | ||
c9019e9b | 675 | /* idx can be of type enum memcg_event_item or vm_event_item */ |
2262185c | 676 | static inline void count_memcg_page_event(struct page *page, |
04fecbf5 | 677 | int idx) |
2262185c RG |
678 | { |
679 | if (page->mem_cgroup) | |
680 | count_memcg_events(page->mem_cgroup, idx, 1); | |
681 | } | |
682 | ||
683 | static inline void count_memcg_event_mm(struct mm_struct *mm, | |
684 | enum vm_event_item idx) | |
68ae564b | 685 | { |
33398cf2 MH |
686 | struct mem_cgroup *memcg; |
687 | ||
68ae564b DR |
688 | if (mem_cgroup_disabled()) |
689 | return; | |
33398cf2 MH |
690 | |
691 | rcu_read_lock(); | |
692 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
8e675f7a | 693 | if (likely(memcg)) { |
c9019e9b | 694 | count_memcg_events(memcg, idx, 1); |
8e675f7a KK |
695 | if (idx == OOM_KILL) |
696 | cgroup_file_notify(&memcg->events_file); | |
697 | } | |
33398cf2 | 698 | rcu_read_unlock(); |
68ae564b | 699 | } |
c9019e9b JW |
700 | |
701 | static inline void mem_cgroup_event(struct mem_cgroup *memcg, | |
702 | enum memcg_event_item event) | |
703 | { | |
704 | count_memcg_events(memcg, event, 1); | |
705 | cgroup_file_notify(&memcg->events_file); | |
706 | } | |
707 | ||
ca3e0214 | 708 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
e94c8a9c | 709 | void mem_cgroup_split_huge_fixup(struct page *head); |
ca3e0214 KH |
710 | #endif |
711 | ||
c255a458 | 712 | #else /* CONFIG_MEMCG */ |
23047a96 JW |
713 | |
714 | #define MEM_CGROUP_ID_SHIFT 0 | |
715 | #define MEM_CGROUP_ID_MAX 0 | |
716 | ||
7a81b88c KH |
717 | struct mem_cgroup; |
718 | ||
23047a96 JW |
719 | static inline bool mem_cgroup_disabled(void) |
720 | { | |
721 | return true; | |
722 | } | |
723 | ||
31176c78 | 724 | static inline void mem_cgroup_event(struct mem_cgroup *memcg, |
df0e53d0 | 725 | enum memcg_event_item event) |
241994ed JW |
726 | { |
727 | } | |
728 | ||
729 | static inline bool mem_cgroup_low(struct mem_cgroup *root, | |
730 | struct mem_cgroup *memcg) | |
731 | { | |
732 | return false; | |
733 | } | |
734 | ||
00501b53 JW |
735 | static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
736 | gfp_t gfp_mask, | |
f627c2f5 KS |
737 | struct mem_cgroup **memcgp, |
738 | bool compound) | |
7a81b88c | 739 | { |
00501b53 | 740 | *memcgp = NULL; |
7a81b88c KH |
741 | return 0; |
742 | } | |
743 | ||
00501b53 JW |
744 | static inline void mem_cgroup_commit_charge(struct page *page, |
745 | struct mem_cgroup *memcg, | |
f627c2f5 | 746 | bool lrucare, bool compound) |
7a81b88c KH |
747 | { |
748 | } | |
749 | ||
00501b53 | 750 | static inline void mem_cgroup_cancel_charge(struct page *page, |
f627c2f5 KS |
751 | struct mem_cgroup *memcg, |
752 | bool compound) | |
7a81b88c KH |
753 | { |
754 | } | |
755 | ||
0a31bc97 | 756 | static inline void mem_cgroup_uncharge(struct page *page) |
569b846d KH |
757 | { |
758 | } | |
759 | ||
747db954 | 760 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
8a9f3ccd BS |
761 | { |
762 | } | |
763 | ||
6a93ca8f | 764 | static inline void mem_cgroup_migrate(struct page *old, struct page *new) |
69029cd5 KH |
765 | { |
766 | } | |
767 | ||
a9dd0a83 | 768 | static inline struct lruvec *mem_cgroup_lruvec(struct pglist_data *pgdat, |
ef8f2327 | 769 | struct mem_cgroup *memcg) |
08e552c6 | 770 | { |
a9dd0a83 | 771 | return node_lruvec(pgdat); |
08e552c6 KH |
772 | } |
773 | ||
fa9add64 | 774 | static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, |
599d0c95 | 775 | struct pglist_data *pgdat) |
66e1707b | 776 | { |
599d0c95 | 777 | return &pgdat->lruvec; |
66e1707b BS |
778 | } |
779 | ||
587af308 | 780 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
c0ff4b85 | 781 | struct mem_cgroup *memcg) |
bed7161a | 782 | { |
587af308 | 783 | return true; |
bed7161a BS |
784 | } |
785 | ||
ffbdccf5 DR |
786 | static inline bool task_in_mem_cgroup(struct task_struct *task, |
787 | const struct mem_cgroup *memcg) | |
4c4a2214 | 788 | { |
ffbdccf5 | 789 | return true; |
4c4a2214 DR |
790 | } |
791 | ||
5660048c JW |
792 | static inline struct mem_cgroup * |
793 | mem_cgroup_iter(struct mem_cgroup *root, | |
794 | struct mem_cgroup *prev, | |
795 | struct mem_cgroup_reclaim_cookie *reclaim) | |
796 | { | |
797 | return NULL; | |
798 | } | |
799 | ||
800 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
801 | struct mem_cgroup *prev) | |
802 | { | |
803 | } | |
804 | ||
7c5f64f8 VD |
805 | static inline int mem_cgroup_scan_tasks(struct mem_cgroup *memcg, |
806 | int (*fn)(struct task_struct *, void *), void *arg) | |
807 | { | |
808 | return 0; | |
809 | } | |
810 | ||
23047a96 | 811 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
f8d66542 | 812 | { |
23047a96 JW |
813 | return 0; |
814 | } | |
815 | ||
816 | static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id) | |
817 | { | |
818 | WARN_ON_ONCE(id); | |
819 | /* XXX: This should always return root_mem_cgroup */ | |
820 | return NULL; | |
f8d66542 | 821 | } |
a636b327 | 822 | |
2262185c RG |
823 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
824 | { | |
825 | return NULL; | |
826 | } | |
827 | ||
eb01aaab | 828 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
14797e23 | 829 | { |
13308ca9 | 830 | return true; |
14797e23 KM |
831 | } |
832 | ||
a3d8e054 | 833 | static inline unsigned long |
4d7dcca2 | 834 | mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru) |
a3d8e054 KM |
835 | { |
836 | return 0; | |
837 | } | |
b4536f0c MH |
838 | static inline |
839 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
840 | enum lru_list lru, int zone_idx) | |
841 | { | |
842 | return 0; | |
843 | } | |
a3d8e054 | 844 | |
0a6b76dd VD |
845 | static inline unsigned long |
846 | mem_cgroup_node_nr_lru_pages(struct mem_cgroup *memcg, | |
847 | int nid, unsigned int lru_mask) | |
848 | { | |
849 | return 0; | |
850 | } | |
851 | ||
7c5f64f8 VD |
852 | static inline unsigned long mem_cgroup_get_limit(struct mem_cgroup *memcg) |
853 | { | |
854 | return 0; | |
855 | } | |
856 | ||
e222432b BS |
857 | static inline void |
858 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) | |
859 | { | |
860 | } | |
861 | ||
739f79fc JW |
862 | static inline struct mem_cgroup *lock_page_memcg(struct page *page) |
863 | { | |
864 | return NULL; | |
865 | } | |
866 | ||
867 | static inline void __unlock_page_memcg(struct mem_cgroup *memcg) | |
89c06bd5 KH |
868 | { |
869 | } | |
870 | ||
62cccb8c | 871 | static inline void unlock_page_memcg(struct page *page) |
89c06bd5 KH |
872 | { |
873 | } | |
874 | ||
b23afb93 TH |
875 | static inline void mem_cgroup_handle_over_high(void) |
876 | { | |
877 | } | |
878 | ||
49426420 | 879 | static inline void mem_cgroup_oom_enable(void) |
519e5247 JW |
880 | { |
881 | } | |
882 | ||
49426420 | 883 | static inline void mem_cgroup_oom_disable(void) |
519e5247 JW |
884 | { |
885 | } | |
886 | ||
3812c8c8 JW |
887 | static inline bool task_in_memcg_oom(struct task_struct *p) |
888 | { | |
889 | return false; | |
890 | } | |
891 | ||
49426420 | 892 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
3812c8c8 JW |
893 | { |
894 | return false; | |
895 | } | |
896 | ||
ccda7f43 | 897 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, |
04fecbf5 | 898 | int idx) |
2a2e4885 JW |
899 | { |
900 | return 0; | |
901 | } | |
902 | ||
00f3ca2c | 903 | static inline void __mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 904 | int idx, |
00f3ca2c | 905 | int nr) |
2a2e4885 JW |
906 | { |
907 | } | |
908 | ||
00f3ca2c | 909 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 910 | int idx, |
00f3ca2c | 911 | int nr) |
2a2e4885 JW |
912 | { |
913 | } | |
914 | ||
00f3ca2c | 915 | static inline void __mod_memcg_page_state(struct page *page, |
04fecbf5 | 916 | int idx, |
00f3ca2c | 917 | int nr) |
2a2e4885 JW |
918 | { |
919 | } | |
920 | ||
ccda7f43 | 921 | static inline void mod_memcg_page_state(struct page *page, |
04fecbf5 | 922 | int idx, |
ccda7f43 | 923 | int nr) |
553af430 JW |
924 | { |
925 | } | |
926 | ||
00f3ca2c JW |
927 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
928 | enum node_stat_item idx) | |
2a7106f2 | 929 | { |
00f3ca2c | 930 | return node_page_state(lruvec_pgdat(lruvec), idx); |
2a7106f2 GT |
931 | } |
932 | ||
00f3ca2c JW |
933 | static inline void __mod_lruvec_state(struct lruvec *lruvec, |
934 | enum node_stat_item idx, int val) | |
d69b042f | 935 | { |
00f3ca2c JW |
936 | __mod_node_page_state(lruvec_pgdat(lruvec), idx, val); |
937 | } | |
938 | ||
939 | static inline void mod_lruvec_state(struct lruvec *lruvec, | |
940 | enum node_stat_item idx, int val) | |
941 | { | |
942 | mod_node_page_state(lruvec_pgdat(lruvec), idx, val); | |
943 | } | |
944 | ||
945 | static inline void __mod_lruvec_page_state(struct page *page, | |
946 | enum node_stat_item idx, int val) | |
947 | { | |
948 | __mod_node_page_state(page_pgdat(page), idx, val); | |
949 | } | |
950 | ||
951 | static inline void mod_lruvec_page_state(struct page *page, | |
952 | enum node_stat_item idx, int val) | |
953 | { | |
954 | mod_node_page_state(page_pgdat(page), idx, val); | |
d69b042f BS |
955 | } |
956 | ||
4e416953 | 957 | static inline |
ef8f2327 | 958 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
959 | gfp_t gfp_mask, |
960 | unsigned long *total_scanned) | |
4e416953 | 961 | { |
0608f43d | 962 | return 0; |
4e416953 BS |
963 | } |
964 | ||
e94c8a9c | 965 | static inline void mem_cgroup_split_huge_fixup(struct page *head) |
ca3e0214 KH |
966 | { |
967 | } | |
968 | ||
2262185c RG |
969 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
970 | enum vm_event_item idx, | |
971 | unsigned long count) | |
972 | { | |
973 | } | |
974 | ||
975 | static inline void count_memcg_page_event(struct page *page, | |
04fecbf5 | 976 | int idx) |
2262185c RG |
977 | { |
978 | } | |
979 | ||
456f998e | 980 | static inline |
2262185c | 981 | void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx) |
456f998e YH |
982 | { |
983 | } | |
c255a458 | 984 | #endif /* CONFIG_MEMCG */ |
78fb7466 | 985 | |
04fecbf5 | 986 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 987 | static inline void __inc_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 988 | int idx) |
00f3ca2c JW |
989 | { |
990 | __mod_memcg_state(memcg, idx, 1); | |
991 | } | |
992 | ||
04fecbf5 | 993 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 994 | static inline void __dec_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 995 | int idx) |
00f3ca2c JW |
996 | { |
997 | __mod_memcg_state(memcg, idx, -1); | |
998 | } | |
999 | ||
04fecbf5 | 1000 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1001 | static inline void __inc_memcg_page_state(struct page *page, |
04fecbf5 | 1002 | int idx) |
00f3ca2c JW |
1003 | { |
1004 | __mod_memcg_page_state(page, idx, 1); | |
1005 | } | |
1006 | ||
04fecbf5 | 1007 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1008 | static inline void __dec_memcg_page_state(struct page *page, |
04fecbf5 | 1009 | int idx) |
00f3ca2c JW |
1010 | { |
1011 | __mod_memcg_page_state(page, idx, -1); | |
1012 | } | |
1013 | ||
1014 | static inline void __inc_lruvec_state(struct lruvec *lruvec, | |
1015 | enum node_stat_item idx) | |
1016 | { | |
1017 | __mod_lruvec_state(lruvec, idx, 1); | |
1018 | } | |
1019 | ||
1020 | static inline void __dec_lruvec_state(struct lruvec *lruvec, | |
1021 | enum node_stat_item idx) | |
1022 | { | |
1023 | __mod_lruvec_state(lruvec, idx, -1); | |
1024 | } | |
1025 | ||
1026 | static inline void __inc_lruvec_page_state(struct page *page, | |
1027 | enum node_stat_item idx) | |
1028 | { | |
1029 | __mod_lruvec_page_state(page, idx, 1); | |
1030 | } | |
1031 | ||
1032 | static inline void __dec_lruvec_page_state(struct page *page, | |
1033 | enum node_stat_item idx) | |
1034 | { | |
1035 | __mod_lruvec_page_state(page, idx, -1); | |
1036 | } | |
1037 | ||
04fecbf5 | 1038 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1039 | static inline void inc_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1040 | int idx) |
00f3ca2c JW |
1041 | { |
1042 | mod_memcg_state(memcg, idx, 1); | |
1043 | } | |
1044 | ||
04fecbf5 | 1045 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1046 | static inline void dec_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1047 | int idx) |
00f3ca2c JW |
1048 | { |
1049 | mod_memcg_state(memcg, idx, -1); | |
1050 | } | |
1051 | ||
04fecbf5 | 1052 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1053 | static inline void inc_memcg_page_state(struct page *page, |
04fecbf5 | 1054 | int idx) |
00f3ca2c JW |
1055 | { |
1056 | mod_memcg_page_state(page, idx, 1); | |
1057 | } | |
1058 | ||
04fecbf5 | 1059 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1060 | static inline void dec_memcg_page_state(struct page *page, |
04fecbf5 | 1061 | int idx) |
00f3ca2c JW |
1062 | { |
1063 | mod_memcg_page_state(page, idx, -1); | |
1064 | } | |
1065 | ||
1066 | static inline void inc_lruvec_state(struct lruvec *lruvec, | |
1067 | enum node_stat_item idx) | |
1068 | { | |
1069 | mod_lruvec_state(lruvec, idx, 1); | |
1070 | } | |
1071 | ||
1072 | static inline void dec_lruvec_state(struct lruvec *lruvec, | |
1073 | enum node_stat_item idx) | |
1074 | { | |
1075 | mod_lruvec_state(lruvec, idx, -1); | |
1076 | } | |
1077 | ||
1078 | static inline void inc_lruvec_page_state(struct page *page, | |
1079 | enum node_stat_item idx) | |
1080 | { | |
1081 | mod_lruvec_page_state(page, idx, 1); | |
1082 | } | |
1083 | ||
1084 | static inline void dec_lruvec_page_state(struct page *page, | |
1085 | enum node_stat_item idx) | |
1086 | { | |
1087 | mod_lruvec_page_state(page, idx, -1); | |
1088 | } | |
1089 | ||
52ebea74 | 1090 | #ifdef CONFIG_CGROUP_WRITEBACK |
841710aa | 1091 | |
52ebea74 | 1092 | struct list_head *mem_cgroup_cgwb_list(struct mem_cgroup *memcg); |
841710aa | 1093 | struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb); |
c5edf9cd TH |
1094 | void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages, |
1095 | unsigned long *pheadroom, unsigned long *pdirty, | |
1096 | unsigned long *pwriteback); | |
841710aa TH |
1097 | |
1098 | #else /* CONFIG_CGROUP_WRITEBACK */ | |
1099 | ||
1100 | static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb) | |
1101 | { | |
1102 | return NULL; | |
1103 | } | |
1104 | ||
c2aa723a | 1105 | static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb, |
c5edf9cd TH |
1106 | unsigned long *pfilepages, |
1107 | unsigned long *pheadroom, | |
c2aa723a TH |
1108 | unsigned long *pdirty, |
1109 | unsigned long *pwriteback) | |
1110 | { | |
1111 | } | |
1112 | ||
841710aa | 1113 | #endif /* CONFIG_CGROUP_WRITEBACK */ |
52ebea74 | 1114 | |
e1aab161 | 1115 | struct sock; |
baac50bb JW |
1116 | bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); |
1117 | void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); | |
d886f4e4 | 1118 | #ifdef CONFIG_MEMCG |
ef12947c JW |
1119 | extern struct static_key_false memcg_sockets_enabled_key; |
1120 | #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key) | |
2d758073 JW |
1121 | void mem_cgroup_sk_alloc(struct sock *sk); |
1122 | void mem_cgroup_sk_free(struct sock *sk); | |
baac50bb | 1123 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c | 1124 | { |
0db15298 | 1125 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && memcg->tcpmem_pressure) |
8e8ae645 | 1126 | return true; |
8e8ae645 JW |
1127 | do { |
1128 | if (time_before(jiffies, memcg->socket_pressure)) | |
1129 | return true; | |
1130 | } while ((memcg = parent_mem_cgroup(memcg))); | |
1131 | return false; | |
e805605c JW |
1132 | } |
1133 | #else | |
80e95fe0 | 1134 | #define mem_cgroup_sockets_enabled 0 |
2d758073 JW |
1135 | static inline void mem_cgroup_sk_alloc(struct sock *sk) { }; |
1136 | static inline void mem_cgroup_sk_free(struct sock *sk) { }; | |
baac50bb | 1137 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c JW |
1138 | { |
1139 | return false; | |
1140 | } | |
1141 | #endif | |
7ae1e1d0 | 1142 | |
45264778 VD |
1143 | struct kmem_cache *memcg_kmem_get_cache(struct kmem_cache *cachep); |
1144 | void memcg_kmem_put_cache(struct kmem_cache *cachep); | |
1145 | int memcg_kmem_charge_memcg(struct page *page, gfp_t gfp, int order, | |
1146 | struct mem_cgroup *memcg); | |
1147 | int memcg_kmem_charge(struct page *page, gfp_t gfp, int order); | |
1148 | void memcg_kmem_uncharge(struct page *page, int order); | |
1149 | ||
127424c8 | 1150 | #if defined(CONFIG_MEMCG) && !defined(CONFIG_SLOB) |
ef12947c | 1151 | extern struct static_key_false memcg_kmem_enabled_key; |
17cc4dfe | 1152 | extern struct workqueue_struct *memcg_kmem_cache_wq; |
749c5415 | 1153 | |
dbcf73e2 | 1154 | extern int memcg_nr_cache_ids; |
64219994 MH |
1155 | void memcg_get_cache_ids(void); |
1156 | void memcg_put_cache_ids(void); | |
ebe945c2 GC |
1157 | |
1158 | /* | |
1159 | * Helper macro to loop through all memcg-specific caches. Callers must still | |
1160 | * check if the cache is valid (it is either valid or NULL). | |
1161 | * the slab_mutex must be held when looping through those caches | |
1162 | */ | |
749c5415 | 1163 | #define for_each_memcg_cache_index(_idx) \ |
dbcf73e2 | 1164 | for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++) |
749c5415 | 1165 | |
7ae1e1d0 GC |
1166 | static inline bool memcg_kmem_enabled(void) |
1167 | { | |
ef12947c | 1168 | return static_branch_unlikely(&memcg_kmem_enabled_key); |
7ae1e1d0 GC |
1169 | } |
1170 | ||
33398cf2 | 1171 | /* |
9f706d68 | 1172 | * helper for accessing a memcg's index. It will be used as an index in the |
33398cf2 MH |
1173 | * child cache array in kmem_cache, and also to derive its name. This function |
1174 | * will return -1 when this is not a kmem-limited memcg. | |
1175 | */ | |
1176 | static inline int memcg_cache_id(struct mem_cgroup *memcg) | |
1177 | { | |
1178 | return memcg ? memcg->kmemcg_id : -1; | |
1179 | } | |
5722d094 | 1180 | |
7ae1e1d0 | 1181 | #else |
749c5415 GC |
1182 | #define for_each_memcg_cache_index(_idx) \ |
1183 | for (; NULL; ) | |
1184 | ||
b9ce5ef4 GC |
1185 | static inline bool memcg_kmem_enabled(void) |
1186 | { | |
1187 | return false; | |
1188 | } | |
1189 | ||
2633d7a0 GC |
1190 | static inline int memcg_cache_id(struct mem_cgroup *memcg) |
1191 | { | |
1192 | return -1; | |
1193 | } | |
1194 | ||
05257a1a VD |
1195 | static inline void memcg_get_cache_ids(void) |
1196 | { | |
1197 | } | |
1198 | ||
1199 | static inline void memcg_put_cache_ids(void) | |
1200 | { | |
1201 | } | |
1202 | ||
127424c8 JW |
1203 | #endif /* CONFIG_MEMCG && !CONFIG_SLOB */ |
1204 | ||
8cdea7c0 | 1205 | #endif /* _LINUX_MEMCONTROL_H */ |