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