Commit | Line | Data |
---|---|---|
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 | ||
e27be240 JW |
51 | enum memcg_memory_event { |
52 | MEMCG_LOW, | |
71cd3113 JW |
53 | MEMCG_HIGH, |
54 | MEMCG_MAX, | |
55 | MEMCG_OOM, | |
e27be240 | 56 | MEMCG_NR_MEMORY_EVENTS, |
71cd3113 JW |
57 | }; |
58 | ||
5660048c | 59 | struct mem_cgroup_reclaim_cookie { |
ef8f2327 | 60 | pg_data_t *pgdat; |
5660048c JW |
61 | int priority; |
62 | unsigned int generation; | |
63 | }; | |
64 | ||
71cd3113 JW |
65 | #ifdef CONFIG_MEMCG |
66 | ||
67 | #define MEM_CGROUP_ID_SHIFT 16 | |
68 | #define MEM_CGROUP_ID_MAX USHRT_MAX | |
69 | ||
70 | struct mem_cgroup_id { | |
71 | int id; | |
72 | atomic_t ref; | |
73 | }; | |
74 | ||
33398cf2 MH |
75 | /* |
76 | * Per memcg event counter is incremented at every pagein/pageout. With THP, | |
77 | * it will be incremated by the number of pages. This counter is used for | |
78 | * for trigger some periodic events. This is straightforward and better | |
79 | * than using jiffies etc. to handle periodic memcg event. | |
80 | */ | |
81 | enum mem_cgroup_events_target { | |
82 | MEM_CGROUP_TARGET_THRESH, | |
83 | MEM_CGROUP_TARGET_SOFTLIMIT, | |
84 | MEM_CGROUP_TARGET_NUMAINFO, | |
85 | MEM_CGROUP_NTARGETS, | |
86 | }; | |
87 | ||
33398cf2 | 88 | struct mem_cgroup_stat_cpu { |
b2807f07 | 89 | long count[MEMCG_NR_STAT]; |
e27be240 | 90 | unsigned long events[NR_VM_EVENT_ITEMS]; |
33398cf2 MH |
91 | unsigned long nr_page_events; |
92 | unsigned long targets[MEM_CGROUP_NTARGETS]; | |
93 | }; | |
94 | ||
95 | struct mem_cgroup_reclaim_iter { | |
96 | struct mem_cgroup *position; | |
97 | /* scan generation, increased every round-trip */ | |
98 | unsigned int generation; | |
99 | }; | |
100 | ||
00f3ca2c JW |
101 | struct lruvec_stat { |
102 | long count[NR_VM_NODE_STAT_ITEMS]; | |
103 | }; | |
104 | ||
33398cf2 MH |
105 | /* |
106 | * per-zone information in memory controller. | |
107 | */ | |
ef8f2327 | 108 | struct mem_cgroup_per_node { |
33398cf2 | 109 | struct lruvec lruvec; |
a983b5eb JW |
110 | |
111 | struct lruvec_stat __percpu *lruvec_stat_cpu; | |
112 | atomic_long_t lruvec_stat[NR_VM_NODE_STAT_ITEMS]; | |
113 | ||
b4536f0c | 114 | unsigned long lru_zone_size[MAX_NR_ZONES][NR_LRU_LISTS]; |
33398cf2 MH |
115 | |
116 | struct mem_cgroup_reclaim_iter iter[DEF_PRIORITY + 1]; | |
117 | ||
118 | struct rb_node tree_node; /* RB tree node */ | |
119 | unsigned long usage_in_excess;/* Set to the value by which */ | |
120 | /* the soft limit is exceeded*/ | |
121 | bool on_tree; | |
e3c1ac58 AR |
122 | bool congested; /* memcg has many dirty pages */ |
123 | /* backed by a congested BDI */ | |
124 | ||
33398cf2 MH |
125 | struct mem_cgroup *memcg; /* Back pointer, we cannot */ |
126 | /* use container_of */ | |
127 | }; | |
128 | ||
33398cf2 MH |
129 | struct mem_cgroup_threshold { |
130 | struct eventfd_ctx *eventfd; | |
131 | unsigned long threshold; | |
132 | }; | |
133 | ||
134 | /* For threshold */ | |
135 | struct mem_cgroup_threshold_ary { | |
136 | /* An array index points to threshold just below or equal to usage. */ | |
137 | int current_threshold; | |
138 | /* Size of entries[] */ | |
139 | unsigned int size; | |
140 | /* Array of thresholds */ | |
141 | struct mem_cgroup_threshold entries[0]; | |
142 | }; | |
143 | ||
144 | struct mem_cgroup_thresholds { | |
145 | /* Primary thresholds array */ | |
146 | struct mem_cgroup_threshold_ary *primary; | |
147 | /* | |
148 | * Spare threshold array. | |
149 | * This is needed to make mem_cgroup_unregister_event() "never fail". | |
150 | * It must be able to store at least primary->size - 1 entries. | |
151 | */ | |
152 | struct mem_cgroup_threshold_ary *spare; | |
153 | }; | |
154 | ||
567e9ab2 JW |
155 | enum memcg_kmem_state { |
156 | KMEM_NONE, | |
157 | KMEM_ALLOCATED, | |
158 | KMEM_ONLINE, | |
159 | }; | |
160 | ||
33398cf2 MH |
161 | /* |
162 | * The memory controller data structure. The memory controller controls both | |
163 | * page cache and RSS per cgroup. We would eventually like to provide | |
164 | * statistics based on the statistics developed by Rik Van Riel for clock-pro, | |
165 | * to help the administrator determine what knobs to tune. | |
166 | */ | |
167 | struct mem_cgroup { | |
168 | struct cgroup_subsys_state css; | |
169 | ||
73f576c0 JW |
170 | /* Private memcg ID. Used to ID objects that outlive the cgroup */ |
171 | struct mem_cgroup_id id; | |
172 | ||
33398cf2 MH |
173 | /* Accounted resources */ |
174 | struct page_counter memory; | |
37e84351 | 175 | struct page_counter swap; |
0db15298 JW |
176 | |
177 | /* Legacy consumer-oriented counters */ | |
33398cf2 MH |
178 | struct page_counter memsw; |
179 | struct page_counter kmem; | |
0db15298 | 180 | struct page_counter tcpmem; |
33398cf2 MH |
181 | |
182 | /* Normal memory consumption range */ | |
183 | unsigned long low; | |
184 | unsigned long high; | |
185 | ||
f7e1cb6e JW |
186 | /* Range enforcement for interrupt charges */ |
187 | struct work_struct high_work; | |
188 | ||
33398cf2 MH |
189 | unsigned long soft_limit; |
190 | ||
191 | /* vmpressure notifications */ | |
192 | struct vmpressure vmpressure; | |
193 | ||
33398cf2 MH |
194 | /* |
195 | * Should the accounting and control be hierarchical, per subtree? | |
196 | */ | |
197 | bool use_hierarchy; | |
198 | ||
199 | /* protected by memcg_oom_lock */ | |
200 | bool oom_lock; | |
201 | int under_oom; | |
202 | ||
203 | int swappiness; | |
204 | /* OOM-Killer disable */ | |
205 | int oom_kill_disable; | |
206 | ||
e27be240 JW |
207 | /* memory.events */ |
208 | atomic_long_t memory_events[MEMCG_NR_MEMORY_EVENTS]; | |
472912a2 TH |
209 | struct cgroup_file events_file; |
210 | ||
33398cf2 MH |
211 | /* protect arrays of thresholds */ |
212 | struct mutex thresholds_lock; | |
213 | ||
214 | /* thresholds for memory usage. RCU-protected */ | |
215 | struct mem_cgroup_thresholds thresholds; | |
216 | ||
217 | /* thresholds for mem+swap usage. RCU-protected */ | |
218 | struct mem_cgroup_thresholds memsw_thresholds; | |
219 | ||
220 | /* For oom notifier event fd */ | |
221 | struct list_head oom_notify; | |
222 | ||
223 | /* | |
224 | * Should we move charges of a task when a task is moved into this | |
225 | * mem_cgroup ? And what type of charges should we move ? | |
226 | */ | |
227 | unsigned long move_charge_at_immigrate; | |
228 | /* | |
229 | * set > 0 if pages under this cgroup are moving to other cgroup. | |
230 | */ | |
231 | atomic_t moving_account; | |
232 | /* taken only while moving_account > 0 */ | |
233 | spinlock_t move_lock; | |
234 | struct task_struct *move_lock_task; | |
235 | unsigned long move_lock_flags; | |
a983b5eb | 236 | |
e27be240 | 237 | /* memory.stat */ |
a983b5eb JW |
238 | struct mem_cgroup_stat_cpu __percpu *stat_cpu; |
239 | atomic_long_t stat[MEMCG_NR_STAT]; | |
e27be240 | 240 | atomic_long_t events[NR_VM_EVENT_ITEMS]; |
33398cf2 | 241 | |
d886f4e4 JW |
242 | unsigned long socket_pressure; |
243 | ||
244 | /* Legacy tcp memory accounting */ | |
0db15298 JW |
245 | bool tcpmem_active; |
246 | int tcpmem_pressure; | |
d886f4e4 | 247 | |
127424c8 | 248 | #ifndef CONFIG_SLOB |
33398cf2 MH |
249 | /* Index in the kmem_cache->memcg_params.memcg_caches array */ |
250 | int kmemcg_id; | |
567e9ab2 | 251 | enum memcg_kmem_state kmem_state; |
bc2791f8 | 252 | struct list_head kmem_caches; |
33398cf2 MH |
253 | #endif |
254 | ||
255 | int last_scanned_node; | |
256 | #if MAX_NUMNODES > 1 | |
257 | nodemask_t scan_nodes; | |
258 | atomic_t numainfo_events; | |
259 | atomic_t numainfo_updating; | |
260 | #endif | |
261 | ||
262 | #ifdef CONFIG_CGROUP_WRITEBACK | |
263 | struct list_head cgwb_list; | |
264 | struct wb_domain cgwb_domain; | |
265 | #endif | |
266 | ||
267 | /* List of events which userspace want to receive */ | |
268 | struct list_head event_list; | |
269 | spinlock_t event_list_lock; | |
270 | ||
271 | struct mem_cgroup_per_node *nodeinfo[0]; | |
272 | /* WARNING: nodeinfo must be the last member here */ | |
273 | }; | |
7d828602 | 274 | |
a983b5eb JW |
275 | /* |
276 | * size of first charge trial. "32" comes from vmscan.c's magic value. | |
277 | * TODO: maybe necessary to use big numbers in big irons. | |
278 | */ | |
279 | #define MEMCG_CHARGE_BATCH 32U | |
280 | ||
7d828602 | 281 | extern struct mem_cgroup *root_mem_cgroup; |
56161634 | 282 | |
23047a96 JW |
283 | static inline bool mem_cgroup_disabled(void) |
284 | { | |
285 | return !cgroup_subsys_enabled(memory_cgrp_subsys); | |
286 | } | |
287 | ||
241994ed JW |
288 | bool mem_cgroup_low(struct mem_cgroup *root, struct mem_cgroup *memcg); |
289 | ||
00501b53 | 290 | int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
f627c2f5 KS |
291 | gfp_t gfp_mask, struct mem_cgroup **memcgp, |
292 | bool compound); | |
00501b53 | 293 | void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg, |
f627c2f5 KS |
294 | bool lrucare, bool compound); |
295 | void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg, | |
296 | bool compound); | |
0a31bc97 | 297 | void mem_cgroup_uncharge(struct page *page); |
747db954 | 298 | void mem_cgroup_uncharge_list(struct list_head *page_list); |
569b846d | 299 | |
6a93ca8f | 300 | void mem_cgroup_migrate(struct page *oldpage, struct page *newpage); |
569b846d | 301 | |
ef8f2327 MG |
302 | static struct mem_cgroup_per_node * |
303 | mem_cgroup_nodeinfo(struct mem_cgroup *memcg, int nid) | |
55779ec7 | 304 | { |
ef8f2327 | 305 | return memcg->nodeinfo[nid]; |
55779ec7 JW |
306 | } |
307 | ||
308 | /** | |
a9dd0a83 MG |
309 | * mem_cgroup_lruvec - get the lru list vector for a node or a memcg zone |
310 | * @node: node of the wanted lruvec | |
55779ec7 JW |
311 | * @memcg: memcg of the wanted lruvec |
312 | * | |
a9dd0a83 MG |
313 | * Returns the lru list vector holding pages for a given @node or a given |
314 | * @memcg and @zone. This can be the node lruvec, if the memory controller | |
55779ec7 JW |
315 | * is disabled. |
316 | */ | |
a9dd0a83 | 317 | static inline struct lruvec *mem_cgroup_lruvec(struct pglist_data *pgdat, |
ef8f2327 | 318 | struct mem_cgroup *memcg) |
55779ec7 | 319 | { |
ef8f2327 | 320 | struct mem_cgroup_per_node *mz; |
55779ec7 JW |
321 | struct lruvec *lruvec; |
322 | ||
323 | if (mem_cgroup_disabled()) { | |
a9dd0a83 | 324 | lruvec = node_lruvec(pgdat); |
55779ec7 JW |
325 | goto out; |
326 | } | |
327 | ||
ef8f2327 | 328 | mz = mem_cgroup_nodeinfo(memcg, pgdat->node_id); |
55779ec7 JW |
329 | lruvec = &mz->lruvec; |
330 | out: | |
331 | /* | |
332 | * Since a node can be onlined after the mem_cgroup was created, | |
599d0c95 | 333 | * we have to be prepared to initialize lruvec->pgdat here; |
55779ec7 JW |
334 | * and if offlined then reonlined, we need to reinitialize it. |
335 | */ | |
ef8f2327 MG |
336 | if (unlikely(lruvec->pgdat != pgdat)) |
337 | lruvec->pgdat = pgdat; | |
55779ec7 JW |
338 | return lruvec; |
339 | } | |
340 | ||
599d0c95 | 341 | struct lruvec *mem_cgroup_page_lruvec(struct page *, struct pglist_data *); |
c9b0ed51 | 342 | |
2314b42d | 343 | bool task_in_mem_cgroup(struct task_struct *task, struct mem_cgroup *memcg); |
64219994 | 344 | struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
e993d905 | 345 | |
33398cf2 MH |
346 | static inline |
347 | struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){ | |
348 | return css ? container_of(css, struct mem_cgroup, css) : NULL; | |
349 | } | |
350 | ||
8e8ae645 JW |
351 | #define mem_cgroup_from_counter(counter, member) \ |
352 | container_of(counter, struct mem_cgroup, member) | |
353 | ||
33398cf2 MH |
354 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
355 | struct mem_cgroup *, | |
356 | struct mem_cgroup_reclaim_cookie *); | |
357 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); | |
7c5f64f8 VD |
358 | int mem_cgroup_scan_tasks(struct mem_cgroup *, |
359 | int (*)(struct task_struct *, void *), void *); | |
33398cf2 | 360 | |
23047a96 JW |
361 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
362 | { | |
363 | if (mem_cgroup_disabled()) | |
364 | return 0; | |
365 | ||
73f576c0 | 366 | return memcg->id.id; |
23047a96 | 367 | } |
73f576c0 | 368 | struct mem_cgroup *mem_cgroup_from_id(unsigned short id); |
23047a96 | 369 | |
2262185c RG |
370 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
371 | { | |
372 | struct mem_cgroup_per_node *mz; | |
373 | ||
374 | if (mem_cgroup_disabled()) | |
375 | return NULL; | |
376 | ||
377 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
378 | return mz->memcg; | |
379 | } | |
380 | ||
8e8ae645 JW |
381 | /** |
382 | * parent_mem_cgroup - find the accounting parent of a memcg | |
383 | * @memcg: memcg whose parent to find | |
384 | * | |
385 | * Returns the parent memcg, or NULL if this is the root or the memory | |
386 | * controller is in legacy no-hierarchy mode. | |
387 | */ | |
388 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) | |
389 | { | |
390 | if (!memcg->memory.parent) | |
391 | return NULL; | |
392 | return mem_cgroup_from_counter(memcg->memory.parent, memory); | |
393 | } | |
394 | ||
33398cf2 MH |
395 | static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, |
396 | struct mem_cgroup *root) | |
397 | { | |
398 | if (root == memcg) | |
399 | return true; | |
400 | if (!root->use_hierarchy) | |
401 | return false; | |
402 | return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup); | |
403 | } | |
e1aab161 | 404 | |
2314b42d JW |
405 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
406 | struct mem_cgroup *memcg) | |
2e4d4091 | 407 | { |
587af308 | 408 | struct mem_cgroup *task_memcg; |
413918bb | 409 | bool match = false; |
c3ac9a8a | 410 | |
2e4d4091 | 411 | rcu_read_lock(); |
587af308 | 412 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
413918bb | 413 | if (task_memcg) |
2314b42d | 414 | match = mem_cgroup_is_descendant(task_memcg, memcg); |
2e4d4091 | 415 | rcu_read_unlock(); |
c3ac9a8a | 416 | return match; |
2e4d4091 | 417 | } |
8a9f3ccd | 418 | |
64219994 | 419 | struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page); |
2fc04524 | 420 | ino_t page_cgroup_ino(struct page *page); |
d324236b | 421 | |
eb01aaab VD |
422 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
423 | { | |
424 | if (mem_cgroup_disabled()) | |
425 | return true; | |
426 | return !!(memcg->css.flags & CSS_ONLINE); | |
427 | } | |
428 | ||
58ae83db KH |
429 | /* |
430 | * For memory reclaim. | |
431 | */ | |
889976db | 432 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
33398cf2 MH |
433 | |
434 | void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, | |
b4536f0c | 435 | int zid, int nr_pages); |
33398cf2 | 436 | |
0a6b76dd VD |
437 | unsigned long mem_cgroup_node_nr_lru_pages(struct mem_cgroup *memcg, |
438 | int nid, unsigned int lru_mask); | |
439 | ||
33398cf2 MH |
440 | static inline |
441 | unsigned long mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru) | |
442 | { | |
ef8f2327 | 443 | struct mem_cgroup_per_node *mz; |
b4536f0c MH |
444 | unsigned long nr_pages = 0; |
445 | int zid; | |
33398cf2 | 446 | |
ef8f2327 | 447 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); |
b4536f0c MH |
448 | for (zid = 0; zid < MAX_NR_ZONES; zid++) |
449 | nr_pages += mz->lru_zone_size[zid][lru]; | |
450 | return nr_pages; | |
451 | } | |
452 | ||
453 | static inline | |
454 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
455 | enum lru_list lru, int zone_idx) | |
456 | { | |
457 | struct mem_cgroup_per_node *mz; | |
458 | ||
459 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
460 | return mz->lru_zone_size[zone_idx][lru]; | |
33398cf2 MH |
461 | } |
462 | ||
b23afb93 TH |
463 | void mem_cgroup_handle_over_high(void); |
464 | ||
7c5f64f8 VD |
465 | unsigned long mem_cgroup_get_limit(struct mem_cgroup *memcg); |
466 | ||
64219994 MH |
467 | void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, |
468 | struct task_struct *p); | |
58ae83db | 469 | |
49426420 | 470 | static inline void mem_cgroup_oom_enable(void) |
519e5247 | 471 | { |
626ebc41 TH |
472 | WARN_ON(current->memcg_may_oom); |
473 | current->memcg_may_oom = 1; | |
519e5247 JW |
474 | } |
475 | ||
49426420 | 476 | static inline void mem_cgroup_oom_disable(void) |
519e5247 | 477 | { |
626ebc41 TH |
478 | WARN_ON(!current->memcg_may_oom); |
479 | current->memcg_may_oom = 0; | |
519e5247 JW |
480 | } |
481 | ||
3812c8c8 JW |
482 | static inline bool task_in_memcg_oom(struct task_struct *p) |
483 | { | |
626ebc41 | 484 | return p->memcg_in_oom; |
3812c8c8 JW |
485 | } |
486 | ||
49426420 | 487 | bool mem_cgroup_oom_synchronize(bool wait); |
3812c8c8 | 488 | |
c255a458 | 489 | #ifdef CONFIG_MEMCG_SWAP |
c077719b KH |
490 | extern int do_swap_account; |
491 | #endif | |
f8d66542 | 492 | |
739f79fc JW |
493 | struct mem_cgroup *lock_page_memcg(struct page *page); |
494 | void __unlock_page_memcg(struct mem_cgroup *memcg); | |
62cccb8c | 495 | void unlock_page_memcg(struct page *page); |
d7365e78 | 496 | |
04fecbf5 | 497 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
ccda7f43 | 498 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, |
04fecbf5 | 499 | int idx) |
2a2e4885 | 500 | { |
a983b5eb JW |
501 | long x = atomic_long_read(&memcg->stat[idx]); |
502 | #ifdef CONFIG_SMP | |
503 | if (x < 0) | |
504 | x = 0; | |
505 | #endif | |
506 | return x; | |
2a2e4885 JW |
507 | } |
508 | ||
04fecbf5 | 509 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 510 | static inline void __mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 511 | int idx, int val) |
2a2e4885 | 512 | { |
a983b5eb JW |
513 | long x; |
514 | ||
515 | if (mem_cgroup_disabled()) | |
516 | return; | |
517 | ||
518 | x = val + __this_cpu_read(memcg->stat_cpu->count[idx]); | |
519 | if (unlikely(abs(x) > MEMCG_CHARGE_BATCH)) { | |
520 | atomic_long_add(x, &memcg->stat[idx]); | |
521 | x = 0; | |
522 | } | |
523 | __this_cpu_write(memcg->stat_cpu->count[idx], x); | |
2a2e4885 JW |
524 | } |
525 | ||
04fecbf5 | 526 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 527 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 528 | int idx, int val) |
2a2e4885 | 529 | { |
c3cc3911 JW |
530 | unsigned long flags; |
531 | ||
532 | local_irq_save(flags); | |
a983b5eb | 533 | __mod_memcg_state(memcg, idx, val); |
c3cc3911 | 534 | local_irq_restore(flags); |
2a2e4885 JW |
535 | } |
536 | ||
33398cf2 | 537 | /** |
ccda7f43 | 538 | * mod_memcg_page_state - update page state statistics |
62cccb8c | 539 | * @page: the page |
33398cf2 MH |
540 | * @idx: page state item to account |
541 | * @val: number of pages (positive or negative) | |
542 | * | |
fdf1cdb9 JW |
543 | * The @page must be locked or the caller must use lock_page_memcg() |
544 | * to prevent double accounting when the page is concurrently being | |
545 | * moved to another memcg: | |
81f8c3a4 | 546 | * |
fdf1cdb9 | 547 | * lock_page(page) or lock_page_memcg(page) |
81f8c3a4 | 548 | * if (TestClearPageState(page)) |
ccda7f43 | 549 | * mod_memcg_page_state(page, state, -1); |
fdf1cdb9 | 550 | * unlock_page(page) or unlock_page_memcg(page) |
2a2e4885 JW |
551 | * |
552 | * Kernel pages are an exception to this, since they'll never move. | |
33398cf2 | 553 | */ |
00f3ca2c | 554 | static inline void __mod_memcg_page_state(struct page *page, |
04fecbf5 | 555 | int idx, int val) |
00f3ca2c JW |
556 | { |
557 | if (page->mem_cgroup) | |
558 | __mod_memcg_state(page->mem_cgroup, idx, val); | |
559 | } | |
560 | ||
ccda7f43 | 561 | static inline void mod_memcg_page_state(struct page *page, |
04fecbf5 | 562 | int idx, int val) |
33398cf2 | 563 | { |
62cccb8c | 564 | if (page->mem_cgroup) |
ccda7f43 | 565 | mod_memcg_state(page->mem_cgroup, idx, val); |
33398cf2 MH |
566 | } |
567 | ||
00f3ca2c JW |
568 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
569 | enum node_stat_item idx) | |
2a7106f2 | 570 | { |
00f3ca2c | 571 | struct mem_cgroup_per_node *pn; |
a983b5eb | 572 | long x; |
00f3ca2c JW |
573 | |
574 | if (mem_cgroup_disabled()) | |
575 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
576 | ||
577 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
a983b5eb JW |
578 | x = atomic_long_read(&pn->lruvec_stat[idx]); |
579 | #ifdef CONFIG_SMP | |
580 | if (x < 0) | |
581 | x = 0; | |
582 | #endif | |
583 | return x; | |
2a7106f2 GT |
584 | } |
585 | ||
00f3ca2c JW |
586 | static inline void __mod_lruvec_state(struct lruvec *lruvec, |
587 | enum node_stat_item idx, int val) | |
2a7106f2 | 588 | { |
00f3ca2c | 589 | struct mem_cgroup_per_node *pn; |
a983b5eb | 590 | long x; |
00f3ca2c | 591 | |
28454265 | 592 | /* Update node */ |
00f3ca2c | 593 | __mod_node_page_state(lruvec_pgdat(lruvec), idx, val); |
28454265 | 594 | |
00f3ca2c JW |
595 | if (mem_cgroup_disabled()) |
596 | return; | |
28454265 | 597 | |
00f3ca2c | 598 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); |
28454265 JW |
599 | |
600 | /* Update memcg */ | |
00f3ca2c | 601 | __mod_memcg_state(pn->memcg, idx, val); |
28454265 JW |
602 | |
603 | /* Update lruvec */ | |
a983b5eb JW |
604 | x = val + __this_cpu_read(pn->lruvec_stat_cpu->count[idx]); |
605 | if (unlikely(abs(x) > MEMCG_CHARGE_BATCH)) { | |
606 | atomic_long_add(x, &pn->lruvec_stat[idx]); | |
607 | x = 0; | |
608 | } | |
609 | __this_cpu_write(pn->lruvec_stat_cpu->count[idx], x); | |
00f3ca2c JW |
610 | } |
611 | ||
612 | static inline void mod_lruvec_state(struct lruvec *lruvec, | |
613 | enum node_stat_item idx, int val) | |
614 | { | |
c3cc3911 JW |
615 | unsigned long flags; |
616 | ||
617 | local_irq_save(flags); | |
28454265 | 618 | __mod_lruvec_state(lruvec, idx, val); |
c3cc3911 | 619 | local_irq_restore(flags); |
00f3ca2c JW |
620 | } |
621 | ||
622 | static inline void __mod_lruvec_page_state(struct page *page, | |
623 | enum node_stat_item idx, int val) | |
624 | { | |
28454265 JW |
625 | pg_data_t *pgdat = page_pgdat(page); |
626 | struct lruvec *lruvec; | |
00f3ca2c | 627 | |
28454265 JW |
628 | /* Untracked pages have no memcg, no lruvec. Update only the node */ |
629 | if (!page->mem_cgroup) { | |
630 | __mod_node_page_state(pgdat, idx, val); | |
00f3ca2c | 631 | return; |
28454265 JW |
632 | } |
633 | ||
634 | lruvec = mem_cgroup_lruvec(pgdat, page->mem_cgroup); | |
635 | __mod_lruvec_state(lruvec, idx, val); | |
00f3ca2c JW |
636 | } |
637 | ||
638 | static inline void mod_lruvec_page_state(struct page *page, | |
639 | enum node_stat_item idx, int val) | |
640 | { | |
c3cc3911 JW |
641 | unsigned long flags; |
642 | ||
643 | local_irq_save(flags); | |
28454265 | 644 | __mod_lruvec_page_state(page, idx, val); |
c3cc3911 | 645 | local_irq_restore(flags); |
2a7106f2 GT |
646 | } |
647 | ||
ef8f2327 | 648 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
649 | gfp_t gfp_mask, |
650 | unsigned long *total_scanned); | |
a63d83f4 | 651 | |
c9019e9b | 652 | static inline void __count_memcg_events(struct mem_cgroup *memcg, |
e27be240 JW |
653 | enum vm_event_item idx, |
654 | unsigned long count) | |
c9019e9b | 655 | { |
a983b5eb JW |
656 | unsigned long x; |
657 | ||
658 | if (mem_cgroup_disabled()) | |
659 | return; | |
660 | ||
661 | x = count + __this_cpu_read(memcg->stat_cpu->events[idx]); | |
662 | if (unlikely(x > MEMCG_CHARGE_BATCH)) { | |
663 | atomic_long_add(x, &memcg->events[idx]); | |
664 | x = 0; | |
665 | } | |
666 | __this_cpu_write(memcg->stat_cpu->events[idx], x); | |
c9019e9b JW |
667 | } |
668 | ||
2262185c | 669 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
e27be240 JW |
670 | enum vm_event_item idx, |
671 | unsigned long count) | |
2262185c | 672 | { |
c3cc3911 JW |
673 | unsigned long flags; |
674 | ||
675 | local_irq_save(flags); | |
a983b5eb | 676 | __count_memcg_events(memcg, idx, count); |
c3cc3911 | 677 | local_irq_restore(flags); |
2262185c RG |
678 | } |
679 | ||
680 | static inline void count_memcg_page_event(struct page *page, | |
e27be240 | 681 | enum vm_event_item idx) |
2262185c RG |
682 | { |
683 | if (page->mem_cgroup) | |
684 | count_memcg_events(page->mem_cgroup, idx, 1); | |
685 | } | |
686 | ||
687 | static inline void count_memcg_event_mm(struct mm_struct *mm, | |
688 | enum vm_event_item idx) | |
68ae564b | 689 | { |
33398cf2 MH |
690 | struct mem_cgroup *memcg; |
691 | ||
68ae564b DR |
692 | if (mem_cgroup_disabled()) |
693 | return; | |
33398cf2 MH |
694 | |
695 | rcu_read_lock(); | |
696 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
8e675f7a | 697 | if (likely(memcg)) { |
c9019e9b | 698 | count_memcg_events(memcg, idx, 1); |
8e675f7a KK |
699 | if (idx == OOM_KILL) |
700 | cgroup_file_notify(&memcg->events_file); | |
701 | } | |
33398cf2 | 702 | rcu_read_unlock(); |
68ae564b | 703 | } |
c9019e9b | 704 | |
e27be240 JW |
705 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
706 | enum memcg_memory_event event) | |
c9019e9b | 707 | { |
e27be240 | 708 | atomic_long_inc(&memcg->memory_events[event]); |
c9019e9b JW |
709 | cgroup_file_notify(&memcg->events_file); |
710 | } | |
711 | ||
ca3e0214 | 712 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
e94c8a9c | 713 | void mem_cgroup_split_huge_fixup(struct page *head); |
ca3e0214 KH |
714 | #endif |
715 | ||
c255a458 | 716 | #else /* CONFIG_MEMCG */ |
23047a96 JW |
717 | |
718 | #define MEM_CGROUP_ID_SHIFT 0 | |
719 | #define MEM_CGROUP_ID_MAX 0 | |
720 | ||
7a81b88c KH |
721 | struct mem_cgroup; |
722 | ||
23047a96 JW |
723 | static inline bool mem_cgroup_disabled(void) |
724 | { | |
725 | return true; | |
726 | } | |
727 | ||
e27be240 JW |
728 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
729 | enum memcg_memory_event event) | |
241994ed JW |
730 | { |
731 | } | |
732 | ||
733 | static inline bool mem_cgroup_low(struct mem_cgroup *root, | |
734 | struct mem_cgroup *memcg) | |
735 | { | |
736 | return false; | |
737 | } | |
738 | ||
00501b53 JW |
739 | static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
740 | gfp_t gfp_mask, | |
f627c2f5 KS |
741 | struct mem_cgroup **memcgp, |
742 | bool compound) | |
7a81b88c | 743 | { |
00501b53 | 744 | *memcgp = NULL; |
7a81b88c KH |
745 | return 0; |
746 | } | |
747 | ||
00501b53 JW |
748 | static inline void mem_cgroup_commit_charge(struct page *page, |
749 | struct mem_cgroup *memcg, | |
f627c2f5 | 750 | bool lrucare, bool compound) |
7a81b88c KH |
751 | { |
752 | } | |
753 | ||
00501b53 | 754 | static inline void mem_cgroup_cancel_charge(struct page *page, |
f627c2f5 KS |
755 | struct mem_cgroup *memcg, |
756 | bool compound) | |
7a81b88c KH |
757 | { |
758 | } | |
759 | ||
0a31bc97 | 760 | static inline void mem_cgroup_uncharge(struct page *page) |
569b846d KH |
761 | { |
762 | } | |
763 | ||
747db954 | 764 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
8a9f3ccd BS |
765 | { |
766 | } | |
767 | ||
6a93ca8f | 768 | static inline void mem_cgroup_migrate(struct page *old, struct page *new) |
69029cd5 KH |
769 | { |
770 | } | |
771 | ||
a9dd0a83 | 772 | static inline struct lruvec *mem_cgroup_lruvec(struct pglist_data *pgdat, |
ef8f2327 | 773 | struct mem_cgroup *memcg) |
08e552c6 | 774 | { |
a9dd0a83 | 775 | return node_lruvec(pgdat); |
08e552c6 KH |
776 | } |
777 | ||
fa9add64 | 778 | static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, |
599d0c95 | 779 | struct pglist_data *pgdat) |
66e1707b | 780 | { |
599d0c95 | 781 | return &pgdat->lruvec; |
66e1707b BS |
782 | } |
783 | ||
587af308 | 784 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
c0ff4b85 | 785 | struct mem_cgroup *memcg) |
bed7161a | 786 | { |
587af308 | 787 | return true; |
bed7161a BS |
788 | } |
789 | ||
ffbdccf5 DR |
790 | static inline bool task_in_mem_cgroup(struct task_struct *task, |
791 | const struct mem_cgroup *memcg) | |
4c4a2214 | 792 | { |
ffbdccf5 | 793 | return true; |
4c4a2214 DR |
794 | } |
795 | ||
5660048c JW |
796 | static inline struct mem_cgroup * |
797 | mem_cgroup_iter(struct mem_cgroup *root, | |
798 | struct mem_cgroup *prev, | |
799 | struct mem_cgroup_reclaim_cookie *reclaim) | |
800 | { | |
801 | return NULL; | |
802 | } | |
803 | ||
804 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
805 | struct mem_cgroup *prev) | |
806 | { | |
807 | } | |
808 | ||
7c5f64f8 VD |
809 | static inline int mem_cgroup_scan_tasks(struct mem_cgroup *memcg, |
810 | int (*fn)(struct task_struct *, void *), void *arg) | |
811 | { | |
812 | return 0; | |
813 | } | |
814 | ||
23047a96 | 815 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
f8d66542 | 816 | { |
23047a96 JW |
817 | return 0; |
818 | } | |
819 | ||
820 | static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id) | |
821 | { | |
822 | WARN_ON_ONCE(id); | |
823 | /* XXX: This should always return root_mem_cgroup */ | |
824 | return NULL; | |
f8d66542 | 825 | } |
a636b327 | 826 | |
2262185c RG |
827 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
828 | { | |
829 | return NULL; | |
830 | } | |
831 | ||
eb01aaab | 832 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
14797e23 | 833 | { |
13308ca9 | 834 | return true; |
14797e23 KM |
835 | } |
836 | ||
a3d8e054 | 837 | static inline unsigned long |
4d7dcca2 | 838 | mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru) |
a3d8e054 KM |
839 | { |
840 | return 0; | |
841 | } | |
b4536f0c MH |
842 | static inline |
843 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
844 | enum lru_list lru, int zone_idx) | |
845 | { | |
846 | return 0; | |
847 | } | |
a3d8e054 | 848 | |
0a6b76dd VD |
849 | static inline unsigned long |
850 | mem_cgroup_node_nr_lru_pages(struct mem_cgroup *memcg, | |
851 | int nid, unsigned int lru_mask) | |
852 | { | |
853 | return 0; | |
854 | } | |
855 | ||
7c5f64f8 VD |
856 | static inline unsigned long mem_cgroup_get_limit(struct mem_cgroup *memcg) |
857 | { | |
858 | return 0; | |
859 | } | |
860 | ||
e222432b BS |
861 | static inline void |
862 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) | |
863 | { | |
864 | } | |
865 | ||
739f79fc JW |
866 | static inline struct mem_cgroup *lock_page_memcg(struct page *page) |
867 | { | |
868 | return NULL; | |
869 | } | |
870 | ||
871 | static inline void __unlock_page_memcg(struct mem_cgroup *memcg) | |
89c06bd5 KH |
872 | { |
873 | } | |
874 | ||
62cccb8c | 875 | static inline void unlock_page_memcg(struct page *page) |
89c06bd5 KH |
876 | { |
877 | } | |
878 | ||
b23afb93 TH |
879 | static inline void mem_cgroup_handle_over_high(void) |
880 | { | |
881 | } | |
882 | ||
49426420 | 883 | static inline void mem_cgroup_oom_enable(void) |
519e5247 JW |
884 | { |
885 | } | |
886 | ||
49426420 | 887 | static inline void mem_cgroup_oom_disable(void) |
519e5247 JW |
888 | { |
889 | } | |
890 | ||
3812c8c8 JW |
891 | static inline bool task_in_memcg_oom(struct task_struct *p) |
892 | { | |
893 | return false; | |
894 | } | |
895 | ||
49426420 | 896 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
3812c8c8 JW |
897 | { |
898 | return false; | |
899 | } | |
900 | ||
ccda7f43 | 901 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, |
04fecbf5 | 902 | int idx) |
2a2e4885 JW |
903 | { |
904 | return 0; | |
905 | } | |
906 | ||
00f3ca2c | 907 | static inline void __mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 908 | int idx, |
00f3ca2c | 909 | int nr) |
2a2e4885 JW |
910 | { |
911 | } | |
912 | ||
00f3ca2c | 913 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 914 | int idx, |
00f3ca2c | 915 | int nr) |
2a2e4885 JW |
916 | { |
917 | } | |
918 | ||
00f3ca2c | 919 | static inline void __mod_memcg_page_state(struct page *page, |
04fecbf5 | 920 | int idx, |
00f3ca2c | 921 | int nr) |
2a2e4885 JW |
922 | { |
923 | } | |
924 | ||
ccda7f43 | 925 | static inline void mod_memcg_page_state(struct page *page, |
04fecbf5 | 926 | int idx, |
ccda7f43 | 927 | int nr) |
553af430 JW |
928 | { |
929 | } | |
930 | ||
00f3ca2c JW |
931 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
932 | enum node_stat_item idx) | |
2a7106f2 | 933 | { |
00f3ca2c | 934 | return node_page_state(lruvec_pgdat(lruvec), idx); |
2a7106f2 GT |
935 | } |
936 | ||
00f3ca2c JW |
937 | static inline void __mod_lruvec_state(struct lruvec *lruvec, |
938 | enum node_stat_item idx, int val) | |
d69b042f | 939 | { |
00f3ca2c JW |
940 | __mod_node_page_state(lruvec_pgdat(lruvec), idx, val); |
941 | } | |
942 | ||
943 | static inline void mod_lruvec_state(struct lruvec *lruvec, | |
944 | enum node_stat_item idx, int val) | |
945 | { | |
946 | mod_node_page_state(lruvec_pgdat(lruvec), idx, val); | |
947 | } | |
948 | ||
949 | static inline void __mod_lruvec_page_state(struct page *page, | |
950 | enum node_stat_item idx, int val) | |
951 | { | |
952 | __mod_node_page_state(page_pgdat(page), idx, val); | |
953 | } | |
954 | ||
955 | static inline void mod_lruvec_page_state(struct page *page, | |
956 | enum node_stat_item idx, int val) | |
957 | { | |
958 | mod_node_page_state(page_pgdat(page), idx, val); | |
d69b042f BS |
959 | } |
960 | ||
4e416953 | 961 | static inline |
ef8f2327 | 962 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
963 | gfp_t gfp_mask, |
964 | unsigned long *total_scanned) | |
4e416953 | 965 | { |
0608f43d | 966 | return 0; |
4e416953 BS |
967 | } |
968 | ||
e94c8a9c | 969 | static inline void mem_cgroup_split_huge_fixup(struct page *head) |
ca3e0214 KH |
970 | { |
971 | } | |
972 | ||
2262185c RG |
973 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
974 | enum vm_event_item idx, | |
975 | unsigned long count) | |
976 | { | |
977 | } | |
978 | ||
979 | static inline void count_memcg_page_event(struct page *page, | |
04fecbf5 | 980 | int idx) |
2262185c RG |
981 | { |
982 | } | |
983 | ||
456f998e | 984 | static inline |
2262185c | 985 | void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx) |
456f998e YH |
986 | { |
987 | } | |
c255a458 | 988 | #endif /* CONFIG_MEMCG */ |
78fb7466 | 989 | |
04fecbf5 | 990 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 991 | static inline void __inc_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 992 | int idx) |
00f3ca2c JW |
993 | { |
994 | __mod_memcg_state(memcg, idx, 1); | |
995 | } | |
996 | ||
04fecbf5 | 997 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 998 | static inline void __dec_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 999 | int idx) |
00f3ca2c JW |
1000 | { |
1001 | __mod_memcg_state(memcg, idx, -1); | |
1002 | } | |
1003 | ||
04fecbf5 | 1004 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1005 | static inline void __inc_memcg_page_state(struct page *page, |
04fecbf5 | 1006 | int idx) |
00f3ca2c JW |
1007 | { |
1008 | __mod_memcg_page_state(page, idx, 1); | |
1009 | } | |
1010 | ||
04fecbf5 | 1011 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1012 | static inline void __dec_memcg_page_state(struct page *page, |
04fecbf5 | 1013 | int idx) |
00f3ca2c JW |
1014 | { |
1015 | __mod_memcg_page_state(page, idx, -1); | |
1016 | } | |
1017 | ||
1018 | static inline void __inc_lruvec_state(struct lruvec *lruvec, | |
1019 | enum node_stat_item idx) | |
1020 | { | |
1021 | __mod_lruvec_state(lruvec, idx, 1); | |
1022 | } | |
1023 | ||
1024 | static inline void __dec_lruvec_state(struct lruvec *lruvec, | |
1025 | enum node_stat_item idx) | |
1026 | { | |
1027 | __mod_lruvec_state(lruvec, idx, -1); | |
1028 | } | |
1029 | ||
1030 | static inline void __inc_lruvec_page_state(struct page *page, | |
1031 | enum node_stat_item idx) | |
1032 | { | |
1033 | __mod_lruvec_page_state(page, idx, 1); | |
1034 | } | |
1035 | ||
1036 | static inline void __dec_lruvec_page_state(struct page *page, | |
1037 | enum node_stat_item idx) | |
1038 | { | |
1039 | __mod_lruvec_page_state(page, idx, -1); | |
1040 | } | |
1041 | ||
04fecbf5 | 1042 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1043 | static inline void inc_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1044 | int idx) |
00f3ca2c JW |
1045 | { |
1046 | mod_memcg_state(memcg, idx, 1); | |
1047 | } | |
1048 | ||
04fecbf5 | 1049 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1050 | static inline void dec_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1051 | int idx) |
00f3ca2c JW |
1052 | { |
1053 | mod_memcg_state(memcg, idx, -1); | |
1054 | } | |
1055 | ||
04fecbf5 | 1056 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1057 | static inline void inc_memcg_page_state(struct page *page, |
04fecbf5 | 1058 | int idx) |
00f3ca2c JW |
1059 | { |
1060 | mod_memcg_page_state(page, idx, 1); | |
1061 | } | |
1062 | ||
04fecbf5 | 1063 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1064 | static inline void dec_memcg_page_state(struct page *page, |
04fecbf5 | 1065 | int idx) |
00f3ca2c JW |
1066 | { |
1067 | mod_memcg_page_state(page, idx, -1); | |
1068 | } | |
1069 | ||
1070 | static inline void inc_lruvec_state(struct lruvec *lruvec, | |
1071 | enum node_stat_item idx) | |
1072 | { | |
1073 | mod_lruvec_state(lruvec, idx, 1); | |
1074 | } | |
1075 | ||
1076 | static inline void dec_lruvec_state(struct lruvec *lruvec, | |
1077 | enum node_stat_item idx) | |
1078 | { | |
1079 | mod_lruvec_state(lruvec, idx, -1); | |
1080 | } | |
1081 | ||
1082 | static inline void inc_lruvec_page_state(struct page *page, | |
1083 | enum node_stat_item idx) | |
1084 | { | |
1085 | mod_lruvec_page_state(page, idx, 1); | |
1086 | } | |
1087 | ||
1088 | static inline void dec_lruvec_page_state(struct page *page, | |
1089 | enum node_stat_item idx) | |
1090 | { | |
1091 | mod_lruvec_page_state(page, idx, -1); | |
1092 | } | |
1093 | ||
52ebea74 | 1094 | #ifdef CONFIG_CGROUP_WRITEBACK |
841710aa | 1095 | |
52ebea74 | 1096 | struct list_head *mem_cgroup_cgwb_list(struct mem_cgroup *memcg); |
841710aa | 1097 | struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb); |
c5edf9cd TH |
1098 | void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages, |
1099 | unsigned long *pheadroom, unsigned long *pdirty, | |
1100 | unsigned long *pwriteback); | |
841710aa TH |
1101 | |
1102 | #else /* CONFIG_CGROUP_WRITEBACK */ | |
1103 | ||
1104 | static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb) | |
1105 | { | |
1106 | return NULL; | |
1107 | } | |
1108 | ||
c2aa723a | 1109 | static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb, |
c5edf9cd TH |
1110 | unsigned long *pfilepages, |
1111 | unsigned long *pheadroom, | |
c2aa723a TH |
1112 | unsigned long *pdirty, |
1113 | unsigned long *pwriteback) | |
1114 | { | |
1115 | } | |
1116 | ||
841710aa | 1117 | #endif /* CONFIG_CGROUP_WRITEBACK */ |
52ebea74 | 1118 | |
e1aab161 | 1119 | struct sock; |
baac50bb JW |
1120 | bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); |
1121 | void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); | |
d886f4e4 | 1122 | #ifdef CONFIG_MEMCG |
ef12947c JW |
1123 | extern struct static_key_false memcg_sockets_enabled_key; |
1124 | #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key) | |
2d758073 JW |
1125 | void mem_cgroup_sk_alloc(struct sock *sk); |
1126 | void mem_cgroup_sk_free(struct sock *sk); | |
baac50bb | 1127 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c | 1128 | { |
0db15298 | 1129 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && memcg->tcpmem_pressure) |
8e8ae645 | 1130 | return true; |
8e8ae645 JW |
1131 | do { |
1132 | if (time_before(jiffies, memcg->socket_pressure)) | |
1133 | return true; | |
1134 | } while ((memcg = parent_mem_cgroup(memcg))); | |
1135 | return false; | |
e805605c JW |
1136 | } |
1137 | #else | |
80e95fe0 | 1138 | #define mem_cgroup_sockets_enabled 0 |
2d758073 JW |
1139 | static inline void mem_cgroup_sk_alloc(struct sock *sk) { }; |
1140 | static inline void mem_cgroup_sk_free(struct sock *sk) { }; | |
baac50bb | 1141 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c JW |
1142 | { |
1143 | return false; | |
1144 | } | |
1145 | #endif | |
7ae1e1d0 | 1146 | |
45264778 VD |
1147 | struct kmem_cache *memcg_kmem_get_cache(struct kmem_cache *cachep); |
1148 | void memcg_kmem_put_cache(struct kmem_cache *cachep); | |
1149 | int memcg_kmem_charge_memcg(struct page *page, gfp_t gfp, int order, | |
1150 | struct mem_cgroup *memcg); | |
1151 | int memcg_kmem_charge(struct page *page, gfp_t gfp, int order); | |
1152 | void memcg_kmem_uncharge(struct page *page, int order); | |
1153 | ||
127424c8 | 1154 | #if defined(CONFIG_MEMCG) && !defined(CONFIG_SLOB) |
ef12947c | 1155 | extern struct static_key_false memcg_kmem_enabled_key; |
17cc4dfe | 1156 | extern struct workqueue_struct *memcg_kmem_cache_wq; |
749c5415 | 1157 | |
dbcf73e2 | 1158 | extern int memcg_nr_cache_ids; |
64219994 MH |
1159 | void memcg_get_cache_ids(void); |
1160 | void memcg_put_cache_ids(void); | |
ebe945c2 GC |
1161 | |
1162 | /* | |
1163 | * Helper macro to loop through all memcg-specific caches. Callers must still | |
1164 | * check if the cache is valid (it is either valid or NULL). | |
1165 | * the slab_mutex must be held when looping through those caches | |
1166 | */ | |
749c5415 | 1167 | #define for_each_memcg_cache_index(_idx) \ |
dbcf73e2 | 1168 | for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++) |
749c5415 | 1169 | |
7ae1e1d0 GC |
1170 | static inline bool memcg_kmem_enabled(void) |
1171 | { | |
ef12947c | 1172 | return static_branch_unlikely(&memcg_kmem_enabled_key); |
7ae1e1d0 GC |
1173 | } |
1174 | ||
33398cf2 | 1175 | /* |
9f706d68 | 1176 | * helper for accessing a memcg's index. It will be used as an index in the |
33398cf2 MH |
1177 | * child cache array in kmem_cache, and also to derive its name. This function |
1178 | * will return -1 when this is not a kmem-limited memcg. | |
1179 | */ | |
1180 | static inline int memcg_cache_id(struct mem_cgroup *memcg) | |
1181 | { | |
1182 | return memcg ? memcg->kmemcg_id : -1; | |
1183 | } | |
5722d094 | 1184 | |
7ae1e1d0 | 1185 | #else |
749c5415 GC |
1186 | #define for_each_memcg_cache_index(_idx) \ |
1187 | for (; NULL; ) | |
1188 | ||
b9ce5ef4 GC |
1189 | static inline bool memcg_kmem_enabled(void) |
1190 | { | |
1191 | return false; | |
1192 | } | |
1193 | ||
2633d7a0 GC |
1194 | static inline int memcg_cache_id(struct mem_cgroup *memcg) |
1195 | { | |
1196 | return -1; | |
1197 | } | |
1198 | ||
05257a1a VD |
1199 | static inline void memcg_get_cache_ids(void) |
1200 | { | |
1201 | } | |
1202 | ||
1203 | static inline void memcg_put_cache_ids(void) | |
1204 | { | |
1205 | } | |
1206 | ||
127424c8 JW |
1207 | #endif /* CONFIG_MEMCG && !CONFIG_SLOB */ |
1208 | ||
8cdea7c0 | 1209 | #endif /* _LINUX_MEMCONTROL_H */ |