]>
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, | |
fe6bdfc8 | 56 | MEMCG_OOM_KILL, |
f3a53a3a TH |
57 | MEMCG_SWAP_MAX, |
58 | MEMCG_SWAP_FAIL, | |
e27be240 | 59 | MEMCG_NR_MEMORY_EVENTS, |
71cd3113 JW |
60 | }; |
61 | ||
bf8d5d52 RG |
62 | enum mem_cgroup_protection { |
63 | MEMCG_PROT_NONE, | |
64 | MEMCG_PROT_LOW, | |
65 | MEMCG_PROT_MIN, | |
66 | }; | |
67 | ||
5660048c | 68 | struct mem_cgroup_reclaim_cookie { |
ef8f2327 | 69 | pg_data_t *pgdat; |
5660048c JW |
70 | int priority; |
71 | unsigned int generation; | |
72 | }; | |
73 | ||
71cd3113 JW |
74 | #ifdef CONFIG_MEMCG |
75 | ||
76 | #define MEM_CGROUP_ID_SHIFT 16 | |
77 | #define MEM_CGROUP_ID_MAX USHRT_MAX | |
78 | ||
79 | struct mem_cgroup_id { | |
80 | int id; | |
1c2d479a | 81 | refcount_t ref; |
71cd3113 JW |
82 | }; |
83 | ||
33398cf2 MH |
84 | /* |
85 | * Per memcg event counter is incremented at every pagein/pageout. With THP, | |
86 | * it will be incremated by the number of pages. This counter is used for | |
87 | * for trigger some periodic events. This is straightforward and better | |
88 | * than using jiffies etc. to handle periodic memcg event. | |
89 | */ | |
90 | enum mem_cgroup_events_target { | |
91 | MEM_CGROUP_TARGET_THRESH, | |
92 | MEM_CGROUP_TARGET_SOFTLIMIT, | |
93 | MEM_CGROUP_TARGET_NUMAINFO, | |
94 | MEM_CGROUP_NTARGETS, | |
95 | }; | |
96 | ||
33398cf2 | 97 | struct mem_cgroup_stat_cpu { |
b2807f07 | 98 | long count[MEMCG_NR_STAT]; |
e27be240 | 99 | unsigned long events[NR_VM_EVENT_ITEMS]; |
33398cf2 MH |
100 | unsigned long nr_page_events; |
101 | unsigned long targets[MEM_CGROUP_NTARGETS]; | |
102 | }; | |
103 | ||
104 | struct mem_cgroup_reclaim_iter { | |
105 | struct mem_cgroup *position; | |
106 | /* scan generation, increased every round-trip */ | |
107 | unsigned int generation; | |
108 | }; | |
109 | ||
00f3ca2c JW |
110 | struct lruvec_stat { |
111 | long count[NR_VM_NODE_STAT_ITEMS]; | |
112 | }; | |
113 | ||
0a4465d3 KT |
114 | /* |
115 | * Bitmap of shrinker::id corresponding to memcg-aware shrinkers, | |
116 | * which have elements charged to this memcg. | |
117 | */ | |
118 | struct memcg_shrinker_map { | |
119 | struct rcu_head rcu; | |
120 | unsigned long map[0]; | |
121 | }; | |
122 | ||
33398cf2 MH |
123 | /* |
124 | * per-zone information in memory controller. | |
125 | */ | |
ef8f2327 | 126 | struct mem_cgroup_per_node { |
33398cf2 | 127 | struct lruvec lruvec; |
a983b5eb JW |
128 | |
129 | struct lruvec_stat __percpu *lruvec_stat_cpu; | |
130 | atomic_long_t lruvec_stat[NR_VM_NODE_STAT_ITEMS]; | |
131 | ||
b4536f0c | 132 | unsigned long lru_zone_size[MAX_NR_ZONES][NR_LRU_LISTS]; |
33398cf2 MH |
133 | |
134 | struct mem_cgroup_reclaim_iter iter[DEF_PRIORITY + 1]; | |
135 | ||
0a4465d3 KT |
136 | #ifdef CONFIG_MEMCG_KMEM |
137 | struct memcg_shrinker_map __rcu *shrinker_map; | |
138 | #endif | |
33398cf2 MH |
139 | struct rb_node tree_node; /* RB tree node */ |
140 | unsigned long usage_in_excess;/* Set to the value by which */ | |
141 | /* the soft limit is exceeded*/ | |
142 | bool on_tree; | |
e3c1ac58 AR |
143 | bool congested; /* memcg has many dirty pages */ |
144 | /* backed by a congested BDI */ | |
145 | ||
33398cf2 MH |
146 | struct mem_cgroup *memcg; /* Back pointer, we cannot */ |
147 | /* use container_of */ | |
148 | }; | |
149 | ||
33398cf2 MH |
150 | struct mem_cgroup_threshold { |
151 | struct eventfd_ctx *eventfd; | |
152 | unsigned long threshold; | |
153 | }; | |
154 | ||
155 | /* For threshold */ | |
156 | struct mem_cgroup_threshold_ary { | |
157 | /* An array index points to threshold just below or equal to usage. */ | |
158 | int current_threshold; | |
159 | /* Size of entries[] */ | |
160 | unsigned int size; | |
161 | /* Array of thresholds */ | |
162 | struct mem_cgroup_threshold entries[0]; | |
163 | }; | |
164 | ||
165 | struct mem_cgroup_thresholds { | |
166 | /* Primary thresholds array */ | |
167 | struct mem_cgroup_threshold_ary *primary; | |
168 | /* | |
169 | * Spare threshold array. | |
170 | * This is needed to make mem_cgroup_unregister_event() "never fail". | |
171 | * It must be able to store at least primary->size - 1 entries. | |
172 | */ | |
173 | struct mem_cgroup_threshold_ary *spare; | |
174 | }; | |
175 | ||
567e9ab2 JW |
176 | enum memcg_kmem_state { |
177 | KMEM_NONE, | |
178 | KMEM_ALLOCATED, | |
179 | KMEM_ONLINE, | |
180 | }; | |
181 | ||
e81bf979 AL |
182 | #if defined(CONFIG_SMP) |
183 | struct memcg_padding { | |
184 | char x[0]; | |
185 | } ____cacheline_internodealigned_in_smp; | |
186 | #define MEMCG_PADDING(name) struct memcg_padding name; | |
187 | #else | |
188 | #define MEMCG_PADDING(name) | |
189 | #endif | |
190 | ||
33398cf2 MH |
191 | /* |
192 | * The memory controller data structure. The memory controller controls both | |
193 | * page cache and RSS per cgroup. We would eventually like to provide | |
194 | * statistics based on the statistics developed by Rik Van Riel for clock-pro, | |
195 | * to help the administrator determine what knobs to tune. | |
196 | */ | |
197 | struct mem_cgroup { | |
198 | struct cgroup_subsys_state css; | |
199 | ||
73f576c0 JW |
200 | /* Private memcg ID. Used to ID objects that outlive the cgroup */ |
201 | struct mem_cgroup_id id; | |
202 | ||
33398cf2 MH |
203 | /* Accounted resources */ |
204 | struct page_counter memory; | |
37e84351 | 205 | struct page_counter swap; |
0db15298 JW |
206 | |
207 | /* Legacy consumer-oriented counters */ | |
33398cf2 MH |
208 | struct page_counter memsw; |
209 | struct page_counter kmem; | |
0db15298 | 210 | struct page_counter tcpmem; |
33398cf2 | 211 | |
23067153 | 212 | /* Upper bound of normal memory consumption range */ |
33398cf2 MH |
213 | unsigned long high; |
214 | ||
f7e1cb6e JW |
215 | /* Range enforcement for interrupt charges */ |
216 | struct work_struct high_work; | |
217 | ||
33398cf2 MH |
218 | unsigned long soft_limit; |
219 | ||
220 | /* vmpressure notifications */ | |
221 | struct vmpressure vmpressure; | |
222 | ||
33398cf2 MH |
223 | /* |
224 | * Should the accounting and control be hierarchical, per subtree? | |
225 | */ | |
226 | bool use_hierarchy; | |
227 | ||
3d8b38eb RG |
228 | /* |
229 | * Should the OOM killer kill all belonging tasks, had it kill one? | |
230 | */ | |
231 | bool oom_group; | |
232 | ||
33398cf2 MH |
233 | /* protected by memcg_oom_lock */ |
234 | bool oom_lock; | |
235 | int under_oom; | |
236 | ||
237 | int swappiness; | |
238 | /* OOM-Killer disable */ | |
239 | int oom_kill_disable; | |
240 | ||
e27be240 | 241 | /* memory.events */ |
472912a2 TH |
242 | struct cgroup_file events_file; |
243 | ||
f3a53a3a TH |
244 | /* handle for "memory.swap.events" */ |
245 | struct cgroup_file swap_events_file; | |
246 | ||
33398cf2 MH |
247 | /* protect arrays of thresholds */ |
248 | struct mutex thresholds_lock; | |
249 | ||
250 | /* thresholds for memory usage. RCU-protected */ | |
251 | struct mem_cgroup_thresholds thresholds; | |
252 | ||
253 | /* thresholds for mem+swap usage. RCU-protected */ | |
254 | struct mem_cgroup_thresholds memsw_thresholds; | |
255 | ||
256 | /* For oom notifier event fd */ | |
257 | struct list_head oom_notify; | |
258 | ||
259 | /* | |
260 | * Should we move charges of a task when a task is moved into this | |
261 | * mem_cgroup ? And what type of charges should we move ? | |
262 | */ | |
263 | unsigned long move_charge_at_immigrate; | |
e81bf979 AL |
264 | /* taken only while moving_account > 0 */ |
265 | spinlock_t move_lock; | |
266 | unsigned long move_lock_flags; | |
267 | ||
268 | MEMCG_PADDING(_pad1_); | |
269 | ||
33398cf2 MH |
270 | /* |
271 | * set > 0 if pages under this cgroup are moving to other cgroup. | |
272 | */ | |
273 | atomic_t moving_account; | |
33398cf2 | 274 | struct task_struct *move_lock_task; |
a983b5eb | 275 | |
e27be240 | 276 | /* memory.stat */ |
a983b5eb | 277 | struct mem_cgroup_stat_cpu __percpu *stat_cpu; |
e81bf979 AL |
278 | |
279 | MEMCG_PADDING(_pad2_); | |
280 | ||
a983b5eb | 281 | atomic_long_t stat[MEMCG_NR_STAT]; |
e27be240 | 282 | atomic_long_t events[NR_VM_EVENT_ITEMS]; |
e81bf979 | 283 | atomic_long_t memory_events[MEMCG_NR_MEMORY_EVENTS]; |
33398cf2 | 284 | |
d886f4e4 JW |
285 | unsigned long socket_pressure; |
286 | ||
287 | /* Legacy tcp memory accounting */ | |
0db15298 JW |
288 | bool tcpmem_active; |
289 | int tcpmem_pressure; | |
d886f4e4 | 290 | |
84c07d11 | 291 | #ifdef CONFIG_MEMCG_KMEM |
33398cf2 MH |
292 | /* Index in the kmem_cache->memcg_params.memcg_caches array */ |
293 | int kmemcg_id; | |
567e9ab2 | 294 | enum memcg_kmem_state kmem_state; |
bc2791f8 | 295 | struct list_head kmem_caches; |
33398cf2 MH |
296 | #endif |
297 | ||
298 | int last_scanned_node; | |
299 | #if MAX_NUMNODES > 1 | |
300 | nodemask_t scan_nodes; | |
301 | atomic_t numainfo_events; | |
302 | atomic_t numainfo_updating; | |
303 | #endif | |
304 | ||
305 | #ifdef CONFIG_CGROUP_WRITEBACK | |
306 | struct list_head cgwb_list; | |
307 | struct wb_domain cgwb_domain; | |
308 | #endif | |
309 | ||
310 | /* List of events which userspace want to receive */ | |
311 | struct list_head event_list; | |
312 | spinlock_t event_list_lock; | |
313 | ||
314 | struct mem_cgroup_per_node *nodeinfo[0]; | |
315 | /* WARNING: nodeinfo must be the last member here */ | |
316 | }; | |
7d828602 | 317 | |
a983b5eb JW |
318 | /* |
319 | * size of first charge trial. "32" comes from vmscan.c's magic value. | |
320 | * TODO: maybe necessary to use big numbers in big irons. | |
321 | */ | |
322 | #define MEMCG_CHARGE_BATCH 32U | |
323 | ||
7d828602 | 324 | extern struct mem_cgroup *root_mem_cgroup; |
56161634 | 325 | |
dfd2f10c KT |
326 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
327 | { | |
328 | return (memcg == root_mem_cgroup); | |
329 | } | |
330 | ||
23047a96 JW |
331 | static inline bool mem_cgroup_disabled(void) |
332 | { | |
333 | return !cgroup_subsys_enabled(memory_cgrp_subsys); | |
334 | } | |
335 | ||
bf8d5d52 RG |
336 | enum mem_cgroup_protection mem_cgroup_protected(struct mem_cgroup *root, |
337 | struct mem_cgroup *memcg); | |
241994ed | 338 | |
00501b53 | 339 | int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
f627c2f5 KS |
340 | gfp_t gfp_mask, struct mem_cgroup **memcgp, |
341 | bool compound); | |
2cf85583 TH |
342 | int mem_cgroup_try_charge_delay(struct page *page, struct mm_struct *mm, |
343 | gfp_t gfp_mask, struct mem_cgroup **memcgp, | |
344 | bool compound); | |
00501b53 | 345 | void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg, |
f627c2f5 KS |
346 | bool lrucare, bool compound); |
347 | void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg, | |
348 | bool compound); | |
0a31bc97 | 349 | void mem_cgroup_uncharge(struct page *page); |
747db954 | 350 | void mem_cgroup_uncharge_list(struct list_head *page_list); |
569b846d | 351 | |
6a93ca8f | 352 | void mem_cgroup_migrate(struct page *oldpage, struct page *newpage); |
569b846d | 353 | |
ef8f2327 MG |
354 | static struct mem_cgroup_per_node * |
355 | mem_cgroup_nodeinfo(struct mem_cgroup *memcg, int nid) | |
55779ec7 | 356 | { |
ef8f2327 | 357 | return memcg->nodeinfo[nid]; |
55779ec7 JW |
358 | } |
359 | ||
360 | /** | |
a9dd0a83 MG |
361 | * mem_cgroup_lruvec - get the lru list vector for a node or a memcg zone |
362 | * @node: node of the wanted lruvec | |
55779ec7 JW |
363 | * @memcg: memcg of the wanted lruvec |
364 | * | |
a9dd0a83 MG |
365 | * Returns the lru list vector holding pages for a given @node or a given |
366 | * @memcg and @zone. This can be the node lruvec, if the memory controller | |
55779ec7 JW |
367 | * is disabled. |
368 | */ | |
a9dd0a83 | 369 | static inline struct lruvec *mem_cgroup_lruvec(struct pglist_data *pgdat, |
ef8f2327 | 370 | struct mem_cgroup *memcg) |
55779ec7 | 371 | { |
ef8f2327 | 372 | struct mem_cgroup_per_node *mz; |
55779ec7 JW |
373 | struct lruvec *lruvec; |
374 | ||
375 | if (mem_cgroup_disabled()) { | |
a9dd0a83 | 376 | lruvec = node_lruvec(pgdat); |
55779ec7 JW |
377 | goto out; |
378 | } | |
379 | ||
ef8f2327 | 380 | mz = mem_cgroup_nodeinfo(memcg, pgdat->node_id); |
55779ec7 JW |
381 | lruvec = &mz->lruvec; |
382 | out: | |
383 | /* | |
384 | * Since a node can be onlined after the mem_cgroup was created, | |
599d0c95 | 385 | * we have to be prepared to initialize lruvec->pgdat here; |
55779ec7 JW |
386 | * and if offlined then reonlined, we need to reinitialize it. |
387 | */ | |
ef8f2327 MG |
388 | if (unlikely(lruvec->pgdat != pgdat)) |
389 | lruvec->pgdat = pgdat; | |
55779ec7 JW |
390 | return lruvec; |
391 | } | |
392 | ||
599d0c95 | 393 | struct lruvec *mem_cgroup_page_lruvec(struct page *, struct pglist_data *); |
c9b0ed51 | 394 | |
2314b42d | 395 | bool task_in_mem_cgroup(struct task_struct *task, struct mem_cgroup *memcg); |
64219994 | 396 | struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
e993d905 | 397 | |
d46eb14b SB |
398 | struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm); |
399 | ||
f745c6f5 SB |
400 | struct mem_cgroup *get_mem_cgroup_from_page(struct page *page); |
401 | ||
33398cf2 MH |
402 | static inline |
403 | struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){ | |
404 | return css ? container_of(css, struct mem_cgroup, css) : NULL; | |
405 | } | |
406 | ||
dc0b5864 RG |
407 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
408 | { | |
d46eb14b SB |
409 | if (memcg) |
410 | css_put(&memcg->css); | |
dc0b5864 RG |
411 | } |
412 | ||
8e8ae645 JW |
413 | #define mem_cgroup_from_counter(counter, member) \ |
414 | container_of(counter, struct mem_cgroup, member) | |
415 | ||
33398cf2 MH |
416 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
417 | struct mem_cgroup *, | |
418 | struct mem_cgroup_reclaim_cookie *); | |
419 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); | |
7c5f64f8 VD |
420 | int mem_cgroup_scan_tasks(struct mem_cgroup *, |
421 | int (*)(struct task_struct *, void *), void *); | |
33398cf2 | 422 | |
23047a96 JW |
423 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
424 | { | |
425 | if (mem_cgroup_disabled()) | |
426 | return 0; | |
427 | ||
73f576c0 | 428 | return memcg->id.id; |
23047a96 | 429 | } |
73f576c0 | 430 | struct mem_cgroup *mem_cgroup_from_id(unsigned short id); |
23047a96 | 431 | |
2262185c RG |
432 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
433 | { | |
434 | struct mem_cgroup_per_node *mz; | |
435 | ||
436 | if (mem_cgroup_disabled()) | |
437 | return NULL; | |
438 | ||
439 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
440 | return mz->memcg; | |
441 | } | |
442 | ||
8e8ae645 JW |
443 | /** |
444 | * parent_mem_cgroup - find the accounting parent of a memcg | |
445 | * @memcg: memcg whose parent to find | |
446 | * | |
447 | * Returns the parent memcg, or NULL if this is the root or the memory | |
448 | * controller is in legacy no-hierarchy mode. | |
449 | */ | |
450 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) | |
451 | { | |
452 | if (!memcg->memory.parent) | |
453 | return NULL; | |
454 | return mem_cgroup_from_counter(memcg->memory.parent, memory); | |
455 | } | |
456 | ||
33398cf2 MH |
457 | static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, |
458 | struct mem_cgroup *root) | |
459 | { | |
460 | if (root == memcg) | |
461 | return true; | |
462 | if (!root->use_hierarchy) | |
463 | return false; | |
464 | return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup); | |
465 | } | |
e1aab161 | 466 | |
2314b42d JW |
467 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
468 | struct mem_cgroup *memcg) | |
2e4d4091 | 469 | { |
587af308 | 470 | struct mem_cgroup *task_memcg; |
413918bb | 471 | bool match = false; |
c3ac9a8a | 472 | |
2e4d4091 | 473 | rcu_read_lock(); |
587af308 | 474 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
413918bb | 475 | if (task_memcg) |
2314b42d | 476 | match = mem_cgroup_is_descendant(task_memcg, memcg); |
2e4d4091 | 477 | rcu_read_unlock(); |
c3ac9a8a | 478 | return match; |
2e4d4091 | 479 | } |
8a9f3ccd | 480 | |
64219994 | 481 | struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page); |
2fc04524 | 482 | ino_t page_cgroup_ino(struct page *page); |
d324236b | 483 | |
eb01aaab VD |
484 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
485 | { | |
486 | if (mem_cgroup_disabled()) | |
487 | return true; | |
488 | return !!(memcg->css.flags & CSS_ONLINE); | |
489 | } | |
490 | ||
58ae83db KH |
491 | /* |
492 | * For memory reclaim. | |
493 | */ | |
889976db | 494 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
33398cf2 MH |
495 | |
496 | void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, | |
b4536f0c | 497 | int zid, int nr_pages); |
33398cf2 | 498 | |
0a6b76dd VD |
499 | unsigned long mem_cgroup_node_nr_lru_pages(struct mem_cgroup *memcg, |
500 | int nid, unsigned int lru_mask); | |
501 | ||
33398cf2 MH |
502 | static inline |
503 | unsigned long mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru) | |
504 | { | |
ef8f2327 | 505 | struct mem_cgroup_per_node *mz; |
b4536f0c MH |
506 | unsigned long nr_pages = 0; |
507 | int zid; | |
33398cf2 | 508 | |
ef8f2327 | 509 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); |
b4536f0c MH |
510 | for (zid = 0; zid < MAX_NR_ZONES; zid++) |
511 | nr_pages += mz->lru_zone_size[zid][lru]; | |
512 | return nr_pages; | |
513 | } | |
514 | ||
515 | static inline | |
516 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
517 | enum lru_list lru, int zone_idx) | |
518 | { | |
519 | struct mem_cgroup_per_node *mz; | |
520 | ||
521 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
522 | return mz->lru_zone_size[zone_idx][lru]; | |
33398cf2 MH |
523 | } |
524 | ||
b23afb93 TH |
525 | void mem_cgroup_handle_over_high(void); |
526 | ||
bbec2e15 | 527 | unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg); |
7c5f64f8 | 528 | |
f0c867d9 | 529 | void mem_cgroup_print_oom_context(struct mem_cgroup *memcg, |
64219994 | 530 | struct task_struct *p); |
58ae83db | 531 | |
f0c867d9 | 532 | void mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg); |
533 | ||
29ef680a | 534 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 | 535 | { |
29ef680a MH |
536 | WARN_ON(current->in_user_fault); |
537 | current->in_user_fault = 1; | |
519e5247 JW |
538 | } |
539 | ||
29ef680a | 540 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 | 541 | { |
29ef680a MH |
542 | WARN_ON(!current->in_user_fault); |
543 | current->in_user_fault = 0; | |
519e5247 JW |
544 | } |
545 | ||
3812c8c8 JW |
546 | static inline bool task_in_memcg_oom(struct task_struct *p) |
547 | { | |
626ebc41 | 548 | return p->memcg_in_oom; |
3812c8c8 JW |
549 | } |
550 | ||
49426420 | 551 | bool mem_cgroup_oom_synchronize(bool wait); |
3d8b38eb RG |
552 | struct mem_cgroup *mem_cgroup_get_oom_group(struct task_struct *victim, |
553 | struct mem_cgroup *oom_domain); | |
554 | void mem_cgroup_print_oom_group(struct mem_cgroup *memcg); | |
3812c8c8 | 555 | |
c255a458 | 556 | #ifdef CONFIG_MEMCG_SWAP |
c077719b KH |
557 | extern int do_swap_account; |
558 | #endif | |
f8d66542 | 559 | |
739f79fc JW |
560 | struct mem_cgroup *lock_page_memcg(struct page *page); |
561 | void __unlock_page_memcg(struct mem_cgroup *memcg); | |
62cccb8c | 562 | void unlock_page_memcg(struct page *page); |
d7365e78 | 563 | |
04fecbf5 | 564 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
ccda7f43 | 565 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, |
04fecbf5 | 566 | int idx) |
2a2e4885 | 567 | { |
a983b5eb JW |
568 | long x = atomic_long_read(&memcg->stat[idx]); |
569 | #ifdef CONFIG_SMP | |
570 | if (x < 0) | |
571 | x = 0; | |
572 | #endif | |
573 | return x; | |
2a2e4885 JW |
574 | } |
575 | ||
04fecbf5 | 576 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 577 | static inline void __mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 578 | int idx, int val) |
2a2e4885 | 579 | { |
a983b5eb JW |
580 | long x; |
581 | ||
582 | if (mem_cgroup_disabled()) | |
583 | return; | |
584 | ||
585 | x = val + __this_cpu_read(memcg->stat_cpu->count[idx]); | |
586 | if (unlikely(abs(x) > MEMCG_CHARGE_BATCH)) { | |
587 | atomic_long_add(x, &memcg->stat[idx]); | |
588 | x = 0; | |
589 | } | |
590 | __this_cpu_write(memcg->stat_cpu->count[idx], x); | |
2a2e4885 JW |
591 | } |
592 | ||
04fecbf5 | 593 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 594 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 595 | int idx, int val) |
2a2e4885 | 596 | { |
c3cc3911 JW |
597 | unsigned long flags; |
598 | ||
599 | local_irq_save(flags); | |
a983b5eb | 600 | __mod_memcg_state(memcg, idx, val); |
c3cc3911 | 601 | local_irq_restore(flags); |
2a2e4885 JW |
602 | } |
603 | ||
33398cf2 | 604 | /** |
ccda7f43 | 605 | * mod_memcg_page_state - update page state statistics |
62cccb8c | 606 | * @page: the page |
33398cf2 MH |
607 | * @idx: page state item to account |
608 | * @val: number of pages (positive or negative) | |
609 | * | |
fdf1cdb9 JW |
610 | * The @page must be locked or the caller must use lock_page_memcg() |
611 | * to prevent double accounting when the page is concurrently being | |
612 | * moved to another memcg: | |
81f8c3a4 | 613 | * |
fdf1cdb9 | 614 | * lock_page(page) or lock_page_memcg(page) |
81f8c3a4 | 615 | * if (TestClearPageState(page)) |
ccda7f43 | 616 | * mod_memcg_page_state(page, state, -1); |
fdf1cdb9 | 617 | * unlock_page(page) or unlock_page_memcg(page) |
2a2e4885 JW |
618 | * |
619 | * Kernel pages are an exception to this, since they'll never move. | |
33398cf2 | 620 | */ |
00f3ca2c | 621 | static inline void __mod_memcg_page_state(struct page *page, |
04fecbf5 | 622 | int idx, int val) |
00f3ca2c JW |
623 | { |
624 | if (page->mem_cgroup) | |
625 | __mod_memcg_state(page->mem_cgroup, idx, val); | |
626 | } | |
627 | ||
ccda7f43 | 628 | static inline void mod_memcg_page_state(struct page *page, |
04fecbf5 | 629 | int idx, int val) |
33398cf2 | 630 | { |
62cccb8c | 631 | if (page->mem_cgroup) |
ccda7f43 | 632 | mod_memcg_state(page->mem_cgroup, idx, val); |
33398cf2 MH |
633 | } |
634 | ||
00f3ca2c JW |
635 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
636 | enum node_stat_item idx) | |
2a7106f2 | 637 | { |
00f3ca2c | 638 | struct mem_cgroup_per_node *pn; |
a983b5eb | 639 | long x; |
00f3ca2c JW |
640 | |
641 | if (mem_cgroup_disabled()) | |
642 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
643 | ||
644 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
a983b5eb JW |
645 | x = atomic_long_read(&pn->lruvec_stat[idx]); |
646 | #ifdef CONFIG_SMP | |
647 | if (x < 0) | |
648 | x = 0; | |
649 | #endif | |
650 | return x; | |
2a7106f2 GT |
651 | } |
652 | ||
00f3ca2c JW |
653 | static inline void __mod_lruvec_state(struct lruvec *lruvec, |
654 | enum node_stat_item idx, int val) | |
2a7106f2 | 655 | { |
00f3ca2c | 656 | struct mem_cgroup_per_node *pn; |
a983b5eb | 657 | long x; |
00f3ca2c | 658 | |
28454265 | 659 | /* Update node */ |
00f3ca2c | 660 | __mod_node_page_state(lruvec_pgdat(lruvec), idx, val); |
28454265 | 661 | |
00f3ca2c JW |
662 | if (mem_cgroup_disabled()) |
663 | return; | |
28454265 | 664 | |
00f3ca2c | 665 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); |
28454265 JW |
666 | |
667 | /* Update memcg */ | |
00f3ca2c | 668 | __mod_memcg_state(pn->memcg, idx, val); |
28454265 JW |
669 | |
670 | /* Update lruvec */ | |
a983b5eb JW |
671 | x = val + __this_cpu_read(pn->lruvec_stat_cpu->count[idx]); |
672 | if (unlikely(abs(x) > MEMCG_CHARGE_BATCH)) { | |
673 | atomic_long_add(x, &pn->lruvec_stat[idx]); | |
674 | x = 0; | |
675 | } | |
676 | __this_cpu_write(pn->lruvec_stat_cpu->count[idx], x); | |
00f3ca2c JW |
677 | } |
678 | ||
679 | static inline void mod_lruvec_state(struct lruvec *lruvec, | |
680 | enum node_stat_item idx, int val) | |
681 | { | |
c3cc3911 JW |
682 | unsigned long flags; |
683 | ||
684 | local_irq_save(flags); | |
28454265 | 685 | __mod_lruvec_state(lruvec, idx, val); |
c3cc3911 | 686 | local_irq_restore(flags); |
00f3ca2c JW |
687 | } |
688 | ||
689 | static inline void __mod_lruvec_page_state(struct page *page, | |
690 | enum node_stat_item idx, int val) | |
691 | { | |
28454265 JW |
692 | pg_data_t *pgdat = page_pgdat(page); |
693 | struct lruvec *lruvec; | |
00f3ca2c | 694 | |
28454265 JW |
695 | /* Untracked pages have no memcg, no lruvec. Update only the node */ |
696 | if (!page->mem_cgroup) { | |
697 | __mod_node_page_state(pgdat, idx, val); | |
00f3ca2c | 698 | return; |
28454265 JW |
699 | } |
700 | ||
701 | lruvec = mem_cgroup_lruvec(pgdat, page->mem_cgroup); | |
702 | __mod_lruvec_state(lruvec, idx, val); | |
00f3ca2c JW |
703 | } |
704 | ||
705 | static inline void mod_lruvec_page_state(struct page *page, | |
706 | enum node_stat_item idx, int val) | |
707 | { | |
c3cc3911 JW |
708 | unsigned long flags; |
709 | ||
710 | local_irq_save(flags); | |
28454265 | 711 | __mod_lruvec_page_state(page, idx, val); |
c3cc3911 | 712 | local_irq_restore(flags); |
2a7106f2 GT |
713 | } |
714 | ||
ef8f2327 | 715 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
716 | gfp_t gfp_mask, |
717 | unsigned long *total_scanned); | |
a63d83f4 | 718 | |
c9019e9b | 719 | static inline void __count_memcg_events(struct mem_cgroup *memcg, |
e27be240 JW |
720 | enum vm_event_item idx, |
721 | unsigned long count) | |
c9019e9b | 722 | { |
a983b5eb JW |
723 | unsigned long x; |
724 | ||
725 | if (mem_cgroup_disabled()) | |
726 | return; | |
727 | ||
728 | x = count + __this_cpu_read(memcg->stat_cpu->events[idx]); | |
729 | if (unlikely(x > MEMCG_CHARGE_BATCH)) { | |
730 | atomic_long_add(x, &memcg->events[idx]); | |
731 | x = 0; | |
732 | } | |
733 | __this_cpu_write(memcg->stat_cpu->events[idx], x); | |
c9019e9b JW |
734 | } |
735 | ||
2262185c | 736 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
e27be240 JW |
737 | enum vm_event_item idx, |
738 | unsigned long count) | |
2262185c | 739 | { |
c3cc3911 JW |
740 | unsigned long flags; |
741 | ||
742 | local_irq_save(flags); | |
a983b5eb | 743 | __count_memcg_events(memcg, idx, count); |
c3cc3911 | 744 | local_irq_restore(flags); |
2262185c RG |
745 | } |
746 | ||
747 | static inline void count_memcg_page_event(struct page *page, | |
e27be240 | 748 | enum vm_event_item idx) |
2262185c RG |
749 | { |
750 | if (page->mem_cgroup) | |
751 | count_memcg_events(page->mem_cgroup, idx, 1); | |
752 | } | |
753 | ||
754 | static inline void count_memcg_event_mm(struct mm_struct *mm, | |
755 | enum vm_event_item idx) | |
68ae564b | 756 | { |
33398cf2 MH |
757 | struct mem_cgroup *memcg; |
758 | ||
68ae564b DR |
759 | if (mem_cgroup_disabled()) |
760 | return; | |
33398cf2 MH |
761 | |
762 | rcu_read_lock(); | |
763 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
fe6bdfc8 | 764 | if (likely(memcg)) |
c9019e9b | 765 | count_memcg_events(memcg, idx, 1); |
33398cf2 | 766 | rcu_read_unlock(); |
68ae564b | 767 | } |
c9019e9b | 768 | |
e27be240 JW |
769 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
770 | enum memcg_memory_event event) | |
c9019e9b | 771 | { |
e27be240 | 772 | atomic_long_inc(&memcg->memory_events[event]); |
c9019e9b JW |
773 | cgroup_file_notify(&memcg->events_file); |
774 | } | |
775 | ||
fe6bdfc8 RG |
776 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
777 | enum memcg_memory_event event) | |
778 | { | |
779 | struct mem_cgroup *memcg; | |
780 | ||
781 | if (mem_cgroup_disabled()) | |
782 | return; | |
783 | ||
784 | rcu_read_lock(); | |
785 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
786 | if (likely(memcg)) | |
787 | memcg_memory_event(memcg, event); | |
788 | rcu_read_unlock(); | |
789 | } | |
790 | ||
ca3e0214 | 791 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
e94c8a9c | 792 | void mem_cgroup_split_huge_fixup(struct page *head); |
ca3e0214 KH |
793 | #endif |
794 | ||
c255a458 | 795 | #else /* CONFIG_MEMCG */ |
23047a96 JW |
796 | |
797 | #define MEM_CGROUP_ID_SHIFT 0 | |
798 | #define MEM_CGROUP_ID_MAX 0 | |
799 | ||
7a81b88c KH |
800 | struct mem_cgroup; |
801 | ||
dfd2f10c KT |
802 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
803 | { | |
804 | return true; | |
805 | } | |
806 | ||
23047a96 JW |
807 | static inline bool mem_cgroup_disabled(void) |
808 | { | |
809 | return true; | |
810 | } | |
811 | ||
e27be240 JW |
812 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
813 | enum memcg_memory_event event) | |
241994ed JW |
814 | { |
815 | } | |
816 | ||
fe6bdfc8 RG |
817 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
818 | enum memcg_memory_event event) | |
819 | { | |
820 | } | |
821 | ||
bf8d5d52 RG |
822 | static inline enum mem_cgroup_protection mem_cgroup_protected( |
823 | struct mem_cgroup *root, struct mem_cgroup *memcg) | |
241994ed | 824 | { |
bf8d5d52 | 825 | return MEMCG_PROT_NONE; |
241994ed JW |
826 | } |
827 | ||
00501b53 JW |
828 | static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
829 | gfp_t gfp_mask, | |
f627c2f5 KS |
830 | struct mem_cgroup **memcgp, |
831 | bool compound) | |
7a81b88c | 832 | { |
00501b53 | 833 | *memcgp = NULL; |
7a81b88c KH |
834 | return 0; |
835 | } | |
836 | ||
2cf85583 TH |
837 | static inline int mem_cgroup_try_charge_delay(struct page *page, |
838 | struct mm_struct *mm, | |
839 | gfp_t gfp_mask, | |
840 | struct mem_cgroup **memcgp, | |
841 | bool compound) | |
842 | { | |
843 | *memcgp = NULL; | |
844 | return 0; | |
845 | } | |
846 | ||
00501b53 JW |
847 | static inline void mem_cgroup_commit_charge(struct page *page, |
848 | struct mem_cgroup *memcg, | |
f627c2f5 | 849 | bool lrucare, bool compound) |
7a81b88c KH |
850 | { |
851 | } | |
852 | ||
00501b53 | 853 | static inline void mem_cgroup_cancel_charge(struct page *page, |
f627c2f5 KS |
854 | struct mem_cgroup *memcg, |
855 | bool compound) | |
7a81b88c KH |
856 | { |
857 | } | |
858 | ||
0a31bc97 | 859 | static inline void mem_cgroup_uncharge(struct page *page) |
569b846d KH |
860 | { |
861 | } | |
862 | ||
747db954 | 863 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
8a9f3ccd BS |
864 | { |
865 | } | |
866 | ||
6a93ca8f | 867 | static inline void mem_cgroup_migrate(struct page *old, struct page *new) |
69029cd5 KH |
868 | { |
869 | } | |
870 | ||
a9dd0a83 | 871 | static inline struct lruvec *mem_cgroup_lruvec(struct pglist_data *pgdat, |
ef8f2327 | 872 | struct mem_cgroup *memcg) |
08e552c6 | 873 | { |
a9dd0a83 | 874 | return node_lruvec(pgdat); |
08e552c6 KH |
875 | } |
876 | ||
fa9add64 | 877 | static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, |
599d0c95 | 878 | struct pglist_data *pgdat) |
66e1707b | 879 | { |
599d0c95 | 880 | return &pgdat->lruvec; |
66e1707b BS |
881 | } |
882 | ||
587af308 | 883 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
c0ff4b85 | 884 | struct mem_cgroup *memcg) |
bed7161a | 885 | { |
587af308 | 886 | return true; |
bed7161a BS |
887 | } |
888 | ||
ffbdccf5 DR |
889 | static inline bool task_in_mem_cgroup(struct task_struct *task, |
890 | const struct mem_cgroup *memcg) | |
4c4a2214 | 891 | { |
ffbdccf5 | 892 | return true; |
4c4a2214 DR |
893 | } |
894 | ||
d46eb14b SB |
895 | static inline struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm) |
896 | { | |
897 | return NULL; | |
898 | } | |
899 | ||
f745c6f5 SB |
900 | static inline struct mem_cgroup *get_mem_cgroup_from_page(struct page *page) |
901 | { | |
902 | return NULL; | |
903 | } | |
904 | ||
dc0b5864 RG |
905 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
906 | { | |
907 | } | |
908 | ||
5660048c JW |
909 | static inline struct mem_cgroup * |
910 | mem_cgroup_iter(struct mem_cgroup *root, | |
911 | struct mem_cgroup *prev, | |
912 | struct mem_cgroup_reclaim_cookie *reclaim) | |
913 | { | |
914 | return NULL; | |
915 | } | |
916 | ||
917 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
918 | struct mem_cgroup *prev) | |
919 | { | |
920 | } | |
921 | ||
7c5f64f8 VD |
922 | static inline int mem_cgroup_scan_tasks(struct mem_cgroup *memcg, |
923 | int (*fn)(struct task_struct *, void *), void *arg) | |
924 | { | |
925 | return 0; | |
926 | } | |
927 | ||
23047a96 | 928 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
f8d66542 | 929 | { |
23047a96 JW |
930 | return 0; |
931 | } | |
932 | ||
933 | static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id) | |
934 | { | |
935 | WARN_ON_ONCE(id); | |
936 | /* XXX: This should always return root_mem_cgroup */ | |
937 | return NULL; | |
f8d66542 | 938 | } |
a636b327 | 939 | |
2262185c RG |
940 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
941 | { | |
942 | return NULL; | |
943 | } | |
944 | ||
eb01aaab | 945 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
14797e23 | 946 | { |
13308ca9 | 947 | return true; |
14797e23 KM |
948 | } |
949 | ||
a3d8e054 | 950 | static inline unsigned long |
4d7dcca2 | 951 | mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru) |
a3d8e054 KM |
952 | { |
953 | return 0; | |
954 | } | |
b4536f0c MH |
955 | static inline |
956 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
957 | enum lru_list lru, int zone_idx) | |
958 | { | |
959 | return 0; | |
960 | } | |
a3d8e054 | 961 | |
0a6b76dd VD |
962 | static inline unsigned long |
963 | mem_cgroup_node_nr_lru_pages(struct mem_cgroup *memcg, | |
964 | int nid, unsigned int lru_mask) | |
965 | { | |
966 | return 0; | |
967 | } | |
968 | ||
bbec2e15 | 969 | static inline unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg) |
7c5f64f8 VD |
970 | { |
971 | return 0; | |
972 | } | |
973 | ||
e222432b | 974 | static inline void |
f0c867d9 | 975 | mem_cgroup_print_oom_context(struct mem_cgroup *memcg, struct task_struct *p) |
976 | { | |
977 | } | |
978 | ||
979 | static inline void | |
980 | mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg) | |
e222432b BS |
981 | { |
982 | } | |
983 | ||
739f79fc JW |
984 | static inline struct mem_cgroup *lock_page_memcg(struct page *page) |
985 | { | |
986 | return NULL; | |
987 | } | |
988 | ||
989 | static inline void __unlock_page_memcg(struct mem_cgroup *memcg) | |
89c06bd5 KH |
990 | { |
991 | } | |
992 | ||
62cccb8c | 993 | static inline void unlock_page_memcg(struct page *page) |
89c06bd5 KH |
994 | { |
995 | } | |
996 | ||
b23afb93 TH |
997 | static inline void mem_cgroup_handle_over_high(void) |
998 | { | |
999 | } | |
1000 | ||
29ef680a | 1001 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 JW |
1002 | { |
1003 | } | |
1004 | ||
29ef680a | 1005 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 JW |
1006 | { |
1007 | } | |
1008 | ||
3812c8c8 JW |
1009 | static inline bool task_in_memcg_oom(struct task_struct *p) |
1010 | { | |
1011 | return false; | |
1012 | } | |
1013 | ||
49426420 | 1014 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
3812c8c8 JW |
1015 | { |
1016 | return false; | |
1017 | } | |
1018 | ||
3d8b38eb RG |
1019 | static inline struct mem_cgroup *mem_cgroup_get_oom_group( |
1020 | struct task_struct *victim, struct mem_cgroup *oom_domain) | |
1021 | { | |
1022 | return NULL; | |
1023 | } | |
1024 | ||
1025 | static inline void mem_cgroup_print_oom_group(struct mem_cgroup *memcg) | |
1026 | { | |
1027 | } | |
1028 | ||
ccda7f43 | 1029 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, |
04fecbf5 | 1030 | int idx) |
2a2e4885 JW |
1031 | { |
1032 | return 0; | |
1033 | } | |
1034 | ||
00f3ca2c | 1035 | static inline void __mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1036 | int idx, |
00f3ca2c | 1037 | int nr) |
2a2e4885 JW |
1038 | { |
1039 | } | |
1040 | ||
00f3ca2c | 1041 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1042 | int idx, |
00f3ca2c | 1043 | int nr) |
2a2e4885 JW |
1044 | { |
1045 | } | |
1046 | ||
00f3ca2c | 1047 | static inline void __mod_memcg_page_state(struct page *page, |
04fecbf5 | 1048 | int idx, |
00f3ca2c | 1049 | int nr) |
2a2e4885 JW |
1050 | { |
1051 | } | |
1052 | ||
ccda7f43 | 1053 | static inline void mod_memcg_page_state(struct page *page, |
04fecbf5 | 1054 | int idx, |
ccda7f43 | 1055 | int nr) |
553af430 JW |
1056 | { |
1057 | } | |
1058 | ||
00f3ca2c JW |
1059 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
1060 | enum node_stat_item idx) | |
2a7106f2 | 1061 | { |
00f3ca2c | 1062 | return node_page_state(lruvec_pgdat(lruvec), idx); |
2a7106f2 GT |
1063 | } |
1064 | ||
00f3ca2c JW |
1065 | static inline void __mod_lruvec_state(struct lruvec *lruvec, |
1066 | enum node_stat_item idx, int val) | |
d69b042f | 1067 | { |
00f3ca2c JW |
1068 | __mod_node_page_state(lruvec_pgdat(lruvec), idx, val); |
1069 | } | |
1070 | ||
1071 | static inline void mod_lruvec_state(struct lruvec *lruvec, | |
1072 | enum node_stat_item idx, int val) | |
1073 | { | |
1074 | mod_node_page_state(lruvec_pgdat(lruvec), idx, val); | |
1075 | } | |
1076 | ||
1077 | static inline void __mod_lruvec_page_state(struct page *page, | |
1078 | enum node_stat_item idx, int val) | |
1079 | { | |
1080 | __mod_node_page_state(page_pgdat(page), idx, val); | |
1081 | } | |
1082 | ||
1083 | static inline void mod_lruvec_page_state(struct page *page, | |
1084 | enum node_stat_item idx, int val) | |
1085 | { | |
1086 | mod_node_page_state(page_pgdat(page), idx, val); | |
d69b042f BS |
1087 | } |
1088 | ||
4e416953 | 1089 | static inline |
ef8f2327 | 1090 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
1091 | gfp_t gfp_mask, |
1092 | unsigned long *total_scanned) | |
4e416953 | 1093 | { |
0608f43d | 1094 | return 0; |
4e416953 BS |
1095 | } |
1096 | ||
e94c8a9c | 1097 | static inline void mem_cgroup_split_huge_fixup(struct page *head) |
ca3e0214 KH |
1098 | { |
1099 | } | |
1100 | ||
2262185c RG |
1101 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
1102 | enum vm_event_item idx, | |
1103 | unsigned long count) | |
1104 | { | |
1105 | } | |
1106 | ||
1107 | static inline void count_memcg_page_event(struct page *page, | |
04fecbf5 | 1108 | int idx) |
2262185c RG |
1109 | { |
1110 | } | |
1111 | ||
456f998e | 1112 | static inline |
2262185c | 1113 | void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx) |
456f998e YH |
1114 | { |
1115 | } | |
c255a458 | 1116 | #endif /* CONFIG_MEMCG */ |
78fb7466 | 1117 | |
04fecbf5 | 1118 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1119 | static inline void __inc_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1120 | int idx) |
00f3ca2c JW |
1121 | { |
1122 | __mod_memcg_state(memcg, idx, 1); | |
1123 | } | |
1124 | ||
04fecbf5 | 1125 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1126 | static inline void __dec_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1127 | int idx) |
00f3ca2c JW |
1128 | { |
1129 | __mod_memcg_state(memcg, idx, -1); | |
1130 | } | |
1131 | ||
04fecbf5 | 1132 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1133 | static inline void __inc_memcg_page_state(struct page *page, |
04fecbf5 | 1134 | int idx) |
00f3ca2c JW |
1135 | { |
1136 | __mod_memcg_page_state(page, idx, 1); | |
1137 | } | |
1138 | ||
04fecbf5 | 1139 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1140 | static inline void __dec_memcg_page_state(struct page *page, |
04fecbf5 | 1141 | int idx) |
00f3ca2c JW |
1142 | { |
1143 | __mod_memcg_page_state(page, idx, -1); | |
1144 | } | |
1145 | ||
1146 | static inline void __inc_lruvec_state(struct lruvec *lruvec, | |
1147 | enum node_stat_item idx) | |
1148 | { | |
1149 | __mod_lruvec_state(lruvec, idx, 1); | |
1150 | } | |
1151 | ||
1152 | static inline void __dec_lruvec_state(struct lruvec *lruvec, | |
1153 | enum node_stat_item idx) | |
1154 | { | |
1155 | __mod_lruvec_state(lruvec, idx, -1); | |
1156 | } | |
1157 | ||
1158 | static inline void __inc_lruvec_page_state(struct page *page, | |
1159 | enum node_stat_item idx) | |
1160 | { | |
1161 | __mod_lruvec_page_state(page, idx, 1); | |
1162 | } | |
1163 | ||
1164 | static inline void __dec_lruvec_page_state(struct page *page, | |
1165 | enum node_stat_item idx) | |
1166 | { | |
1167 | __mod_lruvec_page_state(page, idx, -1); | |
1168 | } | |
1169 | ||
04fecbf5 | 1170 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1171 | static inline void inc_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1172 | int idx) |
00f3ca2c JW |
1173 | { |
1174 | mod_memcg_state(memcg, idx, 1); | |
1175 | } | |
1176 | ||
04fecbf5 | 1177 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1178 | static inline void dec_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1179 | int idx) |
00f3ca2c JW |
1180 | { |
1181 | mod_memcg_state(memcg, idx, -1); | |
1182 | } | |
1183 | ||
04fecbf5 | 1184 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1185 | static inline void inc_memcg_page_state(struct page *page, |
04fecbf5 | 1186 | int idx) |
00f3ca2c JW |
1187 | { |
1188 | mod_memcg_page_state(page, idx, 1); | |
1189 | } | |
1190 | ||
04fecbf5 | 1191 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1192 | static inline void dec_memcg_page_state(struct page *page, |
04fecbf5 | 1193 | int idx) |
00f3ca2c JW |
1194 | { |
1195 | mod_memcg_page_state(page, idx, -1); | |
1196 | } | |
1197 | ||
1198 | static inline void inc_lruvec_state(struct lruvec *lruvec, | |
1199 | enum node_stat_item idx) | |
1200 | { | |
1201 | mod_lruvec_state(lruvec, idx, 1); | |
1202 | } | |
1203 | ||
1204 | static inline void dec_lruvec_state(struct lruvec *lruvec, | |
1205 | enum node_stat_item idx) | |
1206 | { | |
1207 | mod_lruvec_state(lruvec, idx, -1); | |
1208 | } | |
1209 | ||
1210 | static inline void inc_lruvec_page_state(struct page *page, | |
1211 | enum node_stat_item idx) | |
1212 | { | |
1213 | mod_lruvec_page_state(page, idx, 1); | |
1214 | } | |
1215 | ||
1216 | static inline void dec_lruvec_page_state(struct page *page, | |
1217 | enum node_stat_item idx) | |
1218 | { | |
1219 | mod_lruvec_page_state(page, idx, -1); | |
1220 | } | |
1221 | ||
52ebea74 | 1222 | #ifdef CONFIG_CGROUP_WRITEBACK |
841710aa | 1223 | |
841710aa | 1224 | struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb); |
c5edf9cd TH |
1225 | void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages, |
1226 | unsigned long *pheadroom, unsigned long *pdirty, | |
1227 | unsigned long *pwriteback); | |
841710aa TH |
1228 | |
1229 | #else /* CONFIG_CGROUP_WRITEBACK */ | |
1230 | ||
1231 | static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb) | |
1232 | { | |
1233 | return NULL; | |
1234 | } | |
1235 | ||
c2aa723a | 1236 | static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb, |
c5edf9cd TH |
1237 | unsigned long *pfilepages, |
1238 | unsigned long *pheadroom, | |
c2aa723a TH |
1239 | unsigned long *pdirty, |
1240 | unsigned long *pwriteback) | |
1241 | { | |
1242 | } | |
1243 | ||
841710aa | 1244 | #endif /* CONFIG_CGROUP_WRITEBACK */ |
52ebea74 | 1245 | |
e1aab161 | 1246 | struct sock; |
baac50bb JW |
1247 | bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); |
1248 | void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); | |
d886f4e4 | 1249 | #ifdef CONFIG_MEMCG |
ef12947c JW |
1250 | extern struct static_key_false memcg_sockets_enabled_key; |
1251 | #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key) | |
2d758073 JW |
1252 | void mem_cgroup_sk_alloc(struct sock *sk); |
1253 | void mem_cgroup_sk_free(struct sock *sk); | |
baac50bb | 1254 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c | 1255 | { |
0db15298 | 1256 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && memcg->tcpmem_pressure) |
8e8ae645 | 1257 | return true; |
8e8ae645 JW |
1258 | do { |
1259 | if (time_before(jiffies, memcg->socket_pressure)) | |
1260 | return true; | |
1261 | } while ((memcg = parent_mem_cgroup(memcg))); | |
1262 | return false; | |
e805605c JW |
1263 | } |
1264 | #else | |
80e95fe0 | 1265 | #define mem_cgroup_sockets_enabled 0 |
2d758073 JW |
1266 | static inline void mem_cgroup_sk_alloc(struct sock *sk) { }; |
1267 | static inline void mem_cgroup_sk_free(struct sock *sk) { }; | |
baac50bb | 1268 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c JW |
1269 | { |
1270 | return false; | |
1271 | } | |
1272 | #endif | |
7ae1e1d0 | 1273 | |
45264778 VD |
1274 | struct kmem_cache *memcg_kmem_get_cache(struct kmem_cache *cachep); |
1275 | void memcg_kmem_put_cache(struct kmem_cache *cachep); | |
1276 | int memcg_kmem_charge_memcg(struct page *page, gfp_t gfp, int order, | |
1277 | struct mem_cgroup *memcg); | |
9b6f7e16 RG |
1278 | |
1279 | #ifdef CONFIG_MEMCG_KMEM | |
45264778 VD |
1280 | int memcg_kmem_charge(struct page *page, gfp_t gfp, int order); |
1281 | void memcg_kmem_uncharge(struct page *page, int order); | |
1282 | ||
ef12947c | 1283 | extern struct static_key_false memcg_kmem_enabled_key; |
17cc4dfe | 1284 | extern struct workqueue_struct *memcg_kmem_cache_wq; |
749c5415 | 1285 | |
dbcf73e2 | 1286 | extern int memcg_nr_cache_ids; |
64219994 MH |
1287 | void memcg_get_cache_ids(void); |
1288 | void memcg_put_cache_ids(void); | |
ebe945c2 GC |
1289 | |
1290 | /* | |
1291 | * Helper macro to loop through all memcg-specific caches. Callers must still | |
1292 | * check if the cache is valid (it is either valid or NULL). | |
1293 | * the slab_mutex must be held when looping through those caches | |
1294 | */ | |
749c5415 | 1295 | #define for_each_memcg_cache_index(_idx) \ |
dbcf73e2 | 1296 | for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++) |
749c5415 | 1297 | |
7ae1e1d0 GC |
1298 | static inline bool memcg_kmem_enabled(void) |
1299 | { | |
ef12947c | 1300 | return static_branch_unlikely(&memcg_kmem_enabled_key); |
7ae1e1d0 GC |
1301 | } |
1302 | ||
33398cf2 | 1303 | /* |
9f706d68 | 1304 | * helper for accessing a memcg's index. It will be used as an index in the |
33398cf2 MH |
1305 | * child cache array in kmem_cache, and also to derive its name. This function |
1306 | * will return -1 when this is not a kmem-limited memcg. | |
1307 | */ | |
1308 | static inline int memcg_cache_id(struct mem_cgroup *memcg) | |
1309 | { | |
1310 | return memcg ? memcg->kmemcg_id : -1; | |
1311 | } | |
5722d094 | 1312 | |
0a4465d3 KT |
1313 | extern int memcg_expand_shrinker_maps(int new_id); |
1314 | ||
fae91d6d KT |
1315 | extern void memcg_set_shrinker_bit(struct mem_cgroup *memcg, |
1316 | int nid, int shrinker_id); | |
7ae1e1d0 | 1317 | #else |
9b6f7e16 RG |
1318 | |
1319 | static inline int memcg_kmem_charge(struct page *page, gfp_t gfp, int order) | |
1320 | { | |
1321 | return 0; | |
1322 | } | |
1323 | ||
1324 | static inline void memcg_kmem_uncharge(struct page *page, int order) | |
1325 | { | |
1326 | } | |
1327 | ||
749c5415 GC |
1328 | #define for_each_memcg_cache_index(_idx) \ |
1329 | for (; NULL; ) | |
1330 | ||
b9ce5ef4 GC |
1331 | static inline bool memcg_kmem_enabled(void) |
1332 | { | |
1333 | return false; | |
1334 | } | |
1335 | ||
2633d7a0 GC |
1336 | static inline int memcg_cache_id(struct mem_cgroup *memcg) |
1337 | { | |
1338 | return -1; | |
1339 | } | |
1340 | ||
05257a1a VD |
1341 | static inline void memcg_get_cache_ids(void) |
1342 | { | |
1343 | } | |
1344 | ||
1345 | static inline void memcg_put_cache_ids(void) | |
1346 | { | |
1347 | } | |
1348 | ||
fae91d6d KT |
1349 | static inline void memcg_set_shrinker_bit(struct mem_cgroup *memcg, |
1350 | int nid, int shrinker_id) { } | |
84c07d11 | 1351 | #endif /* CONFIG_MEMCG_KMEM */ |
127424c8 | 1352 | |
8cdea7c0 | 1353 | #endif /* _LINUX_MEMCONTROL_H */ |