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8cdea7c0 BS |
1 | /* memcontrol.h - Memory Controller |
2 | * | |
3 | * Copyright IBM Corporation, 2007 | |
4 | * Author Balbir Singh <balbir@linux.vnet.ibm.com> | |
5 | * | |
78fb7466 PE |
6 | * Copyright 2007 OpenVZ SWsoft Inc |
7 | * Author: Pavel Emelianov <xemul@openvz.org> | |
8 | * | |
8cdea7c0 BS |
9 | * This program is free software; you can redistribute it and/or modify |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | */ | |
19 | ||
20 | #ifndef _LINUX_MEMCONTROL_H | |
21 | #define _LINUX_MEMCONTROL_H | |
f8d66542 | 22 | #include <linux/cgroup.h> |
456f998e | 23 | #include <linux/vm_event_item.h> |
7ae1e1d0 | 24 | #include <linux/hardirq.h> |
a8964b9b | 25 | #include <linux/jump_label.h> |
33398cf2 MH |
26 | #include <linux/page_counter.h> |
27 | #include <linux/vmpressure.h> | |
28 | #include <linux/eventfd.h> | |
00f3ca2c JW |
29 | #include <linux/mm.h> |
30 | #include <linux/vmstat.h> | |
33398cf2 | 31 | #include <linux/writeback.h> |
fdf1cdb9 | 32 | #include <linux/page-flags.h> |
456f998e | 33 | |
78fb7466 | 34 | struct mem_cgroup; |
8697d331 BS |
35 | struct page; |
36 | struct mm_struct; | |
2633d7a0 | 37 | struct kmem_cache; |
78fb7466 | 38 | |
71cd3113 JW |
39 | /* Cgroup-specific page state, on top of universal node page state */ |
40 | enum memcg_stat_item { | |
41 | MEMCG_CACHE = NR_VM_NODE_STAT_ITEMS, | |
42 | MEMCG_RSS, | |
43 | MEMCG_RSS_HUGE, | |
44 | MEMCG_SWAP, | |
45 | MEMCG_SOCK, | |
46 | /* XXX: why are these zone and not node counters? */ | |
47 | MEMCG_KERNEL_STACK_KB, | |
b2807f07 | 48 | MEMCG_NR_STAT, |
2a7106f2 GT |
49 | }; |
50 | ||
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; | |
81 | atomic_t ref; | |
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 | ||
228 | /* protected by memcg_oom_lock */ | |
229 | bool oom_lock; | |
230 | int under_oom; | |
231 | ||
232 | int swappiness; | |
233 | /* OOM-Killer disable */ | |
234 | int oom_kill_disable; | |
235 | ||
e27be240 | 236 | /* memory.events */ |
472912a2 TH |
237 | struct cgroup_file events_file; |
238 | ||
f3a53a3a TH |
239 | /* handle for "memory.swap.events" */ |
240 | struct cgroup_file swap_events_file; | |
241 | ||
33398cf2 MH |
242 | /* protect arrays of thresholds */ |
243 | struct mutex thresholds_lock; | |
244 | ||
245 | /* thresholds for memory usage. RCU-protected */ | |
246 | struct mem_cgroup_thresholds thresholds; | |
247 | ||
248 | /* thresholds for mem+swap usage. RCU-protected */ | |
249 | struct mem_cgroup_thresholds memsw_thresholds; | |
250 | ||
251 | /* For oom notifier event fd */ | |
252 | struct list_head oom_notify; | |
253 | ||
254 | /* | |
255 | * Should we move charges of a task when a task is moved into this | |
256 | * mem_cgroup ? And what type of charges should we move ? | |
257 | */ | |
258 | unsigned long move_charge_at_immigrate; | |
e81bf979 AL |
259 | /* taken only while moving_account > 0 */ |
260 | spinlock_t move_lock; | |
261 | unsigned long move_lock_flags; | |
262 | ||
263 | MEMCG_PADDING(_pad1_); | |
264 | ||
33398cf2 MH |
265 | /* |
266 | * set > 0 if pages under this cgroup are moving to other cgroup. | |
267 | */ | |
268 | atomic_t moving_account; | |
33398cf2 | 269 | struct task_struct *move_lock_task; |
a983b5eb | 270 | |
e27be240 | 271 | /* memory.stat */ |
a983b5eb | 272 | struct mem_cgroup_stat_cpu __percpu *stat_cpu; |
e81bf979 AL |
273 | |
274 | MEMCG_PADDING(_pad2_); | |
275 | ||
a983b5eb | 276 | atomic_long_t stat[MEMCG_NR_STAT]; |
e27be240 | 277 | atomic_long_t events[NR_VM_EVENT_ITEMS]; |
e81bf979 | 278 | atomic_long_t memory_events[MEMCG_NR_MEMORY_EVENTS]; |
33398cf2 | 279 | |
d886f4e4 JW |
280 | unsigned long socket_pressure; |
281 | ||
282 | /* Legacy tcp memory accounting */ | |
0db15298 JW |
283 | bool tcpmem_active; |
284 | int tcpmem_pressure; | |
d886f4e4 | 285 | |
84c07d11 | 286 | #ifdef CONFIG_MEMCG_KMEM |
33398cf2 MH |
287 | /* Index in the kmem_cache->memcg_params.memcg_caches array */ |
288 | int kmemcg_id; | |
567e9ab2 | 289 | enum memcg_kmem_state kmem_state; |
bc2791f8 | 290 | struct list_head kmem_caches; |
33398cf2 MH |
291 | #endif |
292 | ||
293 | int last_scanned_node; | |
294 | #if MAX_NUMNODES > 1 | |
295 | nodemask_t scan_nodes; | |
296 | atomic_t numainfo_events; | |
297 | atomic_t numainfo_updating; | |
298 | #endif | |
299 | ||
300 | #ifdef CONFIG_CGROUP_WRITEBACK | |
301 | struct list_head cgwb_list; | |
302 | struct wb_domain cgwb_domain; | |
303 | #endif | |
304 | ||
305 | /* List of events which userspace want to receive */ | |
306 | struct list_head event_list; | |
307 | spinlock_t event_list_lock; | |
308 | ||
309 | struct mem_cgroup_per_node *nodeinfo[0]; | |
310 | /* WARNING: nodeinfo must be the last member here */ | |
311 | }; | |
7d828602 | 312 | |
a983b5eb JW |
313 | /* |
314 | * size of first charge trial. "32" comes from vmscan.c's magic value. | |
315 | * TODO: maybe necessary to use big numbers in big irons. | |
316 | */ | |
317 | #define MEMCG_CHARGE_BATCH 32U | |
318 | ||
7d828602 | 319 | extern struct mem_cgroup *root_mem_cgroup; |
56161634 | 320 | |
dfd2f10c KT |
321 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
322 | { | |
323 | return (memcg == root_mem_cgroup); | |
324 | } | |
325 | ||
23047a96 JW |
326 | static inline bool mem_cgroup_disabled(void) |
327 | { | |
328 | return !cgroup_subsys_enabled(memory_cgrp_subsys); | |
329 | } | |
330 | ||
bf8d5d52 RG |
331 | enum mem_cgroup_protection mem_cgroup_protected(struct mem_cgroup *root, |
332 | struct mem_cgroup *memcg); | |
241994ed | 333 | |
00501b53 | 334 | int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
f627c2f5 KS |
335 | gfp_t gfp_mask, struct mem_cgroup **memcgp, |
336 | bool compound); | |
2cf85583 TH |
337 | int mem_cgroup_try_charge_delay(struct page *page, struct mm_struct *mm, |
338 | gfp_t gfp_mask, struct mem_cgroup **memcgp, | |
339 | bool compound); | |
00501b53 | 340 | void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg, |
f627c2f5 KS |
341 | bool lrucare, bool compound); |
342 | void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg, | |
343 | bool compound); | |
0a31bc97 | 344 | void mem_cgroup_uncharge(struct page *page); |
747db954 | 345 | void mem_cgroup_uncharge_list(struct list_head *page_list); |
569b846d | 346 | |
6a93ca8f | 347 | void mem_cgroup_migrate(struct page *oldpage, struct page *newpage); |
569b846d | 348 | |
ef8f2327 MG |
349 | static struct mem_cgroup_per_node * |
350 | mem_cgroup_nodeinfo(struct mem_cgroup *memcg, int nid) | |
55779ec7 | 351 | { |
ef8f2327 | 352 | return memcg->nodeinfo[nid]; |
55779ec7 JW |
353 | } |
354 | ||
355 | /** | |
a9dd0a83 MG |
356 | * mem_cgroup_lruvec - get the lru list vector for a node or a memcg zone |
357 | * @node: node of the wanted lruvec | |
55779ec7 JW |
358 | * @memcg: memcg of the wanted lruvec |
359 | * | |
a9dd0a83 MG |
360 | * Returns the lru list vector holding pages for a given @node or a given |
361 | * @memcg and @zone. This can be the node lruvec, if the memory controller | |
55779ec7 JW |
362 | * is disabled. |
363 | */ | |
a9dd0a83 | 364 | static inline struct lruvec *mem_cgroup_lruvec(struct pglist_data *pgdat, |
ef8f2327 | 365 | struct mem_cgroup *memcg) |
55779ec7 | 366 | { |
ef8f2327 | 367 | struct mem_cgroup_per_node *mz; |
55779ec7 JW |
368 | struct lruvec *lruvec; |
369 | ||
370 | if (mem_cgroup_disabled()) { | |
a9dd0a83 | 371 | lruvec = node_lruvec(pgdat); |
55779ec7 JW |
372 | goto out; |
373 | } | |
374 | ||
ef8f2327 | 375 | mz = mem_cgroup_nodeinfo(memcg, pgdat->node_id); |
55779ec7 JW |
376 | lruvec = &mz->lruvec; |
377 | out: | |
378 | /* | |
379 | * Since a node can be onlined after the mem_cgroup was created, | |
599d0c95 | 380 | * we have to be prepared to initialize lruvec->pgdat here; |
55779ec7 JW |
381 | * and if offlined then reonlined, we need to reinitialize it. |
382 | */ | |
ef8f2327 MG |
383 | if (unlikely(lruvec->pgdat != pgdat)) |
384 | lruvec->pgdat = pgdat; | |
55779ec7 JW |
385 | return lruvec; |
386 | } | |
387 | ||
599d0c95 | 388 | struct lruvec *mem_cgroup_page_lruvec(struct page *, struct pglist_data *); |
c9b0ed51 | 389 | |
2314b42d | 390 | bool task_in_mem_cgroup(struct task_struct *task, struct mem_cgroup *memcg); |
64219994 | 391 | struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
e993d905 | 392 | |
d46eb14b SB |
393 | struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm); |
394 | ||
f745c6f5 SB |
395 | struct mem_cgroup *get_mem_cgroup_from_page(struct page *page); |
396 | ||
33398cf2 MH |
397 | static inline |
398 | struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){ | |
399 | return css ? container_of(css, struct mem_cgroup, css) : NULL; | |
400 | } | |
401 | ||
dc0b5864 RG |
402 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
403 | { | |
d46eb14b SB |
404 | if (memcg) |
405 | css_put(&memcg->css); | |
dc0b5864 RG |
406 | } |
407 | ||
8e8ae645 JW |
408 | #define mem_cgroup_from_counter(counter, member) \ |
409 | container_of(counter, struct mem_cgroup, member) | |
410 | ||
33398cf2 MH |
411 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
412 | struct mem_cgroup *, | |
413 | struct mem_cgroup_reclaim_cookie *); | |
414 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); | |
7c5f64f8 VD |
415 | int mem_cgroup_scan_tasks(struct mem_cgroup *, |
416 | int (*)(struct task_struct *, void *), void *); | |
33398cf2 | 417 | |
23047a96 JW |
418 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
419 | { | |
420 | if (mem_cgroup_disabled()) | |
421 | return 0; | |
422 | ||
73f576c0 | 423 | return memcg->id.id; |
23047a96 | 424 | } |
73f576c0 | 425 | struct mem_cgroup *mem_cgroup_from_id(unsigned short id); |
23047a96 | 426 | |
2262185c RG |
427 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
428 | { | |
429 | struct mem_cgroup_per_node *mz; | |
430 | ||
431 | if (mem_cgroup_disabled()) | |
432 | return NULL; | |
433 | ||
434 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
435 | return mz->memcg; | |
436 | } | |
437 | ||
8e8ae645 JW |
438 | /** |
439 | * parent_mem_cgroup - find the accounting parent of a memcg | |
440 | * @memcg: memcg whose parent to find | |
441 | * | |
442 | * Returns the parent memcg, or NULL if this is the root or the memory | |
443 | * controller is in legacy no-hierarchy mode. | |
444 | */ | |
445 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) | |
446 | { | |
447 | if (!memcg->memory.parent) | |
448 | return NULL; | |
449 | return mem_cgroup_from_counter(memcg->memory.parent, memory); | |
450 | } | |
451 | ||
33398cf2 MH |
452 | static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, |
453 | struct mem_cgroup *root) | |
454 | { | |
455 | if (root == memcg) | |
456 | return true; | |
457 | if (!root->use_hierarchy) | |
458 | return false; | |
459 | return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup); | |
460 | } | |
e1aab161 | 461 | |
2314b42d JW |
462 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
463 | struct mem_cgroup *memcg) | |
2e4d4091 | 464 | { |
587af308 | 465 | struct mem_cgroup *task_memcg; |
413918bb | 466 | bool match = false; |
c3ac9a8a | 467 | |
2e4d4091 | 468 | rcu_read_lock(); |
587af308 | 469 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
413918bb | 470 | if (task_memcg) |
2314b42d | 471 | match = mem_cgroup_is_descendant(task_memcg, memcg); |
2e4d4091 | 472 | rcu_read_unlock(); |
c3ac9a8a | 473 | return match; |
2e4d4091 | 474 | } |
8a9f3ccd | 475 | |
64219994 | 476 | struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page); |
2fc04524 | 477 | ino_t page_cgroup_ino(struct page *page); |
d324236b | 478 | |
eb01aaab VD |
479 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
480 | { | |
481 | if (mem_cgroup_disabled()) | |
482 | return true; | |
483 | return !!(memcg->css.flags & CSS_ONLINE); | |
484 | } | |
485 | ||
58ae83db KH |
486 | /* |
487 | * For memory reclaim. | |
488 | */ | |
889976db | 489 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
33398cf2 MH |
490 | |
491 | void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, | |
b4536f0c | 492 | int zid, int nr_pages); |
33398cf2 | 493 | |
0a6b76dd VD |
494 | unsigned long mem_cgroup_node_nr_lru_pages(struct mem_cgroup *memcg, |
495 | int nid, unsigned int lru_mask); | |
496 | ||
33398cf2 MH |
497 | static inline |
498 | unsigned long mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru) | |
499 | { | |
ef8f2327 | 500 | struct mem_cgroup_per_node *mz; |
b4536f0c MH |
501 | unsigned long nr_pages = 0; |
502 | int zid; | |
33398cf2 | 503 | |
ef8f2327 | 504 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); |
b4536f0c MH |
505 | for (zid = 0; zid < MAX_NR_ZONES; zid++) |
506 | nr_pages += mz->lru_zone_size[zid][lru]; | |
507 | return nr_pages; | |
508 | } | |
509 | ||
510 | static inline | |
511 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
512 | enum lru_list lru, int zone_idx) | |
513 | { | |
514 | struct mem_cgroup_per_node *mz; | |
515 | ||
516 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
517 | return mz->lru_zone_size[zone_idx][lru]; | |
33398cf2 MH |
518 | } |
519 | ||
b23afb93 TH |
520 | void mem_cgroup_handle_over_high(void); |
521 | ||
bbec2e15 | 522 | unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg); |
7c5f64f8 | 523 | |
64219994 MH |
524 | void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, |
525 | struct task_struct *p); | |
58ae83db | 526 | |
29ef680a | 527 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 | 528 | { |
29ef680a MH |
529 | WARN_ON(current->in_user_fault); |
530 | current->in_user_fault = 1; | |
519e5247 JW |
531 | } |
532 | ||
29ef680a | 533 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 | 534 | { |
29ef680a MH |
535 | WARN_ON(!current->in_user_fault); |
536 | current->in_user_fault = 0; | |
519e5247 JW |
537 | } |
538 | ||
3812c8c8 JW |
539 | static inline bool task_in_memcg_oom(struct task_struct *p) |
540 | { | |
626ebc41 | 541 | return p->memcg_in_oom; |
3812c8c8 JW |
542 | } |
543 | ||
49426420 | 544 | bool mem_cgroup_oom_synchronize(bool wait); |
3812c8c8 | 545 | |
c255a458 | 546 | #ifdef CONFIG_MEMCG_SWAP |
c077719b KH |
547 | extern int do_swap_account; |
548 | #endif | |
f8d66542 | 549 | |
739f79fc JW |
550 | struct mem_cgroup *lock_page_memcg(struct page *page); |
551 | void __unlock_page_memcg(struct mem_cgroup *memcg); | |
62cccb8c | 552 | void unlock_page_memcg(struct page *page); |
d7365e78 | 553 | |
04fecbf5 | 554 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
ccda7f43 | 555 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, |
04fecbf5 | 556 | int idx) |
2a2e4885 | 557 | { |
a983b5eb JW |
558 | long x = atomic_long_read(&memcg->stat[idx]); |
559 | #ifdef CONFIG_SMP | |
560 | if (x < 0) | |
561 | x = 0; | |
562 | #endif | |
563 | return x; | |
2a2e4885 JW |
564 | } |
565 | ||
04fecbf5 | 566 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 567 | static inline void __mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 568 | int idx, int val) |
2a2e4885 | 569 | { |
a983b5eb JW |
570 | long x; |
571 | ||
572 | if (mem_cgroup_disabled()) | |
573 | return; | |
574 | ||
575 | x = val + __this_cpu_read(memcg->stat_cpu->count[idx]); | |
576 | if (unlikely(abs(x) > MEMCG_CHARGE_BATCH)) { | |
577 | atomic_long_add(x, &memcg->stat[idx]); | |
578 | x = 0; | |
579 | } | |
580 | __this_cpu_write(memcg->stat_cpu->count[idx], x); | |
2a2e4885 JW |
581 | } |
582 | ||
04fecbf5 | 583 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 584 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 585 | int idx, int val) |
2a2e4885 | 586 | { |
c3cc3911 JW |
587 | unsigned long flags; |
588 | ||
589 | local_irq_save(flags); | |
a983b5eb | 590 | __mod_memcg_state(memcg, idx, val); |
c3cc3911 | 591 | local_irq_restore(flags); |
2a2e4885 JW |
592 | } |
593 | ||
33398cf2 | 594 | /** |
ccda7f43 | 595 | * mod_memcg_page_state - update page state statistics |
62cccb8c | 596 | * @page: the page |
33398cf2 MH |
597 | * @idx: page state item to account |
598 | * @val: number of pages (positive or negative) | |
599 | * | |
fdf1cdb9 JW |
600 | * The @page must be locked or the caller must use lock_page_memcg() |
601 | * to prevent double accounting when the page is concurrently being | |
602 | * moved to another memcg: | |
81f8c3a4 | 603 | * |
fdf1cdb9 | 604 | * lock_page(page) or lock_page_memcg(page) |
81f8c3a4 | 605 | * if (TestClearPageState(page)) |
ccda7f43 | 606 | * mod_memcg_page_state(page, state, -1); |
fdf1cdb9 | 607 | * unlock_page(page) or unlock_page_memcg(page) |
2a2e4885 JW |
608 | * |
609 | * Kernel pages are an exception to this, since they'll never move. | |
33398cf2 | 610 | */ |
00f3ca2c | 611 | static inline void __mod_memcg_page_state(struct page *page, |
04fecbf5 | 612 | int idx, int val) |
00f3ca2c JW |
613 | { |
614 | if (page->mem_cgroup) | |
615 | __mod_memcg_state(page->mem_cgroup, idx, val); | |
616 | } | |
617 | ||
ccda7f43 | 618 | static inline void mod_memcg_page_state(struct page *page, |
04fecbf5 | 619 | int idx, int val) |
33398cf2 | 620 | { |
62cccb8c | 621 | if (page->mem_cgroup) |
ccda7f43 | 622 | mod_memcg_state(page->mem_cgroup, idx, val); |
33398cf2 MH |
623 | } |
624 | ||
00f3ca2c JW |
625 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
626 | enum node_stat_item idx) | |
2a7106f2 | 627 | { |
00f3ca2c | 628 | struct mem_cgroup_per_node *pn; |
a983b5eb | 629 | long x; |
00f3ca2c JW |
630 | |
631 | if (mem_cgroup_disabled()) | |
632 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
633 | ||
634 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
a983b5eb JW |
635 | x = atomic_long_read(&pn->lruvec_stat[idx]); |
636 | #ifdef CONFIG_SMP | |
637 | if (x < 0) | |
638 | x = 0; | |
639 | #endif | |
640 | return x; | |
2a7106f2 GT |
641 | } |
642 | ||
00f3ca2c JW |
643 | static inline void __mod_lruvec_state(struct lruvec *lruvec, |
644 | enum node_stat_item idx, int val) | |
2a7106f2 | 645 | { |
00f3ca2c | 646 | struct mem_cgroup_per_node *pn; |
a983b5eb | 647 | long x; |
00f3ca2c | 648 | |
28454265 | 649 | /* Update node */ |
00f3ca2c | 650 | __mod_node_page_state(lruvec_pgdat(lruvec), idx, val); |
28454265 | 651 | |
00f3ca2c JW |
652 | if (mem_cgroup_disabled()) |
653 | return; | |
28454265 | 654 | |
00f3ca2c | 655 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); |
28454265 JW |
656 | |
657 | /* Update memcg */ | |
00f3ca2c | 658 | __mod_memcg_state(pn->memcg, idx, val); |
28454265 JW |
659 | |
660 | /* Update lruvec */ | |
a983b5eb JW |
661 | x = val + __this_cpu_read(pn->lruvec_stat_cpu->count[idx]); |
662 | if (unlikely(abs(x) > MEMCG_CHARGE_BATCH)) { | |
663 | atomic_long_add(x, &pn->lruvec_stat[idx]); | |
664 | x = 0; | |
665 | } | |
666 | __this_cpu_write(pn->lruvec_stat_cpu->count[idx], x); | |
00f3ca2c JW |
667 | } |
668 | ||
669 | static inline void mod_lruvec_state(struct lruvec *lruvec, | |
670 | enum node_stat_item idx, int val) | |
671 | { | |
c3cc3911 JW |
672 | unsigned long flags; |
673 | ||
674 | local_irq_save(flags); | |
28454265 | 675 | __mod_lruvec_state(lruvec, idx, val); |
c3cc3911 | 676 | local_irq_restore(flags); |
00f3ca2c JW |
677 | } |
678 | ||
679 | static inline void __mod_lruvec_page_state(struct page *page, | |
680 | enum node_stat_item idx, int val) | |
681 | { | |
28454265 JW |
682 | pg_data_t *pgdat = page_pgdat(page); |
683 | struct lruvec *lruvec; | |
00f3ca2c | 684 | |
28454265 JW |
685 | /* Untracked pages have no memcg, no lruvec. Update only the node */ |
686 | if (!page->mem_cgroup) { | |
687 | __mod_node_page_state(pgdat, idx, val); | |
00f3ca2c | 688 | return; |
28454265 JW |
689 | } |
690 | ||
691 | lruvec = mem_cgroup_lruvec(pgdat, page->mem_cgroup); | |
692 | __mod_lruvec_state(lruvec, idx, val); | |
00f3ca2c JW |
693 | } |
694 | ||
695 | static inline void mod_lruvec_page_state(struct page *page, | |
696 | enum node_stat_item idx, int val) | |
697 | { | |
c3cc3911 JW |
698 | unsigned long flags; |
699 | ||
700 | local_irq_save(flags); | |
28454265 | 701 | __mod_lruvec_page_state(page, idx, val); |
c3cc3911 | 702 | local_irq_restore(flags); |
2a7106f2 GT |
703 | } |
704 | ||
ef8f2327 | 705 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
706 | gfp_t gfp_mask, |
707 | unsigned long *total_scanned); | |
a63d83f4 | 708 | |
c9019e9b | 709 | static inline void __count_memcg_events(struct mem_cgroup *memcg, |
e27be240 JW |
710 | enum vm_event_item idx, |
711 | unsigned long count) | |
c9019e9b | 712 | { |
a983b5eb JW |
713 | unsigned long x; |
714 | ||
715 | if (mem_cgroup_disabled()) | |
716 | return; | |
717 | ||
718 | x = count + __this_cpu_read(memcg->stat_cpu->events[idx]); | |
719 | if (unlikely(x > MEMCG_CHARGE_BATCH)) { | |
720 | atomic_long_add(x, &memcg->events[idx]); | |
721 | x = 0; | |
722 | } | |
723 | __this_cpu_write(memcg->stat_cpu->events[idx], x); | |
c9019e9b JW |
724 | } |
725 | ||
2262185c | 726 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
e27be240 JW |
727 | enum vm_event_item idx, |
728 | unsigned long count) | |
2262185c | 729 | { |
c3cc3911 JW |
730 | unsigned long flags; |
731 | ||
732 | local_irq_save(flags); | |
a983b5eb | 733 | __count_memcg_events(memcg, idx, count); |
c3cc3911 | 734 | local_irq_restore(flags); |
2262185c RG |
735 | } |
736 | ||
737 | static inline void count_memcg_page_event(struct page *page, | |
e27be240 | 738 | enum vm_event_item idx) |
2262185c RG |
739 | { |
740 | if (page->mem_cgroup) | |
741 | count_memcg_events(page->mem_cgroup, idx, 1); | |
742 | } | |
743 | ||
744 | static inline void count_memcg_event_mm(struct mm_struct *mm, | |
745 | enum vm_event_item idx) | |
68ae564b | 746 | { |
33398cf2 MH |
747 | struct mem_cgroup *memcg; |
748 | ||
68ae564b DR |
749 | if (mem_cgroup_disabled()) |
750 | return; | |
33398cf2 MH |
751 | |
752 | rcu_read_lock(); | |
753 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
fe6bdfc8 | 754 | if (likely(memcg)) |
c9019e9b | 755 | count_memcg_events(memcg, idx, 1); |
33398cf2 | 756 | rcu_read_unlock(); |
68ae564b | 757 | } |
c9019e9b | 758 | |
e27be240 JW |
759 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
760 | enum memcg_memory_event event) | |
c9019e9b | 761 | { |
e27be240 | 762 | atomic_long_inc(&memcg->memory_events[event]); |
c9019e9b JW |
763 | cgroup_file_notify(&memcg->events_file); |
764 | } | |
765 | ||
fe6bdfc8 RG |
766 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
767 | enum memcg_memory_event event) | |
768 | { | |
769 | struct mem_cgroup *memcg; | |
770 | ||
771 | if (mem_cgroup_disabled()) | |
772 | return; | |
773 | ||
774 | rcu_read_lock(); | |
775 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
776 | if (likely(memcg)) | |
777 | memcg_memory_event(memcg, event); | |
778 | rcu_read_unlock(); | |
779 | } | |
780 | ||
ca3e0214 | 781 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
e94c8a9c | 782 | void mem_cgroup_split_huge_fixup(struct page *head); |
ca3e0214 KH |
783 | #endif |
784 | ||
c255a458 | 785 | #else /* CONFIG_MEMCG */ |
23047a96 JW |
786 | |
787 | #define MEM_CGROUP_ID_SHIFT 0 | |
788 | #define MEM_CGROUP_ID_MAX 0 | |
789 | ||
7a81b88c KH |
790 | struct mem_cgroup; |
791 | ||
dfd2f10c KT |
792 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
793 | { | |
794 | return true; | |
795 | } | |
796 | ||
23047a96 JW |
797 | static inline bool mem_cgroup_disabled(void) |
798 | { | |
799 | return true; | |
800 | } | |
801 | ||
e27be240 JW |
802 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
803 | enum memcg_memory_event event) | |
241994ed JW |
804 | { |
805 | } | |
806 | ||
fe6bdfc8 RG |
807 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
808 | enum memcg_memory_event event) | |
809 | { | |
810 | } | |
811 | ||
bf8d5d52 RG |
812 | static inline enum mem_cgroup_protection mem_cgroup_protected( |
813 | struct mem_cgroup *root, struct mem_cgroup *memcg) | |
241994ed | 814 | { |
bf8d5d52 | 815 | return MEMCG_PROT_NONE; |
241994ed JW |
816 | } |
817 | ||
00501b53 JW |
818 | static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
819 | gfp_t gfp_mask, | |
f627c2f5 KS |
820 | struct mem_cgroup **memcgp, |
821 | bool compound) | |
7a81b88c | 822 | { |
00501b53 | 823 | *memcgp = NULL; |
7a81b88c KH |
824 | return 0; |
825 | } | |
826 | ||
2cf85583 TH |
827 | static inline int mem_cgroup_try_charge_delay(struct page *page, |
828 | struct mm_struct *mm, | |
829 | gfp_t gfp_mask, | |
830 | struct mem_cgroup **memcgp, | |
831 | bool compound) | |
832 | { | |
833 | *memcgp = NULL; | |
834 | return 0; | |
835 | } | |
836 | ||
00501b53 JW |
837 | static inline void mem_cgroup_commit_charge(struct page *page, |
838 | struct mem_cgroup *memcg, | |
f627c2f5 | 839 | bool lrucare, bool compound) |
7a81b88c KH |
840 | { |
841 | } | |
842 | ||
00501b53 | 843 | static inline void mem_cgroup_cancel_charge(struct page *page, |
f627c2f5 KS |
844 | struct mem_cgroup *memcg, |
845 | bool compound) | |
7a81b88c KH |
846 | { |
847 | } | |
848 | ||
0a31bc97 | 849 | static inline void mem_cgroup_uncharge(struct page *page) |
569b846d KH |
850 | { |
851 | } | |
852 | ||
747db954 | 853 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
8a9f3ccd BS |
854 | { |
855 | } | |
856 | ||
6a93ca8f | 857 | static inline void mem_cgroup_migrate(struct page *old, struct page *new) |
69029cd5 KH |
858 | { |
859 | } | |
860 | ||
a9dd0a83 | 861 | static inline struct lruvec *mem_cgroup_lruvec(struct pglist_data *pgdat, |
ef8f2327 | 862 | struct mem_cgroup *memcg) |
08e552c6 | 863 | { |
a9dd0a83 | 864 | return node_lruvec(pgdat); |
08e552c6 KH |
865 | } |
866 | ||
fa9add64 | 867 | static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, |
599d0c95 | 868 | struct pglist_data *pgdat) |
66e1707b | 869 | { |
599d0c95 | 870 | return &pgdat->lruvec; |
66e1707b BS |
871 | } |
872 | ||
587af308 | 873 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
c0ff4b85 | 874 | struct mem_cgroup *memcg) |
bed7161a | 875 | { |
587af308 | 876 | return true; |
bed7161a BS |
877 | } |
878 | ||
ffbdccf5 DR |
879 | static inline bool task_in_mem_cgroup(struct task_struct *task, |
880 | const struct mem_cgroup *memcg) | |
4c4a2214 | 881 | { |
ffbdccf5 | 882 | return true; |
4c4a2214 DR |
883 | } |
884 | ||
d46eb14b SB |
885 | static inline struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm) |
886 | { | |
887 | return NULL; | |
888 | } | |
889 | ||
f745c6f5 SB |
890 | static inline struct mem_cgroup *get_mem_cgroup_from_page(struct page *page) |
891 | { | |
892 | return NULL; | |
893 | } | |
894 | ||
dc0b5864 RG |
895 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
896 | { | |
897 | } | |
898 | ||
5660048c JW |
899 | static inline struct mem_cgroup * |
900 | mem_cgroup_iter(struct mem_cgroup *root, | |
901 | struct mem_cgroup *prev, | |
902 | struct mem_cgroup_reclaim_cookie *reclaim) | |
903 | { | |
904 | return NULL; | |
905 | } | |
906 | ||
907 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
908 | struct mem_cgroup *prev) | |
909 | { | |
910 | } | |
911 | ||
7c5f64f8 VD |
912 | static inline int mem_cgroup_scan_tasks(struct mem_cgroup *memcg, |
913 | int (*fn)(struct task_struct *, void *), void *arg) | |
914 | { | |
915 | return 0; | |
916 | } | |
917 | ||
23047a96 | 918 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
f8d66542 | 919 | { |
23047a96 JW |
920 | return 0; |
921 | } | |
922 | ||
923 | static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id) | |
924 | { | |
925 | WARN_ON_ONCE(id); | |
926 | /* XXX: This should always return root_mem_cgroup */ | |
927 | return NULL; | |
f8d66542 | 928 | } |
a636b327 | 929 | |
2262185c RG |
930 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
931 | { | |
932 | return NULL; | |
933 | } | |
934 | ||
eb01aaab | 935 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
14797e23 | 936 | { |
13308ca9 | 937 | return true; |
14797e23 KM |
938 | } |
939 | ||
a3d8e054 | 940 | static inline unsigned long |
4d7dcca2 | 941 | mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru) |
a3d8e054 KM |
942 | { |
943 | return 0; | |
944 | } | |
b4536f0c MH |
945 | static inline |
946 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
947 | enum lru_list lru, int zone_idx) | |
948 | { | |
949 | return 0; | |
950 | } | |
a3d8e054 | 951 | |
0a6b76dd VD |
952 | static inline unsigned long |
953 | mem_cgroup_node_nr_lru_pages(struct mem_cgroup *memcg, | |
954 | int nid, unsigned int lru_mask) | |
955 | { | |
956 | return 0; | |
957 | } | |
958 | ||
bbec2e15 | 959 | static inline unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg) |
7c5f64f8 VD |
960 | { |
961 | return 0; | |
962 | } | |
963 | ||
e222432b BS |
964 | static inline void |
965 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) | |
966 | { | |
967 | } | |
968 | ||
739f79fc JW |
969 | static inline struct mem_cgroup *lock_page_memcg(struct page *page) |
970 | { | |
971 | return NULL; | |
972 | } | |
973 | ||
974 | static inline void __unlock_page_memcg(struct mem_cgroup *memcg) | |
89c06bd5 KH |
975 | { |
976 | } | |
977 | ||
62cccb8c | 978 | static inline void unlock_page_memcg(struct page *page) |
89c06bd5 KH |
979 | { |
980 | } | |
981 | ||
b23afb93 TH |
982 | static inline void mem_cgroup_handle_over_high(void) |
983 | { | |
984 | } | |
985 | ||
29ef680a | 986 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 JW |
987 | { |
988 | } | |
989 | ||
29ef680a | 990 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 JW |
991 | { |
992 | } | |
993 | ||
3812c8c8 JW |
994 | static inline bool task_in_memcg_oom(struct task_struct *p) |
995 | { | |
996 | return false; | |
997 | } | |
998 | ||
49426420 | 999 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
3812c8c8 JW |
1000 | { |
1001 | return false; | |
1002 | } | |
1003 | ||
ccda7f43 | 1004 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, |
04fecbf5 | 1005 | int idx) |
2a2e4885 JW |
1006 | { |
1007 | return 0; | |
1008 | } | |
1009 | ||
00f3ca2c | 1010 | static inline void __mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1011 | int idx, |
00f3ca2c | 1012 | int nr) |
2a2e4885 JW |
1013 | { |
1014 | } | |
1015 | ||
00f3ca2c | 1016 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1017 | int idx, |
00f3ca2c | 1018 | int nr) |
2a2e4885 JW |
1019 | { |
1020 | } | |
1021 | ||
00f3ca2c | 1022 | static inline void __mod_memcg_page_state(struct page *page, |
04fecbf5 | 1023 | int idx, |
00f3ca2c | 1024 | int nr) |
2a2e4885 JW |
1025 | { |
1026 | } | |
1027 | ||
ccda7f43 | 1028 | static inline void mod_memcg_page_state(struct page *page, |
04fecbf5 | 1029 | int idx, |
ccda7f43 | 1030 | int nr) |
553af430 JW |
1031 | { |
1032 | } | |
1033 | ||
00f3ca2c JW |
1034 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
1035 | enum node_stat_item idx) | |
2a7106f2 | 1036 | { |
00f3ca2c | 1037 | return node_page_state(lruvec_pgdat(lruvec), idx); |
2a7106f2 GT |
1038 | } |
1039 | ||
00f3ca2c JW |
1040 | static inline void __mod_lruvec_state(struct lruvec *lruvec, |
1041 | enum node_stat_item idx, int val) | |
d69b042f | 1042 | { |
00f3ca2c JW |
1043 | __mod_node_page_state(lruvec_pgdat(lruvec), idx, val); |
1044 | } | |
1045 | ||
1046 | static inline void mod_lruvec_state(struct lruvec *lruvec, | |
1047 | enum node_stat_item idx, int val) | |
1048 | { | |
1049 | mod_node_page_state(lruvec_pgdat(lruvec), idx, val); | |
1050 | } | |
1051 | ||
1052 | static inline void __mod_lruvec_page_state(struct page *page, | |
1053 | enum node_stat_item idx, int val) | |
1054 | { | |
1055 | __mod_node_page_state(page_pgdat(page), idx, val); | |
1056 | } | |
1057 | ||
1058 | static inline void mod_lruvec_page_state(struct page *page, | |
1059 | enum node_stat_item idx, int val) | |
1060 | { | |
1061 | mod_node_page_state(page_pgdat(page), idx, val); | |
d69b042f BS |
1062 | } |
1063 | ||
4e416953 | 1064 | static inline |
ef8f2327 | 1065 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
1066 | gfp_t gfp_mask, |
1067 | unsigned long *total_scanned) | |
4e416953 | 1068 | { |
0608f43d | 1069 | return 0; |
4e416953 BS |
1070 | } |
1071 | ||
e94c8a9c | 1072 | static inline void mem_cgroup_split_huge_fixup(struct page *head) |
ca3e0214 KH |
1073 | { |
1074 | } | |
1075 | ||
2262185c RG |
1076 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
1077 | enum vm_event_item idx, | |
1078 | unsigned long count) | |
1079 | { | |
1080 | } | |
1081 | ||
1082 | static inline void count_memcg_page_event(struct page *page, | |
04fecbf5 | 1083 | int idx) |
2262185c RG |
1084 | { |
1085 | } | |
1086 | ||
456f998e | 1087 | static inline |
2262185c | 1088 | void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx) |
456f998e YH |
1089 | { |
1090 | } | |
c255a458 | 1091 | #endif /* CONFIG_MEMCG */ |
78fb7466 | 1092 | |
04fecbf5 | 1093 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1094 | static inline void __inc_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1095 | int idx) |
00f3ca2c JW |
1096 | { |
1097 | __mod_memcg_state(memcg, idx, 1); | |
1098 | } | |
1099 | ||
04fecbf5 | 1100 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1101 | static inline void __dec_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1102 | int idx) |
00f3ca2c JW |
1103 | { |
1104 | __mod_memcg_state(memcg, idx, -1); | |
1105 | } | |
1106 | ||
04fecbf5 | 1107 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1108 | static inline void __inc_memcg_page_state(struct page *page, |
04fecbf5 | 1109 | int idx) |
00f3ca2c JW |
1110 | { |
1111 | __mod_memcg_page_state(page, idx, 1); | |
1112 | } | |
1113 | ||
04fecbf5 | 1114 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1115 | static inline void __dec_memcg_page_state(struct page *page, |
04fecbf5 | 1116 | int idx) |
00f3ca2c JW |
1117 | { |
1118 | __mod_memcg_page_state(page, idx, -1); | |
1119 | } | |
1120 | ||
1121 | static inline void __inc_lruvec_state(struct lruvec *lruvec, | |
1122 | enum node_stat_item idx) | |
1123 | { | |
1124 | __mod_lruvec_state(lruvec, idx, 1); | |
1125 | } | |
1126 | ||
1127 | static inline void __dec_lruvec_state(struct lruvec *lruvec, | |
1128 | enum node_stat_item idx) | |
1129 | { | |
1130 | __mod_lruvec_state(lruvec, idx, -1); | |
1131 | } | |
1132 | ||
1133 | static inline void __inc_lruvec_page_state(struct page *page, | |
1134 | enum node_stat_item idx) | |
1135 | { | |
1136 | __mod_lruvec_page_state(page, idx, 1); | |
1137 | } | |
1138 | ||
1139 | static inline void __dec_lruvec_page_state(struct page *page, | |
1140 | enum node_stat_item idx) | |
1141 | { | |
1142 | __mod_lruvec_page_state(page, idx, -1); | |
1143 | } | |
1144 | ||
04fecbf5 | 1145 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1146 | static inline void inc_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1147 | int idx) |
00f3ca2c JW |
1148 | { |
1149 | mod_memcg_state(memcg, idx, 1); | |
1150 | } | |
1151 | ||
04fecbf5 | 1152 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1153 | static inline void dec_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1154 | int idx) |
00f3ca2c JW |
1155 | { |
1156 | mod_memcg_state(memcg, idx, -1); | |
1157 | } | |
1158 | ||
04fecbf5 | 1159 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1160 | static inline void inc_memcg_page_state(struct page *page, |
04fecbf5 | 1161 | int idx) |
00f3ca2c JW |
1162 | { |
1163 | mod_memcg_page_state(page, idx, 1); | |
1164 | } | |
1165 | ||
04fecbf5 | 1166 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1167 | static inline void dec_memcg_page_state(struct page *page, |
04fecbf5 | 1168 | int idx) |
00f3ca2c JW |
1169 | { |
1170 | mod_memcg_page_state(page, idx, -1); | |
1171 | } | |
1172 | ||
1173 | static inline void inc_lruvec_state(struct lruvec *lruvec, | |
1174 | enum node_stat_item idx) | |
1175 | { | |
1176 | mod_lruvec_state(lruvec, idx, 1); | |
1177 | } | |
1178 | ||
1179 | static inline void dec_lruvec_state(struct lruvec *lruvec, | |
1180 | enum node_stat_item idx) | |
1181 | { | |
1182 | mod_lruvec_state(lruvec, idx, -1); | |
1183 | } | |
1184 | ||
1185 | static inline void inc_lruvec_page_state(struct page *page, | |
1186 | enum node_stat_item idx) | |
1187 | { | |
1188 | mod_lruvec_page_state(page, idx, 1); | |
1189 | } | |
1190 | ||
1191 | static inline void dec_lruvec_page_state(struct page *page, | |
1192 | enum node_stat_item idx) | |
1193 | { | |
1194 | mod_lruvec_page_state(page, idx, -1); | |
1195 | } | |
1196 | ||
52ebea74 | 1197 | #ifdef CONFIG_CGROUP_WRITEBACK |
841710aa | 1198 | |
841710aa | 1199 | struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb); |
c5edf9cd TH |
1200 | void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages, |
1201 | unsigned long *pheadroom, unsigned long *pdirty, | |
1202 | unsigned long *pwriteback); | |
841710aa TH |
1203 | |
1204 | #else /* CONFIG_CGROUP_WRITEBACK */ | |
1205 | ||
1206 | static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb) | |
1207 | { | |
1208 | return NULL; | |
1209 | } | |
1210 | ||
c2aa723a | 1211 | static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb, |
c5edf9cd TH |
1212 | unsigned long *pfilepages, |
1213 | unsigned long *pheadroom, | |
c2aa723a TH |
1214 | unsigned long *pdirty, |
1215 | unsigned long *pwriteback) | |
1216 | { | |
1217 | } | |
1218 | ||
841710aa | 1219 | #endif /* CONFIG_CGROUP_WRITEBACK */ |
52ebea74 | 1220 | |
e1aab161 | 1221 | struct sock; |
baac50bb JW |
1222 | bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); |
1223 | void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); | |
d886f4e4 | 1224 | #ifdef CONFIG_MEMCG |
ef12947c JW |
1225 | extern struct static_key_false memcg_sockets_enabled_key; |
1226 | #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key) | |
2d758073 JW |
1227 | void mem_cgroup_sk_alloc(struct sock *sk); |
1228 | void mem_cgroup_sk_free(struct sock *sk); | |
baac50bb | 1229 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c | 1230 | { |
0db15298 | 1231 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && memcg->tcpmem_pressure) |
8e8ae645 | 1232 | return true; |
8e8ae645 JW |
1233 | do { |
1234 | if (time_before(jiffies, memcg->socket_pressure)) | |
1235 | return true; | |
1236 | } while ((memcg = parent_mem_cgroup(memcg))); | |
1237 | return false; | |
e805605c JW |
1238 | } |
1239 | #else | |
80e95fe0 | 1240 | #define mem_cgroup_sockets_enabled 0 |
2d758073 JW |
1241 | static inline void mem_cgroup_sk_alloc(struct sock *sk) { }; |
1242 | static inline void mem_cgroup_sk_free(struct sock *sk) { }; | |
baac50bb | 1243 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c JW |
1244 | { |
1245 | return false; | |
1246 | } | |
1247 | #endif | |
7ae1e1d0 | 1248 | |
45264778 VD |
1249 | struct kmem_cache *memcg_kmem_get_cache(struct kmem_cache *cachep); |
1250 | void memcg_kmem_put_cache(struct kmem_cache *cachep); | |
1251 | int memcg_kmem_charge_memcg(struct page *page, gfp_t gfp, int order, | |
1252 | struct mem_cgroup *memcg); | |
1253 | int memcg_kmem_charge(struct page *page, gfp_t gfp, int order); | |
1254 | void memcg_kmem_uncharge(struct page *page, int order); | |
1255 | ||
84c07d11 | 1256 | #ifdef CONFIG_MEMCG_KMEM |
ef12947c | 1257 | extern struct static_key_false memcg_kmem_enabled_key; |
17cc4dfe | 1258 | extern struct workqueue_struct *memcg_kmem_cache_wq; |
749c5415 | 1259 | |
dbcf73e2 | 1260 | extern int memcg_nr_cache_ids; |
64219994 MH |
1261 | void memcg_get_cache_ids(void); |
1262 | void memcg_put_cache_ids(void); | |
ebe945c2 GC |
1263 | |
1264 | /* | |
1265 | * Helper macro to loop through all memcg-specific caches. Callers must still | |
1266 | * check if the cache is valid (it is either valid or NULL). | |
1267 | * the slab_mutex must be held when looping through those caches | |
1268 | */ | |
749c5415 | 1269 | #define for_each_memcg_cache_index(_idx) \ |
dbcf73e2 | 1270 | for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++) |
749c5415 | 1271 | |
7ae1e1d0 GC |
1272 | static inline bool memcg_kmem_enabled(void) |
1273 | { | |
ef12947c | 1274 | return static_branch_unlikely(&memcg_kmem_enabled_key); |
7ae1e1d0 GC |
1275 | } |
1276 | ||
33398cf2 | 1277 | /* |
9f706d68 | 1278 | * helper for accessing a memcg's index. It will be used as an index in the |
33398cf2 MH |
1279 | * child cache array in kmem_cache, and also to derive its name. This function |
1280 | * will return -1 when this is not a kmem-limited memcg. | |
1281 | */ | |
1282 | static inline int memcg_cache_id(struct mem_cgroup *memcg) | |
1283 | { | |
1284 | return memcg ? memcg->kmemcg_id : -1; | |
1285 | } | |
5722d094 | 1286 | |
0a4465d3 KT |
1287 | extern int memcg_expand_shrinker_maps(int new_id); |
1288 | ||
7ae1e1d0 | 1289 | #else |
749c5415 GC |
1290 | #define for_each_memcg_cache_index(_idx) \ |
1291 | for (; NULL; ) | |
1292 | ||
b9ce5ef4 GC |
1293 | static inline bool memcg_kmem_enabled(void) |
1294 | { | |
1295 | return false; | |
1296 | } | |
1297 | ||
2633d7a0 GC |
1298 | static inline int memcg_cache_id(struct mem_cgroup *memcg) |
1299 | { | |
1300 | return -1; | |
1301 | } | |
1302 | ||
05257a1a VD |
1303 | static inline void memcg_get_cache_ids(void) |
1304 | { | |
1305 | } | |
1306 | ||
1307 | static inline void memcg_put_cache_ids(void) | |
1308 | { | |
1309 | } | |
1310 | ||
84c07d11 | 1311 | #endif /* CONFIG_MEMCG_KMEM */ |
127424c8 | 1312 | |
8cdea7c0 | 1313 | #endif /* _LINUX_MEMCONTROL_H */ |