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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; | |
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 | ||
871789d4 CD |
97 | struct memcg_vmstats_percpu { |
98 | long stat[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 */ |
871789d4 | 277 | struct memcg_vmstats_percpu __percpu *vmstats_percpu; |
e81bf979 AL |
278 | |
279 | MEMCG_PADDING(_pad2_); | |
280 | ||
871789d4 CD |
281 | atomic_long_t vmstats[MEMCG_NR_STAT]; |
282 | atomic_long_t vmevents[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 | |
aa9694bb CD |
432 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
433 | { | |
434 | return mem_cgroup_from_css(seq_css(m)); | |
435 | } | |
436 | ||
2262185c RG |
437 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
438 | { | |
439 | struct mem_cgroup_per_node *mz; | |
440 | ||
441 | if (mem_cgroup_disabled()) | |
442 | return NULL; | |
443 | ||
444 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
445 | return mz->memcg; | |
446 | } | |
447 | ||
8e8ae645 JW |
448 | /** |
449 | * parent_mem_cgroup - find the accounting parent of a memcg | |
450 | * @memcg: memcg whose parent to find | |
451 | * | |
452 | * Returns the parent memcg, or NULL if this is the root or the memory | |
453 | * controller is in legacy no-hierarchy mode. | |
454 | */ | |
455 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) | |
456 | { | |
457 | if (!memcg->memory.parent) | |
458 | return NULL; | |
459 | return mem_cgroup_from_counter(memcg->memory.parent, memory); | |
460 | } | |
461 | ||
33398cf2 MH |
462 | static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, |
463 | struct mem_cgroup *root) | |
464 | { | |
465 | if (root == memcg) | |
466 | return true; | |
467 | if (!root->use_hierarchy) | |
468 | return false; | |
469 | return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup); | |
470 | } | |
e1aab161 | 471 | |
2314b42d JW |
472 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
473 | struct mem_cgroup *memcg) | |
2e4d4091 | 474 | { |
587af308 | 475 | struct mem_cgroup *task_memcg; |
413918bb | 476 | bool match = false; |
c3ac9a8a | 477 | |
2e4d4091 | 478 | rcu_read_lock(); |
587af308 | 479 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
413918bb | 480 | if (task_memcg) |
2314b42d | 481 | match = mem_cgroup_is_descendant(task_memcg, memcg); |
2e4d4091 | 482 | rcu_read_unlock(); |
c3ac9a8a | 483 | return match; |
2e4d4091 | 484 | } |
8a9f3ccd | 485 | |
64219994 | 486 | struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page); |
2fc04524 | 487 | ino_t page_cgroup_ino(struct page *page); |
d324236b | 488 | |
eb01aaab VD |
489 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
490 | { | |
491 | if (mem_cgroup_disabled()) | |
492 | return true; | |
493 | return !!(memcg->css.flags & CSS_ONLINE); | |
494 | } | |
495 | ||
58ae83db KH |
496 | /* |
497 | * For memory reclaim. | |
498 | */ | |
889976db | 499 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
33398cf2 MH |
500 | |
501 | void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, | |
b4536f0c | 502 | int zid, int nr_pages); |
33398cf2 | 503 | |
b4536f0c MH |
504 | static inline |
505 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
506 | enum lru_list lru, int zone_idx) | |
507 | { | |
508 | struct mem_cgroup_per_node *mz; | |
509 | ||
510 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
511 | return mz->lru_zone_size[zone_idx][lru]; | |
33398cf2 MH |
512 | } |
513 | ||
b23afb93 TH |
514 | void mem_cgroup_handle_over_high(void); |
515 | ||
bbec2e15 | 516 | unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg); |
7c5f64f8 | 517 | |
f0c867d9 | 518 | void mem_cgroup_print_oom_context(struct mem_cgroup *memcg, |
64219994 | 519 | struct task_struct *p); |
58ae83db | 520 | |
f0c867d9 | 521 | void mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg); |
522 | ||
29ef680a | 523 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 | 524 | { |
29ef680a MH |
525 | WARN_ON(current->in_user_fault); |
526 | current->in_user_fault = 1; | |
519e5247 JW |
527 | } |
528 | ||
29ef680a | 529 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 | 530 | { |
29ef680a MH |
531 | WARN_ON(!current->in_user_fault); |
532 | current->in_user_fault = 0; | |
519e5247 JW |
533 | } |
534 | ||
3812c8c8 JW |
535 | static inline bool task_in_memcg_oom(struct task_struct *p) |
536 | { | |
626ebc41 | 537 | return p->memcg_in_oom; |
3812c8c8 JW |
538 | } |
539 | ||
49426420 | 540 | bool mem_cgroup_oom_synchronize(bool wait); |
3d8b38eb RG |
541 | struct mem_cgroup *mem_cgroup_get_oom_group(struct task_struct *victim, |
542 | struct mem_cgroup *oom_domain); | |
543 | void mem_cgroup_print_oom_group(struct mem_cgroup *memcg); | |
3812c8c8 | 544 | |
c255a458 | 545 | #ifdef CONFIG_MEMCG_SWAP |
c077719b KH |
546 | extern int do_swap_account; |
547 | #endif | |
f8d66542 | 548 | |
739f79fc JW |
549 | struct mem_cgroup *lock_page_memcg(struct page *page); |
550 | void __unlock_page_memcg(struct mem_cgroup *memcg); | |
62cccb8c | 551 | void unlock_page_memcg(struct page *page); |
d7365e78 | 552 | |
0b3d6e6f GT |
553 | /* |
554 | * idx can be of type enum memcg_stat_item or node_stat_item. | |
555 | * Keep in sync with memcg_exact_page_state(). | |
556 | */ | |
205b20cc JW |
557 | static inline unsigned long memcg_page_state_local(struct mem_cgroup *memcg, |
558 | int idx) | |
2a2e4885 | 559 | { |
871789d4 | 560 | long x = atomic_long_read(&memcg->vmstats[idx]); |
a983b5eb JW |
561 | #ifdef CONFIG_SMP |
562 | if (x < 0) | |
563 | x = 0; | |
564 | #endif | |
565 | return x; | |
2a2e4885 JW |
566 | } |
567 | ||
db9adbcb | 568 | void __mod_memcg_state(struct mem_cgroup *memcg, int idx, int val); |
2a2e4885 | 569 | |
04fecbf5 | 570 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 571 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 572 | int idx, int val) |
2a2e4885 | 573 | { |
c3cc3911 JW |
574 | unsigned long flags; |
575 | ||
576 | local_irq_save(flags); | |
a983b5eb | 577 | __mod_memcg_state(memcg, idx, val); |
c3cc3911 | 578 | local_irq_restore(flags); |
2a2e4885 JW |
579 | } |
580 | ||
33398cf2 | 581 | /** |
ccda7f43 | 582 | * mod_memcg_page_state - update page state statistics |
62cccb8c | 583 | * @page: the page |
33398cf2 MH |
584 | * @idx: page state item to account |
585 | * @val: number of pages (positive or negative) | |
586 | * | |
fdf1cdb9 JW |
587 | * The @page must be locked or the caller must use lock_page_memcg() |
588 | * to prevent double accounting when the page is concurrently being | |
589 | * moved to another memcg: | |
81f8c3a4 | 590 | * |
fdf1cdb9 | 591 | * lock_page(page) or lock_page_memcg(page) |
81f8c3a4 | 592 | * if (TestClearPageState(page)) |
ccda7f43 | 593 | * mod_memcg_page_state(page, state, -1); |
fdf1cdb9 | 594 | * unlock_page(page) or unlock_page_memcg(page) |
2a2e4885 JW |
595 | * |
596 | * Kernel pages are an exception to this, since they'll never move. | |
33398cf2 | 597 | */ |
00f3ca2c | 598 | static inline void __mod_memcg_page_state(struct page *page, |
04fecbf5 | 599 | int idx, int val) |
00f3ca2c JW |
600 | { |
601 | if (page->mem_cgroup) | |
602 | __mod_memcg_state(page->mem_cgroup, idx, val); | |
603 | } | |
604 | ||
ccda7f43 | 605 | static inline void mod_memcg_page_state(struct page *page, |
04fecbf5 | 606 | int idx, int val) |
33398cf2 | 607 | { |
62cccb8c | 608 | if (page->mem_cgroup) |
ccda7f43 | 609 | mod_memcg_state(page->mem_cgroup, idx, val); |
33398cf2 MH |
610 | } |
611 | ||
205b20cc JW |
612 | static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
613 | enum node_stat_item idx) | |
2a7106f2 | 614 | { |
00f3ca2c | 615 | struct mem_cgroup_per_node *pn; |
a983b5eb | 616 | long x; |
00f3ca2c JW |
617 | |
618 | if (mem_cgroup_disabled()) | |
619 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
620 | ||
621 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
a983b5eb JW |
622 | x = atomic_long_read(&pn->lruvec_stat[idx]); |
623 | #ifdef CONFIG_SMP | |
624 | if (x < 0) | |
625 | x = 0; | |
626 | #endif | |
627 | return x; | |
2a7106f2 GT |
628 | } |
629 | ||
db9adbcb JW |
630 | void __mod_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx, |
631 | int val); | |
00f3ca2c JW |
632 | |
633 | static inline void mod_lruvec_state(struct lruvec *lruvec, | |
634 | enum node_stat_item idx, int val) | |
635 | { | |
c3cc3911 JW |
636 | unsigned long flags; |
637 | ||
638 | local_irq_save(flags); | |
28454265 | 639 | __mod_lruvec_state(lruvec, idx, val); |
c3cc3911 | 640 | local_irq_restore(flags); |
00f3ca2c JW |
641 | } |
642 | ||
643 | static inline void __mod_lruvec_page_state(struct page *page, | |
644 | enum node_stat_item idx, int val) | |
645 | { | |
28454265 JW |
646 | pg_data_t *pgdat = page_pgdat(page); |
647 | struct lruvec *lruvec; | |
00f3ca2c | 648 | |
28454265 JW |
649 | /* Untracked pages have no memcg, no lruvec. Update only the node */ |
650 | if (!page->mem_cgroup) { | |
651 | __mod_node_page_state(pgdat, idx, val); | |
00f3ca2c | 652 | return; |
28454265 JW |
653 | } |
654 | ||
655 | lruvec = mem_cgroup_lruvec(pgdat, page->mem_cgroup); | |
656 | __mod_lruvec_state(lruvec, idx, val); | |
00f3ca2c JW |
657 | } |
658 | ||
659 | static inline void mod_lruvec_page_state(struct page *page, | |
660 | enum node_stat_item idx, int val) | |
661 | { | |
c3cc3911 JW |
662 | unsigned long flags; |
663 | ||
664 | local_irq_save(flags); | |
28454265 | 665 | __mod_lruvec_page_state(page, idx, val); |
c3cc3911 | 666 | local_irq_restore(flags); |
2a7106f2 GT |
667 | } |
668 | ||
ef8f2327 | 669 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
670 | gfp_t gfp_mask, |
671 | unsigned long *total_scanned); | |
a63d83f4 | 672 | |
db9adbcb JW |
673 | void __count_memcg_events(struct mem_cgroup *memcg, enum vm_event_item idx, |
674 | unsigned long count); | |
c9019e9b | 675 | |
2262185c | 676 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
e27be240 JW |
677 | enum vm_event_item idx, |
678 | unsigned long count) | |
2262185c | 679 | { |
c3cc3911 JW |
680 | unsigned long flags; |
681 | ||
682 | local_irq_save(flags); | |
a983b5eb | 683 | __count_memcg_events(memcg, idx, count); |
c3cc3911 | 684 | local_irq_restore(flags); |
2262185c RG |
685 | } |
686 | ||
687 | static inline void count_memcg_page_event(struct page *page, | |
e27be240 | 688 | enum vm_event_item idx) |
2262185c RG |
689 | { |
690 | if (page->mem_cgroup) | |
691 | count_memcg_events(page->mem_cgroup, idx, 1); | |
692 | } | |
693 | ||
694 | static inline void count_memcg_event_mm(struct mm_struct *mm, | |
695 | enum vm_event_item idx) | |
68ae564b | 696 | { |
33398cf2 MH |
697 | struct mem_cgroup *memcg; |
698 | ||
68ae564b DR |
699 | if (mem_cgroup_disabled()) |
700 | return; | |
33398cf2 MH |
701 | |
702 | rcu_read_lock(); | |
703 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
fe6bdfc8 | 704 | if (likely(memcg)) |
c9019e9b | 705 | count_memcg_events(memcg, idx, 1); |
33398cf2 | 706 | rcu_read_unlock(); |
68ae564b | 707 | } |
c9019e9b | 708 | |
e27be240 JW |
709 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
710 | enum memcg_memory_event event) | |
c9019e9b | 711 | { |
e27be240 | 712 | atomic_long_inc(&memcg->memory_events[event]); |
c9019e9b JW |
713 | cgroup_file_notify(&memcg->events_file); |
714 | } | |
715 | ||
fe6bdfc8 RG |
716 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
717 | enum memcg_memory_event event) | |
718 | { | |
719 | struct mem_cgroup *memcg; | |
720 | ||
721 | if (mem_cgroup_disabled()) | |
722 | return; | |
723 | ||
724 | rcu_read_lock(); | |
725 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
726 | if (likely(memcg)) | |
727 | memcg_memory_event(memcg, event); | |
728 | rcu_read_unlock(); | |
729 | } | |
730 | ||
ca3e0214 | 731 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
e94c8a9c | 732 | void mem_cgroup_split_huge_fixup(struct page *head); |
ca3e0214 KH |
733 | #endif |
734 | ||
c255a458 | 735 | #else /* CONFIG_MEMCG */ |
23047a96 JW |
736 | |
737 | #define MEM_CGROUP_ID_SHIFT 0 | |
738 | #define MEM_CGROUP_ID_MAX 0 | |
739 | ||
7a81b88c KH |
740 | struct mem_cgroup; |
741 | ||
dfd2f10c KT |
742 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
743 | { | |
744 | return true; | |
745 | } | |
746 | ||
23047a96 JW |
747 | static inline bool mem_cgroup_disabled(void) |
748 | { | |
749 | return true; | |
750 | } | |
751 | ||
e27be240 JW |
752 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
753 | enum memcg_memory_event event) | |
241994ed JW |
754 | { |
755 | } | |
756 | ||
fe6bdfc8 RG |
757 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
758 | enum memcg_memory_event event) | |
759 | { | |
760 | } | |
761 | ||
bf8d5d52 RG |
762 | static inline enum mem_cgroup_protection mem_cgroup_protected( |
763 | struct mem_cgroup *root, struct mem_cgroup *memcg) | |
241994ed | 764 | { |
bf8d5d52 | 765 | return MEMCG_PROT_NONE; |
241994ed JW |
766 | } |
767 | ||
00501b53 JW |
768 | static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
769 | gfp_t gfp_mask, | |
f627c2f5 KS |
770 | struct mem_cgroup **memcgp, |
771 | bool compound) | |
7a81b88c | 772 | { |
00501b53 | 773 | *memcgp = NULL; |
7a81b88c KH |
774 | return 0; |
775 | } | |
776 | ||
2cf85583 TH |
777 | static inline int mem_cgroup_try_charge_delay(struct page *page, |
778 | struct mm_struct *mm, | |
779 | gfp_t gfp_mask, | |
780 | struct mem_cgroup **memcgp, | |
781 | bool compound) | |
782 | { | |
783 | *memcgp = NULL; | |
784 | return 0; | |
785 | } | |
786 | ||
00501b53 JW |
787 | static inline void mem_cgroup_commit_charge(struct page *page, |
788 | struct mem_cgroup *memcg, | |
f627c2f5 | 789 | bool lrucare, bool compound) |
7a81b88c KH |
790 | { |
791 | } | |
792 | ||
00501b53 | 793 | static inline void mem_cgroup_cancel_charge(struct page *page, |
f627c2f5 KS |
794 | struct mem_cgroup *memcg, |
795 | bool compound) | |
7a81b88c KH |
796 | { |
797 | } | |
798 | ||
0a31bc97 | 799 | static inline void mem_cgroup_uncharge(struct page *page) |
569b846d KH |
800 | { |
801 | } | |
802 | ||
747db954 | 803 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
8a9f3ccd BS |
804 | { |
805 | } | |
806 | ||
6a93ca8f | 807 | static inline void mem_cgroup_migrate(struct page *old, struct page *new) |
69029cd5 KH |
808 | { |
809 | } | |
810 | ||
a9dd0a83 | 811 | static inline struct lruvec *mem_cgroup_lruvec(struct pglist_data *pgdat, |
ef8f2327 | 812 | struct mem_cgroup *memcg) |
08e552c6 | 813 | { |
a9dd0a83 | 814 | return node_lruvec(pgdat); |
08e552c6 KH |
815 | } |
816 | ||
fa9add64 | 817 | static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, |
599d0c95 | 818 | struct pglist_data *pgdat) |
66e1707b | 819 | { |
599d0c95 | 820 | return &pgdat->lruvec; |
66e1707b BS |
821 | } |
822 | ||
587af308 | 823 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
c0ff4b85 | 824 | struct mem_cgroup *memcg) |
bed7161a | 825 | { |
587af308 | 826 | return true; |
bed7161a BS |
827 | } |
828 | ||
ffbdccf5 DR |
829 | static inline bool task_in_mem_cgroup(struct task_struct *task, |
830 | const struct mem_cgroup *memcg) | |
4c4a2214 | 831 | { |
ffbdccf5 | 832 | return true; |
4c4a2214 DR |
833 | } |
834 | ||
d46eb14b SB |
835 | static inline struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm) |
836 | { | |
837 | return NULL; | |
838 | } | |
839 | ||
f745c6f5 SB |
840 | static inline struct mem_cgroup *get_mem_cgroup_from_page(struct page *page) |
841 | { | |
842 | return NULL; | |
843 | } | |
844 | ||
dc0b5864 RG |
845 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
846 | { | |
847 | } | |
848 | ||
5660048c JW |
849 | static inline struct mem_cgroup * |
850 | mem_cgroup_iter(struct mem_cgroup *root, | |
851 | struct mem_cgroup *prev, | |
852 | struct mem_cgroup_reclaim_cookie *reclaim) | |
853 | { | |
854 | return NULL; | |
855 | } | |
856 | ||
857 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
858 | struct mem_cgroup *prev) | |
859 | { | |
860 | } | |
861 | ||
7c5f64f8 VD |
862 | static inline int mem_cgroup_scan_tasks(struct mem_cgroup *memcg, |
863 | int (*fn)(struct task_struct *, void *), void *arg) | |
864 | { | |
865 | return 0; | |
866 | } | |
867 | ||
23047a96 | 868 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
f8d66542 | 869 | { |
23047a96 JW |
870 | return 0; |
871 | } | |
872 | ||
873 | static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id) | |
874 | { | |
875 | WARN_ON_ONCE(id); | |
876 | /* XXX: This should always return root_mem_cgroup */ | |
877 | return NULL; | |
f8d66542 | 878 | } |
a636b327 | 879 | |
aa9694bb CD |
880 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
881 | { | |
882 | return NULL; | |
883 | } | |
884 | ||
2262185c RG |
885 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
886 | { | |
887 | return NULL; | |
888 | } | |
889 | ||
eb01aaab | 890 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
14797e23 | 891 | { |
13308ca9 | 892 | return true; |
14797e23 KM |
893 | } |
894 | ||
b4536f0c MH |
895 | static inline |
896 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
897 | enum lru_list lru, int zone_idx) | |
898 | { | |
899 | return 0; | |
900 | } | |
a3d8e054 | 901 | |
bbec2e15 | 902 | static inline unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg) |
7c5f64f8 VD |
903 | { |
904 | return 0; | |
905 | } | |
906 | ||
e222432b | 907 | static inline void |
f0c867d9 | 908 | mem_cgroup_print_oom_context(struct mem_cgroup *memcg, struct task_struct *p) |
909 | { | |
910 | } | |
911 | ||
912 | static inline void | |
913 | mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg) | |
e222432b BS |
914 | { |
915 | } | |
916 | ||
739f79fc JW |
917 | static inline struct mem_cgroup *lock_page_memcg(struct page *page) |
918 | { | |
919 | return NULL; | |
920 | } | |
921 | ||
922 | static inline void __unlock_page_memcg(struct mem_cgroup *memcg) | |
89c06bd5 KH |
923 | { |
924 | } | |
925 | ||
62cccb8c | 926 | static inline void unlock_page_memcg(struct page *page) |
89c06bd5 KH |
927 | { |
928 | } | |
929 | ||
b23afb93 TH |
930 | static inline void mem_cgroup_handle_over_high(void) |
931 | { | |
932 | } | |
933 | ||
29ef680a | 934 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 JW |
935 | { |
936 | } | |
937 | ||
29ef680a | 938 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 JW |
939 | { |
940 | } | |
941 | ||
3812c8c8 JW |
942 | static inline bool task_in_memcg_oom(struct task_struct *p) |
943 | { | |
944 | return false; | |
945 | } | |
946 | ||
49426420 | 947 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
3812c8c8 JW |
948 | { |
949 | return false; | |
950 | } | |
951 | ||
3d8b38eb RG |
952 | static inline struct mem_cgroup *mem_cgroup_get_oom_group( |
953 | struct task_struct *victim, struct mem_cgroup *oom_domain) | |
954 | { | |
955 | return NULL; | |
956 | } | |
957 | ||
958 | static inline void mem_cgroup_print_oom_group(struct mem_cgroup *memcg) | |
959 | { | |
960 | } | |
961 | ||
205b20cc JW |
962 | static inline unsigned long memcg_page_state_local(struct mem_cgroup *memcg, |
963 | int idx) | |
2a2e4885 JW |
964 | { |
965 | return 0; | |
966 | } | |
967 | ||
00f3ca2c | 968 | static inline void __mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 969 | int idx, |
00f3ca2c | 970 | int nr) |
2a2e4885 JW |
971 | { |
972 | } | |
973 | ||
00f3ca2c | 974 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 975 | int idx, |
00f3ca2c | 976 | int nr) |
2a2e4885 JW |
977 | { |
978 | } | |
979 | ||
00f3ca2c | 980 | static inline void __mod_memcg_page_state(struct page *page, |
04fecbf5 | 981 | int idx, |
00f3ca2c | 982 | int nr) |
2a2e4885 JW |
983 | { |
984 | } | |
985 | ||
ccda7f43 | 986 | static inline void mod_memcg_page_state(struct page *page, |
04fecbf5 | 987 | int idx, |
ccda7f43 | 988 | int nr) |
553af430 JW |
989 | { |
990 | } | |
991 | ||
205b20cc JW |
992 | static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
993 | enum node_stat_item idx) | |
2a7106f2 | 994 | { |
00f3ca2c | 995 | return node_page_state(lruvec_pgdat(lruvec), idx); |
2a7106f2 GT |
996 | } |
997 | ||
00f3ca2c JW |
998 | static inline void __mod_lruvec_state(struct lruvec *lruvec, |
999 | enum node_stat_item idx, int val) | |
d69b042f | 1000 | { |
00f3ca2c JW |
1001 | __mod_node_page_state(lruvec_pgdat(lruvec), idx, val); |
1002 | } | |
1003 | ||
1004 | static inline void mod_lruvec_state(struct lruvec *lruvec, | |
1005 | enum node_stat_item idx, int val) | |
1006 | { | |
1007 | mod_node_page_state(lruvec_pgdat(lruvec), idx, val); | |
1008 | } | |
1009 | ||
1010 | static inline void __mod_lruvec_page_state(struct page *page, | |
1011 | enum node_stat_item idx, int val) | |
1012 | { | |
1013 | __mod_node_page_state(page_pgdat(page), idx, val); | |
1014 | } | |
1015 | ||
1016 | static inline void mod_lruvec_page_state(struct page *page, | |
1017 | enum node_stat_item idx, int val) | |
1018 | { | |
1019 | mod_node_page_state(page_pgdat(page), idx, val); | |
d69b042f BS |
1020 | } |
1021 | ||
4e416953 | 1022 | static inline |
ef8f2327 | 1023 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
1024 | gfp_t gfp_mask, |
1025 | unsigned long *total_scanned) | |
4e416953 | 1026 | { |
0608f43d | 1027 | return 0; |
4e416953 BS |
1028 | } |
1029 | ||
e94c8a9c | 1030 | static inline void mem_cgroup_split_huge_fixup(struct page *head) |
ca3e0214 KH |
1031 | { |
1032 | } | |
1033 | ||
2262185c RG |
1034 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
1035 | enum vm_event_item idx, | |
1036 | unsigned long count) | |
1037 | { | |
1038 | } | |
1039 | ||
9851ac13 KT |
1040 | static inline void __count_memcg_events(struct mem_cgroup *memcg, |
1041 | enum vm_event_item idx, | |
1042 | unsigned long count) | |
1043 | { | |
1044 | } | |
1045 | ||
2262185c | 1046 | static inline void count_memcg_page_event(struct page *page, |
04fecbf5 | 1047 | int idx) |
2262185c RG |
1048 | { |
1049 | } | |
1050 | ||
456f998e | 1051 | static inline |
2262185c | 1052 | void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx) |
456f998e YH |
1053 | { |
1054 | } | |
c255a458 | 1055 | #endif /* CONFIG_MEMCG */ |
78fb7466 | 1056 | |
04fecbf5 | 1057 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1058 | static inline void __inc_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1059 | int idx) |
00f3ca2c JW |
1060 | { |
1061 | __mod_memcg_state(memcg, idx, 1); | |
1062 | } | |
1063 | ||
04fecbf5 | 1064 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1065 | static inline void __dec_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1066 | int idx) |
00f3ca2c JW |
1067 | { |
1068 | __mod_memcg_state(memcg, idx, -1); | |
1069 | } | |
1070 | ||
04fecbf5 | 1071 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1072 | static inline void __inc_memcg_page_state(struct page *page, |
04fecbf5 | 1073 | int idx) |
00f3ca2c JW |
1074 | { |
1075 | __mod_memcg_page_state(page, idx, 1); | |
1076 | } | |
1077 | ||
04fecbf5 | 1078 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1079 | static inline void __dec_memcg_page_state(struct page *page, |
04fecbf5 | 1080 | int idx) |
00f3ca2c JW |
1081 | { |
1082 | __mod_memcg_page_state(page, idx, -1); | |
1083 | } | |
1084 | ||
1085 | static inline void __inc_lruvec_state(struct lruvec *lruvec, | |
1086 | enum node_stat_item idx) | |
1087 | { | |
1088 | __mod_lruvec_state(lruvec, idx, 1); | |
1089 | } | |
1090 | ||
1091 | static inline void __dec_lruvec_state(struct lruvec *lruvec, | |
1092 | enum node_stat_item idx) | |
1093 | { | |
1094 | __mod_lruvec_state(lruvec, idx, -1); | |
1095 | } | |
1096 | ||
1097 | static inline void __inc_lruvec_page_state(struct page *page, | |
1098 | enum node_stat_item idx) | |
1099 | { | |
1100 | __mod_lruvec_page_state(page, idx, 1); | |
1101 | } | |
1102 | ||
1103 | static inline void __dec_lruvec_page_state(struct page *page, | |
1104 | enum node_stat_item idx) | |
1105 | { | |
1106 | __mod_lruvec_page_state(page, idx, -1); | |
1107 | } | |
1108 | ||
04fecbf5 | 1109 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1110 | static inline void inc_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1111 | int idx) |
00f3ca2c JW |
1112 | { |
1113 | mod_memcg_state(memcg, idx, 1); | |
1114 | } | |
1115 | ||
04fecbf5 | 1116 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1117 | static inline void dec_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1118 | int idx) |
00f3ca2c JW |
1119 | { |
1120 | mod_memcg_state(memcg, idx, -1); | |
1121 | } | |
1122 | ||
04fecbf5 | 1123 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1124 | static inline void inc_memcg_page_state(struct page *page, |
04fecbf5 | 1125 | int idx) |
00f3ca2c JW |
1126 | { |
1127 | mod_memcg_page_state(page, idx, 1); | |
1128 | } | |
1129 | ||
04fecbf5 | 1130 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1131 | static inline void dec_memcg_page_state(struct page *page, |
04fecbf5 | 1132 | int idx) |
00f3ca2c JW |
1133 | { |
1134 | mod_memcg_page_state(page, idx, -1); | |
1135 | } | |
1136 | ||
1137 | static inline void inc_lruvec_state(struct lruvec *lruvec, | |
1138 | enum node_stat_item idx) | |
1139 | { | |
1140 | mod_lruvec_state(lruvec, idx, 1); | |
1141 | } | |
1142 | ||
1143 | static inline void dec_lruvec_state(struct lruvec *lruvec, | |
1144 | enum node_stat_item idx) | |
1145 | { | |
1146 | mod_lruvec_state(lruvec, idx, -1); | |
1147 | } | |
1148 | ||
1149 | static inline void inc_lruvec_page_state(struct page *page, | |
1150 | enum node_stat_item idx) | |
1151 | { | |
1152 | mod_lruvec_page_state(page, idx, 1); | |
1153 | } | |
1154 | ||
1155 | static inline void dec_lruvec_page_state(struct page *page, | |
1156 | enum node_stat_item idx) | |
1157 | { | |
1158 | mod_lruvec_page_state(page, idx, -1); | |
1159 | } | |
1160 | ||
52ebea74 | 1161 | #ifdef CONFIG_CGROUP_WRITEBACK |
841710aa | 1162 | |
841710aa | 1163 | struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb); |
c5edf9cd TH |
1164 | void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages, |
1165 | unsigned long *pheadroom, unsigned long *pdirty, | |
1166 | unsigned long *pwriteback); | |
841710aa TH |
1167 | |
1168 | #else /* CONFIG_CGROUP_WRITEBACK */ | |
1169 | ||
1170 | static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb) | |
1171 | { | |
1172 | return NULL; | |
1173 | } | |
1174 | ||
c2aa723a | 1175 | static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb, |
c5edf9cd TH |
1176 | unsigned long *pfilepages, |
1177 | unsigned long *pheadroom, | |
c2aa723a TH |
1178 | unsigned long *pdirty, |
1179 | unsigned long *pwriteback) | |
1180 | { | |
1181 | } | |
1182 | ||
841710aa | 1183 | #endif /* CONFIG_CGROUP_WRITEBACK */ |
52ebea74 | 1184 | |
e1aab161 | 1185 | struct sock; |
baac50bb JW |
1186 | bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); |
1187 | void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); | |
d886f4e4 | 1188 | #ifdef CONFIG_MEMCG |
ef12947c JW |
1189 | extern struct static_key_false memcg_sockets_enabled_key; |
1190 | #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key) | |
2d758073 JW |
1191 | void mem_cgroup_sk_alloc(struct sock *sk); |
1192 | void mem_cgroup_sk_free(struct sock *sk); | |
baac50bb | 1193 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c | 1194 | { |
0db15298 | 1195 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && memcg->tcpmem_pressure) |
8e8ae645 | 1196 | return true; |
8e8ae645 JW |
1197 | do { |
1198 | if (time_before(jiffies, memcg->socket_pressure)) | |
1199 | return true; | |
1200 | } while ((memcg = parent_mem_cgroup(memcg))); | |
1201 | return false; | |
e805605c JW |
1202 | } |
1203 | #else | |
80e95fe0 | 1204 | #define mem_cgroup_sockets_enabled 0 |
2d758073 JW |
1205 | static inline void mem_cgroup_sk_alloc(struct sock *sk) { }; |
1206 | static inline void mem_cgroup_sk_free(struct sock *sk) { }; | |
baac50bb | 1207 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c JW |
1208 | { |
1209 | return false; | |
1210 | } | |
1211 | #endif | |
7ae1e1d0 | 1212 | |
45264778 VD |
1213 | struct kmem_cache *memcg_kmem_get_cache(struct kmem_cache *cachep); |
1214 | void memcg_kmem_put_cache(struct kmem_cache *cachep); | |
9b6f7e16 RG |
1215 | |
1216 | #ifdef CONFIG_MEMCG_KMEM | |
60cd4bcd SB |
1217 | int __memcg_kmem_charge(struct page *page, gfp_t gfp, int order); |
1218 | void __memcg_kmem_uncharge(struct page *page, int order); | |
1219 | int __memcg_kmem_charge_memcg(struct page *page, gfp_t gfp, int order, | |
1220 | struct mem_cgroup *memcg); | |
45264778 | 1221 | |
ef12947c | 1222 | extern struct static_key_false memcg_kmem_enabled_key; |
17cc4dfe | 1223 | extern struct workqueue_struct *memcg_kmem_cache_wq; |
749c5415 | 1224 | |
dbcf73e2 | 1225 | extern int memcg_nr_cache_ids; |
64219994 MH |
1226 | void memcg_get_cache_ids(void); |
1227 | void memcg_put_cache_ids(void); | |
ebe945c2 GC |
1228 | |
1229 | /* | |
1230 | * Helper macro to loop through all memcg-specific caches. Callers must still | |
1231 | * check if the cache is valid (it is either valid or NULL). | |
1232 | * the slab_mutex must be held when looping through those caches | |
1233 | */ | |
749c5415 | 1234 | #define for_each_memcg_cache_index(_idx) \ |
dbcf73e2 | 1235 | for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++) |
749c5415 | 1236 | |
7ae1e1d0 GC |
1237 | static inline bool memcg_kmem_enabled(void) |
1238 | { | |
ef12947c | 1239 | return static_branch_unlikely(&memcg_kmem_enabled_key); |
7ae1e1d0 GC |
1240 | } |
1241 | ||
60cd4bcd SB |
1242 | static inline int memcg_kmem_charge(struct page *page, gfp_t gfp, int order) |
1243 | { | |
1244 | if (memcg_kmem_enabled()) | |
1245 | return __memcg_kmem_charge(page, gfp, order); | |
1246 | return 0; | |
1247 | } | |
1248 | ||
1249 | static inline void memcg_kmem_uncharge(struct page *page, int order) | |
1250 | { | |
1251 | if (memcg_kmem_enabled()) | |
1252 | __memcg_kmem_uncharge(page, order); | |
1253 | } | |
1254 | ||
1255 | static inline int memcg_kmem_charge_memcg(struct page *page, gfp_t gfp, | |
1256 | int order, struct mem_cgroup *memcg) | |
1257 | { | |
1258 | if (memcg_kmem_enabled()) | |
1259 | return __memcg_kmem_charge_memcg(page, gfp, order, memcg); | |
1260 | return 0; | |
1261 | } | |
33398cf2 | 1262 | /* |
9f706d68 | 1263 | * helper for accessing a memcg's index. It will be used as an index in the |
33398cf2 MH |
1264 | * child cache array in kmem_cache, and also to derive its name. This function |
1265 | * will return -1 when this is not a kmem-limited memcg. | |
1266 | */ | |
1267 | static inline int memcg_cache_id(struct mem_cgroup *memcg) | |
1268 | { | |
1269 | return memcg ? memcg->kmemcg_id : -1; | |
1270 | } | |
5722d094 | 1271 | |
0a4465d3 KT |
1272 | extern int memcg_expand_shrinker_maps(int new_id); |
1273 | ||
fae91d6d KT |
1274 | extern void memcg_set_shrinker_bit(struct mem_cgroup *memcg, |
1275 | int nid, int shrinker_id); | |
7ae1e1d0 | 1276 | #else |
9b6f7e16 RG |
1277 | |
1278 | static inline int memcg_kmem_charge(struct page *page, gfp_t gfp, int order) | |
1279 | { | |
1280 | return 0; | |
1281 | } | |
1282 | ||
1283 | static inline void memcg_kmem_uncharge(struct page *page, int order) | |
1284 | { | |
1285 | } | |
1286 | ||
60cd4bcd SB |
1287 | static inline int __memcg_kmem_charge(struct page *page, gfp_t gfp, int order) |
1288 | { | |
1289 | return 0; | |
1290 | } | |
1291 | ||
1292 | static inline void __memcg_kmem_uncharge(struct page *page, int order) | |
1293 | { | |
1294 | } | |
1295 | ||
749c5415 GC |
1296 | #define for_each_memcg_cache_index(_idx) \ |
1297 | for (; NULL; ) | |
1298 | ||
b9ce5ef4 GC |
1299 | static inline bool memcg_kmem_enabled(void) |
1300 | { | |
1301 | return false; | |
1302 | } | |
1303 | ||
2633d7a0 GC |
1304 | static inline int memcg_cache_id(struct mem_cgroup *memcg) |
1305 | { | |
1306 | return -1; | |
1307 | } | |
1308 | ||
05257a1a VD |
1309 | static inline void memcg_get_cache_ids(void) |
1310 | { | |
1311 | } | |
1312 | ||
1313 | static inline void memcg_put_cache_ids(void) | |
1314 | { | |
1315 | } | |
1316 | ||
fae91d6d KT |
1317 | static inline void memcg_set_shrinker_bit(struct mem_cgroup *memcg, |
1318 | int nid, int shrinker_id) { } | |
84c07d11 | 1319 | #endif /* CONFIG_MEMCG_KMEM */ |
127424c8 | 1320 | |
8cdea7c0 | 1321 | #endif /* _LINUX_MEMCONTROL_H */ |