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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]; | |
42a30035 | 131 | atomic_long_t lruvec_stat_local[NR_VM_NODE_STAT_ITEMS]; |
a983b5eb | 132 | |
b4536f0c | 133 | unsigned long lru_zone_size[MAX_NR_ZONES][NR_LRU_LISTS]; |
33398cf2 MH |
134 | |
135 | struct mem_cgroup_reclaim_iter iter[DEF_PRIORITY + 1]; | |
136 | ||
0a4465d3 KT |
137 | #ifdef CONFIG_MEMCG_KMEM |
138 | struct memcg_shrinker_map __rcu *shrinker_map; | |
139 | #endif | |
33398cf2 MH |
140 | struct rb_node tree_node; /* RB tree node */ |
141 | unsigned long usage_in_excess;/* Set to the value by which */ | |
142 | /* the soft limit is exceeded*/ | |
143 | bool on_tree; | |
e3c1ac58 AR |
144 | bool congested; /* memcg has many dirty pages */ |
145 | /* backed by a congested BDI */ | |
146 | ||
33398cf2 MH |
147 | struct mem_cgroup *memcg; /* Back pointer, we cannot */ |
148 | /* use container_of */ | |
149 | }; | |
150 | ||
33398cf2 MH |
151 | struct mem_cgroup_threshold { |
152 | struct eventfd_ctx *eventfd; | |
153 | unsigned long threshold; | |
154 | }; | |
155 | ||
156 | /* For threshold */ | |
157 | struct mem_cgroup_threshold_ary { | |
158 | /* An array index points to threshold just below or equal to usage. */ | |
159 | int current_threshold; | |
160 | /* Size of entries[] */ | |
161 | unsigned int size; | |
162 | /* Array of thresholds */ | |
163 | struct mem_cgroup_threshold entries[0]; | |
164 | }; | |
165 | ||
166 | struct mem_cgroup_thresholds { | |
167 | /* Primary thresholds array */ | |
168 | struct mem_cgroup_threshold_ary *primary; | |
169 | /* | |
170 | * Spare threshold array. | |
171 | * This is needed to make mem_cgroup_unregister_event() "never fail". | |
172 | * It must be able to store at least primary->size - 1 entries. | |
173 | */ | |
174 | struct mem_cgroup_threshold_ary *spare; | |
175 | }; | |
176 | ||
567e9ab2 JW |
177 | enum memcg_kmem_state { |
178 | KMEM_NONE, | |
179 | KMEM_ALLOCATED, | |
180 | KMEM_ONLINE, | |
181 | }; | |
182 | ||
e81bf979 AL |
183 | #if defined(CONFIG_SMP) |
184 | struct memcg_padding { | |
185 | char x[0]; | |
186 | } ____cacheline_internodealigned_in_smp; | |
187 | #define MEMCG_PADDING(name) struct memcg_padding name; | |
188 | #else | |
189 | #define MEMCG_PADDING(name) | |
190 | #endif | |
191 | ||
33398cf2 MH |
192 | /* |
193 | * The memory controller data structure. The memory controller controls both | |
194 | * page cache and RSS per cgroup. We would eventually like to provide | |
195 | * statistics based on the statistics developed by Rik Van Riel for clock-pro, | |
196 | * to help the administrator determine what knobs to tune. | |
197 | */ | |
198 | struct mem_cgroup { | |
199 | struct cgroup_subsys_state css; | |
200 | ||
73f576c0 JW |
201 | /* Private memcg ID. Used to ID objects that outlive the cgroup */ |
202 | struct mem_cgroup_id id; | |
203 | ||
33398cf2 MH |
204 | /* Accounted resources */ |
205 | struct page_counter memory; | |
37e84351 | 206 | struct page_counter swap; |
0db15298 JW |
207 | |
208 | /* Legacy consumer-oriented counters */ | |
33398cf2 MH |
209 | struct page_counter memsw; |
210 | struct page_counter kmem; | |
0db15298 | 211 | struct page_counter tcpmem; |
33398cf2 | 212 | |
23067153 | 213 | /* Upper bound of normal memory consumption range */ |
33398cf2 MH |
214 | unsigned long high; |
215 | ||
f7e1cb6e JW |
216 | /* Range enforcement for interrupt charges */ |
217 | struct work_struct high_work; | |
218 | ||
33398cf2 MH |
219 | unsigned long soft_limit; |
220 | ||
221 | /* vmpressure notifications */ | |
222 | struct vmpressure vmpressure; | |
223 | ||
33398cf2 MH |
224 | /* |
225 | * Should the accounting and control be hierarchical, per subtree? | |
226 | */ | |
227 | bool use_hierarchy; | |
228 | ||
3d8b38eb RG |
229 | /* |
230 | * Should the OOM killer kill all belonging tasks, had it kill one? | |
231 | */ | |
232 | bool oom_group; | |
233 | ||
33398cf2 MH |
234 | /* protected by memcg_oom_lock */ |
235 | bool oom_lock; | |
236 | int under_oom; | |
237 | ||
238 | int swappiness; | |
239 | /* OOM-Killer disable */ | |
240 | int oom_kill_disable; | |
241 | ||
e27be240 | 242 | /* memory.events */ |
472912a2 TH |
243 | struct cgroup_file events_file; |
244 | ||
f3a53a3a TH |
245 | /* handle for "memory.swap.events" */ |
246 | struct cgroup_file swap_events_file; | |
247 | ||
33398cf2 MH |
248 | /* protect arrays of thresholds */ |
249 | struct mutex thresholds_lock; | |
250 | ||
251 | /* thresholds for memory usage. RCU-protected */ | |
252 | struct mem_cgroup_thresholds thresholds; | |
253 | ||
254 | /* thresholds for mem+swap usage. RCU-protected */ | |
255 | struct mem_cgroup_thresholds memsw_thresholds; | |
256 | ||
257 | /* For oom notifier event fd */ | |
258 | struct list_head oom_notify; | |
259 | ||
260 | /* | |
261 | * Should we move charges of a task when a task is moved into this | |
262 | * mem_cgroup ? And what type of charges should we move ? | |
263 | */ | |
264 | unsigned long move_charge_at_immigrate; | |
e81bf979 AL |
265 | /* taken only while moving_account > 0 */ |
266 | spinlock_t move_lock; | |
267 | unsigned long move_lock_flags; | |
268 | ||
269 | MEMCG_PADDING(_pad1_); | |
270 | ||
33398cf2 MH |
271 | /* |
272 | * set > 0 if pages under this cgroup are moving to other cgroup. | |
273 | */ | |
274 | atomic_t moving_account; | |
33398cf2 | 275 | struct task_struct *move_lock_task; |
a983b5eb | 276 | |
e27be240 | 277 | /* memory.stat */ |
871789d4 | 278 | struct memcg_vmstats_percpu __percpu *vmstats_percpu; |
e81bf979 AL |
279 | |
280 | MEMCG_PADDING(_pad2_); | |
281 | ||
871789d4 | 282 | atomic_long_t vmstats[MEMCG_NR_STAT]; |
42a30035 JW |
283 | atomic_long_t vmstats_local[MEMCG_NR_STAT]; |
284 | ||
871789d4 | 285 | atomic_long_t vmevents[NR_VM_EVENT_ITEMS]; |
42a30035 JW |
286 | atomic_long_t vmevents_local[NR_VM_EVENT_ITEMS]; |
287 | ||
288 | atomic_long_t memory_events[MEMCG_NR_MEMORY_EVENTS]; | |
33398cf2 | 289 | |
d886f4e4 JW |
290 | unsigned long socket_pressure; |
291 | ||
292 | /* Legacy tcp memory accounting */ | |
0db15298 JW |
293 | bool tcpmem_active; |
294 | int tcpmem_pressure; | |
d886f4e4 | 295 | |
84c07d11 | 296 | #ifdef CONFIG_MEMCG_KMEM |
33398cf2 MH |
297 | /* Index in the kmem_cache->memcg_params.memcg_caches array */ |
298 | int kmemcg_id; | |
567e9ab2 | 299 | enum memcg_kmem_state kmem_state; |
bc2791f8 | 300 | struct list_head kmem_caches; |
33398cf2 MH |
301 | #endif |
302 | ||
303 | int last_scanned_node; | |
304 | #if MAX_NUMNODES > 1 | |
305 | nodemask_t scan_nodes; | |
306 | atomic_t numainfo_events; | |
307 | atomic_t numainfo_updating; | |
308 | #endif | |
309 | ||
310 | #ifdef CONFIG_CGROUP_WRITEBACK | |
311 | struct list_head cgwb_list; | |
312 | struct wb_domain cgwb_domain; | |
313 | #endif | |
314 | ||
315 | /* List of events which userspace want to receive */ | |
316 | struct list_head event_list; | |
317 | spinlock_t event_list_lock; | |
318 | ||
319 | struct mem_cgroup_per_node *nodeinfo[0]; | |
320 | /* WARNING: nodeinfo must be the last member here */ | |
321 | }; | |
7d828602 | 322 | |
a983b5eb JW |
323 | /* |
324 | * size of first charge trial. "32" comes from vmscan.c's magic value. | |
325 | * TODO: maybe necessary to use big numbers in big irons. | |
326 | */ | |
327 | #define MEMCG_CHARGE_BATCH 32U | |
328 | ||
7d828602 | 329 | extern struct mem_cgroup *root_mem_cgroup; |
56161634 | 330 | |
dfd2f10c KT |
331 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
332 | { | |
333 | return (memcg == root_mem_cgroup); | |
334 | } | |
335 | ||
23047a96 JW |
336 | static inline bool mem_cgroup_disabled(void) |
337 | { | |
338 | return !cgroup_subsys_enabled(memory_cgrp_subsys); | |
339 | } | |
340 | ||
bf8d5d52 RG |
341 | enum mem_cgroup_protection mem_cgroup_protected(struct mem_cgroup *root, |
342 | struct mem_cgroup *memcg); | |
241994ed | 343 | |
00501b53 | 344 | int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
f627c2f5 KS |
345 | gfp_t gfp_mask, struct mem_cgroup **memcgp, |
346 | bool compound); | |
2cf85583 TH |
347 | int mem_cgroup_try_charge_delay(struct page *page, struct mm_struct *mm, |
348 | gfp_t gfp_mask, struct mem_cgroup **memcgp, | |
349 | bool compound); | |
00501b53 | 350 | void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg, |
f627c2f5 KS |
351 | bool lrucare, bool compound); |
352 | void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg, | |
353 | bool compound); | |
0a31bc97 | 354 | void mem_cgroup_uncharge(struct page *page); |
747db954 | 355 | void mem_cgroup_uncharge_list(struct list_head *page_list); |
569b846d | 356 | |
6a93ca8f | 357 | void mem_cgroup_migrate(struct page *oldpage, struct page *newpage); |
569b846d | 358 | |
ef8f2327 MG |
359 | static struct mem_cgroup_per_node * |
360 | mem_cgroup_nodeinfo(struct mem_cgroup *memcg, int nid) | |
55779ec7 | 361 | { |
ef8f2327 | 362 | return memcg->nodeinfo[nid]; |
55779ec7 JW |
363 | } |
364 | ||
365 | /** | |
a9dd0a83 MG |
366 | * mem_cgroup_lruvec - get the lru list vector for a node or a memcg zone |
367 | * @node: node of the wanted lruvec | |
55779ec7 JW |
368 | * @memcg: memcg of the wanted lruvec |
369 | * | |
a9dd0a83 MG |
370 | * Returns the lru list vector holding pages for a given @node or a given |
371 | * @memcg and @zone. This can be the node lruvec, if the memory controller | |
55779ec7 JW |
372 | * is disabled. |
373 | */ | |
a9dd0a83 | 374 | static inline struct lruvec *mem_cgroup_lruvec(struct pglist_data *pgdat, |
ef8f2327 | 375 | struct mem_cgroup *memcg) |
55779ec7 | 376 | { |
ef8f2327 | 377 | struct mem_cgroup_per_node *mz; |
55779ec7 JW |
378 | struct lruvec *lruvec; |
379 | ||
380 | if (mem_cgroup_disabled()) { | |
a9dd0a83 | 381 | lruvec = node_lruvec(pgdat); |
55779ec7 JW |
382 | goto out; |
383 | } | |
384 | ||
ef8f2327 | 385 | mz = mem_cgroup_nodeinfo(memcg, pgdat->node_id); |
55779ec7 JW |
386 | lruvec = &mz->lruvec; |
387 | out: | |
388 | /* | |
389 | * Since a node can be onlined after the mem_cgroup was created, | |
599d0c95 | 390 | * we have to be prepared to initialize lruvec->pgdat here; |
55779ec7 JW |
391 | * and if offlined then reonlined, we need to reinitialize it. |
392 | */ | |
ef8f2327 MG |
393 | if (unlikely(lruvec->pgdat != pgdat)) |
394 | lruvec->pgdat = pgdat; | |
55779ec7 JW |
395 | return lruvec; |
396 | } | |
397 | ||
599d0c95 | 398 | struct lruvec *mem_cgroup_page_lruvec(struct page *, struct pglist_data *); |
c9b0ed51 | 399 | |
2314b42d | 400 | bool task_in_mem_cgroup(struct task_struct *task, struct mem_cgroup *memcg); |
64219994 | 401 | struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
e993d905 | 402 | |
d46eb14b SB |
403 | struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm); |
404 | ||
f745c6f5 SB |
405 | struct mem_cgroup *get_mem_cgroup_from_page(struct page *page); |
406 | ||
33398cf2 MH |
407 | static inline |
408 | struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){ | |
409 | return css ? container_of(css, struct mem_cgroup, css) : NULL; | |
410 | } | |
411 | ||
dc0b5864 RG |
412 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
413 | { | |
d46eb14b SB |
414 | if (memcg) |
415 | css_put(&memcg->css); | |
dc0b5864 RG |
416 | } |
417 | ||
8e8ae645 JW |
418 | #define mem_cgroup_from_counter(counter, member) \ |
419 | container_of(counter, struct mem_cgroup, member) | |
420 | ||
33398cf2 MH |
421 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
422 | struct mem_cgroup *, | |
423 | struct mem_cgroup_reclaim_cookie *); | |
424 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); | |
7c5f64f8 VD |
425 | int mem_cgroup_scan_tasks(struct mem_cgroup *, |
426 | int (*)(struct task_struct *, void *), void *); | |
33398cf2 | 427 | |
23047a96 JW |
428 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
429 | { | |
430 | if (mem_cgroup_disabled()) | |
431 | return 0; | |
432 | ||
73f576c0 | 433 | return memcg->id.id; |
23047a96 | 434 | } |
73f576c0 | 435 | struct mem_cgroup *mem_cgroup_from_id(unsigned short id); |
23047a96 | 436 | |
aa9694bb CD |
437 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
438 | { | |
439 | return mem_cgroup_from_css(seq_css(m)); | |
440 | } | |
441 | ||
2262185c RG |
442 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
443 | { | |
444 | struct mem_cgroup_per_node *mz; | |
445 | ||
446 | if (mem_cgroup_disabled()) | |
447 | return NULL; | |
448 | ||
449 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
450 | return mz->memcg; | |
451 | } | |
452 | ||
8e8ae645 JW |
453 | /** |
454 | * parent_mem_cgroup - find the accounting parent of a memcg | |
455 | * @memcg: memcg whose parent to find | |
456 | * | |
457 | * Returns the parent memcg, or NULL if this is the root or the memory | |
458 | * controller is in legacy no-hierarchy mode. | |
459 | */ | |
460 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) | |
461 | { | |
462 | if (!memcg->memory.parent) | |
463 | return NULL; | |
464 | return mem_cgroup_from_counter(memcg->memory.parent, memory); | |
465 | } | |
466 | ||
33398cf2 MH |
467 | static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, |
468 | struct mem_cgroup *root) | |
469 | { | |
470 | if (root == memcg) | |
471 | return true; | |
472 | if (!root->use_hierarchy) | |
473 | return false; | |
474 | return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup); | |
475 | } | |
e1aab161 | 476 | |
2314b42d JW |
477 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
478 | struct mem_cgroup *memcg) | |
2e4d4091 | 479 | { |
587af308 | 480 | struct mem_cgroup *task_memcg; |
413918bb | 481 | bool match = false; |
c3ac9a8a | 482 | |
2e4d4091 | 483 | rcu_read_lock(); |
587af308 | 484 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
413918bb | 485 | if (task_memcg) |
2314b42d | 486 | match = mem_cgroup_is_descendant(task_memcg, memcg); |
2e4d4091 | 487 | rcu_read_unlock(); |
c3ac9a8a | 488 | return match; |
2e4d4091 | 489 | } |
8a9f3ccd | 490 | |
64219994 | 491 | struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page); |
2fc04524 | 492 | ino_t page_cgroup_ino(struct page *page); |
d324236b | 493 | |
eb01aaab VD |
494 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
495 | { | |
496 | if (mem_cgroup_disabled()) | |
497 | return true; | |
498 | return !!(memcg->css.flags & CSS_ONLINE); | |
499 | } | |
500 | ||
58ae83db KH |
501 | /* |
502 | * For memory reclaim. | |
503 | */ | |
889976db | 504 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
33398cf2 MH |
505 | |
506 | void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, | |
b4536f0c | 507 | int zid, int nr_pages); |
33398cf2 | 508 | |
b4536f0c MH |
509 | static inline |
510 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
511 | enum lru_list lru, int zone_idx) | |
512 | { | |
513 | struct mem_cgroup_per_node *mz; | |
514 | ||
515 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
516 | return mz->lru_zone_size[zone_idx][lru]; | |
33398cf2 MH |
517 | } |
518 | ||
b23afb93 TH |
519 | void mem_cgroup_handle_over_high(void); |
520 | ||
bbec2e15 | 521 | unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg); |
7c5f64f8 | 522 | |
f0c867d9 | 523 | void mem_cgroup_print_oom_context(struct mem_cgroup *memcg, |
64219994 | 524 | struct task_struct *p); |
58ae83db | 525 | |
f0c867d9 | 526 | void mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg); |
527 | ||
29ef680a | 528 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 | 529 | { |
29ef680a MH |
530 | WARN_ON(current->in_user_fault); |
531 | current->in_user_fault = 1; | |
519e5247 JW |
532 | } |
533 | ||
29ef680a | 534 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 | 535 | { |
29ef680a MH |
536 | WARN_ON(!current->in_user_fault); |
537 | current->in_user_fault = 0; | |
519e5247 JW |
538 | } |
539 | ||
3812c8c8 JW |
540 | static inline bool task_in_memcg_oom(struct task_struct *p) |
541 | { | |
626ebc41 | 542 | return p->memcg_in_oom; |
3812c8c8 JW |
543 | } |
544 | ||
49426420 | 545 | bool mem_cgroup_oom_synchronize(bool wait); |
3d8b38eb RG |
546 | struct mem_cgroup *mem_cgroup_get_oom_group(struct task_struct *victim, |
547 | struct mem_cgroup *oom_domain); | |
548 | void mem_cgroup_print_oom_group(struct mem_cgroup *memcg); | |
3812c8c8 | 549 | |
c255a458 | 550 | #ifdef CONFIG_MEMCG_SWAP |
c077719b KH |
551 | extern int do_swap_account; |
552 | #endif | |
f8d66542 | 553 | |
739f79fc JW |
554 | struct mem_cgroup *lock_page_memcg(struct page *page); |
555 | void __unlock_page_memcg(struct mem_cgroup *memcg); | |
62cccb8c | 556 | void unlock_page_memcg(struct page *page); |
d7365e78 | 557 | |
42a30035 JW |
558 | /* |
559 | * idx can be of type enum memcg_stat_item or node_stat_item. | |
560 | * Keep in sync with memcg_exact_page_state(). | |
561 | */ | |
562 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx) | |
563 | { | |
564 | long x = atomic_long_read(&memcg->vmstats[idx]); | |
565 | #ifdef CONFIG_SMP | |
566 | if (x < 0) | |
567 | x = 0; | |
568 | #endif | |
569 | return x; | |
570 | } | |
571 | ||
0b3d6e6f GT |
572 | /* |
573 | * idx can be of type enum memcg_stat_item or node_stat_item. | |
574 | * Keep in sync with memcg_exact_page_state(). | |
575 | */ | |
205b20cc JW |
576 | static inline unsigned long memcg_page_state_local(struct mem_cgroup *memcg, |
577 | int idx) | |
2a2e4885 | 578 | { |
42a30035 | 579 | long x = atomic_long_read(&memcg->vmstats_local[idx]); |
a983b5eb JW |
580 | #ifdef CONFIG_SMP |
581 | if (x < 0) | |
582 | x = 0; | |
583 | #endif | |
584 | return x; | |
2a2e4885 JW |
585 | } |
586 | ||
db9adbcb | 587 | void __mod_memcg_state(struct mem_cgroup *memcg, int idx, int val); |
2a2e4885 | 588 | |
04fecbf5 | 589 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 590 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 591 | int idx, int val) |
2a2e4885 | 592 | { |
c3cc3911 JW |
593 | unsigned long flags; |
594 | ||
595 | local_irq_save(flags); | |
a983b5eb | 596 | __mod_memcg_state(memcg, idx, val); |
c3cc3911 | 597 | local_irq_restore(flags); |
2a2e4885 JW |
598 | } |
599 | ||
33398cf2 | 600 | /** |
ccda7f43 | 601 | * mod_memcg_page_state - update page state statistics |
62cccb8c | 602 | * @page: the page |
33398cf2 MH |
603 | * @idx: page state item to account |
604 | * @val: number of pages (positive or negative) | |
605 | * | |
fdf1cdb9 JW |
606 | * The @page must be locked or the caller must use lock_page_memcg() |
607 | * to prevent double accounting when the page is concurrently being | |
608 | * moved to another memcg: | |
81f8c3a4 | 609 | * |
fdf1cdb9 | 610 | * lock_page(page) or lock_page_memcg(page) |
81f8c3a4 | 611 | * if (TestClearPageState(page)) |
ccda7f43 | 612 | * mod_memcg_page_state(page, state, -1); |
fdf1cdb9 | 613 | * unlock_page(page) or unlock_page_memcg(page) |
2a2e4885 JW |
614 | * |
615 | * Kernel pages are an exception to this, since they'll never move. | |
33398cf2 | 616 | */ |
00f3ca2c | 617 | static inline void __mod_memcg_page_state(struct page *page, |
04fecbf5 | 618 | int idx, int val) |
00f3ca2c JW |
619 | { |
620 | if (page->mem_cgroup) | |
621 | __mod_memcg_state(page->mem_cgroup, idx, val); | |
622 | } | |
623 | ||
ccda7f43 | 624 | static inline void mod_memcg_page_state(struct page *page, |
04fecbf5 | 625 | int idx, int val) |
33398cf2 | 626 | { |
62cccb8c | 627 | if (page->mem_cgroup) |
ccda7f43 | 628 | mod_memcg_state(page->mem_cgroup, idx, val); |
33398cf2 MH |
629 | } |
630 | ||
42a30035 JW |
631 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
632 | enum node_stat_item idx) | |
633 | { | |
634 | struct mem_cgroup_per_node *pn; | |
635 | long x; | |
636 | ||
637 | if (mem_cgroup_disabled()) | |
638 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
639 | ||
640 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
641 | x = atomic_long_read(&pn->lruvec_stat[idx]); | |
642 | #ifdef CONFIG_SMP | |
643 | if (x < 0) | |
644 | x = 0; | |
645 | #endif | |
646 | return x; | |
647 | } | |
648 | ||
205b20cc JW |
649 | static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
650 | enum node_stat_item idx) | |
2a7106f2 | 651 | { |
00f3ca2c | 652 | struct mem_cgroup_per_node *pn; |
a983b5eb | 653 | long x; |
00f3ca2c JW |
654 | |
655 | if (mem_cgroup_disabled()) | |
656 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
657 | ||
658 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
42a30035 | 659 | x = atomic_long_read(&pn->lruvec_stat_local[idx]); |
a983b5eb JW |
660 | #ifdef CONFIG_SMP |
661 | if (x < 0) | |
662 | x = 0; | |
663 | #endif | |
664 | return x; | |
2a7106f2 GT |
665 | } |
666 | ||
db9adbcb JW |
667 | void __mod_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx, |
668 | int val); | |
00f3ca2c JW |
669 | |
670 | static inline void mod_lruvec_state(struct lruvec *lruvec, | |
671 | enum node_stat_item idx, int val) | |
672 | { | |
c3cc3911 JW |
673 | unsigned long flags; |
674 | ||
675 | local_irq_save(flags); | |
28454265 | 676 | __mod_lruvec_state(lruvec, idx, val); |
c3cc3911 | 677 | local_irq_restore(flags); |
00f3ca2c JW |
678 | } |
679 | ||
680 | static inline void __mod_lruvec_page_state(struct page *page, | |
681 | enum node_stat_item idx, int val) | |
682 | { | |
28454265 JW |
683 | pg_data_t *pgdat = page_pgdat(page); |
684 | struct lruvec *lruvec; | |
00f3ca2c | 685 | |
28454265 JW |
686 | /* Untracked pages have no memcg, no lruvec. Update only the node */ |
687 | if (!page->mem_cgroup) { | |
688 | __mod_node_page_state(pgdat, idx, val); | |
00f3ca2c | 689 | return; |
28454265 JW |
690 | } |
691 | ||
692 | lruvec = mem_cgroup_lruvec(pgdat, page->mem_cgroup); | |
693 | __mod_lruvec_state(lruvec, idx, val); | |
00f3ca2c JW |
694 | } |
695 | ||
696 | static inline void mod_lruvec_page_state(struct page *page, | |
697 | enum node_stat_item idx, int val) | |
698 | { | |
c3cc3911 JW |
699 | unsigned long flags; |
700 | ||
701 | local_irq_save(flags); | |
28454265 | 702 | __mod_lruvec_page_state(page, idx, val); |
c3cc3911 | 703 | local_irq_restore(flags); |
2a7106f2 GT |
704 | } |
705 | ||
ef8f2327 | 706 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
707 | gfp_t gfp_mask, |
708 | unsigned long *total_scanned); | |
a63d83f4 | 709 | |
db9adbcb JW |
710 | void __count_memcg_events(struct mem_cgroup *memcg, enum vm_event_item idx, |
711 | unsigned long count); | |
c9019e9b | 712 | |
2262185c | 713 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
e27be240 JW |
714 | enum vm_event_item idx, |
715 | unsigned long count) | |
2262185c | 716 | { |
c3cc3911 JW |
717 | unsigned long flags; |
718 | ||
719 | local_irq_save(flags); | |
a983b5eb | 720 | __count_memcg_events(memcg, idx, count); |
c3cc3911 | 721 | local_irq_restore(flags); |
2262185c RG |
722 | } |
723 | ||
724 | static inline void count_memcg_page_event(struct page *page, | |
e27be240 | 725 | enum vm_event_item idx) |
2262185c RG |
726 | { |
727 | if (page->mem_cgroup) | |
728 | count_memcg_events(page->mem_cgroup, idx, 1); | |
729 | } | |
730 | ||
731 | static inline void count_memcg_event_mm(struct mm_struct *mm, | |
732 | enum vm_event_item idx) | |
68ae564b | 733 | { |
33398cf2 MH |
734 | struct mem_cgroup *memcg; |
735 | ||
68ae564b DR |
736 | if (mem_cgroup_disabled()) |
737 | return; | |
33398cf2 MH |
738 | |
739 | rcu_read_lock(); | |
740 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
fe6bdfc8 | 741 | if (likely(memcg)) |
c9019e9b | 742 | count_memcg_events(memcg, idx, 1); |
33398cf2 | 743 | rcu_read_unlock(); |
68ae564b | 744 | } |
c9019e9b | 745 | |
e27be240 JW |
746 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
747 | enum memcg_memory_event event) | |
c9019e9b | 748 | { |
e27be240 | 749 | atomic_long_inc(&memcg->memory_events[event]); |
c9019e9b JW |
750 | cgroup_file_notify(&memcg->events_file); |
751 | } | |
752 | ||
fe6bdfc8 RG |
753 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
754 | enum memcg_memory_event event) | |
755 | { | |
756 | struct mem_cgroup *memcg; | |
757 | ||
758 | if (mem_cgroup_disabled()) | |
759 | return; | |
760 | ||
761 | rcu_read_lock(); | |
762 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
763 | if (likely(memcg)) | |
764 | memcg_memory_event(memcg, event); | |
765 | rcu_read_unlock(); | |
766 | } | |
767 | ||
ca3e0214 | 768 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
e94c8a9c | 769 | void mem_cgroup_split_huge_fixup(struct page *head); |
ca3e0214 KH |
770 | #endif |
771 | ||
c255a458 | 772 | #else /* CONFIG_MEMCG */ |
23047a96 JW |
773 | |
774 | #define MEM_CGROUP_ID_SHIFT 0 | |
775 | #define MEM_CGROUP_ID_MAX 0 | |
776 | ||
7a81b88c KH |
777 | struct mem_cgroup; |
778 | ||
dfd2f10c KT |
779 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
780 | { | |
781 | return true; | |
782 | } | |
783 | ||
23047a96 JW |
784 | static inline bool mem_cgroup_disabled(void) |
785 | { | |
786 | return true; | |
787 | } | |
788 | ||
e27be240 JW |
789 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
790 | enum memcg_memory_event event) | |
241994ed JW |
791 | { |
792 | } | |
793 | ||
fe6bdfc8 RG |
794 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
795 | enum memcg_memory_event event) | |
796 | { | |
797 | } | |
798 | ||
bf8d5d52 RG |
799 | static inline enum mem_cgroup_protection mem_cgroup_protected( |
800 | struct mem_cgroup *root, struct mem_cgroup *memcg) | |
241994ed | 801 | { |
bf8d5d52 | 802 | return MEMCG_PROT_NONE; |
241994ed JW |
803 | } |
804 | ||
00501b53 JW |
805 | static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
806 | gfp_t gfp_mask, | |
f627c2f5 KS |
807 | struct mem_cgroup **memcgp, |
808 | bool compound) | |
7a81b88c | 809 | { |
00501b53 | 810 | *memcgp = NULL; |
7a81b88c KH |
811 | return 0; |
812 | } | |
813 | ||
2cf85583 TH |
814 | static inline int mem_cgroup_try_charge_delay(struct page *page, |
815 | struct mm_struct *mm, | |
816 | gfp_t gfp_mask, | |
817 | struct mem_cgroup **memcgp, | |
818 | bool compound) | |
819 | { | |
820 | *memcgp = NULL; | |
821 | return 0; | |
822 | } | |
823 | ||
00501b53 JW |
824 | static inline void mem_cgroup_commit_charge(struct page *page, |
825 | struct mem_cgroup *memcg, | |
f627c2f5 | 826 | bool lrucare, bool compound) |
7a81b88c KH |
827 | { |
828 | } | |
829 | ||
00501b53 | 830 | static inline void mem_cgroup_cancel_charge(struct page *page, |
f627c2f5 KS |
831 | struct mem_cgroup *memcg, |
832 | bool compound) | |
7a81b88c KH |
833 | { |
834 | } | |
835 | ||
0a31bc97 | 836 | static inline void mem_cgroup_uncharge(struct page *page) |
569b846d KH |
837 | { |
838 | } | |
839 | ||
747db954 | 840 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
8a9f3ccd BS |
841 | { |
842 | } | |
843 | ||
6a93ca8f | 844 | static inline void mem_cgroup_migrate(struct page *old, struct page *new) |
69029cd5 KH |
845 | { |
846 | } | |
847 | ||
a9dd0a83 | 848 | static inline struct lruvec *mem_cgroup_lruvec(struct pglist_data *pgdat, |
ef8f2327 | 849 | struct mem_cgroup *memcg) |
08e552c6 | 850 | { |
a9dd0a83 | 851 | return node_lruvec(pgdat); |
08e552c6 KH |
852 | } |
853 | ||
fa9add64 | 854 | static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, |
599d0c95 | 855 | struct pglist_data *pgdat) |
66e1707b | 856 | { |
599d0c95 | 857 | return &pgdat->lruvec; |
66e1707b BS |
858 | } |
859 | ||
587af308 | 860 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
c0ff4b85 | 861 | struct mem_cgroup *memcg) |
bed7161a | 862 | { |
587af308 | 863 | return true; |
bed7161a BS |
864 | } |
865 | ||
ffbdccf5 DR |
866 | static inline bool task_in_mem_cgroup(struct task_struct *task, |
867 | const struct mem_cgroup *memcg) | |
4c4a2214 | 868 | { |
ffbdccf5 | 869 | return true; |
4c4a2214 DR |
870 | } |
871 | ||
d46eb14b SB |
872 | static inline struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm) |
873 | { | |
874 | return NULL; | |
875 | } | |
876 | ||
f745c6f5 SB |
877 | static inline struct mem_cgroup *get_mem_cgroup_from_page(struct page *page) |
878 | { | |
879 | return NULL; | |
880 | } | |
881 | ||
dc0b5864 RG |
882 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
883 | { | |
884 | } | |
885 | ||
5660048c JW |
886 | static inline struct mem_cgroup * |
887 | mem_cgroup_iter(struct mem_cgroup *root, | |
888 | struct mem_cgroup *prev, | |
889 | struct mem_cgroup_reclaim_cookie *reclaim) | |
890 | { | |
891 | return NULL; | |
892 | } | |
893 | ||
894 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
895 | struct mem_cgroup *prev) | |
896 | { | |
897 | } | |
898 | ||
7c5f64f8 VD |
899 | static inline int mem_cgroup_scan_tasks(struct mem_cgroup *memcg, |
900 | int (*fn)(struct task_struct *, void *), void *arg) | |
901 | { | |
902 | return 0; | |
903 | } | |
904 | ||
23047a96 | 905 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
f8d66542 | 906 | { |
23047a96 JW |
907 | return 0; |
908 | } | |
909 | ||
910 | static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id) | |
911 | { | |
912 | WARN_ON_ONCE(id); | |
913 | /* XXX: This should always return root_mem_cgroup */ | |
914 | return NULL; | |
f8d66542 | 915 | } |
a636b327 | 916 | |
aa9694bb CD |
917 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
918 | { | |
919 | return NULL; | |
920 | } | |
921 | ||
2262185c RG |
922 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
923 | { | |
924 | return NULL; | |
925 | } | |
926 | ||
eb01aaab | 927 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
14797e23 | 928 | { |
13308ca9 | 929 | return true; |
14797e23 KM |
930 | } |
931 | ||
b4536f0c MH |
932 | static inline |
933 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
934 | enum lru_list lru, int zone_idx) | |
935 | { | |
936 | return 0; | |
937 | } | |
a3d8e054 | 938 | |
bbec2e15 | 939 | static inline unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg) |
7c5f64f8 VD |
940 | { |
941 | return 0; | |
942 | } | |
943 | ||
e222432b | 944 | static inline void |
f0c867d9 | 945 | mem_cgroup_print_oom_context(struct mem_cgroup *memcg, struct task_struct *p) |
946 | { | |
947 | } | |
948 | ||
949 | static inline void | |
950 | mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg) | |
e222432b BS |
951 | { |
952 | } | |
953 | ||
739f79fc JW |
954 | static inline struct mem_cgroup *lock_page_memcg(struct page *page) |
955 | { | |
956 | return NULL; | |
957 | } | |
958 | ||
959 | static inline void __unlock_page_memcg(struct mem_cgroup *memcg) | |
89c06bd5 KH |
960 | { |
961 | } | |
962 | ||
62cccb8c | 963 | static inline void unlock_page_memcg(struct page *page) |
89c06bd5 KH |
964 | { |
965 | } | |
966 | ||
b23afb93 TH |
967 | static inline void mem_cgroup_handle_over_high(void) |
968 | { | |
969 | } | |
970 | ||
29ef680a | 971 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 JW |
972 | { |
973 | } | |
974 | ||
29ef680a | 975 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 JW |
976 | { |
977 | } | |
978 | ||
3812c8c8 JW |
979 | static inline bool task_in_memcg_oom(struct task_struct *p) |
980 | { | |
981 | return false; | |
982 | } | |
983 | ||
49426420 | 984 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
3812c8c8 JW |
985 | { |
986 | return false; | |
987 | } | |
988 | ||
3d8b38eb RG |
989 | static inline struct mem_cgroup *mem_cgroup_get_oom_group( |
990 | struct task_struct *victim, struct mem_cgroup *oom_domain) | |
991 | { | |
992 | return NULL; | |
993 | } | |
994 | ||
995 | static inline void mem_cgroup_print_oom_group(struct mem_cgroup *memcg) | |
996 | { | |
997 | } | |
998 | ||
42a30035 JW |
999 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx) |
1000 | { | |
1001 | return 0; | |
1002 | } | |
1003 | ||
205b20cc JW |
1004 | static inline unsigned long memcg_page_state_local(struct mem_cgroup *memcg, |
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 | ||
42a30035 JW |
1034 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
1035 | enum node_stat_item idx) | |
1036 | { | |
1037 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
1038 | } | |
1039 | ||
205b20cc JW |
1040 | static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
1041 | enum node_stat_item idx) | |
2a7106f2 | 1042 | { |
00f3ca2c | 1043 | return node_page_state(lruvec_pgdat(lruvec), idx); |
2a7106f2 GT |
1044 | } |
1045 | ||
00f3ca2c JW |
1046 | static inline void __mod_lruvec_state(struct lruvec *lruvec, |
1047 | enum node_stat_item idx, int val) | |
d69b042f | 1048 | { |
00f3ca2c JW |
1049 | __mod_node_page_state(lruvec_pgdat(lruvec), idx, val); |
1050 | } | |
1051 | ||
1052 | static inline void mod_lruvec_state(struct lruvec *lruvec, | |
1053 | enum node_stat_item idx, int val) | |
1054 | { | |
1055 | mod_node_page_state(lruvec_pgdat(lruvec), 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); | |
1062 | } | |
1063 | ||
1064 | static inline void mod_lruvec_page_state(struct page *page, | |
1065 | enum node_stat_item idx, int val) | |
1066 | { | |
1067 | mod_node_page_state(page_pgdat(page), idx, val); | |
d69b042f BS |
1068 | } |
1069 | ||
4e416953 | 1070 | static inline |
ef8f2327 | 1071 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
1072 | gfp_t gfp_mask, |
1073 | unsigned long *total_scanned) | |
4e416953 | 1074 | { |
0608f43d | 1075 | return 0; |
4e416953 BS |
1076 | } |
1077 | ||
e94c8a9c | 1078 | static inline void mem_cgroup_split_huge_fixup(struct page *head) |
ca3e0214 KH |
1079 | { |
1080 | } | |
1081 | ||
2262185c RG |
1082 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
1083 | enum vm_event_item idx, | |
1084 | unsigned long count) | |
1085 | { | |
1086 | } | |
1087 | ||
9851ac13 KT |
1088 | static inline void __count_memcg_events(struct mem_cgroup *memcg, |
1089 | enum vm_event_item idx, | |
1090 | unsigned long count) | |
1091 | { | |
1092 | } | |
1093 | ||
2262185c | 1094 | static inline void count_memcg_page_event(struct page *page, |
04fecbf5 | 1095 | int idx) |
2262185c RG |
1096 | { |
1097 | } | |
1098 | ||
456f998e | 1099 | static inline |
2262185c | 1100 | void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx) |
456f998e YH |
1101 | { |
1102 | } | |
c255a458 | 1103 | #endif /* CONFIG_MEMCG */ |
78fb7466 | 1104 | |
04fecbf5 | 1105 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1106 | static inline void __inc_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1107 | int idx) |
00f3ca2c JW |
1108 | { |
1109 | __mod_memcg_state(memcg, idx, 1); | |
1110 | } | |
1111 | ||
04fecbf5 | 1112 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1113 | static inline void __dec_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1114 | int idx) |
00f3ca2c JW |
1115 | { |
1116 | __mod_memcg_state(memcg, idx, -1); | |
1117 | } | |
1118 | ||
04fecbf5 | 1119 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1120 | static inline void __inc_memcg_page_state(struct page *page, |
04fecbf5 | 1121 | int idx) |
00f3ca2c JW |
1122 | { |
1123 | __mod_memcg_page_state(page, idx, 1); | |
1124 | } | |
1125 | ||
04fecbf5 | 1126 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1127 | static inline void __dec_memcg_page_state(struct page *page, |
04fecbf5 | 1128 | int idx) |
00f3ca2c JW |
1129 | { |
1130 | __mod_memcg_page_state(page, idx, -1); | |
1131 | } | |
1132 | ||
1133 | static inline void __inc_lruvec_state(struct lruvec *lruvec, | |
1134 | enum node_stat_item idx) | |
1135 | { | |
1136 | __mod_lruvec_state(lruvec, idx, 1); | |
1137 | } | |
1138 | ||
1139 | static inline void __dec_lruvec_state(struct lruvec *lruvec, | |
1140 | enum node_stat_item idx) | |
1141 | { | |
1142 | __mod_lruvec_state(lruvec, idx, -1); | |
1143 | } | |
1144 | ||
1145 | static inline void __inc_lruvec_page_state(struct page *page, | |
1146 | enum node_stat_item idx) | |
1147 | { | |
1148 | __mod_lruvec_page_state(page, idx, 1); | |
1149 | } | |
1150 | ||
1151 | static inline void __dec_lruvec_page_state(struct page *page, | |
1152 | enum node_stat_item idx) | |
1153 | { | |
1154 | __mod_lruvec_page_state(page, idx, -1); | |
1155 | } | |
1156 | ||
04fecbf5 | 1157 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1158 | static inline void inc_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1159 | int idx) |
00f3ca2c JW |
1160 | { |
1161 | mod_memcg_state(memcg, idx, 1); | |
1162 | } | |
1163 | ||
04fecbf5 | 1164 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1165 | static inline void dec_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1166 | int idx) |
00f3ca2c JW |
1167 | { |
1168 | mod_memcg_state(memcg, idx, -1); | |
1169 | } | |
1170 | ||
04fecbf5 | 1171 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1172 | static inline void inc_memcg_page_state(struct page *page, |
04fecbf5 | 1173 | int idx) |
00f3ca2c JW |
1174 | { |
1175 | mod_memcg_page_state(page, idx, 1); | |
1176 | } | |
1177 | ||
04fecbf5 | 1178 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1179 | static inline void dec_memcg_page_state(struct page *page, |
04fecbf5 | 1180 | int idx) |
00f3ca2c JW |
1181 | { |
1182 | mod_memcg_page_state(page, idx, -1); | |
1183 | } | |
1184 | ||
1185 | static inline void inc_lruvec_state(struct lruvec *lruvec, | |
1186 | enum node_stat_item idx) | |
1187 | { | |
1188 | mod_lruvec_state(lruvec, idx, 1); | |
1189 | } | |
1190 | ||
1191 | static inline void dec_lruvec_state(struct lruvec *lruvec, | |
1192 | enum node_stat_item idx) | |
1193 | { | |
1194 | mod_lruvec_state(lruvec, idx, -1); | |
1195 | } | |
1196 | ||
1197 | static inline void inc_lruvec_page_state(struct page *page, | |
1198 | enum node_stat_item idx) | |
1199 | { | |
1200 | mod_lruvec_page_state(page, idx, 1); | |
1201 | } | |
1202 | ||
1203 | static inline void dec_lruvec_page_state(struct page *page, | |
1204 | enum node_stat_item idx) | |
1205 | { | |
1206 | mod_lruvec_page_state(page, idx, -1); | |
1207 | } | |
1208 | ||
52ebea74 | 1209 | #ifdef CONFIG_CGROUP_WRITEBACK |
841710aa | 1210 | |
841710aa | 1211 | struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb); |
c5edf9cd TH |
1212 | void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages, |
1213 | unsigned long *pheadroom, unsigned long *pdirty, | |
1214 | unsigned long *pwriteback); | |
841710aa TH |
1215 | |
1216 | #else /* CONFIG_CGROUP_WRITEBACK */ | |
1217 | ||
1218 | static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb) | |
1219 | { | |
1220 | return NULL; | |
1221 | } | |
1222 | ||
c2aa723a | 1223 | static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb, |
c5edf9cd TH |
1224 | unsigned long *pfilepages, |
1225 | unsigned long *pheadroom, | |
c2aa723a TH |
1226 | unsigned long *pdirty, |
1227 | unsigned long *pwriteback) | |
1228 | { | |
1229 | } | |
1230 | ||
841710aa | 1231 | #endif /* CONFIG_CGROUP_WRITEBACK */ |
52ebea74 | 1232 | |
e1aab161 | 1233 | struct sock; |
baac50bb JW |
1234 | bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); |
1235 | void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); | |
d886f4e4 | 1236 | #ifdef CONFIG_MEMCG |
ef12947c JW |
1237 | extern struct static_key_false memcg_sockets_enabled_key; |
1238 | #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key) | |
2d758073 JW |
1239 | void mem_cgroup_sk_alloc(struct sock *sk); |
1240 | void mem_cgroup_sk_free(struct sock *sk); | |
baac50bb | 1241 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c | 1242 | { |
0db15298 | 1243 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && memcg->tcpmem_pressure) |
8e8ae645 | 1244 | return true; |
8e8ae645 JW |
1245 | do { |
1246 | if (time_before(jiffies, memcg->socket_pressure)) | |
1247 | return true; | |
1248 | } while ((memcg = parent_mem_cgroup(memcg))); | |
1249 | return false; | |
e805605c JW |
1250 | } |
1251 | #else | |
80e95fe0 | 1252 | #define mem_cgroup_sockets_enabled 0 |
2d758073 JW |
1253 | static inline void mem_cgroup_sk_alloc(struct sock *sk) { }; |
1254 | static inline void mem_cgroup_sk_free(struct sock *sk) { }; | |
baac50bb | 1255 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c JW |
1256 | { |
1257 | return false; | |
1258 | } | |
1259 | #endif | |
7ae1e1d0 | 1260 | |
45264778 VD |
1261 | struct kmem_cache *memcg_kmem_get_cache(struct kmem_cache *cachep); |
1262 | void memcg_kmem_put_cache(struct kmem_cache *cachep); | |
9b6f7e16 RG |
1263 | |
1264 | #ifdef CONFIG_MEMCG_KMEM | |
60cd4bcd SB |
1265 | int __memcg_kmem_charge(struct page *page, gfp_t gfp, int order); |
1266 | void __memcg_kmem_uncharge(struct page *page, int order); | |
1267 | int __memcg_kmem_charge_memcg(struct page *page, gfp_t gfp, int order, | |
1268 | struct mem_cgroup *memcg); | |
45264778 | 1269 | |
ef12947c | 1270 | extern struct static_key_false memcg_kmem_enabled_key; |
17cc4dfe | 1271 | extern struct workqueue_struct *memcg_kmem_cache_wq; |
749c5415 | 1272 | |
dbcf73e2 | 1273 | extern int memcg_nr_cache_ids; |
64219994 MH |
1274 | void memcg_get_cache_ids(void); |
1275 | void memcg_put_cache_ids(void); | |
ebe945c2 GC |
1276 | |
1277 | /* | |
1278 | * Helper macro to loop through all memcg-specific caches. Callers must still | |
1279 | * check if the cache is valid (it is either valid or NULL). | |
1280 | * the slab_mutex must be held when looping through those caches | |
1281 | */ | |
749c5415 | 1282 | #define for_each_memcg_cache_index(_idx) \ |
dbcf73e2 | 1283 | for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++) |
749c5415 | 1284 | |
7ae1e1d0 GC |
1285 | static inline bool memcg_kmem_enabled(void) |
1286 | { | |
ef12947c | 1287 | return static_branch_unlikely(&memcg_kmem_enabled_key); |
7ae1e1d0 GC |
1288 | } |
1289 | ||
60cd4bcd SB |
1290 | static inline int memcg_kmem_charge(struct page *page, gfp_t gfp, int order) |
1291 | { | |
1292 | if (memcg_kmem_enabled()) | |
1293 | return __memcg_kmem_charge(page, gfp, order); | |
1294 | return 0; | |
1295 | } | |
1296 | ||
1297 | static inline void memcg_kmem_uncharge(struct page *page, int order) | |
1298 | { | |
1299 | if (memcg_kmem_enabled()) | |
1300 | __memcg_kmem_uncharge(page, order); | |
1301 | } | |
1302 | ||
1303 | static inline int memcg_kmem_charge_memcg(struct page *page, gfp_t gfp, | |
1304 | int order, struct mem_cgroup *memcg) | |
1305 | { | |
1306 | if (memcg_kmem_enabled()) | |
1307 | return __memcg_kmem_charge_memcg(page, gfp, order, memcg); | |
1308 | return 0; | |
1309 | } | |
33398cf2 | 1310 | /* |
9f706d68 | 1311 | * helper for accessing a memcg's index. It will be used as an index in the |
33398cf2 MH |
1312 | * child cache array in kmem_cache, and also to derive its name. This function |
1313 | * will return -1 when this is not a kmem-limited memcg. | |
1314 | */ | |
1315 | static inline int memcg_cache_id(struct mem_cgroup *memcg) | |
1316 | { | |
1317 | return memcg ? memcg->kmemcg_id : -1; | |
1318 | } | |
5722d094 | 1319 | |
0a4465d3 KT |
1320 | extern int memcg_expand_shrinker_maps(int new_id); |
1321 | ||
fae91d6d KT |
1322 | extern void memcg_set_shrinker_bit(struct mem_cgroup *memcg, |
1323 | int nid, int shrinker_id); | |
7ae1e1d0 | 1324 | #else |
9b6f7e16 RG |
1325 | |
1326 | static inline int memcg_kmem_charge(struct page *page, gfp_t gfp, int order) | |
1327 | { | |
1328 | return 0; | |
1329 | } | |
1330 | ||
1331 | static inline void memcg_kmem_uncharge(struct page *page, int order) | |
1332 | { | |
1333 | } | |
1334 | ||
60cd4bcd SB |
1335 | static inline int __memcg_kmem_charge(struct page *page, gfp_t gfp, int order) |
1336 | { | |
1337 | return 0; | |
1338 | } | |
1339 | ||
1340 | static inline void __memcg_kmem_uncharge(struct page *page, int order) | |
1341 | { | |
1342 | } | |
1343 | ||
749c5415 GC |
1344 | #define for_each_memcg_cache_index(_idx) \ |
1345 | for (; NULL; ) | |
1346 | ||
b9ce5ef4 GC |
1347 | static inline bool memcg_kmem_enabled(void) |
1348 | { | |
1349 | return false; | |
1350 | } | |
1351 | ||
2633d7a0 GC |
1352 | static inline int memcg_cache_id(struct mem_cgroup *memcg) |
1353 | { | |
1354 | return -1; | |
1355 | } | |
1356 | ||
05257a1a VD |
1357 | static inline void memcg_get_cache_ids(void) |
1358 | { | |
1359 | } | |
1360 | ||
1361 | static inline void memcg_put_cache_ids(void) | |
1362 | { | |
1363 | } | |
1364 | ||
fae91d6d KT |
1365 | static inline void memcg_set_shrinker_bit(struct mem_cgroup *memcg, |
1366 | int nid, int shrinker_id) { } | |
84c07d11 | 1367 | #endif /* CONFIG_MEMCG_KMEM */ |
127424c8 | 1368 | |
8cdea7c0 | 1369 | #endif /* _LINUX_MEMCONTROL_H */ |