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c942fddf | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
8cdea7c0 BS |
2 | /* memcontrol.h - Memory Controller |
3 | * | |
4 | * Copyright IBM Corporation, 2007 | |
5 | * Author Balbir Singh <balbir@linux.vnet.ibm.com> | |
6 | * | |
78fb7466 PE |
7 | * Copyright 2007 OpenVZ SWsoft Inc |
8 | * Author: Pavel Emelianov <xemul@openvz.org> | |
8cdea7c0 BS |
9 | */ |
10 | ||
11 | #ifndef _LINUX_MEMCONTROL_H | |
12 | #define _LINUX_MEMCONTROL_H | |
f8d66542 | 13 | #include <linux/cgroup.h> |
456f998e | 14 | #include <linux/vm_event_item.h> |
7ae1e1d0 | 15 | #include <linux/hardirq.h> |
a8964b9b | 16 | #include <linux/jump_label.h> |
33398cf2 MH |
17 | #include <linux/page_counter.h> |
18 | #include <linux/vmpressure.h> | |
19 | #include <linux/eventfd.h> | |
00f3ca2c JW |
20 | #include <linux/mm.h> |
21 | #include <linux/vmstat.h> | |
33398cf2 | 22 | #include <linux/writeback.h> |
fdf1cdb9 | 23 | #include <linux/page-flags.h> |
456f998e | 24 | |
78fb7466 | 25 | struct mem_cgroup; |
8697d331 BS |
26 | struct page; |
27 | struct mm_struct; | |
2633d7a0 | 28 | struct kmem_cache; |
78fb7466 | 29 | |
71cd3113 JW |
30 | /* Cgroup-specific page state, on top of universal node page state */ |
31 | enum memcg_stat_item { | |
32 | MEMCG_CACHE = NR_VM_NODE_STAT_ITEMS, | |
33 | MEMCG_RSS, | |
34 | MEMCG_RSS_HUGE, | |
35 | MEMCG_SWAP, | |
36 | MEMCG_SOCK, | |
37 | /* XXX: why are these zone and not node counters? */ | |
38 | MEMCG_KERNEL_STACK_KB, | |
b2807f07 | 39 | MEMCG_NR_STAT, |
2a7106f2 GT |
40 | }; |
41 | ||
e27be240 JW |
42 | enum memcg_memory_event { |
43 | MEMCG_LOW, | |
71cd3113 JW |
44 | MEMCG_HIGH, |
45 | MEMCG_MAX, | |
46 | MEMCG_OOM, | |
fe6bdfc8 | 47 | MEMCG_OOM_KILL, |
f3a53a3a TH |
48 | MEMCG_SWAP_MAX, |
49 | MEMCG_SWAP_FAIL, | |
e27be240 | 50 | MEMCG_NR_MEMORY_EVENTS, |
71cd3113 JW |
51 | }; |
52 | ||
bf8d5d52 RG |
53 | enum mem_cgroup_protection { |
54 | MEMCG_PROT_NONE, | |
55 | MEMCG_PROT_LOW, | |
56 | MEMCG_PROT_MIN, | |
57 | }; | |
58 | ||
5660048c | 59 | struct mem_cgroup_reclaim_cookie { |
ef8f2327 | 60 | pg_data_t *pgdat; |
5660048c JW |
61 | unsigned int generation; |
62 | }; | |
63 | ||
71cd3113 JW |
64 | #ifdef CONFIG_MEMCG |
65 | ||
66 | #define MEM_CGROUP_ID_SHIFT 16 | |
67 | #define MEM_CGROUP_ID_MAX USHRT_MAX | |
68 | ||
69 | struct mem_cgroup_id { | |
70 | int id; | |
1c2d479a | 71 | refcount_t ref; |
71cd3113 JW |
72 | }; |
73 | ||
33398cf2 MH |
74 | /* |
75 | * Per memcg event counter is incremented at every pagein/pageout. With THP, | |
76 | * it will be incremated by the number of pages. This counter is used for | |
77 | * for trigger some periodic events. This is straightforward and better | |
78 | * than using jiffies etc. to handle periodic memcg event. | |
79 | */ | |
80 | enum mem_cgroup_events_target { | |
81 | MEM_CGROUP_TARGET_THRESH, | |
82 | MEM_CGROUP_TARGET_SOFTLIMIT, | |
33398cf2 MH |
83 | MEM_CGROUP_NTARGETS, |
84 | }; | |
85 | ||
871789d4 CD |
86 | struct memcg_vmstats_percpu { |
87 | long stat[MEMCG_NR_STAT]; | |
e27be240 | 88 | unsigned long events[NR_VM_EVENT_ITEMS]; |
33398cf2 MH |
89 | unsigned long nr_page_events; |
90 | unsigned long targets[MEM_CGROUP_NTARGETS]; | |
91 | }; | |
92 | ||
93 | struct mem_cgroup_reclaim_iter { | |
94 | struct mem_cgroup *position; | |
95 | /* scan generation, increased every round-trip */ | |
96 | unsigned int generation; | |
97 | }; | |
98 | ||
00f3ca2c JW |
99 | struct lruvec_stat { |
100 | long count[NR_VM_NODE_STAT_ITEMS]; | |
101 | }; | |
102 | ||
0a4465d3 KT |
103 | /* |
104 | * Bitmap of shrinker::id corresponding to memcg-aware shrinkers, | |
105 | * which have elements charged to this memcg. | |
106 | */ | |
107 | struct memcg_shrinker_map { | |
108 | struct rcu_head rcu; | |
307ed94c | 109 | unsigned long map[]; |
0a4465d3 KT |
110 | }; |
111 | ||
33398cf2 | 112 | /* |
242c37b4 | 113 | * per-node information in memory controller. |
33398cf2 | 114 | */ |
ef8f2327 | 115 | struct mem_cgroup_per_node { |
33398cf2 | 116 | struct lruvec lruvec; |
a983b5eb | 117 | |
815744d7 JW |
118 | /* Legacy local VM stats */ |
119 | struct lruvec_stat __percpu *lruvec_stat_local; | |
120 | ||
121 | /* Subtree VM stats (batched updates) */ | |
a983b5eb JW |
122 | struct lruvec_stat __percpu *lruvec_stat_cpu; |
123 | atomic_long_t lruvec_stat[NR_VM_NODE_STAT_ITEMS]; | |
124 | ||
b4536f0c | 125 | unsigned long lru_zone_size[MAX_NR_ZONES][NR_LRU_LISTS]; |
33398cf2 | 126 | |
9da83f3f | 127 | struct mem_cgroup_reclaim_iter iter; |
33398cf2 | 128 | |
0a4465d3 | 129 | struct memcg_shrinker_map __rcu *shrinker_map; |
0a432dcb | 130 | |
33398cf2 MH |
131 | struct rb_node tree_node; /* RB tree node */ |
132 | unsigned long usage_in_excess;/* Set to the value by which */ | |
133 | /* the soft limit is exceeded*/ | |
134 | bool on_tree; | |
135 | struct mem_cgroup *memcg; /* Back pointer, we cannot */ | |
136 | /* use container_of */ | |
137 | }; | |
138 | ||
33398cf2 MH |
139 | struct mem_cgroup_threshold { |
140 | struct eventfd_ctx *eventfd; | |
141 | unsigned long threshold; | |
142 | }; | |
143 | ||
144 | /* For threshold */ | |
145 | struct mem_cgroup_threshold_ary { | |
146 | /* An array index points to threshold just below or equal to usage. */ | |
147 | int current_threshold; | |
148 | /* Size of entries[] */ | |
149 | unsigned int size; | |
150 | /* Array of thresholds */ | |
307ed94c | 151 | struct mem_cgroup_threshold entries[]; |
33398cf2 MH |
152 | }; |
153 | ||
154 | struct mem_cgroup_thresholds { | |
155 | /* Primary thresholds array */ | |
156 | struct mem_cgroup_threshold_ary *primary; | |
157 | /* | |
158 | * Spare threshold array. | |
159 | * This is needed to make mem_cgroup_unregister_event() "never fail". | |
160 | * It must be able to store at least primary->size - 1 entries. | |
161 | */ | |
162 | struct mem_cgroup_threshold_ary *spare; | |
163 | }; | |
164 | ||
567e9ab2 JW |
165 | enum memcg_kmem_state { |
166 | KMEM_NONE, | |
167 | KMEM_ALLOCATED, | |
168 | KMEM_ONLINE, | |
169 | }; | |
170 | ||
e81bf979 AL |
171 | #if defined(CONFIG_SMP) |
172 | struct memcg_padding { | |
173 | char x[0]; | |
174 | } ____cacheline_internodealigned_in_smp; | |
175 | #define MEMCG_PADDING(name) struct memcg_padding name; | |
176 | #else | |
177 | #define MEMCG_PADDING(name) | |
178 | #endif | |
179 | ||
97b27821 TH |
180 | /* |
181 | * Remember four most recent foreign writebacks with dirty pages in this | |
182 | * cgroup. Inode sharing is expected to be uncommon and, even if we miss | |
183 | * one in a given round, we're likely to catch it later if it keeps | |
184 | * foreign-dirtying, so a fairly low count should be enough. | |
185 | * | |
186 | * See mem_cgroup_track_foreign_dirty_slowpath() for details. | |
187 | */ | |
188 | #define MEMCG_CGWB_FRN_CNT 4 | |
189 | ||
190 | struct memcg_cgwb_frn { | |
191 | u64 bdi_id; /* bdi->id of the foreign inode */ | |
192 | int memcg_id; /* memcg->css.id of foreign inode */ | |
193 | u64 at; /* jiffies_64 at the time of dirtying */ | |
194 | struct wb_completion done; /* tracks in-flight foreign writebacks */ | |
195 | }; | |
196 | ||
33398cf2 MH |
197 | /* |
198 | * The memory controller data structure. The memory controller controls both | |
199 | * page cache and RSS per cgroup. We would eventually like to provide | |
200 | * statistics based on the statistics developed by Rik Van Riel for clock-pro, | |
201 | * to help the administrator determine what knobs to tune. | |
202 | */ | |
203 | struct mem_cgroup { | |
204 | struct cgroup_subsys_state css; | |
205 | ||
73f576c0 JW |
206 | /* Private memcg ID. Used to ID objects that outlive the cgroup */ |
207 | struct mem_cgroup_id id; | |
208 | ||
33398cf2 MH |
209 | /* Accounted resources */ |
210 | struct page_counter memory; | |
37e84351 | 211 | struct page_counter swap; |
0db15298 JW |
212 | |
213 | /* Legacy consumer-oriented counters */ | |
33398cf2 MH |
214 | struct page_counter memsw; |
215 | struct page_counter kmem; | |
0db15298 | 216 | struct page_counter tcpmem; |
33398cf2 | 217 | |
23067153 | 218 | /* Upper bound of normal memory consumption range */ |
33398cf2 MH |
219 | unsigned long high; |
220 | ||
f7e1cb6e JW |
221 | /* Range enforcement for interrupt charges */ |
222 | struct work_struct high_work; | |
223 | ||
33398cf2 MH |
224 | unsigned long soft_limit; |
225 | ||
226 | /* vmpressure notifications */ | |
227 | struct vmpressure vmpressure; | |
228 | ||
33398cf2 MH |
229 | /* |
230 | * Should the accounting and control be hierarchical, per subtree? | |
231 | */ | |
232 | bool use_hierarchy; | |
233 | ||
3d8b38eb RG |
234 | /* |
235 | * Should the OOM killer kill all belonging tasks, had it kill one? | |
236 | */ | |
237 | bool oom_group; | |
238 | ||
33398cf2 MH |
239 | /* protected by memcg_oom_lock */ |
240 | bool oom_lock; | |
241 | int under_oom; | |
242 | ||
243 | int swappiness; | |
244 | /* OOM-Killer disable */ | |
245 | int oom_kill_disable; | |
246 | ||
1e577f97 | 247 | /* memory.events and memory.events.local */ |
472912a2 | 248 | struct cgroup_file events_file; |
1e577f97 | 249 | struct cgroup_file events_local_file; |
472912a2 | 250 | |
f3a53a3a TH |
251 | /* handle for "memory.swap.events" */ |
252 | struct cgroup_file swap_events_file; | |
253 | ||
33398cf2 MH |
254 | /* protect arrays of thresholds */ |
255 | struct mutex thresholds_lock; | |
256 | ||
257 | /* thresholds for memory usage. RCU-protected */ | |
258 | struct mem_cgroup_thresholds thresholds; | |
259 | ||
260 | /* thresholds for mem+swap usage. RCU-protected */ | |
261 | struct mem_cgroup_thresholds memsw_thresholds; | |
262 | ||
263 | /* For oom notifier event fd */ | |
264 | struct list_head oom_notify; | |
265 | ||
266 | /* | |
267 | * Should we move charges of a task when a task is moved into this | |
268 | * mem_cgroup ? And what type of charges should we move ? | |
269 | */ | |
270 | unsigned long move_charge_at_immigrate; | |
e81bf979 AL |
271 | /* taken only while moving_account > 0 */ |
272 | spinlock_t move_lock; | |
273 | unsigned long move_lock_flags; | |
274 | ||
275 | MEMCG_PADDING(_pad1_); | |
276 | ||
33398cf2 MH |
277 | /* |
278 | * set > 0 if pages under this cgroup are moving to other cgroup. | |
279 | */ | |
280 | atomic_t moving_account; | |
33398cf2 | 281 | struct task_struct *move_lock_task; |
a983b5eb | 282 | |
815744d7 JW |
283 | /* Legacy local VM stats and events */ |
284 | struct memcg_vmstats_percpu __percpu *vmstats_local; | |
285 | ||
286 | /* Subtree VM stats and events (batched updates) */ | |
871789d4 | 287 | struct memcg_vmstats_percpu __percpu *vmstats_percpu; |
e81bf979 AL |
288 | |
289 | MEMCG_PADDING(_pad2_); | |
290 | ||
871789d4 CD |
291 | atomic_long_t vmstats[MEMCG_NR_STAT]; |
292 | atomic_long_t vmevents[NR_VM_EVENT_ITEMS]; | |
42a30035 | 293 | |
815744d7 | 294 | /* memory.events */ |
42a30035 | 295 | atomic_long_t memory_events[MEMCG_NR_MEMORY_EVENTS]; |
1e577f97 | 296 | atomic_long_t memory_events_local[MEMCG_NR_MEMORY_EVENTS]; |
33398cf2 | 297 | |
d886f4e4 JW |
298 | unsigned long socket_pressure; |
299 | ||
300 | /* Legacy tcp memory accounting */ | |
0db15298 JW |
301 | bool tcpmem_active; |
302 | int tcpmem_pressure; | |
d886f4e4 | 303 | |
84c07d11 | 304 | #ifdef CONFIG_MEMCG_KMEM |
33398cf2 MH |
305 | /* Index in the kmem_cache->memcg_params.memcg_caches array */ |
306 | int kmemcg_id; | |
567e9ab2 | 307 | enum memcg_kmem_state kmem_state; |
bc2791f8 | 308 | struct list_head kmem_caches; |
33398cf2 MH |
309 | #endif |
310 | ||
33398cf2 MH |
311 | #ifdef CONFIG_CGROUP_WRITEBACK |
312 | struct list_head cgwb_list; | |
313 | struct wb_domain cgwb_domain; | |
97b27821 | 314 | struct memcg_cgwb_frn cgwb_frn[MEMCG_CGWB_FRN_CNT]; |
33398cf2 MH |
315 | #endif |
316 | ||
317 | /* List of events which userspace want to receive */ | |
318 | struct list_head event_list; | |
319 | spinlock_t event_list_lock; | |
320 | ||
87eaceb3 YS |
321 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
322 | struct deferred_split deferred_split_queue; | |
323 | #endif | |
324 | ||
33398cf2 MH |
325 | struct mem_cgroup_per_node *nodeinfo[0]; |
326 | /* WARNING: nodeinfo must be the last member here */ | |
327 | }; | |
7d828602 | 328 | |
a983b5eb JW |
329 | /* |
330 | * size of first charge trial. "32" comes from vmscan.c's magic value. | |
331 | * TODO: maybe necessary to use big numbers in big irons. | |
332 | */ | |
333 | #define MEMCG_CHARGE_BATCH 32U | |
334 | ||
7d828602 | 335 | extern struct mem_cgroup *root_mem_cgroup; |
56161634 | 336 | |
dfd2f10c KT |
337 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
338 | { | |
339 | return (memcg == root_mem_cgroup); | |
340 | } | |
341 | ||
23047a96 JW |
342 | static inline bool mem_cgroup_disabled(void) |
343 | { | |
344 | return !cgroup_subsys_enabled(memory_cgrp_subsys); | |
345 | } | |
346 | ||
1bc63fb1 CD |
347 | static inline unsigned long mem_cgroup_protection(struct mem_cgroup *memcg, |
348 | bool in_low_reclaim) | |
9783aa99 | 349 | { |
1bc63fb1 CD |
350 | if (mem_cgroup_disabled()) |
351 | return 0; | |
352 | ||
353 | if (in_low_reclaim) | |
354 | return READ_ONCE(memcg->memory.emin); | |
9783aa99 | 355 | |
1bc63fb1 CD |
356 | return max(READ_ONCE(memcg->memory.emin), |
357 | READ_ONCE(memcg->memory.elow)); | |
9783aa99 CD |
358 | } |
359 | ||
bf8d5d52 RG |
360 | enum mem_cgroup_protection mem_cgroup_protected(struct mem_cgroup *root, |
361 | struct mem_cgroup *memcg); | |
241994ed | 362 | |
00501b53 | 363 | int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
f627c2f5 KS |
364 | gfp_t gfp_mask, struct mem_cgroup **memcgp, |
365 | bool compound); | |
2cf85583 TH |
366 | int mem_cgroup_try_charge_delay(struct page *page, struct mm_struct *mm, |
367 | gfp_t gfp_mask, struct mem_cgroup **memcgp, | |
368 | bool compound); | |
00501b53 | 369 | void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg, |
f627c2f5 KS |
370 | bool lrucare, bool compound); |
371 | void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg, | |
372 | bool compound); | |
0a31bc97 | 373 | void mem_cgroup_uncharge(struct page *page); |
747db954 | 374 | void mem_cgroup_uncharge_list(struct list_head *page_list); |
569b846d | 375 | |
6a93ca8f | 376 | void mem_cgroup_migrate(struct page *oldpage, struct page *newpage); |
569b846d | 377 | |
ef8f2327 MG |
378 | static struct mem_cgroup_per_node * |
379 | mem_cgroup_nodeinfo(struct mem_cgroup *memcg, int nid) | |
55779ec7 | 380 | { |
ef8f2327 | 381 | return memcg->nodeinfo[nid]; |
55779ec7 JW |
382 | } |
383 | ||
384 | /** | |
867e5e1d | 385 | * mem_cgroup_lruvec - get the lru list vector for a memcg & node |
55779ec7 JW |
386 | * @memcg: memcg of the wanted lruvec |
387 | * | |
867e5e1d JW |
388 | * Returns the lru list vector holding pages for a given @memcg & |
389 | * @node combination. This can be the node lruvec, if the memory | |
390 | * controller is disabled. | |
55779ec7 | 391 | */ |
867e5e1d JW |
392 | static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg, |
393 | struct pglist_data *pgdat) | |
55779ec7 | 394 | { |
ef8f2327 | 395 | struct mem_cgroup_per_node *mz; |
55779ec7 JW |
396 | struct lruvec *lruvec; |
397 | ||
398 | if (mem_cgroup_disabled()) { | |
867e5e1d | 399 | lruvec = &pgdat->__lruvec; |
55779ec7 JW |
400 | goto out; |
401 | } | |
402 | ||
1b05117d JW |
403 | if (!memcg) |
404 | memcg = root_mem_cgroup; | |
405 | ||
ef8f2327 | 406 | mz = mem_cgroup_nodeinfo(memcg, pgdat->node_id); |
55779ec7 JW |
407 | lruvec = &mz->lruvec; |
408 | out: | |
409 | /* | |
410 | * Since a node can be onlined after the mem_cgroup was created, | |
599d0c95 | 411 | * we have to be prepared to initialize lruvec->pgdat here; |
55779ec7 JW |
412 | * and if offlined then reonlined, we need to reinitialize it. |
413 | */ | |
ef8f2327 MG |
414 | if (unlikely(lruvec->pgdat != pgdat)) |
415 | lruvec->pgdat = pgdat; | |
55779ec7 JW |
416 | return lruvec; |
417 | } | |
418 | ||
599d0c95 | 419 | struct lruvec *mem_cgroup_page_lruvec(struct page *, struct pglist_data *); |
c9b0ed51 | 420 | |
64219994 | 421 | struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
e993d905 | 422 | |
d46eb14b SB |
423 | struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm); |
424 | ||
f745c6f5 SB |
425 | struct mem_cgroup *get_mem_cgroup_from_page(struct page *page); |
426 | ||
33398cf2 MH |
427 | static inline |
428 | struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){ | |
429 | return css ? container_of(css, struct mem_cgroup, css) : NULL; | |
430 | } | |
431 | ||
dc0b5864 RG |
432 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
433 | { | |
d46eb14b SB |
434 | if (memcg) |
435 | css_put(&memcg->css); | |
dc0b5864 RG |
436 | } |
437 | ||
8e8ae645 JW |
438 | #define mem_cgroup_from_counter(counter, member) \ |
439 | container_of(counter, struct mem_cgroup, member) | |
440 | ||
33398cf2 MH |
441 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
442 | struct mem_cgroup *, | |
443 | struct mem_cgroup_reclaim_cookie *); | |
444 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); | |
7c5f64f8 VD |
445 | int mem_cgroup_scan_tasks(struct mem_cgroup *, |
446 | int (*)(struct task_struct *, void *), void *); | |
33398cf2 | 447 | |
23047a96 JW |
448 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
449 | { | |
450 | if (mem_cgroup_disabled()) | |
451 | return 0; | |
452 | ||
73f576c0 | 453 | return memcg->id.id; |
23047a96 | 454 | } |
73f576c0 | 455 | struct mem_cgroup *mem_cgroup_from_id(unsigned short id); |
23047a96 | 456 | |
aa9694bb CD |
457 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
458 | { | |
459 | return mem_cgroup_from_css(seq_css(m)); | |
460 | } | |
461 | ||
2262185c RG |
462 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
463 | { | |
464 | struct mem_cgroup_per_node *mz; | |
465 | ||
466 | if (mem_cgroup_disabled()) | |
467 | return NULL; | |
468 | ||
469 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
470 | return mz->memcg; | |
471 | } | |
472 | ||
8e8ae645 JW |
473 | /** |
474 | * parent_mem_cgroup - find the accounting parent of a memcg | |
475 | * @memcg: memcg whose parent to find | |
476 | * | |
477 | * Returns the parent memcg, or NULL if this is the root or the memory | |
478 | * controller is in legacy no-hierarchy mode. | |
479 | */ | |
480 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) | |
481 | { | |
482 | if (!memcg->memory.parent) | |
483 | return NULL; | |
484 | return mem_cgroup_from_counter(memcg->memory.parent, memory); | |
485 | } | |
486 | ||
33398cf2 MH |
487 | static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, |
488 | struct mem_cgroup *root) | |
489 | { | |
490 | if (root == memcg) | |
491 | return true; | |
492 | if (!root->use_hierarchy) | |
493 | return false; | |
494 | return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup); | |
495 | } | |
e1aab161 | 496 | |
2314b42d JW |
497 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
498 | struct mem_cgroup *memcg) | |
2e4d4091 | 499 | { |
587af308 | 500 | struct mem_cgroup *task_memcg; |
413918bb | 501 | bool match = false; |
c3ac9a8a | 502 | |
2e4d4091 | 503 | rcu_read_lock(); |
587af308 | 504 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
413918bb | 505 | if (task_memcg) |
2314b42d | 506 | match = mem_cgroup_is_descendant(task_memcg, memcg); |
2e4d4091 | 507 | rcu_read_unlock(); |
c3ac9a8a | 508 | return match; |
2e4d4091 | 509 | } |
8a9f3ccd | 510 | |
64219994 | 511 | struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page); |
2fc04524 | 512 | ino_t page_cgroup_ino(struct page *page); |
d324236b | 513 | |
eb01aaab VD |
514 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
515 | { | |
516 | if (mem_cgroup_disabled()) | |
517 | return true; | |
518 | return !!(memcg->css.flags & CSS_ONLINE); | |
519 | } | |
520 | ||
58ae83db KH |
521 | /* |
522 | * For memory reclaim. | |
523 | */ | |
889976db | 524 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
33398cf2 MH |
525 | |
526 | void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, | |
b4536f0c | 527 | int zid, int nr_pages); |
33398cf2 | 528 | |
b4536f0c MH |
529 | static inline |
530 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
531 | enum lru_list lru, int zone_idx) | |
532 | { | |
533 | struct mem_cgroup_per_node *mz; | |
534 | ||
535 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
536 | return mz->lru_zone_size[zone_idx][lru]; | |
33398cf2 MH |
537 | } |
538 | ||
b23afb93 TH |
539 | void mem_cgroup_handle_over_high(void); |
540 | ||
bbec2e15 | 541 | unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg); |
7c5f64f8 | 542 | |
9783aa99 CD |
543 | unsigned long mem_cgroup_size(struct mem_cgroup *memcg); |
544 | ||
f0c867d9 | 545 | void mem_cgroup_print_oom_context(struct mem_cgroup *memcg, |
64219994 | 546 | struct task_struct *p); |
58ae83db | 547 | |
f0c867d9 | 548 | void mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg); |
549 | ||
29ef680a | 550 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 | 551 | { |
29ef680a MH |
552 | WARN_ON(current->in_user_fault); |
553 | current->in_user_fault = 1; | |
519e5247 JW |
554 | } |
555 | ||
29ef680a | 556 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 | 557 | { |
29ef680a MH |
558 | WARN_ON(!current->in_user_fault); |
559 | current->in_user_fault = 0; | |
519e5247 JW |
560 | } |
561 | ||
3812c8c8 JW |
562 | static inline bool task_in_memcg_oom(struct task_struct *p) |
563 | { | |
626ebc41 | 564 | return p->memcg_in_oom; |
3812c8c8 JW |
565 | } |
566 | ||
49426420 | 567 | bool mem_cgroup_oom_synchronize(bool wait); |
3d8b38eb RG |
568 | struct mem_cgroup *mem_cgroup_get_oom_group(struct task_struct *victim, |
569 | struct mem_cgroup *oom_domain); | |
570 | void mem_cgroup_print_oom_group(struct mem_cgroup *memcg); | |
3812c8c8 | 571 | |
c255a458 | 572 | #ifdef CONFIG_MEMCG_SWAP |
c077719b KH |
573 | extern int do_swap_account; |
574 | #endif | |
f8d66542 | 575 | |
739f79fc JW |
576 | struct mem_cgroup *lock_page_memcg(struct page *page); |
577 | void __unlock_page_memcg(struct mem_cgroup *memcg); | |
62cccb8c | 578 | void unlock_page_memcg(struct page *page); |
d7365e78 | 579 | |
42a30035 JW |
580 | /* |
581 | * idx can be of type enum memcg_stat_item or node_stat_item. | |
582 | * Keep in sync with memcg_exact_page_state(). | |
583 | */ | |
584 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx) | |
585 | { | |
586 | long x = atomic_long_read(&memcg->vmstats[idx]); | |
587 | #ifdef CONFIG_SMP | |
588 | if (x < 0) | |
589 | x = 0; | |
590 | #endif | |
591 | return x; | |
592 | } | |
593 | ||
0b3d6e6f GT |
594 | /* |
595 | * idx can be of type enum memcg_stat_item or node_stat_item. | |
596 | * Keep in sync with memcg_exact_page_state(). | |
597 | */ | |
205b20cc JW |
598 | static inline unsigned long memcg_page_state_local(struct mem_cgroup *memcg, |
599 | int idx) | |
2a2e4885 | 600 | { |
815744d7 JW |
601 | long x = 0; |
602 | int cpu; | |
603 | ||
604 | for_each_possible_cpu(cpu) | |
605 | x += per_cpu(memcg->vmstats_local->stat[idx], cpu); | |
a983b5eb JW |
606 | #ifdef CONFIG_SMP |
607 | if (x < 0) | |
608 | x = 0; | |
609 | #endif | |
610 | return x; | |
2a2e4885 JW |
611 | } |
612 | ||
db9adbcb | 613 | void __mod_memcg_state(struct mem_cgroup *memcg, int idx, int val); |
2a2e4885 | 614 | |
04fecbf5 | 615 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 616 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 617 | int idx, int val) |
2a2e4885 | 618 | { |
c3cc3911 JW |
619 | unsigned long flags; |
620 | ||
621 | local_irq_save(flags); | |
a983b5eb | 622 | __mod_memcg_state(memcg, idx, val); |
c3cc3911 | 623 | local_irq_restore(flags); |
2a2e4885 JW |
624 | } |
625 | ||
33398cf2 | 626 | /** |
ccda7f43 | 627 | * mod_memcg_page_state - update page state statistics |
62cccb8c | 628 | * @page: the page |
33398cf2 MH |
629 | * @idx: page state item to account |
630 | * @val: number of pages (positive or negative) | |
631 | * | |
fdf1cdb9 JW |
632 | * The @page must be locked or the caller must use lock_page_memcg() |
633 | * to prevent double accounting when the page is concurrently being | |
634 | * moved to another memcg: | |
81f8c3a4 | 635 | * |
fdf1cdb9 | 636 | * lock_page(page) or lock_page_memcg(page) |
81f8c3a4 | 637 | * if (TestClearPageState(page)) |
ccda7f43 | 638 | * mod_memcg_page_state(page, state, -1); |
fdf1cdb9 | 639 | * unlock_page(page) or unlock_page_memcg(page) |
2a2e4885 JW |
640 | * |
641 | * Kernel pages are an exception to this, since they'll never move. | |
33398cf2 | 642 | */ |
00f3ca2c | 643 | static inline void __mod_memcg_page_state(struct page *page, |
04fecbf5 | 644 | int idx, int val) |
00f3ca2c JW |
645 | { |
646 | if (page->mem_cgroup) | |
647 | __mod_memcg_state(page->mem_cgroup, idx, val); | |
648 | } | |
649 | ||
ccda7f43 | 650 | static inline void mod_memcg_page_state(struct page *page, |
04fecbf5 | 651 | int idx, int val) |
33398cf2 | 652 | { |
62cccb8c | 653 | if (page->mem_cgroup) |
ccda7f43 | 654 | mod_memcg_state(page->mem_cgroup, idx, val); |
33398cf2 MH |
655 | } |
656 | ||
42a30035 JW |
657 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
658 | enum node_stat_item idx) | |
659 | { | |
660 | struct mem_cgroup_per_node *pn; | |
661 | long x; | |
662 | ||
663 | if (mem_cgroup_disabled()) | |
664 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
665 | ||
666 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
667 | x = atomic_long_read(&pn->lruvec_stat[idx]); | |
668 | #ifdef CONFIG_SMP | |
669 | if (x < 0) | |
670 | x = 0; | |
671 | #endif | |
672 | return x; | |
673 | } | |
674 | ||
205b20cc JW |
675 | static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
676 | enum node_stat_item idx) | |
2a7106f2 | 677 | { |
00f3ca2c | 678 | struct mem_cgroup_per_node *pn; |
815744d7 JW |
679 | long x = 0; |
680 | int cpu; | |
00f3ca2c JW |
681 | |
682 | if (mem_cgroup_disabled()) | |
683 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
684 | ||
685 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
815744d7 JW |
686 | for_each_possible_cpu(cpu) |
687 | x += per_cpu(pn->lruvec_stat_local->count[idx], cpu); | |
a983b5eb JW |
688 | #ifdef CONFIG_SMP |
689 | if (x < 0) | |
690 | x = 0; | |
691 | #endif | |
692 | return x; | |
2a7106f2 GT |
693 | } |
694 | ||
db9adbcb JW |
695 | void __mod_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx, |
696 | int val); | |
ec9f0238 | 697 | void __mod_lruvec_slab_state(void *p, enum node_stat_item idx, int val); |
8380ce47 | 698 | void mod_memcg_obj_state(void *p, int idx, int val); |
00f3ca2c JW |
699 | |
700 | static inline void mod_lruvec_state(struct lruvec *lruvec, | |
701 | enum node_stat_item idx, int val) | |
702 | { | |
c3cc3911 JW |
703 | unsigned long flags; |
704 | ||
705 | local_irq_save(flags); | |
28454265 | 706 | __mod_lruvec_state(lruvec, idx, val); |
c3cc3911 | 707 | local_irq_restore(flags); |
00f3ca2c JW |
708 | } |
709 | ||
710 | static inline void __mod_lruvec_page_state(struct page *page, | |
711 | enum node_stat_item idx, int val) | |
712 | { | |
28454265 JW |
713 | pg_data_t *pgdat = page_pgdat(page); |
714 | struct lruvec *lruvec; | |
00f3ca2c | 715 | |
28454265 JW |
716 | /* Untracked pages have no memcg, no lruvec. Update only the node */ |
717 | if (!page->mem_cgroup) { | |
718 | __mod_node_page_state(pgdat, idx, val); | |
00f3ca2c | 719 | return; |
28454265 JW |
720 | } |
721 | ||
867e5e1d | 722 | lruvec = mem_cgroup_lruvec(page->mem_cgroup, pgdat); |
28454265 | 723 | __mod_lruvec_state(lruvec, idx, val); |
00f3ca2c JW |
724 | } |
725 | ||
726 | static inline void mod_lruvec_page_state(struct page *page, | |
727 | enum node_stat_item idx, int val) | |
728 | { | |
c3cc3911 JW |
729 | unsigned long flags; |
730 | ||
731 | local_irq_save(flags); | |
28454265 | 732 | __mod_lruvec_page_state(page, idx, val); |
c3cc3911 | 733 | local_irq_restore(flags); |
2a7106f2 GT |
734 | } |
735 | ||
ef8f2327 | 736 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
737 | gfp_t gfp_mask, |
738 | unsigned long *total_scanned); | |
a63d83f4 | 739 | |
db9adbcb JW |
740 | void __count_memcg_events(struct mem_cgroup *memcg, enum vm_event_item idx, |
741 | unsigned long count); | |
c9019e9b | 742 | |
2262185c | 743 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
e27be240 JW |
744 | enum vm_event_item idx, |
745 | unsigned long count) | |
2262185c | 746 | { |
c3cc3911 JW |
747 | unsigned long flags; |
748 | ||
749 | local_irq_save(flags); | |
a983b5eb | 750 | __count_memcg_events(memcg, idx, count); |
c3cc3911 | 751 | local_irq_restore(flags); |
2262185c RG |
752 | } |
753 | ||
754 | static inline void count_memcg_page_event(struct page *page, | |
e27be240 | 755 | enum vm_event_item idx) |
2262185c RG |
756 | { |
757 | if (page->mem_cgroup) | |
758 | count_memcg_events(page->mem_cgroup, idx, 1); | |
759 | } | |
760 | ||
761 | static inline void count_memcg_event_mm(struct mm_struct *mm, | |
762 | enum vm_event_item idx) | |
68ae564b | 763 | { |
33398cf2 MH |
764 | struct mem_cgroup *memcg; |
765 | ||
68ae564b DR |
766 | if (mem_cgroup_disabled()) |
767 | return; | |
33398cf2 MH |
768 | |
769 | rcu_read_lock(); | |
770 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
fe6bdfc8 | 771 | if (likely(memcg)) |
c9019e9b | 772 | count_memcg_events(memcg, idx, 1); |
33398cf2 | 773 | rcu_read_unlock(); |
68ae564b | 774 | } |
c9019e9b | 775 | |
e27be240 JW |
776 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
777 | enum memcg_memory_event event) | |
c9019e9b | 778 | { |
1e577f97 SB |
779 | atomic_long_inc(&memcg->memory_events_local[event]); |
780 | cgroup_file_notify(&memcg->events_local_file); | |
781 | ||
9852ae3f CD |
782 | do { |
783 | atomic_long_inc(&memcg->memory_events[event]); | |
784 | cgroup_file_notify(&memcg->events_file); | |
785 | ||
04fd61a4 YS |
786 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys)) |
787 | break; | |
9852ae3f CD |
788 | if (cgrp_dfl_root.flags & CGRP_ROOT_MEMORY_LOCAL_EVENTS) |
789 | break; | |
790 | } while ((memcg = parent_mem_cgroup(memcg)) && | |
791 | !mem_cgroup_is_root(memcg)); | |
c9019e9b JW |
792 | } |
793 | ||
fe6bdfc8 RG |
794 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
795 | enum memcg_memory_event event) | |
796 | { | |
797 | struct mem_cgroup *memcg; | |
798 | ||
799 | if (mem_cgroup_disabled()) | |
800 | return; | |
801 | ||
802 | rcu_read_lock(); | |
803 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
804 | if (likely(memcg)) | |
805 | memcg_memory_event(memcg, event); | |
806 | rcu_read_unlock(); | |
807 | } | |
808 | ||
ca3e0214 | 809 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
e94c8a9c | 810 | void mem_cgroup_split_huge_fixup(struct page *head); |
ca3e0214 KH |
811 | #endif |
812 | ||
c255a458 | 813 | #else /* CONFIG_MEMCG */ |
23047a96 JW |
814 | |
815 | #define MEM_CGROUP_ID_SHIFT 0 | |
816 | #define MEM_CGROUP_ID_MAX 0 | |
817 | ||
7a81b88c KH |
818 | struct mem_cgroup; |
819 | ||
dfd2f10c KT |
820 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
821 | { | |
822 | return true; | |
823 | } | |
824 | ||
23047a96 JW |
825 | static inline bool mem_cgroup_disabled(void) |
826 | { | |
827 | return true; | |
828 | } | |
829 | ||
e27be240 JW |
830 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
831 | enum memcg_memory_event event) | |
241994ed JW |
832 | { |
833 | } | |
834 | ||
fe6bdfc8 RG |
835 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
836 | enum memcg_memory_event event) | |
837 | { | |
838 | } | |
839 | ||
1bc63fb1 CD |
840 | static inline unsigned long mem_cgroup_protection(struct mem_cgroup *memcg, |
841 | bool in_low_reclaim) | |
9783aa99 | 842 | { |
1bc63fb1 | 843 | return 0; |
9783aa99 CD |
844 | } |
845 | ||
bf8d5d52 RG |
846 | static inline enum mem_cgroup_protection mem_cgroup_protected( |
847 | struct mem_cgroup *root, struct mem_cgroup *memcg) | |
241994ed | 848 | { |
bf8d5d52 | 849 | return MEMCG_PROT_NONE; |
241994ed JW |
850 | } |
851 | ||
00501b53 JW |
852 | static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
853 | gfp_t gfp_mask, | |
f627c2f5 KS |
854 | struct mem_cgroup **memcgp, |
855 | bool compound) | |
7a81b88c | 856 | { |
00501b53 | 857 | *memcgp = NULL; |
7a81b88c KH |
858 | return 0; |
859 | } | |
860 | ||
2cf85583 TH |
861 | static inline int mem_cgroup_try_charge_delay(struct page *page, |
862 | struct mm_struct *mm, | |
863 | gfp_t gfp_mask, | |
864 | struct mem_cgroup **memcgp, | |
865 | bool compound) | |
866 | { | |
867 | *memcgp = NULL; | |
868 | return 0; | |
869 | } | |
870 | ||
00501b53 JW |
871 | static inline void mem_cgroup_commit_charge(struct page *page, |
872 | struct mem_cgroup *memcg, | |
f627c2f5 | 873 | bool lrucare, bool compound) |
7a81b88c KH |
874 | { |
875 | } | |
876 | ||
00501b53 | 877 | static inline void mem_cgroup_cancel_charge(struct page *page, |
f627c2f5 KS |
878 | struct mem_cgroup *memcg, |
879 | bool compound) | |
7a81b88c KH |
880 | { |
881 | } | |
882 | ||
0a31bc97 | 883 | static inline void mem_cgroup_uncharge(struct page *page) |
569b846d KH |
884 | { |
885 | } | |
886 | ||
747db954 | 887 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
8a9f3ccd BS |
888 | { |
889 | } | |
890 | ||
6a93ca8f | 891 | static inline void mem_cgroup_migrate(struct page *old, struct page *new) |
69029cd5 KH |
892 | { |
893 | } | |
894 | ||
867e5e1d JW |
895 | static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg, |
896 | struct pglist_data *pgdat) | |
08e552c6 | 897 | { |
867e5e1d | 898 | return &pgdat->__lruvec; |
08e552c6 KH |
899 | } |
900 | ||
fa9add64 | 901 | static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, |
599d0c95 | 902 | struct pglist_data *pgdat) |
66e1707b | 903 | { |
867e5e1d | 904 | return &pgdat->__lruvec; |
66e1707b BS |
905 | } |
906 | ||
b910718a JW |
907 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) |
908 | { | |
909 | return NULL; | |
910 | } | |
911 | ||
587af308 | 912 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
c0ff4b85 | 913 | struct mem_cgroup *memcg) |
bed7161a | 914 | { |
587af308 | 915 | return true; |
bed7161a BS |
916 | } |
917 | ||
d46eb14b SB |
918 | static inline struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm) |
919 | { | |
920 | return NULL; | |
921 | } | |
922 | ||
f745c6f5 SB |
923 | static inline struct mem_cgroup *get_mem_cgroup_from_page(struct page *page) |
924 | { | |
925 | return NULL; | |
926 | } | |
927 | ||
dc0b5864 RG |
928 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
929 | { | |
930 | } | |
931 | ||
5660048c JW |
932 | static inline struct mem_cgroup * |
933 | mem_cgroup_iter(struct mem_cgroup *root, | |
934 | struct mem_cgroup *prev, | |
935 | struct mem_cgroup_reclaim_cookie *reclaim) | |
936 | { | |
937 | return NULL; | |
938 | } | |
939 | ||
940 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
941 | struct mem_cgroup *prev) | |
942 | { | |
943 | } | |
944 | ||
7c5f64f8 VD |
945 | static inline int mem_cgroup_scan_tasks(struct mem_cgroup *memcg, |
946 | int (*fn)(struct task_struct *, void *), void *arg) | |
947 | { | |
948 | return 0; | |
949 | } | |
950 | ||
23047a96 | 951 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
f8d66542 | 952 | { |
23047a96 JW |
953 | return 0; |
954 | } | |
955 | ||
956 | static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id) | |
957 | { | |
958 | WARN_ON_ONCE(id); | |
959 | /* XXX: This should always return root_mem_cgroup */ | |
960 | return NULL; | |
f8d66542 | 961 | } |
a636b327 | 962 | |
aa9694bb CD |
963 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
964 | { | |
965 | return NULL; | |
966 | } | |
967 | ||
2262185c RG |
968 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
969 | { | |
970 | return NULL; | |
971 | } | |
972 | ||
eb01aaab | 973 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
14797e23 | 974 | { |
13308ca9 | 975 | return true; |
14797e23 KM |
976 | } |
977 | ||
b4536f0c MH |
978 | static inline |
979 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
980 | enum lru_list lru, int zone_idx) | |
981 | { | |
982 | return 0; | |
983 | } | |
a3d8e054 | 984 | |
bbec2e15 | 985 | static inline unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg) |
7c5f64f8 VD |
986 | { |
987 | return 0; | |
988 | } | |
989 | ||
9783aa99 CD |
990 | static inline unsigned long mem_cgroup_size(struct mem_cgroup *memcg) |
991 | { | |
992 | return 0; | |
993 | } | |
994 | ||
e222432b | 995 | static inline void |
f0c867d9 | 996 | mem_cgroup_print_oom_context(struct mem_cgroup *memcg, struct task_struct *p) |
997 | { | |
998 | } | |
999 | ||
1000 | static inline void | |
1001 | mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg) | |
e222432b BS |
1002 | { |
1003 | } | |
1004 | ||
739f79fc JW |
1005 | static inline struct mem_cgroup *lock_page_memcg(struct page *page) |
1006 | { | |
1007 | return NULL; | |
1008 | } | |
1009 | ||
1010 | static inline void __unlock_page_memcg(struct mem_cgroup *memcg) | |
89c06bd5 KH |
1011 | { |
1012 | } | |
1013 | ||
62cccb8c | 1014 | static inline void unlock_page_memcg(struct page *page) |
89c06bd5 KH |
1015 | { |
1016 | } | |
1017 | ||
b23afb93 TH |
1018 | static inline void mem_cgroup_handle_over_high(void) |
1019 | { | |
1020 | } | |
1021 | ||
29ef680a | 1022 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 JW |
1023 | { |
1024 | } | |
1025 | ||
29ef680a | 1026 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 JW |
1027 | { |
1028 | } | |
1029 | ||
3812c8c8 JW |
1030 | static inline bool task_in_memcg_oom(struct task_struct *p) |
1031 | { | |
1032 | return false; | |
1033 | } | |
1034 | ||
49426420 | 1035 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
3812c8c8 JW |
1036 | { |
1037 | return false; | |
1038 | } | |
1039 | ||
3d8b38eb RG |
1040 | static inline struct mem_cgroup *mem_cgroup_get_oom_group( |
1041 | struct task_struct *victim, struct mem_cgroup *oom_domain) | |
1042 | { | |
1043 | return NULL; | |
1044 | } | |
1045 | ||
1046 | static inline void mem_cgroup_print_oom_group(struct mem_cgroup *memcg) | |
1047 | { | |
1048 | } | |
1049 | ||
42a30035 JW |
1050 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx) |
1051 | { | |
1052 | return 0; | |
1053 | } | |
1054 | ||
205b20cc JW |
1055 | static inline unsigned long memcg_page_state_local(struct mem_cgroup *memcg, |
1056 | int idx) | |
2a2e4885 JW |
1057 | { |
1058 | return 0; | |
1059 | } | |
1060 | ||
00f3ca2c | 1061 | static inline void __mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1062 | int idx, |
00f3ca2c | 1063 | int nr) |
2a2e4885 JW |
1064 | { |
1065 | } | |
1066 | ||
00f3ca2c | 1067 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1068 | int idx, |
00f3ca2c | 1069 | int nr) |
2a2e4885 JW |
1070 | { |
1071 | } | |
1072 | ||
00f3ca2c | 1073 | static inline void __mod_memcg_page_state(struct page *page, |
04fecbf5 | 1074 | int idx, |
00f3ca2c | 1075 | int nr) |
2a2e4885 JW |
1076 | { |
1077 | } | |
1078 | ||
ccda7f43 | 1079 | static inline void mod_memcg_page_state(struct page *page, |
04fecbf5 | 1080 | int idx, |
ccda7f43 | 1081 | int nr) |
553af430 JW |
1082 | { |
1083 | } | |
1084 | ||
42a30035 JW |
1085 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
1086 | enum node_stat_item idx) | |
1087 | { | |
1088 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
1089 | } | |
1090 | ||
205b20cc JW |
1091 | static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
1092 | enum node_stat_item idx) | |
2a7106f2 | 1093 | { |
00f3ca2c | 1094 | return node_page_state(lruvec_pgdat(lruvec), idx); |
2a7106f2 GT |
1095 | } |
1096 | ||
00f3ca2c JW |
1097 | static inline void __mod_lruvec_state(struct lruvec *lruvec, |
1098 | enum node_stat_item idx, int val) | |
d69b042f | 1099 | { |
00f3ca2c JW |
1100 | __mod_node_page_state(lruvec_pgdat(lruvec), idx, val); |
1101 | } | |
1102 | ||
1103 | static inline void mod_lruvec_state(struct lruvec *lruvec, | |
1104 | enum node_stat_item idx, int val) | |
1105 | { | |
1106 | mod_node_page_state(lruvec_pgdat(lruvec), idx, val); | |
1107 | } | |
1108 | ||
1109 | static inline void __mod_lruvec_page_state(struct page *page, | |
1110 | enum node_stat_item idx, int val) | |
1111 | { | |
1112 | __mod_node_page_state(page_pgdat(page), idx, val); | |
1113 | } | |
1114 | ||
1115 | static inline void mod_lruvec_page_state(struct page *page, | |
1116 | enum node_stat_item idx, int val) | |
1117 | { | |
1118 | mod_node_page_state(page_pgdat(page), idx, val); | |
d69b042f BS |
1119 | } |
1120 | ||
ec9f0238 RG |
1121 | static inline void __mod_lruvec_slab_state(void *p, enum node_stat_item idx, |
1122 | int val) | |
1123 | { | |
1124 | struct page *page = virt_to_head_page(p); | |
1125 | ||
1126 | __mod_node_page_state(page_pgdat(page), idx, val); | |
1127 | } | |
1128 | ||
8380ce47 RG |
1129 | static inline void mod_memcg_obj_state(void *p, int idx, int val) |
1130 | { | |
1131 | } | |
1132 | ||
4e416953 | 1133 | static inline |
ef8f2327 | 1134 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
1135 | gfp_t gfp_mask, |
1136 | unsigned long *total_scanned) | |
4e416953 | 1137 | { |
0608f43d | 1138 | return 0; |
4e416953 BS |
1139 | } |
1140 | ||
e94c8a9c | 1141 | static inline void mem_cgroup_split_huge_fixup(struct page *head) |
ca3e0214 KH |
1142 | { |
1143 | } | |
1144 | ||
2262185c RG |
1145 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
1146 | enum vm_event_item idx, | |
1147 | unsigned long count) | |
1148 | { | |
1149 | } | |
1150 | ||
9851ac13 KT |
1151 | static inline void __count_memcg_events(struct mem_cgroup *memcg, |
1152 | enum vm_event_item idx, | |
1153 | unsigned long count) | |
1154 | { | |
1155 | } | |
1156 | ||
2262185c | 1157 | static inline void count_memcg_page_event(struct page *page, |
04fecbf5 | 1158 | int idx) |
2262185c RG |
1159 | { |
1160 | } | |
1161 | ||
456f998e | 1162 | static inline |
2262185c | 1163 | void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx) |
456f998e YH |
1164 | { |
1165 | } | |
c255a458 | 1166 | #endif /* CONFIG_MEMCG */ |
78fb7466 | 1167 | |
04fecbf5 | 1168 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1169 | static inline void __inc_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1170 | int idx) |
00f3ca2c JW |
1171 | { |
1172 | __mod_memcg_state(memcg, idx, 1); | |
1173 | } | |
1174 | ||
04fecbf5 | 1175 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1176 | static inline void __dec_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1177 | int idx) |
00f3ca2c JW |
1178 | { |
1179 | __mod_memcg_state(memcg, idx, -1); | |
1180 | } | |
1181 | ||
04fecbf5 | 1182 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1183 | static inline void __inc_memcg_page_state(struct page *page, |
04fecbf5 | 1184 | int idx) |
00f3ca2c JW |
1185 | { |
1186 | __mod_memcg_page_state(page, idx, 1); | |
1187 | } | |
1188 | ||
04fecbf5 | 1189 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1190 | static inline void __dec_memcg_page_state(struct page *page, |
04fecbf5 | 1191 | int idx) |
00f3ca2c JW |
1192 | { |
1193 | __mod_memcg_page_state(page, idx, -1); | |
1194 | } | |
1195 | ||
1196 | static inline void __inc_lruvec_state(struct lruvec *lruvec, | |
1197 | enum node_stat_item idx) | |
1198 | { | |
1199 | __mod_lruvec_state(lruvec, idx, 1); | |
1200 | } | |
1201 | ||
1202 | static inline void __dec_lruvec_state(struct lruvec *lruvec, | |
1203 | enum node_stat_item idx) | |
1204 | { | |
1205 | __mod_lruvec_state(lruvec, idx, -1); | |
1206 | } | |
1207 | ||
1208 | static inline void __inc_lruvec_page_state(struct page *page, | |
1209 | enum node_stat_item idx) | |
1210 | { | |
1211 | __mod_lruvec_page_state(page, idx, 1); | |
1212 | } | |
1213 | ||
1214 | static inline void __dec_lruvec_page_state(struct page *page, | |
1215 | enum node_stat_item idx) | |
1216 | { | |
1217 | __mod_lruvec_page_state(page, idx, -1); | |
1218 | } | |
1219 | ||
ec9f0238 RG |
1220 | static inline void __inc_lruvec_slab_state(void *p, enum node_stat_item idx) |
1221 | { | |
1222 | __mod_lruvec_slab_state(p, idx, 1); | |
1223 | } | |
1224 | ||
1225 | static inline void __dec_lruvec_slab_state(void *p, enum node_stat_item idx) | |
1226 | { | |
1227 | __mod_lruvec_slab_state(p, idx, -1); | |
1228 | } | |
1229 | ||
04fecbf5 | 1230 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1231 | static inline void inc_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1232 | int idx) |
00f3ca2c JW |
1233 | { |
1234 | mod_memcg_state(memcg, idx, 1); | |
1235 | } | |
1236 | ||
04fecbf5 | 1237 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1238 | static inline void dec_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1239 | int idx) |
00f3ca2c JW |
1240 | { |
1241 | mod_memcg_state(memcg, idx, -1); | |
1242 | } | |
1243 | ||
04fecbf5 | 1244 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1245 | static inline void inc_memcg_page_state(struct page *page, |
04fecbf5 | 1246 | int idx) |
00f3ca2c JW |
1247 | { |
1248 | mod_memcg_page_state(page, idx, 1); | |
1249 | } | |
1250 | ||
04fecbf5 | 1251 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1252 | static inline void dec_memcg_page_state(struct page *page, |
04fecbf5 | 1253 | int idx) |
00f3ca2c JW |
1254 | { |
1255 | mod_memcg_page_state(page, idx, -1); | |
1256 | } | |
1257 | ||
1258 | static inline void inc_lruvec_state(struct lruvec *lruvec, | |
1259 | enum node_stat_item idx) | |
1260 | { | |
1261 | mod_lruvec_state(lruvec, idx, 1); | |
1262 | } | |
1263 | ||
1264 | static inline void dec_lruvec_state(struct lruvec *lruvec, | |
1265 | enum node_stat_item idx) | |
1266 | { | |
1267 | mod_lruvec_state(lruvec, idx, -1); | |
1268 | } | |
1269 | ||
1270 | static inline void inc_lruvec_page_state(struct page *page, | |
1271 | enum node_stat_item idx) | |
1272 | { | |
1273 | mod_lruvec_page_state(page, idx, 1); | |
1274 | } | |
1275 | ||
1276 | static inline void dec_lruvec_page_state(struct page *page, | |
1277 | enum node_stat_item idx) | |
1278 | { | |
1279 | mod_lruvec_page_state(page, idx, -1); | |
1280 | } | |
1281 | ||
52ebea74 | 1282 | #ifdef CONFIG_CGROUP_WRITEBACK |
841710aa | 1283 | |
841710aa | 1284 | struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb); |
c5edf9cd TH |
1285 | void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages, |
1286 | unsigned long *pheadroom, unsigned long *pdirty, | |
1287 | unsigned long *pwriteback); | |
841710aa | 1288 | |
97b27821 TH |
1289 | void mem_cgroup_track_foreign_dirty_slowpath(struct page *page, |
1290 | struct bdi_writeback *wb); | |
1291 | ||
1292 | static inline void mem_cgroup_track_foreign_dirty(struct page *page, | |
1293 | struct bdi_writeback *wb) | |
1294 | { | |
08d1d0e6 BH |
1295 | if (mem_cgroup_disabled()) |
1296 | return; | |
1297 | ||
97b27821 TH |
1298 | if (unlikely(&page->mem_cgroup->css != wb->memcg_css)) |
1299 | mem_cgroup_track_foreign_dirty_slowpath(page, wb); | |
1300 | } | |
1301 | ||
1302 | void mem_cgroup_flush_foreign(struct bdi_writeback *wb); | |
1303 | ||
841710aa TH |
1304 | #else /* CONFIG_CGROUP_WRITEBACK */ |
1305 | ||
1306 | static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb) | |
1307 | { | |
1308 | return NULL; | |
1309 | } | |
1310 | ||
c2aa723a | 1311 | static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb, |
c5edf9cd TH |
1312 | unsigned long *pfilepages, |
1313 | unsigned long *pheadroom, | |
c2aa723a TH |
1314 | unsigned long *pdirty, |
1315 | unsigned long *pwriteback) | |
1316 | { | |
1317 | } | |
1318 | ||
97b27821 TH |
1319 | static inline void mem_cgroup_track_foreign_dirty(struct page *page, |
1320 | struct bdi_writeback *wb) | |
1321 | { | |
1322 | } | |
1323 | ||
1324 | static inline void mem_cgroup_flush_foreign(struct bdi_writeback *wb) | |
1325 | { | |
1326 | } | |
1327 | ||
841710aa | 1328 | #endif /* CONFIG_CGROUP_WRITEBACK */ |
52ebea74 | 1329 | |
e1aab161 | 1330 | struct sock; |
baac50bb JW |
1331 | bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); |
1332 | void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); | |
d886f4e4 | 1333 | #ifdef CONFIG_MEMCG |
ef12947c JW |
1334 | extern struct static_key_false memcg_sockets_enabled_key; |
1335 | #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key) | |
2d758073 JW |
1336 | void mem_cgroup_sk_alloc(struct sock *sk); |
1337 | void mem_cgroup_sk_free(struct sock *sk); | |
baac50bb | 1338 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c | 1339 | { |
0db15298 | 1340 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && memcg->tcpmem_pressure) |
8e8ae645 | 1341 | return true; |
8e8ae645 JW |
1342 | do { |
1343 | if (time_before(jiffies, memcg->socket_pressure)) | |
1344 | return true; | |
1345 | } while ((memcg = parent_mem_cgroup(memcg))); | |
1346 | return false; | |
e805605c | 1347 | } |
0a432dcb YS |
1348 | |
1349 | extern int memcg_expand_shrinker_maps(int new_id); | |
1350 | ||
1351 | extern void memcg_set_shrinker_bit(struct mem_cgroup *memcg, | |
1352 | int nid, int shrinker_id); | |
e805605c | 1353 | #else |
80e95fe0 | 1354 | #define mem_cgroup_sockets_enabled 0 |
2d758073 JW |
1355 | static inline void mem_cgroup_sk_alloc(struct sock *sk) { }; |
1356 | static inline void mem_cgroup_sk_free(struct sock *sk) { }; | |
baac50bb | 1357 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c JW |
1358 | { |
1359 | return false; | |
1360 | } | |
0a432dcb YS |
1361 | |
1362 | static inline void memcg_set_shrinker_bit(struct mem_cgroup *memcg, | |
1363 | int nid, int shrinker_id) | |
1364 | { | |
1365 | } | |
e805605c | 1366 | #endif |
7ae1e1d0 | 1367 | |
45264778 VD |
1368 | struct kmem_cache *memcg_kmem_get_cache(struct kmem_cache *cachep); |
1369 | void memcg_kmem_put_cache(struct kmem_cache *cachep); | |
9b6f7e16 RG |
1370 | |
1371 | #ifdef CONFIG_MEMCG_KMEM | |
4b13f64d RG |
1372 | int __memcg_kmem_charge(struct mem_cgroup *memcg, gfp_t gfp, |
1373 | unsigned int nr_pages); | |
1374 | void __memcg_kmem_uncharge(struct mem_cgroup *memcg, unsigned int nr_pages); | |
f4b00eab RG |
1375 | int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, int order); |
1376 | void __memcg_kmem_uncharge_page(struct page *page, int order); | |
45264778 | 1377 | |
ef12947c | 1378 | extern struct static_key_false memcg_kmem_enabled_key; |
17cc4dfe | 1379 | extern struct workqueue_struct *memcg_kmem_cache_wq; |
749c5415 | 1380 | |
dbcf73e2 | 1381 | extern int memcg_nr_cache_ids; |
64219994 MH |
1382 | void memcg_get_cache_ids(void); |
1383 | void memcg_put_cache_ids(void); | |
ebe945c2 GC |
1384 | |
1385 | /* | |
1386 | * Helper macro to loop through all memcg-specific caches. Callers must still | |
1387 | * check if the cache is valid (it is either valid or NULL). | |
1388 | * the slab_mutex must be held when looping through those caches | |
1389 | */ | |
749c5415 | 1390 | #define for_each_memcg_cache_index(_idx) \ |
dbcf73e2 | 1391 | for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++) |
749c5415 | 1392 | |
7ae1e1d0 GC |
1393 | static inline bool memcg_kmem_enabled(void) |
1394 | { | |
ef12947c | 1395 | return static_branch_unlikely(&memcg_kmem_enabled_key); |
7ae1e1d0 GC |
1396 | } |
1397 | ||
f4b00eab RG |
1398 | static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1399 | int order) | |
60cd4bcd SB |
1400 | { |
1401 | if (memcg_kmem_enabled()) | |
f4b00eab | 1402 | return __memcg_kmem_charge_page(page, gfp, order); |
60cd4bcd SB |
1403 | return 0; |
1404 | } | |
1405 | ||
f4b00eab | 1406 | static inline void memcg_kmem_uncharge_page(struct page *page, int order) |
60cd4bcd SB |
1407 | { |
1408 | if (memcg_kmem_enabled()) | |
f4b00eab | 1409 | __memcg_kmem_uncharge_page(page, order); |
60cd4bcd SB |
1410 | } |
1411 | ||
4b13f64d RG |
1412 | static inline int memcg_kmem_charge(struct mem_cgroup *memcg, gfp_t gfp, |
1413 | unsigned int nr_pages) | |
60cd4bcd SB |
1414 | { |
1415 | if (memcg_kmem_enabled()) | |
4b13f64d | 1416 | return __memcg_kmem_charge(memcg, gfp, nr_pages); |
60cd4bcd SB |
1417 | return 0; |
1418 | } | |
49a18eae | 1419 | |
4b13f64d RG |
1420 | static inline void memcg_kmem_uncharge(struct mem_cgroup *memcg, |
1421 | unsigned int nr_pages) | |
49a18eae RG |
1422 | { |
1423 | if (memcg_kmem_enabled()) | |
4b13f64d | 1424 | __memcg_kmem_uncharge(memcg, nr_pages); |
49a18eae RG |
1425 | } |
1426 | ||
33398cf2 | 1427 | /* |
9f706d68 | 1428 | * helper for accessing a memcg's index. It will be used as an index in the |
33398cf2 MH |
1429 | * child cache array in kmem_cache, and also to derive its name. This function |
1430 | * will return -1 when this is not a kmem-limited memcg. | |
1431 | */ | |
1432 | static inline int memcg_cache_id(struct mem_cgroup *memcg) | |
1433 | { | |
1434 | return memcg ? memcg->kmemcg_id : -1; | |
1435 | } | |
5722d094 | 1436 | |
8380ce47 RG |
1437 | struct mem_cgroup *mem_cgroup_from_obj(void *p); |
1438 | ||
7ae1e1d0 | 1439 | #else |
9b6f7e16 | 1440 | |
f4b00eab RG |
1441 | static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1442 | int order) | |
9b6f7e16 RG |
1443 | { |
1444 | return 0; | |
1445 | } | |
1446 | ||
f4b00eab | 1447 | static inline void memcg_kmem_uncharge_page(struct page *page, int order) |
9b6f7e16 RG |
1448 | { |
1449 | } | |
1450 | ||
f4b00eab RG |
1451 | static inline int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1452 | int order) | |
60cd4bcd SB |
1453 | { |
1454 | return 0; | |
1455 | } | |
1456 | ||
f4b00eab | 1457 | static inline void __memcg_kmem_uncharge_page(struct page *page, int order) |
60cd4bcd SB |
1458 | { |
1459 | } | |
1460 | ||
749c5415 GC |
1461 | #define for_each_memcg_cache_index(_idx) \ |
1462 | for (; NULL; ) | |
1463 | ||
b9ce5ef4 GC |
1464 | static inline bool memcg_kmem_enabled(void) |
1465 | { | |
1466 | return false; | |
1467 | } | |
1468 | ||
2633d7a0 GC |
1469 | static inline int memcg_cache_id(struct mem_cgroup *memcg) |
1470 | { | |
1471 | return -1; | |
1472 | } | |
1473 | ||
05257a1a VD |
1474 | static inline void memcg_get_cache_ids(void) |
1475 | { | |
1476 | } | |
1477 | ||
1478 | static inline void memcg_put_cache_ids(void) | |
1479 | { | |
1480 | } | |
1481 | ||
8380ce47 RG |
1482 | static inline struct mem_cgroup *mem_cgroup_from_obj(void *p) |
1483 | { | |
1484 | return NULL; | |
1485 | } | |
1486 | ||
84c07d11 | 1487 | #endif /* CONFIG_MEMCG_KMEM */ |
127424c8 | 1488 | |
8cdea7c0 | 1489 | #endif /* _LINUX_MEMCONTROL_H */ |