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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 { | |
468c3982 | 32 | MEMCG_SWAP = NR_VM_NODE_STAT_ITEMS, |
71cd3113 JW |
33 | MEMCG_SOCK, |
34 | /* XXX: why are these zone and not node counters? */ | |
35 | MEMCG_KERNEL_STACK_KB, | |
b2807f07 | 36 | MEMCG_NR_STAT, |
2a7106f2 GT |
37 | }; |
38 | ||
e27be240 JW |
39 | enum memcg_memory_event { |
40 | MEMCG_LOW, | |
71cd3113 JW |
41 | MEMCG_HIGH, |
42 | MEMCG_MAX, | |
43 | MEMCG_OOM, | |
fe6bdfc8 | 44 | MEMCG_OOM_KILL, |
4b82ab4f | 45 | MEMCG_SWAP_HIGH, |
f3a53a3a TH |
46 | MEMCG_SWAP_MAX, |
47 | MEMCG_SWAP_FAIL, | |
e27be240 | 48 | MEMCG_NR_MEMORY_EVENTS, |
71cd3113 JW |
49 | }; |
50 | ||
bf8d5d52 RG |
51 | enum mem_cgroup_protection { |
52 | MEMCG_PROT_NONE, | |
53 | MEMCG_PROT_LOW, | |
54 | MEMCG_PROT_MIN, | |
55 | }; | |
56 | ||
5660048c | 57 | struct mem_cgroup_reclaim_cookie { |
ef8f2327 | 58 | pg_data_t *pgdat; |
5660048c JW |
59 | unsigned int generation; |
60 | }; | |
61 | ||
71cd3113 JW |
62 | #ifdef CONFIG_MEMCG |
63 | ||
64 | #define MEM_CGROUP_ID_SHIFT 16 | |
65 | #define MEM_CGROUP_ID_MAX USHRT_MAX | |
66 | ||
67 | struct mem_cgroup_id { | |
68 | int id; | |
1c2d479a | 69 | refcount_t ref; |
71cd3113 JW |
70 | }; |
71 | ||
33398cf2 MH |
72 | /* |
73 | * Per memcg event counter is incremented at every pagein/pageout. With THP, | |
74 | * it will be incremated by the number of pages. This counter is used for | |
75 | * for trigger some periodic events. This is straightforward and better | |
76 | * than using jiffies etc. to handle periodic memcg event. | |
77 | */ | |
78 | enum mem_cgroup_events_target { | |
79 | MEM_CGROUP_TARGET_THRESH, | |
80 | MEM_CGROUP_TARGET_SOFTLIMIT, | |
33398cf2 MH |
81 | MEM_CGROUP_NTARGETS, |
82 | }; | |
83 | ||
871789d4 CD |
84 | struct memcg_vmstats_percpu { |
85 | long stat[MEMCG_NR_STAT]; | |
e27be240 | 86 | unsigned long events[NR_VM_EVENT_ITEMS]; |
33398cf2 MH |
87 | unsigned long nr_page_events; |
88 | unsigned long targets[MEM_CGROUP_NTARGETS]; | |
89 | }; | |
90 | ||
91 | struct mem_cgroup_reclaim_iter { | |
92 | struct mem_cgroup *position; | |
93 | /* scan generation, increased every round-trip */ | |
94 | unsigned int generation; | |
95 | }; | |
96 | ||
00f3ca2c JW |
97 | struct lruvec_stat { |
98 | long count[NR_VM_NODE_STAT_ITEMS]; | |
99 | }; | |
100 | ||
0a4465d3 KT |
101 | /* |
102 | * Bitmap of shrinker::id corresponding to memcg-aware shrinkers, | |
103 | * which have elements charged to this memcg. | |
104 | */ | |
105 | struct memcg_shrinker_map { | |
106 | struct rcu_head rcu; | |
307ed94c | 107 | unsigned long map[]; |
0a4465d3 KT |
108 | }; |
109 | ||
33398cf2 | 110 | /* |
242c37b4 | 111 | * per-node information in memory controller. |
33398cf2 | 112 | */ |
ef8f2327 | 113 | struct mem_cgroup_per_node { |
33398cf2 | 114 | struct lruvec lruvec; |
a983b5eb | 115 | |
815744d7 JW |
116 | /* Legacy local VM stats */ |
117 | struct lruvec_stat __percpu *lruvec_stat_local; | |
118 | ||
119 | /* Subtree VM stats (batched updates) */ | |
a983b5eb JW |
120 | struct lruvec_stat __percpu *lruvec_stat_cpu; |
121 | atomic_long_t lruvec_stat[NR_VM_NODE_STAT_ITEMS]; | |
122 | ||
b4536f0c | 123 | unsigned long lru_zone_size[MAX_NR_ZONES][NR_LRU_LISTS]; |
33398cf2 | 124 | |
9da83f3f | 125 | struct mem_cgroup_reclaim_iter iter; |
33398cf2 | 126 | |
0a4465d3 | 127 | struct memcg_shrinker_map __rcu *shrinker_map; |
0a432dcb | 128 | |
33398cf2 MH |
129 | struct rb_node tree_node; /* RB tree node */ |
130 | unsigned long usage_in_excess;/* Set to the value by which */ | |
131 | /* the soft limit is exceeded*/ | |
132 | bool on_tree; | |
133 | struct mem_cgroup *memcg; /* Back pointer, we cannot */ | |
134 | /* use container_of */ | |
135 | }; | |
136 | ||
33398cf2 MH |
137 | struct mem_cgroup_threshold { |
138 | struct eventfd_ctx *eventfd; | |
139 | unsigned long threshold; | |
140 | }; | |
141 | ||
142 | /* For threshold */ | |
143 | struct mem_cgroup_threshold_ary { | |
144 | /* An array index points to threshold just below or equal to usage. */ | |
145 | int current_threshold; | |
146 | /* Size of entries[] */ | |
147 | unsigned int size; | |
148 | /* Array of thresholds */ | |
307ed94c | 149 | struct mem_cgroup_threshold entries[]; |
33398cf2 MH |
150 | }; |
151 | ||
152 | struct mem_cgroup_thresholds { | |
153 | /* Primary thresholds array */ | |
154 | struct mem_cgroup_threshold_ary *primary; | |
155 | /* | |
156 | * Spare threshold array. | |
157 | * This is needed to make mem_cgroup_unregister_event() "never fail". | |
158 | * It must be able to store at least primary->size - 1 entries. | |
159 | */ | |
160 | struct mem_cgroup_threshold_ary *spare; | |
161 | }; | |
162 | ||
567e9ab2 JW |
163 | enum memcg_kmem_state { |
164 | KMEM_NONE, | |
165 | KMEM_ALLOCATED, | |
166 | KMEM_ONLINE, | |
167 | }; | |
168 | ||
e81bf979 AL |
169 | #if defined(CONFIG_SMP) |
170 | struct memcg_padding { | |
171 | char x[0]; | |
172 | } ____cacheline_internodealigned_in_smp; | |
173 | #define MEMCG_PADDING(name) struct memcg_padding name; | |
174 | #else | |
175 | #define MEMCG_PADDING(name) | |
176 | #endif | |
177 | ||
97b27821 TH |
178 | /* |
179 | * Remember four most recent foreign writebacks with dirty pages in this | |
180 | * cgroup. Inode sharing is expected to be uncommon and, even if we miss | |
181 | * one in a given round, we're likely to catch it later if it keeps | |
182 | * foreign-dirtying, so a fairly low count should be enough. | |
183 | * | |
184 | * See mem_cgroup_track_foreign_dirty_slowpath() for details. | |
185 | */ | |
186 | #define MEMCG_CGWB_FRN_CNT 4 | |
187 | ||
188 | struct memcg_cgwb_frn { | |
189 | u64 bdi_id; /* bdi->id of the foreign inode */ | |
190 | int memcg_id; /* memcg->css.id of foreign inode */ | |
191 | u64 at; /* jiffies_64 at the time of dirtying */ | |
192 | struct wb_completion done; /* tracks in-flight foreign writebacks */ | |
193 | }; | |
194 | ||
33398cf2 MH |
195 | /* |
196 | * The memory controller data structure. The memory controller controls both | |
197 | * page cache and RSS per cgroup. We would eventually like to provide | |
198 | * statistics based on the statistics developed by Rik Van Riel for clock-pro, | |
199 | * to help the administrator determine what knobs to tune. | |
200 | */ | |
201 | struct mem_cgroup { | |
202 | struct cgroup_subsys_state css; | |
203 | ||
73f576c0 JW |
204 | /* Private memcg ID. Used to ID objects that outlive the cgroup */ |
205 | struct mem_cgroup_id id; | |
206 | ||
33398cf2 MH |
207 | /* Accounted resources */ |
208 | struct page_counter memory; | |
37e84351 | 209 | struct page_counter swap; |
0db15298 JW |
210 | |
211 | /* Legacy consumer-oriented counters */ | |
33398cf2 MH |
212 | struct page_counter memsw; |
213 | struct page_counter kmem; | |
0db15298 | 214 | struct page_counter tcpmem; |
33398cf2 | 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 | ||
1e577f97 | 242 | /* memory.events and memory.events.local */ |
472912a2 | 243 | struct cgroup_file events_file; |
1e577f97 | 244 | struct cgroup_file events_local_file; |
472912a2 | 245 | |
f3a53a3a TH |
246 | /* handle for "memory.swap.events" */ |
247 | struct cgroup_file swap_events_file; | |
248 | ||
33398cf2 MH |
249 | /* protect arrays of thresholds */ |
250 | struct mutex thresholds_lock; | |
251 | ||
252 | /* thresholds for memory usage. RCU-protected */ | |
253 | struct mem_cgroup_thresholds thresholds; | |
254 | ||
255 | /* thresholds for mem+swap usage. RCU-protected */ | |
256 | struct mem_cgroup_thresholds memsw_thresholds; | |
257 | ||
258 | /* For oom notifier event fd */ | |
259 | struct list_head oom_notify; | |
260 | ||
261 | /* | |
262 | * Should we move charges of a task when a task is moved into this | |
263 | * mem_cgroup ? And what type of charges should we move ? | |
264 | */ | |
265 | unsigned long move_charge_at_immigrate; | |
e81bf979 AL |
266 | /* taken only while moving_account > 0 */ |
267 | spinlock_t move_lock; | |
268 | unsigned long move_lock_flags; | |
269 | ||
270 | MEMCG_PADDING(_pad1_); | |
271 | ||
33398cf2 MH |
272 | /* |
273 | * set > 0 if pages under this cgroup are moving to other cgroup. | |
274 | */ | |
275 | atomic_t moving_account; | |
33398cf2 | 276 | struct task_struct *move_lock_task; |
a983b5eb | 277 | |
815744d7 JW |
278 | /* Legacy local VM stats and events */ |
279 | struct memcg_vmstats_percpu __percpu *vmstats_local; | |
280 | ||
281 | /* Subtree VM stats and events (batched updates) */ | |
871789d4 | 282 | struct memcg_vmstats_percpu __percpu *vmstats_percpu; |
e81bf979 AL |
283 | |
284 | MEMCG_PADDING(_pad2_); | |
285 | ||
871789d4 CD |
286 | atomic_long_t vmstats[MEMCG_NR_STAT]; |
287 | atomic_long_t vmevents[NR_VM_EVENT_ITEMS]; | |
42a30035 | 288 | |
815744d7 | 289 | /* memory.events */ |
42a30035 | 290 | atomic_long_t memory_events[MEMCG_NR_MEMORY_EVENTS]; |
1e577f97 | 291 | atomic_long_t memory_events_local[MEMCG_NR_MEMORY_EVENTS]; |
33398cf2 | 292 | |
d886f4e4 JW |
293 | unsigned long socket_pressure; |
294 | ||
295 | /* Legacy tcp memory accounting */ | |
0db15298 JW |
296 | bool tcpmem_active; |
297 | int tcpmem_pressure; | |
d886f4e4 | 298 | |
84c07d11 | 299 | #ifdef CONFIG_MEMCG_KMEM |
33398cf2 MH |
300 | /* Index in the kmem_cache->memcg_params.memcg_caches array */ |
301 | int kmemcg_id; | |
567e9ab2 | 302 | enum memcg_kmem_state kmem_state; |
bc2791f8 | 303 | struct list_head kmem_caches; |
33398cf2 MH |
304 | #endif |
305 | ||
33398cf2 MH |
306 | #ifdef CONFIG_CGROUP_WRITEBACK |
307 | struct list_head cgwb_list; | |
308 | struct wb_domain cgwb_domain; | |
97b27821 | 309 | struct memcg_cgwb_frn cgwb_frn[MEMCG_CGWB_FRN_CNT]; |
33398cf2 MH |
310 | #endif |
311 | ||
312 | /* List of events which userspace want to receive */ | |
313 | struct list_head event_list; | |
314 | spinlock_t event_list_lock; | |
315 | ||
87eaceb3 YS |
316 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
317 | struct deferred_split deferred_split_queue; | |
318 | #endif | |
319 | ||
33398cf2 MH |
320 | struct mem_cgroup_per_node *nodeinfo[0]; |
321 | /* WARNING: nodeinfo must be the last member here */ | |
322 | }; | |
7d828602 | 323 | |
a983b5eb JW |
324 | /* |
325 | * size of first charge trial. "32" comes from vmscan.c's magic value. | |
326 | * TODO: maybe necessary to use big numbers in big irons. | |
327 | */ | |
328 | #define MEMCG_CHARGE_BATCH 32U | |
329 | ||
7d828602 | 330 | extern struct mem_cgroup *root_mem_cgroup; |
56161634 | 331 | |
dfd2f10c KT |
332 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
333 | { | |
334 | return (memcg == root_mem_cgroup); | |
335 | } | |
336 | ||
23047a96 JW |
337 | static inline bool mem_cgroup_disabled(void) |
338 | { | |
339 | return !cgroup_subsys_enabled(memory_cgrp_subsys); | |
340 | } | |
341 | ||
1bc63fb1 CD |
342 | static inline unsigned long mem_cgroup_protection(struct mem_cgroup *memcg, |
343 | bool in_low_reclaim) | |
9783aa99 | 344 | { |
1bc63fb1 CD |
345 | if (mem_cgroup_disabled()) |
346 | return 0; | |
347 | ||
348 | if (in_low_reclaim) | |
349 | return READ_ONCE(memcg->memory.emin); | |
9783aa99 | 350 | |
1bc63fb1 CD |
351 | return max(READ_ONCE(memcg->memory.emin), |
352 | READ_ONCE(memcg->memory.elow)); | |
9783aa99 CD |
353 | } |
354 | ||
bf8d5d52 RG |
355 | enum mem_cgroup_protection mem_cgroup_protected(struct mem_cgroup *root, |
356 | struct mem_cgroup *memcg); | |
241994ed | 357 | |
3fea5a49 JW |
358 | int mem_cgroup_charge(struct page *page, struct mm_struct *mm, gfp_t gfp_mask, |
359 | bool lrucare); | |
360 | ||
0a31bc97 | 361 | void mem_cgroup_uncharge(struct page *page); |
747db954 | 362 | void mem_cgroup_uncharge_list(struct list_head *page_list); |
569b846d | 363 | |
6a93ca8f | 364 | void mem_cgroup_migrate(struct page *oldpage, struct page *newpage); |
569b846d | 365 | |
ef8f2327 MG |
366 | static struct mem_cgroup_per_node * |
367 | mem_cgroup_nodeinfo(struct mem_cgroup *memcg, int nid) | |
55779ec7 | 368 | { |
ef8f2327 | 369 | return memcg->nodeinfo[nid]; |
55779ec7 JW |
370 | } |
371 | ||
372 | /** | |
867e5e1d | 373 | * mem_cgroup_lruvec - get the lru list vector for a memcg & node |
55779ec7 JW |
374 | * @memcg: memcg of the wanted lruvec |
375 | * | |
867e5e1d JW |
376 | * Returns the lru list vector holding pages for a given @memcg & |
377 | * @node combination. This can be the node lruvec, if the memory | |
378 | * controller is disabled. | |
55779ec7 | 379 | */ |
867e5e1d JW |
380 | static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg, |
381 | struct pglist_data *pgdat) | |
55779ec7 | 382 | { |
ef8f2327 | 383 | struct mem_cgroup_per_node *mz; |
55779ec7 JW |
384 | struct lruvec *lruvec; |
385 | ||
386 | if (mem_cgroup_disabled()) { | |
867e5e1d | 387 | lruvec = &pgdat->__lruvec; |
55779ec7 JW |
388 | goto out; |
389 | } | |
390 | ||
1b05117d JW |
391 | if (!memcg) |
392 | memcg = root_mem_cgroup; | |
393 | ||
ef8f2327 | 394 | mz = mem_cgroup_nodeinfo(memcg, pgdat->node_id); |
55779ec7 JW |
395 | lruvec = &mz->lruvec; |
396 | out: | |
397 | /* | |
398 | * Since a node can be onlined after the mem_cgroup was created, | |
599d0c95 | 399 | * we have to be prepared to initialize lruvec->pgdat here; |
55779ec7 JW |
400 | * and if offlined then reonlined, we need to reinitialize it. |
401 | */ | |
ef8f2327 MG |
402 | if (unlikely(lruvec->pgdat != pgdat)) |
403 | lruvec->pgdat = pgdat; | |
55779ec7 JW |
404 | return lruvec; |
405 | } | |
406 | ||
599d0c95 | 407 | struct lruvec *mem_cgroup_page_lruvec(struct page *, struct pglist_data *); |
c9b0ed51 | 408 | |
64219994 | 409 | struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
e993d905 | 410 | |
d46eb14b SB |
411 | struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm); |
412 | ||
f745c6f5 SB |
413 | struct mem_cgroup *get_mem_cgroup_from_page(struct page *page); |
414 | ||
33398cf2 MH |
415 | static inline |
416 | struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){ | |
417 | return css ? container_of(css, struct mem_cgroup, css) : NULL; | |
418 | } | |
419 | ||
dc0b5864 RG |
420 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
421 | { | |
d46eb14b SB |
422 | if (memcg) |
423 | css_put(&memcg->css); | |
dc0b5864 RG |
424 | } |
425 | ||
8e8ae645 JW |
426 | #define mem_cgroup_from_counter(counter, member) \ |
427 | container_of(counter, struct mem_cgroup, member) | |
428 | ||
33398cf2 MH |
429 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
430 | struct mem_cgroup *, | |
431 | struct mem_cgroup_reclaim_cookie *); | |
432 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); | |
7c5f64f8 VD |
433 | int mem_cgroup_scan_tasks(struct mem_cgroup *, |
434 | int (*)(struct task_struct *, void *), void *); | |
33398cf2 | 435 | |
23047a96 JW |
436 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
437 | { | |
438 | if (mem_cgroup_disabled()) | |
439 | return 0; | |
440 | ||
73f576c0 | 441 | return memcg->id.id; |
23047a96 | 442 | } |
73f576c0 | 443 | struct mem_cgroup *mem_cgroup_from_id(unsigned short id); |
23047a96 | 444 | |
aa9694bb CD |
445 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
446 | { | |
447 | return mem_cgroup_from_css(seq_css(m)); | |
448 | } | |
449 | ||
2262185c RG |
450 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
451 | { | |
452 | struct mem_cgroup_per_node *mz; | |
453 | ||
454 | if (mem_cgroup_disabled()) | |
455 | return NULL; | |
456 | ||
457 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
458 | return mz->memcg; | |
459 | } | |
460 | ||
8e8ae645 JW |
461 | /** |
462 | * parent_mem_cgroup - find the accounting parent of a memcg | |
463 | * @memcg: memcg whose parent to find | |
464 | * | |
465 | * Returns the parent memcg, or NULL if this is the root or the memory | |
466 | * controller is in legacy no-hierarchy mode. | |
467 | */ | |
468 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) | |
469 | { | |
470 | if (!memcg->memory.parent) | |
471 | return NULL; | |
472 | return mem_cgroup_from_counter(memcg->memory.parent, memory); | |
473 | } | |
474 | ||
33398cf2 MH |
475 | static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, |
476 | struct mem_cgroup *root) | |
477 | { | |
478 | if (root == memcg) | |
479 | return true; | |
480 | if (!root->use_hierarchy) | |
481 | return false; | |
482 | return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup); | |
483 | } | |
e1aab161 | 484 | |
2314b42d JW |
485 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
486 | struct mem_cgroup *memcg) | |
2e4d4091 | 487 | { |
587af308 | 488 | struct mem_cgroup *task_memcg; |
413918bb | 489 | bool match = false; |
c3ac9a8a | 490 | |
2e4d4091 | 491 | rcu_read_lock(); |
587af308 | 492 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
413918bb | 493 | if (task_memcg) |
2314b42d | 494 | match = mem_cgroup_is_descendant(task_memcg, memcg); |
2e4d4091 | 495 | rcu_read_unlock(); |
c3ac9a8a | 496 | return match; |
2e4d4091 | 497 | } |
8a9f3ccd | 498 | |
64219994 | 499 | struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page); |
2fc04524 | 500 | ino_t page_cgroup_ino(struct page *page); |
d324236b | 501 | |
eb01aaab VD |
502 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
503 | { | |
504 | if (mem_cgroup_disabled()) | |
505 | return true; | |
506 | return !!(memcg->css.flags & CSS_ONLINE); | |
507 | } | |
508 | ||
58ae83db KH |
509 | /* |
510 | * For memory reclaim. | |
511 | */ | |
889976db | 512 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
33398cf2 MH |
513 | |
514 | void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, | |
b4536f0c | 515 | int zid, int nr_pages); |
33398cf2 | 516 | |
b4536f0c MH |
517 | static inline |
518 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
519 | enum lru_list lru, int zone_idx) | |
520 | { | |
521 | struct mem_cgroup_per_node *mz; | |
522 | ||
523 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
524 | return mz->lru_zone_size[zone_idx][lru]; | |
33398cf2 MH |
525 | } |
526 | ||
b23afb93 TH |
527 | void mem_cgroup_handle_over_high(void); |
528 | ||
bbec2e15 | 529 | unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg); |
7c5f64f8 | 530 | |
9783aa99 CD |
531 | unsigned long mem_cgroup_size(struct mem_cgroup *memcg); |
532 | ||
f0c867d9 | 533 | void mem_cgroup_print_oom_context(struct mem_cgroup *memcg, |
64219994 | 534 | struct task_struct *p); |
58ae83db | 535 | |
f0c867d9 | 536 | void mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg); |
537 | ||
29ef680a | 538 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 | 539 | { |
29ef680a MH |
540 | WARN_ON(current->in_user_fault); |
541 | current->in_user_fault = 1; | |
519e5247 JW |
542 | } |
543 | ||
29ef680a | 544 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 | 545 | { |
29ef680a MH |
546 | WARN_ON(!current->in_user_fault); |
547 | current->in_user_fault = 0; | |
519e5247 JW |
548 | } |
549 | ||
3812c8c8 JW |
550 | static inline bool task_in_memcg_oom(struct task_struct *p) |
551 | { | |
626ebc41 | 552 | return p->memcg_in_oom; |
3812c8c8 JW |
553 | } |
554 | ||
49426420 | 555 | bool mem_cgroup_oom_synchronize(bool wait); |
3d8b38eb RG |
556 | struct mem_cgroup *mem_cgroup_get_oom_group(struct task_struct *victim, |
557 | struct mem_cgroup *oom_domain); | |
558 | void mem_cgroup_print_oom_group(struct mem_cgroup *memcg); | |
3812c8c8 | 559 | |
c255a458 | 560 | #ifdef CONFIG_MEMCG_SWAP |
eccb52e7 | 561 | extern bool cgroup_memory_noswap; |
c077719b | 562 | #endif |
f8d66542 | 563 | |
739f79fc JW |
564 | struct mem_cgroup *lock_page_memcg(struct page *page); |
565 | void __unlock_page_memcg(struct mem_cgroup *memcg); | |
62cccb8c | 566 | void unlock_page_memcg(struct page *page); |
d7365e78 | 567 | |
42a30035 JW |
568 | /* |
569 | * idx can be of type enum memcg_stat_item or node_stat_item. | |
570 | * Keep in sync with memcg_exact_page_state(). | |
571 | */ | |
572 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx) | |
573 | { | |
574 | long x = atomic_long_read(&memcg->vmstats[idx]); | |
575 | #ifdef CONFIG_SMP | |
576 | if (x < 0) | |
577 | x = 0; | |
578 | #endif | |
579 | return x; | |
580 | } | |
581 | ||
0b3d6e6f GT |
582 | /* |
583 | * idx can be of type enum memcg_stat_item or node_stat_item. | |
584 | * Keep in sync with memcg_exact_page_state(). | |
585 | */ | |
205b20cc JW |
586 | static inline unsigned long memcg_page_state_local(struct mem_cgroup *memcg, |
587 | int idx) | |
2a2e4885 | 588 | { |
815744d7 JW |
589 | long x = 0; |
590 | int cpu; | |
591 | ||
592 | for_each_possible_cpu(cpu) | |
593 | x += per_cpu(memcg->vmstats_local->stat[idx], cpu); | |
a983b5eb JW |
594 | #ifdef CONFIG_SMP |
595 | if (x < 0) | |
596 | x = 0; | |
597 | #endif | |
598 | return x; | |
2a2e4885 JW |
599 | } |
600 | ||
db9adbcb | 601 | void __mod_memcg_state(struct mem_cgroup *memcg, int idx, int val); |
2a2e4885 | 602 | |
04fecbf5 | 603 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 604 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 605 | int idx, int val) |
2a2e4885 | 606 | { |
c3cc3911 JW |
607 | unsigned long flags; |
608 | ||
609 | local_irq_save(flags); | |
a983b5eb | 610 | __mod_memcg_state(memcg, idx, val); |
c3cc3911 | 611 | local_irq_restore(flags); |
2a2e4885 JW |
612 | } |
613 | ||
33398cf2 | 614 | /** |
ccda7f43 | 615 | * mod_memcg_page_state - update page state statistics |
62cccb8c | 616 | * @page: the page |
33398cf2 MH |
617 | * @idx: page state item to account |
618 | * @val: number of pages (positive or negative) | |
619 | * | |
fdf1cdb9 JW |
620 | * The @page must be locked or the caller must use lock_page_memcg() |
621 | * to prevent double accounting when the page is concurrently being | |
622 | * moved to another memcg: | |
81f8c3a4 | 623 | * |
fdf1cdb9 | 624 | * lock_page(page) or lock_page_memcg(page) |
81f8c3a4 | 625 | * if (TestClearPageState(page)) |
ccda7f43 | 626 | * mod_memcg_page_state(page, state, -1); |
fdf1cdb9 | 627 | * unlock_page(page) or unlock_page_memcg(page) |
2a2e4885 JW |
628 | * |
629 | * Kernel pages are an exception to this, since they'll never move. | |
33398cf2 | 630 | */ |
00f3ca2c | 631 | static inline void __mod_memcg_page_state(struct page *page, |
04fecbf5 | 632 | int idx, int val) |
00f3ca2c JW |
633 | { |
634 | if (page->mem_cgroup) | |
635 | __mod_memcg_state(page->mem_cgroup, idx, val); | |
636 | } | |
637 | ||
ccda7f43 | 638 | static inline void mod_memcg_page_state(struct page *page, |
04fecbf5 | 639 | int idx, int val) |
33398cf2 | 640 | { |
62cccb8c | 641 | if (page->mem_cgroup) |
ccda7f43 | 642 | mod_memcg_state(page->mem_cgroup, idx, val); |
33398cf2 MH |
643 | } |
644 | ||
42a30035 JW |
645 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
646 | enum node_stat_item idx) | |
647 | { | |
648 | struct mem_cgroup_per_node *pn; | |
649 | long x; | |
650 | ||
651 | if (mem_cgroup_disabled()) | |
652 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
653 | ||
654 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
655 | x = atomic_long_read(&pn->lruvec_stat[idx]); | |
656 | #ifdef CONFIG_SMP | |
657 | if (x < 0) | |
658 | x = 0; | |
659 | #endif | |
660 | return x; | |
661 | } | |
662 | ||
205b20cc JW |
663 | static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
664 | enum node_stat_item idx) | |
2a7106f2 | 665 | { |
00f3ca2c | 666 | struct mem_cgroup_per_node *pn; |
815744d7 JW |
667 | long x = 0; |
668 | int cpu; | |
00f3ca2c JW |
669 | |
670 | if (mem_cgroup_disabled()) | |
671 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
672 | ||
673 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
815744d7 JW |
674 | for_each_possible_cpu(cpu) |
675 | x += per_cpu(pn->lruvec_stat_local->count[idx], cpu); | |
a983b5eb JW |
676 | #ifdef CONFIG_SMP |
677 | if (x < 0) | |
678 | x = 0; | |
679 | #endif | |
680 | return x; | |
2a7106f2 GT |
681 | } |
682 | ||
db9adbcb JW |
683 | void __mod_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx, |
684 | int val); | |
ec9f0238 | 685 | void __mod_lruvec_slab_state(void *p, enum node_stat_item idx, int val); |
8380ce47 | 686 | void mod_memcg_obj_state(void *p, int idx, int val); |
00f3ca2c JW |
687 | |
688 | static inline void mod_lruvec_state(struct lruvec *lruvec, | |
689 | enum node_stat_item idx, int val) | |
690 | { | |
c3cc3911 JW |
691 | unsigned long flags; |
692 | ||
693 | local_irq_save(flags); | |
28454265 | 694 | __mod_lruvec_state(lruvec, idx, val); |
c3cc3911 | 695 | local_irq_restore(flags); |
00f3ca2c JW |
696 | } |
697 | ||
698 | static inline void __mod_lruvec_page_state(struct page *page, | |
699 | enum node_stat_item idx, int val) | |
700 | { | |
9da7b521 | 701 | struct page *head = compound_head(page); /* rmap on tail pages */ |
28454265 JW |
702 | pg_data_t *pgdat = page_pgdat(page); |
703 | struct lruvec *lruvec; | |
00f3ca2c | 704 | |
28454265 | 705 | /* Untracked pages have no memcg, no lruvec. Update only the node */ |
9da7b521 | 706 | if (!head->mem_cgroup) { |
28454265 | 707 | __mod_node_page_state(pgdat, idx, val); |
00f3ca2c | 708 | return; |
28454265 JW |
709 | } |
710 | ||
9da7b521 | 711 | lruvec = mem_cgroup_lruvec(head->mem_cgroup, pgdat); |
28454265 | 712 | __mod_lruvec_state(lruvec, idx, val); |
00f3ca2c JW |
713 | } |
714 | ||
715 | static inline void mod_lruvec_page_state(struct page *page, | |
716 | enum node_stat_item idx, int val) | |
717 | { | |
c3cc3911 JW |
718 | unsigned long flags; |
719 | ||
720 | local_irq_save(flags); | |
28454265 | 721 | __mod_lruvec_page_state(page, idx, val); |
c3cc3911 | 722 | local_irq_restore(flags); |
2a7106f2 GT |
723 | } |
724 | ||
ef8f2327 | 725 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
726 | gfp_t gfp_mask, |
727 | unsigned long *total_scanned); | |
a63d83f4 | 728 | |
db9adbcb JW |
729 | void __count_memcg_events(struct mem_cgroup *memcg, enum vm_event_item idx, |
730 | unsigned long count); | |
c9019e9b | 731 | |
2262185c | 732 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
e27be240 JW |
733 | enum vm_event_item idx, |
734 | unsigned long count) | |
2262185c | 735 | { |
c3cc3911 JW |
736 | unsigned long flags; |
737 | ||
738 | local_irq_save(flags); | |
a983b5eb | 739 | __count_memcg_events(memcg, idx, count); |
c3cc3911 | 740 | local_irq_restore(flags); |
2262185c RG |
741 | } |
742 | ||
743 | static inline void count_memcg_page_event(struct page *page, | |
e27be240 | 744 | enum vm_event_item idx) |
2262185c RG |
745 | { |
746 | if (page->mem_cgroup) | |
747 | count_memcg_events(page->mem_cgroup, idx, 1); | |
748 | } | |
749 | ||
750 | static inline void count_memcg_event_mm(struct mm_struct *mm, | |
751 | enum vm_event_item idx) | |
68ae564b | 752 | { |
33398cf2 MH |
753 | struct mem_cgroup *memcg; |
754 | ||
68ae564b DR |
755 | if (mem_cgroup_disabled()) |
756 | return; | |
33398cf2 MH |
757 | |
758 | rcu_read_lock(); | |
759 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
fe6bdfc8 | 760 | if (likely(memcg)) |
c9019e9b | 761 | count_memcg_events(memcg, idx, 1); |
33398cf2 | 762 | rcu_read_unlock(); |
68ae564b | 763 | } |
c9019e9b | 764 | |
e27be240 JW |
765 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
766 | enum memcg_memory_event event) | |
c9019e9b | 767 | { |
1e577f97 SB |
768 | atomic_long_inc(&memcg->memory_events_local[event]); |
769 | cgroup_file_notify(&memcg->events_local_file); | |
770 | ||
9852ae3f CD |
771 | do { |
772 | atomic_long_inc(&memcg->memory_events[event]); | |
773 | cgroup_file_notify(&memcg->events_file); | |
774 | ||
04fd61a4 YS |
775 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys)) |
776 | break; | |
9852ae3f CD |
777 | if (cgrp_dfl_root.flags & CGRP_ROOT_MEMORY_LOCAL_EVENTS) |
778 | break; | |
779 | } while ((memcg = parent_mem_cgroup(memcg)) && | |
780 | !mem_cgroup_is_root(memcg)); | |
c9019e9b JW |
781 | } |
782 | ||
fe6bdfc8 RG |
783 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
784 | enum memcg_memory_event event) | |
785 | { | |
786 | struct mem_cgroup *memcg; | |
787 | ||
788 | if (mem_cgroup_disabled()) | |
789 | return; | |
790 | ||
791 | rcu_read_lock(); | |
792 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
793 | if (likely(memcg)) | |
794 | memcg_memory_event(memcg, event); | |
795 | rcu_read_unlock(); | |
796 | } | |
797 | ||
ca3e0214 | 798 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
e94c8a9c | 799 | void mem_cgroup_split_huge_fixup(struct page *head); |
ca3e0214 KH |
800 | #endif |
801 | ||
c255a458 | 802 | #else /* CONFIG_MEMCG */ |
23047a96 JW |
803 | |
804 | #define MEM_CGROUP_ID_SHIFT 0 | |
805 | #define MEM_CGROUP_ID_MAX 0 | |
806 | ||
7a81b88c KH |
807 | struct mem_cgroup; |
808 | ||
dfd2f10c KT |
809 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
810 | { | |
811 | return true; | |
812 | } | |
813 | ||
23047a96 JW |
814 | static inline bool mem_cgroup_disabled(void) |
815 | { | |
816 | return true; | |
817 | } | |
818 | ||
e27be240 JW |
819 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
820 | enum memcg_memory_event event) | |
241994ed JW |
821 | { |
822 | } | |
823 | ||
fe6bdfc8 RG |
824 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
825 | enum memcg_memory_event event) | |
826 | { | |
827 | } | |
828 | ||
1bc63fb1 CD |
829 | static inline unsigned long mem_cgroup_protection(struct mem_cgroup *memcg, |
830 | bool in_low_reclaim) | |
9783aa99 | 831 | { |
1bc63fb1 | 832 | return 0; |
9783aa99 CD |
833 | } |
834 | ||
bf8d5d52 RG |
835 | static inline enum mem_cgroup_protection mem_cgroup_protected( |
836 | struct mem_cgroup *root, struct mem_cgroup *memcg) | |
241994ed | 837 | { |
bf8d5d52 | 838 | return MEMCG_PROT_NONE; |
241994ed JW |
839 | } |
840 | ||
3fea5a49 JW |
841 | static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm, |
842 | gfp_t gfp_mask, bool lrucare) | |
843 | { | |
844 | return 0; | |
845 | } | |
846 | ||
0a31bc97 | 847 | static inline void mem_cgroup_uncharge(struct page *page) |
569b846d KH |
848 | { |
849 | } | |
850 | ||
747db954 | 851 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
8a9f3ccd BS |
852 | { |
853 | } | |
854 | ||
6a93ca8f | 855 | static inline void mem_cgroup_migrate(struct page *old, struct page *new) |
69029cd5 KH |
856 | { |
857 | } | |
858 | ||
867e5e1d JW |
859 | static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg, |
860 | struct pglist_data *pgdat) | |
08e552c6 | 861 | { |
867e5e1d | 862 | return &pgdat->__lruvec; |
08e552c6 KH |
863 | } |
864 | ||
fa9add64 | 865 | static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, |
599d0c95 | 866 | struct pglist_data *pgdat) |
66e1707b | 867 | { |
867e5e1d | 868 | return &pgdat->__lruvec; |
66e1707b BS |
869 | } |
870 | ||
b910718a JW |
871 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) |
872 | { | |
873 | return NULL; | |
874 | } | |
875 | ||
587af308 | 876 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
c0ff4b85 | 877 | struct mem_cgroup *memcg) |
bed7161a | 878 | { |
587af308 | 879 | return true; |
bed7161a BS |
880 | } |
881 | ||
d46eb14b SB |
882 | static inline struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm) |
883 | { | |
884 | return NULL; | |
885 | } | |
886 | ||
f745c6f5 SB |
887 | static inline struct mem_cgroup *get_mem_cgroup_from_page(struct page *page) |
888 | { | |
889 | return NULL; | |
890 | } | |
891 | ||
dc0b5864 RG |
892 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
893 | { | |
894 | } | |
895 | ||
5660048c JW |
896 | static inline struct mem_cgroup * |
897 | mem_cgroup_iter(struct mem_cgroup *root, | |
898 | struct mem_cgroup *prev, | |
899 | struct mem_cgroup_reclaim_cookie *reclaim) | |
900 | { | |
901 | return NULL; | |
902 | } | |
903 | ||
904 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
905 | struct mem_cgroup *prev) | |
906 | { | |
907 | } | |
908 | ||
7c5f64f8 VD |
909 | static inline int mem_cgroup_scan_tasks(struct mem_cgroup *memcg, |
910 | int (*fn)(struct task_struct *, void *), void *arg) | |
911 | { | |
912 | return 0; | |
913 | } | |
914 | ||
23047a96 | 915 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
f8d66542 | 916 | { |
23047a96 JW |
917 | return 0; |
918 | } | |
919 | ||
920 | static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id) | |
921 | { | |
922 | WARN_ON_ONCE(id); | |
923 | /* XXX: This should always return root_mem_cgroup */ | |
924 | return NULL; | |
f8d66542 | 925 | } |
a636b327 | 926 | |
aa9694bb CD |
927 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
928 | { | |
929 | return NULL; | |
930 | } | |
931 | ||
2262185c RG |
932 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
933 | { | |
934 | return NULL; | |
935 | } | |
936 | ||
eb01aaab | 937 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
14797e23 | 938 | { |
13308ca9 | 939 | return true; |
14797e23 KM |
940 | } |
941 | ||
b4536f0c MH |
942 | static inline |
943 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
944 | enum lru_list lru, int zone_idx) | |
945 | { | |
946 | return 0; | |
947 | } | |
a3d8e054 | 948 | |
bbec2e15 | 949 | static inline unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg) |
7c5f64f8 VD |
950 | { |
951 | return 0; | |
952 | } | |
953 | ||
9783aa99 CD |
954 | static inline unsigned long mem_cgroup_size(struct mem_cgroup *memcg) |
955 | { | |
956 | return 0; | |
957 | } | |
958 | ||
e222432b | 959 | static inline void |
f0c867d9 | 960 | mem_cgroup_print_oom_context(struct mem_cgroup *memcg, struct task_struct *p) |
961 | { | |
962 | } | |
963 | ||
964 | static inline void | |
965 | mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg) | |
e222432b BS |
966 | { |
967 | } | |
968 | ||
739f79fc JW |
969 | static inline struct mem_cgroup *lock_page_memcg(struct page *page) |
970 | { | |
971 | return NULL; | |
972 | } | |
973 | ||
974 | static inline void __unlock_page_memcg(struct mem_cgroup *memcg) | |
89c06bd5 KH |
975 | { |
976 | } | |
977 | ||
62cccb8c | 978 | static inline void unlock_page_memcg(struct page *page) |
89c06bd5 KH |
979 | { |
980 | } | |
981 | ||
b23afb93 TH |
982 | static inline void mem_cgroup_handle_over_high(void) |
983 | { | |
984 | } | |
985 | ||
29ef680a | 986 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 JW |
987 | { |
988 | } | |
989 | ||
29ef680a | 990 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 JW |
991 | { |
992 | } | |
993 | ||
3812c8c8 JW |
994 | static inline bool task_in_memcg_oom(struct task_struct *p) |
995 | { | |
996 | return false; | |
997 | } | |
998 | ||
49426420 | 999 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
3812c8c8 JW |
1000 | { |
1001 | return false; | |
1002 | } | |
1003 | ||
3d8b38eb RG |
1004 | static inline struct mem_cgroup *mem_cgroup_get_oom_group( |
1005 | struct task_struct *victim, struct mem_cgroup *oom_domain) | |
1006 | { | |
1007 | return NULL; | |
1008 | } | |
1009 | ||
1010 | static inline void mem_cgroup_print_oom_group(struct mem_cgroup *memcg) | |
1011 | { | |
1012 | } | |
1013 | ||
42a30035 JW |
1014 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx) |
1015 | { | |
1016 | return 0; | |
1017 | } | |
1018 | ||
205b20cc JW |
1019 | static inline unsigned long memcg_page_state_local(struct mem_cgroup *memcg, |
1020 | int idx) | |
2a2e4885 JW |
1021 | { |
1022 | return 0; | |
1023 | } | |
1024 | ||
00f3ca2c | 1025 | static inline void __mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1026 | int idx, |
00f3ca2c | 1027 | int nr) |
2a2e4885 JW |
1028 | { |
1029 | } | |
1030 | ||
00f3ca2c | 1031 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1032 | int idx, |
00f3ca2c | 1033 | int nr) |
2a2e4885 JW |
1034 | { |
1035 | } | |
1036 | ||
00f3ca2c | 1037 | static inline void __mod_memcg_page_state(struct page *page, |
04fecbf5 | 1038 | int idx, |
00f3ca2c | 1039 | int nr) |
2a2e4885 JW |
1040 | { |
1041 | } | |
1042 | ||
ccda7f43 | 1043 | static inline void mod_memcg_page_state(struct page *page, |
04fecbf5 | 1044 | int idx, |
ccda7f43 | 1045 | int nr) |
553af430 JW |
1046 | { |
1047 | } | |
1048 | ||
42a30035 JW |
1049 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
1050 | enum node_stat_item idx) | |
1051 | { | |
1052 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
1053 | } | |
1054 | ||
205b20cc JW |
1055 | static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
1056 | enum node_stat_item idx) | |
2a7106f2 | 1057 | { |
00f3ca2c | 1058 | return node_page_state(lruvec_pgdat(lruvec), idx); |
2a7106f2 GT |
1059 | } |
1060 | ||
00f3ca2c JW |
1061 | static inline void __mod_lruvec_state(struct lruvec *lruvec, |
1062 | enum node_stat_item idx, int val) | |
d69b042f | 1063 | { |
00f3ca2c JW |
1064 | __mod_node_page_state(lruvec_pgdat(lruvec), idx, val); |
1065 | } | |
1066 | ||
1067 | static inline void mod_lruvec_state(struct lruvec *lruvec, | |
1068 | enum node_stat_item idx, int val) | |
1069 | { | |
1070 | mod_node_page_state(lruvec_pgdat(lruvec), idx, val); | |
1071 | } | |
1072 | ||
1073 | static inline void __mod_lruvec_page_state(struct page *page, | |
1074 | enum node_stat_item idx, int val) | |
1075 | { | |
1076 | __mod_node_page_state(page_pgdat(page), idx, val); | |
1077 | } | |
1078 | ||
1079 | static inline void mod_lruvec_page_state(struct page *page, | |
1080 | enum node_stat_item idx, int val) | |
1081 | { | |
1082 | mod_node_page_state(page_pgdat(page), idx, val); | |
d69b042f BS |
1083 | } |
1084 | ||
ec9f0238 RG |
1085 | static inline void __mod_lruvec_slab_state(void *p, enum node_stat_item idx, |
1086 | int val) | |
1087 | { | |
1088 | struct page *page = virt_to_head_page(p); | |
1089 | ||
1090 | __mod_node_page_state(page_pgdat(page), idx, val); | |
1091 | } | |
1092 | ||
8380ce47 RG |
1093 | static inline void mod_memcg_obj_state(void *p, int idx, int val) |
1094 | { | |
1095 | } | |
1096 | ||
4e416953 | 1097 | static inline |
ef8f2327 | 1098 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
1099 | gfp_t gfp_mask, |
1100 | unsigned long *total_scanned) | |
4e416953 | 1101 | { |
0608f43d | 1102 | return 0; |
4e416953 BS |
1103 | } |
1104 | ||
e94c8a9c | 1105 | static inline void mem_cgroup_split_huge_fixup(struct page *head) |
ca3e0214 KH |
1106 | { |
1107 | } | |
1108 | ||
2262185c RG |
1109 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
1110 | enum vm_event_item idx, | |
1111 | unsigned long count) | |
1112 | { | |
1113 | } | |
1114 | ||
9851ac13 KT |
1115 | static inline void __count_memcg_events(struct mem_cgroup *memcg, |
1116 | enum vm_event_item idx, | |
1117 | unsigned long count) | |
1118 | { | |
1119 | } | |
1120 | ||
2262185c | 1121 | static inline void count_memcg_page_event(struct page *page, |
04fecbf5 | 1122 | int idx) |
2262185c RG |
1123 | { |
1124 | } | |
1125 | ||
456f998e | 1126 | static inline |
2262185c | 1127 | void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx) |
456f998e YH |
1128 | { |
1129 | } | |
c255a458 | 1130 | #endif /* CONFIG_MEMCG */ |
78fb7466 | 1131 | |
04fecbf5 | 1132 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1133 | static inline void __inc_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1134 | int idx) |
00f3ca2c JW |
1135 | { |
1136 | __mod_memcg_state(memcg, idx, 1); | |
1137 | } | |
1138 | ||
04fecbf5 | 1139 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1140 | static inline void __dec_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1141 | int idx) |
00f3ca2c JW |
1142 | { |
1143 | __mod_memcg_state(memcg, idx, -1); | |
1144 | } | |
1145 | ||
04fecbf5 | 1146 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1147 | static inline void __inc_memcg_page_state(struct page *page, |
04fecbf5 | 1148 | int idx) |
00f3ca2c JW |
1149 | { |
1150 | __mod_memcg_page_state(page, idx, 1); | |
1151 | } | |
1152 | ||
04fecbf5 | 1153 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1154 | static inline void __dec_memcg_page_state(struct page *page, |
04fecbf5 | 1155 | int idx) |
00f3ca2c JW |
1156 | { |
1157 | __mod_memcg_page_state(page, idx, -1); | |
1158 | } | |
1159 | ||
1160 | static inline void __inc_lruvec_state(struct lruvec *lruvec, | |
1161 | enum node_stat_item idx) | |
1162 | { | |
1163 | __mod_lruvec_state(lruvec, idx, 1); | |
1164 | } | |
1165 | ||
1166 | static inline void __dec_lruvec_state(struct lruvec *lruvec, | |
1167 | enum node_stat_item idx) | |
1168 | { | |
1169 | __mod_lruvec_state(lruvec, idx, -1); | |
1170 | } | |
1171 | ||
1172 | static inline void __inc_lruvec_page_state(struct page *page, | |
1173 | enum node_stat_item idx) | |
1174 | { | |
1175 | __mod_lruvec_page_state(page, idx, 1); | |
1176 | } | |
1177 | ||
1178 | static inline void __dec_lruvec_page_state(struct page *page, | |
1179 | enum node_stat_item idx) | |
1180 | { | |
1181 | __mod_lruvec_page_state(page, idx, -1); | |
1182 | } | |
1183 | ||
ec9f0238 RG |
1184 | static inline void __inc_lruvec_slab_state(void *p, enum node_stat_item idx) |
1185 | { | |
1186 | __mod_lruvec_slab_state(p, idx, 1); | |
1187 | } | |
1188 | ||
1189 | static inline void __dec_lruvec_slab_state(void *p, enum node_stat_item idx) | |
1190 | { | |
1191 | __mod_lruvec_slab_state(p, idx, -1); | |
1192 | } | |
1193 | ||
04fecbf5 | 1194 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1195 | static inline void inc_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1196 | int idx) |
00f3ca2c JW |
1197 | { |
1198 | mod_memcg_state(memcg, idx, 1); | |
1199 | } | |
1200 | ||
04fecbf5 | 1201 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1202 | static inline void dec_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1203 | int idx) |
00f3ca2c JW |
1204 | { |
1205 | mod_memcg_state(memcg, idx, -1); | |
1206 | } | |
1207 | ||
04fecbf5 | 1208 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1209 | static inline void inc_memcg_page_state(struct page *page, |
04fecbf5 | 1210 | int idx) |
00f3ca2c JW |
1211 | { |
1212 | mod_memcg_page_state(page, idx, 1); | |
1213 | } | |
1214 | ||
04fecbf5 | 1215 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1216 | static inline void dec_memcg_page_state(struct page *page, |
04fecbf5 | 1217 | int idx) |
00f3ca2c JW |
1218 | { |
1219 | mod_memcg_page_state(page, idx, -1); | |
1220 | } | |
1221 | ||
1222 | static inline void inc_lruvec_state(struct lruvec *lruvec, | |
1223 | enum node_stat_item idx) | |
1224 | { | |
1225 | mod_lruvec_state(lruvec, idx, 1); | |
1226 | } | |
1227 | ||
1228 | static inline void dec_lruvec_state(struct lruvec *lruvec, | |
1229 | enum node_stat_item idx) | |
1230 | { | |
1231 | mod_lruvec_state(lruvec, idx, -1); | |
1232 | } | |
1233 | ||
1234 | static inline void inc_lruvec_page_state(struct page *page, | |
1235 | enum node_stat_item idx) | |
1236 | { | |
1237 | mod_lruvec_page_state(page, idx, 1); | |
1238 | } | |
1239 | ||
1240 | static inline void dec_lruvec_page_state(struct page *page, | |
1241 | enum node_stat_item idx) | |
1242 | { | |
1243 | mod_lruvec_page_state(page, idx, -1); | |
1244 | } | |
1245 | ||
52ebea74 | 1246 | #ifdef CONFIG_CGROUP_WRITEBACK |
841710aa | 1247 | |
841710aa | 1248 | struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb); |
c5edf9cd TH |
1249 | void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages, |
1250 | unsigned long *pheadroom, unsigned long *pdirty, | |
1251 | unsigned long *pwriteback); | |
841710aa | 1252 | |
97b27821 TH |
1253 | void mem_cgroup_track_foreign_dirty_slowpath(struct page *page, |
1254 | struct bdi_writeback *wb); | |
1255 | ||
1256 | static inline void mem_cgroup_track_foreign_dirty(struct page *page, | |
1257 | struct bdi_writeback *wb) | |
1258 | { | |
08d1d0e6 BH |
1259 | if (mem_cgroup_disabled()) |
1260 | return; | |
1261 | ||
97b27821 TH |
1262 | if (unlikely(&page->mem_cgroup->css != wb->memcg_css)) |
1263 | mem_cgroup_track_foreign_dirty_slowpath(page, wb); | |
1264 | } | |
1265 | ||
1266 | void mem_cgroup_flush_foreign(struct bdi_writeback *wb); | |
1267 | ||
841710aa TH |
1268 | #else /* CONFIG_CGROUP_WRITEBACK */ |
1269 | ||
1270 | static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb) | |
1271 | { | |
1272 | return NULL; | |
1273 | } | |
1274 | ||
c2aa723a | 1275 | static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb, |
c5edf9cd TH |
1276 | unsigned long *pfilepages, |
1277 | unsigned long *pheadroom, | |
c2aa723a TH |
1278 | unsigned long *pdirty, |
1279 | unsigned long *pwriteback) | |
1280 | { | |
1281 | } | |
1282 | ||
97b27821 TH |
1283 | static inline void mem_cgroup_track_foreign_dirty(struct page *page, |
1284 | struct bdi_writeback *wb) | |
1285 | { | |
1286 | } | |
1287 | ||
1288 | static inline void mem_cgroup_flush_foreign(struct bdi_writeback *wb) | |
1289 | { | |
1290 | } | |
1291 | ||
841710aa | 1292 | #endif /* CONFIG_CGROUP_WRITEBACK */ |
52ebea74 | 1293 | |
e1aab161 | 1294 | struct sock; |
baac50bb JW |
1295 | bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); |
1296 | void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); | |
d886f4e4 | 1297 | #ifdef CONFIG_MEMCG |
ef12947c JW |
1298 | extern struct static_key_false memcg_sockets_enabled_key; |
1299 | #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key) | |
2d758073 JW |
1300 | void mem_cgroup_sk_alloc(struct sock *sk); |
1301 | void mem_cgroup_sk_free(struct sock *sk); | |
baac50bb | 1302 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c | 1303 | { |
0db15298 | 1304 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && memcg->tcpmem_pressure) |
8e8ae645 | 1305 | return true; |
8e8ae645 JW |
1306 | do { |
1307 | if (time_before(jiffies, memcg->socket_pressure)) | |
1308 | return true; | |
1309 | } while ((memcg = parent_mem_cgroup(memcg))); | |
1310 | return false; | |
e805605c | 1311 | } |
0a432dcb YS |
1312 | |
1313 | extern int memcg_expand_shrinker_maps(int new_id); | |
1314 | ||
1315 | extern void memcg_set_shrinker_bit(struct mem_cgroup *memcg, | |
1316 | int nid, int shrinker_id); | |
e805605c | 1317 | #else |
80e95fe0 | 1318 | #define mem_cgroup_sockets_enabled 0 |
2d758073 JW |
1319 | static inline void mem_cgroup_sk_alloc(struct sock *sk) { }; |
1320 | static inline void mem_cgroup_sk_free(struct sock *sk) { }; | |
baac50bb | 1321 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c JW |
1322 | { |
1323 | return false; | |
1324 | } | |
0a432dcb YS |
1325 | |
1326 | static inline void memcg_set_shrinker_bit(struct mem_cgroup *memcg, | |
1327 | int nid, int shrinker_id) | |
1328 | { | |
1329 | } | |
e805605c | 1330 | #endif |
7ae1e1d0 | 1331 | |
45264778 VD |
1332 | struct kmem_cache *memcg_kmem_get_cache(struct kmem_cache *cachep); |
1333 | void memcg_kmem_put_cache(struct kmem_cache *cachep); | |
9b6f7e16 RG |
1334 | |
1335 | #ifdef CONFIG_MEMCG_KMEM | |
4b13f64d RG |
1336 | int __memcg_kmem_charge(struct mem_cgroup *memcg, gfp_t gfp, |
1337 | unsigned int nr_pages); | |
1338 | void __memcg_kmem_uncharge(struct mem_cgroup *memcg, unsigned int nr_pages); | |
f4b00eab RG |
1339 | int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, int order); |
1340 | void __memcg_kmem_uncharge_page(struct page *page, int order); | |
45264778 | 1341 | |
ef12947c | 1342 | extern struct static_key_false memcg_kmem_enabled_key; |
17cc4dfe | 1343 | extern struct workqueue_struct *memcg_kmem_cache_wq; |
749c5415 | 1344 | |
dbcf73e2 | 1345 | extern int memcg_nr_cache_ids; |
64219994 MH |
1346 | void memcg_get_cache_ids(void); |
1347 | void memcg_put_cache_ids(void); | |
ebe945c2 GC |
1348 | |
1349 | /* | |
1350 | * Helper macro to loop through all memcg-specific caches. Callers must still | |
1351 | * check if the cache is valid (it is either valid or NULL). | |
1352 | * the slab_mutex must be held when looping through those caches | |
1353 | */ | |
749c5415 | 1354 | #define for_each_memcg_cache_index(_idx) \ |
dbcf73e2 | 1355 | for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++) |
749c5415 | 1356 | |
7ae1e1d0 GC |
1357 | static inline bool memcg_kmem_enabled(void) |
1358 | { | |
ef12947c | 1359 | return static_branch_unlikely(&memcg_kmem_enabled_key); |
7ae1e1d0 GC |
1360 | } |
1361 | ||
f4b00eab RG |
1362 | static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1363 | int order) | |
60cd4bcd SB |
1364 | { |
1365 | if (memcg_kmem_enabled()) | |
f4b00eab | 1366 | return __memcg_kmem_charge_page(page, gfp, order); |
60cd4bcd SB |
1367 | return 0; |
1368 | } | |
1369 | ||
f4b00eab | 1370 | static inline void memcg_kmem_uncharge_page(struct page *page, int order) |
60cd4bcd SB |
1371 | { |
1372 | if (memcg_kmem_enabled()) | |
f4b00eab | 1373 | __memcg_kmem_uncharge_page(page, order); |
60cd4bcd SB |
1374 | } |
1375 | ||
4b13f64d RG |
1376 | static inline int memcg_kmem_charge(struct mem_cgroup *memcg, gfp_t gfp, |
1377 | unsigned int nr_pages) | |
60cd4bcd SB |
1378 | { |
1379 | if (memcg_kmem_enabled()) | |
4b13f64d | 1380 | return __memcg_kmem_charge(memcg, gfp, nr_pages); |
60cd4bcd SB |
1381 | return 0; |
1382 | } | |
49a18eae | 1383 | |
4b13f64d RG |
1384 | static inline void memcg_kmem_uncharge(struct mem_cgroup *memcg, |
1385 | unsigned int nr_pages) | |
49a18eae RG |
1386 | { |
1387 | if (memcg_kmem_enabled()) | |
4b13f64d | 1388 | __memcg_kmem_uncharge(memcg, nr_pages); |
49a18eae RG |
1389 | } |
1390 | ||
33398cf2 | 1391 | /* |
9f706d68 | 1392 | * helper for accessing a memcg's index. It will be used as an index in the |
33398cf2 MH |
1393 | * child cache array in kmem_cache, and also to derive its name. This function |
1394 | * will return -1 when this is not a kmem-limited memcg. | |
1395 | */ | |
1396 | static inline int memcg_cache_id(struct mem_cgroup *memcg) | |
1397 | { | |
1398 | return memcg ? memcg->kmemcg_id : -1; | |
1399 | } | |
5722d094 | 1400 | |
8380ce47 RG |
1401 | struct mem_cgroup *mem_cgroup_from_obj(void *p); |
1402 | ||
7ae1e1d0 | 1403 | #else |
9b6f7e16 | 1404 | |
f4b00eab RG |
1405 | static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1406 | int order) | |
9b6f7e16 RG |
1407 | { |
1408 | return 0; | |
1409 | } | |
1410 | ||
f4b00eab | 1411 | static inline void memcg_kmem_uncharge_page(struct page *page, int order) |
9b6f7e16 RG |
1412 | { |
1413 | } | |
1414 | ||
f4b00eab RG |
1415 | static inline int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1416 | int order) | |
60cd4bcd SB |
1417 | { |
1418 | return 0; | |
1419 | } | |
1420 | ||
f4b00eab | 1421 | static inline void __memcg_kmem_uncharge_page(struct page *page, int order) |
60cd4bcd SB |
1422 | { |
1423 | } | |
1424 | ||
749c5415 GC |
1425 | #define for_each_memcg_cache_index(_idx) \ |
1426 | for (; NULL; ) | |
1427 | ||
b9ce5ef4 GC |
1428 | static inline bool memcg_kmem_enabled(void) |
1429 | { | |
1430 | return false; | |
1431 | } | |
1432 | ||
2633d7a0 GC |
1433 | static inline int memcg_cache_id(struct mem_cgroup *memcg) |
1434 | { | |
1435 | return -1; | |
1436 | } | |
1437 | ||
05257a1a VD |
1438 | static inline void memcg_get_cache_ids(void) |
1439 | { | |
1440 | } | |
1441 | ||
1442 | static inline void memcg_put_cache_ids(void) | |
1443 | { | |
1444 | } | |
1445 | ||
8380ce47 RG |
1446 | static inline struct mem_cgroup *mem_cgroup_from_obj(void *p) |
1447 | { | |
1448 | return NULL; | |
1449 | } | |
1450 | ||
84c07d11 | 1451 | #endif /* CONFIG_MEMCG_KMEM */ |
127424c8 | 1452 | |
8cdea7c0 | 1453 | #endif /* _LINUX_MEMCONTROL_H */ |