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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 | |
d9eb1ea2 | 358 | int mem_cgroup_charge(struct page *page, struct mm_struct *mm, gfp_t gfp_mask); |
3fea5a49 | 359 | |
0a31bc97 | 360 | void mem_cgroup_uncharge(struct page *page); |
747db954 | 361 | void mem_cgroup_uncharge_list(struct list_head *page_list); |
569b846d | 362 | |
6a93ca8f | 363 | void mem_cgroup_migrate(struct page *oldpage, struct page *newpage); |
569b846d | 364 | |
ef8f2327 MG |
365 | static struct mem_cgroup_per_node * |
366 | mem_cgroup_nodeinfo(struct mem_cgroup *memcg, int nid) | |
55779ec7 | 367 | { |
ef8f2327 | 368 | return memcg->nodeinfo[nid]; |
55779ec7 JW |
369 | } |
370 | ||
371 | /** | |
867e5e1d | 372 | * mem_cgroup_lruvec - get the lru list vector for a memcg & node |
55779ec7 JW |
373 | * @memcg: memcg of the wanted lruvec |
374 | * | |
867e5e1d JW |
375 | * Returns the lru list vector holding pages for a given @memcg & |
376 | * @node combination. This can be the node lruvec, if the memory | |
377 | * controller is disabled. | |
55779ec7 | 378 | */ |
867e5e1d JW |
379 | static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg, |
380 | struct pglist_data *pgdat) | |
55779ec7 | 381 | { |
ef8f2327 | 382 | struct mem_cgroup_per_node *mz; |
55779ec7 JW |
383 | struct lruvec *lruvec; |
384 | ||
385 | if (mem_cgroup_disabled()) { | |
867e5e1d | 386 | lruvec = &pgdat->__lruvec; |
55779ec7 JW |
387 | goto out; |
388 | } | |
389 | ||
1b05117d JW |
390 | if (!memcg) |
391 | memcg = root_mem_cgroup; | |
392 | ||
ef8f2327 | 393 | mz = mem_cgroup_nodeinfo(memcg, pgdat->node_id); |
55779ec7 JW |
394 | lruvec = &mz->lruvec; |
395 | out: | |
396 | /* | |
397 | * Since a node can be onlined after the mem_cgroup was created, | |
599d0c95 | 398 | * we have to be prepared to initialize lruvec->pgdat here; |
55779ec7 JW |
399 | * and if offlined then reonlined, we need to reinitialize it. |
400 | */ | |
ef8f2327 MG |
401 | if (unlikely(lruvec->pgdat != pgdat)) |
402 | lruvec->pgdat = pgdat; | |
55779ec7 JW |
403 | return lruvec; |
404 | } | |
405 | ||
599d0c95 | 406 | struct lruvec *mem_cgroup_page_lruvec(struct page *, struct pglist_data *); |
c9b0ed51 | 407 | |
64219994 | 408 | struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
e993d905 | 409 | |
d46eb14b SB |
410 | struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm); |
411 | ||
f745c6f5 SB |
412 | struct mem_cgroup *get_mem_cgroup_from_page(struct page *page); |
413 | ||
33398cf2 MH |
414 | static inline |
415 | struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){ | |
416 | return css ? container_of(css, struct mem_cgroup, css) : NULL; | |
417 | } | |
418 | ||
dc0b5864 RG |
419 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
420 | { | |
d46eb14b SB |
421 | if (memcg) |
422 | css_put(&memcg->css); | |
dc0b5864 RG |
423 | } |
424 | ||
8e8ae645 JW |
425 | #define mem_cgroup_from_counter(counter, member) \ |
426 | container_of(counter, struct mem_cgroup, member) | |
427 | ||
33398cf2 MH |
428 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
429 | struct mem_cgroup *, | |
430 | struct mem_cgroup_reclaim_cookie *); | |
431 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); | |
7c5f64f8 VD |
432 | int mem_cgroup_scan_tasks(struct mem_cgroup *, |
433 | int (*)(struct task_struct *, void *), void *); | |
33398cf2 | 434 | |
23047a96 JW |
435 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
436 | { | |
437 | if (mem_cgroup_disabled()) | |
438 | return 0; | |
439 | ||
73f576c0 | 440 | return memcg->id.id; |
23047a96 | 441 | } |
73f576c0 | 442 | struct mem_cgroup *mem_cgroup_from_id(unsigned short id); |
23047a96 | 443 | |
aa9694bb CD |
444 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
445 | { | |
446 | return mem_cgroup_from_css(seq_css(m)); | |
447 | } | |
448 | ||
2262185c RG |
449 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
450 | { | |
451 | struct mem_cgroup_per_node *mz; | |
452 | ||
453 | if (mem_cgroup_disabled()) | |
454 | return NULL; | |
455 | ||
456 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
457 | return mz->memcg; | |
458 | } | |
459 | ||
8e8ae645 JW |
460 | /** |
461 | * parent_mem_cgroup - find the accounting parent of a memcg | |
462 | * @memcg: memcg whose parent to find | |
463 | * | |
464 | * Returns the parent memcg, or NULL if this is the root or the memory | |
465 | * controller is in legacy no-hierarchy mode. | |
466 | */ | |
467 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) | |
468 | { | |
469 | if (!memcg->memory.parent) | |
470 | return NULL; | |
471 | return mem_cgroup_from_counter(memcg->memory.parent, memory); | |
472 | } | |
473 | ||
33398cf2 MH |
474 | static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, |
475 | struct mem_cgroup *root) | |
476 | { | |
477 | if (root == memcg) | |
478 | return true; | |
479 | if (!root->use_hierarchy) | |
480 | return false; | |
481 | return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup); | |
482 | } | |
e1aab161 | 483 | |
2314b42d JW |
484 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
485 | struct mem_cgroup *memcg) | |
2e4d4091 | 486 | { |
587af308 | 487 | struct mem_cgroup *task_memcg; |
413918bb | 488 | bool match = false; |
c3ac9a8a | 489 | |
2e4d4091 | 490 | rcu_read_lock(); |
587af308 | 491 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
413918bb | 492 | if (task_memcg) |
2314b42d | 493 | match = mem_cgroup_is_descendant(task_memcg, memcg); |
2e4d4091 | 494 | rcu_read_unlock(); |
c3ac9a8a | 495 | return match; |
2e4d4091 | 496 | } |
8a9f3ccd | 497 | |
64219994 | 498 | struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page); |
2fc04524 | 499 | ino_t page_cgroup_ino(struct page *page); |
d324236b | 500 | |
eb01aaab VD |
501 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
502 | { | |
503 | if (mem_cgroup_disabled()) | |
504 | return true; | |
505 | return !!(memcg->css.flags & CSS_ONLINE); | |
506 | } | |
507 | ||
58ae83db KH |
508 | /* |
509 | * For memory reclaim. | |
510 | */ | |
889976db | 511 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
33398cf2 MH |
512 | |
513 | void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, | |
b4536f0c | 514 | int zid, int nr_pages); |
33398cf2 | 515 | |
b4536f0c MH |
516 | static inline |
517 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
518 | enum lru_list lru, int zone_idx) | |
519 | { | |
520 | struct mem_cgroup_per_node *mz; | |
521 | ||
522 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
523 | return mz->lru_zone_size[zone_idx][lru]; | |
33398cf2 MH |
524 | } |
525 | ||
b23afb93 TH |
526 | void mem_cgroup_handle_over_high(void); |
527 | ||
bbec2e15 | 528 | unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg); |
7c5f64f8 | 529 | |
9783aa99 CD |
530 | unsigned long mem_cgroup_size(struct mem_cgroup *memcg); |
531 | ||
f0c867d9 | 532 | void mem_cgroup_print_oom_context(struct mem_cgroup *memcg, |
64219994 | 533 | struct task_struct *p); |
58ae83db | 534 | |
f0c867d9 | 535 | void mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg); |
536 | ||
29ef680a | 537 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 | 538 | { |
29ef680a MH |
539 | WARN_ON(current->in_user_fault); |
540 | current->in_user_fault = 1; | |
519e5247 JW |
541 | } |
542 | ||
29ef680a | 543 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 | 544 | { |
29ef680a MH |
545 | WARN_ON(!current->in_user_fault); |
546 | current->in_user_fault = 0; | |
519e5247 JW |
547 | } |
548 | ||
3812c8c8 JW |
549 | static inline bool task_in_memcg_oom(struct task_struct *p) |
550 | { | |
626ebc41 | 551 | return p->memcg_in_oom; |
3812c8c8 JW |
552 | } |
553 | ||
49426420 | 554 | bool mem_cgroup_oom_synchronize(bool wait); |
3d8b38eb RG |
555 | struct mem_cgroup *mem_cgroup_get_oom_group(struct task_struct *victim, |
556 | struct mem_cgroup *oom_domain); | |
557 | void mem_cgroup_print_oom_group(struct mem_cgroup *memcg); | |
3812c8c8 | 558 | |
c255a458 | 559 | #ifdef CONFIG_MEMCG_SWAP |
eccb52e7 | 560 | extern bool cgroup_memory_noswap; |
c077719b | 561 | #endif |
f8d66542 | 562 | |
739f79fc JW |
563 | struct mem_cgroup *lock_page_memcg(struct page *page); |
564 | void __unlock_page_memcg(struct mem_cgroup *memcg); | |
62cccb8c | 565 | void unlock_page_memcg(struct page *page); |
d7365e78 | 566 | |
42a30035 JW |
567 | /* |
568 | * idx can be of type enum memcg_stat_item or node_stat_item. | |
569 | * Keep in sync with memcg_exact_page_state(). | |
570 | */ | |
571 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx) | |
572 | { | |
573 | long x = atomic_long_read(&memcg->vmstats[idx]); | |
574 | #ifdef CONFIG_SMP | |
575 | if (x < 0) | |
576 | x = 0; | |
577 | #endif | |
578 | return x; | |
579 | } | |
580 | ||
0b3d6e6f GT |
581 | /* |
582 | * idx can be of type enum memcg_stat_item or node_stat_item. | |
583 | * Keep in sync with memcg_exact_page_state(). | |
584 | */ | |
205b20cc JW |
585 | static inline unsigned long memcg_page_state_local(struct mem_cgroup *memcg, |
586 | int idx) | |
2a2e4885 | 587 | { |
815744d7 JW |
588 | long x = 0; |
589 | int cpu; | |
590 | ||
591 | for_each_possible_cpu(cpu) | |
592 | x += per_cpu(memcg->vmstats_local->stat[idx], cpu); | |
a983b5eb JW |
593 | #ifdef CONFIG_SMP |
594 | if (x < 0) | |
595 | x = 0; | |
596 | #endif | |
597 | return x; | |
2a2e4885 JW |
598 | } |
599 | ||
db9adbcb | 600 | void __mod_memcg_state(struct mem_cgroup *memcg, int idx, int val); |
2a2e4885 | 601 | |
04fecbf5 | 602 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 603 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 604 | int idx, int val) |
2a2e4885 | 605 | { |
c3cc3911 JW |
606 | unsigned long flags; |
607 | ||
608 | local_irq_save(flags); | |
a983b5eb | 609 | __mod_memcg_state(memcg, idx, val); |
c3cc3911 | 610 | local_irq_restore(flags); |
2a2e4885 JW |
611 | } |
612 | ||
33398cf2 | 613 | /** |
ccda7f43 | 614 | * mod_memcg_page_state - update page state statistics |
62cccb8c | 615 | * @page: the page |
33398cf2 MH |
616 | * @idx: page state item to account |
617 | * @val: number of pages (positive or negative) | |
618 | * | |
fdf1cdb9 JW |
619 | * The @page must be locked or the caller must use lock_page_memcg() |
620 | * to prevent double accounting when the page is concurrently being | |
621 | * moved to another memcg: | |
81f8c3a4 | 622 | * |
fdf1cdb9 | 623 | * lock_page(page) or lock_page_memcg(page) |
81f8c3a4 | 624 | * if (TestClearPageState(page)) |
ccda7f43 | 625 | * mod_memcg_page_state(page, state, -1); |
fdf1cdb9 | 626 | * unlock_page(page) or unlock_page_memcg(page) |
2a2e4885 JW |
627 | * |
628 | * Kernel pages are an exception to this, since they'll never move. | |
33398cf2 | 629 | */ |
00f3ca2c | 630 | static inline void __mod_memcg_page_state(struct page *page, |
04fecbf5 | 631 | int idx, int val) |
00f3ca2c JW |
632 | { |
633 | if (page->mem_cgroup) | |
634 | __mod_memcg_state(page->mem_cgroup, idx, val); | |
635 | } | |
636 | ||
ccda7f43 | 637 | static inline void mod_memcg_page_state(struct page *page, |
04fecbf5 | 638 | int idx, int val) |
33398cf2 | 639 | { |
62cccb8c | 640 | if (page->mem_cgroup) |
ccda7f43 | 641 | mod_memcg_state(page->mem_cgroup, idx, val); |
33398cf2 MH |
642 | } |
643 | ||
42a30035 JW |
644 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
645 | enum node_stat_item idx) | |
646 | { | |
647 | struct mem_cgroup_per_node *pn; | |
648 | long x; | |
649 | ||
650 | if (mem_cgroup_disabled()) | |
651 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
652 | ||
653 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
654 | x = atomic_long_read(&pn->lruvec_stat[idx]); | |
655 | #ifdef CONFIG_SMP | |
656 | if (x < 0) | |
657 | x = 0; | |
658 | #endif | |
659 | return x; | |
660 | } | |
661 | ||
205b20cc JW |
662 | static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
663 | enum node_stat_item idx) | |
2a7106f2 | 664 | { |
00f3ca2c | 665 | struct mem_cgroup_per_node *pn; |
815744d7 JW |
666 | long x = 0; |
667 | int cpu; | |
00f3ca2c JW |
668 | |
669 | if (mem_cgroup_disabled()) | |
670 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
671 | ||
672 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
815744d7 JW |
673 | for_each_possible_cpu(cpu) |
674 | x += per_cpu(pn->lruvec_stat_local->count[idx], cpu); | |
a983b5eb JW |
675 | #ifdef CONFIG_SMP |
676 | if (x < 0) | |
677 | x = 0; | |
678 | #endif | |
679 | return x; | |
2a7106f2 GT |
680 | } |
681 | ||
db9adbcb JW |
682 | void __mod_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx, |
683 | int val); | |
ec9f0238 | 684 | void __mod_lruvec_slab_state(void *p, enum node_stat_item idx, int val); |
8380ce47 | 685 | void mod_memcg_obj_state(void *p, int idx, int val); |
00f3ca2c JW |
686 | |
687 | static inline void mod_lruvec_state(struct lruvec *lruvec, | |
688 | enum node_stat_item idx, int val) | |
689 | { | |
c3cc3911 JW |
690 | unsigned long flags; |
691 | ||
692 | local_irq_save(flags); | |
28454265 | 693 | __mod_lruvec_state(lruvec, idx, val); |
c3cc3911 | 694 | local_irq_restore(flags); |
00f3ca2c JW |
695 | } |
696 | ||
697 | static inline void __mod_lruvec_page_state(struct page *page, | |
698 | enum node_stat_item idx, int val) | |
699 | { | |
9da7b521 | 700 | struct page *head = compound_head(page); /* rmap on tail pages */ |
28454265 JW |
701 | pg_data_t *pgdat = page_pgdat(page); |
702 | struct lruvec *lruvec; | |
00f3ca2c | 703 | |
28454265 | 704 | /* Untracked pages have no memcg, no lruvec. Update only the node */ |
9da7b521 | 705 | if (!head->mem_cgroup) { |
28454265 | 706 | __mod_node_page_state(pgdat, idx, val); |
00f3ca2c | 707 | return; |
28454265 JW |
708 | } |
709 | ||
9da7b521 | 710 | lruvec = mem_cgroup_lruvec(head->mem_cgroup, pgdat); |
28454265 | 711 | __mod_lruvec_state(lruvec, idx, val); |
00f3ca2c JW |
712 | } |
713 | ||
714 | static inline void mod_lruvec_page_state(struct page *page, | |
715 | enum node_stat_item idx, int val) | |
716 | { | |
c3cc3911 JW |
717 | unsigned long flags; |
718 | ||
719 | local_irq_save(flags); | |
28454265 | 720 | __mod_lruvec_page_state(page, idx, val); |
c3cc3911 | 721 | local_irq_restore(flags); |
2a7106f2 GT |
722 | } |
723 | ||
ef8f2327 | 724 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
725 | gfp_t gfp_mask, |
726 | unsigned long *total_scanned); | |
a63d83f4 | 727 | |
db9adbcb JW |
728 | void __count_memcg_events(struct mem_cgroup *memcg, enum vm_event_item idx, |
729 | unsigned long count); | |
c9019e9b | 730 | |
2262185c | 731 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
e27be240 JW |
732 | enum vm_event_item idx, |
733 | unsigned long count) | |
2262185c | 734 | { |
c3cc3911 JW |
735 | unsigned long flags; |
736 | ||
737 | local_irq_save(flags); | |
a983b5eb | 738 | __count_memcg_events(memcg, idx, count); |
c3cc3911 | 739 | local_irq_restore(flags); |
2262185c RG |
740 | } |
741 | ||
742 | static inline void count_memcg_page_event(struct page *page, | |
e27be240 | 743 | enum vm_event_item idx) |
2262185c RG |
744 | { |
745 | if (page->mem_cgroup) | |
746 | count_memcg_events(page->mem_cgroup, idx, 1); | |
747 | } | |
748 | ||
749 | static inline void count_memcg_event_mm(struct mm_struct *mm, | |
750 | enum vm_event_item idx) | |
68ae564b | 751 | { |
33398cf2 MH |
752 | struct mem_cgroup *memcg; |
753 | ||
68ae564b DR |
754 | if (mem_cgroup_disabled()) |
755 | return; | |
33398cf2 MH |
756 | |
757 | rcu_read_lock(); | |
758 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
fe6bdfc8 | 759 | if (likely(memcg)) |
c9019e9b | 760 | count_memcg_events(memcg, idx, 1); |
33398cf2 | 761 | rcu_read_unlock(); |
68ae564b | 762 | } |
c9019e9b | 763 | |
e27be240 JW |
764 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
765 | enum memcg_memory_event event) | |
c9019e9b | 766 | { |
1e577f97 SB |
767 | atomic_long_inc(&memcg->memory_events_local[event]); |
768 | cgroup_file_notify(&memcg->events_local_file); | |
769 | ||
9852ae3f CD |
770 | do { |
771 | atomic_long_inc(&memcg->memory_events[event]); | |
772 | cgroup_file_notify(&memcg->events_file); | |
773 | ||
04fd61a4 YS |
774 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys)) |
775 | break; | |
9852ae3f CD |
776 | if (cgrp_dfl_root.flags & CGRP_ROOT_MEMORY_LOCAL_EVENTS) |
777 | break; | |
778 | } while ((memcg = parent_mem_cgroup(memcg)) && | |
779 | !mem_cgroup_is_root(memcg)); | |
c9019e9b JW |
780 | } |
781 | ||
fe6bdfc8 RG |
782 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
783 | enum memcg_memory_event event) | |
784 | { | |
785 | struct mem_cgroup *memcg; | |
786 | ||
787 | if (mem_cgroup_disabled()) | |
788 | return; | |
789 | ||
790 | rcu_read_lock(); | |
791 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
792 | if (likely(memcg)) | |
793 | memcg_memory_event(memcg, event); | |
794 | rcu_read_unlock(); | |
795 | } | |
796 | ||
ca3e0214 | 797 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
e94c8a9c | 798 | void mem_cgroup_split_huge_fixup(struct page *head); |
ca3e0214 KH |
799 | #endif |
800 | ||
c255a458 | 801 | #else /* CONFIG_MEMCG */ |
23047a96 JW |
802 | |
803 | #define MEM_CGROUP_ID_SHIFT 0 | |
804 | #define MEM_CGROUP_ID_MAX 0 | |
805 | ||
7a81b88c KH |
806 | struct mem_cgroup; |
807 | ||
dfd2f10c KT |
808 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
809 | { | |
810 | return true; | |
811 | } | |
812 | ||
23047a96 JW |
813 | static inline bool mem_cgroup_disabled(void) |
814 | { | |
815 | return true; | |
816 | } | |
817 | ||
e27be240 JW |
818 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
819 | enum memcg_memory_event event) | |
241994ed JW |
820 | { |
821 | } | |
822 | ||
fe6bdfc8 RG |
823 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
824 | enum memcg_memory_event event) | |
825 | { | |
826 | } | |
827 | ||
1bc63fb1 CD |
828 | static inline unsigned long mem_cgroup_protection(struct mem_cgroup *memcg, |
829 | bool in_low_reclaim) | |
9783aa99 | 830 | { |
1bc63fb1 | 831 | return 0; |
9783aa99 CD |
832 | } |
833 | ||
bf8d5d52 RG |
834 | static inline enum mem_cgroup_protection mem_cgroup_protected( |
835 | struct mem_cgroup *root, struct mem_cgroup *memcg) | |
241994ed | 836 | { |
bf8d5d52 | 837 | return MEMCG_PROT_NONE; |
241994ed JW |
838 | } |
839 | ||
3fea5a49 | 840 | static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm, |
d9eb1ea2 | 841 | gfp_t gfp_mask) |
3fea5a49 JW |
842 | { |
843 | return 0; | |
844 | } | |
845 | ||
0a31bc97 | 846 | static inline void mem_cgroup_uncharge(struct page *page) |
569b846d KH |
847 | { |
848 | } | |
849 | ||
747db954 | 850 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
8a9f3ccd BS |
851 | { |
852 | } | |
853 | ||
6a93ca8f | 854 | static inline void mem_cgroup_migrate(struct page *old, struct page *new) |
69029cd5 KH |
855 | { |
856 | } | |
857 | ||
867e5e1d JW |
858 | static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg, |
859 | struct pglist_data *pgdat) | |
08e552c6 | 860 | { |
867e5e1d | 861 | return &pgdat->__lruvec; |
08e552c6 KH |
862 | } |
863 | ||
fa9add64 | 864 | static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, |
599d0c95 | 865 | struct pglist_data *pgdat) |
66e1707b | 866 | { |
867e5e1d | 867 | return &pgdat->__lruvec; |
66e1707b BS |
868 | } |
869 | ||
b910718a JW |
870 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) |
871 | { | |
872 | return NULL; | |
873 | } | |
874 | ||
587af308 | 875 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
c0ff4b85 | 876 | struct mem_cgroup *memcg) |
bed7161a | 877 | { |
587af308 | 878 | return true; |
bed7161a BS |
879 | } |
880 | ||
d46eb14b SB |
881 | static inline struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm) |
882 | { | |
883 | return NULL; | |
884 | } | |
885 | ||
f745c6f5 SB |
886 | static inline struct mem_cgroup *get_mem_cgroup_from_page(struct page *page) |
887 | { | |
888 | return NULL; | |
889 | } | |
890 | ||
dc0b5864 RG |
891 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
892 | { | |
893 | } | |
894 | ||
5660048c JW |
895 | static inline struct mem_cgroup * |
896 | mem_cgroup_iter(struct mem_cgroup *root, | |
897 | struct mem_cgroup *prev, | |
898 | struct mem_cgroup_reclaim_cookie *reclaim) | |
899 | { | |
900 | return NULL; | |
901 | } | |
902 | ||
903 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
904 | struct mem_cgroup *prev) | |
905 | { | |
906 | } | |
907 | ||
7c5f64f8 VD |
908 | static inline int mem_cgroup_scan_tasks(struct mem_cgroup *memcg, |
909 | int (*fn)(struct task_struct *, void *), void *arg) | |
910 | { | |
911 | return 0; | |
912 | } | |
913 | ||
23047a96 | 914 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
f8d66542 | 915 | { |
23047a96 JW |
916 | return 0; |
917 | } | |
918 | ||
919 | static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id) | |
920 | { | |
921 | WARN_ON_ONCE(id); | |
922 | /* XXX: This should always return root_mem_cgroup */ | |
923 | return NULL; | |
f8d66542 | 924 | } |
a636b327 | 925 | |
aa9694bb CD |
926 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
927 | { | |
928 | return NULL; | |
929 | } | |
930 | ||
2262185c RG |
931 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
932 | { | |
933 | return NULL; | |
934 | } | |
935 | ||
eb01aaab | 936 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
14797e23 | 937 | { |
13308ca9 | 938 | return true; |
14797e23 KM |
939 | } |
940 | ||
b4536f0c MH |
941 | static inline |
942 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
943 | enum lru_list lru, int zone_idx) | |
944 | { | |
945 | return 0; | |
946 | } | |
a3d8e054 | 947 | |
bbec2e15 | 948 | static inline unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg) |
7c5f64f8 VD |
949 | { |
950 | return 0; | |
951 | } | |
952 | ||
9783aa99 CD |
953 | static inline unsigned long mem_cgroup_size(struct mem_cgroup *memcg) |
954 | { | |
955 | return 0; | |
956 | } | |
957 | ||
e222432b | 958 | static inline void |
f0c867d9 | 959 | mem_cgroup_print_oom_context(struct mem_cgroup *memcg, struct task_struct *p) |
960 | { | |
961 | } | |
962 | ||
963 | static inline void | |
964 | mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg) | |
e222432b BS |
965 | { |
966 | } | |
967 | ||
739f79fc JW |
968 | static inline struct mem_cgroup *lock_page_memcg(struct page *page) |
969 | { | |
970 | return NULL; | |
971 | } | |
972 | ||
973 | static inline void __unlock_page_memcg(struct mem_cgroup *memcg) | |
89c06bd5 KH |
974 | { |
975 | } | |
976 | ||
62cccb8c | 977 | static inline void unlock_page_memcg(struct page *page) |
89c06bd5 KH |
978 | { |
979 | } | |
980 | ||
b23afb93 TH |
981 | static inline void mem_cgroup_handle_over_high(void) |
982 | { | |
983 | } | |
984 | ||
29ef680a | 985 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 JW |
986 | { |
987 | } | |
988 | ||
29ef680a | 989 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 JW |
990 | { |
991 | } | |
992 | ||
3812c8c8 JW |
993 | static inline bool task_in_memcg_oom(struct task_struct *p) |
994 | { | |
995 | return false; | |
996 | } | |
997 | ||
49426420 | 998 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
3812c8c8 JW |
999 | { |
1000 | return false; | |
1001 | } | |
1002 | ||
3d8b38eb RG |
1003 | static inline struct mem_cgroup *mem_cgroup_get_oom_group( |
1004 | struct task_struct *victim, struct mem_cgroup *oom_domain) | |
1005 | { | |
1006 | return NULL; | |
1007 | } | |
1008 | ||
1009 | static inline void mem_cgroup_print_oom_group(struct mem_cgroup *memcg) | |
1010 | { | |
1011 | } | |
1012 | ||
42a30035 JW |
1013 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx) |
1014 | { | |
1015 | return 0; | |
1016 | } | |
1017 | ||
205b20cc JW |
1018 | static inline unsigned long memcg_page_state_local(struct mem_cgroup *memcg, |
1019 | int idx) | |
2a2e4885 JW |
1020 | { |
1021 | return 0; | |
1022 | } | |
1023 | ||
00f3ca2c | 1024 | static inline void __mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1025 | int idx, |
00f3ca2c | 1026 | int nr) |
2a2e4885 JW |
1027 | { |
1028 | } | |
1029 | ||
00f3ca2c | 1030 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1031 | int idx, |
00f3ca2c | 1032 | int nr) |
2a2e4885 JW |
1033 | { |
1034 | } | |
1035 | ||
00f3ca2c | 1036 | static inline void __mod_memcg_page_state(struct page *page, |
04fecbf5 | 1037 | int idx, |
00f3ca2c | 1038 | int nr) |
2a2e4885 JW |
1039 | { |
1040 | } | |
1041 | ||
ccda7f43 | 1042 | static inline void mod_memcg_page_state(struct page *page, |
04fecbf5 | 1043 | int idx, |
ccda7f43 | 1044 | int nr) |
553af430 JW |
1045 | { |
1046 | } | |
1047 | ||
42a30035 JW |
1048 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
1049 | enum node_stat_item idx) | |
1050 | { | |
1051 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
1052 | } | |
1053 | ||
205b20cc JW |
1054 | static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
1055 | enum node_stat_item idx) | |
2a7106f2 | 1056 | { |
00f3ca2c | 1057 | return node_page_state(lruvec_pgdat(lruvec), idx); |
2a7106f2 GT |
1058 | } |
1059 | ||
00f3ca2c JW |
1060 | static inline void __mod_lruvec_state(struct lruvec *lruvec, |
1061 | enum node_stat_item idx, int val) | |
d69b042f | 1062 | { |
00f3ca2c JW |
1063 | __mod_node_page_state(lruvec_pgdat(lruvec), idx, val); |
1064 | } | |
1065 | ||
1066 | static inline void mod_lruvec_state(struct lruvec *lruvec, | |
1067 | enum node_stat_item idx, int val) | |
1068 | { | |
1069 | mod_node_page_state(lruvec_pgdat(lruvec), idx, val); | |
1070 | } | |
1071 | ||
1072 | static inline void __mod_lruvec_page_state(struct page *page, | |
1073 | enum node_stat_item idx, int val) | |
1074 | { | |
1075 | __mod_node_page_state(page_pgdat(page), idx, val); | |
1076 | } | |
1077 | ||
1078 | static inline void mod_lruvec_page_state(struct page *page, | |
1079 | enum node_stat_item idx, int val) | |
1080 | { | |
1081 | mod_node_page_state(page_pgdat(page), idx, val); | |
d69b042f BS |
1082 | } |
1083 | ||
ec9f0238 RG |
1084 | static inline void __mod_lruvec_slab_state(void *p, enum node_stat_item idx, |
1085 | int val) | |
1086 | { | |
1087 | struct page *page = virt_to_head_page(p); | |
1088 | ||
1089 | __mod_node_page_state(page_pgdat(page), idx, val); | |
1090 | } | |
1091 | ||
8380ce47 RG |
1092 | static inline void mod_memcg_obj_state(void *p, int idx, int val) |
1093 | { | |
1094 | } | |
1095 | ||
4e416953 | 1096 | static inline |
ef8f2327 | 1097 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
1098 | gfp_t gfp_mask, |
1099 | unsigned long *total_scanned) | |
4e416953 | 1100 | { |
0608f43d | 1101 | return 0; |
4e416953 BS |
1102 | } |
1103 | ||
e94c8a9c | 1104 | static inline void mem_cgroup_split_huge_fixup(struct page *head) |
ca3e0214 KH |
1105 | { |
1106 | } | |
1107 | ||
2262185c RG |
1108 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
1109 | enum vm_event_item idx, | |
1110 | unsigned long count) | |
1111 | { | |
1112 | } | |
1113 | ||
9851ac13 KT |
1114 | static inline void __count_memcg_events(struct mem_cgroup *memcg, |
1115 | enum vm_event_item idx, | |
1116 | unsigned long count) | |
1117 | { | |
1118 | } | |
1119 | ||
2262185c | 1120 | static inline void count_memcg_page_event(struct page *page, |
04fecbf5 | 1121 | int idx) |
2262185c RG |
1122 | { |
1123 | } | |
1124 | ||
456f998e | 1125 | static inline |
2262185c | 1126 | void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx) |
456f998e YH |
1127 | { |
1128 | } | |
c255a458 | 1129 | #endif /* CONFIG_MEMCG */ |
78fb7466 | 1130 | |
04fecbf5 | 1131 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1132 | static inline void __inc_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1133 | int idx) |
00f3ca2c JW |
1134 | { |
1135 | __mod_memcg_state(memcg, idx, 1); | |
1136 | } | |
1137 | ||
04fecbf5 | 1138 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1139 | static inline void __dec_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1140 | int idx) |
00f3ca2c JW |
1141 | { |
1142 | __mod_memcg_state(memcg, idx, -1); | |
1143 | } | |
1144 | ||
04fecbf5 | 1145 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1146 | static inline void __inc_memcg_page_state(struct page *page, |
04fecbf5 | 1147 | int idx) |
00f3ca2c JW |
1148 | { |
1149 | __mod_memcg_page_state(page, idx, 1); | |
1150 | } | |
1151 | ||
04fecbf5 | 1152 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1153 | static inline void __dec_memcg_page_state(struct page *page, |
04fecbf5 | 1154 | int idx) |
00f3ca2c JW |
1155 | { |
1156 | __mod_memcg_page_state(page, idx, -1); | |
1157 | } | |
1158 | ||
1159 | static inline void __inc_lruvec_state(struct lruvec *lruvec, | |
1160 | enum node_stat_item idx) | |
1161 | { | |
1162 | __mod_lruvec_state(lruvec, idx, 1); | |
1163 | } | |
1164 | ||
1165 | static inline void __dec_lruvec_state(struct lruvec *lruvec, | |
1166 | enum node_stat_item idx) | |
1167 | { | |
1168 | __mod_lruvec_state(lruvec, idx, -1); | |
1169 | } | |
1170 | ||
1171 | static inline void __inc_lruvec_page_state(struct page *page, | |
1172 | enum node_stat_item idx) | |
1173 | { | |
1174 | __mod_lruvec_page_state(page, idx, 1); | |
1175 | } | |
1176 | ||
1177 | static inline void __dec_lruvec_page_state(struct page *page, | |
1178 | enum node_stat_item idx) | |
1179 | { | |
1180 | __mod_lruvec_page_state(page, idx, -1); | |
1181 | } | |
1182 | ||
ec9f0238 RG |
1183 | static inline void __inc_lruvec_slab_state(void *p, enum node_stat_item idx) |
1184 | { | |
1185 | __mod_lruvec_slab_state(p, idx, 1); | |
1186 | } | |
1187 | ||
1188 | static inline void __dec_lruvec_slab_state(void *p, enum node_stat_item idx) | |
1189 | { | |
1190 | __mod_lruvec_slab_state(p, idx, -1); | |
1191 | } | |
1192 | ||
04fecbf5 | 1193 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1194 | static inline void inc_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1195 | int idx) |
00f3ca2c JW |
1196 | { |
1197 | mod_memcg_state(memcg, idx, 1); | |
1198 | } | |
1199 | ||
04fecbf5 | 1200 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1201 | static inline void dec_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1202 | int idx) |
00f3ca2c JW |
1203 | { |
1204 | mod_memcg_state(memcg, idx, -1); | |
1205 | } | |
1206 | ||
04fecbf5 | 1207 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1208 | static inline void inc_memcg_page_state(struct page *page, |
04fecbf5 | 1209 | int idx) |
00f3ca2c JW |
1210 | { |
1211 | mod_memcg_page_state(page, idx, 1); | |
1212 | } | |
1213 | ||
04fecbf5 | 1214 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1215 | static inline void dec_memcg_page_state(struct page *page, |
04fecbf5 | 1216 | int idx) |
00f3ca2c JW |
1217 | { |
1218 | mod_memcg_page_state(page, idx, -1); | |
1219 | } | |
1220 | ||
1221 | static inline void inc_lruvec_state(struct lruvec *lruvec, | |
1222 | enum node_stat_item idx) | |
1223 | { | |
1224 | mod_lruvec_state(lruvec, idx, 1); | |
1225 | } | |
1226 | ||
1227 | static inline void dec_lruvec_state(struct lruvec *lruvec, | |
1228 | enum node_stat_item idx) | |
1229 | { | |
1230 | mod_lruvec_state(lruvec, idx, -1); | |
1231 | } | |
1232 | ||
1233 | static inline void inc_lruvec_page_state(struct page *page, | |
1234 | enum node_stat_item idx) | |
1235 | { | |
1236 | mod_lruvec_page_state(page, idx, 1); | |
1237 | } | |
1238 | ||
1239 | static inline void dec_lruvec_page_state(struct page *page, | |
1240 | enum node_stat_item idx) | |
1241 | { | |
1242 | mod_lruvec_page_state(page, idx, -1); | |
1243 | } | |
1244 | ||
7cf111bc JW |
1245 | static inline struct lruvec *parent_lruvec(struct lruvec *lruvec) |
1246 | { | |
1247 | struct mem_cgroup *memcg; | |
1248 | ||
1249 | memcg = lruvec_memcg(lruvec); | |
1250 | if (!memcg) | |
1251 | return NULL; | |
1252 | memcg = parent_mem_cgroup(memcg); | |
1253 | if (!memcg) | |
1254 | return NULL; | |
1255 | return mem_cgroup_lruvec(memcg, lruvec_pgdat(lruvec)); | |
1256 | } | |
1257 | ||
52ebea74 | 1258 | #ifdef CONFIG_CGROUP_WRITEBACK |
841710aa | 1259 | |
841710aa | 1260 | struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb); |
c5edf9cd TH |
1261 | void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages, |
1262 | unsigned long *pheadroom, unsigned long *pdirty, | |
1263 | unsigned long *pwriteback); | |
841710aa | 1264 | |
97b27821 TH |
1265 | void mem_cgroup_track_foreign_dirty_slowpath(struct page *page, |
1266 | struct bdi_writeback *wb); | |
1267 | ||
1268 | static inline void mem_cgroup_track_foreign_dirty(struct page *page, | |
1269 | struct bdi_writeback *wb) | |
1270 | { | |
08d1d0e6 BH |
1271 | if (mem_cgroup_disabled()) |
1272 | return; | |
1273 | ||
97b27821 TH |
1274 | if (unlikely(&page->mem_cgroup->css != wb->memcg_css)) |
1275 | mem_cgroup_track_foreign_dirty_slowpath(page, wb); | |
1276 | } | |
1277 | ||
1278 | void mem_cgroup_flush_foreign(struct bdi_writeback *wb); | |
1279 | ||
841710aa TH |
1280 | #else /* CONFIG_CGROUP_WRITEBACK */ |
1281 | ||
1282 | static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb) | |
1283 | { | |
1284 | return NULL; | |
1285 | } | |
1286 | ||
c2aa723a | 1287 | static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb, |
c5edf9cd TH |
1288 | unsigned long *pfilepages, |
1289 | unsigned long *pheadroom, | |
c2aa723a TH |
1290 | unsigned long *pdirty, |
1291 | unsigned long *pwriteback) | |
1292 | { | |
1293 | } | |
1294 | ||
97b27821 TH |
1295 | static inline void mem_cgroup_track_foreign_dirty(struct page *page, |
1296 | struct bdi_writeback *wb) | |
1297 | { | |
1298 | } | |
1299 | ||
1300 | static inline void mem_cgroup_flush_foreign(struct bdi_writeback *wb) | |
1301 | { | |
1302 | } | |
1303 | ||
841710aa | 1304 | #endif /* CONFIG_CGROUP_WRITEBACK */ |
52ebea74 | 1305 | |
e1aab161 | 1306 | struct sock; |
baac50bb JW |
1307 | bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); |
1308 | void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); | |
d886f4e4 | 1309 | #ifdef CONFIG_MEMCG |
ef12947c JW |
1310 | extern struct static_key_false memcg_sockets_enabled_key; |
1311 | #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key) | |
2d758073 JW |
1312 | void mem_cgroup_sk_alloc(struct sock *sk); |
1313 | void mem_cgroup_sk_free(struct sock *sk); | |
baac50bb | 1314 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c | 1315 | { |
0db15298 | 1316 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && memcg->tcpmem_pressure) |
8e8ae645 | 1317 | return true; |
8e8ae645 JW |
1318 | do { |
1319 | if (time_before(jiffies, memcg->socket_pressure)) | |
1320 | return true; | |
1321 | } while ((memcg = parent_mem_cgroup(memcg))); | |
1322 | return false; | |
e805605c | 1323 | } |
0a432dcb YS |
1324 | |
1325 | extern int memcg_expand_shrinker_maps(int new_id); | |
1326 | ||
1327 | extern void memcg_set_shrinker_bit(struct mem_cgroup *memcg, | |
1328 | int nid, int shrinker_id); | |
e805605c | 1329 | #else |
80e95fe0 | 1330 | #define mem_cgroup_sockets_enabled 0 |
2d758073 JW |
1331 | static inline void mem_cgroup_sk_alloc(struct sock *sk) { }; |
1332 | static inline void mem_cgroup_sk_free(struct sock *sk) { }; | |
baac50bb | 1333 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c JW |
1334 | { |
1335 | return false; | |
1336 | } | |
0a432dcb YS |
1337 | |
1338 | static inline void memcg_set_shrinker_bit(struct mem_cgroup *memcg, | |
1339 | int nid, int shrinker_id) | |
1340 | { | |
1341 | } | |
e805605c | 1342 | #endif |
7ae1e1d0 | 1343 | |
45264778 VD |
1344 | struct kmem_cache *memcg_kmem_get_cache(struct kmem_cache *cachep); |
1345 | void memcg_kmem_put_cache(struct kmem_cache *cachep); | |
9b6f7e16 RG |
1346 | |
1347 | #ifdef CONFIG_MEMCG_KMEM | |
4b13f64d RG |
1348 | int __memcg_kmem_charge(struct mem_cgroup *memcg, gfp_t gfp, |
1349 | unsigned int nr_pages); | |
1350 | void __memcg_kmem_uncharge(struct mem_cgroup *memcg, unsigned int nr_pages); | |
f4b00eab RG |
1351 | int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, int order); |
1352 | void __memcg_kmem_uncharge_page(struct page *page, int order); | |
45264778 | 1353 | |
ef12947c | 1354 | extern struct static_key_false memcg_kmem_enabled_key; |
17cc4dfe | 1355 | extern struct workqueue_struct *memcg_kmem_cache_wq; |
749c5415 | 1356 | |
dbcf73e2 | 1357 | extern int memcg_nr_cache_ids; |
64219994 MH |
1358 | void memcg_get_cache_ids(void); |
1359 | void memcg_put_cache_ids(void); | |
ebe945c2 GC |
1360 | |
1361 | /* | |
1362 | * Helper macro to loop through all memcg-specific caches. Callers must still | |
1363 | * check if the cache is valid (it is either valid or NULL). | |
1364 | * the slab_mutex must be held when looping through those caches | |
1365 | */ | |
749c5415 | 1366 | #define for_each_memcg_cache_index(_idx) \ |
dbcf73e2 | 1367 | for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++) |
749c5415 | 1368 | |
7ae1e1d0 GC |
1369 | static inline bool memcg_kmem_enabled(void) |
1370 | { | |
ef12947c | 1371 | return static_branch_unlikely(&memcg_kmem_enabled_key); |
7ae1e1d0 GC |
1372 | } |
1373 | ||
f4b00eab RG |
1374 | static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1375 | int order) | |
60cd4bcd SB |
1376 | { |
1377 | if (memcg_kmem_enabled()) | |
f4b00eab | 1378 | return __memcg_kmem_charge_page(page, gfp, order); |
60cd4bcd SB |
1379 | return 0; |
1380 | } | |
1381 | ||
f4b00eab | 1382 | static inline void memcg_kmem_uncharge_page(struct page *page, int order) |
60cd4bcd SB |
1383 | { |
1384 | if (memcg_kmem_enabled()) | |
f4b00eab | 1385 | __memcg_kmem_uncharge_page(page, order); |
60cd4bcd SB |
1386 | } |
1387 | ||
4b13f64d RG |
1388 | static inline int memcg_kmem_charge(struct mem_cgroup *memcg, gfp_t gfp, |
1389 | unsigned int nr_pages) | |
60cd4bcd SB |
1390 | { |
1391 | if (memcg_kmem_enabled()) | |
4b13f64d | 1392 | return __memcg_kmem_charge(memcg, gfp, nr_pages); |
60cd4bcd SB |
1393 | return 0; |
1394 | } | |
49a18eae | 1395 | |
4b13f64d RG |
1396 | static inline void memcg_kmem_uncharge(struct mem_cgroup *memcg, |
1397 | unsigned int nr_pages) | |
49a18eae RG |
1398 | { |
1399 | if (memcg_kmem_enabled()) | |
4b13f64d | 1400 | __memcg_kmem_uncharge(memcg, nr_pages); |
49a18eae RG |
1401 | } |
1402 | ||
33398cf2 | 1403 | /* |
9f706d68 | 1404 | * helper for accessing a memcg's index. It will be used as an index in the |
33398cf2 MH |
1405 | * child cache array in kmem_cache, and also to derive its name. This function |
1406 | * will return -1 when this is not a kmem-limited memcg. | |
1407 | */ | |
1408 | static inline int memcg_cache_id(struct mem_cgroup *memcg) | |
1409 | { | |
1410 | return memcg ? memcg->kmemcg_id : -1; | |
1411 | } | |
5722d094 | 1412 | |
8380ce47 RG |
1413 | struct mem_cgroup *mem_cgroup_from_obj(void *p); |
1414 | ||
7ae1e1d0 | 1415 | #else |
9b6f7e16 | 1416 | |
f4b00eab RG |
1417 | static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1418 | int order) | |
9b6f7e16 RG |
1419 | { |
1420 | return 0; | |
1421 | } | |
1422 | ||
f4b00eab | 1423 | static inline void memcg_kmem_uncharge_page(struct page *page, int order) |
9b6f7e16 RG |
1424 | { |
1425 | } | |
1426 | ||
f4b00eab RG |
1427 | static inline int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1428 | int order) | |
60cd4bcd SB |
1429 | { |
1430 | return 0; | |
1431 | } | |
1432 | ||
f4b00eab | 1433 | static inline void __memcg_kmem_uncharge_page(struct page *page, int order) |
60cd4bcd SB |
1434 | { |
1435 | } | |
1436 | ||
749c5415 GC |
1437 | #define for_each_memcg_cache_index(_idx) \ |
1438 | for (; NULL; ) | |
1439 | ||
b9ce5ef4 GC |
1440 | static inline bool memcg_kmem_enabled(void) |
1441 | { | |
1442 | return false; | |
1443 | } | |
1444 | ||
2633d7a0 GC |
1445 | static inline int memcg_cache_id(struct mem_cgroup *memcg) |
1446 | { | |
1447 | return -1; | |
1448 | } | |
1449 | ||
05257a1a VD |
1450 | static inline void memcg_get_cache_ids(void) |
1451 | { | |
1452 | } | |
1453 | ||
1454 | static inline void memcg_put_cache_ids(void) | |
1455 | { | |
1456 | } | |
1457 | ||
8380ce47 RG |
1458 | static inline struct mem_cgroup *mem_cgroup_from_obj(void *p) |
1459 | { | |
1460 | return NULL; | |
1461 | } | |
1462 | ||
84c07d11 | 1463 | #endif /* CONFIG_MEMCG_KMEM */ |
127424c8 | 1464 | |
8cdea7c0 | 1465 | #endif /* _LINUX_MEMCONTROL_H */ |