Commit | Line | Data |
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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; |
bf4f0599 | 26 | struct obj_cgroup; |
8697d331 BS |
27 | struct page; |
28 | struct mm_struct; | |
2633d7a0 | 29 | struct kmem_cache; |
78fb7466 | 30 | |
71cd3113 JW |
31 | /* Cgroup-specific page state, on top of universal node page state */ |
32 | enum memcg_stat_item { | |
468c3982 | 33 | MEMCG_SWAP = NR_VM_NODE_STAT_ITEMS, |
71cd3113 JW |
34 | MEMCG_SOCK, |
35 | /* XXX: why are these zone and not node counters? */ | |
36 | MEMCG_KERNEL_STACK_KB, | |
b2807f07 | 37 | MEMCG_NR_STAT, |
2a7106f2 GT |
38 | }; |
39 | ||
e27be240 JW |
40 | enum memcg_memory_event { |
41 | MEMCG_LOW, | |
71cd3113 JW |
42 | MEMCG_HIGH, |
43 | MEMCG_MAX, | |
44 | MEMCG_OOM, | |
fe6bdfc8 | 45 | MEMCG_OOM_KILL, |
4b82ab4f | 46 | MEMCG_SWAP_HIGH, |
f3a53a3a TH |
47 | MEMCG_SWAP_MAX, |
48 | MEMCG_SWAP_FAIL, | |
e27be240 | 49 | MEMCG_NR_MEMORY_EVENTS, |
71cd3113 JW |
50 | }; |
51 | ||
bf8d5d52 RG |
52 | enum mem_cgroup_protection { |
53 | MEMCG_PROT_NONE, | |
54 | MEMCG_PROT_LOW, | |
55 | MEMCG_PROT_MIN, | |
56 | }; | |
57 | ||
5660048c | 58 | struct mem_cgroup_reclaim_cookie { |
ef8f2327 | 59 | pg_data_t *pgdat; |
5660048c JW |
60 | unsigned int generation; |
61 | }; | |
62 | ||
71cd3113 JW |
63 | #ifdef CONFIG_MEMCG |
64 | ||
65 | #define MEM_CGROUP_ID_SHIFT 16 | |
66 | #define MEM_CGROUP_ID_MAX USHRT_MAX | |
67 | ||
68 | struct mem_cgroup_id { | |
69 | int id; | |
1c2d479a | 70 | refcount_t ref; |
71cd3113 JW |
71 | }; |
72 | ||
33398cf2 MH |
73 | /* |
74 | * Per memcg event counter is incremented at every pagein/pageout. With THP, | |
75 | * it will be incremated by the number of pages. This counter is used for | |
76 | * for trigger some periodic events. This is straightforward and better | |
77 | * than using jiffies etc. to handle periodic memcg event. | |
78 | */ | |
79 | enum mem_cgroup_events_target { | |
80 | MEM_CGROUP_TARGET_THRESH, | |
81 | MEM_CGROUP_TARGET_SOFTLIMIT, | |
33398cf2 MH |
82 | MEM_CGROUP_NTARGETS, |
83 | }; | |
84 | ||
871789d4 CD |
85 | struct memcg_vmstats_percpu { |
86 | long stat[MEMCG_NR_STAT]; | |
e27be240 | 87 | unsigned long events[NR_VM_EVENT_ITEMS]; |
33398cf2 MH |
88 | unsigned long nr_page_events; |
89 | unsigned long targets[MEM_CGROUP_NTARGETS]; | |
90 | }; | |
91 | ||
92 | struct mem_cgroup_reclaim_iter { | |
93 | struct mem_cgroup *position; | |
94 | /* scan generation, increased every round-trip */ | |
95 | unsigned int generation; | |
96 | }; | |
97 | ||
00f3ca2c JW |
98 | struct lruvec_stat { |
99 | long count[NR_VM_NODE_STAT_ITEMS]; | |
100 | }; | |
101 | ||
0a4465d3 KT |
102 | /* |
103 | * Bitmap of shrinker::id corresponding to memcg-aware shrinkers, | |
104 | * which have elements charged to this memcg. | |
105 | */ | |
106 | struct memcg_shrinker_map { | |
107 | struct rcu_head rcu; | |
307ed94c | 108 | unsigned long map[]; |
0a4465d3 KT |
109 | }; |
110 | ||
33398cf2 | 111 | /* |
242c37b4 | 112 | * per-node information in memory controller. |
33398cf2 | 113 | */ |
ef8f2327 | 114 | struct mem_cgroup_per_node { |
33398cf2 | 115 | struct lruvec lruvec; |
a983b5eb | 116 | |
815744d7 JW |
117 | /* Legacy local VM stats */ |
118 | struct lruvec_stat __percpu *lruvec_stat_local; | |
119 | ||
120 | /* Subtree VM stats (batched updates) */ | |
a983b5eb JW |
121 | struct lruvec_stat __percpu *lruvec_stat_cpu; |
122 | atomic_long_t lruvec_stat[NR_VM_NODE_STAT_ITEMS]; | |
123 | ||
b4536f0c | 124 | unsigned long lru_zone_size[MAX_NR_ZONES][NR_LRU_LISTS]; |
33398cf2 | 125 | |
9da83f3f | 126 | struct mem_cgroup_reclaim_iter iter; |
33398cf2 | 127 | |
0a4465d3 | 128 | struct memcg_shrinker_map __rcu *shrinker_map; |
0a432dcb | 129 | |
33398cf2 MH |
130 | struct rb_node tree_node; /* RB tree node */ |
131 | unsigned long usage_in_excess;/* Set to the value by which */ | |
132 | /* the soft limit is exceeded*/ | |
133 | bool on_tree; | |
134 | struct mem_cgroup *memcg; /* Back pointer, we cannot */ | |
135 | /* use container_of */ | |
136 | }; | |
137 | ||
33398cf2 MH |
138 | struct mem_cgroup_threshold { |
139 | struct eventfd_ctx *eventfd; | |
140 | unsigned long threshold; | |
141 | }; | |
142 | ||
143 | /* For threshold */ | |
144 | struct mem_cgroup_threshold_ary { | |
145 | /* An array index points to threshold just below or equal to usage. */ | |
146 | int current_threshold; | |
147 | /* Size of entries[] */ | |
148 | unsigned int size; | |
149 | /* Array of thresholds */ | |
307ed94c | 150 | struct mem_cgroup_threshold entries[]; |
33398cf2 MH |
151 | }; |
152 | ||
153 | struct mem_cgroup_thresholds { | |
154 | /* Primary thresholds array */ | |
155 | struct mem_cgroup_threshold_ary *primary; | |
156 | /* | |
157 | * Spare threshold array. | |
158 | * This is needed to make mem_cgroup_unregister_event() "never fail". | |
159 | * It must be able to store at least primary->size - 1 entries. | |
160 | */ | |
161 | struct mem_cgroup_threshold_ary *spare; | |
162 | }; | |
163 | ||
567e9ab2 JW |
164 | enum memcg_kmem_state { |
165 | KMEM_NONE, | |
166 | KMEM_ALLOCATED, | |
167 | KMEM_ONLINE, | |
168 | }; | |
169 | ||
e81bf979 AL |
170 | #if defined(CONFIG_SMP) |
171 | struct memcg_padding { | |
172 | char x[0]; | |
173 | } ____cacheline_internodealigned_in_smp; | |
174 | #define MEMCG_PADDING(name) struct memcg_padding name; | |
175 | #else | |
176 | #define MEMCG_PADDING(name) | |
177 | #endif | |
178 | ||
97b27821 TH |
179 | /* |
180 | * Remember four most recent foreign writebacks with dirty pages in this | |
181 | * cgroup. Inode sharing is expected to be uncommon and, even if we miss | |
182 | * one in a given round, we're likely to catch it later if it keeps | |
183 | * foreign-dirtying, so a fairly low count should be enough. | |
184 | * | |
185 | * See mem_cgroup_track_foreign_dirty_slowpath() for details. | |
186 | */ | |
187 | #define MEMCG_CGWB_FRN_CNT 4 | |
188 | ||
189 | struct memcg_cgwb_frn { | |
190 | u64 bdi_id; /* bdi->id of the foreign inode */ | |
191 | int memcg_id; /* memcg->css.id of foreign inode */ | |
192 | u64 at; /* jiffies_64 at the time of dirtying */ | |
193 | struct wb_completion done; /* tracks in-flight foreign writebacks */ | |
194 | }; | |
195 | ||
bf4f0599 RG |
196 | /* |
197 | * Bucket for arbitrarily byte-sized objects charged to a memory | |
198 | * cgroup. The bucket can be reparented in one piece when the cgroup | |
199 | * is destroyed, without having to round up the individual references | |
200 | * of all live memory objects in the wild. | |
201 | */ | |
202 | struct obj_cgroup { | |
203 | struct percpu_ref refcnt; | |
204 | struct mem_cgroup *memcg; | |
205 | atomic_t nr_charged_bytes; | |
206 | union { | |
207 | struct list_head list; | |
208 | struct rcu_head rcu; | |
209 | }; | |
210 | }; | |
211 | ||
33398cf2 MH |
212 | /* |
213 | * The memory controller data structure. The memory controller controls both | |
214 | * page cache and RSS per cgroup. We would eventually like to provide | |
215 | * statistics based on the statistics developed by Rik Van Riel for clock-pro, | |
216 | * to help the administrator determine what knobs to tune. | |
217 | */ | |
218 | struct mem_cgroup { | |
219 | struct cgroup_subsys_state css; | |
220 | ||
73f576c0 JW |
221 | /* Private memcg ID. Used to ID objects that outlive the cgroup */ |
222 | struct mem_cgroup_id id; | |
223 | ||
33398cf2 MH |
224 | /* Accounted resources */ |
225 | struct page_counter memory; | |
37e84351 | 226 | struct page_counter swap; |
0db15298 JW |
227 | |
228 | /* Legacy consumer-oriented counters */ | |
33398cf2 MH |
229 | struct page_counter memsw; |
230 | struct page_counter kmem; | |
0db15298 | 231 | struct page_counter tcpmem; |
33398cf2 | 232 | |
f7e1cb6e JW |
233 | /* Range enforcement for interrupt charges */ |
234 | struct work_struct high_work; | |
235 | ||
33398cf2 MH |
236 | unsigned long soft_limit; |
237 | ||
238 | /* vmpressure notifications */ | |
239 | struct vmpressure vmpressure; | |
240 | ||
33398cf2 MH |
241 | /* |
242 | * Should the accounting and control be hierarchical, per subtree? | |
243 | */ | |
244 | bool use_hierarchy; | |
245 | ||
3d8b38eb RG |
246 | /* |
247 | * Should the OOM killer kill all belonging tasks, had it kill one? | |
248 | */ | |
249 | bool oom_group; | |
250 | ||
33398cf2 MH |
251 | /* protected by memcg_oom_lock */ |
252 | bool oom_lock; | |
253 | int under_oom; | |
254 | ||
255 | int swappiness; | |
256 | /* OOM-Killer disable */ | |
257 | int oom_kill_disable; | |
258 | ||
1e577f97 | 259 | /* memory.events and memory.events.local */ |
472912a2 | 260 | struct cgroup_file events_file; |
1e577f97 | 261 | struct cgroup_file events_local_file; |
472912a2 | 262 | |
f3a53a3a TH |
263 | /* handle for "memory.swap.events" */ |
264 | struct cgroup_file swap_events_file; | |
265 | ||
33398cf2 MH |
266 | /* protect arrays of thresholds */ |
267 | struct mutex thresholds_lock; | |
268 | ||
269 | /* thresholds for memory usage. RCU-protected */ | |
270 | struct mem_cgroup_thresholds thresholds; | |
271 | ||
272 | /* thresholds for mem+swap usage. RCU-protected */ | |
273 | struct mem_cgroup_thresholds memsw_thresholds; | |
274 | ||
275 | /* For oom notifier event fd */ | |
276 | struct list_head oom_notify; | |
277 | ||
278 | /* | |
279 | * Should we move charges of a task when a task is moved into this | |
280 | * mem_cgroup ? And what type of charges should we move ? | |
281 | */ | |
282 | unsigned long move_charge_at_immigrate; | |
e81bf979 AL |
283 | /* taken only while moving_account > 0 */ |
284 | spinlock_t move_lock; | |
285 | unsigned long move_lock_flags; | |
286 | ||
287 | MEMCG_PADDING(_pad1_); | |
288 | ||
33398cf2 MH |
289 | /* |
290 | * set > 0 if pages under this cgroup are moving to other cgroup. | |
291 | */ | |
292 | atomic_t moving_account; | |
33398cf2 | 293 | struct task_struct *move_lock_task; |
a983b5eb | 294 | |
815744d7 JW |
295 | /* Legacy local VM stats and events */ |
296 | struct memcg_vmstats_percpu __percpu *vmstats_local; | |
297 | ||
298 | /* Subtree VM stats and events (batched updates) */ | |
871789d4 | 299 | struct memcg_vmstats_percpu __percpu *vmstats_percpu; |
e81bf979 AL |
300 | |
301 | MEMCG_PADDING(_pad2_); | |
302 | ||
871789d4 CD |
303 | atomic_long_t vmstats[MEMCG_NR_STAT]; |
304 | atomic_long_t vmevents[NR_VM_EVENT_ITEMS]; | |
42a30035 | 305 | |
815744d7 | 306 | /* memory.events */ |
42a30035 | 307 | atomic_long_t memory_events[MEMCG_NR_MEMORY_EVENTS]; |
1e577f97 | 308 | atomic_long_t memory_events_local[MEMCG_NR_MEMORY_EVENTS]; |
33398cf2 | 309 | |
d886f4e4 JW |
310 | unsigned long socket_pressure; |
311 | ||
312 | /* Legacy tcp memory accounting */ | |
0db15298 JW |
313 | bool tcpmem_active; |
314 | int tcpmem_pressure; | |
d886f4e4 | 315 | |
84c07d11 | 316 | #ifdef CONFIG_MEMCG_KMEM |
33398cf2 MH |
317 | /* Index in the kmem_cache->memcg_params.memcg_caches array */ |
318 | int kmemcg_id; | |
567e9ab2 | 319 | enum memcg_kmem_state kmem_state; |
bc2791f8 | 320 | struct list_head kmem_caches; |
bf4f0599 RG |
321 | struct obj_cgroup __rcu *objcg; |
322 | struct list_head objcg_list; /* list of inherited objcgs */ | |
33398cf2 MH |
323 | #endif |
324 | ||
33398cf2 MH |
325 | #ifdef CONFIG_CGROUP_WRITEBACK |
326 | struct list_head cgwb_list; | |
327 | struct wb_domain cgwb_domain; | |
97b27821 | 328 | struct memcg_cgwb_frn cgwb_frn[MEMCG_CGWB_FRN_CNT]; |
33398cf2 MH |
329 | #endif |
330 | ||
331 | /* List of events which userspace want to receive */ | |
332 | struct list_head event_list; | |
333 | spinlock_t event_list_lock; | |
334 | ||
87eaceb3 YS |
335 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
336 | struct deferred_split deferred_split_queue; | |
337 | #endif | |
338 | ||
33398cf2 MH |
339 | struct mem_cgroup_per_node *nodeinfo[0]; |
340 | /* WARNING: nodeinfo must be the last member here */ | |
341 | }; | |
7d828602 | 342 | |
a983b5eb JW |
343 | /* |
344 | * size of first charge trial. "32" comes from vmscan.c's magic value. | |
345 | * TODO: maybe necessary to use big numbers in big irons. | |
346 | */ | |
347 | #define MEMCG_CHARGE_BATCH 32U | |
348 | ||
7d828602 | 349 | extern struct mem_cgroup *root_mem_cgroup; |
56161634 | 350 | |
dfd2f10c KT |
351 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
352 | { | |
353 | return (memcg == root_mem_cgroup); | |
354 | } | |
355 | ||
23047a96 JW |
356 | static inline bool mem_cgroup_disabled(void) |
357 | { | |
358 | return !cgroup_subsys_enabled(memory_cgrp_subsys); | |
359 | } | |
360 | ||
1bc63fb1 CD |
361 | static inline unsigned long mem_cgroup_protection(struct mem_cgroup *memcg, |
362 | bool in_low_reclaim) | |
9783aa99 | 363 | { |
1bc63fb1 CD |
364 | if (mem_cgroup_disabled()) |
365 | return 0; | |
366 | ||
367 | if (in_low_reclaim) | |
368 | return READ_ONCE(memcg->memory.emin); | |
9783aa99 | 369 | |
1bc63fb1 CD |
370 | return max(READ_ONCE(memcg->memory.emin), |
371 | READ_ONCE(memcg->memory.elow)); | |
9783aa99 CD |
372 | } |
373 | ||
bf8d5d52 RG |
374 | enum mem_cgroup_protection mem_cgroup_protected(struct mem_cgroup *root, |
375 | struct mem_cgroup *memcg); | |
241994ed | 376 | |
d9eb1ea2 | 377 | int mem_cgroup_charge(struct page *page, struct mm_struct *mm, gfp_t gfp_mask); |
3fea5a49 | 378 | |
0a31bc97 | 379 | void mem_cgroup_uncharge(struct page *page); |
747db954 | 380 | void mem_cgroup_uncharge_list(struct list_head *page_list); |
569b846d | 381 | |
6a93ca8f | 382 | void mem_cgroup_migrate(struct page *oldpage, struct page *newpage); |
569b846d | 383 | |
ef8f2327 MG |
384 | static struct mem_cgroup_per_node * |
385 | mem_cgroup_nodeinfo(struct mem_cgroup *memcg, int nid) | |
55779ec7 | 386 | { |
ef8f2327 | 387 | return memcg->nodeinfo[nid]; |
55779ec7 JW |
388 | } |
389 | ||
390 | /** | |
867e5e1d | 391 | * mem_cgroup_lruvec - get the lru list vector for a memcg & node |
55779ec7 JW |
392 | * @memcg: memcg of the wanted lruvec |
393 | * | |
867e5e1d JW |
394 | * Returns the lru list vector holding pages for a given @memcg & |
395 | * @node combination. This can be the node lruvec, if the memory | |
396 | * controller is disabled. | |
55779ec7 | 397 | */ |
867e5e1d JW |
398 | static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg, |
399 | struct pglist_data *pgdat) | |
55779ec7 | 400 | { |
ef8f2327 | 401 | struct mem_cgroup_per_node *mz; |
55779ec7 JW |
402 | struct lruvec *lruvec; |
403 | ||
404 | if (mem_cgroup_disabled()) { | |
867e5e1d | 405 | lruvec = &pgdat->__lruvec; |
55779ec7 JW |
406 | goto out; |
407 | } | |
408 | ||
1b05117d JW |
409 | if (!memcg) |
410 | memcg = root_mem_cgroup; | |
411 | ||
ef8f2327 | 412 | mz = mem_cgroup_nodeinfo(memcg, pgdat->node_id); |
55779ec7 JW |
413 | lruvec = &mz->lruvec; |
414 | out: | |
415 | /* | |
416 | * Since a node can be onlined after the mem_cgroup was created, | |
599d0c95 | 417 | * we have to be prepared to initialize lruvec->pgdat here; |
55779ec7 JW |
418 | * and if offlined then reonlined, we need to reinitialize it. |
419 | */ | |
ef8f2327 MG |
420 | if (unlikely(lruvec->pgdat != pgdat)) |
421 | lruvec->pgdat = pgdat; | |
55779ec7 JW |
422 | return lruvec; |
423 | } | |
424 | ||
599d0c95 | 425 | struct lruvec *mem_cgroup_page_lruvec(struct page *, struct pglist_data *); |
c9b0ed51 | 426 | |
64219994 | 427 | struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
e993d905 | 428 | |
d46eb14b SB |
429 | struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm); |
430 | ||
f745c6f5 SB |
431 | struct mem_cgroup *get_mem_cgroup_from_page(struct page *page); |
432 | ||
33398cf2 MH |
433 | static inline |
434 | struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){ | |
435 | return css ? container_of(css, struct mem_cgroup, css) : NULL; | |
436 | } | |
437 | ||
bf4f0599 RG |
438 | static inline bool obj_cgroup_tryget(struct obj_cgroup *objcg) |
439 | { | |
440 | return percpu_ref_tryget(&objcg->refcnt); | |
441 | } | |
442 | ||
443 | static inline void obj_cgroup_get(struct obj_cgroup *objcg) | |
444 | { | |
445 | percpu_ref_get(&objcg->refcnt); | |
446 | } | |
447 | ||
448 | static inline void obj_cgroup_put(struct obj_cgroup *objcg) | |
449 | { | |
450 | percpu_ref_put(&objcg->refcnt); | |
451 | } | |
452 | ||
453 | /* | |
454 | * After the initialization objcg->memcg is always pointing at | |
455 | * a valid memcg, but can be atomically swapped to the parent memcg. | |
456 | * | |
457 | * The caller must ensure that the returned memcg won't be released: | |
458 | * e.g. acquire the rcu_read_lock or css_set_lock. | |
459 | */ | |
460 | static inline struct mem_cgroup *obj_cgroup_memcg(struct obj_cgroup *objcg) | |
461 | { | |
462 | return READ_ONCE(objcg->memcg); | |
463 | } | |
464 | ||
dc0b5864 RG |
465 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
466 | { | |
d46eb14b SB |
467 | if (memcg) |
468 | css_put(&memcg->css); | |
dc0b5864 RG |
469 | } |
470 | ||
8e8ae645 JW |
471 | #define mem_cgroup_from_counter(counter, member) \ |
472 | container_of(counter, struct mem_cgroup, member) | |
473 | ||
33398cf2 MH |
474 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
475 | struct mem_cgroup *, | |
476 | struct mem_cgroup_reclaim_cookie *); | |
477 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); | |
7c5f64f8 VD |
478 | int mem_cgroup_scan_tasks(struct mem_cgroup *, |
479 | int (*)(struct task_struct *, void *), void *); | |
33398cf2 | 480 | |
23047a96 JW |
481 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
482 | { | |
483 | if (mem_cgroup_disabled()) | |
484 | return 0; | |
485 | ||
73f576c0 | 486 | return memcg->id.id; |
23047a96 | 487 | } |
73f576c0 | 488 | struct mem_cgroup *mem_cgroup_from_id(unsigned short id); |
23047a96 | 489 | |
aa9694bb CD |
490 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
491 | { | |
492 | return mem_cgroup_from_css(seq_css(m)); | |
493 | } | |
494 | ||
2262185c RG |
495 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
496 | { | |
497 | struct mem_cgroup_per_node *mz; | |
498 | ||
499 | if (mem_cgroup_disabled()) | |
500 | return NULL; | |
501 | ||
502 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
503 | return mz->memcg; | |
504 | } | |
505 | ||
8e8ae645 JW |
506 | /** |
507 | * parent_mem_cgroup - find the accounting parent of a memcg | |
508 | * @memcg: memcg whose parent to find | |
509 | * | |
510 | * Returns the parent memcg, or NULL if this is the root or the memory | |
511 | * controller is in legacy no-hierarchy mode. | |
512 | */ | |
513 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) | |
514 | { | |
515 | if (!memcg->memory.parent) | |
516 | return NULL; | |
517 | return mem_cgroup_from_counter(memcg->memory.parent, memory); | |
518 | } | |
519 | ||
33398cf2 MH |
520 | static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, |
521 | struct mem_cgroup *root) | |
522 | { | |
523 | if (root == memcg) | |
524 | return true; | |
525 | if (!root->use_hierarchy) | |
526 | return false; | |
527 | return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup); | |
528 | } | |
e1aab161 | 529 | |
2314b42d JW |
530 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
531 | struct mem_cgroup *memcg) | |
2e4d4091 | 532 | { |
587af308 | 533 | struct mem_cgroup *task_memcg; |
413918bb | 534 | bool match = false; |
c3ac9a8a | 535 | |
2e4d4091 | 536 | rcu_read_lock(); |
587af308 | 537 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
413918bb | 538 | if (task_memcg) |
2314b42d | 539 | match = mem_cgroup_is_descendant(task_memcg, memcg); |
2e4d4091 | 540 | rcu_read_unlock(); |
c3ac9a8a | 541 | return match; |
2e4d4091 | 542 | } |
8a9f3ccd | 543 | |
64219994 | 544 | struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page); |
2fc04524 | 545 | ino_t page_cgroup_ino(struct page *page); |
d324236b | 546 | |
eb01aaab VD |
547 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
548 | { | |
549 | if (mem_cgroup_disabled()) | |
550 | return true; | |
551 | return !!(memcg->css.flags & CSS_ONLINE); | |
552 | } | |
553 | ||
58ae83db KH |
554 | /* |
555 | * For memory reclaim. | |
556 | */ | |
889976db | 557 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
33398cf2 MH |
558 | |
559 | void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, | |
b4536f0c | 560 | int zid, int nr_pages); |
33398cf2 | 561 | |
b4536f0c MH |
562 | static inline |
563 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
564 | enum lru_list lru, int zone_idx) | |
565 | { | |
566 | struct mem_cgroup_per_node *mz; | |
567 | ||
568 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
569 | return mz->lru_zone_size[zone_idx][lru]; | |
33398cf2 MH |
570 | } |
571 | ||
b23afb93 TH |
572 | void mem_cgroup_handle_over_high(void); |
573 | ||
bbec2e15 | 574 | unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg); |
7c5f64f8 | 575 | |
9783aa99 CD |
576 | unsigned long mem_cgroup_size(struct mem_cgroup *memcg); |
577 | ||
f0c867d9 | 578 | void mem_cgroup_print_oom_context(struct mem_cgroup *memcg, |
64219994 | 579 | struct task_struct *p); |
58ae83db | 580 | |
f0c867d9 | 581 | void mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg); |
582 | ||
29ef680a | 583 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 | 584 | { |
29ef680a MH |
585 | WARN_ON(current->in_user_fault); |
586 | current->in_user_fault = 1; | |
519e5247 JW |
587 | } |
588 | ||
29ef680a | 589 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 | 590 | { |
29ef680a MH |
591 | WARN_ON(!current->in_user_fault); |
592 | current->in_user_fault = 0; | |
519e5247 JW |
593 | } |
594 | ||
3812c8c8 JW |
595 | static inline bool task_in_memcg_oom(struct task_struct *p) |
596 | { | |
626ebc41 | 597 | return p->memcg_in_oom; |
3812c8c8 JW |
598 | } |
599 | ||
49426420 | 600 | bool mem_cgroup_oom_synchronize(bool wait); |
3d8b38eb RG |
601 | struct mem_cgroup *mem_cgroup_get_oom_group(struct task_struct *victim, |
602 | struct mem_cgroup *oom_domain); | |
603 | void mem_cgroup_print_oom_group(struct mem_cgroup *memcg); | |
3812c8c8 | 604 | |
c255a458 | 605 | #ifdef CONFIG_MEMCG_SWAP |
eccb52e7 | 606 | extern bool cgroup_memory_noswap; |
c077719b | 607 | #endif |
f8d66542 | 608 | |
739f79fc JW |
609 | struct mem_cgroup *lock_page_memcg(struct page *page); |
610 | void __unlock_page_memcg(struct mem_cgroup *memcg); | |
62cccb8c | 611 | void unlock_page_memcg(struct page *page); |
d7365e78 | 612 | |
42a30035 JW |
613 | /* |
614 | * idx can be of type enum memcg_stat_item or node_stat_item. | |
615 | * Keep in sync with memcg_exact_page_state(). | |
616 | */ | |
617 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx) | |
618 | { | |
619 | long x = atomic_long_read(&memcg->vmstats[idx]); | |
620 | #ifdef CONFIG_SMP | |
621 | if (x < 0) | |
622 | x = 0; | |
623 | #endif | |
624 | return x; | |
625 | } | |
626 | ||
0b3d6e6f GT |
627 | /* |
628 | * idx can be of type enum memcg_stat_item or node_stat_item. | |
629 | * Keep in sync with memcg_exact_page_state(). | |
630 | */ | |
205b20cc JW |
631 | static inline unsigned long memcg_page_state_local(struct mem_cgroup *memcg, |
632 | int idx) | |
2a2e4885 | 633 | { |
815744d7 JW |
634 | long x = 0; |
635 | int cpu; | |
636 | ||
637 | for_each_possible_cpu(cpu) | |
638 | x += per_cpu(memcg->vmstats_local->stat[idx], cpu); | |
a983b5eb JW |
639 | #ifdef CONFIG_SMP |
640 | if (x < 0) | |
641 | x = 0; | |
642 | #endif | |
643 | return x; | |
2a2e4885 JW |
644 | } |
645 | ||
db9adbcb | 646 | void __mod_memcg_state(struct mem_cgroup *memcg, int idx, int val); |
2a2e4885 | 647 | |
04fecbf5 | 648 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 649 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 650 | int idx, int val) |
2a2e4885 | 651 | { |
c3cc3911 JW |
652 | unsigned long flags; |
653 | ||
654 | local_irq_save(flags); | |
a983b5eb | 655 | __mod_memcg_state(memcg, idx, val); |
c3cc3911 | 656 | local_irq_restore(flags); |
2a2e4885 JW |
657 | } |
658 | ||
33398cf2 | 659 | /** |
ccda7f43 | 660 | * mod_memcg_page_state - update page state statistics |
62cccb8c | 661 | * @page: the page |
33398cf2 MH |
662 | * @idx: page state item to account |
663 | * @val: number of pages (positive or negative) | |
664 | * | |
fdf1cdb9 JW |
665 | * The @page must be locked or the caller must use lock_page_memcg() |
666 | * to prevent double accounting when the page is concurrently being | |
667 | * moved to another memcg: | |
81f8c3a4 | 668 | * |
fdf1cdb9 | 669 | * lock_page(page) or lock_page_memcg(page) |
81f8c3a4 | 670 | * if (TestClearPageState(page)) |
ccda7f43 | 671 | * mod_memcg_page_state(page, state, -1); |
fdf1cdb9 | 672 | * unlock_page(page) or unlock_page_memcg(page) |
2a2e4885 JW |
673 | * |
674 | * Kernel pages are an exception to this, since they'll never move. | |
33398cf2 | 675 | */ |
00f3ca2c | 676 | static inline void __mod_memcg_page_state(struct page *page, |
04fecbf5 | 677 | int idx, int val) |
00f3ca2c JW |
678 | { |
679 | if (page->mem_cgroup) | |
680 | __mod_memcg_state(page->mem_cgroup, idx, val); | |
681 | } | |
682 | ||
ccda7f43 | 683 | static inline void mod_memcg_page_state(struct page *page, |
04fecbf5 | 684 | int idx, int val) |
33398cf2 | 685 | { |
62cccb8c | 686 | if (page->mem_cgroup) |
ccda7f43 | 687 | mod_memcg_state(page->mem_cgroup, idx, val); |
33398cf2 MH |
688 | } |
689 | ||
42a30035 JW |
690 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
691 | enum node_stat_item idx) | |
692 | { | |
693 | struct mem_cgroup_per_node *pn; | |
694 | long x; | |
695 | ||
696 | if (mem_cgroup_disabled()) | |
697 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
698 | ||
699 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
700 | x = atomic_long_read(&pn->lruvec_stat[idx]); | |
701 | #ifdef CONFIG_SMP | |
702 | if (x < 0) | |
703 | x = 0; | |
704 | #endif | |
705 | return x; | |
706 | } | |
707 | ||
205b20cc JW |
708 | static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
709 | enum node_stat_item idx) | |
2a7106f2 | 710 | { |
00f3ca2c | 711 | struct mem_cgroup_per_node *pn; |
815744d7 JW |
712 | long x = 0; |
713 | int cpu; | |
00f3ca2c JW |
714 | |
715 | if (mem_cgroup_disabled()) | |
716 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
717 | ||
718 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
815744d7 JW |
719 | for_each_possible_cpu(cpu) |
720 | x += per_cpu(pn->lruvec_stat_local->count[idx], cpu); | |
a983b5eb JW |
721 | #ifdef CONFIG_SMP |
722 | if (x < 0) | |
723 | x = 0; | |
724 | #endif | |
725 | return x; | |
2a7106f2 GT |
726 | } |
727 | ||
eedc4e5a RG |
728 | void __mod_memcg_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx, |
729 | int val); | |
db9adbcb JW |
730 | void __mod_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx, |
731 | int val); | |
ec9f0238 | 732 | void __mod_lruvec_slab_state(void *p, enum node_stat_item idx, int val); |
8380ce47 | 733 | void mod_memcg_obj_state(void *p, int idx, int val); |
00f3ca2c | 734 | |
eedc4e5a RG |
735 | static inline void mod_memcg_lruvec_state(struct lruvec *lruvec, |
736 | enum node_stat_item idx, int val) | |
737 | { | |
738 | unsigned long flags; | |
739 | ||
740 | local_irq_save(flags); | |
741 | __mod_memcg_lruvec_state(lruvec, idx, val); | |
742 | local_irq_restore(flags); | |
743 | } | |
744 | ||
00f3ca2c JW |
745 | static inline void mod_lruvec_state(struct lruvec *lruvec, |
746 | enum node_stat_item idx, int val) | |
747 | { | |
c3cc3911 JW |
748 | unsigned long flags; |
749 | ||
750 | local_irq_save(flags); | |
28454265 | 751 | __mod_lruvec_state(lruvec, idx, val); |
c3cc3911 | 752 | local_irq_restore(flags); |
00f3ca2c JW |
753 | } |
754 | ||
755 | static inline void __mod_lruvec_page_state(struct page *page, | |
756 | enum node_stat_item idx, int val) | |
757 | { | |
9da7b521 | 758 | struct page *head = compound_head(page); /* rmap on tail pages */ |
28454265 JW |
759 | pg_data_t *pgdat = page_pgdat(page); |
760 | struct lruvec *lruvec; | |
00f3ca2c | 761 | |
28454265 | 762 | /* Untracked pages have no memcg, no lruvec. Update only the node */ |
9da7b521 | 763 | if (!head->mem_cgroup) { |
28454265 | 764 | __mod_node_page_state(pgdat, idx, val); |
00f3ca2c | 765 | return; |
28454265 JW |
766 | } |
767 | ||
9da7b521 | 768 | lruvec = mem_cgroup_lruvec(head->mem_cgroup, pgdat); |
28454265 | 769 | __mod_lruvec_state(lruvec, idx, val); |
00f3ca2c JW |
770 | } |
771 | ||
772 | static inline void mod_lruvec_page_state(struct page *page, | |
773 | enum node_stat_item idx, int val) | |
774 | { | |
c3cc3911 JW |
775 | unsigned long flags; |
776 | ||
777 | local_irq_save(flags); | |
28454265 | 778 | __mod_lruvec_page_state(page, idx, val); |
c3cc3911 | 779 | local_irq_restore(flags); |
2a7106f2 GT |
780 | } |
781 | ||
ef8f2327 | 782 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
783 | gfp_t gfp_mask, |
784 | unsigned long *total_scanned); | |
a63d83f4 | 785 | |
db9adbcb JW |
786 | void __count_memcg_events(struct mem_cgroup *memcg, enum vm_event_item idx, |
787 | unsigned long count); | |
c9019e9b | 788 | |
2262185c | 789 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
e27be240 JW |
790 | enum vm_event_item idx, |
791 | unsigned long count) | |
2262185c | 792 | { |
c3cc3911 JW |
793 | unsigned long flags; |
794 | ||
795 | local_irq_save(flags); | |
a983b5eb | 796 | __count_memcg_events(memcg, idx, count); |
c3cc3911 | 797 | local_irq_restore(flags); |
2262185c RG |
798 | } |
799 | ||
800 | static inline void count_memcg_page_event(struct page *page, | |
e27be240 | 801 | enum vm_event_item idx) |
2262185c RG |
802 | { |
803 | if (page->mem_cgroup) | |
804 | count_memcg_events(page->mem_cgroup, idx, 1); | |
805 | } | |
806 | ||
807 | static inline void count_memcg_event_mm(struct mm_struct *mm, | |
808 | enum vm_event_item idx) | |
68ae564b | 809 | { |
33398cf2 MH |
810 | struct mem_cgroup *memcg; |
811 | ||
68ae564b DR |
812 | if (mem_cgroup_disabled()) |
813 | return; | |
33398cf2 MH |
814 | |
815 | rcu_read_lock(); | |
816 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
fe6bdfc8 | 817 | if (likely(memcg)) |
c9019e9b | 818 | count_memcg_events(memcg, idx, 1); |
33398cf2 | 819 | rcu_read_unlock(); |
68ae564b | 820 | } |
c9019e9b | 821 | |
e27be240 JW |
822 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
823 | enum memcg_memory_event event) | |
c9019e9b | 824 | { |
1e577f97 SB |
825 | atomic_long_inc(&memcg->memory_events_local[event]); |
826 | cgroup_file_notify(&memcg->events_local_file); | |
827 | ||
9852ae3f CD |
828 | do { |
829 | atomic_long_inc(&memcg->memory_events[event]); | |
830 | cgroup_file_notify(&memcg->events_file); | |
831 | ||
04fd61a4 YS |
832 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys)) |
833 | break; | |
9852ae3f CD |
834 | if (cgrp_dfl_root.flags & CGRP_ROOT_MEMORY_LOCAL_EVENTS) |
835 | break; | |
836 | } while ((memcg = parent_mem_cgroup(memcg)) && | |
837 | !mem_cgroup_is_root(memcg)); | |
c9019e9b JW |
838 | } |
839 | ||
fe6bdfc8 RG |
840 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
841 | enum memcg_memory_event event) | |
842 | { | |
843 | struct mem_cgroup *memcg; | |
844 | ||
845 | if (mem_cgroup_disabled()) | |
846 | return; | |
847 | ||
848 | rcu_read_lock(); | |
849 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
850 | if (likely(memcg)) | |
851 | memcg_memory_event(memcg, event); | |
852 | rcu_read_unlock(); | |
853 | } | |
854 | ||
ca3e0214 | 855 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
e94c8a9c | 856 | void mem_cgroup_split_huge_fixup(struct page *head); |
ca3e0214 KH |
857 | #endif |
858 | ||
c255a458 | 859 | #else /* CONFIG_MEMCG */ |
23047a96 JW |
860 | |
861 | #define MEM_CGROUP_ID_SHIFT 0 | |
862 | #define MEM_CGROUP_ID_MAX 0 | |
863 | ||
7a81b88c KH |
864 | struct mem_cgroup; |
865 | ||
dfd2f10c KT |
866 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
867 | { | |
868 | return true; | |
869 | } | |
870 | ||
23047a96 JW |
871 | static inline bool mem_cgroup_disabled(void) |
872 | { | |
873 | return true; | |
874 | } | |
875 | ||
e27be240 JW |
876 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
877 | enum memcg_memory_event event) | |
241994ed JW |
878 | { |
879 | } | |
880 | ||
fe6bdfc8 RG |
881 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
882 | enum memcg_memory_event event) | |
883 | { | |
884 | } | |
885 | ||
1bc63fb1 CD |
886 | static inline unsigned long mem_cgroup_protection(struct mem_cgroup *memcg, |
887 | bool in_low_reclaim) | |
9783aa99 | 888 | { |
1bc63fb1 | 889 | return 0; |
9783aa99 CD |
890 | } |
891 | ||
bf8d5d52 RG |
892 | static inline enum mem_cgroup_protection mem_cgroup_protected( |
893 | struct mem_cgroup *root, struct mem_cgroup *memcg) | |
241994ed | 894 | { |
bf8d5d52 | 895 | return MEMCG_PROT_NONE; |
241994ed JW |
896 | } |
897 | ||
3fea5a49 | 898 | static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm, |
d9eb1ea2 | 899 | gfp_t gfp_mask) |
3fea5a49 JW |
900 | { |
901 | return 0; | |
902 | } | |
903 | ||
0a31bc97 | 904 | static inline void mem_cgroup_uncharge(struct page *page) |
569b846d KH |
905 | { |
906 | } | |
907 | ||
747db954 | 908 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
8a9f3ccd BS |
909 | { |
910 | } | |
911 | ||
6a93ca8f | 912 | static inline void mem_cgroup_migrate(struct page *old, struct page *new) |
69029cd5 KH |
913 | { |
914 | } | |
915 | ||
867e5e1d JW |
916 | static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg, |
917 | struct pglist_data *pgdat) | |
08e552c6 | 918 | { |
867e5e1d | 919 | return &pgdat->__lruvec; |
08e552c6 KH |
920 | } |
921 | ||
fa9add64 | 922 | static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, |
599d0c95 | 923 | struct pglist_data *pgdat) |
66e1707b | 924 | { |
867e5e1d | 925 | return &pgdat->__lruvec; |
66e1707b BS |
926 | } |
927 | ||
b910718a JW |
928 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) |
929 | { | |
930 | return NULL; | |
931 | } | |
932 | ||
587af308 | 933 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
c0ff4b85 | 934 | struct mem_cgroup *memcg) |
bed7161a | 935 | { |
587af308 | 936 | return true; |
bed7161a BS |
937 | } |
938 | ||
d46eb14b SB |
939 | static inline struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm) |
940 | { | |
941 | return NULL; | |
942 | } | |
943 | ||
f745c6f5 SB |
944 | static inline struct mem_cgroup *get_mem_cgroup_from_page(struct page *page) |
945 | { | |
946 | return NULL; | |
947 | } | |
948 | ||
dc0b5864 RG |
949 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
950 | { | |
951 | } | |
952 | ||
5660048c JW |
953 | static inline struct mem_cgroup * |
954 | mem_cgroup_iter(struct mem_cgroup *root, | |
955 | struct mem_cgroup *prev, | |
956 | struct mem_cgroup_reclaim_cookie *reclaim) | |
957 | { | |
958 | return NULL; | |
959 | } | |
960 | ||
961 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
962 | struct mem_cgroup *prev) | |
963 | { | |
964 | } | |
965 | ||
7c5f64f8 VD |
966 | static inline int mem_cgroup_scan_tasks(struct mem_cgroup *memcg, |
967 | int (*fn)(struct task_struct *, void *), void *arg) | |
968 | { | |
969 | return 0; | |
970 | } | |
971 | ||
23047a96 | 972 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
f8d66542 | 973 | { |
23047a96 JW |
974 | return 0; |
975 | } | |
976 | ||
977 | static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id) | |
978 | { | |
979 | WARN_ON_ONCE(id); | |
980 | /* XXX: This should always return root_mem_cgroup */ | |
981 | return NULL; | |
f8d66542 | 982 | } |
a636b327 | 983 | |
aa9694bb CD |
984 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
985 | { | |
986 | return NULL; | |
987 | } | |
988 | ||
2262185c RG |
989 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
990 | { | |
991 | return NULL; | |
992 | } | |
993 | ||
eb01aaab | 994 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
14797e23 | 995 | { |
13308ca9 | 996 | return true; |
14797e23 KM |
997 | } |
998 | ||
b4536f0c MH |
999 | static inline |
1000 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
1001 | enum lru_list lru, int zone_idx) | |
1002 | { | |
1003 | return 0; | |
1004 | } | |
a3d8e054 | 1005 | |
bbec2e15 | 1006 | static inline unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg) |
7c5f64f8 VD |
1007 | { |
1008 | return 0; | |
1009 | } | |
1010 | ||
9783aa99 CD |
1011 | static inline unsigned long mem_cgroup_size(struct mem_cgroup *memcg) |
1012 | { | |
1013 | return 0; | |
1014 | } | |
1015 | ||
e222432b | 1016 | static inline void |
f0c867d9 | 1017 | mem_cgroup_print_oom_context(struct mem_cgroup *memcg, struct task_struct *p) |
1018 | { | |
1019 | } | |
1020 | ||
1021 | static inline void | |
1022 | mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg) | |
e222432b BS |
1023 | { |
1024 | } | |
1025 | ||
739f79fc JW |
1026 | static inline struct mem_cgroup *lock_page_memcg(struct page *page) |
1027 | { | |
1028 | return NULL; | |
1029 | } | |
1030 | ||
1031 | static inline void __unlock_page_memcg(struct mem_cgroup *memcg) | |
89c06bd5 KH |
1032 | { |
1033 | } | |
1034 | ||
62cccb8c | 1035 | static inline void unlock_page_memcg(struct page *page) |
89c06bd5 KH |
1036 | { |
1037 | } | |
1038 | ||
b23afb93 TH |
1039 | static inline void mem_cgroup_handle_over_high(void) |
1040 | { | |
1041 | } | |
1042 | ||
29ef680a | 1043 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 JW |
1044 | { |
1045 | } | |
1046 | ||
29ef680a | 1047 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 JW |
1048 | { |
1049 | } | |
1050 | ||
3812c8c8 JW |
1051 | static inline bool task_in_memcg_oom(struct task_struct *p) |
1052 | { | |
1053 | return false; | |
1054 | } | |
1055 | ||
49426420 | 1056 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
3812c8c8 JW |
1057 | { |
1058 | return false; | |
1059 | } | |
1060 | ||
3d8b38eb RG |
1061 | static inline struct mem_cgroup *mem_cgroup_get_oom_group( |
1062 | struct task_struct *victim, struct mem_cgroup *oom_domain) | |
1063 | { | |
1064 | return NULL; | |
1065 | } | |
1066 | ||
1067 | static inline void mem_cgroup_print_oom_group(struct mem_cgroup *memcg) | |
1068 | { | |
1069 | } | |
1070 | ||
42a30035 JW |
1071 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx) |
1072 | { | |
1073 | return 0; | |
1074 | } | |
1075 | ||
205b20cc JW |
1076 | static inline unsigned long memcg_page_state_local(struct mem_cgroup *memcg, |
1077 | int idx) | |
2a2e4885 JW |
1078 | { |
1079 | return 0; | |
1080 | } | |
1081 | ||
00f3ca2c | 1082 | static inline void __mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1083 | int idx, |
00f3ca2c | 1084 | int nr) |
2a2e4885 JW |
1085 | { |
1086 | } | |
1087 | ||
00f3ca2c | 1088 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1089 | int idx, |
00f3ca2c | 1090 | int nr) |
2a2e4885 JW |
1091 | { |
1092 | } | |
1093 | ||
00f3ca2c | 1094 | static inline void __mod_memcg_page_state(struct page *page, |
04fecbf5 | 1095 | int idx, |
00f3ca2c | 1096 | int nr) |
2a2e4885 JW |
1097 | { |
1098 | } | |
1099 | ||
ccda7f43 | 1100 | static inline void mod_memcg_page_state(struct page *page, |
04fecbf5 | 1101 | int idx, |
ccda7f43 | 1102 | int nr) |
553af430 JW |
1103 | { |
1104 | } | |
1105 | ||
42a30035 JW |
1106 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
1107 | enum node_stat_item idx) | |
1108 | { | |
1109 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
1110 | } | |
1111 | ||
205b20cc JW |
1112 | static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
1113 | enum node_stat_item idx) | |
2a7106f2 | 1114 | { |
00f3ca2c | 1115 | return node_page_state(lruvec_pgdat(lruvec), idx); |
2a7106f2 GT |
1116 | } |
1117 | ||
eedc4e5a RG |
1118 | static inline void __mod_memcg_lruvec_state(struct lruvec *lruvec, |
1119 | enum node_stat_item idx, int val) | |
1120 | { | |
1121 | } | |
1122 | ||
00f3ca2c JW |
1123 | static inline void __mod_lruvec_state(struct lruvec *lruvec, |
1124 | enum node_stat_item idx, int val) | |
d69b042f | 1125 | { |
00f3ca2c JW |
1126 | __mod_node_page_state(lruvec_pgdat(lruvec), idx, val); |
1127 | } | |
1128 | ||
1129 | static inline void mod_lruvec_state(struct lruvec *lruvec, | |
1130 | enum node_stat_item idx, int val) | |
1131 | { | |
1132 | mod_node_page_state(lruvec_pgdat(lruvec), idx, val); | |
1133 | } | |
1134 | ||
1135 | static inline void __mod_lruvec_page_state(struct page *page, | |
1136 | enum node_stat_item idx, int val) | |
1137 | { | |
1138 | __mod_node_page_state(page_pgdat(page), idx, val); | |
1139 | } | |
1140 | ||
1141 | static inline void mod_lruvec_page_state(struct page *page, | |
1142 | enum node_stat_item idx, int val) | |
1143 | { | |
1144 | mod_node_page_state(page_pgdat(page), idx, val); | |
d69b042f BS |
1145 | } |
1146 | ||
ec9f0238 RG |
1147 | static inline void __mod_lruvec_slab_state(void *p, enum node_stat_item idx, |
1148 | int val) | |
1149 | { | |
1150 | struct page *page = virt_to_head_page(p); | |
1151 | ||
1152 | __mod_node_page_state(page_pgdat(page), idx, val); | |
1153 | } | |
1154 | ||
8380ce47 RG |
1155 | static inline void mod_memcg_obj_state(void *p, int idx, int val) |
1156 | { | |
1157 | } | |
1158 | ||
4e416953 | 1159 | static inline |
ef8f2327 | 1160 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
1161 | gfp_t gfp_mask, |
1162 | unsigned long *total_scanned) | |
4e416953 | 1163 | { |
0608f43d | 1164 | return 0; |
4e416953 BS |
1165 | } |
1166 | ||
e94c8a9c | 1167 | static inline void mem_cgroup_split_huge_fixup(struct page *head) |
ca3e0214 KH |
1168 | { |
1169 | } | |
1170 | ||
2262185c RG |
1171 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
1172 | enum vm_event_item idx, | |
1173 | unsigned long count) | |
1174 | { | |
1175 | } | |
1176 | ||
9851ac13 KT |
1177 | static inline void __count_memcg_events(struct mem_cgroup *memcg, |
1178 | enum vm_event_item idx, | |
1179 | unsigned long count) | |
1180 | { | |
1181 | } | |
1182 | ||
2262185c | 1183 | static inline void count_memcg_page_event(struct page *page, |
04fecbf5 | 1184 | int idx) |
2262185c RG |
1185 | { |
1186 | } | |
1187 | ||
456f998e | 1188 | static inline |
2262185c | 1189 | void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx) |
456f998e YH |
1190 | { |
1191 | } | |
c255a458 | 1192 | #endif /* CONFIG_MEMCG */ |
78fb7466 | 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 | ||
ec9f0238 RG |
1246 | static inline void __inc_lruvec_slab_state(void *p, enum node_stat_item idx) |
1247 | { | |
1248 | __mod_lruvec_slab_state(p, idx, 1); | |
1249 | } | |
1250 | ||
1251 | static inline void __dec_lruvec_slab_state(void *p, enum node_stat_item idx) | |
1252 | { | |
1253 | __mod_lruvec_slab_state(p, idx, -1); | |
1254 | } | |
1255 | ||
04fecbf5 | 1256 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1257 | static inline void inc_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1258 | int idx) |
00f3ca2c JW |
1259 | { |
1260 | mod_memcg_state(memcg, idx, 1); | |
1261 | } | |
1262 | ||
04fecbf5 | 1263 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1264 | static inline void dec_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1265 | int idx) |
00f3ca2c JW |
1266 | { |
1267 | mod_memcg_state(memcg, idx, -1); | |
1268 | } | |
1269 | ||
04fecbf5 | 1270 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1271 | static inline void inc_memcg_page_state(struct page *page, |
04fecbf5 | 1272 | int idx) |
00f3ca2c JW |
1273 | { |
1274 | mod_memcg_page_state(page, idx, 1); | |
1275 | } | |
1276 | ||
04fecbf5 | 1277 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1278 | static inline void dec_memcg_page_state(struct page *page, |
04fecbf5 | 1279 | int idx) |
00f3ca2c JW |
1280 | { |
1281 | mod_memcg_page_state(page, idx, -1); | |
1282 | } | |
1283 | ||
1284 | static inline void inc_lruvec_state(struct lruvec *lruvec, | |
1285 | enum node_stat_item idx) | |
1286 | { | |
1287 | mod_lruvec_state(lruvec, idx, 1); | |
1288 | } | |
1289 | ||
1290 | static inline void dec_lruvec_state(struct lruvec *lruvec, | |
1291 | enum node_stat_item idx) | |
1292 | { | |
1293 | mod_lruvec_state(lruvec, idx, -1); | |
1294 | } | |
1295 | ||
1296 | static inline void inc_lruvec_page_state(struct page *page, | |
1297 | enum node_stat_item idx) | |
1298 | { | |
1299 | mod_lruvec_page_state(page, idx, 1); | |
1300 | } | |
1301 | ||
1302 | static inline void dec_lruvec_page_state(struct page *page, | |
1303 | enum node_stat_item idx) | |
1304 | { | |
1305 | mod_lruvec_page_state(page, idx, -1); | |
1306 | } | |
1307 | ||
7cf111bc JW |
1308 | static inline struct lruvec *parent_lruvec(struct lruvec *lruvec) |
1309 | { | |
1310 | struct mem_cgroup *memcg; | |
1311 | ||
1312 | memcg = lruvec_memcg(lruvec); | |
1313 | if (!memcg) | |
1314 | return NULL; | |
1315 | memcg = parent_mem_cgroup(memcg); | |
1316 | if (!memcg) | |
1317 | return NULL; | |
1318 | return mem_cgroup_lruvec(memcg, lruvec_pgdat(lruvec)); | |
1319 | } | |
1320 | ||
52ebea74 | 1321 | #ifdef CONFIG_CGROUP_WRITEBACK |
841710aa | 1322 | |
841710aa | 1323 | struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb); |
c5edf9cd TH |
1324 | void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages, |
1325 | unsigned long *pheadroom, unsigned long *pdirty, | |
1326 | unsigned long *pwriteback); | |
841710aa | 1327 | |
97b27821 TH |
1328 | void mem_cgroup_track_foreign_dirty_slowpath(struct page *page, |
1329 | struct bdi_writeback *wb); | |
1330 | ||
1331 | static inline void mem_cgroup_track_foreign_dirty(struct page *page, | |
1332 | struct bdi_writeback *wb) | |
1333 | { | |
08d1d0e6 BH |
1334 | if (mem_cgroup_disabled()) |
1335 | return; | |
1336 | ||
97b27821 TH |
1337 | if (unlikely(&page->mem_cgroup->css != wb->memcg_css)) |
1338 | mem_cgroup_track_foreign_dirty_slowpath(page, wb); | |
1339 | } | |
1340 | ||
1341 | void mem_cgroup_flush_foreign(struct bdi_writeback *wb); | |
1342 | ||
841710aa TH |
1343 | #else /* CONFIG_CGROUP_WRITEBACK */ |
1344 | ||
1345 | static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb) | |
1346 | { | |
1347 | return NULL; | |
1348 | } | |
1349 | ||
c2aa723a | 1350 | static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb, |
c5edf9cd TH |
1351 | unsigned long *pfilepages, |
1352 | unsigned long *pheadroom, | |
c2aa723a TH |
1353 | unsigned long *pdirty, |
1354 | unsigned long *pwriteback) | |
1355 | { | |
1356 | } | |
1357 | ||
97b27821 TH |
1358 | static inline void mem_cgroup_track_foreign_dirty(struct page *page, |
1359 | struct bdi_writeback *wb) | |
1360 | { | |
1361 | } | |
1362 | ||
1363 | static inline void mem_cgroup_flush_foreign(struct bdi_writeback *wb) | |
1364 | { | |
1365 | } | |
1366 | ||
841710aa | 1367 | #endif /* CONFIG_CGROUP_WRITEBACK */ |
52ebea74 | 1368 | |
e1aab161 | 1369 | struct sock; |
baac50bb JW |
1370 | bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); |
1371 | void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); | |
d886f4e4 | 1372 | #ifdef CONFIG_MEMCG |
ef12947c JW |
1373 | extern struct static_key_false memcg_sockets_enabled_key; |
1374 | #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key) | |
2d758073 JW |
1375 | void mem_cgroup_sk_alloc(struct sock *sk); |
1376 | void mem_cgroup_sk_free(struct sock *sk); | |
baac50bb | 1377 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c | 1378 | { |
0db15298 | 1379 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && memcg->tcpmem_pressure) |
8e8ae645 | 1380 | return true; |
8e8ae645 JW |
1381 | do { |
1382 | if (time_before(jiffies, memcg->socket_pressure)) | |
1383 | return true; | |
1384 | } while ((memcg = parent_mem_cgroup(memcg))); | |
1385 | return false; | |
e805605c | 1386 | } |
0a432dcb YS |
1387 | |
1388 | extern int memcg_expand_shrinker_maps(int new_id); | |
1389 | ||
1390 | extern void memcg_set_shrinker_bit(struct mem_cgroup *memcg, | |
1391 | int nid, int shrinker_id); | |
e805605c | 1392 | #else |
80e95fe0 | 1393 | #define mem_cgroup_sockets_enabled 0 |
2d758073 JW |
1394 | static inline void mem_cgroup_sk_alloc(struct sock *sk) { }; |
1395 | static inline void mem_cgroup_sk_free(struct sock *sk) { }; | |
baac50bb | 1396 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c JW |
1397 | { |
1398 | return false; | |
1399 | } | |
0a432dcb YS |
1400 | |
1401 | static inline void memcg_set_shrinker_bit(struct mem_cgroup *memcg, | |
1402 | int nid, int shrinker_id) | |
1403 | { | |
1404 | } | |
e805605c | 1405 | #endif |
7ae1e1d0 | 1406 | |
45264778 VD |
1407 | struct kmem_cache *memcg_kmem_get_cache(struct kmem_cache *cachep); |
1408 | void memcg_kmem_put_cache(struct kmem_cache *cachep); | |
9b6f7e16 RG |
1409 | |
1410 | #ifdef CONFIG_MEMCG_KMEM | |
4b13f64d RG |
1411 | int __memcg_kmem_charge(struct mem_cgroup *memcg, gfp_t gfp, |
1412 | unsigned int nr_pages); | |
1413 | void __memcg_kmem_uncharge(struct mem_cgroup *memcg, unsigned int nr_pages); | |
f4b00eab RG |
1414 | int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, int order); |
1415 | void __memcg_kmem_uncharge_page(struct page *page, int order); | |
45264778 | 1416 | |
bf4f0599 RG |
1417 | struct obj_cgroup *get_obj_cgroup_from_current(void); |
1418 | ||
1419 | int obj_cgroup_charge(struct obj_cgroup *objcg, gfp_t gfp, size_t size); | |
1420 | void obj_cgroup_uncharge(struct obj_cgroup *objcg, size_t size); | |
1421 | ||
ef12947c | 1422 | extern struct static_key_false memcg_kmem_enabled_key; |
17cc4dfe | 1423 | extern struct workqueue_struct *memcg_kmem_cache_wq; |
749c5415 | 1424 | |
dbcf73e2 | 1425 | extern int memcg_nr_cache_ids; |
64219994 MH |
1426 | void memcg_get_cache_ids(void); |
1427 | void memcg_put_cache_ids(void); | |
ebe945c2 GC |
1428 | |
1429 | /* | |
1430 | * Helper macro to loop through all memcg-specific caches. Callers must still | |
1431 | * check if the cache is valid (it is either valid or NULL). | |
1432 | * the slab_mutex must be held when looping through those caches | |
1433 | */ | |
749c5415 | 1434 | #define for_each_memcg_cache_index(_idx) \ |
dbcf73e2 | 1435 | for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++) |
749c5415 | 1436 | |
7ae1e1d0 GC |
1437 | static inline bool memcg_kmem_enabled(void) |
1438 | { | |
ef12947c | 1439 | return static_branch_unlikely(&memcg_kmem_enabled_key); |
7ae1e1d0 GC |
1440 | } |
1441 | ||
f4b00eab RG |
1442 | static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1443 | int order) | |
60cd4bcd SB |
1444 | { |
1445 | if (memcg_kmem_enabled()) | |
f4b00eab | 1446 | return __memcg_kmem_charge_page(page, gfp, order); |
60cd4bcd SB |
1447 | return 0; |
1448 | } | |
1449 | ||
f4b00eab | 1450 | static inline void memcg_kmem_uncharge_page(struct page *page, int order) |
60cd4bcd SB |
1451 | { |
1452 | if (memcg_kmem_enabled()) | |
f4b00eab | 1453 | __memcg_kmem_uncharge_page(page, order); |
60cd4bcd SB |
1454 | } |
1455 | ||
4b13f64d RG |
1456 | static inline int memcg_kmem_charge(struct mem_cgroup *memcg, gfp_t gfp, |
1457 | unsigned int nr_pages) | |
60cd4bcd SB |
1458 | { |
1459 | if (memcg_kmem_enabled()) | |
4b13f64d | 1460 | return __memcg_kmem_charge(memcg, gfp, nr_pages); |
60cd4bcd SB |
1461 | return 0; |
1462 | } | |
49a18eae | 1463 | |
4b13f64d RG |
1464 | static inline void memcg_kmem_uncharge(struct mem_cgroup *memcg, |
1465 | unsigned int nr_pages) | |
49a18eae RG |
1466 | { |
1467 | if (memcg_kmem_enabled()) | |
4b13f64d | 1468 | __memcg_kmem_uncharge(memcg, nr_pages); |
49a18eae RG |
1469 | } |
1470 | ||
33398cf2 | 1471 | /* |
9f706d68 | 1472 | * helper for accessing a memcg's index. It will be used as an index in the |
33398cf2 MH |
1473 | * child cache array in kmem_cache, and also to derive its name. This function |
1474 | * will return -1 when this is not a kmem-limited memcg. | |
1475 | */ | |
1476 | static inline int memcg_cache_id(struct mem_cgroup *memcg) | |
1477 | { | |
1478 | return memcg ? memcg->kmemcg_id : -1; | |
1479 | } | |
5722d094 | 1480 | |
8380ce47 RG |
1481 | struct mem_cgroup *mem_cgroup_from_obj(void *p); |
1482 | ||
7ae1e1d0 | 1483 | #else |
9b6f7e16 | 1484 | |
f4b00eab RG |
1485 | static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1486 | int order) | |
9b6f7e16 RG |
1487 | { |
1488 | return 0; | |
1489 | } | |
1490 | ||
f4b00eab | 1491 | static inline void memcg_kmem_uncharge_page(struct page *page, int order) |
9b6f7e16 RG |
1492 | { |
1493 | } | |
1494 | ||
f4b00eab RG |
1495 | static inline int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1496 | int order) | |
60cd4bcd SB |
1497 | { |
1498 | return 0; | |
1499 | } | |
1500 | ||
f4b00eab | 1501 | static inline void __memcg_kmem_uncharge_page(struct page *page, int order) |
60cd4bcd SB |
1502 | { |
1503 | } | |
1504 | ||
749c5415 GC |
1505 | #define for_each_memcg_cache_index(_idx) \ |
1506 | for (; NULL; ) | |
1507 | ||
b9ce5ef4 GC |
1508 | static inline bool memcg_kmem_enabled(void) |
1509 | { | |
1510 | return false; | |
1511 | } | |
1512 | ||
2633d7a0 GC |
1513 | static inline int memcg_cache_id(struct mem_cgroup *memcg) |
1514 | { | |
1515 | return -1; | |
1516 | } | |
1517 | ||
05257a1a VD |
1518 | static inline void memcg_get_cache_ids(void) |
1519 | { | |
1520 | } | |
1521 | ||
1522 | static inline void memcg_put_cache_ids(void) | |
1523 | { | |
1524 | } | |
1525 | ||
8380ce47 RG |
1526 | static inline struct mem_cgroup *mem_cgroup_from_obj(void *p) |
1527 | { | |
1528 | return NULL; | |
1529 | } | |
1530 | ||
84c07d11 | 1531 | #endif /* CONFIG_MEMCG_KMEM */ |
127424c8 | 1532 | |
8cdea7c0 | 1533 | #endif /* _LINUX_MEMCONTROL_H */ |