Commit | Line | Data |
---|---|---|
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 | 34 | MEMCG_SOCK, |
772616b0 | 35 | MEMCG_PERCPU_B, |
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 | ||
5660048c | 51 | struct mem_cgroup_reclaim_cookie { |
ef8f2327 | 52 | pg_data_t *pgdat; |
5660048c JW |
53 | unsigned int generation; |
54 | }; | |
55 | ||
71cd3113 JW |
56 | #ifdef CONFIG_MEMCG |
57 | ||
58 | #define MEM_CGROUP_ID_SHIFT 16 | |
59 | #define MEM_CGROUP_ID_MAX USHRT_MAX | |
60 | ||
61 | struct mem_cgroup_id { | |
62 | int id; | |
1c2d479a | 63 | refcount_t ref; |
71cd3113 JW |
64 | }; |
65 | ||
33398cf2 MH |
66 | /* |
67 | * Per memcg event counter is incremented at every pagein/pageout. With THP, | |
0845f831 RD |
68 | * it will be incremented by the number of pages. This counter is used |
69 | * to trigger some periodic events. This is straightforward and better | |
33398cf2 MH |
70 | * than using jiffies etc. to handle periodic memcg event. |
71 | */ | |
72 | enum mem_cgroup_events_target { | |
73 | MEM_CGROUP_TARGET_THRESH, | |
74 | MEM_CGROUP_TARGET_SOFTLIMIT, | |
33398cf2 MH |
75 | MEM_CGROUP_NTARGETS, |
76 | }; | |
77 | ||
871789d4 CD |
78 | struct memcg_vmstats_percpu { |
79 | long stat[MEMCG_NR_STAT]; | |
e27be240 | 80 | unsigned long events[NR_VM_EVENT_ITEMS]; |
33398cf2 MH |
81 | unsigned long nr_page_events; |
82 | unsigned long targets[MEM_CGROUP_NTARGETS]; | |
83 | }; | |
84 | ||
85 | struct mem_cgroup_reclaim_iter { | |
86 | struct mem_cgroup *position; | |
87 | /* scan generation, increased every round-trip */ | |
88 | unsigned int generation; | |
89 | }; | |
90 | ||
00f3ca2c JW |
91 | struct lruvec_stat { |
92 | long count[NR_VM_NODE_STAT_ITEMS]; | |
93 | }; | |
94 | ||
0a4465d3 KT |
95 | /* |
96 | * Bitmap of shrinker::id corresponding to memcg-aware shrinkers, | |
97 | * which have elements charged to this memcg. | |
98 | */ | |
99 | struct memcg_shrinker_map { | |
100 | struct rcu_head rcu; | |
307ed94c | 101 | unsigned long map[]; |
0a4465d3 KT |
102 | }; |
103 | ||
33398cf2 | 104 | /* |
242c37b4 | 105 | * per-node information in memory controller. |
33398cf2 | 106 | */ |
ef8f2327 | 107 | struct mem_cgroup_per_node { |
33398cf2 | 108 | struct lruvec lruvec; |
a983b5eb | 109 | |
815744d7 JW |
110 | /* Legacy local VM stats */ |
111 | struct lruvec_stat __percpu *lruvec_stat_local; | |
112 | ||
113 | /* Subtree VM stats (batched updates) */ | |
a983b5eb JW |
114 | struct lruvec_stat __percpu *lruvec_stat_cpu; |
115 | atomic_long_t lruvec_stat[NR_VM_NODE_STAT_ITEMS]; | |
116 | ||
b4536f0c | 117 | unsigned long lru_zone_size[MAX_NR_ZONES][NR_LRU_LISTS]; |
33398cf2 | 118 | |
9da83f3f | 119 | struct mem_cgroup_reclaim_iter iter; |
33398cf2 | 120 | |
0a4465d3 | 121 | struct memcg_shrinker_map __rcu *shrinker_map; |
0a432dcb | 122 | |
33398cf2 MH |
123 | struct rb_node tree_node; /* RB tree node */ |
124 | unsigned long usage_in_excess;/* Set to the value by which */ | |
125 | /* the soft limit is exceeded*/ | |
126 | bool on_tree; | |
127 | struct mem_cgroup *memcg; /* Back pointer, we cannot */ | |
128 | /* use container_of */ | |
129 | }; | |
130 | ||
33398cf2 MH |
131 | struct mem_cgroup_threshold { |
132 | struct eventfd_ctx *eventfd; | |
133 | unsigned long threshold; | |
134 | }; | |
135 | ||
136 | /* For threshold */ | |
137 | struct mem_cgroup_threshold_ary { | |
138 | /* An array index points to threshold just below or equal to usage. */ | |
139 | int current_threshold; | |
140 | /* Size of entries[] */ | |
141 | unsigned int size; | |
142 | /* Array of thresholds */ | |
307ed94c | 143 | struct mem_cgroup_threshold entries[]; |
33398cf2 MH |
144 | }; |
145 | ||
146 | struct mem_cgroup_thresholds { | |
147 | /* Primary thresholds array */ | |
148 | struct mem_cgroup_threshold_ary *primary; | |
149 | /* | |
150 | * Spare threshold array. | |
151 | * This is needed to make mem_cgroup_unregister_event() "never fail". | |
152 | * It must be able to store at least primary->size - 1 entries. | |
153 | */ | |
154 | struct mem_cgroup_threshold_ary *spare; | |
155 | }; | |
156 | ||
567e9ab2 JW |
157 | enum memcg_kmem_state { |
158 | KMEM_NONE, | |
159 | KMEM_ALLOCATED, | |
160 | KMEM_ONLINE, | |
161 | }; | |
162 | ||
e81bf979 AL |
163 | #if defined(CONFIG_SMP) |
164 | struct memcg_padding { | |
165 | char x[0]; | |
166 | } ____cacheline_internodealigned_in_smp; | |
167 | #define MEMCG_PADDING(name) struct memcg_padding name; | |
168 | #else | |
169 | #define MEMCG_PADDING(name) | |
170 | #endif | |
171 | ||
97b27821 TH |
172 | /* |
173 | * Remember four most recent foreign writebacks with dirty pages in this | |
174 | * cgroup. Inode sharing is expected to be uncommon and, even if we miss | |
175 | * one in a given round, we're likely to catch it later if it keeps | |
176 | * foreign-dirtying, so a fairly low count should be enough. | |
177 | * | |
178 | * See mem_cgroup_track_foreign_dirty_slowpath() for details. | |
179 | */ | |
180 | #define MEMCG_CGWB_FRN_CNT 4 | |
181 | ||
182 | struct memcg_cgwb_frn { | |
183 | u64 bdi_id; /* bdi->id of the foreign inode */ | |
184 | int memcg_id; /* memcg->css.id of foreign inode */ | |
185 | u64 at; /* jiffies_64 at the time of dirtying */ | |
186 | struct wb_completion done; /* tracks in-flight foreign writebacks */ | |
187 | }; | |
188 | ||
bf4f0599 RG |
189 | /* |
190 | * Bucket for arbitrarily byte-sized objects charged to a memory | |
191 | * cgroup. The bucket can be reparented in one piece when the cgroup | |
192 | * is destroyed, without having to round up the individual references | |
193 | * of all live memory objects in the wild. | |
194 | */ | |
195 | struct obj_cgroup { | |
196 | struct percpu_ref refcnt; | |
197 | struct mem_cgroup *memcg; | |
198 | atomic_t nr_charged_bytes; | |
199 | union { | |
200 | struct list_head list; | |
201 | struct rcu_head rcu; | |
202 | }; | |
203 | }; | |
204 | ||
33398cf2 MH |
205 | /* |
206 | * The memory controller data structure. The memory controller controls both | |
207 | * page cache and RSS per cgroup. We would eventually like to provide | |
208 | * statistics based on the statistics developed by Rik Van Riel for clock-pro, | |
209 | * to help the administrator determine what knobs to tune. | |
210 | */ | |
211 | struct mem_cgroup { | |
212 | struct cgroup_subsys_state css; | |
213 | ||
73f576c0 JW |
214 | /* Private memcg ID. Used to ID objects that outlive the cgroup */ |
215 | struct mem_cgroup_id id; | |
216 | ||
33398cf2 MH |
217 | /* Accounted resources */ |
218 | struct page_counter memory; | |
37e84351 | 219 | struct page_counter swap; |
0db15298 JW |
220 | |
221 | /* Legacy consumer-oriented counters */ | |
33398cf2 MH |
222 | struct page_counter memsw; |
223 | struct page_counter kmem; | |
0db15298 | 224 | struct page_counter tcpmem; |
33398cf2 | 225 | |
f7e1cb6e JW |
226 | /* Range enforcement for interrupt charges */ |
227 | struct work_struct high_work; | |
228 | ||
33398cf2 MH |
229 | unsigned long soft_limit; |
230 | ||
231 | /* vmpressure notifications */ | |
232 | struct vmpressure vmpressure; | |
233 | ||
33398cf2 MH |
234 | /* |
235 | * Should the accounting and control be hierarchical, per subtree? | |
236 | */ | |
237 | bool use_hierarchy; | |
238 | ||
3d8b38eb RG |
239 | /* |
240 | * Should the OOM killer kill all belonging tasks, had it kill one? | |
241 | */ | |
242 | bool oom_group; | |
243 | ||
33398cf2 MH |
244 | /* protected by memcg_oom_lock */ |
245 | bool oom_lock; | |
246 | int under_oom; | |
247 | ||
248 | int swappiness; | |
249 | /* OOM-Killer disable */ | |
250 | int oom_kill_disable; | |
251 | ||
1e577f97 | 252 | /* memory.events and memory.events.local */ |
472912a2 | 253 | struct cgroup_file events_file; |
1e577f97 | 254 | struct cgroup_file events_local_file; |
472912a2 | 255 | |
f3a53a3a TH |
256 | /* handle for "memory.swap.events" */ |
257 | struct cgroup_file swap_events_file; | |
258 | ||
33398cf2 MH |
259 | /* protect arrays of thresholds */ |
260 | struct mutex thresholds_lock; | |
261 | ||
262 | /* thresholds for memory usage. RCU-protected */ | |
263 | struct mem_cgroup_thresholds thresholds; | |
264 | ||
265 | /* thresholds for mem+swap usage. RCU-protected */ | |
266 | struct mem_cgroup_thresholds memsw_thresholds; | |
267 | ||
268 | /* For oom notifier event fd */ | |
269 | struct list_head oom_notify; | |
270 | ||
271 | /* | |
272 | * Should we move charges of a task when a task is moved into this | |
273 | * mem_cgroup ? And what type of charges should we move ? | |
274 | */ | |
275 | unsigned long move_charge_at_immigrate; | |
e81bf979 AL |
276 | /* taken only while moving_account > 0 */ |
277 | spinlock_t move_lock; | |
278 | unsigned long move_lock_flags; | |
279 | ||
280 | MEMCG_PADDING(_pad1_); | |
281 | ||
33398cf2 MH |
282 | /* |
283 | * set > 0 if pages under this cgroup are moving to other cgroup. | |
284 | */ | |
285 | atomic_t moving_account; | |
33398cf2 | 286 | struct task_struct *move_lock_task; |
a983b5eb | 287 | |
815744d7 JW |
288 | /* Legacy local VM stats and events */ |
289 | struct memcg_vmstats_percpu __percpu *vmstats_local; | |
290 | ||
291 | /* Subtree VM stats and events (batched updates) */ | |
871789d4 | 292 | struct memcg_vmstats_percpu __percpu *vmstats_percpu; |
e81bf979 AL |
293 | |
294 | MEMCG_PADDING(_pad2_); | |
295 | ||
871789d4 CD |
296 | atomic_long_t vmstats[MEMCG_NR_STAT]; |
297 | atomic_long_t vmevents[NR_VM_EVENT_ITEMS]; | |
42a30035 | 298 | |
815744d7 | 299 | /* memory.events */ |
42a30035 | 300 | atomic_long_t memory_events[MEMCG_NR_MEMORY_EVENTS]; |
1e577f97 | 301 | atomic_long_t memory_events_local[MEMCG_NR_MEMORY_EVENTS]; |
33398cf2 | 302 | |
d886f4e4 JW |
303 | unsigned long socket_pressure; |
304 | ||
305 | /* Legacy tcp memory accounting */ | |
0db15298 JW |
306 | bool tcpmem_active; |
307 | int tcpmem_pressure; | |
d886f4e4 | 308 | |
84c07d11 | 309 | #ifdef CONFIG_MEMCG_KMEM |
33398cf2 MH |
310 | /* Index in the kmem_cache->memcg_params.memcg_caches array */ |
311 | int kmemcg_id; | |
567e9ab2 | 312 | enum memcg_kmem_state kmem_state; |
bf4f0599 RG |
313 | struct obj_cgroup __rcu *objcg; |
314 | struct list_head objcg_list; /* list of inherited objcgs */ | |
33398cf2 MH |
315 | #endif |
316 | ||
33398cf2 MH |
317 | #ifdef CONFIG_CGROUP_WRITEBACK |
318 | struct list_head cgwb_list; | |
319 | struct wb_domain cgwb_domain; | |
97b27821 | 320 | struct memcg_cgwb_frn cgwb_frn[MEMCG_CGWB_FRN_CNT]; |
33398cf2 MH |
321 | #endif |
322 | ||
323 | /* List of events which userspace want to receive */ | |
324 | struct list_head event_list; | |
325 | spinlock_t event_list_lock; | |
326 | ||
87eaceb3 YS |
327 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
328 | struct deferred_split deferred_split_queue; | |
329 | #endif | |
330 | ||
33398cf2 MH |
331 | struct mem_cgroup_per_node *nodeinfo[0]; |
332 | /* WARNING: nodeinfo must be the last member here */ | |
333 | }; | |
7d828602 | 334 | |
a983b5eb JW |
335 | /* |
336 | * size of first charge trial. "32" comes from vmscan.c's magic value. | |
337 | * TODO: maybe necessary to use big numbers in big irons. | |
338 | */ | |
339 | #define MEMCG_CHARGE_BATCH 32U | |
340 | ||
7d828602 | 341 | extern struct mem_cgroup *root_mem_cgroup; |
56161634 | 342 | |
772616b0 RG |
343 | static __always_inline bool memcg_stat_item_in_bytes(int idx) |
344 | { | |
345 | if (idx == MEMCG_PERCPU_B) | |
346 | return true; | |
347 | return vmstat_item_in_bytes(idx); | |
348 | } | |
349 | ||
dfd2f10c KT |
350 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
351 | { | |
352 | return (memcg == root_mem_cgroup); | |
353 | } | |
354 | ||
23047a96 JW |
355 | static inline bool mem_cgroup_disabled(void) |
356 | { | |
357 | return !cgroup_subsys_enabled(memory_cgrp_subsys); | |
358 | } | |
359 | ||
22f7496f YS |
360 | static inline unsigned long mem_cgroup_protection(struct mem_cgroup *root, |
361 | struct mem_cgroup *memcg, | |
1bc63fb1 | 362 | bool in_low_reclaim) |
9783aa99 | 363 | { |
1bc63fb1 CD |
364 | if (mem_cgroup_disabled()) |
365 | return 0; | |
366 | ||
22f7496f YS |
367 | /* |
368 | * There is no reclaim protection applied to a targeted reclaim. | |
369 | * We are special casing this specific case here because | |
370 | * mem_cgroup_protected calculation is not robust enough to keep | |
371 | * the protection invariant for calculated effective values for | |
372 | * parallel reclaimers with different reclaim target. This is | |
373 | * especially a problem for tail memcgs (as they have pages on LRU) | |
374 | * which would want to have effective values 0 for targeted reclaim | |
375 | * but a different value for external reclaim. | |
376 | * | |
377 | * Example | |
378 | * Let's have global and A's reclaim in parallel: | |
379 | * | | |
380 | * A (low=2G, usage = 3G, max = 3G, children_low_usage = 1.5G) | |
381 | * |\ | |
382 | * | C (low = 1G, usage = 2.5G) | |
383 | * B (low = 1G, usage = 0.5G) | |
384 | * | |
385 | * For the global reclaim | |
386 | * A.elow = A.low | |
387 | * B.elow = min(B.usage, B.low) because children_low_usage <= A.elow | |
388 | * C.elow = min(C.usage, C.low) | |
389 | * | |
390 | * With the effective values resetting we have A reclaim | |
391 | * A.elow = 0 | |
392 | * B.elow = B.low | |
393 | * C.elow = C.low | |
394 | * | |
395 | * If the global reclaim races with A's reclaim then | |
396 | * B.elow = C.elow = 0 because children_low_usage > A.elow) | |
397 | * is possible and reclaiming B would be violating the protection. | |
398 | * | |
399 | */ | |
400 | if (root == memcg) | |
401 | return 0; | |
402 | ||
1bc63fb1 CD |
403 | if (in_low_reclaim) |
404 | return READ_ONCE(memcg->memory.emin); | |
9783aa99 | 405 | |
1bc63fb1 CD |
406 | return max(READ_ONCE(memcg->memory.emin), |
407 | READ_ONCE(memcg->memory.elow)); | |
9783aa99 CD |
408 | } |
409 | ||
45c7f7e1 CD |
410 | void mem_cgroup_calculate_protection(struct mem_cgroup *root, |
411 | struct mem_cgroup *memcg); | |
412 | ||
413 | static inline bool mem_cgroup_supports_protection(struct mem_cgroup *memcg) | |
414 | { | |
415 | /* | |
416 | * The root memcg doesn't account charges, and doesn't support | |
417 | * protection. | |
418 | */ | |
419 | return !mem_cgroup_disabled() && !mem_cgroup_is_root(memcg); | |
420 | ||
421 | } | |
422 | ||
423 | static inline bool mem_cgroup_below_low(struct mem_cgroup *memcg) | |
424 | { | |
425 | if (!mem_cgroup_supports_protection(memcg)) | |
426 | return false; | |
427 | ||
428 | return READ_ONCE(memcg->memory.elow) >= | |
429 | page_counter_read(&memcg->memory); | |
430 | } | |
431 | ||
432 | static inline bool mem_cgroup_below_min(struct mem_cgroup *memcg) | |
433 | { | |
434 | if (!mem_cgroup_supports_protection(memcg)) | |
435 | return false; | |
436 | ||
437 | return READ_ONCE(memcg->memory.emin) >= | |
438 | page_counter_read(&memcg->memory); | |
439 | } | |
241994ed | 440 | |
d9eb1ea2 | 441 | int mem_cgroup_charge(struct page *page, struct mm_struct *mm, gfp_t gfp_mask); |
3fea5a49 | 442 | |
0a31bc97 | 443 | void mem_cgroup_uncharge(struct page *page); |
747db954 | 444 | void mem_cgroup_uncharge_list(struct list_head *page_list); |
569b846d | 445 | |
6a93ca8f | 446 | void mem_cgroup_migrate(struct page *oldpage, struct page *newpage); |
569b846d | 447 | |
ef8f2327 MG |
448 | static struct mem_cgroup_per_node * |
449 | mem_cgroup_nodeinfo(struct mem_cgroup *memcg, int nid) | |
55779ec7 | 450 | { |
ef8f2327 | 451 | return memcg->nodeinfo[nid]; |
55779ec7 JW |
452 | } |
453 | ||
454 | /** | |
867e5e1d | 455 | * mem_cgroup_lruvec - get the lru list vector for a memcg & node |
55779ec7 JW |
456 | * @memcg: memcg of the wanted lruvec |
457 | * | |
867e5e1d JW |
458 | * Returns the lru list vector holding pages for a given @memcg & |
459 | * @node combination. This can be the node lruvec, if the memory | |
460 | * controller is disabled. | |
55779ec7 | 461 | */ |
867e5e1d JW |
462 | static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg, |
463 | struct pglist_data *pgdat) | |
55779ec7 | 464 | { |
ef8f2327 | 465 | struct mem_cgroup_per_node *mz; |
55779ec7 JW |
466 | struct lruvec *lruvec; |
467 | ||
468 | if (mem_cgroup_disabled()) { | |
867e5e1d | 469 | lruvec = &pgdat->__lruvec; |
55779ec7 JW |
470 | goto out; |
471 | } | |
472 | ||
1b05117d JW |
473 | if (!memcg) |
474 | memcg = root_mem_cgroup; | |
475 | ||
ef8f2327 | 476 | mz = mem_cgroup_nodeinfo(memcg, pgdat->node_id); |
55779ec7 JW |
477 | lruvec = &mz->lruvec; |
478 | out: | |
479 | /* | |
480 | * Since a node can be onlined after the mem_cgroup was created, | |
599d0c95 | 481 | * we have to be prepared to initialize lruvec->pgdat here; |
55779ec7 JW |
482 | * and if offlined then reonlined, we need to reinitialize it. |
483 | */ | |
ef8f2327 MG |
484 | if (unlikely(lruvec->pgdat != pgdat)) |
485 | lruvec->pgdat = pgdat; | |
55779ec7 JW |
486 | return lruvec; |
487 | } | |
488 | ||
599d0c95 | 489 | struct lruvec *mem_cgroup_page_lruvec(struct page *, struct pglist_data *); |
c9b0ed51 | 490 | |
64219994 | 491 | struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
e993d905 | 492 | |
d46eb14b SB |
493 | struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm); |
494 | ||
f745c6f5 SB |
495 | struct mem_cgroup *get_mem_cgroup_from_page(struct page *page); |
496 | ||
33398cf2 MH |
497 | static inline |
498 | struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){ | |
499 | return css ? container_of(css, struct mem_cgroup, css) : NULL; | |
500 | } | |
501 | ||
bf4f0599 RG |
502 | static inline bool obj_cgroup_tryget(struct obj_cgroup *objcg) |
503 | { | |
504 | return percpu_ref_tryget(&objcg->refcnt); | |
505 | } | |
506 | ||
507 | static inline void obj_cgroup_get(struct obj_cgroup *objcg) | |
508 | { | |
509 | percpu_ref_get(&objcg->refcnt); | |
510 | } | |
511 | ||
512 | static inline void obj_cgroup_put(struct obj_cgroup *objcg) | |
513 | { | |
514 | percpu_ref_put(&objcg->refcnt); | |
515 | } | |
516 | ||
517 | /* | |
518 | * After the initialization objcg->memcg is always pointing at | |
519 | * a valid memcg, but can be atomically swapped to the parent memcg. | |
520 | * | |
521 | * The caller must ensure that the returned memcg won't be released: | |
522 | * e.g. acquire the rcu_read_lock or css_set_lock. | |
523 | */ | |
524 | static inline struct mem_cgroup *obj_cgroup_memcg(struct obj_cgroup *objcg) | |
525 | { | |
526 | return READ_ONCE(objcg->memcg); | |
527 | } | |
528 | ||
dc0b5864 RG |
529 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
530 | { | |
d46eb14b SB |
531 | if (memcg) |
532 | css_put(&memcg->css); | |
dc0b5864 RG |
533 | } |
534 | ||
8e8ae645 JW |
535 | #define mem_cgroup_from_counter(counter, member) \ |
536 | container_of(counter, struct mem_cgroup, member) | |
537 | ||
33398cf2 MH |
538 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
539 | struct mem_cgroup *, | |
540 | struct mem_cgroup_reclaim_cookie *); | |
541 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); | |
7c5f64f8 VD |
542 | int mem_cgroup_scan_tasks(struct mem_cgroup *, |
543 | int (*)(struct task_struct *, void *), void *); | |
33398cf2 | 544 | |
23047a96 JW |
545 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
546 | { | |
547 | if (mem_cgroup_disabled()) | |
548 | return 0; | |
549 | ||
73f576c0 | 550 | return memcg->id.id; |
23047a96 | 551 | } |
73f576c0 | 552 | struct mem_cgroup *mem_cgroup_from_id(unsigned short id); |
23047a96 | 553 | |
aa9694bb CD |
554 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
555 | { | |
556 | return mem_cgroup_from_css(seq_css(m)); | |
557 | } | |
558 | ||
2262185c RG |
559 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
560 | { | |
561 | struct mem_cgroup_per_node *mz; | |
562 | ||
563 | if (mem_cgroup_disabled()) | |
564 | return NULL; | |
565 | ||
566 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
567 | return mz->memcg; | |
568 | } | |
569 | ||
8e8ae645 JW |
570 | /** |
571 | * parent_mem_cgroup - find the accounting parent of a memcg | |
572 | * @memcg: memcg whose parent to find | |
573 | * | |
574 | * Returns the parent memcg, or NULL if this is the root or the memory | |
575 | * controller is in legacy no-hierarchy mode. | |
576 | */ | |
577 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) | |
578 | { | |
579 | if (!memcg->memory.parent) | |
580 | return NULL; | |
581 | return mem_cgroup_from_counter(memcg->memory.parent, memory); | |
582 | } | |
583 | ||
33398cf2 MH |
584 | static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, |
585 | struct mem_cgroup *root) | |
586 | { | |
587 | if (root == memcg) | |
588 | return true; | |
589 | if (!root->use_hierarchy) | |
590 | return false; | |
591 | return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup); | |
592 | } | |
e1aab161 | 593 | |
2314b42d JW |
594 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
595 | struct mem_cgroup *memcg) | |
2e4d4091 | 596 | { |
587af308 | 597 | struct mem_cgroup *task_memcg; |
413918bb | 598 | bool match = false; |
c3ac9a8a | 599 | |
2e4d4091 | 600 | rcu_read_lock(); |
587af308 | 601 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
413918bb | 602 | if (task_memcg) |
2314b42d | 603 | match = mem_cgroup_is_descendant(task_memcg, memcg); |
2e4d4091 | 604 | rcu_read_unlock(); |
c3ac9a8a | 605 | return match; |
2e4d4091 | 606 | } |
8a9f3ccd | 607 | |
64219994 | 608 | struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page); |
2fc04524 | 609 | ino_t page_cgroup_ino(struct page *page); |
d324236b | 610 | |
eb01aaab VD |
611 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
612 | { | |
613 | if (mem_cgroup_disabled()) | |
614 | return true; | |
615 | return !!(memcg->css.flags & CSS_ONLINE); | |
616 | } | |
617 | ||
58ae83db KH |
618 | /* |
619 | * For memory reclaim. | |
620 | */ | |
889976db | 621 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
33398cf2 MH |
622 | |
623 | void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, | |
b4536f0c | 624 | int zid, int nr_pages); |
33398cf2 | 625 | |
b4536f0c MH |
626 | static inline |
627 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
628 | enum lru_list lru, int zone_idx) | |
629 | { | |
630 | struct mem_cgroup_per_node *mz; | |
631 | ||
632 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
e0e3f42f | 633 | return READ_ONCE(mz->lru_zone_size[zone_idx][lru]); |
33398cf2 MH |
634 | } |
635 | ||
b23afb93 TH |
636 | void mem_cgroup_handle_over_high(void); |
637 | ||
bbec2e15 | 638 | unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg); |
7c5f64f8 | 639 | |
9783aa99 CD |
640 | unsigned long mem_cgroup_size(struct mem_cgroup *memcg); |
641 | ||
f0c867d9 | 642 | void mem_cgroup_print_oom_context(struct mem_cgroup *memcg, |
64219994 | 643 | struct task_struct *p); |
58ae83db | 644 | |
f0c867d9 | 645 | void mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg); |
646 | ||
29ef680a | 647 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 | 648 | { |
29ef680a MH |
649 | WARN_ON(current->in_user_fault); |
650 | current->in_user_fault = 1; | |
519e5247 JW |
651 | } |
652 | ||
29ef680a | 653 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 | 654 | { |
29ef680a MH |
655 | WARN_ON(!current->in_user_fault); |
656 | current->in_user_fault = 0; | |
519e5247 JW |
657 | } |
658 | ||
3812c8c8 JW |
659 | static inline bool task_in_memcg_oom(struct task_struct *p) |
660 | { | |
626ebc41 | 661 | return p->memcg_in_oom; |
3812c8c8 JW |
662 | } |
663 | ||
49426420 | 664 | bool mem_cgroup_oom_synchronize(bool wait); |
3d8b38eb RG |
665 | struct mem_cgroup *mem_cgroup_get_oom_group(struct task_struct *victim, |
666 | struct mem_cgroup *oom_domain); | |
667 | void mem_cgroup_print_oom_group(struct mem_cgroup *memcg); | |
3812c8c8 | 668 | |
c255a458 | 669 | #ifdef CONFIG_MEMCG_SWAP |
eccb52e7 | 670 | extern bool cgroup_memory_noswap; |
c077719b | 671 | #endif |
f8d66542 | 672 | |
739f79fc JW |
673 | struct mem_cgroup *lock_page_memcg(struct page *page); |
674 | void __unlock_page_memcg(struct mem_cgroup *memcg); | |
62cccb8c | 675 | void unlock_page_memcg(struct page *page); |
d7365e78 | 676 | |
42a30035 JW |
677 | /* |
678 | * idx can be of type enum memcg_stat_item or node_stat_item. | |
679 | * Keep in sync with memcg_exact_page_state(). | |
680 | */ | |
681 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx) | |
682 | { | |
683 | long x = atomic_long_read(&memcg->vmstats[idx]); | |
684 | #ifdef CONFIG_SMP | |
685 | if (x < 0) | |
686 | x = 0; | |
687 | #endif | |
688 | return x; | |
689 | } | |
690 | ||
0b3d6e6f GT |
691 | /* |
692 | * idx can be of type enum memcg_stat_item or node_stat_item. | |
693 | * Keep in sync with memcg_exact_page_state(). | |
694 | */ | |
205b20cc JW |
695 | static inline unsigned long memcg_page_state_local(struct mem_cgroup *memcg, |
696 | int idx) | |
2a2e4885 | 697 | { |
815744d7 JW |
698 | long x = 0; |
699 | int cpu; | |
700 | ||
701 | for_each_possible_cpu(cpu) | |
702 | x += per_cpu(memcg->vmstats_local->stat[idx], cpu); | |
a983b5eb JW |
703 | #ifdef CONFIG_SMP |
704 | if (x < 0) | |
705 | x = 0; | |
706 | #endif | |
707 | return x; | |
2a2e4885 JW |
708 | } |
709 | ||
db9adbcb | 710 | void __mod_memcg_state(struct mem_cgroup *memcg, int idx, int val); |
2a2e4885 | 711 | |
04fecbf5 | 712 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 713 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 714 | int idx, int val) |
2a2e4885 | 715 | { |
c3cc3911 JW |
716 | unsigned long flags; |
717 | ||
718 | local_irq_save(flags); | |
a983b5eb | 719 | __mod_memcg_state(memcg, idx, val); |
c3cc3911 | 720 | local_irq_restore(flags); |
2a2e4885 JW |
721 | } |
722 | ||
33398cf2 | 723 | /** |
ccda7f43 | 724 | * mod_memcg_page_state - update page state statistics |
62cccb8c | 725 | * @page: the page |
33398cf2 MH |
726 | * @idx: page state item to account |
727 | * @val: number of pages (positive or negative) | |
728 | * | |
fdf1cdb9 JW |
729 | * The @page must be locked or the caller must use lock_page_memcg() |
730 | * to prevent double accounting when the page is concurrently being | |
731 | * moved to another memcg: | |
81f8c3a4 | 732 | * |
fdf1cdb9 | 733 | * lock_page(page) or lock_page_memcg(page) |
81f8c3a4 | 734 | * if (TestClearPageState(page)) |
ccda7f43 | 735 | * mod_memcg_page_state(page, state, -1); |
fdf1cdb9 | 736 | * unlock_page(page) or unlock_page_memcg(page) |
2a2e4885 JW |
737 | * |
738 | * Kernel pages are an exception to this, since they'll never move. | |
33398cf2 | 739 | */ |
00f3ca2c | 740 | static inline void __mod_memcg_page_state(struct page *page, |
04fecbf5 | 741 | int idx, int val) |
00f3ca2c JW |
742 | { |
743 | if (page->mem_cgroup) | |
744 | __mod_memcg_state(page->mem_cgroup, idx, val); | |
745 | } | |
746 | ||
ccda7f43 | 747 | static inline void mod_memcg_page_state(struct page *page, |
04fecbf5 | 748 | int idx, int val) |
33398cf2 | 749 | { |
62cccb8c | 750 | if (page->mem_cgroup) |
ccda7f43 | 751 | mod_memcg_state(page->mem_cgroup, idx, val); |
33398cf2 MH |
752 | } |
753 | ||
42a30035 JW |
754 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
755 | enum node_stat_item idx) | |
756 | { | |
757 | struct mem_cgroup_per_node *pn; | |
758 | long x; | |
759 | ||
760 | if (mem_cgroup_disabled()) | |
761 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
762 | ||
763 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
764 | x = atomic_long_read(&pn->lruvec_stat[idx]); | |
765 | #ifdef CONFIG_SMP | |
766 | if (x < 0) | |
767 | x = 0; | |
768 | #endif | |
769 | return x; | |
770 | } | |
771 | ||
205b20cc JW |
772 | static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
773 | enum node_stat_item idx) | |
2a7106f2 | 774 | { |
00f3ca2c | 775 | struct mem_cgroup_per_node *pn; |
815744d7 JW |
776 | long x = 0; |
777 | int cpu; | |
00f3ca2c JW |
778 | |
779 | if (mem_cgroup_disabled()) | |
780 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
781 | ||
782 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
815744d7 JW |
783 | for_each_possible_cpu(cpu) |
784 | x += per_cpu(pn->lruvec_stat_local->count[idx], cpu); | |
a983b5eb JW |
785 | #ifdef CONFIG_SMP |
786 | if (x < 0) | |
787 | x = 0; | |
788 | #endif | |
789 | return x; | |
2a7106f2 GT |
790 | } |
791 | ||
eedc4e5a RG |
792 | void __mod_memcg_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx, |
793 | int val); | |
db9adbcb JW |
794 | void __mod_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx, |
795 | int val); | |
ec9f0238 | 796 | void __mod_lruvec_slab_state(void *p, enum node_stat_item idx, int val); |
991e7673 | 797 | |
8380ce47 | 798 | void mod_memcg_obj_state(void *p, int idx, int val); |
00f3ca2c | 799 | |
991e7673 SB |
800 | static inline void mod_lruvec_slab_state(void *p, enum node_stat_item idx, |
801 | int val) | |
802 | { | |
803 | unsigned long flags; | |
804 | ||
805 | local_irq_save(flags); | |
806 | __mod_lruvec_slab_state(p, idx, val); | |
807 | local_irq_restore(flags); | |
808 | } | |
809 | ||
eedc4e5a RG |
810 | static inline void mod_memcg_lruvec_state(struct lruvec *lruvec, |
811 | enum node_stat_item idx, int val) | |
812 | { | |
813 | unsigned long flags; | |
814 | ||
815 | local_irq_save(flags); | |
816 | __mod_memcg_lruvec_state(lruvec, idx, val); | |
817 | local_irq_restore(flags); | |
818 | } | |
819 | ||
00f3ca2c JW |
820 | static inline void mod_lruvec_state(struct lruvec *lruvec, |
821 | enum node_stat_item idx, int val) | |
822 | { | |
c3cc3911 JW |
823 | unsigned long flags; |
824 | ||
825 | local_irq_save(flags); | |
28454265 | 826 | __mod_lruvec_state(lruvec, idx, val); |
c3cc3911 | 827 | local_irq_restore(flags); |
00f3ca2c JW |
828 | } |
829 | ||
830 | static inline void __mod_lruvec_page_state(struct page *page, | |
831 | enum node_stat_item idx, int val) | |
832 | { | |
9da7b521 | 833 | struct page *head = compound_head(page); /* rmap on tail pages */ |
28454265 JW |
834 | pg_data_t *pgdat = page_pgdat(page); |
835 | struct lruvec *lruvec; | |
00f3ca2c | 836 | |
28454265 | 837 | /* Untracked pages have no memcg, no lruvec. Update only the node */ |
9da7b521 | 838 | if (!head->mem_cgroup) { |
28454265 | 839 | __mod_node_page_state(pgdat, idx, val); |
00f3ca2c | 840 | return; |
28454265 JW |
841 | } |
842 | ||
9da7b521 | 843 | lruvec = mem_cgroup_lruvec(head->mem_cgroup, pgdat); |
28454265 | 844 | __mod_lruvec_state(lruvec, idx, val); |
00f3ca2c JW |
845 | } |
846 | ||
847 | static inline void mod_lruvec_page_state(struct page *page, | |
848 | enum node_stat_item idx, int val) | |
849 | { | |
c3cc3911 JW |
850 | unsigned long flags; |
851 | ||
852 | local_irq_save(flags); | |
28454265 | 853 | __mod_lruvec_page_state(page, idx, val); |
c3cc3911 | 854 | local_irq_restore(flags); |
2a7106f2 GT |
855 | } |
856 | ||
ef8f2327 | 857 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
858 | gfp_t gfp_mask, |
859 | unsigned long *total_scanned); | |
a63d83f4 | 860 | |
db9adbcb JW |
861 | void __count_memcg_events(struct mem_cgroup *memcg, enum vm_event_item idx, |
862 | unsigned long count); | |
c9019e9b | 863 | |
2262185c | 864 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
e27be240 JW |
865 | enum vm_event_item idx, |
866 | unsigned long count) | |
2262185c | 867 | { |
c3cc3911 JW |
868 | unsigned long flags; |
869 | ||
870 | local_irq_save(flags); | |
a983b5eb | 871 | __count_memcg_events(memcg, idx, count); |
c3cc3911 | 872 | local_irq_restore(flags); |
2262185c RG |
873 | } |
874 | ||
875 | static inline void count_memcg_page_event(struct page *page, | |
e27be240 | 876 | enum vm_event_item idx) |
2262185c RG |
877 | { |
878 | if (page->mem_cgroup) | |
879 | count_memcg_events(page->mem_cgroup, idx, 1); | |
880 | } | |
881 | ||
882 | static inline void count_memcg_event_mm(struct mm_struct *mm, | |
883 | enum vm_event_item idx) | |
68ae564b | 884 | { |
33398cf2 MH |
885 | struct mem_cgroup *memcg; |
886 | ||
68ae564b DR |
887 | if (mem_cgroup_disabled()) |
888 | return; | |
33398cf2 MH |
889 | |
890 | rcu_read_lock(); | |
891 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
fe6bdfc8 | 892 | if (likely(memcg)) |
c9019e9b | 893 | count_memcg_events(memcg, idx, 1); |
33398cf2 | 894 | rcu_read_unlock(); |
68ae564b | 895 | } |
c9019e9b | 896 | |
e27be240 JW |
897 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
898 | enum memcg_memory_event event) | |
c9019e9b | 899 | { |
1e577f97 SB |
900 | atomic_long_inc(&memcg->memory_events_local[event]); |
901 | cgroup_file_notify(&memcg->events_local_file); | |
902 | ||
9852ae3f CD |
903 | do { |
904 | atomic_long_inc(&memcg->memory_events[event]); | |
905 | cgroup_file_notify(&memcg->events_file); | |
906 | ||
04fd61a4 YS |
907 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys)) |
908 | break; | |
9852ae3f CD |
909 | if (cgrp_dfl_root.flags & CGRP_ROOT_MEMORY_LOCAL_EVENTS) |
910 | break; | |
911 | } while ((memcg = parent_mem_cgroup(memcg)) && | |
912 | !mem_cgroup_is_root(memcg)); | |
c9019e9b JW |
913 | } |
914 | ||
fe6bdfc8 RG |
915 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
916 | enum memcg_memory_event event) | |
917 | { | |
918 | struct mem_cgroup *memcg; | |
919 | ||
920 | if (mem_cgroup_disabled()) | |
921 | return; | |
922 | ||
923 | rcu_read_lock(); | |
924 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
925 | if (likely(memcg)) | |
926 | memcg_memory_event(memcg, event); | |
927 | rcu_read_unlock(); | |
928 | } | |
929 | ||
ca3e0214 | 930 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
e94c8a9c | 931 | void mem_cgroup_split_huge_fixup(struct page *head); |
ca3e0214 KH |
932 | #endif |
933 | ||
c255a458 | 934 | #else /* CONFIG_MEMCG */ |
23047a96 JW |
935 | |
936 | #define MEM_CGROUP_ID_SHIFT 0 | |
937 | #define MEM_CGROUP_ID_MAX 0 | |
938 | ||
7a81b88c KH |
939 | struct mem_cgroup; |
940 | ||
dfd2f10c KT |
941 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
942 | { | |
943 | return true; | |
944 | } | |
945 | ||
23047a96 JW |
946 | static inline bool mem_cgroup_disabled(void) |
947 | { | |
948 | return true; | |
949 | } | |
950 | ||
e27be240 JW |
951 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
952 | enum memcg_memory_event event) | |
241994ed JW |
953 | { |
954 | } | |
955 | ||
fe6bdfc8 RG |
956 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
957 | enum memcg_memory_event event) | |
958 | { | |
959 | } | |
960 | ||
22f7496f YS |
961 | static inline unsigned long mem_cgroup_protection(struct mem_cgroup *root, |
962 | struct mem_cgroup *memcg, | |
1bc63fb1 | 963 | bool in_low_reclaim) |
9783aa99 | 964 | { |
1bc63fb1 | 965 | return 0; |
9783aa99 CD |
966 | } |
967 | ||
45c7f7e1 CD |
968 | static inline void mem_cgroup_calculate_protection(struct mem_cgroup *root, |
969 | struct mem_cgroup *memcg) | |
970 | { | |
971 | } | |
972 | ||
973 | static inline bool mem_cgroup_below_low(struct mem_cgroup *memcg) | |
974 | { | |
975 | return false; | |
976 | } | |
977 | ||
978 | static inline bool mem_cgroup_below_min(struct mem_cgroup *memcg) | |
241994ed | 979 | { |
45c7f7e1 | 980 | return false; |
241994ed JW |
981 | } |
982 | ||
3fea5a49 | 983 | static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm, |
d9eb1ea2 | 984 | gfp_t gfp_mask) |
3fea5a49 JW |
985 | { |
986 | return 0; | |
987 | } | |
988 | ||
0a31bc97 | 989 | static inline void mem_cgroup_uncharge(struct page *page) |
569b846d KH |
990 | { |
991 | } | |
992 | ||
747db954 | 993 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
8a9f3ccd BS |
994 | { |
995 | } | |
996 | ||
6a93ca8f | 997 | static inline void mem_cgroup_migrate(struct page *old, struct page *new) |
69029cd5 KH |
998 | { |
999 | } | |
1000 | ||
867e5e1d JW |
1001 | static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg, |
1002 | struct pglist_data *pgdat) | |
08e552c6 | 1003 | { |
867e5e1d | 1004 | return &pgdat->__lruvec; |
08e552c6 KH |
1005 | } |
1006 | ||
fa9add64 | 1007 | static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, |
599d0c95 | 1008 | struct pglist_data *pgdat) |
66e1707b | 1009 | { |
867e5e1d | 1010 | return &pgdat->__lruvec; |
66e1707b BS |
1011 | } |
1012 | ||
b910718a JW |
1013 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) |
1014 | { | |
1015 | return NULL; | |
1016 | } | |
1017 | ||
587af308 | 1018 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
c0ff4b85 | 1019 | struct mem_cgroup *memcg) |
bed7161a | 1020 | { |
587af308 | 1021 | return true; |
bed7161a BS |
1022 | } |
1023 | ||
d46eb14b SB |
1024 | static inline struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm) |
1025 | { | |
1026 | return NULL; | |
1027 | } | |
1028 | ||
f745c6f5 SB |
1029 | static inline struct mem_cgroup *get_mem_cgroup_from_page(struct page *page) |
1030 | { | |
1031 | return NULL; | |
1032 | } | |
1033 | ||
dc0b5864 RG |
1034 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
1035 | { | |
1036 | } | |
1037 | ||
5660048c JW |
1038 | static inline struct mem_cgroup * |
1039 | mem_cgroup_iter(struct mem_cgroup *root, | |
1040 | struct mem_cgroup *prev, | |
1041 | struct mem_cgroup_reclaim_cookie *reclaim) | |
1042 | { | |
1043 | return NULL; | |
1044 | } | |
1045 | ||
1046 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
1047 | struct mem_cgroup *prev) | |
1048 | { | |
1049 | } | |
1050 | ||
7c5f64f8 VD |
1051 | static inline int mem_cgroup_scan_tasks(struct mem_cgroup *memcg, |
1052 | int (*fn)(struct task_struct *, void *), void *arg) | |
1053 | { | |
1054 | return 0; | |
1055 | } | |
1056 | ||
23047a96 | 1057 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
f8d66542 | 1058 | { |
23047a96 JW |
1059 | return 0; |
1060 | } | |
1061 | ||
1062 | static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id) | |
1063 | { | |
1064 | WARN_ON_ONCE(id); | |
1065 | /* XXX: This should always return root_mem_cgroup */ | |
1066 | return NULL; | |
f8d66542 | 1067 | } |
a636b327 | 1068 | |
aa9694bb CD |
1069 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
1070 | { | |
1071 | return NULL; | |
1072 | } | |
1073 | ||
2262185c RG |
1074 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
1075 | { | |
1076 | return NULL; | |
1077 | } | |
1078 | ||
eb01aaab | 1079 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
14797e23 | 1080 | { |
13308ca9 | 1081 | return true; |
14797e23 KM |
1082 | } |
1083 | ||
b4536f0c MH |
1084 | static inline |
1085 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
1086 | enum lru_list lru, int zone_idx) | |
1087 | { | |
1088 | return 0; | |
1089 | } | |
a3d8e054 | 1090 | |
bbec2e15 | 1091 | static inline unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg) |
7c5f64f8 VD |
1092 | { |
1093 | return 0; | |
1094 | } | |
1095 | ||
9783aa99 CD |
1096 | static inline unsigned long mem_cgroup_size(struct mem_cgroup *memcg) |
1097 | { | |
1098 | return 0; | |
1099 | } | |
1100 | ||
e222432b | 1101 | static inline void |
f0c867d9 | 1102 | mem_cgroup_print_oom_context(struct mem_cgroup *memcg, struct task_struct *p) |
1103 | { | |
1104 | } | |
1105 | ||
1106 | static inline void | |
1107 | mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg) | |
e222432b BS |
1108 | { |
1109 | } | |
1110 | ||
739f79fc JW |
1111 | static inline struct mem_cgroup *lock_page_memcg(struct page *page) |
1112 | { | |
1113 | return NULL; | |
1114 | } | |
1115 | ||
1116 | static inline void __unlock_page_memcg(struct mem_cgroup *memcg) | |
89c06bd5 KH |
1117 | { |
1118 | } | |
1119 | ||
62cccb8c | 1120 | static inline void unlock_page_memcg(struct page *page) |
89c06bd5 KH |
1121 | { |
1122 | } | |
1123 | ||
b23afb93 TH |
1124 | static inline void mem_cgroup_handle_over_high(void) |
1125 | { | |
1126 | } | |
1127 | ||
29ef680a | 1128 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 JW |
1129 | { |
1130 | } | |
1131 | ||
29ef680a | 1132 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 JW |
1133 | { |
1134 | } | |
1135 | ||
3812c8c8 JW |
1136 | static inline bool task_in_memcg_oom(struct task_struct *p) |
1137 | { | |
1138 | return false; | |
1139 | } | |
1140 | ||
49426420 | 1141 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
3812c8c8 JW |
1142 | { |
1143 | return false; | |
1144 | } | |
1145 | ||
3d8b38eb RG |
1146 | static inline struct mem_cgroup *mem_cgroup_get_oom_group( |
1147 | struct task_struct *victim, struct mem_cgroup *oom_domain) | |
1148 | { | |
1149 | return NULL; | |
1150 | } | |
1151 | ||
1152 | static inline void mem_cgroup_print_oom_group(struct mem_cgroup *memcg) | |
1153 | { | |
1154 | } | |
1155 | ||
42a30035 JW |
1156 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx) |
1157 | { | |
1158 | return 0; | |
1159 | } | |
1160 | ||
205b20cc JW |
1161 | static inline unsigned long memcg_page_state_local(struct mem_cgroup *memcg, |
1162 | int idx) | |
2a2e4885 JW |
1163 | { |
1164 | return 0; | |
1165 | } | |
1166 | ||
00f3ca2c | 1167 | static inline void __mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1168 | int idx, |
00f3ca2c | 1169 | int nr) |
2a2e4885 JW |
1170 | { |
1171 | } | |
1172 | ||
00f3ca2c | 1173 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1174 | int idx, |
00f3ca2c | 1175 | int nr) |
2a2e4885 JW |
1176 | { |
1177 | } | |
1178 | ||
00f3ca2c | 1179 | static inline void __mod_memcg_page_state(struct page *page, |
04fecbf5 | 1180 | int idx, |
00f3ca2c | 1181 | int nr) |
2a2e4885 JW |
1182 | { |
1183 | } | |
1184 | ||
ccda7f43 | 1185 | static inline void mod_memcg_page_state(struct page *page, |
04fecbf5 | 1186 | int idx, |
ccda7f43 | 1187 | int nr) |
553af430 JW |
1188 | { |
1189 | } | |
1190 | ||
42a30035 JW |
1191 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
1192 | enum node_stat_item idx) | |
1193 | { | |
1194 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
1195 | } | |
1196 | ||
205b20cc JW |
1197 | static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
1198 | enum node_stat_item idx) | |
2a7106f2 | 1199 | { |
00f3ca2c | 1200 | return node_page_state(lruvec_pgdat(lruvec), idx); |
2a7106f2 GT |
1201 | } |
1202 | ||
eedc4e5a RG |
1203 | static inline void __mod_memcg_lruvec_state(struct lruvec *lruvec, |
1204 | enum node_stat_item idx, int val) | |
1205 | { | |
1206 | } | |
1207 | ||
00f3ca2c JW |
1208 | static inline void __mod_lruvec_state(struct lruvec *lruvec, |
1209 | enum node_stat_item idx, int val) | |
d69b042f | 1210 | { |
00f3ca2c JW |
1211 | __mod_node_page_state(lruvec_pgdat(lruvec), idx, val); |
1212 | } | |
1213 | ||
1214 | static inline void mod_lruvec_state(struct lruvec *lruvec, | |
1215 | enum node_stat_item idx, int val) | |
1216 | { | |
1217 | mod_node_page_state(lruvec_pgdat(lruvec), idx, val); | |
1218 | } | |
1219 | ||
1220 | static inline void __mod_lruvec_page_state(struct page *page, | |
1221 | enum node_stat_item idx, int val) | |
1222 | { | |
1223 | __mod_node_page_state(page_pgdat(page), idx, val); | |
1224 | } | |
1225 | ||
1226 | static inline void mod_lruvec_page_state(struct page *page, | |
1227 | enum node_stat_item idx, int val) | |
1228 | { | |
1229 | mod_node_page_state(page_pgdat(page), idx, val); | |
d69b042f BS |
1230 | } |
1231 | ||
ec9f0238 RG |
1232 | static inline void __mod_lruvec_slab_state(void *p, enum node_stat_item idx, |
1233 | int val) | |
1234 | { | |
1235 | struct page *page = virt_to_head_page(p); | |
1236 | ||
1237 | __mod_node_page_state(page_pgdat(page), idx, val); | |
1238 | } | |
1239 | ||
991e7673 SB |
1240 | static inline void mod_lruvec_slab_state(void *p, enum node_stat_item idx, |
1241 | int val) | |
1242 | { | |
1243 | struct page *page = virt_to_head_page(p); | |
1244 | ||
1245 | mod_node_page_state(page_pgdat(page), idx, val); | |
1246 | } | |
1247 | ||
8380ce47 RG |
1248 | static inline void mod_memcg_obj_state(void *p, int idx, int val) |
1249 | { | |
1250 | } | |
1251 | ||
4e416953 | 1252 | static inline |
ef8f2327 | 1253 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
1254 | gfp_t gfp_mask, |
1255 | unsigned long *total_scanned) | |
4e416953 | 1256 | { |
0608f43d | 1257 | return 0; |
4e416953 BS |
1258 | } |
1259 | ||
e94c8a9c | 1260 | static inline void mem_cgroup_split_huge_fixup(struct page *head) |
ca3e0214 KH |
1261 | { |
1262 | } | |
1263 | ||
2262185c RG |
1264 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
1265 | enum vm_event_item idx, | |
1266 | unsigned long count) | |
1267 | { | |
1268 | } | |
1269 | ||
9851ac13 KT |
1270 | static inline void __count_memcg_events(struct mem_cgroup *memcg, |
1271 | enum vm_event_item idx, | |
1272 | unsigned long count) | |
1273 | { | |
1274 | } | |
1275 | ||
2262185c | 1276 | static inline void count_memcg_page_event(struct page *page, |
04fecbf5 | 1277 | int idx) |
2262185c RG |
1278 | { |
1279 | } | |
1280 | ||
456f998e | 1281 | static inline |
2262185c | 1282 | void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx) |
456f998e YH |
1283 | { |
1284 | } | |
c255a458 | 1285 | #endif /* CONFIG_MEMCG */ |
78fb7466 | 1286 | |
04fecbf5 | 1287 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1288 | static inline void __inc_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1289 | int idx) |
00f3ca2c JW |
1290 | { |
1291 | __mod_memcg_state(memcg, idx, 1); | |
1292 | } | |
1293 | ||
04fecbf5 | 1294 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1295 | static inline void __dec_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1296 | int idx) |
00f3ca2c JW |
1297 | { |
1298 | __mod_memcg_state(memcg, idx, -1); | |
1299 | } | |
1300 | ||
04fecbf5 | 1301 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1302 | static inline void __inc_memcg_page_state(struct page *page, |
04fecbf5 | 1303 | int idx) |
00f3ca2c JW |
1304 | { |
1305 | __mod_memcg_page_state(page, idx, 1); | |
1306 | } | |
1307 | ||
04fecbf5 | 1308 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1309 | static inline void __dec_memcg_page_state(struct page *page, |
04fecbf5 | 1310 | int idx) |
00f3ca2c JW |
1311 | { |
1312 | __mod_memcg_page_state(page, idx, -1); | |
1313 | } | |
1314 | ||
1315 | static inline void __inc_lruvec_state(struct lruvec *lruvec, | |
1316 | enum node_stat_item idx) | |
1317 | { | |
1318 | __mod_lruvec_state(lruvec, idx, 1); | |
1319 | } | |
1320 | ||
1321 | static inline void __dec_lruvec_state(struct lruvec *lruvec, | |
1322 | enum node_stat_item idx) | |
1323 | { | |
1324 | __mod_lruvec_state(lruvec, idx, -1); | |
1325 | } | |
1326 | ||
1327 | static inline void __inc_lruvec_page_state(struct page *page, | |
1328 | enum node_stat_item idx) | |
1329 | { | |
1330 | __mod_lruvec_page_state(page, idx, 1); | |
1331 | } | |
1332 | ||
1333 | static inline void __dec_lruvec_page_state(struct page *page, | |
1334 | enum node_stat_item idx) | |
1335 | { | |
1336 | __mod_lruvec_page_state(page, idx, -1); | |
1337 | } | |
1338 | ||
ec9f0238 RG |
1339 | static inline void __inc_lruvec_slab_state(void *p, enum node_stat_item idx) |
1340 | { | |
1341 | __mod_lruvec_slab_state(p, idx, 1); | |
1342 | } | |
1343 | ||
1344 | static inline void __dec_lruvec_slab_state(void *p, enum node_stat_item idx) | |
1345 | { | |
1346 | __mod_lruvec_slab_state(p, idx, -1); | |
1347 | } | |
1348 | ||
04fecbf5 | 1349 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1350 | static inline void inc_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1351 | int idx) |
00f3ca2c JW |
1352 | { |
1353 | mod_memcg_state(memcg, idx, 1); | |
1354 | } | |
1355 | ||
04fecbf5 | 1356 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1357 | static inline void dec_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1358 | int idx) |
00f3ca2c JW |
1359 | { |
1360 | mod_memcg_state(memcg, idx, -1); | |
1361 | } | |
1362 | ||
04fecbf5 | 1363 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1364 | static inline void inc_memcg_page_state(struct page *page, |
04fecbf5 | 1365 | int idx) |
00f3ca2c JW |
1366 | { |
1367 | mod_memcg_page_state(page, idx, 1); | |
1368 | } | |
1369 | ||
04fecbf5 | 1370 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1371 | static inline void dec_memcg_page_state(struct page *page, |
04fecbf5 | 1372 | int idx) |
00f3ca2c JW |
1373 | { |
1374 | mod_memcg_page_state(page, idx, -1); | |
1375 | } | |
1376 | ||
1377 | static inline void inc_lruvec_state(struct lruvec *lruvec, | |
1378 | enum node_stat_item idx) | |
1379 | { | |
1380 | mod_lruvec_state(lruvec, idx, 1); | |
1381 | } | |
1382 | ||
1383 | static inline void dec_lruvec_state(struct lruvec *lruvec, | |
1384 | enum node_stat_item idx) | |
1385 | { | |
1386 | mod_lruvec_state(lruvec, idx, -1); | |
1387 | } | |
1388 | ||
1389 | static inline void inc_lruvec_page_state(struct page *page, | |
1390 | enum node_stat_item idx) | |
1391 | { | |
1392 | mod_lruvec_page_state(page, idx, 1); | |
1393 | } | |
1394 | ||
1395 | static inline void dec_lruvec_page_state(struct page *page, | |
1396 | enum node_stat_item idx) | |
1397 | { | |
1398 | mod_lruvec_page_state(page, idx, -1); | |
1399 | } | |
1400 | ||
7cf111bc JW |
1401 | static inline struct lruvec *parent_lruvec(struct lruvec *lruvec) |
1402 | { | |
1403 | struct mem_cgroup *memcg; | |
1404 | ||
1405 | memcg = lruvec_memcg(lruvec); | |
1406 | if (!memcg) | |
1407 | return NULL; | |
1408 | memcg = parent_mem_cgroup(memcg); | |
1409 | if (!memcg) | |
1410 | return NULL; | |
1411 | return mem_cgroup_lruvec(memcg, lruvec_pgdat(lruvec)); | |
1412 | } | |
1413 | ||
52ebea74 | 1414 | #ifdef CONFIG_CGROUP_WRITEBACK |
841710aa | 1415 | |
841710aa | 1416 | struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb); |
c5edf9cd TH |
1417 | void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages, |
1418 | unsigned long *pheadroom, unsigned long *pdirty, | |
1419 | unsigned long *pwriteback); | |
841710aa | 1420 | |
97b27821 TH |
1421 | void mem_cgroup_track_foreign_dirty_slowpath(struct page *page, |
1422 | struct bdi_writeback *wb); | |
1423 | ||
1424 | static inline void mem_cgroup_track_foreign_dirty(struct page *page, | |
1425 | struct bdi_writeback *wb) | |
1426 | { | |
08d1d0e6 BH |
1427 | if (mem_cgroup_disabled()) |
1428 | return; | |
1429 | ||
97b27821 TH |
1430 | if (unlikely(&page->mem_cgroup->css != wb->memcg_css)) |
1431 | mem_cgroup_track_foreign_dirty_slowpath(page, wb); | |
1432 | } | |
1433 | ||
1434 | void mem_cgroup_flush_foreign(struct bdi_writeback *wb); | |
1435 | ||
841710aa TH |
1436 | #else /* CONFIG_CGROUP_WRITEBACK */ |
1437 | ||
1438 | static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb) | |
1439 | { | |
1440 | return NULL; | |
1441 | } | |
1442 | ||
c2aa723a | 1443 | static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb, |
c5edf9cd TH |
1444 | unsigned long *pfilepages, |
1445 | unsigned long *pheadroom, | |
c2aa723a TH |
1446 | unsigned long *pdirty, |
1447 | unsigned long *pwriteback) | |
1448 | { | |
1449 | } | |
1450 | ||
97b27821 TH |
1451 | static inline void mem_cgroup_track_foreign_dirty(struct page *page, |
1452 | struct bdi_writeback *wb) | |
1453 | { | |
1454 | } | |
1455 | ||
1456 | static inline void mem_cgroup_flush_foreign(struct bdi_writeback *wb) | |
1457 | { | |
1458 | } | |
1459 | ||
841710aa | 1460 | #endif /* CONFIG_CGROUP_WRITEBACK */ |
52ebea74 | 1461 | |
e1aab161 | 1462 | struct sock; |
baac50bb JW |
1463 | bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); |
1464 | void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); | |
d886f4e4 | 1465 | #ifdef CONFIG_MEMCG |
ef12947c JW |
1466 | extern struct static_key_false memcg_sockets_enabled_key; |
1467 | #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key) | |
2d758073 JW |
1468 | void mem_cgroup_sk_alloc(struct sock *sk); |
1469 | void mem_cgroup_sk_free(struct sock *sk); | |
baac50bb | 1470 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c | 1471 | { |
0db15298 | 1472 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && memcg->tcpmem_pressure) |
8e8ae645 | 1473 | return true; |
8e8ae645 JW |
1474 | do { |
1475 | if (time_before(jiffies, memcg->socket_pressure)) | |
1476 | return true; | |
1477 | } while ((memcg = parent_mem_cgroup(memcg))); | |
1478 | return false; | |
e805605c | 1479 | } |
0a432dcb YS |
1480 | |
1481 | extern int memcg_expand_shrinker_maps(int new_id); | |
1482 | ||
1483 | extern void memcg_set_shrinker_bit(struct mem_cgroup *memcg, | |
1484 | int nid, int shrinker_id); | |
e805605c | 1485 | #else |
80e95fe0 | 1486 | #define mem_cgroup_sockets_enabled 0 |
2d758073 JW |
1487 | static inline void mem_cgroup_sk_alloc(struct sock *sk) { }; |
1488 | static inline void mem_cgroup_sk_free(struct sock *sk) { }; | |
baac50bb | 1489 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c JW |
1490 | { |
1491 | return false; | |
1492 | } | |
0a432dcb YS |
1493 | |
1494 | static inline void memcg_set_shrinker_bit(struct mem_cgroup *memcg, | |
1495 | int nid, int shrinker_id) | |
1496 | { | |
1497 | } | |
e805605c | 1498 | #endif |
7ae1e1d0 | 1499 | |
9b6f7e16 | 1500 | #ifdef CONFIG_MEMCG_KMEM |
4b13f64d RG |
1501 | int __memcg_kmem_charge(struct mem_cgroup *memcg, gfp_t gfp, |
1502 | unsigned int nr_pages); | |
1503 | void __memcg_kmem_uncharge(struct mem_cgroup *memcg, unsigned int nr_pages); | |
f4b00eab RG |
1504 | int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, int order); |
1505 | void __memcg_kmem_uncharge_page(struct page *page, int order); | |
45264778 | 1506 | |
bf4f0599 RG |
1507 | struct obj_cgroup *get_obj_cgroup_from_current(void); |
1508 | ||
1509 | int obj_cgroup_charge(struct obj_cgroup *objcg, gfp_t gfp, size_t size); | |
1510 | void obj_cgroup_uncharge(struct obj_cgroup *objcg, size_t size); | |
1511 | ||
ef12947c | 1512 | extern struct static_key_false memcg_kmem_enabled_key; |
749c5415 | 1513 | |
dbcf73e2 | 1514 | extern int memcg_nr_cache_ids; |
64219994 MH |
1515 | void memcg_get_cache_ids(void); |
1516 | void memcg_put_cache_ids(void); | |
ebe945c2 GC |
1517 | |
1518 | /* | |
1519 | * Helper macro to loop through all memcg-specific caches. Callers must still | |
1520 | * check if the cache is valid (it is either valid or NULL). | |
1521 | * the slab_mutex must be held when looping through those caches | |
1522 | */ | |
749c5415 | 1523 | #define for_each_memcg_cache_index(_idx) \ |
dbcf73e2 | 1524 | for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++) |
749c5415 | 1525 | |
7ae1e1d0 GC |
1526 | static inline bool memcg_kmem_enabled(void) |
1527 | { | |
eda330e5 | 1528 | return static_branch_likely(&memcg_kmem_enabled_key); |
7ae1e1d0 GC |
1529 | } |
1530 | ||
0f876e4d RG |
1531 | static inline bool memcg_kmem_bypass(void) |
1532 | { | |
1533 | if (in_interrupt()) | |
1534 | return true; | |
1535 | ||
1536 | /* Allow remote memcg charging in kthread contexts. */ | |
1537 | if ((!current->mm || (current->flags & PF_KTHREAD)) && | |
1538 | !current->active_memcg) | |
1539 | return true; | |
1540 | return false; | |
1541 | } | |
1542 | ||
f4b00eab RG |
1543 | static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1544 | int order) | |
60cd4bcd SB |
1545 | { |
1546 | if (memcg_kmem_enabled()) | |
f4b00eab | 1547 | return __memcg_kmem_charge_page(page, gfp, order); |
60cd4bcd SB |
1548 | return 0; |
1549 | } | |
1550 | ||
f4b00eab | 1551 | static inline void memcg_kmem_uncharge_page(struct page *page, int order) |
60cd4bcd SB |
1552 | { |
1553 | if (memcg_kmem_enabled()) | |
f4b00eab | 1554 | __memcg_kmem_uncharge_page(page, order); |
60cd4bcd SB |
1555 | } |
1556 | ||
4b13f64d RG |
1557 | static inline int memcg_kmem_charge(struct mem_cgroup *memcg, gfp_t gfp, |
1558 | unsigned int nr_pages) | |
60cd4bcd SB |
1559 | { |
1560 | if (memcg_kmem_enabled()) | |
4b13f64d | 1561 | return __memcg_kmem_charge(memcg, gfp, nr_pages); |
60cd4bcd SB |
1562 | return 0; |
1563 | } | |
49a18eae | 1564 | |
4b13f64d RG |
1565 | static inline void memcg_kmem_uncharge(struct mem_cgroup *memcg, |
1566 | unsigned int nr_pages) | |
49a18eae RG |
1567 | { |
1568 | if (memcg_kmem_enabled()) | |
4b13f64d | 1569 | __memcg_kmem_uncharge(memcg, nr_pages); |
49a18eae RG |
1570 | } |
1571 | ||
33398cf2 | 1572 | /* |
9f706d68 | 1573 | * helper for accessing a memcg's index. It will be used as an index in the |
33398cf2 MH |
1574 | * child cache array in kmem_cache, and also to derive its name. This function |
1575 | * will return -1 when this is not a kmem-limited memcg. | |
1576 | */ | |
1577 | static inline int memcg_cache_id(struct mem_cgroup *memcg) | |
1578 | { | |
1579 | return memcg ? memcg->kmemcg_id : -1; | |
1580 | } | |
5722d094 | 1581 | |
8380ce47 RG |
1582 | struct mem_cgroup *mem_cgroup_from_obj(void *p); |
1583 | ||
7ae1e1d0 | 1584 | #else |
9b6f7e16 | 1585 | |
f4b00eab RG |
1586 | static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1587 | int order) | |
9b6f7e16 RG |
1588 | { |
1589 | return 0; | |
1590 | } | |
1591 | ||
f4b00eab | 1592 | static inline void memcg_kmem_uncharge_page(struct page *page, int order) |
9b6f7e16 RG |
1593 | { |
1594 | } | |
1595 | ||
f4b00eab RG |
1596 | static inline int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1597 | int order) | |
60cd4bcd SB |
1598 | { |
1599 | return 0; | |
1600 | } | |
1601 | ||
f4b00eab | 1602 | static inline void __memcg_kmem_uncharge_page(struct page *page, int order) |
60cd4bcd SB |
1603 | { |
1604 | } | |
1605 | ||
749c5415 GC |
1606 | #define for_each_memcg_cache_index(_idx) \ |
1607 | for (; NULL; ) | |
1608 | ||
b9ce5ef4 GC |
1609 | static inline bool memcg_kmem_enabled(void) |
1610 | { | |
1611 | return false; | |
1612 | } | |
1613 | ||
2633d7a0 GC |
1614 | static inline int memcg_cache_id(struct mem_cgroup *memcg) |
1615 | { | |
1616 | return -1; | |
1617 | } | |
1618 | ||
05257a1a VD |
1619 | static inline void memcg_get_cache_ids(void) |
1620 | { | |
1621 | } | |
1622 | ||
1623 | static inline void memcg_put_cache_ids(void) | |
1624 | { | |
1625 | } | |
1626 | ||
8380ce47 RG |
1627 | static inline struct mem_cgroup *mem_cgroup_from_obj(void *p) |
1628 | { | |
1629 | return NULL; | |
1630 | } | |
1631 | ||
84c07d11 | 1632 | #endif /* CONFIG_MEMCG_KMEM */ |
127424c8 | 1633 | |
8cdea7c0 | 1634 | #endif /* _LINUX_MEMCONTROL_H */ |