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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 | 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 | 217 | /* Accounted resources */ |
bd0b230f WL |
218 | struct page_counter memory; /* Both v1 & v2 */ |
219 | ||
220 | union { | |
221 | struct page_counter swap; /* v2 only */ | |
222 | struct page_counter memsw; /* v1 only */ | |
223 | }; | |
0db15298 JW |
224 | |
225 | /* Legacy consumer-oriented counters */ | |
bd0b230f WL |
226 | struct page_counter kmem; /* v1 only */ |
227 | struct page_counter tcpmem; /* v1 only */ | |
33398cf2 | 228 | |
f7e1cb6e JW |
229 | /* Range enforcement for interrupt charges */ |
230 | struct work_struct high_work; | |
231 | ||
33398cf2 MH |
232 | unsigned long soft_limit; |
233 | ||
234 | /* vmpressure notifications */ | |
235 | struct vmpressure vmpressure; | |
236 | ||
33398cf2 MH |
237 | /* |
238 | * Should the accounting and control be hierarchical, per subtree? | |
239 | */ | |
240 | bool use_hierarchy; | |
241 | ||
3d8b38eb RG |
242 | /* |
243 | * Should the OOM killer kill all belonging tasks, had it kill one? | |
244 | */ | |
245 | bool oom_group; | |
246 | ||
33398cf2 MH |
247 | /* protected by memcg_oom_lock */ |
248 | bool oom_lock; | |
249 | int under_oom; | |
250 | ||
251 | int swappiness; | |
252 | /* OOM-Killer disable */ | |
253 | int oom_kill_disable; | |
254 | ||
1e577f97 | 255 | /* memory.events and memory.events.local */ |
472912a2 | 256 | struct cgroup_file events_file; |
1e577f97 | 257 | struct cgroup_file events_local_file; |
472912a2 | 258 | |
f3a53a3a TH |
259 | /* handle for "memory.swap.events" */ |
260 | struct cgroup_file swap_events_file; | |
261 | ||
33398cf2 MH |
262 | /* protect arrays of thresholds */ |
263 | struct mutex thresholds_lock; | |
264 | ||
265 | /* thresholds for memory usage. RCU-protected */ | |
266 | struct mem_cgroup_thresholds thresholds; | |
267 | ||
268 | /* thresholds for mem+swap usage. RCU-protected */ | |
269 | struct mem_cgroup_thresholds memsw_thresholds; | |
270 | ||
271 | /* For oom notifier event fd */ | |
272 | struct list_head oom_notify; | |
273 | ||
274 | /* | |
275 | * Should we move charges of a task when a task is moved into this | |
276 | * mem_cgroup ? And what type of charges should we move ? | |
277 | */ | |
278 | unsigned long move_charge_at_immigrate; | |
e81bf979 AL |
279 | /* taken only while moving_account > 0 */ |
280 | spinlock_t move_lock; | |
281 | unsigned long move_lock_flags; | |
282 | ||
283 | MEMCG_PADDING(_pad1_); | |
284 | ||
33398cf2 MH |
285 | /* |
286 | * set > 0 if pages under this cgroup are moving to other cgroup. | |
287 | */ | |
288 | atomic_t moving_account; | |
33398cf2 | 289 | struct task_struct *move_lock_task; |
a983b5eb | 290 | |
815744d7 JW |
291 | /* Legacy local VM stats and events */ |
292 | struct memcg_vmstats_percpu __percpu *vmstats_local; | |
293 | ||
294 | /* Subtree VM stats and events (batched updates) */ | |
871789d4 | 295 | struct memcg_vmstats_percpu __percpu *vmstats_percpu; |
e81bf979 AL |
296 | |
297 | MEMCG_PADDING(_pad2_); | |
298 | ||
871789d4 CD |
299 | atomic_long_t vmstats[MEMCG_NR_STAT]; |
300 | atomic_long_t vmevents[NR_VM_EVENT_ITEMS]; | |
42a30035 | 301 | |
815744d7 | 302 | /* memory.events */ |
42a30035 | 303 | atomic_long_t memory_events[MEMCG_NR_MEMORY_EVENTS]; |
1e577f97 | 304 | atomic_long_t memory_events_local[MEMCG_NR_MEMORY_EVENTS]; |
33398cf2 | 305 | |
d886f4e4 JW |
306 | unsigned long socket_pressure; |
307 | ||
308 | /* Legacy tcp memory accounting */ | |
0db15298 JW |
309 | bool tcpmem_active; |
310 | int tcpmem_pressure; | |
d886f4e4 | 311 | |
84c07d11 | 312 | #ifdef CONFIG_MEMCG_KMEM |
33398cf2 MH |
313 | /* Index in the kmem_cache->memcg_params.memcg_caches array */ |
314 | int kmemcg_id; | |
567e9ab2 | 315 | enum memcg_kmem_state kmem_state; |
bf4f0599 RG |
316 | struct obj_cgroup __rcu *objcg; |
317 | struct list_head objcg_list; /* list of inherited objcgs */ | |
33398cf2 MH |
318 | #endif |
319 | ||
33398cf2 MH |
320 | #ifdef CONFIG_CGROUP_WRITEBACK |
321 | struct list_head cgwb_list; | |
322 | struct wb_domain cgwb_domain; | |
97b27821 | 323 | struct memcg_cgwb_frn cgwb_frn[MEMCG_CGWB_FRN_CNT]; |
33398cf2 MH |
324 | #endif |
325 | ||
326 | /* List of events which userspace want to receive */ | |
327 | struct list_head event_list; | |
328 | spinlock_t event_list_lock; | |
329 | ||
87eaceb3 YS |
330 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
331 | struct deferred_split deferred_split_queue; | |
332 | #endif | |
333 | ||
33398cf2 MH |
334 | struct mem_cgroup_per_node *nodeinfo[0]; |
335 | /* WARNING: nodeinfo must be the last member here */ | |
336 | }; | |
7d828602 | 337 | |
a983b5eb JW |
338 | /* |
339 | * size of first charge trial. "32" comes from vmscan.c's magic value. | |
340 | * TODO: maybe necessary to use big numbers in big irons. | |
341 | */ | |
342 | #define MEMCG_CHARGE_BATCH 32U | |
343 | ||
7d828602 | 344 | extern struct mem_cgroup *root_mem_cgroup; |
56161634 | 345 | |
772616b0 RG |
346 | static __always_inline bool memcg_stat_item_in_bytes(int idx) |
347 | { | |
348 | if (idx == MEMCG_PERCPU_B) | |
349 | return true; | |
350 | return vmstat_item_in_bytes(idx); | |
351 | } | |
352 | ||
dfd2f10c KT |
353 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
354 | { | |
355 | return (memcg == root_mem_cgroup); | |
356 | } | |
357 | ||
23047a96 JW |
358 | static inline bool mem_cgroup_disabled(void) |
359 | { | |
360 | return !cgroup_subsys_enabled(memory_cgrp_subsys); | |
361 | } | |
362 | ||
22f7496f YS |
363 | static inline unsigned long mem_cgroup_protection(struct mem_cgroup *root, |
364 | struct mem_cgroup *memcg, | |
1bc63fb1 | 365 | bool in_low_reclaim) |
9783aa99 | 366 | { |
1bc63fb1 CD |
367 | if (mem_cgroup_disabled()) |
368 | return 0; | |
369 | ||
22f7496f YS |
370 | /* |
371 | * There is no reclaim protection applied to a targeted reclaim. | |
372 | * We are special casing this specific case here because | |
373 | * mem_cgroup_protected calculation is not robust enough to keep | |
374 | * the protection invariant for calculated effective values for | |
375 | * parallel reclaimers with different reclaim target. This is | |
376 | * especially a problem for tail memcgs (as they have pages on LRU) | |
377 | * which would want to have effective values 0 for targeted reclaim | |
378 | * but a different value for external reclaim. | |
379 | * | |
380 | * Example | |
381 | * Let's have global and A's reclaim in parallel: | |
382 | * | | |
383 | * A (low=2G, usage = 3G, max = 3G, children_low_usage = 1.5G) | |
384 | * |\ | |
385 | * | C (low = 1G, usage = 2.5G) | |
386 | * B (low = 1G, usage = 0.5G) | |
387 | * | |
388 | * For the global reclaim | |
389 | * A.elow = A.low | |
390 | * B.elow = min(B.usage, B.low) because children_low_usage <= A.elow | |
391 | * C.elow = min(C.usage, C.low) | |
392 | * | |
393 | * With the effective values resetting we have A reclaim | |
394 | * A.elow = 0 | |
395 | * B.elow = B.low | |
396 | * C.elow = C.low | |
397 | * | |
398 | * If the global reclaim races with A's reclaim then | |
399 | * B.elow = C.elow = 0 because children_low_usage > A.elow) | |
400 | * is possible and reclaiming B would be violating the protection. | |
401 | * | |
402 | */ | |
403 | if (root == memcg) | |
404 | return 0; | |
405 | ||
1bc63fb1 CD |
406 | if (in_low_reclaim) |
407 | return READ_ONCE(memcg->memory.emin); | |
9783aa99 | 408 | |
1bc63fb1 CD |
409 | return max(READ_ONCE(memcg->memory.emin), |
410 | READ_ONCE(memcg->memory.elow)); | |
9783aa99 CD |
411 | } |
412 | ||
45c7f7e1 CD |
413 | void mem_cgroup_calculate_protection(struct mem_cgroup *root, |
414 | struct mem_cgroup *memcg); | |
415 | ||
416 | static inline bool mem_cgroup_supports_protection(struct mem_cgroup *memcg) | |
417 | { | |
418 | /* | |
419 | * The root memcg doesn't account charges, and doesn't support | |
420 | * protection. | |
421 | */ | |
422 | return !mem_cgroup_disabled() && !mem_cgroup_is_root(memcg); | |
423 | ||
424 | } | |
425 | ||
426 | static inline bool mem_cgroup_below_low(struct mem_cgroup *memcg) | |
427 | { | |
428 | if (!mem_cgroup_supports_protection(memcg)) | |
429 | return false; | |
430 | ||
431 | return READ_ONCE(memcg->memory.elow) >= | |
432 | page_counter_read(&memcg->memory); | |
433 | } | |
434 | ||
435 | static inline bool mem_cgroup_below_min(struct mem_cgroup *memcg) | |
436 | { | |
437 | if (!mem_cgroup_supports_protection(memcg)) | |
438 | return false; | |
439 | ||
440 | return READ_ONCE(memcg->memory.emin) >= | |
441 | page_counter_read(&memcg->memory); | |
442 | } | |
241994ed | 443 | |
d9eb1ea2 | 444 | int mem_cgroup_charge(struct page *page, struct mm_struct *mm, gfp_t gfp_mask); |
3fea5a49 | 445 | |
0a31bc97 | 446 | void mem_cgroup_uncharge(struct page *page); |
747db954 | 447 | void mem_cgroup_uncharge_list(struct list_head *page_list); |
569b846d | 448 | |
6a93ca8f | 449 | void mem_cgroup_migrate(struct page *oldpage, struct page *newpage); |
569b846d | 450 | |
ef8f2327 MG |
451 | static struct mem_cgroup_per_node * |
452 | mem_cgroup_nodeinfo(struct mem_cgroup *memcg, int nid) | |
55779ec7 | 453 | { |
ef8f2327 | 454 | return memcg->nodeinfo[nid]; |
55779ec7 JW |
455 | } |
456 | ||
457 | /** | |
867e5e1d | 458 | * mem_cgroup_lruvec - get the lru list vector for a memcg & node |
55779ec7 JW |
459 | * @memcg: memcg of the wanted lruvec |
460 | * | |
867e5e1d JW |
461 | * Returns the lru list vector holding pages for a given @memcg & |
462 | * @node combination. This can be the node lruvec, if the memory | |
463 | * controller is disabled. | |
55779ec7 | 464 | */ |
867e5e1d JW |
465 | static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg, |
466 | struct pglist_data *pgdat) | |
55779ec7 | 467 | { |
ef8f2327 | 468 | struct mem_cgroup_per_node *mz; |
55779ec7 JW |
469 | struct lruvec *lruvec; |
470 | ||
471 | if (mem_cgroup_disabled()) { | |
867e5e1d | 472 | lruvec = &pgdat->__lruvec; |
55779ec7 JW |
473 | goto out; |
474 | } | |
475 | ||
1b05117d JW |
476 | if (!memcg) |
477 | memcg = root_mem_cgroup; | |
478 | ||
ef8f2327 | 479 | mz = mem_cgroup_nodeinfo(memcg, pgdat->node_id); |
55779ec7 JW |
480 | lruvec = &mz->lruvec; |
481 | out: | |
482 | /* | |
483 | * Since a node can be onlined after the mem_cgroup was created, | |
599d0c95 | 484 | * we have to be prepared to initialize lruvec->pgdat here; |
55779ec7 JW |
485 | * and if offlined then reonlined, we need to reinitialize it. |
486 | */ | |
ef8f2327 MG |
487 | if (unlikely(lruvec->pgdat != pgdat)) |
488 | lruvec->pgdat = pgdat; | |
55779ec7 JW |
489 | return lruvec; |
490 | } | |
491 | ||
599d0c95 | 492 | struct lruvec *mem_cgroup_page_lruvec(struct page *, struct pglist_data *); |
c9b0ed51 | 493 | |
64219994 | 494 | struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
e993d905 | 495 | |
d46eb14b SB |
496 | struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm); |
497 | ||
f745c6f5 SB |
498 | struct mem_cgroup *get_mem_cgroup_from_page(struct page *page); |
499 | ||
33398cf2 MH |
500 | static inline |
501 | struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){ | |
502 | return css ? container_of(css, struct mem_cgroup, css) : NULL; | |
503 | } | |
504 | ||
bf4f0599 RG |
505 | static inline bool obj_cgroup_tryget(struct obj_cgroup *objcg) |
506 | { | |
507 | return percpu_ref_tryget(&objcg->refcnt); | |
508 | } | |
509 | ||
510 | static inline void obj_cgroup_get(struct obj_cgroup *objcg) | |
511 | { | |
512 | percpu_ref_get(&objcg->refcnt); | |
513 | } | |
514 | ||
515 | static inline void obj_cgroup_put(struct obj_cgroup *objcg) | |
516 | { | |
517 | percpu_ref_put(&objcg->refcnt); | |
518 | } | |
519 | ||
520 | /* | |
521 | * After the initialization objcg->memcg is always pointing at | |
522 | * a valid memcg, but can be atomically swapped to the parent memcg. | |
523 | * | |
524 | * The caller must ensure that the returned memcg won't be released: | |
525 | * e.g. acquire the rcu_read_lock or css_set_lock. | |
526 | */ | |
527 | static inline struct mem_cgroup *obj_cgroup_memcg(struct obj_cgroup *objcg) | |
528 | { | |
529 | return READ_ONCE(objcg->memcg); | |
530 | } | |
531 | ||
dc0b5864 RG |
532 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
533 | { | |
d46eb14b SB |
534 | if (memcg) |
535 | css_put(&memcg->css); | |
dc0b5864 RG |
536 | } |
537 | ||
8e8ae645 JW |
538 | #define mem_cgroup_from_counter(counter, member) \ |
539 | container_of(counter, struct mem_cgroup, member) | |
540 | ||
33398cf2 MH |
541 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
542 | struct mem_cgroup *, | |
543 | struct mem_cgroup_reclaim_cookie *); | |
544 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); | |
7c5f64f8 VD |
545 | int mem_cgroup_scan_tasks(struct mem_cgroup *, |
546 | int (*)(struct task_struct *, void *), void *); | |
33398cf2 | 547 | |
23047a96 JW |
548 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
549 | { | |
550 | if (mem_cgroup_disabled()) | |
551 | return 0; | |
552 | ||
73f576c0 | 553 | return memcg->id.id; |
23047a96 | 554 | } |
73f576c0 | 555 | struct mem_cgroup *mem_cgroup_from_id(unsigned short id); |
23047a96 | 556 | |
aa9694bb CD |
557 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
558 | { | |
559 | return mem_cgroup_from_css(seq_css(m)); | |
560 | } | |
561 | ||
2262185c RG |
562 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
563 | { | |
564 | struct mem_cgroup_per_node *mz; | |
565 | ||
566 | if (mem_cgroup_disabled()) | |
567 | return NULL; | |
568 | ||
569 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
570 | return mz->memcg; | |
571 | } | |
572 | ||
8e8ae645 JW |
573 | /** |
574 | * parent_mem_cgroup - find the accounting parent of a memcg | |
575 | * @memcg: memcg whose parent to find | |
576 | * | |
577 | * Returns the parent memcg, or NULL if this is the root or the memory | |
578 | * controller is in legacy no-hierarchy mode. | |
579 | */ | |
580 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) | |
581 | { | |
582 | if (!memcg->memory.parent) | |
583 | return NULL; | |
584 | return mem_cgroup_from_counter(memcg->memory.parent, memory); | |
585 | } | |
586 | ||
33398cf2 MH |
587 | static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, |
588 | struct mem_cgroup *root) | |
589 | { | |
590 | if (root == memcg) | |
591 | return true; | |
592 | if (!root->use_hierarchy) | |
593 | return false; | |
594 | return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup); | |
595 | } | |
e1aab161 | 596 | |
2314b42d JW |
597 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
598 | struct mem_cgroup *memcg) | |
2e4d4091 | 599 | { |
587af308 | 600 | struct mem_cgroup *task_memcg; |
413918bb | 601 | bool match = false; |
c3ac9a8a | 602 | |
2e4d4091 | 603 | rcu_read_lock(); |
587af308 | 604 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
413918bb | 605 | if (task_memcg) |
2314b42d | 606 | match = mem_cgroup_is_descendant(task_memcg, memcg); |
2e4d4091 | 607 | rcu_read_unlock(); |
c3ac9a8a | 608 | return match; |
2e4d4091 | 609 | } |
8a9f3ccd | 610 | |
64219994 | 611 | struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page); |
2fc04524 | 612 | ino_t page_cgroup_ino(struct page *page); |
d324236b | 613 | |
eb01aaab VD |
614 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
615 | { | |
616 | if (mem_cgroup_disabled()) | |
617 | return true; | |
618 | return !!(memcg->css.flags & CSS_ONLINE); | |
619 | } | |
620 | ||
58ae83db KH |
621 | /* |
622 | * For memory reclaim. | |
623 | */ | |
889976db | 624 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
33398cf2 MH |
625 | |
626 | void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, | |
b4536f0c | 627 | int zid, int nr_pages); |
33398cf2 | 628 | |
b4536f0c MH |
629 | static inline |
630 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
631 | enum lru_list lru, int zone_idx) | |
632 | { | |
633 | struct mem_cgroup_per_node *mz; | |
634 | ||
635 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
e0e3f42f | 636 | return READ_ONCE(mz->lru_zone_size[zone_idx][lru]); |
33398cf2 MH |
637 | } |
638 | ||
b23afb93 TH |
639 | void mem_cgroup_handle_over_high(void); |
640 | ||
bbec2e15 | 641 | unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg); |
7c5f64f8 | 642 | |
9783aa99 CD |
643 | unsigned long mem_cgroup_size(struct mem_cgroup *memcg); |
644 | ||
f0c867d9 | 645 | void mem_cgroup_print_oom_context(struct mem_cgroup *memcg, |
64219994 | 646 | struct task_struct *p); |
58ae83db | 647 | |
f0c867d9 | 648 | void mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg); |
649 | ||
29ef680a | 650 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 | 651 | { |
29ef680a MH |
652 | WARN_ON(current->in_user_fault); |
653 | current->in_user_fault = 1; | |
519e5247 JW |
654 | } |
655 | ||
29ef680a | 656 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 | 657 | { |
29ef680a MH |
658 | WARN_ON(!current->in_user_fault); |
659 | current->in_user_fault = 0; | |
519e5247 JW |
660 | } |
661 | ||
3812c8c8 JW |
662 | static inline bool task_in_memcg_oom(struct task_struct *p) |
663 | { | |
626ebc41 | 664 | return p->memcg_in_oom; |
3812c8c8 JW |
665 | } |
666 | ||
49426420 | 667 | bool mem_cgroup_oom_synchronize(bool wait); |
3d8b38eb RG |
668 | struct mem_cgroup *mem_cgroup_get_oom_group(struct task_struct *victim, |
669 | struct mem_cgroup *oom_domain); | |
670 | void mem_cgroup_print_oom_group(struct mem_cgroup *memcg); | |
3812c8c8 | 671 | |
c255a458 | 672 | #ifdef CONFIG_MEMCG_SWAP |
eccb52e7 | 673 | extern bool cgroup_memory_noswap; |
c077719b | 674 | #endif |
f8d66542 | 675 | |
739f79fc JW |
676 | struct mem_cgroup *lock_page_memcg(struct page *page); |
677 | void __unlock_page_memcg(struct mem_cgroup *memcg); | |
62cccb8c | 678 | void unlock_page_memcg(struct page *page); |
d7365e78 | 679 | |
42a30035 JW |
680 | /* |
681 | * idx can be of type enum memcg_stat_item or node_stat_item. | |
682 | * Keep in sync with memcg_exact_page_state(). | |
683 | */ | |
684 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx) | |
685 | { | |
686 | long x = atomic_long_read(&memcg->vmstats[idx]); | |
687 | #ifdef CONFIG_SMP | |
688 | if (x < 0) | |
689 | x = 0; | |
690 | #endif | |
691 | return x; | |
692 | } | |
693 | ||
0b3d6e6f GT |
694 | /* |
695 | * idx can be of type enum memcg_stat_item or node_stat_item. | |
696 | * Keep in sync with memcg_exact_page_state(). | |
697 | */ | |
205b20cc JW |
698 | static inline unsigned long memcg_page_state_local(struct mem_cgroup *memcg, |
699 | int idx) | |
2a2e4885 | 700 | { |
815744d7 JW |
701 | long x = 0; |
702 | int cpu; | |
703 | ||
704 | for_each_possible_cpu(cpu) | |
705 | x += per_cpu(memcg->vmstats_local->stat[idx], cpu); | |
a983b5eb JW |
706 | #ifdef CONFIG_SMP |
707 | if (x < 0) | |
708 | x = 0; | |
709 | #endif | |
710 | return x; | |
2a2e4885 JW |
711 | } |
712 | ||
db9adbcb | 713 | void __mod_memcg_state(struct mem_cgroup *memcg, int idx, int val); |
2a2e4885 | 714 | |
04fecbf5 | 715 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 716 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 717 | int idx, int val) |
2a2e4885 | 718 | { |
c3cc3911 JW |
719 | unsigned long flags; |
720 | ||
721 | local_irq_save(flags); | |
a983b5eb | 722 | __mod_memcg_state(memcg, idx, val); |
c3cc3911 | 723 | local_irq_restore(flags); |
2a2e4885 JW |
724 | } |
725 | ||
33398cf2 | 726 | /** |
ccda7f43 | 727 | * mod_memcg_page_state - update page state statistics |
62cccb8c | 728 | * @page: the page |
33398cf2 MH |
729 | * @idx: page state item to account |
730 | * @val: number of pages (positive or negative) | |
731 | * | |
fdf1cdb9 JW |
732 | * The @page must be locked or the caller must use lock_page_memcg() |
733 | * to prevent double accounting when the page is concurrently being | |
734 | * moved to another memcg: | |
81f8c3a4 | 735 | * |
fdf1cdb9 | 736 | * lock_page(page) or lock_page_memcg(page) |
81f8c3a4 | 737 | * if (TestClearPageState(page)) |
ccda7f43 | 738 | * mod_memcg_page_state(page, state, -1); |
fdf1cdb9 | 739 | * unlock_page(page) or unlock_page_memcg(page) |
2a2e4885 JW |
740 | * |
741 | * Kernel pages are an exception to this, since they'll never move. | |
33398cf2 | 742 | */ |
00f3ca2c | 743 | static inline void __mod_memcg_page_state(struct page *page, |
04fecbf5 | 744 | int idx, int val) |
00f3ca2c JW |
745 | { |
746 | if (page->mem_cgroup) | |
747 | __mod_memcg_state(page->mem_cgroup, idx, val); | |
748 | } | |
749 | ||
ccda7f43 | 750 | static inline void mod_memcg_page_state(struct page *page, |
04fecbf5 | 751 | int idx, int val) |
33398cf2 | 752 | { |
62cccb8c | 753 | if (page->mem_cgroup) |
ccda7f43 | 754 | mod_memcg_state(page->mem_cgroup, idx, val); |
33398cf2 MH |
755 | } |
756 | ||
42a30035 JW |
757 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
758 | enum node_stat_item idx) | |
759 | { | |
760 | struct mem_cgroup_per_node *pn; | |
761 | long x; | |
762 | ||
763 | if (mem_cgroup_disabled()) | |
764 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
765 | ||
766 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
767 | x = atomic_long_read(&pn->lruvec_stat[idx]); | |
768 | #ifdef CONFIG_SMP | |
769 | if (x < 0) | |
770 | x = 0; | |
771 | #endif | |
772 | return x; | |
773 | } | |
774 | ||
205b20cc JW |
775 | static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
776 | enum node_stat_item idx) | |
2a7106f2 | 777 | { |
00f3ca2c | 778 | struct mem_cgroup_per_node *pn; |
815744d7 JW |
779 | long x = 0; |
780 | int cpu; | |
00f3ca2c JW |
781 | |
782 | if (mem_cgroup_disabled()) | |
783 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
784 | ||
785 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
815744d7 JW |
786 | for_each_possible_cpu(cpu) |
787 | x += per_cpu(pn->lruvec_stat_local->count[idx], cpu); | |
a983b5eb JW |
788 | #ifdef CONFIG_SMP |
789 | if (x < 0) | |
790 | x = 0; | |
791 | #endif | |
792 | return x; | |
2a7106f2 GT |
793 | } |
794 | ||
eedc4e5a RG |
795 | void __mod_memcg_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx, |
796 | int val); | |
db9adbcb JW |
797 | void __mod_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx, |
798 | int val); | |
ec9f0238 | 799 | void __mod_lruvec_slab_state(void *p, enum node_stat_item idx, int val); |
991e7673 | 800 | |
8380ce47 | 801 | void mod_memcg_obj_state(void *p, int idx, int val); |
00f3ca2c | 802 | |
991e7673 SB |
803 | static inline void mod_lruvec_slab_state(void *p, enum node_stat_item idx, |
804 | int val) | |
805 | { | |
806 | unsigned long flags; | |
807 | ||
808 | local_irq_save(flags); | |
809 | __mod_lruvec_slab_state(p, idx, val); | |
810 | local_irq_restore(flags); | |
811 | } | |
812 | ||
eedc4e5a RG |
813 | static inline void mod_memcg_lruvec_state(struct lruvec *lruvec, |
814 | enum node_stat_item idx, int val) | |
815 | { | |
816 | unsigned long flags; | |
817 | ||
818 | local_irq_save(flags); | |
819 | __mod_memcg_lruvec_state(lruvec, idx, val); | |
820 | local_irq_restore(flags); | |
821 | } | |
822 | ||
00f3ca2c JW |
823 | static inline void mod_lruvec_state(struct lruvec *lruvec, |
824 | enum node_stat_item idx, int val) | |
825 | { | |
c3cc3911 JW |
826 | unsigned long flags; |
827 | ||
828 | local_irq_save(flags); | |
28454265 | 829 | __mod_lruvec_state(lruvec, idx, val); |
c3cc3911 | 830 | local_irq_restore(flags); |
00f3ca2c JW |
831 | } |
832 | ||
833 | static inline void __mod_lruvec_page_state(struct page *page, | |
834 | enum node_stat_item idx, int val) | |
835 | { | |
9da7b521 | 836 | struct page *head = compound_head(page); /* rmap on tail pages */ |
28454265 JW |
837 | pg_data_t *pgdat = page_pgdat(page); |
838 | struct lruvec *lruvec; | |
00f3ca2c | 839 | |
28454265 | 840 | /* Untracked pages have no memcg, no lruvec. Update only the node */ |
9da7b521 | 841 | if (!head->mem_cgroup) { |
28454265 | 842 | __mod_node_page_state(pgdat, idx, val); |
00f3ca2c | 843 | return; |
28454265 JW |
844 | } |
845 | ||
9da7b521 | 846 | lruvec = mem_cgroup_lruvec(head->mem_cgroup, pgdat); |
28454265 | 847 | __mod_lruvec_state(lruvec, idx, val); |
00f3ca2c JW |
848 | } |
849 | ||
850 | static inline void mod_lruvec_page_state(struct page *page, | |
851 | enum node_stat_item idx, int val) | |
852 | { | |
c3cc3911 JW |
853 | unsigned long flags; |
854 | ||
855 | local_irq_save(flags); | |
28454265 | 856 | __mod_lruvec_page_state(page, idx, val); |
c3cc3911 | 857 | local_irq_restore(flags); |
2a7106f2 GT |
858 | } |
859 | ||
ef8f2327 | 860 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
861 | gfp_t gfp_mask, |
862 | unsigned long *total_scanned); | |
a63d83f4 | 863 | |
db9adbcb JW |
864 | void __count_memcg_events(struct mem_cgroup *memcg, enum vm_event_item idx, |
865 | unsigned long count); | |
c9019e9b | 866 | |
2262185c | 867 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
e27be240 JW |
868 | enum vm_event_item idx, |
869 | unsigned long count) | |
2262185c | 870 | { |
c3cc3911 JW |
871 | unsigned long flags; |
872 | ||
873 | local_irq_save(flags); | |
a983b5eb | 874 | __count_memcg_events(memcg, idx, count); |
c3cc3911 | 875 | local_irq_restore(flags); |
2262185c RG |
876 | } |
877 | ||
878 | static inline void count_memcg_page_event(struct page *page, | |
e27be240 | 879 | enum vm_event_item idx) |
2262185c RG |
880 | { |
881 | if (page->mem_cgroup) | |
882 | count_memcg_events(page->mem_cgroup, idx, 1); | |
883 | } | |
884 | ||
885 | static inline void count_memcg_event_mm(struct mm_struct *mm, | |
886 | enum vm_event_item idx) | |
68ae564b | 887 | { |
33398cf2 MH |
888 | struct mem_cgroup *memcg; |
889 | ||
68ae564b DR |
890 | if (mem_cgroup_disabled()) |
891 | return; | |
33398cf2 MH |
892 | |
893 | rcu_read_lock(); | |
894 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
fe6bdfc8 | 895 | if (likely(memcg)) |
c9019e9b | 896 | count_memcg_events(memcg, idx, 1); |
33398cf2 | 897 | rcu_read_unlock(); |
68ae564b | 898 | } |
c9019e9b | 899 | |
e27be240 JW |
900 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
901 | enum memcg_memory_event event) | |
c9019e9b | 902 | { |
1e577f97 SB |
903 | atomic_long_inc(&memcg->memory_events_local[event]); |
904 | cgroup_file_notify(&memcg->events_local_file); | |
905 | ||
9852ae3f CD |
906 | do { |
907 | atomic_long_inc(&memcg->memory_events[event]); | |
908 | cgroup_file_notify(&memcg->events_file); | |
909 | ||
04fd61a4 YS |
910 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys)) |
911 | break; | |
9852ae3f CD |
912 | if (cgrp_dfl_root.flags & CGRP_ROOT_MEMORY_LOCAL_EVENTS) |
913 | break; | |
914 | } while ((memcg = parent_mem_cgroup(memcg)) && | |
915 | !mem_cgroup_is_root(memcg)); | |
c9019e9b JW |
916 | } |
917 | ||
fe6bdfc8 RG |
918 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
919 | enum memcg_memory_event event) | |
920 | { | |
921 | struct mem_cgroup *memcg; | |
922 | ||
923 | if (mem_cgroup_disabled()) | |
924 | return; | |
925 | ||
926 | rcu_read_lock(); | |
927 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
928 | if (likely(memcg)) | |
929 | memcg_memory_event(memcg, event); | |
930 | rcu_read_unlock(); | |
931 | } | |
932 | ||
ca3e0214 | 933 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
e94c8a9c | 934 | void mem_cgroup_split_huge_fixup(struct page *head); |
ca3e0214 KH |
935 | #endif |
936 | ||
c255a458 | 937 | #else /* CONFIG_MEMCG */ |
23047a96 JW |
938 | |
939 | #define MEM_CGROUP_ID_SHIFT 0 | |
940 | #define MEM_CGROUP_ID_MAX 0 | |
941 | ||
7a81b88c KH |
942 | struct mem_cgroup; |
943 | ||
dfd2f10c KT |
944 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
945 | { | |
946 | return true; | |
947 | } | |
948 | ||
23047a96 JW |
949 | static inline bool mem_cgroup_disabled(void) |
950 | { | |
951 | return true; | |
952 | } | |
953 | ||
e27be240 JW |
954 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
955 | enum memcg_memory_event event) | |
241994ed JW |
956 | { |
957 | } | |
958 | ||
fe6bdfc8 RG |
959 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
960 | enum memcg_memory_event event) | |
961 | { | |
962 | } | |
963 | ||
22f7496f YS |
964 | static inline unsigned long mem_cgroup_protection(struct mem_cgroup *root, |
965 | struct mem_cgroup *memcg, | |
1bc63fb1 | 966 | bool in_low_reclaim) |
9783aa99 | 967 | { |
1bc63fb1 | 968 | return 0; |
9783aa99 CD |
969 | } |
970 | ||
45c7f7e1 CD |
971 | static inline void mem_cgroup_calculate_protection(struct mem_cgroup *root, |
972 | struct mem_cgroup *memcg) | |
973 | { | |
974 | } | |
975 | ||
976 | static inline bool mem_cgroup_below_low(struct mem_cgroup *memcg) | |
977 | { | |
978 | return false; | |
979 | } | |
980 | ||
981 | static inline bool mem_cgroup_below_min(struct mem_cgroup *memcg) | |
241994ed | 982 | { |
45c7f7e1 | 983 | return false; |
241994ed JW |
984 | } |
985 | ||
3fea5a49 | 986 | static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm, |
d9eb1ea2 | 987 | gfp_t gfp_mask) |
3fea5a49 JW |
988 | { |
989 | return 0; | |
990 | } | |
991 | ||
0a31bc97 | 992 | static inline void mem_cgroup_uncharge(struct page *page) |
569b846d KH |
993 | { |
994 | } | |
995 | ||
747db954 | 996 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
8a9f3ccd BS |
997 | { |
998 | } | |
999 | ||
6a93ca8f | 1000 | static inline void mem_cgroup_migrate(struct page *old, struct page *new) |
69029cd5 KH |
1001 | { |
1002 | } | |
1003 | ||
867e5e1d JW |
1004 | static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg, |
1005 | struct pglist_data *pgdat) | |
08e552c6 | 1006 | { |
867e5e1d | 1007 | return &pgdat->__lruvec; |
08e552c6 KH |
1008 | } |
1009 | ||
fa9add64 | 1010 | static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, |
599d0c95 | 1011 | struct pglist_data *pgdat) |
66e1707b | 1012 | { |
867e5e1d | 1013 | return &pgdat->__lruvec; |
66e1707b BS |
1014 | } |
1015 | ||
b910718a JW |
1016 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) |
1017 | { | |
1018 | return NULL; | |
1019 | } | |
1020 | ||
587af308 | 1021 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
c0ff4b85 | 1022 | struct mem_cgroup *memcg) |
bed7161a | 1023 | { |
587af308 | 1024 | return true; |
bed7161a BS |
1025 | } |
1026 | ||
d46eb14b SB |
1027 | static inline struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm) |
1028 | { | |
1029 | return NULL; | |
1030 | } | |
1031 | ||
f745c6f5 SB |
1032 | static inline struct mem_cgroup *get_mem_cgroup_from_page(struct page *page) |
1033 | { | |
1034 | return NULL; | |
1035 | } | |
1036 | ||
dc0b5864 RG |
1037 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
1038 | { | |
1039 | } | |
1040 | ||
5660048c JW |
1041 | static inline struct mem_cgroup * |
1042 | mem_cgroup_iter(struct mem_cgroup *root, | |
1043 | struct mem_cgroup *prev, | |
1044 | struct mem_cgroup_reclaim_cookie *reclaim) | |
1045 | { | |
1046 | return NULL; | |
1047 | } | |
1048 | ||
1049 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
1050 | struct mem_cgroup *prev) | |
1051 | { | |
1052 | } | |
1053 | ||
7c5f64f8 VD |
1054 | static inline int mem_cgroup_scan_tasks(struct mem_cgroup *memcg, |
1055 | int (*fn)(struct task_struct *, void *), void *arg) | |
1056 | { | |
1057 | return 0; | |
1058 | } | |
1059 | ||
23047a96 | 1060 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
f8d66542 | 1061 | { |
23047a96 JW |
1062 | return 0; |
1063 | } | |
1064 | ||
1065 | static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id) | |
1066 | { | |
1067 | WARN_ON_ONCE(id); | |
1068 | /* XXX: This should always return root_mem_cgroup */ | |
1069 | return NULL; | |
f8d66542 | 1070 | } |
a636b327 | 1071 | |
aa9694bb CD |
1072 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
1073 | { | |
1074 | return NULL; | |
1075 | } | |
1076 | ||
2262185c RG |
1077 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
1078 | { | |
1079 | return NULL; | |
1080 | } | |
1081 | ||
eb01aaab | 1082 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
14797e23 | 1083 | { |
13308ca9 | 1084 | return true; |
14797e23 KM |
1085 | } |
1086 | ||
b4536f0c MH |
1087 | static inline |
1088 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
1089 | enum lru_list lru, int zone_idx) | |
1090 | { | |
1091 | return 0; | |
1092 | } | |
a3d8e054 | 1093 | |
bbec2e15 | 1094 | static inline unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg) |
7c5f64f8 VD |
1095 | { |
1096 | return 0; | |
1097 | } | |
1098 | ||
9783aa99 CD |
1099 | static inline unsigned long mem_cgroup_size(struct mem_cgroup *memcg) |
1100 | { | |
1101 | return 0; | |
1102 | } | |
1103 | ||
e222432b | 1104 | static inline void |
f0c867d9 | 1105 | mem_cgroup_print_oom_context(struct mem_cgroup *memcg, struct task_struct *p) |
1106 | { | |
1107 | } | |
1108 | ||
1109 | static inline void | |
1110 | mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg) | |
e222432b BS |
1111 | { |
1112 | } | |
1113 | ||
739f79fc JW |
1114 | static inline struct mem_cgroup *lock_page_memcg(struct page *page) |
1115 | { | |
1116 | return NULL; | |
1117 | } | |
1118 | ||
1119 | static inline void __unlock_page_memcg(struct mem_cgroup *memcg) | |
89c06bd5 KH |
1120 | { |
1121 | } | |
1122 | ||
62cccb8c | 1123 | static inline void unlock_page_memcg(struct page *page) |
89c06bd5 KH |
1124 | { |
1125 | } | |
1126 | ||
b23afb93 TH |
1127 | static inline void mem_cgroup_handle_over_high(void) |
1128 | { | |
1129 | } | |
1130 | ||
29ef680a | 1131 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 JW |
1132 | { |
1133 | } | |
1134 | ||
29ef680a | 1135 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 JW |
1136 | { |
1137 | } | |
1138 | ||
3812c8c8 JW |
1139 | static inline bool task_in_memcg_oom(struct task_struct *p) |
1140 | { | |
1141 | return false; | |
1142 | } | |
1143 | ||
49426420 | 1144 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
3812c8c8 JW |
1145 | { |
1146 | return false; | |
1147 | } | |
1148 | ||
3d8b38eb RG |
1149 | static inline struct mem_cgroup *mem_cgroup_get_oom_group( |
1150 | struct task_struct *victim, struct mem_cgroup *oom_domain) | |
1151 | { | |
1152 | return NULL; | |
1153 | } | |
1154 | ||
1155 | static inline void mem_cgroup_print_oom_group(struct mem_cgroup *memcg) | |
1156 | { | |
1157 | } | |
1158 | ||
42a30035 JW |
1159 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx) |
1160 | { | |
1161 | return 0; | |
1162 | } | |
1163 | ||
205b20cc JW |
1164 | static inline unsigned long memcg_page_state_local(struct mem_cgroup *memcg, |
1165 | int idx) | |
2a2e4885 JW |
1166 | { |
1167 | return 0; | |
1168 | } | |
1169 | ||
00f3ca2c | 1170 | static inline void __mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1171 | int idx, |
00f3ca2c | 1172 | int nr) |
2a2e4885 JW |
1173 | { |
1174 | } | |
1175 | ||
00f3ca2c | 1176 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1177 | int idx, |
00f3ca2c | 1178 | int nr) |
2a2e4885 JW |
1179 | { |
1180 | } | |
1181 | ||
00f3ca2c | 1182 | static inline void __mod_memcg_page_state(struct page *page, |
04fecbf5 | 1183 | int idx, |
00f3ca2c | 1184 | int nr) |
2a2e4885 JW |
1185 | { |
1186 | } | |
1187 | ||
ccda7f43 | 1188 | static inline void mod_memcg_page_state(struct page *page, |
04fecbf5 | 1189 | int idx, |
ccda7f43 | 1190 | int nr) |
553af430 JW |
1191 | { |
1192 | } | |
1193 | ||
42a30035 JW |
1194 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
1195 | enum node_stat_item idx) | |
1196 | { | |
1197 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
1198 | } | |
1199 | ||
205b20cc JW |
1200 | static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
1201 | enum node_stat_item idx) | |
2a7106f2 | 1202 | { |
00f3ca2c | 1203 | return node_page_state(lruvec_pgdat(lruvec), idx); |
2a7106f2 GT |
1204 | } |
1205 | ||
eedc4e5a RG |
1206 | static inline void __mod_memcg_lruvec_state(struct lruvec *lruvec, |
1207 | enum node_stat_item idx, int val) | |
1208 | { | |
1209 | } | |
1210 | ||
00f3ca2c JW |
1211 | static inline void __mod_lruvec_state(struct lruvec *lruvec, |
1212 | enum node_stat_item idx, int val) | |
d69b042f | 1213 | { |
00f3ca2c JW |
1214 | __mod_node_page_state(lruvec_pgdat(lruvec), idx, val); |
1215 | } | |
1216 | ||
1217 | static inline void mod_lruvec_state(struct lruvec *lruvec, | |
1218 | enum node_stat_item idx, int val) | |
1219 | { | |
1220 | mod_node_page_state(lruvec_pgdat(lruvec), idx, val); | |
1221 | } | |
1222 | ||
1223 | static inline void __mod_lruvec_page_state(struct page *page, | |
1224 | enum node_stat_item idx, int val) | |
1225 | { | |
1226 | __mod_node_page_state(page_pgdat(page), idx, val); | |
1227 | } | |
1228 | ||
1229 | static inline void mod_lruvec_page_state(struct page *page, | |
1230 | enum node_stat_item idx, int val) | |
1231 | { | |
1232 | mod_node_page_state(page_pgdat(page), idx, val); | |
d69b042f BS |
1233 | } |
1234 | ||
ec9f0238 RG |
1235 | static inline void __mod_lruvec_slab_state(void *p, enum node_stat_item idx, |
1236 | int val) | |
1237 | { | |
1238 | struct page *page = virt_to_head_page(p); | |
1239 | ||
1240 | __mod_node_page_state(page_pgdat(page), idx, val); | |
1241 | } | |
1242 | ||
991e7673 SB |
1243 | static inline void mod_lruvec_slab_state(void *p, enum node_stat_item idx, |
1244 | int val) | |
1245 | { | |
1246 | struct page *page = virt_to_head_page(p); | |
1247 | ||
1248 | mod_node_page_state(page_pgdat(page), idx, val); | |
1249 | } | |
1250 | ||
8380ce47 RG |
1251 | static inline void mod_memcg_obj_state(void *p, int idx, int val) |
1252 | { | |
1253 | } | |
1254 | ||
4e416953 | 1255 | static inline |
ef8f2327 | 1256 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
1257 | gfp_t gfp_mask, |
1258 | unsigned long *total_scanned) | |
4e416953 | 1259 | { |
0608f43d | 1260 | return 0; |
4e416953 BS |
1261 | } |
1262 | ||
e94c8a9c | 1263 | static inline void mem_cgroup_split_huge_fixup(struct page *head) |
ca3e0214 KH |
1264 | { |
1265 | } | |
1266 | ||
2262185c RG |
1267 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
1268 | enum vm_event_item idx, | |
1269 | unsigned long count) | |
1270 | { | |
1271 | } | |
1272 | ||
9851ac13 KT |
1273 | static inline void __count_memcg_events(struct mem_cgroup *memcg, |
1274 | enum vm_event_item idx, | |
1275 | unsigned long count) | |
1276 | { | |
1277 | } | |
1278 | ||
2262185c | 1279 | static inline void count_memcg_page_event(struct page *page, |
04fecbf5 | 1280 | int idx) |
2262185c RG |
1281 | { |
1282 | } | |
1283 | ||
456f998e | 1284 | static inline |
2262185c | 1285 | void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx) |
456f998e YH |
1286 | { |
1287 | } | |
c255a458 | 1288 | #endif /* CONFIG_MEMCG */ |
78fb7466 | 1289 | |
04fecbf5 | 1290 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1291 | static inline void __inc_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1292 | int idx) |
00f3ca2c JW |
1293 | { |
1294 | __mod_memcg_state(memcg, idx, 1); | |
1295 | } | |
1296 | ||
04fecbf5 | 1297 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1298 | static inline void __dec_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1299 | int idx) |
00f3ca2c JW |
1300 | { |
1301 | __mod_memcg_state(memcg, idx, -1); | |
1302 | } | |
1303 | ||
04fecbf5 | 1304 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1305 | static inline void __inc_memcg_page_state(struct page *page, |
04fecbf5 | 1306 | int idx) |
00f3ca2c JW |
1307 | { |
1308 | __mod_memcg_page_state(page, idx, 1); | |
1309 | } | |
1310 | ||
04fecbf5 | 1311 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1312 | static inline void __dec_memcg_page_state(struct page *page, |
04fecbf5 | 1313 | int idx) |
00f3ca2c JW |
1314 | { |
1315 | __mod_memcg_page_state(page, idx, -1); | |
1316 | } | |
1317 | ||
1318 | static inline void __inc_lruvec_state(struct lruvec *lruvec, | |
1319 | enum node_stat_item idx) | |
1320 | { | |
1321 | __mod_lruvec_state(lruvec, idx, 1); | |
1322 | } | |
1323 | ||
1324 | static inline void __dec_lruvec_state(struct lruvec *lruvec, | |
1325 | enum node_stat_item idx) | |
1326 | { | |
1327 | __mod_lruvec_state(lruvec, idx, -1); | |
1328 | } | |
1329 | ||
1330 | static inline void __inc_lruvec_page_state(struct page *page, | |
1331 | enum node_stat_item idx) | |
1332 | { | |
1333 | __mod_lruvec_page_state(page, idx, 1); | |
1334 | } | |
1335 | ||
1336 | static inline void __dec_lruvec_page_state(struct page *page, | |
1337 | enum node_stat_item idx) | |
1338 | { | |
1339 | __mod_lruvec_page_state(page, idx, -1); | |
1340 | } | |
1341 | ||
ec9f0238 RG |
1342 | static inline void __inc_lruvec_slab_state(void *p, enum node_stat_item idx) |
1343 | { | |
1344 | __mod_lruvec_slab_state(p, idx, 1); | |
1345 | } | |
1346 | ||
1347 | static inline void __dec_lruvec_slab_state(void *p, enum node_stat_item idx) | |
1348 | { | |
1349 | __mod_lruvec_slab_state(p, idx, -1); | |
1350 | } | |
1351 | ||
04fecbf5 | 1352 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1353 | static inline void inc_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1354 | int idx) |
00f3ca2c JW |
1355 | { |
1356 | mod_memcg_state(memcg, idx, 1); | |
1357 | } | |
1358 | ||
04fecbf5 | 1359 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1360 | static inline void dec_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1361 | int idx) |
00f3ca2c JW |
1362 | { |
1363 | mod_memcg_state(memcg, idx, -1); | |
1364 | } | |
1365 | ||
04fecbf5 | 1366 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1367 | static inline void inc_memcg_page_state(struct page *page, |
04fecbf5 | 1368 | int idx) |
00f3ca2c JW |
1369 | { |
1370 | mod_memcg_page_state(page, idx, 1); | |
1371 | } | |
1372 | ||
04fecbf5 | 1373 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1374 | static inline void dec_memcg_page_state(struct page *page, |
04fecbf5 | 1375 | int idx) |
00f3ca2c JW |
1376 | { |
1377 | mod_memcg_page_state(page, idx, -1); | |
1378 | } | |
1379 | ||
1380 | static inline void inc_lruvec_state(struct lruvec *lruvec, | |
1381 | enum node_stat_item idx) | |
1382 | { | |
1383 | mod_lruvec_state(lruvec, idx, 1); | |
1384 | } | |
1385 | ||
1386 | static inline void dec_lruvec_state(struct lruvec *lruvec, | |
1387 | enum node_stat_item idx) | |
1388 | { | |
1389 | mod_lruvec_state(lruvec, idx, -1); | |
1390 | } | |
1391 | ||
1392 | static inline void inc_lruvec_page_state(struct page *page, | |
1393 | enum node_stat_item idx) | |
1394 | { | |
1395 | mod_lruvec_page_state(page, idx, 1); | |
1396 | } | |
1397 | ||
1398 | static inline void dec_lruvec_page_state(struct page *page, | |
1399 | enum node_stat_item idx) | |
1400 | { | |
1401 | mod_lruvec_page_state(page, idx, -1); | |
1402 | } | |
1403 | ||
7cf111bc JW |
1404 | static inline struct lruvec *parent_lruvec(struct lruvec *lruvec) |
1405 | { | |
1406 | struct mem_cgroup *memcg; | |
1407 | ||
1408 | memcg = lruvec_memcg(lruvec); | |
1409 | if (!memcg) | |
1410 | return NULL; | |
1411 | memcg = parent_mem_cgroup(memcg); | |
1412 | if (!memcg) | |
1413 | return NULL; | |
1414 | return mem_cgroup_lruvec(memcg, lruvec_pgdat(lruvec)); | |
1415 | } | |
1416 | ||
52ebea74 | 1417 | #ifdef CONFIG_CGROUP_WRITEBACK |
841710aa | 1418 | |
841710aa | 1419 | struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb); |
c5edf9cd TH |
1420 | void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages, |
1421 | unsigned long *pheadroom, unsigned long *pdirty, | |
1422 | unsigned long *pwriteback); | |
841710aa | 1423 | |
97b27821 TH |
1424 | void mem_cgroup_track_foreign_dirty_slowpath(struct page *page, |
1425 | struct bdi_writeback *wb); | |
1426 | ||
1427 | static inline void mem_cgroup_track_foreign_dirty(struct page *page, | |
1428 | struct bdi_writeback *wb) | |
1429 | { | |
08d1d0e6 BH |
1430 | if (mem_cgroup_disabled()) |
1431 | return; | |
1432 | ||
97b27821 TH |
1433 | if (unlikely(&page->mem_cgroup->css != wb->memcg_css)) |
1434 | mem_cgroup_track_foreign_dirty_slowpath(page, wb); | |
1435 | } | |
1436 | ||
1437 | void mem_cgroup_flush_foreign(struct bdi_writeback *wb); | |
1438 | ||
841710aa TH |
1439 | #else /* CONFIG_CGROUP_WRITEBACK */ |
1440 | ||
1441 | static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb) | |
1442 | { | |
1443 | return NULL; | |
1444 | } | |
1445 | ||
c2aa723a | 1446 | static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb, |
c5edf9cd TH |
1447 | unsigned long *pfilepages, |
1448 | unsigned long *pheadroom, | |
c2aa723a TH |
1449 | unsigned long *pdirty, |
1450 | unsigned long *pwriteback) | |
1451 | { | |
1452 | } | |
1453 | ||
97b27821 TH |
1454 | static inline void mem_cgroup_track_foreign_dirty(struct page *page, |
1455 | struct bdi_writeback *wb) | |
1456 | { | |
1457 | } | |
1458 | ||
1459 | static inline void mem_cgroup_flush_foreign(struct bdi_writeback *wb) | |
1460 | { | |
1461 | } | |
1462 | ||
841710aa | 1463 | #endif /* CONFIG_CGROUP_WRITEBACK */ |
52ebea74 | 1464 | |
e1aab161 | 1465 | struct sock; |
baac50bb JW |
1466 | bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); |
1467 | void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); | |
d886f4e4 | 1468 | #ifdef CONFIG_MEMCG |
ef12947c JW |
1469 | extern struct static_key_false memcg_sockets_enabled_key; |
1470 | #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key) | |
2d758073 JW |
1471 | void mem_cgroup_sk_alloc(struct sock *sk); |
1472 | void mem_cgroup_sk_free(struct sock *sk); | |
baac50bb | 1473 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c | 1474 | { |
0db15298 | 1475 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && memcg->tcpmem_pressure) |
8e8ae645 | 1476 | return true; |
8e8ae645 JW |
1477 | do { |
1478 | if (time_before(jiffies, memcg->socket_pressure)) | |
1479 | return true; | |
1480 | } while ((memcg = parent_mem_cgroup(memcg))); | |
1481 | return false; | |
e805605c | 1482 | } |
0a432dcb YS |
1483 | |
1484 | extern int memcg_expand_shrinker_maps(int new_id); | |
1485 | ||
1486 | extern void memcg_set_shrinker_bit(struct mem_cgroup *memcg, | |
1487 | int nid, int shrinker_id); | |
e805605c | 1488 | #else |
80e95fe0 | 1489 | #define mem_cgroup_sockets_enabled 0 |
2d758073 JW |
1490 | static inline void mem_cgroup_sk_alloc(struct sock *sk) { }; |
1491 | static inline void mem_cgroup_sk_free(struct sock *sk) { }; | |
baac50bb | 1492 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c JW |
1493 | { |
1494 | return false; | |
1495 | } | |
0a432dcb YS |
1496 | |
1497 | static inline void memcg_set_shrinker_bit(struct mem_cgroup *memcg, | |
1498 | int nid, int shrinker_id) | |
1499 | { | |
1500 | } | |
e805605c | 1501 | #endif |
7ae1e1d0 | 1502 | |
9b6f7e16 | 1503 | #ifdef CONFIG_MEMCG_KMEM |
4b13f64d RG |
1504 | int __memcg_kmem_charge(struct mem_cgroup *memcg, gfp_t gfp, |
1505 | unsigned int nr_pages); | |
1506 | void __memcg_kmem_uncharge(struct mem_cgroup *memcg, unsigned int nr_pages); | |
f4b00eab RG |
1507 | int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, int order); |
1508 | void __memcg_kmem_uncharge_page(struct page *page, int order); | |
45264778 | 1509 | |
bf4f0599 RG |
1510 | struct obj_cgroup *get_obj_cgroup_from_current(void); |
1511 | ||
1512 | int obj_cgroup_charge(struct obj_cgroup *objcg, gfp_t gfp, size_t size); | |
1513 | void obj_cgroup_uncharge(struct obj_cgroup *objcg, size_t size); | |
1514 | ||
ef12947c | 1515 | extern struct static_key_false memcg_kmem_enabled_key; |
749c5415 | 1516 | |
dbcf73e2 | 1517 | extern int memcg_nr_cache_ids; |
64219994 MH |
1518 | void memcg_get_cache_ids(void); |
1519 | void memcg_put_cache_ids(void); | |
ebe945c2 GC |
1520 | |
1521 | /* | |
1522 | * Helper macro to loop through all memcg-specific caches. Callers must still | |
1523 | * check if the cache is valid (it is either valid or NULL). | |
1524 | * the slab_mutex must be held when looping through those caches | |
1525 | */ | |
749c5415 | 1526 | #define for_each_memcg_cache_index(_idx) \ |
dbcf73e2 | 1527 | for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++) |
749c5415 | 1528 | |
7ae1e1d0 GC |
1529 | static inline bool memcg_kmem_enabled(void) |
1530 | { | |
eda330e5 | 1531 | return static_branch_likely(&memcg_kmem_enabled_key); |
7ae1e1d0 GC |
1532 | } |
1533 | ||
f4b00eab RG |
1534 | static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1535 | int order) | |
60cd4bcd SB |
1536 | { |
1537 | if (memcg_kmem_enabled()) | |
f4b00eab | 1538 | return __memcg_kmem_charge_page(page, gfp, order); |
60cd4bcd SB |
1539 | return 0; |
1540 | } | |
1541 | ||
f4b00eab | 1542 | static inline void memcg_kmem_uncharge_page(struct page *page, int order) |
60cd4bcd SB |
1543 | { |
1544 | if (memcg_kmem_enabled()) | |
f4b00eab | 1545 | __memcg_kmem_uncharge_page(page, order); |
60cd4bcd SB |
1546 | } |
1547 | ||
4b13f64d RG |
1548 | static inline int memcg_kmem_charge(struct mem_cgroup *memcg, gfp_t gfp, |
1549 | unsigned int nr_pages) | |
60cd4bcd SB |
1550 | { |
1551 | if (memcg_kmem_enabled()) | |
4b13f64d | 1552 | return __memcg_kmem_charge(memcg, gfp, nr_pages); |
60cd4bcd SB |
1553 | return 0; |
1554 | } | |
49a18eae | 1555 | |
4b13f64d RG |
1556 | static inline void memcg_kmem_uncharge(struct mem_cgroup *memcg, |
1557 | unsigned int nr_pages) | |
49a18eae RG |
1558 | { |
1559 | if (memcg_kmem_enabled()) | |
4b13f64d | 1560 | __memcg_kmem_uncharge(memcg, nr_pages); |
49a18eae RG |
1561 | } |
1562 | ||
33398cf2 | 1563 | /* |
9f706d68 | 1564 | * helper for accessing a memcg's index. It will be used as an index in the |
33398cf2 MH |
1565 | * child cache array in kmem_cache, and also to derive its name. This function |
1566 | * will return -1 when this is not a kmem-limited memcg. | |
1567 | */ | |
1568 | static inline int memcg_cache_id(struct mem_cgroup *memcg) | |
1569 | { | |
1570 | return memcg ? memcg->kmemcg_id : -1; | |
1571 | } | |
5722d094 | 1572 | |
8380ce47 RG |
1573 | struct mem_cgroup *mem_cgroup_from_obj(void *p); |
1574 | ||
7ae1e1d0 | 1575 | #else |
9b6f7e16 | 1576 | |
f4b00eab RG |
1577 | static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1578 | int order) | |
9b6f7e16 RG |
1579 | { |
1580 | return 0; | |
1581 | } | |
1582 | ||
f4b00eab | 1583 | static inline void memcg_kmem_uncharge_page(struct page *page, int order) |
9b6f7e16 RG |
1584 | { |
1585 | } | |
1586 | ||
f4b00eab RG |
1587 | static inline int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1588 | int order) | |
60cd4bcd SB |
1589 | { |
1590 | return 0; | |
1591 | } | |
1592 | ||
f4b00eab | 1593 | static inline void __memcg_kmem_uncharge_page(struct page *page, int order) |
60cd4bcd SB |
1594 | { |
1595 | } | |
1596 | ||
749c5415 GC |
1597 | #define for_each_memcg_cache_index(_idx) \ |
1598 | for (; NULL; ) | |
1599 | ||
b9ce5ef4 GC |
1600 | static inline bool memcg_kmem_enabled(void) |
1601 | { | |
1602 | return false; | |
1603 | } | |
1604 | ||
2633d7a0 GC |
1605 | static inline int memcg_cache_id(struct mem_cgroup *memcg) |
1606 | { | |
1607 | return -1; | |
1608 | } | |
1609 | ||
05257a1a VD |
1610 | static inline void memcg_get_cache_ids(void) |
1611 | { | |
1612 | } | |
1613 | ||
1614 | static inline void memcg_put_cache_ids(void) | |
1615 | { | |
1616 | } | |
1617 | ||
8380ce47 RG |
1618 | static inline struct mem_cgroup *mem_cgroup_from_obj(void *p) |
1619 | { | |
1620 | return NULL; | |
1621 | } | |
1622 | ||
84c07d11 | 1623 | #endif /* CONFIG_MEMCG_KMEM */ |
127424c8 | 1624 | |
8cdea7c0 | 1625 | #endif /* _LINUX_MEMCONTROL_H */ |