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c942fddf | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
8cdea7c0 BS |
2 | /* memcontrol.h - Memory Controller |
3 | * | |
4 | * Copyright IBM Corporation, 2007 | |
5 | * Author Balbir Singh <balbir@linux.vnet.ibm.com> | |
6 | * | |
78fb7466 PE |
7 | * Copyright 2007 OpenVZ SWsoft Inc |
8 | * Author: Pavel Emelianov <xemul@openvz.org> | |
8cdea7c0 BS |
9 | */ |
10 | ||
11 | #ifndef _LINUX_MEMCONTROL_H | |
12 | #define _LINUX_MEMCONTROL_H | |
f8d66542 | 13 | #include <linux/cgroup.h> |
456f998e | 14 | #include <linux/vm_event_item.h> |
7ae1e1d0 | 15 | #include <linux/hardirq.h> |
a8964b9b | 16 | #include <linux/jump_label.h> |
33398cf2 MH |
17 | #include <linux/page_counter.h> |
18 | #include <linux/vmpressure.h> | |
19 | #include <linux/eventfd.h> | |
00f3ca2c JW |
20 | #include <linux/mm.h> |
21 | #include <linux/vmstat.h> | |
33398cf2 | 22 | #include <linux/writeback.h> |
fdf1cdb9 | 23 | #include <linux/page-flags.h> |
456f998e | 24 | |
78fb7466 | 25 | struct mem_cgroup; |
8697d331 BS |
26 | struct page; |
27 | struct mm_struct; | |
2633d7a0 | 28 | struct kmem_cache; |
78fb7466 | 29 | |
71cd3113 JW |
30 | /* Cgroup-specific page state, on top of universal node page state */ |
31 | enum memcg_stat_item { | |
32 | MEMCG_CACHE = NR_VM_NODE_STAT_ITEMS, | |
33 | MEMCG_RSS, | |
34 | MEMCG_RSS_HUGE, | |
35 | MEMCG_SWAP, | |
36 | MEMCG_SOCK, | |
37 | /* XXX: why are these zone and not node counters? */ | |
38 | MEMCG_KERNEL_STACK_KB, | |
b2807f07 | 39 | MEMCG_NR_STAT, |
2a7106f2 GT |
40 | }; |
41 | ||
e27be240 JW |
42 | enum memcg_memory_event { |
43 | MEMCG_LOW, | |
71cd3113 JW |
44 | MEMCG_HIGH, |
45 | MEMCG_MAX, | |
46 | MEMCG_OOM, | |
fe6bdfc8 | 47 | MEMCG_OOM_KILL, |
4b82ab4f | 48 | MEMCG_SWAP_HIGH, |
f3a53a3a TH |
49 | MEMCG_SWAP_MAX, |
50 | MEMCG_SWAP_FAIL, | |
e27be240 | 51 | MEMCG_NR_MEMORY_EVENTS, |
71cd3113 JW |
52 | }; |
53 | ||
bf8d5d52 RG |
54 | enum mem_cgroup_protection { |
55 | MEMCG_PROT_NONE, | |
56 | MEMCG_PROT_LOW, | |
57 | MEMCG_PROT_MIN, | |
58 | }; | |
59 | ||
5660048c | 60 | struct mem_cgroup_reclaim_cookie { |
ef8f2327 | 61 | pg_data_t *pgdat; |
5660048c JW |
62 | unsigned int generation; |
63 | }; | |
64 | ||
71cd3113 JW |
65 | #ifdef CONFIG_MEMCG |
66 | ||
67 | #define MEM_CGROUP_ID_SHIFT 16 | |
68 | #define MEM_CGROUP_ID_MAX USHRT_MAX | |
69 | ||
70 | struct mem_cgroup_id { | |
71 | int id; | |
1c2d479a | 72 | refcount_t ref; |
71cd3113 JW |
73 | }; |
74 | ||
33398cf2 MH |
75 | /* |
76 | * Per memcg event counter is incremented at every pagein/pageout. With THP, | |
77 | * it will be incremated by the number of pages. This counter is used for | |
78 | * for trigger some periodic events. This is straightforward and better | |
79 | * than using jiffies etc. to handle periodic memcg event. | |
80 | */ | |
81 | enum mem_cgroup_events_target { | |
82 | MEM_CGROUP_TARGET_THRESH, | |
83 | MEM_CGROUP_TARGET_SOFTLIMIT, | |
33398cf2 MH |
84 | MEM_CGROUP_NTARGETS, |
85 | }; | |
86 | ||
871789d4 CD |
87 | struct memcg_vmstats_percpu { |
88 | long stat[MEMCG_NR_STAT]; | |
e27be240 | 89 | unsigned long events[NR_VM_EVENT_ITEMS]; |
33398cf2 MH |
90 | unsigned long nr_page_events; |
91 | unsigned long targets[MEM_CGROUP_NTARGETS]; | |
92 | }; | |
93 | ||
94 | struct mem_cgroup_reclaim_iter { | |
95 | struct mem_cgroup *position; | |
96 | /* scan generation, increased every round-trip */ | |
97 | unsigned int generation; | |
98 | }; | |
99 | ||
00f3ca2c JW |
100 | struct lruvec_stat { |
101 | long count[NR_VM_NODE_STAT_ITEMS]; | |
102 | }; | |
103 | ||
0a4465d3 KT |
104 | /* |
105 | * Bitmap of shrinker::id corresponding to memcg-aware shrinkers, | |
106 | * which have elements charged to this memcg. | |
107 | */ | |
108 | struct memcg_shrinker_map { | |
109 | struct rcu_head rcu; | |
307ed94c | 110 | unsigned long map[]; |
0a4465d3 KT |
111 | }; |
112 | ||
33398cf2 | 113 | /* |
242c37b4 | 114 | * per-node information in memory controller. |
33398cf2 | 115 | */ |
ef8f2327 | 116 | struct mem_cgroup_per_node { |
33398cf2 | 117 | struct lruvec lruvec; |
a983b5eb | 118 | |
815744d7 JW |
119 | /* Legacy local VM stats */ |
120 | struct lruvec_stat __percpu *lruvec_stat_local; | |
121 | ||
122 | /* Subtree VM stats (batched updates) */ | |
a983b5eb JW |
123 | struct lruvec_stat __percpu *lruvec_stat_cpu; |
124 | atomic_long_t lruvec_stat[NR_VM_NODE_STAT_ITEMS]; | |
125 | ||
b4536f0c | 126 | unsigned long lru_zone_size[MAX_NR_ZONES][NR_LRU_LISTS]; |
33398cf2 | 127 | |
9da83f3f | 128 | struct mem_cgroup_reclaim_iter iter; |
33398cf2 | 129 | |
0a4465d3 | 130 | struct memcg_shrinker_map __rcu *shrinker_map; |
0a432dcb | 131 | |
33398cf2 MH |
132 | struct rb_node tree_node; /* RB tree node */ |
133 | unsigned long usage_in_excess;/* Set to the value by which */ | |
134 | /* the soft limit is exceeded*/ | |
135 | bool on_tree; | |
136 | struct mem_cgroup *memcg; /* Back pointer, we cannot */ | |
137 | /* use container_of */ | |
138 | }; | |
139 | ||
33398cf2 MH |
140 | struct mem_cgroup_threshold { |
141 | struct eventfd_ctx *eventfd; | |
142 | unsigned long threshold; | |
143 | }; | |
144 | ||
145 | /* For threshold */ | |
146 | struct mem_cgroup_threshold_ary { | |
147 | /* An array index points to threshold just below or equal to usage. */ | |
148 | int current_threshold; | |
149 | /* Size of entries[] */ | |
150 | unsigned int size; | |
151 | /* Array of thresholds */ | |
307ed94c | 152 | struct mem_cgroup_threshold entries[]; |
33398cf2 MH |
153 | }; |
154 | ||
155 | struct mem_cgroup_thresholds { | |
156 | /* Primary thresholds array */ | |
157 | struct mem_cgroup_threshold_ary *primary; | |
158 | /* | |
159 | * Spare threshold array. | |
160 | * This is needed to make mem_cgroup_unregister_event() "never fail". | |
161 | * It must be able to store at least primary->size - 1 entries. | |
162 | */ | |
163 | struct mem_cgroup_threshold_ary *spare; | |
164 | }; | |
165 | ||
567e9ab2 JW |
166 | enum memcg_kmem_state { |
167 | KMEM_NONE, | |
168 | KMEM_ALLOCATED, | |
169 | KMEM_ONLINE, | |
170 | }; | |
171 | ||
e81bf979 AL |
172 | #if defined(CONFIG_SMP) |
173 | struct memcg_padding { | |
174 | char x[0]; | |
175 | } ____cacheline_internodealigned_in_smp; | |
176 | #define MEMCG_PADDING(name) struct memcg_padding name; | |
177 | #else | |
178 | #define MEMCG_PADDING(name) | |
179 | #endif | |
180 | ||
97b27821 TH |
181 | /* |
182 | * Remember four most recent foreign writebacks with dirty pages in this | |
183 | * cgroup. Inode sharing is expected to be uncommon and, even if we miss | |
184 | * one in a given round, we're likely to catch it later if it keeps | |
185 | * foreign-dirtying, so a fairly low count should be enough. | |
186 | * | |
187 | * See mem_cgroup_track_foreign_dirty_slowpath() for details. | |
188 | */ | |
189 | #define MEMCG_CGWB_FRN_CNT 4 | |
190 | ||
191 | struct memcg_cgwb_frn { | |
192 | u64 bdi_id; /* bdi->id of the foreign inode */ | |
193 | int memcg_id; /* memcg->css.id of foreign inode */ | |
194 | u64 at; /* jiffies_64 at the time of dirtying */ | |
195 | struct wb_completion done; /* tracks in-flight foreign writebacks */ | |
196 | }; | |
197 | ||
33398cf2 MH |
198 | /* |
199 | * The memory controller data structure. The memory controller controls both | |
200 | * page cache and RSS per cgroup. We would eventually like to provide | |
201 | * statistics based on the statistics developed by Rik Van Riel for clock-pro, | |
202 | * to help the administrator determine what knobs to tune. | |
203 | */ | |
204 | struct mem_cgroup { | |
205 | struct cgroup_subsys_state css; | |
206 | ||
73f576c0 JW |
207 | /* Private memcg ID. Used to ID objects that outlive the cgroup */ |
208 | struct mem_cgroup_id id; | |
209 | ||
33398cf2 MH |
210 | /* Accounted resources */ |
211 | struct page_counter memory; | |
37e84351 | 212 | struct page_counter swap; |
0db15298 JW |
213 | |
214 | /* Legacy consumer-oriented counters */ | |
33398cf2 MH |
215 | struct page_counter memsw; |
216 | struct page_counter kmem; | |
0db15298 | 217 | struct page_counter tcpmem; |
33398cf2 | 218 | |
f7e1cb6e JW |
219 | /* Range enforcement for interrupt charges */ |
220 | struct work_struct high_work; | |
221 | ||
33398cf2 MH |
222 | unsigned long soft_limit; |
223 | ||
224 | /* vmpressure notifications */ | |
225 | struct vmpressure vmpressure; | |
226 | ||
33398cf2 MH |
227 | /* |
228 | * Should the accounting and control be hierarchical, per subtree? | |
229 | */ | |
230 | bool use_hierarchy; | |
231 | ||
3d8b38eb RG |
232 | /* |
233 | * Should the OOM killer kill all belonging tasks, had it kill one? | |
234 | */ | |
235 | bool oom_group; | |
236 | ||
33398cf2 MH |
237 | /* protected by memcg_oom_lock */ |
238 | bool oom_lock; | |
239 | int under_oom; | |
240 | ||
241 | int swappiness; | |
242 | /* OOM-Killer disable */ | |
243 | int oom_kill_disable; | |
244 | ||
1e577f97 | 245 | /* memory.events and memory.events.local */ |
472912a2 | 246 | struct cgroup_file events_file; |
1e577f97 | 247 | struct cgroup_file events_local_file; |
472912a2 | 248 | |
f3a53a3a TH |
249 | /* handle for "memory.swap.events" */ |
250 | struct cgroup_file swap_events_file; | |
251 | ||
33398cf2 MH |
252 | /* protect arrays of thresholds */ |
253 | struct mutex thresholds_lock; | |
254 | ||
255 | /* thresholds for memory usage. RCU-protected */ | |
256 | struct mem_cgroup_thresholds thresholds; | |
257 | ||
258 | /* thresholds for mem+swap usage. RCU-protected */ | |
259 | struct mem_cgroup_thresholds memsw_thresholds; | |
260 | ||
261 | /* For oom notifier event fd */ | |
262 | struct list_head oom_notify; | |
263 | ||
264 | /* | |
265 | * Should we move charges of a task when a task is moved into this | |
266 | * mem_cgroup ? And what type of charges should we move ? | |
267 | */ | |
268 | unsigned long move_charge_at_immigrate; | |
e81bf979 AL |
269 | /* taken only while moving_account > 0 */ |
270 | spinlock_t move_lock; | |
271 | unsigned long move_lock_flags; | |
272 | ||
273 | MEMCG_PADDING(_pad1_); | |
274 | ||
33398cf2 MH |
275 | /* |
276 | * set > 0 if pages under this cgroup are moving to other cgroup. | |
277 | */ | |
278 | atomic_t moving_account; | |
33398cf2 | 279 | struct task_struct *move_lock_task; |
a983b5eb | 280 | |
815744d7 JW |
281 | /* Legacy local VM stats and events */ |
282 | struct memcg_vmstats_percpu __percpu *vmstats_local; | |
283 | ||
284 | /* Subtree VM stats and events (batched updates) */ | |
871789d4 | 285 | struct memcg_vmstats_percpu __percpu *vmstats_percpu; |
e81bf979 AL |
286 | |
287 | MEMCG_PADDING(_pad2_); | |
288 | ||
871789d4 CD |
289 | atomic_long_t vmstats[MEMCG_NR_STAT]; |
290 | atomic_long_t vmevents[NR_VM_EVENT_ITEMS]; | |
42a30035 | 291 | |
815744d7 | 292 | /* memory.events */ |
42a30035 | 293 | atomic_long_t memory_events[MEMCG_NR_MEMORY_EVENTS]; |
1e577f97 | 294 | atomic_long_t memory_events_local[MEMCG_NR_MEMORY_EVENTS]; |
33398cf2 | 295 | |
d886f4e4 JW |
296 | unsigned long socket_pressure; |
297 | ||
298 | /* Legacy tcp memory accounting */ | |
0db15298 JW |
299 | bool tcpmem_active; |
300 | int tcpmem_pressure; | |
d886f4e4 | 301 | |
84c07d11 | 302 | #ifdef CONFIG_MEMCG_KMEM |
33398cf2 MH |
303 | /* Index in the kmem_cache->memcg_params.memcg_caches array */ |
304 | int kmemcg_id; | |
567e9ab2 | 305 | enum memcg_kmem_state kmem_state; |
bc2791f8 | 306 | struct list_head kmem_caches; |
33398cf2 MH |
307 | #endif |
308 | ||
33398cf2 MH |
309 | #ifdef CONFIG_CGROUP_WRITEBACK |
310 | struct list_head cgwb_list; | |
311 | struct wb_domain cgwb_domain; | |
97b27821 | 312 | struct memcg_cgwb_frn cgwb_frn[MEMCG_CGWB_FRN_CNT]; |
33398cf2 MH |
313 | #endif |
314 | ||
315 | /* List of events which userspace want to receive */ | |
316 | struct list_head event_list; | |
317 | spinlock_t event_list_lock; | |
318 | ||
87eaceb3 YS |
319 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
320 | struct deferred_split deferred_split_queue; | |
321 | #endif | |
322 | ||
33398cf2 MH |
323 | struct mem_cgroup_per_node *nodeinfo[0]; |
324 | /* WARNING: nodeinfo must be the last member here */ | |
325 | }; | |
7d828602 | 326 | |
a983b5eb JW |
327 | /* |
328 | * size of first charge trial. "32" comes from vmscan.c's magic value. | |
329 | * TODO: maybe necessary to use big numbers in big irons. | |
330 | */ | |
331 | #define MEMCG_CHARGE_BATCH 32U | |
332 | ||
7d828602 | 333 | extern struct mem_cgroup *root_mem_cgroup; |
56161634 | 334 | |
dfd2f10c KT |
335 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
336 | { | |
337 | return (memcg == root_mem_cgroup); | |
338 | } | |
339 | ||
23047a96 JW |
340 | static inline bool mem_cgroup_disabled(void) |
341 | { | |
342 | return !cgroup_subsys_enabled(memory_cgrp_subsys); | |
343 | } | |
344 | ||
1bc63fb1 CD |
345 | static inline unsigned long mem_cgroup_protection(struct mem_cgroup *memcg, |
346 | bool in_low_reclaim) | |
9783aa99 | 347 | { |
1bc63fb1 CD |
348 | if (mem_cgroup_disabled()) |
349 | return 0; | |
350 | ||
351 | if (in_low_reclaim) | |
352 | return READ_ONCE(memcg->memory.emin); | |
9783aa99 | 353 | |
1bc63fb1 CD |
354 | return max(READ_ONCE(memcg->memory.emin), |
355 | READ_ONCE(memcg->memory.elow)); | |
9783aa99 CD |
356 | } |
357 | ||
bf8d5d52 RG |
358 | enum mem_cgroup_protection mem_cgroup_protected(struct mem_cgroup *root, |
359 | struct mem_cgroup *memcg); | |
241994ed | 360 | |
00501b53 | 361 | int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
3fba69a5 | 362 | gfp_t gfp_mask, struct mem_cgroup **memcgp); |
2cf85583 | 363 | int mem_cgroup_try_charge_delay(struct page *page, struct mm_struct *mm, |
3fba69a5 | 364 | gfp_t gfp_mask, struct mem_cgroup **memcgp); |
00501b53 | 365 | void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg, |
3fba69a5 JW |
366 | bool lrucare); |
367 | void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg); | |
3fea5a49 JW |
368 | |
369 | int mem_cgroup_charge(struct page *page, struct mm_struct *mm, gfp_t gfp_mask, | |
370 | bool lrucare); | |
371 | ||
0a31bc97 | 372 | void mem_cgroup_uncharge(struct page *page); |
747db954 | 373 | void mem_cgroup_uncharge_list(struct list_head *page_list); |
569b846d | 374 | |
6a93ca8f | 375 | void mem_cgroup_migrate(struct page *oldpage, struct page *newpage); |
569b846d | 376 | |
ef8f2327 MG |
377 | static struct mem_cgroup_per_node * |
378 | mem_cgroup_nodeinfo(struct mem_cgroup *memcg, int nid) | |
55779ec7 | 379 | { |
ef8f2327 | 380 | return memcg->nodeinfo[nid]; |
55779ec7 JW |
381 | } |
382 | ||
383 | /** | |
867e5e1d | 384 | * mem_cgroup_lruvec - get the lru list vector for a memcg & node |
55779ec7 JW |
385 | * @memcg: memcg of the wanted lruvec |
386 | * | |
867e5e1d JW |
387 | * Returns the lru list vector holding pages for a given @memcg & |
388 | * @node combination. This can be the node lruvec, if the memory | |
389 | * controller is disabled. | |
55779ec7 | 390 | */ |
867e5e1d JW |
391 | static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg, |
392 | struct pglist_data *pgdat) | |
55779ec7 | 393 | { |
ef8f2327 | 394 | struct mem_cgroup_per_node *mz; |
55779ec7 JW |
395 | struct lruvec *lruvec; |
396 | ||
397 | if (mem_cgroup_disabled()) { | |
867e5e1d | 398 | lruvec = &pgdat->__lruvec; |
55779ec7 JW |
399 | goto out; |
400 | } | |
401 | ||
1b05117d JW |
402 | if (!memcg) |
403 | memcg = root_mem_cgroup; | |
404 | ||
ef8f2327 | 405 | mz = mem_cgroup_nodeinfo(memcg, pgdat->node_id); |
55779ec7 JW |
406 | lruvec = &mz->lruvec; |
407 | out: | |
408 | /* | |
409 | * Since a node can be onlined after the mem_cgroup was created, | |
599d0c95 | 410 | * we have to be prepared to initialize lruvec->pgdat here; |
55779ec7 JW |
411 | * and if offlined then reonlined, we need to reinitialize it. |
412 | */ | |
ef8f2327 MG |
413 | if (unlikely(lruvec->pgdat != pgdat)) |
414 | lruvec->pgdat = pgdat; | |
55779ec7 JW |
415 | return lruvec; |
416 | } | |
417 | ||
599d0c95 | 418 | struct lruvec *mem_cgroup_page_lruvec(struct page *, struct pglist_data *); |
c9b0ed51 | 419 | |
64219994 | 420 | struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
e993d905 | 421 | |
d46eb14b SB |
422 | struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm); |
423 | ||
f745c6f5 SB |
424 | struct mem_cgroup *get_mem_cgroup_from_page(struct page *page); |
425 | ||
33398cf2 MH |
426 | static inline |
427 | struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){ | |
428 | return css ? container_of(css, struct mem_cgroup, css) : NULL; | |
429 | } | |
430 | ||
dc0b5864 RG |
431 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
432 | { | |
d46eb14b SB |
433 | if (memcg) |
434 | css_put(&memcg->css); | |
dc0b5864 RG |
435 | } |
436 | ||
8e8ae645 JW |
437 | #define mem_cgroup_from_counter(counter, member) \ |
438 | container_of(counter, struct mem_cgroup, member) | |
439 | ||
33398cf2 MH |
440 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
441 | struct mem_cgroup *, | |
442 | struct mem_cgroup_reclaim_cookie *); | |
443 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); | |
7c5f64f8 VD |
444 | int mem_cgroup_scan_tasks(struct mem_cgroup *, |
445 | int (*)(struct task_struct *, void *), void *); | |
33398cf2 | 446 | |
23047a96 JW |
447 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
448 | { | |
449 | if (mem_cgroup_disabled()) | |
450 | return 0; | |
451 | ||
73f576c0 | 452 | return memcg->id.id; |
23047a96 | 453 | } |
73f576c0 | 454 | struct mem_cgroup *mem_cgroup_from_id(unsigned short id); |
23047a96 | 455 | |
aa9694bb CD |
456 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
457 | { | |
458 | return mem_cgroup_from_css(seq_css(m)); | |
459 | } | |
460 | ||
2262185c RG |
461 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
462 | { | |
463 | struct mem_cgroup_per_node *mz; | |
464 | ||
465 | if (mem_cgroup_disabled()) | |
466 | return NULL; | |
467 | ||
468 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
469 | return mz->memcg; | |
470 | } | |
471 | ||
8e8ae645 JW |
472 | /** |
473 | * parent_mem_cgroup - find the accounting parent of a memcg | |
474 | * @memcg: memcg whose parent to find | |
475 | * | |
476 | * Returns the parent memcg, or NULL if this is the root or the memory | |
477 | * controller is in legacy no-hierarchy mode. | |
478 | */ | |
479 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) | |
480 | { | |
481 | if (!memcg->memory.parent) | |
482 | return NULL; | |
483 | return mem_cgroup_from_counter(memcg->memory.parent, memory); | |
484 | } | |
485 | ||
33398cf2 MH |
486 | static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, |
487 | struct mem_cgroup *root) | |
488 | { | |
489 | if (root == memcg) | |
490 | return true; | |
491 | if (!root->use_hierarchy) | |
492 | return false; | |
493 | return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup); | |
494 | } | |
e1aab161 | 495 | |
2314b42d JW |
496 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
497 | struct mem_cgroup *memcg) | |
2e4d4091 | 498 | { |
587af308 | 499 | struct mem_cgroup *task_memcg; |
413918bb | 500 | bool match = false; |
c3ac9a8a | 501 | |
2e4d4091 | 502 | rcu_read_lock(); |
587af308 | 503 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
413918bb | 504 | if (task_memcg) |
2314b42d | 505 | match = mem_cgroup_is_descendant(task_memcg, memcg); |
2e4d4091 | 506 | rcu_read_unlock(); |
c3ac9a8a | 507 | return match; |
2e4d4091 | 508 | } |
8a9f3ccd | 509 | |
64219994 | 510 | struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page); |
2fc04524 | 511 | ino_t page_cgroup_ino(struct page *page); |
d324236b | 512 | |
eb01aaab VD |
513 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
514 | { | |
515 | if (mem_cgroup_disabled()) | |
516 | return true; | |
517 | return !!(memcg->css.flags & CSS_ONLINE); | |
518 | } | |
519 | ||
58ae83db KH |
520 | /* |
521 | * For memory reclaim. | |
522 | */ | |
889976db | 523 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
33398cf2 MH |
524 | |
525 | void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, | |
b4536f0c | 526 | int zid, int nr_pages); |
33398cf2 | 527 | |
b4536f0c MH |
528 | static inline |
529 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
530 | enum lru_list lru, int zone_idx) | |
531 | { | |
532 | struct mem_cgroup_per_node *mz; | |
533 | ||
534 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
535 | return mz->lru_zone_size[zone_idx][lru]; | |
33398cf2 MH |
536 | } |
537 | ||
b23afb93 TH |
538 | void mem_cgroup_handle_over_high(void); |
539 | ||
bbec2e15 | 540 | unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg); |
7c5f64f8 | 541 | |
9783aa99 CD |
542 | unsigned long mem_cgroup_size(struct mem_cgroup *memcg); |
543 | ||
f0c867d9 | 544 | void mem_cgroup_print_oom_context(struct mem_cgroup *memcg, |
64219994 | 545 | struct task_struct *p); |
58ae83db | 546 | |
f0c867d9 | 547 | void mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg); |
548 | ||
29ef680a | 549 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 | 550 | { |
29ef680a MH |
551 | WARN_ON(current->in_user_fault); |
552 | current->in_user_fault = 1; | |
519e5247 JW |
553 | } |
554 | ||
29ef680a | 555 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 | 556 | { |
29ef680a MH |
557 | WARN_ON(!current->in_user_fault); |
558 | current->in_user_fault = 0; | |
519e5247 JW |
559 | } |
560 | ||
3812c8c8 JW |
561 | static inline bool task_in_memcg_oom(struct task_struct *p) |
562 | { | |
626ebc41 | 563 | return p->memcg_in_oom; |
3812c8c8 JW |
564 | } |
565 | ||
49426420 | 566 | bool mem_cgroup_oom_synchronize(bool wait); |
3d8b38eb RG |
567 | struct mem_cgroup *mem_cgroup_get_oom_group(struct task_struct *victim, |
568 | struct mem_cgroup *oom_domain); | |
569 | void mem_cgroup_print_oom_group(struct mem_cgroup *memcg); | |
3812c8c8 | 570 | |
c255a458 | 571 | #ifdef CONFIG_MEMCG_SWAP |
c077719b KH |
572 | extern int do_swap_account; |
573 | #endif | |
f8d66542 | 574 | |
739f79fc JW |
575 | struct mem_cgroup *lock_page_memcg(struct page *page); |
576 | void __unlock_page_memcg(struct mem_cgroup *memcg); | |
62cccb8c | 577 | void unlock_page_memcg(struct page *page); |
d7365e78 | 578 | |
42a30035 JW |
579 | /* |
580 | * idx can be of type enum memcg_stat_item or node_stat_item. | |
581 | * Keep in sync with memcg_exact_page_state(). | |
582 | */ | |
583 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx) | |
584 | { | |
585 | long x = atomic_long_read(&memcg->vmstats[idx]); | |
586 | #ifdef CONFIG_SMP | |
587 | if (x < 0) | |
588 | x = 0; | |
589 | #endif | |
590 | return x; | |
591 | } | |
592 | ||
0b3d6e6f GT |
593 | /* |
594 | * idx can be of type enum memcg_stat_item or node_stat_item. | |
595 | * Keep in sync with memcg_exact_page_state(). | |
596 | */ | |
205b20cc JW |
597 | static inline unsigned long memcg_page_state_local(struct mem_cgroup *memcg, |
598 | int idx) | |
2a2e4885 | 599 | { |
815744d7 JW |
600 | long x = 0; |
601 | int cpu; | |
602 | ||
603 | for_each_possible_cpu(cpu) | |
604 | x += per_cpu(memcg->vmstats_local->stat[idx], cpu); | |
a983b5eb JW |
605 | #ifdef CONFIG_SMP |
606 | if (x < 0) | |
607 | x = 0; | |
608 | #endif | |
609 | return x; | |
2a2e4885 JW |
610 | } |
611 | ||
db9adbcb | 612 | void __mod_memcg_state(struct mem_cgroup *memcg, int idx, int val); |
2a2e4885 | 613 | |
04fecbf5 | 614 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 615 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 616 | int idx, int val) |
2a2e4885 | 617 | { |
c3cc3911 JW |
618 | unsigned long flags; |
619 | ||
620 | local_irq_save(flags); | |
a983b5eb | 621 | __mod_memcg_state(memcg, idx, val); |
c3cc3911 | 622 | local_irq_restore(flags); |
2a2e4885 JW |
623 | } |
624 | ||
33398cf2 | 625 | /** |
ccda7f43 | 626 | * mod_memcg_page_state - update page state statistics |
62cccb8c | 627 | * @page: the page |
33398cf2 MH |
628 | * @idx: page state item to account |
629 | * @val: number of pages (positive or negative) | |
630 | * | |
fdf1cdb9 JW |
631 | * The @page must be locked or the caller must use lock_page_memcg() |
632 | * to prevent double accounting when the page is concurrently being | |
633 | * moved to another memcg: | |
81f8c3a4 | 634 | * |
fdf1cdb9 | 635 | * lock_page(page) or lock_page_memcg(page) |
81f8c3a4 | 636 | * if (TestClearPageState(page)) |
ccda7f43 | 637 | * mod_memcg_page_state(page, state, -1); |
fdf1cdb9 | 638 | * unlock_page(page) or unlock_page_memcg(page) |
2a2e4885 JW |
639 | * |
640 | * Kernel pages are an exception to this, since they'll never move. | |
33398cf2 | 641 | */ |
00f3ca2c | 642 | static inline void __mod_memcg_page_state(struct page *page, |
04fecbf5 | 643 | int idx, int val) |
00f3ca2c JW |
644 | { |
645 | if (page->mem_cgroup) | |
646 | __mod_memcg_state(page->mem_cgroup, idx, val); | |
647 | } | |
648 | ||
ccda7f43 | 649 | static inline void mod_memcg_page_state(struct page *page, |
04fecbf5 | 650 | int idx, int val) |
33398cf2 | 651 | { |
62cccb8c | 652 | if (page->mem_cgroup) |
ccda7f43 | 653 | mod_memcg_state(page->mem_cgroup, idx, val); |
33398cf2 MH |
654 | } |
655 | ||
42a30035 JW |
656 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
657 | enum node_stat_item idx) | |
658 | { | |
659 | struct mem_cgroup_per_node *pn; | |
660 | long x; | |
661 | ||
662 | if (mem_cgroup_disabled()) | |
663 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
664 | ||
665 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
666 | x = atomic_long_read(&pn->lruvec_stat[idx]); | |
667 | #ifdef CONFIG_SMP | |
668 | if (x < 0) | |
669 | x = 0; | |
670 | #endif | |
671 | return x; | |
672 | } | |
673 | ||
205b20cc JW |
674 | static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
675 | enum node_stat_item idx) | |
2a7106f2 | 676 | { |
00f3ca2c | 677 | struct mem_cgroup_per_node *pn; |
815744d7 JW |
678 | long x = 0; |
679 | int cpu; | |
00f3ca2c JW |
680 | |
681 | if (mem_cgroup_disabled()) | |
682 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
683 | ||
684 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
815744d7 JW |
685 | for_each_possible_cpu(cpu) |
686 | x += per_cpu(pn->lruvec_stat_local->count[idx], cpu); | |
a983b5eb JW |
687 | #ifdef CONFIG_SMP |
688 | if (x < 0) | |
689 | x = 0; | |
690 | #endif | |
691 | return x; | |
2a7106f2 GT |
692 | } |
693 | ||
db9adbcb JW |
694 | void __mod_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx, |
695 | int val); | |
ec9f0238 | 696 | void __mod_lruvec_slab_state(void *p, enum node_stat_item idx, int val); |
8380ce47 | 697 | void mod_memcg_obj_state(void *p, int idx, int val); |
00f3ca2c JW |
698 | |
699 | static inline void mod_lruvec_state(struct lruvec *lruvec, | |
700 | enum node_stat_item idx, int val) | |
701 | { | |
c3cc3911 JW |
702 | unsigned long flags; |
703 | ||
704 | local_irq_save(flags); | |
28454265 | 705 | __mod_lruvec_state(lruvec, idx, val); |
c3cc3911 | 706 | local_irq_restore(flags); |
00f3ca2c JW |
707 | } |
708 | ||
709 | static inline void __mod_lruvec_page_state(struct page *page, | |
710 | enum node_stat_item idx, int val) | |
711 | { | |
28454265 JW |
712 | pg_data_t *pgdat = page_pgdat(page); |
713 | struct lruvec *lruvec; | |
00f3ca2c | 714 | |
28454265 JW |
715 | /* Untracked pages have no memcg, no lruvec. Update only the node */ |
716 | if (!page->mem_cgroup) { | |
717 | __mod_node_page_state(pgdat, idx, val); | |
00f3ca2c | 718 | return; |
28454265 JW |
719 | } |
720 | ||
867e5e1d | 721 | lruvec = mem_cgroup_lruvec(page->mem_cgroup, pgdat); |
28454265 | 722 | __mod_lruvec_state(lruvec, idx, val); |
00f3ca2c JW |
723 | } |
724 | ||
725 | static inline void mod_lruvec_page_state(struct page *page, | |
726 | enum node_stat_item idx, int val) | |
727 | { | |
c3cc3911 JW |
728 | unsigned long flags; |
729 | ||
730 | local_irq_save(flags); | |
28454265 | 731 | __mod_lruvec_page_state(page, idx, val); |
c3cc3911 | 732 | local_irq_restore(flags); |
2a7106f2 GT |
733 | } |
734 | ||
ef8f2327 | 735 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
736 | gfp_t gfp_mask, |
737 | unsigned long *total_scanned); | |
a63d83f4 | 738 | |
db9adbcb JW |
739 | void __count_memcg_events(struct mem_cgroup *memcg, enum vm_event_item idx, |
740 | unsigned long count); | |
c9019e9b | 741 | |
2262185c | 742 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
e27be240 JW |
743 | enum vm_event_item idx, |
744 | unsigned long count) | |
2262185c | 745 | { |
c3cc3911 JW |
746 | unsigned long flags; |
747 | ||
748 | local_irq_save(flags); | |
a983b5eb | 749 | __count_memcg_events(memcg, idx, count); |
c3cc3911 | 750 | local_irq_restore(flags); |
2262185c RG |
751 | } |
752 | ||
753 | static inline void count_memcg_page_event(struct page *page, | |
e27be240 | 754 | enum vm_event_item idx) |
2262185c RG |
755 | { |
756 | if (page->mem_cgroup) | |
757 | count_memcg_events(page->mem_cgroup, idx, 1); | |
758 | } | |
759 | ||
760 | static inline void count_memcg_event_mm(struct mm_struct *mm, | |
761 | enum vm_event_item idx) | |
68ae564b | 762 | { |
33398cf2 MH |
763 | struct mem_cgroup *memcg; |
764 | ||
68ae564b DR |
765 | if (mem_cgroup_disabled()) |
766 | return; | |
33398cf2 MH |
767 | |
768 | rcu_read_lock(); | |
769 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
fe6bdfc8 | 770 | if (likely(memcg)) |
c9019e9b | 771 | count_memcg_events(memcg, idx, 1); |
33398cf2 | 772 | rcu_read_unlock(); |
68ae564b | 773 | } |
c9019e9b | 774 | |
e27be240 JW |
775 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
776 | enum memcg_memory_event event) | |
c9019e9b | 777 | { |
1e577f97 SB |
778 | atomic_long_inc(&memcg->memory_events_local[event]); |
779 | cgroup_file_notify(&memcg->events_local_file); | |
780 | ||
9852ae3f CD |
781 | do { |
782 | atomic_long_inc(&memcg->memory_events[event]); | |
783 | cgroup_file_notify(&memcg->events_file); | |
784 | ||
04fd61a4 YS |
785 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys)) |
786 | break; | |
9852ae3f CD |
787 | if (cgrp_dfl_root.flags & CGRP_ROOT_MEMORY_LOCAL_EVENTS) |
788 | break; | |
789 | } while ((memcg = parent_mem_cgroup(memcg)) && | |
790 | !mem_cgroup_is_root(memcg)); | |
c9019e9b JW |
791 | } |
792 | ||
fe6bdfc8 RG |
793 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
794 | enum memcg_memory_event event) | |
795 | { | |
796 | struct mem_cgroup *memcg; | |
797 | ||
798 | if (mem_cgroup_disabled()) | |
799 | return; | |
800 | ||
801 | rcu_read_lock(); | |
802 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
803 | if (likely(memcg)) | |
804 | memcg_memory_event(memcg, event); | |
805 | rcu_read_unlock(); | |
806 | } | |
807 | ||
ca3e0214 | 808 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
e94c8a9c | 809 | void mem_cgroup_split_huge_fixup(struct page *head); |
ca3e0214 KH |
810 | #endif |
811 | ||
c255a458 | 812 | #else /* CONFIG_MEMCG */ |
23047a96 JW |
813 | |
814 | #define MEM_CGROUP_ID_SHIFT 0 | |
815 | #define MEM_CGROUP_ID_MAX 0 | |
816 | ||
7a81b88c KH |
817 | struct mem_cgroup; |
818 | ||
dfd2f10c KT |
819 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
820 | { | |
821 | return true; | |
822 | } | |
823 | ||
23047a96 JW |
824 | static inline bool mem_cgroup_disabled(void) |
825 | { | |
826 | return true; | |
827 | } | |
828 | ||
e27be240 JW |
829 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
830 | enum memcg_memory_event event) | |
241994ed JW |
831 | { |
832 | } | |
833 | ||
fe6bdfc8 RG |
834 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
835 | enum memcg_memory_event event) | |
836 | { | |
837 | } | |
838 | ||
1bc63fb1 CD |
839 | static inline unsigned long mem_cgroup_protection(struct mem_cgroup *memcg, |
840 | bool in_low_reclaim) | |
9783aa99 | 841 | { |
1bc63fb1 | 842 | return 0; |
9783aa99 CD |
843 | } |
844 | ||
bf8d5d52 RG |
845 | static inline enum mem_cgroup_protection mem_cgroup_protected( |
846 | struct mem_cgroup *root, struct mem_cgroup *memcg) | |
241994ed | 847 | { |
bf8d5d52 | 848 | return MEMCG_PROT_NONE; |
241994ed JW |
849 | } |
850 | ||
00501b53 JW |
851 | static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
852 | gfp_t gfp_mask, | |
3fba69a5 | 853 | struct mem_cgroup **memcgp) |
7a81b88c | 854 | { |
00501b53 | 855 | *memcgp = NULL; |
7a81b88c KH |
856 | return 0; |
857 | } | |
858 | ||
2cf85583 TH |
859 | static inline int mem_cgroup_try_charge_delay(struct page *page, |
860 | struct mm_struct *mm, | |
861 | gfp_t gfp_mask, | |
3fba69a5 | 862 | struct mem_cgroup **memcgp) |
2cf85583 TH |
863 | { |
864 | *memcgp = NULL; | |
865 | return 0; | |
866 | } | |
867 | ||
00501b53 JW |
868 | static inline void mem_cgroup_commit_charge(struct page *page, |
869 | struct mem_cgroup *memcg, | |
3fba69a5 | 870 | bool lrucare) |
7a81b88c KH |
871 | { |
872 | } | |
873 | ||
00501b53 | 874 | static inline void mem_cgroup_cancel_charge(struct page *page, |
3fba69a5 | 875 | struct mem_cgroup *memcg) |
7a81b88c KH |
876 | { |
877 | } | |
878 | ||
3fea5a49 JW |
879 | static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm, |
880 | gfp_t gfp_mask, bool lrucare) | |
881 | { | |
882 | return 0; | |
883 | } | |
884 | ||
0a31bc97 | 885 | static inline void mem_cgroup_uncharge(struct page *page) |
569b846d KH |
886 | { |
887 | } | |
888 | ||
747db954 | 889 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
8a9f3ccd BS |
890 | { |
891 | } | |
892 | ||
6a93ca8f | 893 | static inline void mem_cgroup_migrate(struct page *old, struct page *new) |
69029cd5 KH |
894 | { |
895 | } | |
896 | ||
867e5e1d JW |
897 | static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg, |
898 | struct pglist_data *pgdat) | |
08e552c6 | 899 | { |
867e5e1d | 900 | return &pgdat->__lruvec; |
08e552c6 KH |
901 | } |
902 | ||
fa9add64 | 903 | static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, |
599d0c95 | 904 | struct pglist_data *pgdat) |
66e1707b | 905 | { |
867e5e1d | 906 | return &pgdat->__lruvec; |
66e1707b BS |
907 | } |
908 | ||
b910718a JW |
909 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) |
910 | { | |
911 | return NULL; | |
912 | } | |
913 | ||
587af308 | 914 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
c0ff4b85 | 915 | struct mem_cgroup *memcg) |
bed7161a | 916 | { |
587af308 | 917 | return true; |
bed7161a BS |
918 | } |
919 | ||
d46eb14b SB |
920 | static inline struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm) |
921 | { | |
922 | return NULL; | |
923 | } | |
924 | ||
f745c6f5 SB |
925 | static inline struct mem_cgroup *get_mem_cgroup_from_page(struct page *page) |
926 | { | |
927 | return NULL; | |
928 | } | |
929 | ||
dc0b5864 RG |
930 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
931 | { | |
932 | } | |
933 | ||
5660048c JW |
934 | static inline struct mem_cgroup * |
935 | mem_cgroup_iter(struct mem_cgroup *root, | |
936 | struct mem_cgroup *prev, | |
937 | struct mem_cgroup_reclaim_cookie *reclaim) | |
938 | { | |
939 | return NULL; | |
940 | } | |
941 | ||
942 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
943 | struct mem_cgroup *prev) | |
944 | { | |
945 | } | |
946 | ||
7c5f64f8 VD |
947 | static inline int mem_cgroup_scan_tasks(struct mem_cgroup *memcg, |
948 | int (*fn)(struct task_struct *, void *), void *arg) | |
949 | { | |
950 | return 0; | |
951 | } | |
952 | ||
23047a96 | 953 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
f8d66542 | 954 | { |
23047a96 JW |
955 | return 0; |
956 | } | |
957 | ||
958 | static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id) | |
959 | { | |
960 | WARN_ON_ONCE(id); | |
961 | /* XXX: This should always return root_mem_cgroup */ | |
962 | return NULL; | |
f8d66542 | 963 | } |
a636b327 | 964 | |
aa9694bb CD |
965 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
966 | { | |
967 | return NULL; | |
968 | } | |
969 | ||
2262185c RG |
970 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
971 | { | |
972 | return NULL; | |
973 | } | |
974 | ||
eb01aaab | 975 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
14797e23 | 976 | { |
13308ca9 | 977 | return true; |
14797e23 KM |
978 | } |
979 | ||
b4536f0c MH |
980 | static inline |
981 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
982 | enum lru_list lru, int zone_idx) | |
983 | { | |
984 | return 0; | |
985 | } | |
a3d8e054 | 986 | |
bbec2e15 | 987 | static inline unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg) |
7c5f64f8 VD |
988 | { |
989 | return 0; | |
990 | } | |
991 | ||
9783aa99 CD |
992 | static inline unsigned long mem_cgroup_size(struct mem_cgroup *memcg) |
993 | { | |
994 | return 0; | |
995 | } | |
996 | ||
e222432b | 997 | static inline void |
f0c867d9 | 998 | mem_cgroup_print_oom_context(struct mem_cgroup *memcg, struct task_struct *p) |
999 | { | |
1000 | } | |
1001 | ||
1002 | static inline void | |
1003 | mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg) | |
e222432b BS |
1004 | { |
1005 | } | |
1006 | ||
739f79fc JW |
1007 | static inline struct mem_cgroup *lock_page_memcg(struct page *page) |
1008 | { | |
1009 | return NULL; | |
1010 | } | |
1011 | ||
1012 | static inline void __unlock_page_memcg(struct mem_cgroup *memcg) | |
89c06bd5 KH |
1013 | { |
1014 | } | |
1015 | ||
62cccb8c | 1016 | static inline void unlock_page_memcg(struct page *page) |
89c06bd5 KH |
1017 | { |
1018 | } | |
1019 | ||
b23afb93 TH |
1020 | static inline void mem_cgroup_handle_over_high(void) |
1021 | { | |
1022 | } | |
1023 | ||
29ef680a | 1024 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 JW |
1025 | { |
1026 | } | |
1027 | ||
29ef680a | 1028 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 JW |
1029 | { |
1030 | } | |
1031 | ||
3812c8c8 JW |
1032 | static inline bool task_in_memcg_oom(struct task_struct *p) |
1033 | { | |
1034 | return false; | |
1035 | } | |
1036 | ||
49426420 | 1037 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
3812c8c8 JW |
1038 | { |
1039 | return false; | |
1040 | } | |
1041 | ||
3d8b38eb RG |
1042 | static inline struct mem_cgroup *mem_cgroup_get_oom_group( |
1043 | struct task_struct *victim, struct mem_cgroup *oom_domain) | |
1044 | { | |
1045 | return NULL; | |
1046 | } | |
1047 | ||
1048 | static inline void mem_cgroup_print_oom_group(struct mem_cgroup *memcg) | |
1049 | { | |
1050 | } | |
1051 | ||
42a30035 JW |
1052 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx) |
1053 | { | |
1054 | return 0; | |
1055 | } | |
1056 | ||
205b20cc JW |
1057 | static inline unsigned long memcg_page_state_local(struct mem_cgroup *memcg, |
1058 | int idx) | |
2a2e4885 JW |
1059 | { |
1060 | return 0; | |
1061 | } | |
1062 | ||
00f3ca2c | 1063 | static inline void __mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1064 | int idx, |
00f3ca2c | 1065 | int nr) |
2a2e4885 JW |
1066 | { |
1067 | } | |
1068 | ||
00f3ca2c | 1069 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1070 | int idx, |
00f3ca2c | 1071 | int nr) |
2a2e4885 JW |
1072 | { |
1073 | } | |
1074 | ||
00f3ca2c | 1075 | static inline void __mod_memcg_page_state(struct page *page, |
04fecbf5 | 1076 | int idx, |
00f3ca2c | 1077 | int nr) |
2a2e4885 JW |
1078 | { |
1079 | } | |
1080 | ||
ccda7f43 | 1081 | static inline void mod_memcg_page_state(struct page *page, |
04fecbf5 | 1082 | int idx, |
ccda7f43 | 1083 | int nr) |
553af430 JW |
1084 | { |
1085 | } | |
1086 | ||
42a30035 JW |
1087 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
1088 | enum node_stat_item idx) | |
1089 | { | |
1090 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
1091 | } | |
1092 | ||
205b20cc JW |
1093 | static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
1094 | enum node_stat_item idx) | |
2a7106f2 | 1095 | { |
00f3ca2c | 1096 | return node_page_state(lruvec_pgdat(lruvec), idx); |
2a7106f2 GT |
1097 | } |
1098 | ||
00f3ca2c JW |
1099 | static inline void __mod_lruvec_state(struct lruvec *lruvec, |
1100 | enum node_stat_item idx, int val) | |
d69b042f | 1101 | { |
00f3ca2c JW |
1102 | __mod_node_page_state(lruvec_pgdat(lruvec), idx, val); |
1103 | } | |
1104 | ||
1105 | static inline void mod_lruvec_state(struct lruvec *lruvec, | |
1106 | enum node_stat_item idx, int val) | |
1107 | { | |
1108 | mod_node_page_state(lruvec_pgdat(lruvec), idx, val); | |
1109 | } | |
1110 | ||
1111 | static inline void __mod_lruvec_page_state(struct page *page, | |
1112 | enum node_stat_item idx, int val) | |
1113 | { | |
1114 | __mod_node_page_state(page_pgdat(page), idx, val); | |
1115 | } | |
1116 | ||
1117 | static inline void mod_lruvec_page_state(struct page *page, | |
1118 | enum node_stat_item idx, int val) | |
1119 | { | |
1120 | mod_node_page_state(page_pgdat(page), idx, val); | |
d69b042f BS |
1121 | } |
1122 | ||
ec9f0238 RG |
1123 | static inline void __mod_lruvec_slab_state(void *p, enum node_stat_item idx, |
1124 | int val) | |
1125 | { | |
1126 | struct page *page = virt_to_head_page(p); | |
1127 | ||
1128 | __mod_node_page_state(page_pgdat(page), idx, val); | |
1129 | } | |
1130 | ||
8380ce47 RG |
1131 | static inline void mod_memcg_obj_state(void *p, int idx, int val) |
1132 | { | |
1133 | } | |
1134 | ||
4e416953 | 1135 | static inline |
ef8f2327 | 1136 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
1137 | gfp_t gfp_mask, |
1138 | unsigned long *total_scanned) | |
4e416953 | 1139 | { |
0608f43d | 1140 | return 0; |
4e416953 BS |
1141 | } |
1142 | ||
e94c8a9c | 1143 | static inline void mem_cgroup_split_huge_fixup(struct page *head) |
ca3e0214 KH |
1144 | { |
1145 | } | |
1146 | ||
2262185c RG |
1147 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
1148 | enum vm_event_item idx, | |
1149 | unsigned long count) | |
1150 | { | |
1151 | } | |
1152 | ||
9851ac13 KT |
1153 | static inline void __count_memcg_events(struct mem_cgroup *memcg, |
1154 | enum vm_event_item idx, | |
1155 | unsigned long count) | |
1156 | { | |
1157 | } | |
1158 | ||
2262185c | 1159 | static inline void count_memcg_page_event(struct page *page, |
04fecbf5 | 1160 | int idx) |
2262185c RG |
1161 | { |
1162 | } | |
1163 | ||
456f998e | 1164 | static inline |
2262185c | 1165 | void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx) |
456f998e YH |
1166 | { |
1167 | } | |
c255a458 | 1168 | #endif /* CONFIG_MEMCG */ |
78fb7466 | 1169 | |
04fecbf5 | 1170 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1171 | static inline void __inc_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1172 | int idx) |
00f3ca2c JW |
1173 | { |
1174 | __mod_memcg_state(memcg, idx, 1); | |
1175 | } | |
1176 | ||
04fecbf5 | 1177 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1178 | static inline void __dec_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1179 | int idx) |
00f3ca2c JW |
1180 | { |
1181 | __mod_memcg_state(memcg, idx, -1); | |
1182 | } | |
1183 | ||
04fecbf5 | 1184 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1185 | static inline void __inc_memcg_page_state(struct page *page, |
04fecbf5 | 1186 | int idx) |
00f3ca2c JW |
1187 | { |
1188 | __mod_memcg_page_state(page, idx, 1); | |
1189 | } | |
1190 | ||
04fecbf5 | 1191 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1192 | static inline void __dec_memcg_page_state(struct page *page, |
04fecbf5 | 1193 | int idx) |
00f3ca2c JW |
1194 | { |
1195 | __mod_memcg_page_state(page, idx, -1); | |
1196 | } | |
1197 | ||
1198 | static inline void __inc_lruvec_state(struct lruvec *lruvec, | |
1199 | enum node_stat_item idx) | |
1200 | { | |
1201 | __mod_lruvec_state(lruvec, idx, 1); | |
1202 | } | |
1203 | ||
1204 | static inline void __dec_lruvec_state(struct lruvec *lruvec, | |
1205 | enum node_stat_item idx) | |
1206 | { | |
1207 | __mod_lruvec_state(lruvec, idx, -1); | |
1208 | } | |
1209 | ||
1210 | static inline void __inc_lruvec_page_state(struct page *page, | |
1211 | enum node_stat_item idx) | |
1212 | { | |
1213 | __mod_lruvec_page_state(page, idx, 1); | |
1214 | } | |
1215 | ||
1216 | static inline void __dec_lruvec_page_state(struct page *page, | |
1217 | enum node_stat_item idx) | |
1218 | { | |
1219 | __mod_lruvec_page_state(page, idx, -1); | |
1220 | } | |
1221 | ||
ec9f0238 RG |
1222 | static inline void __inc_lruvec_slab_state(void *p, enum node_stat_item idx) |
1223 | { | |
1224 | __mod_lruvec_slab_state(p, idx, 1); | |
1225 | } | |
1226 | ||
1227 | static inline void __dec_lruvec_slab_state(void *p, enum node_stat_item idx) | |
1228 | { | |
1229 | __mod_lruvec_slab_state(p, idx, -1); | |
1230 | } | |
1231 | ||
04fecbf5 | 1232 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1233 | static inline void inc_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1234 | int idx) |
00f3ca2c JW |
1235 | { |
1236 | mod_memcg_state(memcg, idx, 1); | |
1237 | } | |
1238 | ||
04fecbf5 | 1239 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1240 | static inline void dec_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1241 | int idx) |
00f3ca2c JW |
1242 | { |
1243 | mod_memcg_state(memcg, idx, -1); | |
1244 | } | |
1245 | ||
04fecbf5 | 1246 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1247 | static inline void inc_memcg_page_state(struct page *page, |
04fecbf5 | 1248 | int idx) |
00f3ca2c JW |
1249 | { |
1250 | mod_memcg_page_state(page, idx, 1); | |
1251 | } | |
1252 | ||
04fecbf5 | 1253 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1254 | static inline void dec_memcg_page_state(struct page *page, |
04fecbf5 | 1255 | int idx) |
00f3ca2c JW |
1256 | { |
1257 | mod_memcg_page_state(page, idx, -1); | |
1258 | } | |
1259 | ||
1260 | static inline void inc_lruvec_state(struct lruvec *lruvec, | |
1261 | enum node_stat_item idx) | |
1262 | { | |
1263 | mod_lruvec_state(lruvec, idx, 1); | |
1264 | } | |
1265 | ||
1266 | static inline void dec_lruvec_state(struct lruvec *lruvec, | |
1267 | enum node_stat_item idx) | |
1268 | { | |
1269 | mod_lruvec_state(lruvec, idx, -1); | |
1270 | } | |
1271 | ||
1272 | static inline void inc_lruvec_page_state(struct page *page, | |
1273 | enum node_stat_item idx) | |
1274 | { | |
1275 | mod_lruvec_page_state(page, idx, 1); | |
1276 | } | |
1277 | ||
1278 | static inline void dec_lruvec_page_state(struct page *page, | |
1279 | enum node_stat_item idx) | |
1280 | { | |
1281 | mod_lruvec_page_state(page, idx, -1); | |
1282 | } | |
1283 | ||
52ebea74 | 1284 | #ifdef CONFIG_CGROUP_WRITEBACK |
841710aa | 1285 | |
841710aa | 1286 | struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb); |
c5edf9cd TH |
1287 | void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages, |
1288 | unsigned long *pheadroom, unsigned long *pdirty, | |
1289 | unsigned long *pwriteback); | |
841710aa | 1290 | |
97b27821 TH |
1291 | void mem_cgroup_track_foreign_dirty_slowpath(struct page *page, |
1292 | struct bdi_writeback *wb); | |
1293 | ||
1294 | static inline void mem_cgroup_track_foreign_dirty(struct page *page, | |
1295 | struct bdi_writeback *wb) | |
1296 | { | |
08d1d0e6 BH |
1297 | if (mem_cgroup_disabled()) |
1298 | return; | |
1299 | ||
97b27821 TH |
1300 | if (unlikely(&page->mem_cgroup->css != wb->memcg_css)) |
1301 | mem_cgroup_track_foreign_dirty_slowpath(page, wb); | |
1302 | } | |
1303 | ||
1304 | void mem_cgroup_flush_foreign(struct bdi_writeback *wb); | |
1305 | ||
841710aa TH |
1306 | #else /* CONFIG_CGROUP_WRITEBACK */ |
1307 | ||
1308 | static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb) | |
1309 | { | |
1310 | return NULL; | |
1311 | } | |
1312 | ||
c2aa723a | 1313 | static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb, |
c5edf9cd TH |
1314 | unsigned long *pfilepages, |
1315 | unsigned long *pheadroom, | |
c2aa723a TH |
1316 | unsigned long *pdirty, |
1317 | unsigned long *pwriteback) | |
1318 | { | |
1319 | } | |
1320 | ||
97b27821 TH |
1321 | static inline void mem_cgroup_track_foreign_dirty(struct page *page, |
1322 | struct bdi_writeback *wb) | |
1323 | { | |
1324 | } | |
1325 | ||
1326 | static inline void mem_cgroup_flush_foreign(struct bdi_writeback *wb) | |
1327 | { | |
1328 | } | |
1329 | ||
841710aa | 1330 | #endif /* CONFIG_CGROUP_WRITEBACK */ |
52ebea74 | 1331 | |
e1aab161 | 1332 | struct sock; |
baac50bb JW |
1333 | bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); |
1334 | void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); | |
d886f4e4 | 1335 | #ifdef CONFIG_MEMCG |
ef12947c JW |
1336 | extern struct static_key_false memcg_sockets_enabled_key; |
1337 | #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key) | |
2d758073 JW |
1338 | void mem_cgroup_sk_alloc(struct sock *sk); |
1339 | void mem_cgroup_sk_free(struct sock *sk); | |
baac50bb | 1340 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c | 1341 | { |
0db15298 | 1342 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && memcg->tcpmem_pressure) |
8e8ae645 | 1343 | return true; |
8e8ae645 JW |
1344 | do { |
1345 | if (time_before(jiffies, memcg->socket_pressure)) | |
1346 | return true; | |
1347 | } while ((memcg = parent_mem_cgroup(memcg))); | |
1348 | return false; | |
e805605c | 1349 | } |
0a432dcb YS |
1350 | |
1351 | extern int memcg_expand_shrinker_maps(int new_id); | |
1352 | ||
1353 | extern void memcg_set_shrinker_bit(struct mem_cgroup *memcg, | |
1354 | int nid, int shrinker_id); | |
e805605c | 1355 | #else |
80e95fe0 | 1356 | #define mem_cgroup_sockets_enabled 0 |
2d758073 JW |
1357 | static inline void mem_cgroup_sk_alloc(struct sock *sk) { }; |
1358 | static inline void mem_cgroup_sk_free(struct sock *sk) { }; | |
baac50bb | 1359 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c JW |
1360 | { |
1361 | return false; | |
1362 | } | |
0a432dcb YS |
1363 | |
1364 | static inline void memcg_set_shrinker_bit(struct mem_cgroup *memcg, | |
1365 | int nid, int shrinker_id) | |
1366 | { | |
1367 | } | |
e805605c | 1368 | #endif |
7ae1e1d0 | 1369 | |
45264778 VD |
1370 | struct kmem_cache *memcg_kmem_get_cache(struct kmem_cache *cachep); |
1371 | void memcg_kmem_put_cache(struct kmem_cache *cachep); | |
9b6f7e16 RG |
1372 | |
1373 | #ifdef CONFIG_MEMCG_KMEM | |
4b13f64d RG |
1374 | int __memcg_kmem_charge(struct mem_cgroup *memcg, gfp_t gfp, |
1375 | unsigned int nr_pages); | |
1376 | void __memcg_kmem_uncharge(struct mem_cgroup *memcg, unsigned int nr_pages); | |
f4b00eab RG |
1377 | int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, int order); |
1378 | void __memcg_kmem_uncharge_page(struct page *page, int order); | |
45264778 | 1379 | |
ef12947c | 1380 | extern struct static_key_false memcg_kmem_enabled_key; |
17cc4dfe | 1381 | extern struct workqueue_struct *memcg_kmem_cache_wq; |
749c5415 | 1382 | |
dbcf73e2 | 1383 | extern int memcg_nr_cache_ids; |
64219994 MH |
1384 | void memcg_get_cache_ids(void); |
1385 | void memcg_put_cache_ids(void); | |
ebe945c2 GC |
1386 | |
1387 | /* | |
1388 | * Helper macro to loop through all memcg-specific caches. Callers must still | |
1389 | * check if the cache is valid (it is either valid or NULL). | |
1390 | * the slab_mutex must be held when looping through those caches | |
1391 | */ | |
749c5415 | 1392 | #define for_each_memcg_cache_index(_idx) \ |
dbcf73e2 | 1393 | for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++) |
749c5415 | 1394 | |
7ae1e1d0 GC |
1395 | static inline bool memcg_kmem_enabled(void) |
1396 | { | |
ef12947c | 1397 | return static_branch_unlikely(&memcg_kmem_enabled_key); |
7ae1e1d0 GC |
1398 | } |
1399 | ||
f4b00eab RG |
1400 | static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1401 | int order) | |
60cd4bcd SB |
1402 | { |
1403 | if (memcg_kmem_enabled()) | |
f4b00eab | 1404 | return __memcg_kmem_charge_page(page, gfp, order); |
60cd4bcd SB |
1405 | return 0; |
1406 | } | |
1407 | ||
f4b00eab | 1408 | static inline void memcg_kmem_uncharge_page(struct page *page, int order) |
60cd4bcd SB |
1409 | { |
1410 | if (memcg_kmem_enabled()) | |
f4b00eab | 1411 | __memcg_kmem_uncharge_page(page, order); |
60cd4bcd SB |
1412 | } |
1413 | ||
4b13f64d RG |
1414 | static inline int memcg_kmem_charge(struct mem_cgroup *memcg, gfp_t gfp, |
1415 | unsigned int nr_pages) | |
60cd4bcd SB |
1416 | { |
1417 | if (memcg_kmem_enabled()) | |
4b13f64d | 1418 | return __memcg_kmem_charge(memcg, gfp, nr_pages); |
60cd4bcd SB |
1419 | return 0; |
1420 | } | |
49a18eae | 1421 | |
4b13f64d RG |
1422 | static inline void memcg_kmem_uncharge(struct mem_cgroup *memcg, |
1423 | unsigned int nr_pages) | |
49a18eae RG |
1424 | { |
1425 | if (memcg_kmem_enabled()) | |
4b13f64d | 1426 | __memcg_kmem_uncharge(memcg, nr_pages); |
49a18eae RG |
1427 | } |
1428 | ||
33398cf2 | 1429 | /* |
9f706d68 | 1430 | * helper for accessing a memcg's index. It will be used as an index in the |
33398cf2 MH |
1431 | * child cache array in kmem_cache, and also to derive its name. This function |
1432 | * will return -1 when this is not a kmem-limited memcg. | |
1433 | */ | |
1434 | static inline int memcg_cache_id(struct mem_cgroup *memcg) | |
1435 | { | |
1436 | return memcg ? memcg->kmemcg_id : -1; | |
1437 | } | |
5722d094 | 1438 | |
8380ce47 RG |
1439 | struct mem_cgroup *mem_cgroup_from_obj(void *p); |
1440 | ||
7ae1e1d0 | 1441 | #else |
9b6f7e16 | 1442 | |
f4b00eab RG |
1443 | static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1444 | int order) | |
9b6f7e16 RG |
1445 | { |
1446 | return 0; | |
1447 | } | |
1448 | ||
f4b00eab | 1449 | static inline void memcg_kmem_uncharge_page(struct page *page, int order) |
9b6f7e16 RG |
1450 | { |
1451 | } | |
1452 | ||
f4b00eab RG |
1453 | static inline int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1454 | int order) | |
60cd4bcd SB |
1455 | { |
1456 | return 0; | |
1457 | } | |
1458 | ||
f4b00eab | 1459 | static inline void __memcg_kmem_uncharge_page(struct page *page, int order) |
60cd4bcd SB |
1460 | { |
1461 | } | |
1462 | ||
749c5415 GC |
1463 | #define for_each_memcg_cache_index(_idx) \ |
1464 | for (; NULL; ) | |
1465 | ||
b9ce5ef4 GC |
1466 | static inline bool memcg_kmem_enabled(void) |
1467 | { | |
1468 | return false; | |
1469 | } | |
1470 | ||
2633d7a0 GC |
1471 | static inline int memcg_cache_id(struct mem_cgroup *memcg) |
1472 | { | |
1473 | return -1; | |
1474 | } | |
1475 | ||
05257a1a VD |
1476 | static inline void memcg_get_cache_ids(void) |
1477 | { | |
1478 | } | |
1479 | ||
1480 | static inline void memcg_put_cache_ids(void) | |
1481 | { | |
1482 | } | |
1483 | ||
8380ce47 RG |
1484 | static inline struct mem_cgroup *mem_cgroup_from_obj(void *p) |
1485 | { | |
1486 | return NULL; | |
1487 | } | |
1488 | ||
84c07d11 | 1489 | #endif /* CONFIG_MEMCG_KMEM */ |
127424c8 | 1490 | |
8cdea7c0 | 1491 | #endif /* _LINUX_MEMCONTROL_H */ |