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8cdea7c0 BS |
1 | /* memcontrol.h - Memory Controller |
2 | * | |
3 | * Copyright IBM Corporation, 2007 | |
4 | * Author Balbir Singh <balbir@linux.vnet.ibm.com> | |
5 | * | |
78fb7466 PE |
6 | * Copyright 2007 OpenVZ SWsoft Inc |
7 | * Author: Pavel Emelianov <xemul@openvz.org> | |
8 | * | |
8cdea7c0 BS |
9 | * This program is free software; you can redistribute it and/or modify |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | */ | |
19 | ||
20 | #ifndef _LINUX_MEMCONTROL_H | |
21 | #define _LINUX_MEMCONTROL_H | |
f8d66542 | 22 | #include <linux/cgroup.h> |
456f998e | 23 | #include <linux/vm_event_item.h> |
7ae1e1d0 | 24 | #include <linux/hardirq.h> |
a8964b9b | 25 | #include <linux/jump_label.h> |
33398cf2 MH |
26 | #include <linux/page_counter.h> |
27 | #include <linux/vmpressure.h> | |
28 | #include <linux/eventfd.h> | |
00f3ca2c JW |
29 | #include <linux/mm.h> |
30 | #include <linux/vmstat.h> | |
33398cf2 | 31 | #include <linux/writeback.h> |
fdf1cdb9 | 32 | #include <linux/page-flags.h> |
456f998e | 33 | |
78fb7466 | 34 | struct mem_cgroup; |
8697d331 BS |
35 | struct page; |
36 | struct mm_struct; | |
2633d7a0 | 37 | struct kmem_cache; |
78fb7466 | 38 | |
71cd3113 JW |
39 | /* Cgroup-specific page state, on top of universal node page state */ |
40 | enum memcg_stat_item { | |
41 | MEMCG_CACHE = NR_VM_NODE_STAT_ITEMS, | |
42 | MEMCG_RSS, | |
43 | MEMCG_RSS_HUGE, | |
44 | MEMCG_SWAP, | |
45 | MEMCG_SOCK, | |
46 | /* XXX: why are these zone and not node counters? */ | |
47 | MEMCG_KERNEL_STACK_KB, | |
b2807f07 | 48 | MEMCG_NR_STAT, |
2a7106f2 GT |
49 | }; |
50 | ||
e27be240 JW |
51 | enum memcg_memory_event { |
52 | MEMCG_LOW, | |
71cd3113 JW |
53 | MEMCG_HIGH, |
54 | MEMCG_MAX, | |
55 | MEMCG_OOM, | |
fe6bdfc8 | 56 | MEMCG_OOM_KILL, |
f3a53a3a TH |
57 | MEMCG_SWAP_MAX, |
58 | MEMCG_SWAP_FAIL, | |
e27be240 | 59 | MEMCG_NR_MEMORY_EVENTS, |
71cd3113 JW |
60 | }; |
61 | ||
bf8d5d52 RG |
62 | enum mem_cgroup_protection { |
63 | MEMCG_PROT_NONE, | |
64 | MEMCG_PROT_LOW, | |
65 | MEMCG_PROT_MIN, | |
66 | }; | |
67 | ||
5660048c | 68 | struct mem_cgroup_reclaim_cookie { |
ef8f2327 | 69 | pg_data_t *pgdat; |
5660048c JW |
70 | int priority; |
71 | unsigned int generation; | |
72 | }; | |
73 | ||
71cd3113 JW |
74 | #ifdef CONFIG_MEMCG |
75 | ||
76 | #define MEM_CGROUP_ID_SHIFT 16 | |
77 | #define MEM_CGROUP_ID_MAX USHRT_MAX | |
78 | ||
79 | struct mem_cgroup_id { | |
80 | int id; | |
81 | atomic_t ref; | |
82 | }; | |
83 | ||
33398cf2 MH |
84 | /* |
85 | * Per memcg event counter is incremented at every pagein/pageout. With THP, | |
86 | * it will be incremated by the number of pages. This counter is used for | |
87 | * for trigger some periodic events. This is straightforward and better | |
88 | * than using jiffies etc. to handle periodic memcg event. | |
89 | */ | |
90 | enum mem_cgroup_events_target { | |
91 | MEM_CGROUP_TARGET_THRESH, | |
92 | MEM_CGROUP_TARGET_SOFTLIMIT, | |
93 | MEM_CGROUP_TARGET_NUMAINFO, | |
94 | MEM_CGROUP_NTARGETS, | |
95 | }; | |
96 | ||
33398cf2 | 97 | struct mem_cgroup_stat_cpu { |
b2807f07 | 98 | long count[MEMCG_NR_STAT]; |
e27be240 | 99 | unsigned long events[NR_VM_EVENT_ITEMS]; |
33398cf2 MH |
100 | unsigned long nr_page_events; |
101 | unsigned long targets[MEM_CGROUP_NTARGETS]; | |
102 | }; | |
103 | ||
104 | struct mem_cgroup_reclaim_iter { | |
105 | struct mem_cgroup *position; | |
106 | /* scan generation, increased every round-trip */ | |
107 | unsigned int generation; | |
108 | }; | |
109 | ||
00f3ca2c JW |
110 | struct lruvec_stat { |
111 | long count[NR_VM_NODE_STAT_ITEMS]; | |
112 | }; | |
113 | ||
33398cf2 MH |
114 | /* |
115 | * per-zone information in memory controller. | |
116 | */ | |
ef8f2327 | 117 | struct mem_cgroup_per_node { |
33398cf2 | 118 | struct lruvec lruvec; |
a983b5eb JW |
119 | |
120 | struct lruvec_stat __percpu *lruvec_stat_cpu; | |
121 | atomic_long_t lruvec_stat[NR_VM_NODE_STAT_ITEMS]; | |
122 | ||
b4536f0c | 123 | unsigned long lru_zone_size[MAX_NR_ZONES][NR_LRU_LISTS]; |
33398cf2 MH |
124 | |
125 | struct mem_cgroup_reclaim_iter iter[DEF_PRIORITY + 1]; | |
126 | ||
127 | struct rb_node tree_node; /* RB tree node */ | |
128 | unsigned long usage_in_excess;/* Set to the value by which */ | |
129 | /* the soft limit is exceeded*/ | |
130 | bool on_tree; | |
e3c1ac58 AR |
131 | bool congested; /* memcg has many dirty pages */ |
132 | /* backed by a congested BDI */ | |
133 | ||
33398cf2 MH |
134 | struct mem_cgroup *memcg; /* Back pointer, we cannot */ |
135 | /* use container_of */ | |
136 | }; | |
137 | ||
33398cf2 MH |
138 | struct mem_cgroup_threshold { |
139 | struct eventfd_ctx *eventfd; | |
140 | unsigned long threshold; | |
141 | }; | |
142 | ||
143 | /* For threshold */ | |
144 | struct mem_cgroup_threshold_ary { | |
145 | /* An array index points to threshold just below or equal to usage. */ | |
146 | int current_threshold; | |
147 | /* Size of entries[] */ | |
148 | unsigned int size; | |
149 | /* Array of thresholds */ | |
150 | struct mem_cgroup_threshold entries[0]; | |
151 | }; | |
152 | ||
153 | struct mem_cgroup_thresholds { | |
154 | /* Primary thresholds array */ | |
155 | struct mem_cgroup_threshold_ary *primary; | |
156 | /* | |
157 | * Spare threshold array. | |
158 | * This is needed to make mem_cgroup_unregister_event() "never fail". | |
159 | * It must be able to store at least primary->size - 1 entries. | |
160 | */ | |
161 | struct mem_cgroup_threshold_ary *spare; | |
162 | }; | |
163 | ||
567e9ab2 JW |
164 | enum memcg_kmem_state { |
165 | KMEM_NONE, | |
166 | KMEM_ALLOCATED, | |
167 | KMEM_ONLINE, | |
168 | }; | |
169 | ||
e81bf979 AL |
170 | #if defined(CONFIG_SMP) |
171 | struct memcg_padding { | |
172 | char x[0]; | |
173 | } ____cacheline_internodealigned_in_smp; | |
174 | #define MEMCG_PADDING(name) struct memcg_padding name; | |
175 | #else | |
176 | #define MEMCG_PADDING(name) | |
177 | #endif | |
178 | ||
33398cf2 MH |
179 | /* |
180 | * The memory controller data structure. The memory controller controls both | |
181 | * page cache and RSS per cgroup. We would eventually like to provide | |
182 | * statistics based on the statistics developed by Rik Van Riel for clock-pro, | |
183 | * to help the administrator determine what knobs to tune. | |
184 | */ | |
185 | struct mem_cgroup { | |
186 | struct cgroup_subsys_state css; | |
187 | ||
73f576c0 JW |
188 | /* Private memcg ID. Used to ID objects that outlive the cgroup */ |
189 | struct mem_cgroup_id id; | |
190 | ||
33398cf2 MH |
191 | /* Accounted resources */ |
192 | struct page_counter memory; | |
37e84351 | 193 | struct page_counter swap; |
0db15298 JW |
194 | |
195 | /* Legacy consumer-oriented counters */ | |
33398cf2 MH |
196 | struct page_counter memsw; |
197 | struct page_counter kmem; | |
0db15298 | 198 | struct page_counter tcpmem; |
33398cf2 | 199 | |
23067153 | 200 | /* Upper bound of normal memory consumption range */ |
33398cf2 MH |
201 | unsigned long high; |
202 | ||
f7e1cb6e JW |
203 | /* Range enforcement for interrupt charges */ |
204 | struct work_struct high_work; | |
205 | ||
33398cf2 MH |
206 | unsigned long soft_limit; |
207 | ||
208 | /* vmpressure notifications */ | |
209 | struct vmpressure vmpressure; | |
210 | ||
33398cf2 MH |
211 | /* |
212 | * Should the accounting and control be hierarchical, per subtree? | |
213 | */ | |
214 | bool use_hierarchy; | |
215 | ||
216 | /* protected by memcg_oom_lock */ | |
217 | bool oom_lock; | |
218 | int under_oom; | |
219 | ||
220 | int swappiness; | |
221 | /* OOM-Killer disable */ | |
222 | int oom_kill_disable; | |
223 | ||
e27be240 | 224 | /* memory.events */ |
472912a2 TH |
225 | struct cgroup_file events_file; |
226 | ||
f3a53a3a TH |
227 | /* handle for "memory.swap.events" */ |
228 | struct cgroup_file swap_events_file; | |
229 | ||
33398cf2 MH |
230 | /* protect arrays of thresholds */ |
231 | struct mutex thresholds_lock; | |
232 | ||
233 | /* thresholds for memory usage. RCU-protected */ | |
234 | struct mem_cgroup_thresholds thresholds; | |
235 | ||
236 | /* thresholds for mem+swap usage. RCU-protected */ | |
237 | struct mem_cgroup_thresholds memsw_thresholds; | |
238 | ||
239 | /* For oom notifier event fd */ | |
240 | struct list_head oom_notify; | |
241 | ||
242 | /* | |
243 | * Should we move charges of a task when a task is moved into this | |
244 | * mem_cgroup ? And what type of charges should we move ? | |
245 | */ | |
246 | unsigned long move_charge_at_immigrate; | |
e81bf979 AL |
247 | /* taken only while moving_account > 0 */ |
248 | spinlock_t move_lock; | |
249 | unsigned long move_lock_flags; | |
250 | ||
251 | MEMCG_PADDING(_pad1_); | |
252 | ||
33398cf2 MH |
253 | /* |
254 | * set > 0 if pages under this cgroup are moving to other cgroup. | |
255 | */ | |
256 | atomic_t moving_account; | |
33398cf2 | 257 | struct task_struct *move_lock_task; |
a983b5eb | 258 | |
e27be240 | 259 | /* memory.stat */ |
a983b5eb | 260 | struct mem_cgroup_stat_cpu __percpu *stat_cpu; |
e81bf979 AL |
261 | |
262 | MEMCG_PADDING(_pad2_); | |
263 | ||
a983b5eb | 264 | atomic_long_t stat[MEMCG_NR_STAT]; |
e27be240 | 265 | atomic_long_t events[NR_VM_EVENT_ITEMS]; |
e81bf979 | 266 | atomic_long_t memory_events[MEMCG_NR_MEMORY_EVENTS]; |
33398cf2 | 267 | |
d886f4e4 JW |
268 | unsigned long socket_pressure; |
269 | ||
270 | /* Legacy tcp memory accounting */ | |
0db15298 JW |
271 | bool tcpmem_active; |
272 | int tcpmem_pressure; | |
d886f4e4 | 273 | |
127424c8 | 274 | #ifndef CONFIG_SLOB |
33398cf2 MH |
275 | /* Index in the kmem_cache->memcg_params.memcg_caches array */ |
276 | int kmemcg_id; | |
567e9ab2 | 277 | enum memcg_kmem_state kmem_state; |
bc2791f8 | 278 | struct list_head kmem_caches; |
33398cf2 MH |
279 | #endif |
280 | ||
281 | int last_scanned_node; | |
282 | #if MAX_NUMNODES > 1 | |
283 | nodemask_t scan_nodes; | |
284 | atomic_t numainfo_events; | |
285 | atomic_t numainfo_updating; | |
286 | #endif | |
287 | ||
288 | #ifdef CONFIG_CGROUP_WRITEBACK | |
289 | struct list_head cgwb_list; | |
290 | struct wb_domain cgwb_domain; | |
291 | #endif | |
292 | ||
293 | /* List of events which userspace want to receive */ | |
294 | struct list_head event_list; | |
295 | spinlock_t event_list_lock; | |
296 | ||
297 | struct mem_cgroup_per_node *nodeinfo[0]; | |
298 | /* WARNING: nodeinfo must be the last member here */ | |
299 | }; | |
7d828602 | 300 | |
a983b5eb JW |
301 | /* |
302 | * size of first charge trial. "32" comes from vmscan.c's magic value. | |
303 | * TODO: maybe necessary to use big numbers in big irons. | |
304 | */ | |
305 | #define MEMCG_CHARGE_BATCH 32U | |
306 | ||
7d828602 | 307 | extern struct mem_cgroup *root_mem_cgroup; |
56161634 | 308 | |
23047a96 JW |
309 | static inline bool mem_cgroup_disabled(void) |
310 | { | |
311 | return !cgroup_subsys_enabled(memory_cgrp_subsys); | |
312 | } | |
313 | ||
bf8d5d52 RG |
314 | enum mem_cgroup_protection mem_cgroup_protected(struct mem_cgroup *root, |
315 | struct mem_cgroup *memcg); | |
241994ed | 316 | |
00501b53 | 317 | int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
f627c2f5 KS |
318 | gfp_t gfp_mask, struct mem_cgroup **memcgp, |
319 | bool compound); | |
2cf85583 TH |
320 | int mem_cgroup_try_charge_delay(struct page *page, struct mm_struct *mm, |
321 | gfp_t gfp_mask, struct mem_cgroup **memcgp, | |
322 | bool compound); | |
00501b53 | 323 | void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg, |
f627c2f5 KS |
324 | bool lrucare, bool compound); |
325 | void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg, | |
326 | bool compound); | |
0a31bc97 | 327 | void mem_cgroup_uncharge(struct page *page); |
747db954 | 328 | void mem_cgroup_uncharge_list(struct list_head *page_list); |
569b846d | 329 | |
6a93ca8f | 330 | void mem_cgroup_migrate(struct page *oldpage, struct page *newpage); |
569b846d | 331 | |
ef8f2327 MG |
332 | static struct mem_cgroup_per_node * |
333 | mem_cgroup_nodeinfo(struct mem_cgroup *memcg, int nid) | |
55779ec7 | 334 | { |
ef8f2327 | 335 | return memcg->nodeinfo[nid]; |
55779ec7 JW |
336 | } |
337 | ||
338 | /** | |
a9dd0a83 MG |
339 | * mem_cgroup_lruvec - get the lru list vector for a node or a memcg zone |
340 | * @node: node of the wanted lruvec | |
55779ec7 JW |
341 | * @memcg: memcg of the wanted lruvec |
342 | * | |
a9dd0a83 MG |
343 | * Returns the lru list vector holding pages for a given @node or a given |
344 | * @memcg and @zone. This can be the node lruvec, if the memory controller | |
55779ec7 JW |
345 | * is disabled. |
346 | */ | |
a9dd0a83 | 347 | static inline struct lruvec *mem_cgroup_lruvec(struct pglist_data *pgdat, |
ef8f2327 | 348 | struct mem_cgroup *memcg) |
55779ec7 | 349 | { |
ef8f2327 | 350 | struct mem_cgroup_per_node *mz; |
55779ec7 JW |
351 | struct lruvec *lruvec; |
352 | ||
353 | if (mem_cgroup_disabled()) { | |
a9dd0a83 | 354 | lruvec = node_lruvec(pgdat); |
55779ec7 JW |
355 | goto out; |
356 | } | |
357 | ||
ef8f2327 | 358 | mz = mem_cgroup_nodeinfo(memcg, pgdat->node_id); |
55779ec7 JW |
359 | lruvec = &mz->lruvec; |
360 | out: | |
361 | /* | |
362 | * Since a node can be onlined after the mem_cgroup was created, | |
599d0c95 | 363 | * we have to be prepared to initialize lruvec->pgdat here; |
55779ec7 JW |
364 | * and if offlined then reonlined, we need to reinitialize it. |
365 | */ | |
ef8f2327 MG |
366 | if (unlikely(lruvec->pgdat != pgdat)) |
367 | lruvec->pgdat = pgdat; | |
55779ec7 JW |
368 | return lruvec; |
369 | } | |
370 | ||
599d0c95 | 371 | struct lruvec *mem_cgroup_page_lruvec(struct page *, struct pglist_data *); |
c9b0ed51 | 372 | |
2314b42d | 373 | bool task_in_mem_cgroup(struct task_struct *task, struct mem_cgroup *memcg); |
64219994 | 374 | struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
e993d905 | 375 | |
33398cf2 MH |
376 | static inline |
377 | struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){ | |
378 | return css ? container_of(css, struct mem_cgroup, css) : NULL; | |
379 | } | |
380 | ||
8e8ae645 JW |
381 | #define mem_cgroup_from_counter(counter, member) \ |
382 | container_of(counter, struct mem_cgroup, member) | |
383 | ||
33398cf2 MH |
384 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
385 | struct mem_cgroup *, | |
386 | struct mem_cgroup_reclaim_cookie *); | |
387 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); | |
7c5f64f8 VD |
388 | int mem_cgroup_scan_tasks(struct mem_cgroup *, |
389 | int (*)(struct task_struct *, void *), void *); | |
33398cf2 | 390 | |
23047a96 JW |
391 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
392 | { | |
393 | if (mem_cgroup_disabled()) | |
394 | return 0; | |
395 | ||
73f576c0 | 396 | return memcg->id.id; |
23047a96 | 397 | } |
73f576c0 | 398 | struct mem_cgroup *mem_cgroup_from_id(unsigned short id); |
23047a96 | 399 | |
2262185c RG |
400 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
401 | { | |
402 | struct mem_cgroup_per_node *mz; | |
403 | ||
404 | if (mem_cgroup_disabled()) | |
405 | return NULL; | |
406 | ||
407 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
408 | return mz->memcg; | |
409 | } | |
410 | ||
8e8ae645 JW |
411 | /** |
412 | * parent_mem_cgroup - find the accounting parent of a memcg | |
413 | * @memcg: memcg whose parent to find | |
414 | * | |
415 | * Returns the parent memcg, or NULL if this is the root or the memory | |
416 | * controller is in legacy no-hierarchy mode. | |
417 | */ | |
418 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) | |
419 | { | |
420 | if (!memcg->memory.parent) | |
421 | return NULL; | |
422 | return mem_cgroup_from_counter(memcg->memory.parent, memory); | |
423 | } | |
424 | ||
33398cf2 MH |
425 | static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, |
426 | struct mem_cgroup *root) | |
427 | { | |
428 | if (root == memcg) | |
429 | return true; | |
430 | if (!root->use_hierarchy) | |
431 | return false; | |
432 | return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup); | |
433 | } | |
e1aab161 | 434 | |
2314b42d JW |
435 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
436 | struct mem_cgroup *memcg) | |
2e4d4091 | 437 | { |
587af308 | 438 | struct mem_cgroup *task_memcg; |
413918bb | 439 | bool match = false; |
c3ac9a8a | 440 | |
2e4d4091 | 441 | rcu_read_lock(); |
587af308 | 442 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
413918bb | 443 | if (task_memcg) |
2314b42d | 444 | match = mem_cgroup_is_descendant(task_memcg, memcg); |
2e4d4091 | 445 | rcu_read_unlock(); |
c3ac9a8a | 446 | return match; |
2e4d4091 | 447 | } |
8a9f3ccd | 448 | |
64219994 | 449 | struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page); |
2fc04524 | 450 | ino_t page_cgroup_ino(struct page *page); |
d324236b | 451 | |
eb01aaab VD |
452 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
453 | { | |
454 | if (mem_cgroup_disabled()) | |
455 | return true; | |
456 | return !!(memcg->css.flags & CSS_ONLINE); | |
457 | } | |
458 | ||
58ae83db KH |
459 | /* |
460 | * For memory reclaim. | |
461 | */ | |
889976db | 462 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
33398cf2 MH |
463 | |
464 | void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, | |
b4536f0c | 465 | int zid, int nr_pages); |
33398cf2 | 466 | |
0a6b76dd VD |
467 | unsigned long mem_cgroup_node_nr_lru_pages(struct mem_cgroup *memcg, |
468 | int nid, unsigned int lru_mask); | |
469 | ||
33398cf2 MH |
470 | static inline |
471 | unsigned long mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru) | |
472 | { | |
ef8f2327 | 473 | struct mem_cgroup_per_node *mz; |
b4536f0c MH |
474 | unsigned long nr_pages = 0; |
475 | int zid; | |
33398cf2 | 476 | |
ef8f2327 | 477 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); |
b4536f0c MH |
478 | for (zid = 0; zid < MAX_NR_ZONES; zid++) |
479 | nr_pages += mz->lru_zone_size[zid][lru]; | |
480 | return nr_pages; | |
481 | } | |
482 | ||
483 | static inline | |
484 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
485 | enum lru_list lru, int zone_idx) | |
486 | { | |
487 | struct mem_cgroup_per_node *mz; | |
488 | ||
489 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
490 | return mz->lru_zone_size[zone_idx][lru]; | |
33398cf2 MH |
491 | } |
492 | ||
b23afb93 TH |
493 | void mem_cgroup_handle_over_high(void); |
494 | ||
bbec2e15 | 495 | unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg); |
7c5f64f8 | 496 | |
64219994 MH |
497 | void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, |
498 | struct task_struct *p); | |
58ae83db | 499 | |
49426420 | 500 | static inline void mem_cgroup_oom_enable(void) |
519e5247 | 501 | { |
626ebc41 TH |
502 | WARN_ON(current->memcg_may_oom); |
503 | current->memcg_may_oom = 1; | |
519e5247 JW |
504 | } |
505 | ||
49426420 | 506 | static inline void mem_cgroup_oom_disable(void) |
519e5247 | 507 | { |
626ebc41 TH |
508 | WARN_ON(!current->memcg_may_oom); |
509 | current->memcg_may_oom = 0; | |
519e5247 JW |
510 | } |
511 | ||
3812c8c8 JW |
512 | static inline bool task_in_memcg_oom(struct task_struct *p) |
513 | { | |
626ebc41 | 514 | return p->memcg_in_oom; |
3812c8c8 JW |
515 | } |
516 | ||
49426420 | 517 | bool mem_cgroup_oom_synchronize(bool wait); |
3812c8c8 | 518 | |
c255a458 | 519 | #ifdef CONFIG_MEMCG_SWAP |
c077719b KH |
520 | extern int do_swap_account; |
521 | #endif | |
f8d66542 | 522 | |
739f79fc JW |
523 | struct mem_cgroup *lock_page_memcg(struct page *page); |
524 | void __unlock_page_memcg(struct mem_cgroup *memcg); | |
62cccb8c | 525 | void unlock_page_memcg(struct page *page); |
d7365e78 | 526 | |
04fecbf5 | 527 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
ccda7f43 | 528 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, |
04fecbf5 | 529 | int idx) |
2a2e4885 | 530 | { |
a983b5eb JW |
531 | long x = atomic_long_read(&memcg->stat[idx]); |
532 | #ifdef CONFIG_SMP | |
533 | if (x < 0) | |
534 | x = 0; | |
535 | #endif | |
536 | return x; | |
2a2e4885 JW |
537 | } |
538 | ||
04fecbf5 | 539 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 540 | static inline void __mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 541 | int idx, int val) |
2a2e4885 | 542 | { |
a983b5eb JW |
543 | long x; |
544 | ||
545 | if (mem_cgroup_disabled()) | |
546 | return; | |
547 | ||
548 | x = val + __this_cpu_read(memcg->stat_cpu->count[idx]); | |
549 | if (unlikely(abs(x) > MEMCG_CHARGE_BATCH)) { | |
550 | atomic_long_add(x, &memcg->stat[idx]); | |
551 | x = 0; | |
552 | } | |
553 | __this_cpu_write(memcg->stat_cpu->count[idx], x); | |
2a2e4885 JW |
554 | } |
555 | ||
04fecbf5 | 556 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 557 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 558 | int idx, int val) |
2a2e4885 | 559 | { |
c3cc3911 JW |
560 | unsigned long flags; |
561 | ||
562 | local_irq_save(flags); | |
a983b5eb | 563 | __mod_memcg_state(memcg, idx, val); |
c3cc3911 | 564 | local_irq_restore(flags); |
2a2e4885 JW |
565 | } |
566 | ||
33398cf2 | 567 | /** |
ccda7f43 | 568 | * mod_memcg_page_state - update page state statistics |
62cccb8c | 569 | * @page: the page |
33398cf2 MH |
570 | * @idx: page state item to account |
571 | * @val: number of pages (positive or negative) | |
572 | * | |
fdf1cdb9 JW |
573 | * The @page must be locked or the caller must use lock_page_memcg() |
574 | * to prevent double accounting when the page is concurrently being | |
575 | * moved to another memcg: | |
81f8c3a4 | 576 | * |
fdf1cdb9 | 577 | * lock_page(page) or lock_page_memcg(page) |
81f8c3a4 | 578 | * if (TestClearPageState(page)) |
ccda7f43 | 579 | * mod_memcg_page_state(page, state, -1); |
fdf1cdb9 | 580 | * unlock_page(page) or unlock_page_memcg(page) |
2a2e4885 JW |
581 | * |
582 | * Kernel pages are an exception to this, since they'll never move. | |
33398cf2 | 583 | */ |
00f3ca2c | 584 | static inline void __mod_memcg_page_state(struct page *page, |
04fecbf5 | 585 | int idx, int val) |
00f3ca2c JW |
586 | { |
587 | if (page->mem_cgroup) | |
588 | __mod_memcg_state(page->mem_cgroup, idx, val); | |
589 | } | |
590 | ||
ccda7f43 | 591 | static inline void mod_memcg_page_state(struct page *page, |
04fecbf5 | 592 | int idx, int val) |
33398cf2 | 593 | { |
62cccb8c | 594 | if (page->mem_cgroup) |
ccda7f43 | 595 | mod_memcg_state(page->mem_cgroup, idx, val); |
33398cf2 MH |
596 | } |
597 | ||
00f3ca2c JW |
598 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
599 | enum node_stat_item idx) | |
2a7106f2 | 600 | { |
00f3ca2c | 601 | struct mem_cgroup_per_node *pn; |
a983b5eb | 602 | long x; |
00f3ca2c JW |
603 | |
604 | if (mem_cgroup_disabled()) | |
605 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
606 | ||
607 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
a983b5eb JW |
608 | x = atomic_long_read(&pn->lruvec_stat[idx]); |
609 | #ifdef CONFIG_SMP | |
610 | if (x < 0) | |
611 | x = 0; | |
612 | #endif | |
613 | return x; | |
2a7106f2 GT |
614 | } |
615 | ||
00f3ca2c JW |
616 | static inline void __mod_lruvec_state(struct lruvec *lruvec, |
617 | enum node_stat_item idx, int val) | |
2a7106f2 | 618 | { |
00f3ca2c | 619 | struct mem_cgroup_per_node *pn; |
a983b5eb | 620 | long x; |
00f3ca2c | 621 | |
28454265 | 622 | /* Update node */ |
00f3ca2c | 623 | __mod_node_page_state(lruvec_pgdat(lruvec), idx, val); |
28454265 | 624 | |
00f3ca2c JW |
625 | if (mem_cgroup_disabled()) |
626 | return; | |
28454265 | 627 | |
00f3ca2c | 628 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); |
28454265 JW |
629 | |
630 | /* Update memcg */ | |
00f3ca2c | 631 | __mod_memcg_state(pn->memcg, idx, val); |
28454265 JW |
632 | |
633 | /* Update lruvec */ | |
a983b5eb JW |
634 | x = val + __this_cpu_read(pn->lruvec_stat_cpu->count[idx]); |
635 | if (unlikely(abs(x) > MEMCG_CHARGE_BATCH)) { | |
636 | atomic_long_add(x, &pn->lruvec_stat[idx]); | |
637 | x = 0; | |
638 | } | |
639 | __this_cpu_write(pn->lruvec_stat_cpu->count[idx], x); | |
00f3ca2c JW |
640 | } |
641 | ||
642 | static inline void mod_lruvec_state(struct lruvec *lruvec, | |
643 | enum node_stat_item idx, int val) | |
644 | { | |
c3cc3911 JW |
645 | unsigned long flags; |
646 | ||
647 | local_irq_save(flags); | |
28454265 | 648 | __mod_lruvec_state(lruvec, idx, val); |
c3cc3911 | 649 | local_irq_restore(flags); |
00f3ca2c JW |
650 | } |
651 | ||
652 | static inline void __mod_lruvec_page_state(struct page *page, | |
653 | enum node_stat_item idx, int val) | |
654 | { | |
28454265 JW |
655 | pg_data_t *pgdat = page_pgdat(page); |
656 | struct lruvec *lruvec; | |
00f3ca2c | 657 | |
28454265 JW |
658 | /* Untracked pages have no memcg, no lruvec. Update only the node */ |
659 | if (!page->mem_cgroup) { | |
660 | __mod_node_page_state(pgdat, idx, val); | |
00f3ca2c | 661 | return; |
28454265 JW |
662 | } |
663 | ||
664 | lruvec = mem_cgroup_lruvec(pgdat, page->mem_cgroup); | |
665 | __mod_lruvec_state(lruvec, idx, val); | |
00f3ca2c JW |
666 | } |
667 | ||
668 | static inline void mod_lruvec_page_state(struct page *page, | |
669 | enum node_stat_item idx, int val) | |
670 | { | |
c3cc3911 JW |
671 | unsigned long flags; |
672 | ||
673 | local_irq_save(flags); | |
28454265 | 674 | __mod_lruvec_page_state(page, idx, val); |
c3cc3911 | 675 | local_irq_restore(flags); |
2a7106f2 GT |
676 | } |
677 | ||
ef8f2327 | 678 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
679 | gfp_t gfp_mask, |
680 | unsigned long *total_scanned); | |
a63d83f4 | 681 | |
c9019e9b | 682 | static inline void __count_memcg_events(struct mem_cgroup *memcg, |
e27be240 JW |
683 | enum vm_event_item idx, |
684 | unsigned long count) | |
c9019e9b | 685 | { |
a983b5eb JW |
686 | unsigned long x; |
687 | ||
688 | if (mem_cgroup_disabled()) | |
689 | return; | |
690 | ||
691 | x = count + __this_cpu_read(memcg->stat_cpu->events[idx]); | |
692 | if (unlikely(x > MEMCG_CHARGE_BATCH)) { | |
693 | atomic_long_add(x, &memcg->events[idx]); | |
694 | x = 0; | |
695 | } | |
696 | __this_cpu_write(memcg->stat_cpu->events[idx], x); | |
c9019e9b JW |
697 | } |
698 | ||
2262185c | 699 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
e27be240 JW |
700 | enum vm_event_item idx, |
701 | unsigned long count) | |
2262185c | 702 | { |
c3cc3911 JW |
703 | unsigned long flags; |
704 | ||
705 | local_irq_save(flags); | |
a983b5eb | 706 | __count_memcg_events(memcg, idx, count); |
c3cc3911 | 707 | local_irq_restore(flags); |
2262185c RG |
708 | } |
709 | ||
710 | static inline void count_memcg_page_event(struct page *page, | |
e27be240 | 711 | enum vm_event_item idx) |
2262185c RG |
712 | { |
713 | if (page->mem_cgroup) | |
714 | count_memcg_events(page->mem_cgroup, idx, 1); | |
715 | } | |
716 | ||
717 | static inline void count_memcg_event_mm(struct mm_struct *mm, | |
718 | enum vm_event_item idx) | |
68ae564b | 719 | { |
33398cf2 MH |
720 | struct mem_cgroup *memcg; |
721 | ||
68ae564b DR |
722 | if (mem_cgroup_disabled()) |
723 | return; | |
33398cf2 MH |
724 | |
725 | rcu_read_lock(); | |
726 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
fe6bdfc8 | 727 | if (likely(memcg)) |
c9019e9b | 728 | count_memcg_events(memcg, idx, 1); |
33398cf2 | 729 | rcu_read_unlock(); |
68ae564b | 730 | } |
c9019e9b | 731 | |
e27be240 JW |
732 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
733 | enum memcg_memory_event event) | |
c9019e9b | 734 | { |
e27be240 | 735 | atomic_long_inc(&memcg->memory_events[event]); |
c9019e9b JW |
736 | cgroup_file_notify(&memcg->events_file); |
737 | } | |
738 | ||
fe6bdfc8 RG |
739 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
740 | enum memcg_memory_event event) | |
741 | { | |
742 | struct mem_cgroup *memcg; | |
743 | ||
744 | if (mem_cgroup_disabled()) | |
745 | return; | |
746 | ||
747 | rcu_read_lock(); | |
748 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
749 | if (likely(memcg)) | |
750 | memcg_memory_event(memcg, event); | |
751 | rcu_read_unlock(); | |
752 | } | |
753 | ||
ca3e0214 | 754 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
e94c8a9c | 755 | void mem_cgroup_split_huge_fixup(struct page *head); |
ca3e0214 KH |
756 | #endif |
757 | ||
c255a458 | 758 | #else /* CONFIG_MEMCG */ |
23047a96 JW |
759 | |
760 | #define MEM_CGROUP_ID_SHIFT 0 | |
761 | #define MEM_CGROUP_ID_MAX 0 | |
762 | ||
7a81b88c KH |
763 | struct mem_cgroup; |
764 | ||
23047a96 JW |
765 | static inline bool mem_cgroup_disabled(void) |
766 | { | |
767 | return true; | |
768 | } | |
769 | ||
e27be240 JW |
770 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
771 | enum memcg_memory_event event) | |
241994ed JW |
772 | { |
773 | } | |
774 | ||
fe6bdfc8 RG |
775 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
776 | enum memcg_memory_event event) | |
777 | { | |
778 | } | |
779 | ||
bf8d5d52 RG |
780 | static inline enum mem_cgroup_protection mem_cgroup_protected( |
781 | struct mem_cgroup *root, struct mem_cgroup *memcg) | |
241994ed | 782 | { |
bf8d5d52 | 783 | return MEMCG_PROT_NONE; |
241994ed JW |
784 | } |
785 | ||
00501b53 JW |
786 | static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
787 | gfp_t gfp_mask, | |
f627c2f5 KS |
788 | struct mem_cgroup **memcgp, |
789 | bool compound) | |
7a81b88c | 790 | { |
00501b53 | 791 | *memcgp = NULL; |
7a81b88c KH |
792 | return 0; |
793 | } | |
794 | ||
2cf85583 TH |
795 | static inline int mem_cgroup_try_charge_delay(struct page *page, |
796 | struct mm_struct *mm, | |
797 | gfp_t gfp_mask, | |
798 | struct mem_cgroup **memcgp, | |
799 | bool compound) | |
800 | { | |
801 | *memcgp = NULL; | |
802 | return 0; | |
803 | } | |
804 | ||
00501b53 JW |
805 | static inline void mem_cgroup_commit_charge(struct page *page, |
806 | struct mem_cgroup *memcg, | |
f627c2f5 | 807 | bool lrucare, bool compound) |
7a81b88c KH |
808 | { |
809 | } | |
810 | ||
00501b53 | 811 | static inline void mem_cgroup_cancel_charge(struct page *page, |
f627c2f5 KS |
812 | struct mem_cgroup *memcg, |
813 | bool compound) | |
7a81b88c KH |
814 | { |
815 | } | |
816 | ||
0a31bc97 | 817 | static inline void mem_cgroup_uncharge(struct page *page) |
569b846d KH |
818 | { |
819 | } | |
820 | ||
747db954 | 821 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
8a9f3ccd BS |
822 | { |
823 | } | |
824 | ||
6a93ca8f | 825 | static inline void mem_cgroup_migrate(struct page *old, struct page *new) |
69029cd5 KH |
826 | { |
827 | } | |
828 | ||
a9dd0a83 | 829 | static inline struct lruvec *mem_cgroup_lruvec(struct pglist_data *pgdat, |
ef8f2327 | 830 | struct mem_cgroup *memcg) |
08e552c6 | 831 | { |
a9dd0a83 | 832 | return node_lruvec(pgdat); |
08e552c6 KH |
833 | } |
834 | ||
fa9add64 | 835 | static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, |
599d0c95 | 836 | struct pglist_data *pgdat) |
66e1707b | 837 | { |
599d0c95 | 838 | return &pgdat->lruvec; |
66e1707b BS |
839 | } |
840 | ||
587af308 | 841 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
c0ff4b85 | 842 | struct mem_cgroup *memcg) |
bed7161a | 843 | { |
587af308 | 844 | return true; |
bed7161a BS |
845 | } |
846 | ||
ffbdccf5 DR |
847 | static inline bool task_in_mem_cgroup(struct task_struct *task, |
848 | const struct mem_cgroup *memcg) | |
4c4a2214 | 849 | { |
ffbdccf5 | 850 | return true; |
4c4a2214 DR |
851 | } |
852 | ||
5660048c JW |
853 | static inline struct mem_cgroup * |
854 | mem_cgroup_iter(struct mem_cgroup *root, | |
855 | struct mem_cgroup *prev, | |
856 | struct mem_cgroup_reclaim_cookie *reclaim) | |
857 | { | |
858 | return NULL; | |
859 | } | |
860 | ||
861 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
862 | struct mem_cgroup *prev) | |
863 | { | |
864 | } | |
865 | ||
7c5f64f8 VD |
866 | static inline int mem_cgroup_scan_tasks(struct mem_cgroup *memcg, |
867 | int (*fn)(struct task_struct *, void *), void *arg) | |
868 | { | |
869 | return 0; | |
870 | } | |
871 | ||
23047a96 | 872 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
f8d66542 | 873 | { |
23047a96 JW |
874 | return 0; |
875 | } | |
876 | ||
877 | static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id) | |
878 | { | |
879 | WARN_ON_ONCE(id); | |
880 | /* XXX: This should always return root_mem_cgroup */ | |
881 | return NULL; | |
f8d66542 | 882 | } |
a636b327 | 883 | |
2262185c RG |
884 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
885 | { | |
886 | return NULL; | |
887 | } | |
888 | ||
eb01aaab | 889 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
14797e23 | 890 | { |
13308ca9 | 891 | return true; |
14797e23 KM |
892 | } |
893 | ||
a3d8e054 | 894 | static inline unsigned long |
4d7dcca2 | 895 | mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru) |
a3d8e054 KM |
896 | { |
897 | return 0; | |
898 | } | |
b4536f0c MH |
899 | static inline |
900 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
901 | enum lru_list lru, int zone_idx) | |
902 | { | |
903 | return 0; | |
904 | } | |
a3d8e054 | 905 | |
0a6b76dd VD |
906 | static inline unsigned long |
907 | mem_cgroup_node_nr_lru_pages(struct mem_cgroup *memcg, | |
908 | int nid, unsigned int lru_mask) | |
909 | { | |
910 | return 0; | |
911 | } | |
912 | ||
bbec2e15 | 913 | static inline unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg) |
7c5f64f8 VD |
914 | { |
915 | return 0; | |
916 | } | |
917 | ||
e222432b BS |
918 | static inline void |
919 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) | |
920 | { | |
921 | } | |
922 | ||
739f79fc JW |
923 | static inline struct mem_cgroup *lock_page_memcg(struct page *page) |
924 | { | |
925 | return NULL; | |
926 | } | |
927 | ||
928 | static inline void __unlock_page_memcg(struct mem_cgroup *memcg) | |
89c06bd5 KH |
929 | { |
930 | } | |
931 | ||
62cccb8c | 932 | static inline void unlock_page_memcg(struct page *page) |
89c06bd5 KH |
933 | { |
934 | } | |
935 | ||
b23afb93 TH |
936 | static inline void mem_cgroup_handle_over_high(void) |
937 | { | |
938 | } | |
939 | ||
49426420 | 940 | static inline void mem_cgroup_oom_enable(void) |
519e5247 JW |
941 | { |
942 | } | |
943 | ||
49426420 | 944 | static inline void mem_cgroup_oom_disable(void) |
519e5247 JW |
945 | { |
946 | } | |
947 | ||
3812c8c8 JW |
948 | static inline bool task_in_memcg_oom(struct task_struct *p) |
949 | { | |
950 | return false; | |
951 | } | |
952 | ||
49426420 | 953 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
3812c8c8 JW |
954 | { |
955 | return false; | |
956 | } | |
957 | ||
ccda7f43 | 958 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, |
04fecbf5 | 959 | int idx) |
2a2e4885 JW |
960 | { |
961 | return 0; | |
962 | } | |
963 | ||
00f3ca2c | 964 | static inline void __mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 965 | int idx, |
00f3ca2c | 966 | int nr) |
2a2e4885 JW |
967 | { |
968 | } | |
969 | ||
00f3ca2c | 970 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 971 | int idx, |
00f3ca2c | 972 | int nr) |
2a2e4885 JW |
973 | { |
974 | } | |
975 | ||
00f3ca2c | 976 | static inline void __mod_memcg_page_state(struct page *page, |
04fecbf5 | 977 | int idx, |
00f3ca2c | 978 | int nr) |
2a2e4885 JW |
979 | { |
980 | } | |
981 | ||
ccda7f43 | 982 | static inline void mod_memcg_page_state(struct page *page, |
04fecbf5 | 983 | int idx, |
ccda7f43 | 984 | int nr) |
553af430 JW |
985 | { |
986 | } | |
987 | ||
00f3ca2c JW |
988 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
989 | enum node_stat_item idx) | |
2a7106f2 | 990 | { |
00f3ca2c | 991 | return node_page_state(lruvec_pgdat(lruvec), idx); |
2a7106f2 GT |
992 | } |
993 | ||
00f3ca2c JW |
994 | static inline void __mod_lruvec_state(struct lruvec *lruvec, |
995 | enum node_stat_item idx, int val) | |
d69b042f | 996 | { |
00f3ca2c JW |
997 | __mod_node_page_state(lruvec_pgdat(lruvec), idx, val); |
998 | } | |
999 | ||
1000 | static inline void mod_lruvec_state(struct lruvec *lruvec, | |
1001 | enum node_stat_item idx, int val) | |
1002 | { | |
1003 | mod_node_page_state(lruvec_pgdat(lruvec), idx, val); | |
1004 | } | |
1005 | ||
1006 | static inline void __mod_lruvec_page_state(struct page *page, | |
1007 | enum node_stat_item idx, int val) | |
1008 | { | |
1009 | __mod_node_page_state(page_pgdat(page), idx, val); | |
1010 | } | |
1011 | ||
1012 | static inline void mod_lruvec_page_state(struct page *page, | |
1013 | enum node_stat_item idx, int val) | |
1014 | { | |
1015 | mod_node_page_state(page_pgdat(page), idx, val); | |
d69b042f BS |
1016 | } |
1017 | ||
4e416953 | 1018 | static inline |
ef8f2327 | 1019 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
1020 | gfp_t gfp_mask, |
1021 | unsigned long *total_scanned) | |
4e416953 | 1022 | { |
0608f43d | 1023 | return 0; |
4e416953 BS |
1024 | } |
1025 | ||
e94c8a9c | 1026 | static inline void mem_cgroup_split_huge_fixup(struct page *head) |
ca3e0214 KH |
1027 | { |
1028 | } | |
1029 | ||
2262185c RG |
1030 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
1031 | enum vm_event_item idx, | |
1032 | unsigned long count) | |
1033 | { | |
1034 | } | |
1035 | ||
1036 | static inline void count_memcg_page_event(struct page *page, | |
04fecbf5 | 1037 | int idx) |
2262185c RG |
1038 | { |
1039 | } | |
1040 | ||
456f998e | 1041 | static inline |
2262185c | 1042 | void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx) |
456f998e YH |
1043 | { |
1044 | } | |
c255a458 | 1045 | #endif /* CONFIG_MEMCG */ |
78fb7466 | 1046 | |
04fecbf5 | 1047 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1048 | static inline void __inc_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1049 | int idx) |
00f3ca2c JW |
1050 | { |
1051 | __mod_memcg_state(memcg, idx, 1); | |
1052 | } | |
1053 | ||
04fecbf5 | 1054 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1055 | static inline void __dec_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1056 | int idx) |
00f3ca2c JW |
1057 | { |
1058 | __mod_memcg_state(memcg, idx, -1); | |
1059 | } | |
1060 | ||
04fecbf5 | 1061 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1062 | static inline void __inc_memcg_page_state(struct page *page, |
04fecbf5 | 1063 | int idx) |
00f3ca2c JW |
1064 | { |
1065 | __mod_memcg_page_state(page, idx, 1); | |
1066 | } | |
1067 | ||
04fecbf5 | 1068 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1069 | static inline void __dec_memcg_page_state(struct page *page, |
04fecbf5 | 1070 | int idx) |
00f3ca2c JW |
1071 | { |
1072 | __mod_memcg_page_state(page, idx, -1); | |
1073 | } | |
1074 | ||
1075 | static inline void __inc_lruvec_state(struct lruvec *lruvec, | |
1076 | enum node_stat_item idx) | |
1077 | { | |
1078 | __mod_lruvec_state(lruvec, idx, 1); | |
1079 | } | |
1080 | ||
1081 | static inline void __dec_lruvec_state(struct lruvec *lruvec, | |
1082 | enum node_stat_item idx) | |
1083 | { | |
1084 | __mod_lruvec_state(lruvec, idx, -1); | |
1085 | } | |
1086 | ||
1087 | static inline void __inc_lruvec_page_state(struct page *page, | |
1088 | enum node_stat_item idx) | |
1089 | { | |
1090 | __mod_lruvec_page_state(page, idx, 1); | |
1091 | } | |
1092 | ||
1093 | static inline void __dec_lruvec_page_state(struct page *page, | |
1094 | enum node_stat_item idx) | |
1095 | { | |
1096 | __mod_lruvec_page_state(page, idx, -1); | |
1097 | } | |
1098 | ||
04fecbf5 | 1099 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1100 | static inline void inc_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1101 | int idx) |
00f3ca2c JW |
1102 | { |
1103 | mod_memcg_state(memcg, idx, 1); | |
1104 | } | |
1105 | ||
04fecbf5 | 1106 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1107 | static inline void dec_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1108 | int idx) |
00f3ca2c JW |
1109 | { |
1110 | mod_memcg_state(memcg, idx, -1); | |
1111 | } | |
1112 | ||
04fecbf5 | 1113 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1114 | static inline void inc_memcg_page_state(struct page *page, |
04fecbf5 | 1115 | int idx) |
00f3ca2c JW |
1116 | { |
1117 | mod_memcg_page_state(page, idx, 1); | |
1118 | } | |
1119 | ||
04fecbf5 | 1120 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1121 | static inline void dec_memcg_page_state(struct page *page, |
04fecbf5 | 1122 | int idx) |
00f3ca2c JW |
1123 | { |
1124 | mod_memcg_page_state(page, idx, -1); | |
1125 | } | |
1126 | ||
1127 | static inline void inc_lruvec_state(struct lruvec *lruvec, | |
1128 | enum node_stat_item idx) | |
1129 | { | |
1130 | mod_lruvec_state(lruvec, idx, 1); | |
1131 | } | |
1132 | ||
1133 | static inline void dec_lruvec_state(struct lruvec *lruvec, | |
1134 | enum node_stat_item idx) | |
1135 | { | |
1136 | mod_lruvec_state(lruvec, idx, -1); | |
1137 | } | |
1138 | ||
1139 | static inline void inc_lruvec_page_state(struct page *page, | |
1140 | enum node_stat_item idx) | |
1141 | { | |
1142 | mod_lruvec_page_state(page, idx, 1); | |
1143 | } | |
1144 | ||
1145 | static inline void dec_lruvec_page_state(struct page *page, | |
1146 | enum node_stat_item idx) | |
1147 | { | |
1148 | mod_lruvec_page_state(page, idx, -1); | |
1149 | } | |
1150 | ||
52ebea74 | 1151 | #ifdef CONFIG_CGROUP_WRITEBACK |
841710aa | 1152 | |
841710aa | 1153 | struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb); |
c5edf9cd TH |
1154 | void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages, |
1155 | unsigned long *pheadroom, unsigned long *pdirty, | |
1156 | unsigned long *pwriteback); | |
841710aa TH |
1157 | |
1158 | #else /* CONFIG_CGROUP_WRITEBACK */ | |
1159 | ||
1160 | static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb) | |
1161 | { | |
1162 | return NULL; | |
1163 | } | |
1164 | ||
c2aa723a | 1165 | static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb, |
c5edf9cd TH |
1166 | unsigned long *pfilepages, |
1167 | unsigned long *pheadroom, | |
c2aa723a TH |
1168 | unsigned long *pdirty, |
1169 | unsigned long *pwriteback) | |
1170 | { | |
1171 | } | |
1172 | ||
841710aa | 1173 | #endif /* CONFIG_CGROUP_WRITEBACK */ |
52ebea74 | 1174 | |
e1aab161 | 1175 | struct sock; |
baac50bb JW |
1176 | bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); |
1177 | void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); | |
d886f4e4 | 1178 | #ifdef CONFIG_MEMCG |
ef12947c JW |
1179 | extern struct static_key_false memcg_sockets_enabled_key; |
1180 | #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key) | |
2d758073 JW |
1181 | void mem_cgroup_sk_alloc(struct sock *sk); |
1182 | void mem_cgroup_sk_free(struct sock *sk); | |
baac50bb | 1183 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c | 1184 | { |
0db15298 | 1185 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && memcg->tcpmem_pressure) |
8e8ae645 | 1186 | return true; |
8e8ae645 JW |
1187 | do { |
1188 | if (time_before(jiffies, memcg->socket_pressure)) | |
1189 | return true; | |
1190 | } while ((memcg = parent_mem_cgroup(memcg))); | |
1191 | return false; | |
e805605c JW |
1192 | } |
1193 | #else | |
80e95fe0 | 1194 | #define mem_cgroup_sockets_enabled 0 |
2d758073 JW |
1195 | static inline void mem_cgroup_sk_alloc(struct sock *sk) { }; |
1196 | static inline void mem_cgroup_sk_free(struct sock *sk) { }; | |
baac50bb | 1197 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c JW |
1198 | { |
1199 | return false; | |
1200 | } | |
1201 | #endif | |
7ae1e1d0 | 1202 | |
45264778 VD |
1203 | struct kmem_cache *memcg_kmem_get_cache(struct kmem_cache *cachep); |
1204 | void memcg_kmem_put_cache(struct kmem_cache *cachep); | |
1205 | int memcg_kmem_charge_memcg(struct page *page, gfp_t gfp, int order, | |
1206 | struct mem_cgroup *memcg); | |
1207 | int memcg_kmem_charge(struct page *page, gfp_t gfp, int order); | |
1208 | void memcg_kmem_uncharge(struct page *page, int order); | |
1209 | ||
127424c8 | 1210 | #if defined(CONFIG_MEMCG) && !defined(CONFIG_SLOB) |
ef12947c | 1211 | extern struct static_key_false memcg_kmem_enabled_key; |
17cc4dfe | 1212 | extern struct workqueue_struct *memcg_kmem_cache_wq; |
749c5415 | 1213 | |
dbcf73e2 | 1214 | extern int memcg_nr_cache_ids; |
64219994 MH |
1215 | void memcg_get_cache_ids(void); |
1216 | void memcg_put_cache_ids(void); | |
ebe945c2 GC |
1217 | |
1218 | /* | |
1219 | * Helper macro to loop through all memcg-specific caches. Callers must still | |
1220 | * check if the cache is valid (it is either valid or NULL). | |
1221 | * the slab_mutex must be held when looping through those caches | |
1222 | */ | |
749c5415 | 1223 | #define for_each_memcg_cache_index(_idx) \ |
dbcf73e2 | 1224 | for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++) |
749c5415 | 1225 | |
7ae1e1d0 GC |
1226 | static inline bool memcg_kmem_enabled(void) |
1227 | { | |
ef12947c | 1228 | return static_branch_unlikely(&memcg_kmem_enabled_key); |
7ae1e1d0 GC |
1229 | } |
1230 | ||
33398cf2 | 1231 | /* |
9f706d68 | 1232 | * helper for accessing a memcg's index. It will be used as an index in the |
33398cf2 MH |
1233 | * child cache array in kmem_cache, and also to derive its name. This function |
1234 | * will return -1 when this is not a kmem-limited memcg. | |
1235 | */ | |
1236 | static inline int memcg_cache_id(struct mem_cgroup *memcg) | |
1237 | { | |
1238 | return memcg ? memcg->kmemcg_id : -1; | |
1239 | } | |
5722d094 | 1240 | |
7ae1e1d0 | 1241 | #else |
749c5415 GC |
1242 | #define for_each_memcg_cache_index(_idx) \ |
1243 | for (; NULL; ) | |
1244 | ||
b9ce5ef4 GC |
1245 | static inline bool memcg_kmem_enabled(void) |
1246 | { | |
1247 | return false; | |
1248 | } | |
1249 | ||
2633d7a0 GC |
1250 | static inline int memcg_cache_id(struct mem_cgroup *memcg) |
1251 | { | |
1252 | return -1; | |
1253 | } | |
1254 | ||
05257a1a VD |
1255 | static inline void memcg_get_cache_ids(void) |
1256 | { | |
1257 | } | |
1258 | ||
1259 | static inline void memcg_put_cache_ids(void) | |
1260 | { | |
1261 | } | |
1262 | ||
127424c8 JW |
1263 | #endif /* CONFIG_MEMCG && !CONFIG_SLOB */ |
1264 | ||
8cdea7c0 | 1265 | #endif /* _LINUX_MEMCONTROL_H */ |