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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, | |
f3a53a3a TH |
56 | MEMCG_SWAP_MAX, |
57 | MEMCG_SWAP_FAIL, | |
e27be240 | 58 | MEMCG_NR_MEMORY_EVENTS, |
71cd3113 JW |
59 | }; |
60 | ||
5660048c | 61 | struct mem_cgroup_reclaim_cookie { |
ef8f2327 | 62 | pg_data_t *pgdat; |
5660048c JW |
63 | int priority; |
64 | unsigned int generation; | |
65 | }; | |
66 | ||
71cd3113 JW |
67 | #ifdef CONFIG_MEMCG |
68 | ||
69 | #define MEM_CGROUP_ID_SHIFT 16 | |
70 | #define MEM_CGROUP_ID_MAX USHRT_MAX | |
71 | ||
72 | struct mem_cgroup_id { | |
73 | int id; | |
74 | atomic_t ref; | |
75 | }; | |
76 | ||
33398cf2 MH |
77 | /* |
78 | * Per memcg event counter is incremented at every pagein/pageout. With THP, | |
79 | * it will be incremated by the number of pages. This counter is used for | |
80 | * for trigger some periodic events. This is straightforward and better | |
81 | * than using jiffies etc. to handle periodic memcg event. | |
82 | */ | |
83 | enum mem_cgroup_events_target { | |
84 | MEM_CGROUP_TARGET_THRESH, | |
85 | MEM_CGROUP_TARGET_SOFTLIMIT, | |
86 | MEM_CGROUP_TARGET_NUMAINFO, | |
87 | MEM_CGROUP_NTARGETS, | |
88 | }; | |
89 | ||
33398cf2 | 90 | struct mem_cgroup_stat_cpu { |
b2807f07 | 91 | long count[MEMCG_NR_STAT]; |
e27be240 | 92 | unsigned long events[NR_VM_EVENT_ITEMS]; |
33398cf2 MH |
93 | unsigned long nr_page_events; |
94 | unsigned long targets[MEM_CGROUP_NTARGETS]; | |
95 | }; | |
96 | ||
97 | struct mem_cgroup_reclaim_iter { | |
98 | struct mem_cgroup *position; | |
99 | /* scan generation, increased every round-trip */ | |
100 | unsigned int generation; | |
101 | }; | |
102 | ||
00f3ca2c JW |
103 | struct lruvec_stat { |
104 | long count[NR_VM_NODE_STAT_ITEMS]; | |
105 | }; | |
106 | ||
33398cf2 MH |
107 | /* |
108 | * per-zone information in memory controller. | |
109 | */ | |
ef8f2327 | 110 | struct mem_cgroup_per_node { |
33398cf2 | 111 | struct lruvec lruvec; |
a983b5eb JW |
112 | |
113 | struct lruvec_stat __percpu *lruvec_stat_cpu; | |
114 | atomic_long_t lruvec_stat[NR_VM_NODE_STAT_ITEMS]; | |
115 | ||
b4536f0c | 116 | unsigned long lru_zone_size[MAX_NR_ZONES][NR_LRU_LISTS]; |
33398cf2 MH |
117 | |
118 | struct mem_cgroup_reclaim_iter iter[DEF_PRIORITY + 1]; | |
119 | ||
120 | struct rb_node tree_node; /* RB tree node */ | |
121 | unsigned long usage_in_excess;/* Set to the value by which */ | |
122 | /* the soft limit is exceeded*/ | |
123 | bool on_tree; | |
e3c1ac58 AR |
124 | bool congested; /* memcg has many dirty pages */ |
125 | /* backed by a congested BDI */ | |
126 | ||
33398cf2 MH |
127 | struct mem_cgroup *memcg; /* Back pointer, we cannot */ |
128 | /* use container_of */ | |
129 | }; | |
130 | ||
33398cf2 MH |
131 | struct mem_cgroup_threshold { |
132 | struct eventfd_ctx *eventfd; | |
133 | unsigned long threshold; | |
134 | }; | |
135 | ||
136 | /* For threshold */ | |
137 | struct mem_cgroup_threshold_ary { | |
138 | /* An array index points to threshold just below or equal to usage. */ | |
139 | int current_threshold; | |
140 | /* Size of entries[] */ | |
141 | unsigned int size; | |
142 | /* Array of thresholds */ | |
143 | struct mem_cgroup_threshold entries[0]; | |
144 | }; | |
145 | ||
146 | struct mem_cgroup_thresholds { | |
147 | /* Primary thresholds array */ | |
148 | struct mem_cgroup_threshold_ary *primary; | |
149 | /* | |
150 | * Spare threshold array. | |
151 | * This is needed to make mem_cgroup_unregister_event() "never fail". | |
152 | * It must be able to store at least primary->size - 1 entries. | |
153 | */ | |
154 | struct mem_cgroup_threshold_ary *spare; | |
155 | }; | |
156 | ||
567e9ab2 JW |
157 | enum memcg_kmem_state { |
158 | KMEM_NONE, | |
159 | KMEM_ALLOCATED, | |
160 | KMEM_ONLINE, | |
161 | }; | |
162 | ||
33398cf2 MH |
163 | /* |
164 | * The memory controller data structure. The memory controller controls both | |
165 | * page cache and RSS per cgroup. We would eventually like to provide | |
166 | * statistics based on the statistics developed by Rik Van Riel for clock-pro, | |
167 | * to help the administrator determine what knobs to tune. | |
168 | */ | |
169 | struct mem_cgroup { | |
170 | struct cgroup_subsys_state css; | |
171 | ||
73f576c0 JW |
172 | /* Private memcg ID. Used to ID objects that outlive the cgroup */ |
173 | struct mem_cgroup_id id; | |
174 | ||
33398cf2 MH |
175 | /* Accounted resources */ |
176 | struct page_counter memory; | |
37e84351 | 177 | struct page_counter swap; |
0db15298 JW |
178 | |
179 | /* Legacy consumer-oriented counters */ | |
33398cf2 MH |
180 | struct page_counter memsw; |
181 | struct page_counter kmem; | |
0db15298 | 182 | struct page_counter tcpmem; |
33398cf2 MH |
183 | |
184 | /* Normal memory consumption range */ | |
185 | unsigned long low; | |
186 | unsigned long high; | |
187 | ||
f7e1cb6e JW |
188 | /* Range enforcement for interrupt charges */ |
189 | struct work_struct high_work; | |
190 | ||
33398cf2 MH |
191 | unsigned long soft_limit; |
192 | ||
193 | /* vmpressure notifications */ | |
194 | struct vmpressure vmpressure; | |
195 | ||
33398cf2 MH |
196 | /* |
197 | * Should the accounting and control be hierarchical, per subtree? | |
198 | */ | |
199 | bool use_hierarchy; | |
200 | ||
201 | /* protected by memcg_oom_lock */ | |
202 | bool oom_lock; | |
203 | int under_oom; | |
204 | ||
205 | int swappiness; | |
206 | /* OOM-Killer disable */ | |
207 | int oom_kill_disable; | |
208 | ||
e27be240 JW |
209 | /* memory.events */ |
210 | atomic_long_t memory_events[MEMCG_NR_MEMORY_EVENTS]; | |
472912a2 TH |
211 | struct cgroup_file events_file; |
212 | ||
f3a53a3a TH |
213 | /* handle for "memory.swap.events" */ |
214 | struct cgroup_file swap_events_file; | |
215 | ||
33398cf2 MH |
216 | /* protect arrays of thresholds */ |
217 | struct mutex thresholds_lock; | |
218 | ||
219 | /* thresholds for memory usage. RCU-protected */ | |
220 | struct mem_cgroup_thresholds thresholds; | |
221 | ||
222 | /* thresholds for mem+swap usage. RCU-protected */ | |
223 | struct mem_cgroup_thresholds memsw_thresholds; | |
224 | ||
225 | /* For oom notifier event fd */ | |
226 | struct list_head oom_notify; | |
227 | ||
228 | /* | |
229 | * Should we move charges of a task when a task is moved into this | |
230 | * mem_cgroup ? And what type of charges should we move ? | |
231 | */ | |
232 | unsigned long move_charge_at_immigrate; | |
233 | /* | |
234 | * set > 0 if pages under this cgroup are moving to other cgroup. | |
235 | */ | |
236 | atomic_t moving_account; | |
237 | /* taken only while moving_account > 0 */ | |
238 | spinlock_t move_lock; | |
239 | struct task_struct *move_lock_task; | |
240 | unsigned long move_lock_flags; | |
a983b5eb | 241 | |
e27be240 | 242 | /* memory.stat */ |
a983b5eb JW |
243 | struct mem_cgroup_stat_cpu __percpu *stat_cpu; |
244 | atomic_long_t stat[MEMCG_NR_STAT]; | |
e27be240 | 245 | atomic_long_t events[NR_VM_EVENT_ITEMS]; |
33398cf2 | 246 | |
d886f4e4 JW |
247 | unsigned long socket_pressure; |
248 | ||
249 | /* Legacy tcp memory accounting */ | |
0db15298 JW |
250 | bool tcpmem_active; |
251 | int tcpmem_pressure; | |
d886f4e4 | 252 | |
127424c8 | 253 | #ifndef CONFIG_SLOB |
33398cf2 MH |
254 | /* Index in the kmem_cache->memcg_params.memcg_caches array */ |
255 | int kmemcg_id; | |
567e9ab2 | 256 | enum memcg_kmem_state kmem_state; |
bc2791f8 | 257 | struct list_head kmem_caches; |
33398cf2 MH |
258 | #endif |
259 | ||
260 | int last_scanned_node; | |
261 | #if MAX_NUMNODES > 1 | |
262 | nodemask_t scan_nodes; | |
263 | atomic_t numainfo_events; | |
264 | atomic_t numainfo_updating; | |
265 | #endif | |
266 | ||
267 | #ifdef CONFIG_CGROUP_WRITEBACK | |
268 | struct list_head cgwb_list; | |
269 | struct wb_domain cgwb_domain; | |
270 | #endif | |
271 | ||
272 | /* List of events which userspace want to receive */ | |
273 | struct list_head event_list; | |
274 | spinlock_t event_list_lock; | |
275 | ||
276 | struct mem_cgroup_per_node *nodeinfo[0]; | |
277 | /* WARNING: nodeinfo must be the last member here */ | |
278 | }; | |
7d828602 | 279 | |
a983b5eb JW |
280 | /* |
281 | * size of first charge trial. "32" comes from vmscan.c's magic value. | |
282 | * TODO: maybe necessary to use big numbers in big irons. | |
283 | */ | |
284 | #define MEMCG_CHARGE_BATCH 32U | |
285 | ||
7d828602 | 286 | extern struct mem_cgroup *root_mem_cgroup; |
56161634 | 287 | |
23047a96 JW |
288 | static inline bool mem_cgroup_disabled(void) |
289 | { | |
290 | return !cgroup_subsys_enabled(memory_cgrp_subsys); | |
291 | } | |
292 | ||
241994ed JW |
293 | bool mem_cgroup_low(struct mem_cgroup *root, struct mem_cgroup *memcg); |
294 | ||
00501b53 | 295 | int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
f627c2f5 KS |
296 | gfp_t gfp_mask, struct mem_cgroup **memcgp, |
297 | bool compound); | |
00501b53 | 298 | void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg, |
f627c2f5 KS |
299 | bool lrucare, bool compound); |
300 | void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg, | |
301 | bool compound); | |
0a31bc97 | 302 | void mem_cgroup_uncharge(struct page *page); |
747db954 | 303 | void mem_cgroup_uncharge_list(struct list_head *page_list); |
569b846d | 304 | |
6a93ca8f | 305 | void mem_cgroup_migrate(struct page *oldpage, struct page *newpage); |
569b846d | 306 | |
ef8f2327 MG |
307 | static struct mem_cgroup_per_node * |
308 | mem_cgroup_nodeinfo(struct mem_cgroup *memcg, int nid) | |
55779ec7 | 309 | { |
ef8f2327 | 310 | return memcg->nodeinfo[nid]; |
55779ec7 JW |
311 | } |
312 | ||
313 | /** | |
a9dd0a83 MG |
314 | * mem_cgroup_lruvec - get the lru list vector for a node or a memcg zone |
315 | * @node: node of the wanted lruvec | |
55779ec7 JW |
316 | * @memcg: memcg of the wanted lruvec |
317 | * | |
a9dd0a83 MG |
318 | * Returns the lru list vector holding pages for a given @node or a given |
319 | * @memcg and @zone. This can be the node lruvec, if the memory controller | |
55779ec7 JW |
320 | * is disabled. |
321 | */ | |
a9dd0a83 | 322 | static inline struct lruvec *mem_cgroup_lruvec(struct pglist_data *pgdat, |
ef8f2327 | 323 | struct mem_cgroup *memcg) |
55779ec7 | 324 | { |
ef8f2327 | 325 | struct mem_cgroup_per_node *mz; |
55779ec7 JW |
326 | struct lruvec *lruvec; |
327 | ||
328 | if (mem_cgroup_disabled()) { | |
a9dd0a83 | 329 | lruvec = node_lruvec(pgdat); |
55779ec7 JW |
330 | goto out; |
331 | } | |
332 | ||
ef8f2327 | 333 | mz = mem_cgroup_nodeinfo(memcg, pgdat->node_id); |
55779ec7 JW |
334 | lruvec = &mz->lruvec; |
335 | out: | |
336 | /* | |
337 | * Since a node can be onlined after the mem_cgroup was created, | |
599d0c95 | 338 | * we have to be prepared to initialize lruvec->pgdat here; |
55779ec7 JW |
339 | * and if offlined then reonlined, we need to reinitialize it. |
340 | */ | |
ef8f2327 MG |
341 | if (unlikely(lruvec->pgdat != pgdat)) |
342 | lruvec->pgdat = pgdat; | |
55779ec7 JW |
343 | return lruvec; |
344 | } | |
345 | ||
599d0c95 | 346 | struct lruvec *mem_cgroup_page_lruvec(struct page *, struct pglist_data *); |
c9b0ed51 | 347 | |
2314b42d | 348 | bool task_in_mem_cgroup(struct task_struct *task, struct mem_cgroup *memcg); |
64219994 | 349 | struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
e993d905 | 350 | |
33398cf2 MH |
351 | static inline |
352 | struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){ | |
353 | return css ? container_of(css, struct mem_cgroup, css) : NULL; | |
354 | } | |
355 | ||
8e8ae645 JW |
356 | #define mem_cgroup_from_counter(counter, member) \ |
357 | container_of(counter, struct mem_cgroup, member) | |
358 | ||
33398cf2 MH |
359 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
360 | struct mem_cgroup *, | |
361 | struct mem_cgroup_reclaim_cookie *); | |
362 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); | |
7c5f64f8 VD |
363 | int mem_cgroup_scan_tasks(struct mem_cgroup *, |
364 | int (*)(struct task_struct *, void *), void *); | |
33398cf2 | 365 | |
23047a96 JW |
366 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
367 | { | |
368 | if (mem_cgroup_disabled()) | |
369 | return 0; | |
370 | ||
73f576c0 | 371 | return memcg->id.id; |
23047a96 | 372 | } |
73f576c0 | 373 | struct mem_cgroup *mem_cgroup_from_id(unsigned short id); |
23047a96 | 374 | |
2262185c RG |
375 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
376 | { | |
377 | struct mem_cgroup_per_node *mz; | |
378 | ||
379 | if (mem_cgroup_disabled()) | |
380 | return NULL; | |
381 | ||
382 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
383 | return mz->memcg; | |
384 | } | |
385 | ||
8e8ae645 JW |
386 | /** |
387 | * parent_mem_cgroup - find the accounting parent of a memcg | |
388 | * @memcg: memcg whose parent to find | |
389 | * | |
390 | * Returns the parent memcg, or NULL if this is the root or the memory | |
391 | * controller is in legacy no-hierarchy mode. | |
392 | */ | |
393 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) | |
394 | { | |
395 | if (!memcg->memory.parent) | |
396 | return NULL; | |
397 | return mem_cgroup_from_counter(memcg->memory.parent, memory); | |
398 | } | |
399 | ||
33398cf2 MH |
400 | static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, |
401 | struct mem_cgroup *root) | |
402 | { | |
403 | if (root == memcg) | |
404 | return true; | |
405 | if (!root->use_hierarchy) | |
406 | return false; | |
407 | return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup); | |
408 | } | |
e1aab161 | 409 | |
2314b42d JW |
410 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
411 | struct mem_cgroup *memcg) | |
2e4d4091 | 412 | { |
587af308 | 413 | struct mem_cgroup *task_memcg; |
413918bb | 414 | bool match = false; |
c3ac9a8a | 415 | |
2e4d4091 | 416 | rcu_read_lock(); |
587af308 | 417 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
413918bb | 418 | if (task_memcg) |
2314b42d | 419 | match = mem_cgroup_is_descendant(task_memcg, memcg); |
2e4d4091 | 420 | rcu_read_unlock(); |
c3ac9a8a | 421 | return match; |
2e4d4091 | 422 | } |
8a9f3ccd | 423 | |
64219994 | 424 | struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page); |
2fc04524 | 425 | ino_t page_cgroup_ino(struct page *page); |
d324236b | 426 | |
eb01aaab VD |
427 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
428 | { | |
429 | if (mem_cgroup_disabled()) | |
430 | return true; | |
431 | return !!(memcg->css.flags & CSS_ONLINE); | |
432 | } | |
433 | ||
58ae83db KH |
434 | /* |
435 | * For memory reclaim. | |
436 | */ | |
889976db | 437 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
33398cf2 MH |
438 | |
439 | void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, | |
b4536f0c | 440 | int zid, int nr_pages); |
33398cf2 | 441 | |
0a6b76dd VD |
442 | unsigned long mem_cgroup_node_nr_lru_pages(struct mem_cgroup *memcg, |
443 | int nid, unsigned int lru_mask); | |
444 | ||
33398cf2 MH |
445 | static inline |
446 | unsigned long mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru) | |
447 | { | |
ef8f2327 | 448 | struct mem_cgroup_per_node *mz; |
b4536f0c MH |
449 | unsigned long nr_pages = 0; |
450 | int zid; | |
33398cf2 | 451 | |
ef8f2327 | 452 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); |
b4536f0c MH |
453 | for (zid = 0; zid < MAX_NR_ZONES; zid++) |
454 | nr_pages += mz->lru_zone_size[zid][lru]; | |
455 | return nr_pages; | |
456 | } | |
457 | ||
458 | static inline | |
459 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
460 | enum lru_list lru, int zone_idx) | |
461 | { | |
462 | struct mem_cgroup_per_node *mz; | |
463 | ||
464 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
465 | return mz->lru_zone_size[zone_idx][lru]; | |
33398cf2 MH |
466 | } |
467 | ||
b23afb93 TH |
468 | void mem_cgroup_handle_over_high(void); |
469 | ||
7c5f64f8 VD |
470 | unsigned long mem_cgroup_get_limit(struct mem_cgroup *memcg); |
471 | ||
64219994 MH |
472 | void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, |
473 | struct task_struct *p); | |
58ae83db | 474 | |
49426420 | 475 | static inline void mem_cgroup_oom_enable(void) |
519e5247 | 476 | { |
626ebc41 TH |
477 | WARN_ON(current->memcg_may_oom); |
478 | current->memcg_may_oom = 1; | |
519e5247 JW |
479 | } |
480 | ||
49426420 | 481 | static inline void mem_cgroup_oom_disable(void) |
519e5247 | 482 | { |
626ebc41 TH |
483 | WARN_ON(!current->memcg_may_oom); |
484 | current->memcg_may_oom = 0; | |
519e5247 JW |
485 | } |
486 | ||
3812c8c8 JW |
487 | static inline bool task_in_memcg_oom(struct task_struct *p) |
488 | { | |
626ebc41 | 489 | return p->memcg_in_oom; |
3812c8c8 JW |
490 | } |
491 | ||
49426420 | 492 | bool mem_cgroup_oom_synchronize(bool wait); |
3812c8c8 | 493 | |
c255a458 | 494 | #ifdef CONFIG_MEMCG_SWAP |
c077719b KH |
495 | extern int do_swap_account; |
496 | #endif | |
f8d66542 | 497 | |
739f79fc JW |
498 | struct mem_cgroup *lock_page_memcg(struct page *page); |
499 | void __unlock_page_memcg(struct mem_cgroup *memcg); | |
62cccb8c | 500 | void unlock_page_memcg(struct page *page); |
d7365e78 | 501 | |
04fecbf5 | 502 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
ccda7f43 | 503 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, |
04fecbf5 | 504 | int idx) |
2a2e4885 | 505 | { |
a983b5eb JW |
506 | long x = atomic_long_read(&memcg->stat[idx]); |
507 | #ifdef CONFIG_SMP | |
508 | if (x < 0) | |
509 | x = 0; | |
510 | #endif | |
511 | return x; | |
2a2e4885 JW |
512 | } |
513 | ||
04fecbf5 | 514 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 515 | static inline void __mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 516 | int idx, int val) |
2a2e4885 | 517 | { |
a983b5eb JW |
518 | long x; |
519 | ||
520 | if (mem_cgroup_disabled()) | |
521 | return; | |
522 | ||
523 | x = val + __this_cpu_read(memcg->stat_cpu->count[idx]); | |
524 | if (unlikely(abs(x) > MEMCG_CHARGE_BATCH)) { | |
525 | atomic_long_add(x, &memcg->stat[idx]); | |
526 | x = 0; | |
527 | } | |
528 | __this_cpu_write(memcg->stat_cpu->count[idx], x); | |
2a2e4885 JW |
529 | } |
530 | ||
04fecbf5 | 531 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 532 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 533 | int idx, int val) |
2a2e4885 | 534 | { |
c3cc3911 JW |
535 | unsigned long flags; |
536 | ||
537 | local_irq_save(flags); | |
a983b5eb | 538 | __mod_memcg_state(memcg, idx, val); |
c3cc3911 | 539 | local_irq_restore(flags); |
2a2e4885 JW |
540 | } |
541 | ||
33398cf2 | 542 | /** |
ccda7f43 | 543 | * mod_memcg_page_state - update page state statistics |
62cccb8c | 544 | * @page: the page |
33398cf2 MH |
545 | * @idx: page state item to account |
546 | * @val: number of pages (positive or negative) | |
547 | * | |
fdf1cdb9 JW |
548 | * The @page must be locked or the caller must use lock_page_memcg() |
549 | * to prevent double accounting when the page is concurrently being | |
550 | * moved to another memcg: | |
81f8c3a4 | 551 | * |
fdf1cdb9 | 552 | * lock_page(page) or lock_page_memcg(page) |
81f8c3a4 | 553 | * if (TestClearPageState(page)) |
ccda7f43 | 554 | * mod_memcg_page_state(page, state, -1); |
fdf1cdb9 | 555 | * unlock_page(page) or unlock_page_memcg(page) |
2a2e4885 JW |
556 | * |
557 | * Kernel pages are an exception to this, since they'll never move. | |
33398cf2 | 558 | */ |
00f3ca2c | 559 | static inline void __mod_memcg_page_state(struct page *page, |
04fecbf5 | 560 | int idx, int val) |
00f3ca2c JW |
561 | { |
562 | if (page->mem_cgroup) | |
563 | __mod_memcg_state(page->mem_cgroup, idx, val); | |
564 | } | |
565 | ||
ccda7f43 | 566 | static inline void mod_memcg_page_state(struct page *page, |
04fecbf5 | 567 | int idx, int val) |
33398cf2 | 568 | { |
62cccb8c | 569 | if (page->mem_cgroup) |
ccda7f43 | 570 | mod_memcg_state(page->mem_cgroup, idx, val); |
33398cf2 MH |
571 | } |
572 | ||
00f3ca2c JW |
573 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
574 | enum node_stat_item idx) | |
2a7106f2 | 575 | { |
00f3ca2c | 576 | struct mem_cgroup_per_node *pn; |
a983b5eb | 577 | long x; |
00f3ca2c JW |
578 | |
579 | if (mem_cgroup_disabled()) | |
580 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
581 | ||
582 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
a983b5eb JW |
583 | x = atomic_long_read(&pn->lruvec_stat[idx]); |
584 | #ifdef CONFIG_SMP | |
585 | if (x < 0) | |
586 | x = 0; | |
587 | #endif | |
588 | return x; | |
2a7106f2 GT |
589 | } |
590 | ||
00f3ca2c JW |
591 | static inline void __mod_lruvec_state(struct lruvec *lruvec, |
592 | enum node_stat_item idx, int val) | |
2a7106f2 | 593 | { |
00f3ca2c | 594 | struct mem_cgroup_per_node *pn; |
a983b5eb | 595 | long x; |
00f3ca2c | 596 | |
28454265 | 597 | /* Update node */ |
00f3ca2c | 598 | __mod_node_page_state(lruvec_pgdat(lruvec), idx, val); |
28454265 | 599 | |
00f3ca2c JW |
600 | if (mem_cgroup_disabled()) |
601 | return; | |
28454265 | 602 | |
00f3ca2c | 603 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); |
28454265 JW |
604 | |
605 | /* Update memcg */ | |
00f3ca2c | 606 | __mod_memcg_state(pn->memcg, idx, val); |
28454265 JW |
607 | |
608 | /* Update lruvec */ | |
a983b5eb JW |
609 | x = val + __this_cpu_read(pn->lruvec_stat_cpu->count[idx]); |
610 | if (unlikely(abs(x) > MEMCG_CHARGE_BATCH)) { | |
611 | atomic_long_add(x, &pn->lruvec_stat[idx]); | |
612 | x = 0; | |
613 | } | |
614 | __this_cpu_write(pn->lruvec_stat_cpu->count[idx], x); | |
00f3ca2c JW |
615 | } |
616 | ||
617 | static inline void mod_lruvec_state(struct lruvec *lruvec, | |
618 | enum node_stat_item idx, int val) | |
619 | { | |
c3cc3911 JW |
620 | unsigned long flags; |
621 | ||
622 | local_irq_save(flags); | |
28454265 | 623 | __mod_lruvec_state(lruvec, idx, val); |
c3cc3911 | 624 | local_irq_restore(flags); |
00f3ca2c JW |
625 | } |
626 | ||
627 | static inline void __mod_lruvec_page_state(struct page *page, | |
628 | enum node_stat_item idx, int val) | |
629 | { | |
28454265 JW |
630 | pg_data_t *pgdat = page_pgdat(page); |
631 | struct lruvec *lruvec; | |
00f3ca2c | 632 | |
28454265 JW |
633 | /* Untracked pages have no memcg, no lruvec. Update only the node */ |
634 | if (!page->mem_cgroup) { | |
635 | __mod_node_page_state(pgdat, idx, val); | |
00f3ca2c | 636 | return; |
28454265 JW |
637 | } |
638 | ||
639 | lruvec = mem_cgroup_lruvec(pgdat, page->mem_cgroup); | |
640 | __mod_lruvec_state(lruvec, idx, val); | |
00f3ca2c JW |
641 | } |
642 | ||
643 | static inline void mod_lruvec_page_state(struct page *page, | |
644 | enum node_stat_item idx, int val) | |
645 | { | |
c3cc3911 JW |
646 | unsigned long flags; |
647 | ||
648 | local_irq_save(flags); | |
28454265 | 649 | __mod_lruvec_page_state(page, idx, val); |
c3cc3911 | 650 | local_irq_restore(flags); |
2a7106f2 GT |
651 | } |
652 | ||
ef8f2327 | 653 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
654 | gfp_t gfp_mask, |
655 | unsigned long *total_scanned); | |
a63d83f4 | 656 | |
c9019e9b | 657 | static inline void __count_memcg_events(struct mem_cgroup *memcg, |
e27be240 JW |
658 | enum vm_event_item idx, |
659 | unsigned long count) | |
c9019e9b | 660 | { |
a983b5eb JW |
661 | unsigned long x; |
662 | ||
663 | if (mem_cgroup_disabled()) | |
664 | return; | |
665 | ||
666 | x = count + __this_cpu_read(memcg->stat_cpu->events[idx]); | |
667 | if (unlikely(x > MEMCG_CHARGE_BATCH)) { | |
668 | atomic_long_add(x, &memcg->events[idx]); | |
669 | x = 0; | |
670 | } | |
671 | __this_cpu_write(memcg->stat_cpu->events[idx], x); | |
c9019e9b JW |
672 | } |
673 | ||
2262185c | 674 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
e27be240 JW |
675 | enum vm_event_item idx, |
676 | unsigned long count) | |
2262185c | 677 | { |
c3cc3911 JW |
678 | unsigned long flags; |
679 | ||
680 | local_irq_save(flags); | |
a983b5eb | 681 | __count_memcg_events(memcg, idx, count); |
c3cc3911 | 682 | local_irq_restore(flags); |
2262185c RG |
683 | } |
684 | ||
685 | static inline void count_memcg_page_event(struct page *page, | |
e27be240 | 686 | enum vm_event_item idx) |
2262185c RG |
687 | { |
688 | if (page->mem_cgroup) | |
689 | count_memcg_events(page->mem_cgroup, idx, 1); | |
690 | } | |
691 | ||
692 | static inline void count_memcg_event_mm(struct mm_struct *mm, | |
693 | enum vm_event_item idx) | |
68ae564b | 694 | { |
33398cf2 MH |
695 | struct mem_cgroup *memcg; |
696 | ||
68ae564b DR |
697 | if (mem_cgroup_disabled()) |
698 | return; | |
33398cf2 MH |
699 | |
700 | rcu_read_lock(); | |
701 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
8e675f7a | 702 | if (likely(memcg)) { |
c9019e9b | 703 | count_memcg_events(memcg, idx, 1); |
8e675f7a KK |
704 | if (idx == OOM_KILL) |
705 | cgroup_file_notify(&memcg->events_file); | |
706 | } | |
33398cf2 | 707 | rcu_read_unlock(); |
68ae564b | 708 | } |
c9019e9b | 709 | |
e27be240 JW |
710 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
711 | enum memcg_memory_event event) | |
c9019e9b | 712 | { |
e27be240 | 713 | atomic_long_inc(&memcg->memory_events[event]); |
c9019e9b JW |
714 | cgroup_file_notify(&memcg->events_file); |
715 | } | |
716 | ||
ca3e0214 | 717 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
e94c8a9c | 718 | void mem_cgroup_split_huge_fixup(struct page *head); |
ca3e0214 KH |
719 | #endif |
720 | ||
c255a458 | 721 | #else /* CONFIG_MEMCG */ |
23047a96 JW |
722 | |
723 | #define MEM_CGROUP_ID_SHIFT 0 | |
724 | #define MEM_CGROUP_ID_MAX 0 | |
725 | ||
7a81b88c KH |
726 | struct mem_cgroup; |
727 | ||
23047a96 JW |
728 | static inline bool mem_cgroup_disabled(void) |
729 | { | |
730 | return true; | |
731 | } | |
732 | ||
e27be240 JW |
733 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
734 | enum memcg_memory_event event) | |
241994ed JW |
735 | { |
736 | } | |
737 | ||
738 | static inline bool mem_cgroup_low(struct mem_cgroup *root, | |
739 | struct mem_cgroup *memcg) | |
740 | { | |
741 | return false; | |
742 | } | |
743 | ||
00501b53 JW |
744 | static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
745 | gfp_t gfp_mask, | |
f627c2f5 KS |
746 | struct mem_cgroup **memcgp, |
747 | bool compound) | |
7a81b88c | 748 | { |
00501b53 | 749 | *memcgp = NULL; |
7a81b88c KH |
750 | return 0; |
751 | } | |
752 | ||
00501b53 JW |
753 | static inline void mem_cgroup_commit_charge(struct page *page, |
754 | struct mem_cgroup *memcg, | |
f627c2f5 | 755 | bool lrucare, bool compound) |
7a81b88c KH |
756 | { |
757 | } | |
758 | ||
00501b53 | 759 | static inline void mem_cgroup_cancel_charge(struct page *page, |
f627c2f5 KS |
760 | struct mem_cgroup *memcg, |
761 | bool compound) | |
7a81b88c KH |
762 | { |
763 | } | |
764 | ||
0a31bc97 | 765 | static inline void mem_cgroup_uncharge(struct page *page) |
569b846d KH |
766 | { |
767 | } | |
768 | ||
747db954 | 769 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
8a9f3ccd BS |
770 | { |
771 | } | |
772 | ||
6a93ca8f | 773 | static inline void mem_cgroup_migrate(struct page *old, struct page *new) |
69029cd5 KH |
774 | { |
775 | } | |
776 | ||
a9dd0a83 | 777 | static inline struct lruvec *mem_cgroup_lruvec(struct pglist_data *pgdat, |
ef8f2327 | 778 | struct mem_cgroup *memcg) |
08e552c6 | 779 | { |
a9dd0a83 | 780 | return node_lruvec(pgdat); |
08e552c6 KH |
781 | } |
782 | ||
fa9add64 | 783 | static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, |
599d0c95 | 784 | struct pglist_data *pgdat) |
66e1707b | 785 | { |
599d0c95 | 786 | return &pgdat->lruvec; |
66e1707b BS |
787 | } |
788 | ||
587af308 | 789 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
c0ff4b85 | 790 | struct mem_cgroup *memcg) |
bed7161a | 791 | { |
587af308 | 792 | return true; |
bed7161a BS |
793 | } |
794 | ||
ffbdccf5 DR |
795 | static inline bool task_in_mem_cgroup(struct task_struct *task, |
796 | const struct mem_cgroup *memcg) | |
4c4a2214 | 797 | { |
ffbdccf5 | 798 | return true; |
4c4a2214 DR |
799 | } |
800 | ||
5660048c JW |
801 | static inline struct mem_cgroup * |
802 | mem_cgroup_iter(struct mem_cgroup *root, | |
803 | struct mem_cgroup *prev, | |
804 | struct mem_cgroup_reclaim_cookie *reclaim) | |
805 | { | |
806 | return NULL; | |
807 | } | |
808 | ||
809 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
810 | struct mem_cgroup *prev) | |
811 | { | |
812 | } | |
813 | ||
7c5f64f8 VD |
814 | static inline int mem_cgroup_scan_tasks(struct mem_cgroup *memcg, |
815 | int (*fn)(struct task_struct *, void *), void *arg) | |
816 | { | |
817 | return 0; | |
818 | } | |
819 | ||
23047a96 | 820 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
f8d66542 | 821 | { |
23047a96 JW |
822 | return 0; |
823 | } | |
824 | ||
825 | static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id) | |
826 | { | |
827 | WARN_ON_ONCE(id); | |
828 | /* XXX: This should always return root_mem_cgroup */ | |
829 | return NULL; | |
f8d66542 | 830 | } |
a636b327 | 831 | |
2262185c RG |
832 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
833 | { | |
834 | return NULL; | |
835 | } | |
836 | ||
eb01aaab | 837 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
14797e23 | 838 | { |
13308ca9 | 839 | return true; |
14797e23 KM |
840 | } |
841 | ||
a3d8e054 | 842 | static inline unsigned long |
4d7dcca2 | 843 | mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru) |
a3d8e054 KM |
844 | { |
845 | return 0; | |
846 | } | |
b4536f0c MH |
847 | static inline |
848 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
849 | enum lru_list lru, int zone_idx) | |
850 | { | |
851 | return 0; | |
852 | } | |
a3d8e054 | 853 | |
0a6b76dd VD |
854 | static inline unsigned long |
855 | mem_cgroup_node_nr_lru_pages(struct mem_cgroup *memcg, | |
856 | int nid, unsigned int lru_mask) | |
857 | { | |
858 | return 0; | |
859 | } | |
860 | ||
7c5f64f8 VD |
861 | static inline unsigned long mem_cgroup_get_limit(struct mem_cgroup *memcg) |
862 | { | |
863 | return 0; | |
864 | } | |
865 | ||
e222432b BS |
866 | static inline void |
867 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) | |
868 | { | |
869 | } | |
870 | ||
739f79fc JW |
871 | static inline struct mem_cgroup *lock_page_memcg(struct page *page) |
872 | { | |
873 | return NULL; | |
874 | } | |
875 | ||
876 | static inline void __unlock_page_memcg(struct mem_cgroup *memcg) | |
89c06bd5 KH |
877 | { |
878 | } | |
879 | ||
62cccb8c | 880 | static inline void unlock_page_memcg(struct page *page) |
89c06bd5 KH |
881 | { |
882 | } | |
883 | ||
b23afb93 TH |
884 | static inline void mem_cgroup_handle_over_high(void) |
885 | { | |
886 | } | |
887 | ||
49426420 | 888 | static inline void mem_cgroup_oom_enable(void) |
519e5247 JW |
889 | { |
890 | } | |
891 | ||
49426420 | 892 | static inline void mem_cgroup_oom_disable(void) |
519e5247 JW |
893 | { |
894 | } | |
895 | ||
3812c8c8 JW |
896 | static inline bool task_in_memcg_oom(struct task_struct *p) |
897 | { | |
898 | return false; | |
899 | } | |
900 | ||
49426420 | 901 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
3812c8c8 JW |
902 | { |
903 | return false; | |
904 | } | |
905 | ||
ccda7f43 | 906 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, |
04fecbf5 | 907 | int idx) |
2a2e4885 JW |
908 | { |
909 | return 0; | |
910 | } | |
911 | ||
00f3ca2c | 912 | static inline void __mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 913 | int idx, |
00f3ca2c | 914 | int nr) |
2a2e4885 JW |
915 | { |
916 | } | |
917 | ||
00f3ca2c | 918 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 919 | int idx, |
00f3ca2c | 920 | int nr) |
2a2e4885 JW |
921 | { |
922 | } | |
923 | ||
00f3ca2c | 924 | static inline void __mod_memcg_page_state(struct page *page, |
04fecbf5 | 925 | int idx, |
00f3ca2c | 926 | int nr) |
2a2e4885 JW |
927 | { |
928 | } | |
929 | ||
ccda7f43 | 930 | static inline void mod_memcg_page_state(struct page *page, |
04fecbf5 | 931 | int idx, |
ccda7f43 | 932 | int nr) |
553af430 JW |
933 | { |
934 | } | |
935 | ||
00f3ca2c JW |
936 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
937 | enum node_stat_item idx) | |
2a7106f2 | 938 | { |
00f3ca2c | 939 | return node_page_state(lruvec_pgdat(lruvec), idx); |
2a7106f2 GT |
940 | } |
941 | ||
00f3ca2c JW |
942 | static inline void __mod_lruvec_state(struct lruvec *lruvec, |
943 | enum node_stat_item idx, int val) | |
d69b042f | 944 | { |
00f3ca2c JW |
945 | __mod_node_page_state(lruvec_pgdat(lruvec), idx, val); |
946 | } | |
947 | ||
948 | static inline void mod_lruvec_state(struct lruvec *lruvec, | |
949 | enum node_stat_item idx, int val) | |
950 | { | |
951 | mod_node_page_state(lruvec_pgdat(lruvec), idx, val); | |
952 | } | |
953 | ||
954 | static inline void __mod_lruvec_page_state(struct page *page, | |
955 | enum node_stat_item idx, int val) | |
956 | { | |
957 | __mod_node_page_state(page_pgdat(page), idx, val); | |
958 | } | |
959 | ||
960 | static inline void mod_lruvec_page_state(struct page *page, | |
961 | enum node_stat_item idx, int val) | |
962 | { | |
963 | mod_node_page_state(page_pgdat(page), idx, val); | |
d69b042f BS |
964 | } |
965 | ||
4e416953 | 966 | static inline |
ef8f2327 | 967 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
968 | gfp_t gfp_mask, |
969 | unsigned long *total_scanned) | |
4e416953 | 970 | { |
0608f43d | 971 | return 0; |
4e416953 BS |
972 | } |
973 | ||
e94c8a9c | 974 | static inline void mem_cgroup_split_huge_fixup(struct page *head) |
ca3e0214 KH |
975 | { |
976 | } | |
977 | ||
2262185c RG |
978 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
979 | enum vm_event_item idx, | |
980 | unsigned long count) | |
981 | { | |
982 | } | |
983 | ||
984 | static inline void count_memcg_page_event(struct page *page, | |
04fecbf5 | 985 | int idx) |
2262185c RG |
986 | { |
987 | } | |
988 | ||
456f998e | 989 | static inline |
2262185c | 990 | void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx) |
456f998e YH |
991 | { |
992 | } | |
c255a458 | 993 | #endif /* CONFIG_MEMCG */ |
78fb7466 | 994 | |
04fecbf5 | 995 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 996 | static inline void __inc_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 997 | int idx) |
00f3ca2c JW |
998 | { |
999 | __mod_memcg_state(memcg, idx, 1); | |
1000 | } | |
1001 | ||
04fecbf5 | 1002 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1003 | static inline void __dec_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1004 | int idx) |
00f3ca2c JW |
1005 | { |
1006 | __mod_memcg_state(memcg, idx, -1); | |
1007 | } | |
1008 | ||
04fecbf5 | 1009 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1010 | static inline void __inc_memcg_page_state(struct page *page, |
04fecbf5 | 1011 | int idx) |
00f3ca2c JW |
1012 | { |
1013 | __mod_memcg_page_state(page, idx, 1); | |
1014 | } | |
1015 | ||
04fecbf5 | 1016 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1017 | static inline void __dec_memcg_page_state(struct page *page, |
04fecbf5 | 1018 | int idx) |
00f3ca2c JW |
1019 | { |
1020 | __mod_memcg_page_state(page, idx, -1); | |
1021 | } | |
1022 | ||
1023 | static inline void __inc_lruvec_state(struct lruvec *lruvec, | |
1024 | enum node_stat_item idx) | |
1025 | { | |
1026 | __mod_lruvec_state(lruvec, idx, 1); | |
1027 | } | |
1028 | ||
1029 | static inline void __dec_lruvec_state(struct lruvec *lruvec, | |
1030 | enum node_stat_item idx) | |
1031 | { | |
1032 | __mod_lruvec_state(lruvec, idx, -1); | |
1033 | } | |
1034 | ||
1035 | static inline void __inc_lruvec_page_state(struct page *page, | |
1036 | enum node_stat_item idx) | |
1037 | { | |
1038 | __mod_lruvec_page_state(page, idx, 1); | |
1039 | } | |
1040 | ||
1041 | static inline void __dec_lruvec_page_state(struct page *page, | |
1042 | enum node_stat_item idx) | |
1043 | { | |
1044 | __mod_lruvec_page_state(page, idx, -1); | |
1045 | } | |
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 | ||
52ebea74 | 1099 | #ifdef CONFIG_CGROUP_WRITEBACK |
841710aa | 1100 | |
52ebea74 | 1101 | struct list_head *mem_cgroup_cgwb_list(struct mem_cgroup *memcg); |
841710aa | 1102 | struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb); |
c5edf9cd TH |
1103 | void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages, |
1104 | unsigned long *pheadroom, unsigned long *pdirty, | |
1105 | unsigned long *pwriteback); | |
841710aa TH |
1106 | |
1107 | #else /* CONFIG_CGROUP_WRITEBACK */ | |
1108 | ||
1109 | static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb) | |
1110 | { | |
1111 | return NULL; | |
1112 | } | |
1113 | ||
c2aa723a | 1114 | static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb, |
c5edf9cd TH |
1115 | unsigned long *pfilepages, |
1116 | unsigned long *pheadroom, | |
c2aa723a TH |
1117 | unsigned long *pdirty, |
1118 | unsigned long *pwriteback) | |
1119 | { | |
1120 | } | |
1121 | ||
841710aa | 1122 | #endif /* CONFIG_CGROUP_WRITEBACK */ |
52ebea74 | 1123 | |
e1aab161 | 1124 | struct sock; |
baac50bb JW |
1125 | bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); |
1126 | void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); | |
d886f4e4 | 1127 | #ifdef CONFIG_MEMCG |
ef12947c JW |
1128 | extern struct static_key_false memcg_sockets_enabled_key; |
1129 | #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key) | |
2d758073 JW |
1130 | void mem_cgroup_sk_alloc(struct sock *sk); |
1131 | void mem_cgroup_sk_free(struct sock *sk); | |
baac50bb | 1132 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c | 1133 | { |
0db15298 | 1134 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && memcg->tcpmem_pressure) |
8e8ae645 | 1135 | return true; |
8e8ae645 JW |
1136 | do { |
1137 | if (time_before(jiffies, memcg->socket_pressure)) | |
1138 | return true; | |
1139 | } while ((memcg = parent_mem_cgroup(memcg))); | |
1140 | return false; | |
e805605c JW |
1141 | } |
1142 | #else | |
80e95fe0 | 1143 | #define mem_cgroup_sockets_enabled 0 |
2d758073 JW |
1144 | static inline void mem_cgroup_sk_alloc(struct sock *sk) { }; |
1145 | static inline void mem_cgroup_sk_free(struct sock *sk) { }; | |
baac50bb | 1146 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c JW |
1147 | { |
1148 | return false; | |
1149 | } | |
1150 | #endif | |
7ae1e1d0 | 1151 | |
45264778 VD |
1152 | struct kmem_cache *memcg_kmem_get_cache(struct kmem_cache *cachep); |
1153 | void memcg_kmem_put_cache(struct kmem_cache *cachep); | |
1154 | int memcg_kmem_charge_memcg(struct page *page, gfp_t gfp, int order, | |
1155 | struct mem_cgroup *memcg); | |
1156 | int memcg_kmem_charge(struct page *page, gfp_t gfp, int order); | |
1157 | void memcg_kmem_uncharge(struct page *page, int order); | |
1158 | ||
127424c8 | 1159 | #if defined(CONFIG_MEMCG) && !defined(CONFIG_SLOB) |
ef12947c | 1160 | extern struct static_key_false memcg_kmem_enabled_key; |
17cc4dfe | 1161 | extern struct workqueue_struct *memcg_kmem_cache_wq; |
749c5415 | 1162 | |
dbcf73e2 | 1163 | extern int memcg_nr_cache_ids; |
64219994 MH |
1164 | void memcg_get_cache_ids(void); |
1165 | void memcg_put_cache_ids(void); | |
ebe945c2 GC |
1166 | |
1167 | /* | |
1168 | * Helper macro to loop through all memcg-specific caches. Callers must still | |
1169 | * check if the cache is valid (it is either valid or NULL). | |
1170 | * the slab_mutex must be held when looping through those caches | |
1171 | */ | |
749c5415 | 1172 | #define for_each_memcg_cache_index(_idx) \ |
dbcf73e2 | 1173 | for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++) |
749c5415 | 1174 | |
7ae1e1d0 GC |
1175 | static inline bool memcg_kmem_enabled(void) |
1176 | { | |
ef12947c | 1177 | return static_branch_unlikely(&memcg_kmem_enabled_key); |
7ae1e1d0 GC |
1178 | } |
1179 | ||
33398cf2 | 1180 | /* |
9f706d68 | 1181 | * helper for accessing a memcg's index. It will be used as an index in the |
33398cf2 MH |
1182 | * child cache array in kmem_cache, and also to derive its name. This function |
1183 | * will return -1 when this is not a kmem-limited memcg. | |
1184 | */ | |
1185 | static inline int memcg_cache_id(struct mem_cgroup *memcg) | |
1186 | { | |
1187 | return memcg ? memcg->kmemcg_id : -1; | |
1188 | } | |
5722d094 | 1189 | |
7ae1e1d0 | 1190 | #else |
749c5415 GC |
1191 | #define for_each_memcg_cache_index(_idx) \ |
1192 | for (; NULL; ) | |
1193 | ||
b9ce5ef4 GC |
1194 | static inline bool memcg_kmem_enabled(void) |
1195 | { | |
1196 | return false; | |
1197 | } | |
1198 | ||
2633d7a0 GC |
1199 | static inline int memcg_cache_id(struct mem_cgroup *memcg) |
1200 | { | |
1201 | return -1; | |
1202 | } | |
1203 | ||
05257a1a VD |
1204 | static inline void memcg_get_cache_ids(void) |
1205 | { | |
1206 | } | |
1207 | ||
1208 | static inline void memcg_put_cache_ids(void) | |
1209 | { | |
1210 | } | |
1211 | ||
127424c8 JW |
1212 | #endif /* CONFIG_MEMCG && !CONFIG_SLOB */ |
1213 | ||
8cdea7c0 | 1214 | #endif /* _LINUX_MEMCONTROL_H */ |