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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> |
456f998e | 26 | |
78fb7466 PE |
27 | struct mem_cgroup; |
28 | struct page_cgroup; | |
8697d331 BS |
29 | struct page; |
30 | struct mm_struct; | |
2633d7a0 | 31 | struct kmem_cache; |
78fb7466 | 32 | |
68b4876d SZ |
33 | /* |
34 | * The corresponding mem_cgroup_stat_names is defined in mm/memcontrol.c, | |
35 | * These two lists should keep in accord with each other. | |
36 | */ | |
37 | enum mem_cgroup_stat_index { | |
38 | /* | |
39 | * For MEM_CONTAINER_TYPE_ALL, usage = pagecache + rss. | |
40 | */ | |
41 | MEM_CGROUP_STAT_CACHE, /* # of pages charged as cache */ | |
42 | MEM_CGROUP_STAT_RSS, /* # of pages charged as anon rss */ | |
43 | MEM_CGROUP_STAT_RSS_HUGE, /* # of pages charged as anon huge */ | |
44 | MEM_CGROUP_STAT_FILE_MAPPED, /* # of pages charged as file rss */ | |
3ea67d06 | 45 | MEM_CGROUP_STAT_WRITEBACK, /* # of pages under writeback */ |
68b4876d SZ |
46 | MEM_CGROUP_STAT_SWAP, /* # of pages, swapped out */ |
47 | MEM_CGROUP_STAT_NSTATS, | |
2a7106f2 GT |
48 | }; |
49 | ||
5660048c JW |
50 | struct mem_cgroup_reclaim_cookie { |
51 | struct zone *zone; | |
52 | int priority; | |
53 | unsigned int generation; | |
54 | }; | |
55 | ||
c255a458 | 56 | #ifdef CONFIG_MEMCG |
00501b53 JW |
57 | int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
58 | gfp_t gfp_mask, struct mem_cgroup **memcgp); | |
59 | void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg, | |
60 | bool lrucare); | |
61 | void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg); | |
0a31bc97 | 62 | void mem_cgroup_uncharge(struct page *page); |
747db954 | 63 | void mem_cgroup_uncharge_list(struct list_head *page_list); |
569b846d | 64 | |
0a31bc97 JW |
65 | void mem_cgroup_migrate(struct page *oldpage, struct page *newpage, |
66 | bool lrucare); | |
569b846d | 67 | |
0a31bc97 JW |
68 | struct lruvec *mem_cgroup_zone_lruvec(struct zone *, struct mem_cgroup *); |
69 | struct lruvec *mem_cgroup_page_lruvec(struct page *, struct zone *); | |
c9b0ed51 | 70 | |
c3ac9a8a JW |
71 | bool __mem_cgroup_same_or_subtree(const struct mem_cgroup *root_memcg, |
72 | struct mem_cgroup *memcg); | |
ffbdccf5 DR |
73 | bool task_in_mem_cgroup(struct task_struct *task, |
74 | const struct mem_cgroup *memcg); | |
3062fc67 | 75 | |
e42d9d5d | 76 | extern struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page); |
cf475ad2 BS |
77 | extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
78 | ||
e1aab161 | 79 | extern struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg); |
182446d0 | 80 | extern struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css); |
e1aab161 | 81 | |
2e4d4091 | 82 | static inline |
587af308 | 83 | bool mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *memcg) |
2e4d4091 | 84 | { |
587af308 | 85 | struct mem_cgroup *task_memcg; |
413918bb | 86 | bool match = false; |
c3ac9a8a | 87 | |
2e4d4091 | 88 | rcu_read_lock(); |
587af308 | 89 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
413918bb JW |
90 | if (task_memcg) |
91 | match = __mem_cgroup_same_or_subtree(memcg, task_memcg); | |
2e4d4091 | 92 | rcu_read_unlock(); |
c3ac9a8a | 93 | return match; |
2e4d4091 | 94 | } |
8a9f3ccd | 95 | |
c0ff4b85 | 96 | extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *memcg); |
d324236b | 97 | |
694fbc0f AM |
98 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
99 | struct mem_cgroup *, | |
100 | struct mem_cgroup_reclaim_cookie *); | |
5660048c JW |
101 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); |
102 | ||
58ae83db KH |
103 | /* |
104 | * For memory reclaim. | |
105 | */ | |
c56d5c7d | 106 | int mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec); |
889976db | 107 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
4d7dcca2 | 108 | unsigned long mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list); |
fa9add64 | 109 | void mem_cgroup_update_lru_size(struct lruvec *, enum lru_list, int); |
e222432b BS |
110 | extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, |
111 | struct task_struct *p); | |
58ae83db | 112 | |
49426420 | 113 | static inline void mem_cgroup_oom_enable(void) |
519e5247 | 114 | { |
49426420 JW |
115 | WARN_ON(current->memcg_oom.may_oom); |
116 | current->memcg_oom.may_oom = 1; | |
519e5247 JW |
117 | } |
118 | ||
49426420 | 119 | static inline void mem_cgroup_oom_disable(void) |
519e5247 | 120 | { |
49426420 JW |
121 | WARN_ON(!current->memcg_oom.may_oom); |
122 | current->memcg_oom.may_oom = 0; | |
519e5247 JW |
123 | } |
124 | ||
3812c8c8 JW |
125 | static inline bool task_in_memcg_oom(struct task_struct *p) |
126 | { | |
49426420 | 127 | return p->memcg_oom.memcg; |
3812c8c8 JW |
128 | } |
129 | ||
49426420 | 130 | bool mem_cgroup_oom_synchronize(bool wait); |
3812c8c8 | 131 | |
c255a458 | 132 | #ifdef CONFIG_MEMCG_SWAP |
c077719b KH |
133 | extern int do_swap_account; |
134 | #endif | |
f8d66542 HT |
135 | |
136 | static inline bool mem_cgroup_disabled(void) | |
137 | { | |
073219e9 | 138 | if (memory_cgrp_subsys.disabled) |
f8d66542 HT |
139 | return true; |
140 | return false; | |
141 | } | |
142 | ||
d7365e78 JW |
143 | struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page, bool *locked, |
144 | unsigned long *flags); | |
145 | void mem_cgroup_end_page_stat(struct mem_cgroup *memcg, bool locked, | |
146 | unsigned long flags); | |
147 | void mem_cgroup_update_page_stat(struct mem_cgroup *memcg, | |
148 | enum mem_cgroup_stat_index idx, int val); | |
149 | ||
150 | static inline void mem_cgroup_inc_page_stat(struct mem_cgroup *memcg, | |
68b4876d | 151 | enum mem_cgroup_stat_index idx) |
2a7106f2 | 152 | { |
d7365e78 | 153 | mem_cgroup_update_page_stat(memcg, idx, 1); |
2a7106f2 GT |
154 | } |
155 | ||
d7365e78 | 156 | static inline void mem_cgroup_dec_page_stat(struct mem_cgroup *memcg, |
68b4876d | 157 | enum mem_cgroup_stat_index idx) |
2a7106f2 | 158 | { |
d7365e78 | 159 | mem_cgroup_update_page_stat(memcg, idx, -1); |
2a7106f2 GT |
160 | } |
161 | ||
0608f43d AM |
162 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
163 | gfp_t gfp_mask, | |
164 | unsigned long *total_scanned); | |
a63d83f4 | 165 | |
68ae564b DR |
166 | void __mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx); |
167 | static inline void mem_cgroup_count_vm_event(struct mm_struct *mm, | |
168 | enum vm_event_item idx) | |
169 | { | |
170 | if (mem_cgroup_disabled()) | |
171 | return; | |
172 | __mem_cgroup_count_vm_event(mm, idx); | |
173 | } | |
ca3e0214 | 174 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
e94c8a9c | 175 | void mem_cgroup_split_huge_fixup(struct page *head); |
ca3e0214 KH |
176 | #endif |
177 | ||
f212ad7c DN |
178 | #ifdef CONFIG_DEBUG_VM |
179 | bool mem_cgroup_bad_page_check(struct page *page); | |
180 | void mem_cgroup_print_bad_page(struct page *page); | |
181 | #endif | |
c255a458 | 182 | #else /* CONFIG_MEMCG */ |
7a81b88c KH |
183 | struct mem_cgroup; |
184 | ||
00501b53 JW |
185 | static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
186 | gfp_t gfp_mask, | |
187 | struct mem_cgroup **memcgp) | |
7a81b88c | 188 | { |
00501b53 | 189 | *memcgp = NULL; |
7a81b88c KH |
190 | return 0; |
191 | } | |
192 | ||
00501b53 JW |
193 | static inline void mem_cgroup_commit_charge(struct page *page, |
194 | struct mem_cgroup *memcg, | |
195 | bool lrucare) | |
7a81b88c KH |
196 | { |
197 | } | |
198 | ||
00501b53 JW |
199 | static inline void mem_cgroup_cancel_charge(struct page *page, |
200 | struct mem_cgroup *memcg) | |
7a81b88c KH |
201 | { |
202 | } | |
203 | ||
0a31bc97 | 204 | static inline void mem_cgroup_uncharge(struct page *page) |
569b846d KH |
205 | { |
206 | } | |
207 | ||
747db954 | 208 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
8a9f3ccd BS |
209 | { |
210 | } | |
211 | ||
0a31bc97 JW |
212 | static inline void mem_cgroup_migrate(struct page *oldpage, |
213 | struct page *newpage, | |
214 | bool lrucare) | |
69029cd5 KH |
215 | { |
216 | } | |
217 | ||
925b7673 JW |
218 | static inline struct lruvec *mem_cgroup_zone_lruvec(struct zone *zone, |
219 | struct mem_cgroup *memcg) | |
08e552c6 | 220 | { |
925b7673 | 221 | return &zone->lruvec; |
08e552c6 KH |
222 | } |
223 | ||
fa9add64 HD |
224 | static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, |
225 | struct zone *zone) | |
66e1707b | 226 | { |
925b7673 | 227 | return &zone->lruvec; |
66e1707b BS |
228 | } |
229 | ||
e42d9d5d WF |
230 | static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page) |
231 | { | |
232 | return NULL; | |
233 | } | |
234 | ||
587af308 | 235 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
c0ff4b85 | 236 | struct mem_cgroup *memcg) |
bed7161a | 237 | { |
587af308 | 238 | return true; |
bed7161a BS |
239 | } |
240 | ||
ffbdccf5 DR |
241 | static inline bool task_in_mem_cgroup(struct task_struct *task, |
242 | const struct mem_cgroup *memcg) | |
4c4a2214 | 243 | { |
ffbdccf5 | 244 | return true; |
4c4a2214 DR |
245 | } |
246 | ||
c0ff4b85 R |
247 | static inline struct cgroup_subsys_state |
248 | *mem_cgroup_css(struct mem_cgroup *memcg) | |
d324236b WF |
249 | { |
250 | return NULL; | |
251 | } | |
252 | ||
5660048c JW |
253 | static inline struct mem_cgroup * |
254 | mem_cgroup_iter(struct mem_cgroup *root, | |
255 | struct mem_cgroup *prev, | |
256 | struct mem_cgroup_reclaim_cookie *reclaim) | |
257 | { | |
258 | return NULL; | |
259 | } | |
260 | ||
261 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
262 | struct mem_cgroup *prev) | |
263 | { | |
264 | } | |
265 | ||
f8d66542 HT |
266 | static inline bool mem_cgroup_disabled(void) |
267 | { | |
268 | return true; | |
269 | } | |
a636b327 | 270 | |
14797e23 | 271 | static inline int |
c56d5c7d | 272 | mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec) |
14797e23 KM |
273 | { |
274 | return 1; | |
275 | } | |
276 | ||
a3d8e054 | 277 | static inline unsigned long |
4d7dcca2 | 278 | mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru) |
a3d8e054 KM |
279 | { |
280 | return 0; | |
281 | } | |
282 | ||
fa9add64 HD |
283 | static inline void |
284 | mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, | |
285 | int increment) | |
3e2f41f1 | 286 | { |
3e2f41f1 KM |
287 | } |
288 | ||
e222432b BS |
289 | static inline void |
290 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) | |
291 | { | |
292 | } | |
293 | ||
d7365e78 | 294 | static inline struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page, |
89c06bd5 KH |
295 | bool *locked, unsigned long *flags) |
296 | { | |
d7365e78 | 297 | return NULL; |
89c06bd5 KH |
298 | } |
299 | ||
d7365e78 JW |
300 | static inline void mem_cgroup_end_page_stat(struct mem_cgroup *memcg, |
301 | bool locked, unsigned long flags) | |
89c06bd5 KH |
302 | { |
303 | } | |
304 | ||
49426420 | 305 | static inline void mem_cgroup_oom_enable(void) |
519e5247 JW |
306 | { |
307 | } | |
308 | ||
49426420 | 309 | static inline void mem_cgroup_oom_disable(void) |
519e5247 JW |
310 | { |
311 | } | |
312 | ||
3812c8c8 JW |
313 | static inline bool task_in_memcg_oom(struct task_struct *p) |
314 | { | |
315 | return false; | |
316 | } | |
317 | ||
49426420 | 318 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
3812c8c8 JW |
319 | { |
320 | return false; | |
321 | } | |
322 | ||
d7365e78 | 323 | static inline void mem_cgroup_inc_page_stat(struct mem_cgroup *memcg, |
68b4876d | 324 | enum mem_cgroup_stat_index idx) |
2a7106f2 GT |
325 | { |
326 | } | |
327 | ||
d7365e78 | 328 | static inline void mem_cgroup_dec_page_stat(struct mem_cgroup *memcg, |
68b4876d | 329 | enum mem_cgroup_stat_index idx) |
d69b042f BS |
330 | { |
331 | } | |
332 | ||
4e416953 | 333 | static inline |
0608f43d AM |
334 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
335 | gfp_t gfp_mask, | |
336 | unsigned long *total_scanned) | |
4e416953 | 337 | { |
0608f43d | 338 | return 0; |
4e416953 BS |
339 | } |
340 | ||
e94c8a9c | 341 | static inline void mem_cgroup_split_huge_fixup(struct page *head) |
ca3e0214 KH |
342 | { |
343 | } | |
344 | ||
456f998e YH |
345 | static inline |
346 | void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx) | |
347 | { | |
348 | } | |
c255a458 | 349 | #endif /* CONFIG_MEMCG */ |
78fb7466 | 350 | |
c255a458 | 351 | #if !defined(CONFIG_MEMCG) || !defined(CONFIG_DEBUG_VM) |
f212ad7c DN |
352 | static inline bool |
353 | mem_cgroup_bad_page_check(struct page *page) | |
354 | { | |
355 | return false; | |
356 | } | |
357 | ||
358 | static inline void | |
359 | mem_cgroup_print_bad_page(struct page *page) | |
360 | { | |
361 | } | |
362 | #endif | |
363 | ||
e1aab161 GC |
364 | enum { |
365 | UNDER_LIMIT, | |
366 | SOFT_LIMIT, | |
367 | OVER_LIMIT, | |
368 | }; | |
369 | ||
370 | struct sock; | |
cd59085a | 371 | #if defined(CONFIG_INET) && defined(CONFIG_MEMCG_KMEM) |
e1aab161 GC |
372 | void sock_update_memcg(struct sock *sk); |
373 | void sock_release_memcg(struct sock *sk); | |
374 | #else | |
375 | static inline void sock_update_memcg(struct sock *sk) | |
376 | { | |
377 | } | |
378 | static inline void sock_release_memcg(struct sock *sk) | |
379 | { | |
380 | } | |
cd59085a | 381 | #endif /* CONFIG_INET && CONFIG_MEMCG_KMEM */ |
7ae1e1d0 GC |
382 | |
383 | #ifdef CONFIG_MEMCG_KMEM | |
a8964b9b | 384 | extern struct static_key memcg_kmem_enabled_key; |
749c5415 GC |
385 | |
386 | extern int memcg_limited_groups_array_size; | |
ebe945c2 GC |
387 | |
388 | /* | |
389 | * Helper macro to loop through all memcg-specific caches. Callers must still | |
390 | * check if the cache is valid (it is either valid or NULL). | |
391 | * the slab_mutex must be held when looping through those caches | |
392 | */ | |
749c5415 | 393 | #define for_each_memcg_cache_index(_idx) \ |
91c777d8 | 394 | for ((_idx) = 0; (_idx) < memcg_limited_groups_array_size; (_idx)++) |
749c5415 | 395 | |
7ae1e1d0 GC |
396 | static inline bool memcg_kmem_enabled(void) |
397 | { | |
a8964b9b | 398 | return static_key_false(&memcg_kmem_enabled_key); |
7ae1e1d0 GC |
399 | } |
400 | ||
401 | /* | |
402 | * In general, we'll do everything in our power to not incur in any overhead | |
403 | * for non-memcg users for the kmem functions. Not even a function call, if we | |
404 | * can avoid it. | |
405 | * | |
406 | * Therefore, we'll inline all those functions so that in the best case, we'll | |
407 | * see that kmemcg is off for everybody and proceed quickly. If it is on, | |
408 | * we'll still do most of the flag checking inline. We check a lot of | |
409 | * conditions, but because they are pretty simple, they are expected to be | |
410 | * fast. | |
411 | */ | |
412 | bool __memcg_kmem_newpage_charge(gfp_t gfp, struct mem_cgroup **memcg, | |
413 | int order); | |
414 | void __memcg_kmem_commit_charge(struct page *page, | |
415 | struct mem_cgroup *memcg, int order); | |
416 | void __memcg_kmem_uncharge_pages(struct page *page, int order); | |
417 | ||
2633d7a0 | 418 | int memcg_cache_id(struct mem_cgroup *memcg); |
5722d094 | 419 | |
55007d84 | 420 | void memcg_update_array_size(int num_groups); |
d7f25f8a GC |
421 | |
422 | struct kmem_cache * | |
423 | __memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp); | |
424 | ||
c67a8a68 VD |
425 | int __memcg_charge_slab(struct kmem_cache *cachep, gfp_t gfp, int order); |
426 | void __memcg_uncharge_slab(struct kmem_cache *cachep, int order); | |
5dfb4175 | 427 | |
776ed0f0 | 428 | int __memcg_cleanup_cache_params(struct kmem_cache *s); |
1f458cbf | 429 | |
7ae1e1d0 GC |
430 | /** |
431 | * memcg_kmem_newpage_charge: verify if a new kmem allocation is allowed. | |
432 | * @gfp: the gfp allocation flags. | |
433 | * @memcg: a pointer to the memcg this was charged against. | |
434 | * @order: allocation order. | |
435 | * | |
436 | * returns true if the memcg where the current task belongs can hold this | |
437 | * allocation. | |
438 | * | |
439 | * We return true automatically if this allocation is not to be accounted to | |
440 | * any memcg. | |
441 | */ | |
442 | static inline bool | |
443 | memcg_kmem_newpage_charge(gfp_t gfp, struct mem_cgroup **memcg, int order) | |
444 | { | |
445 | if (!memcg_kmem_enabled()) | |
446 | return true; | |
447 | ||
448 | /* | |
449 | * __GFP_NOFAIL allocations will move on even if charging is not | |
450 | * possible. Therefore we don't even try, and have this allocation | |
3e32cb2e JW |
451 | * unaccounted. We could in theory charge it forcibly, but we hope |
452 | * those allocations are rare, and won't be worth the trouble. | |
7ae1e1d0 | 453 | */ |
52383431 | 454 | if (gfp & __GFP_NOFAIL) |
7ae1e1d0 GC |
455 | return true; |
456 | if (in_interrupt() || (!current->mm) || (current->flags & PF_KTHREAD)) | |
457 | return true; | |
458 | ||
459 | /* If the test is dying, just let it go. */ | |
460 | if (unlikely(fatal_signal_pending(current))) | |
461 | return true; | |
462 | ||
463 | return __memcg_kmem_newpage_charge(gfp, memcg, order); | |
464 | } | |
465 | ||
466 | /** | |
467 | * memcg_kmem_uncharge_pages: uncharge pages from memcg | |
468 | * @page: pointer to struct page being freed | |
469 | * @order: allocation order. | |
470 | * | |
471 | * there is no need to specify memcg here, since it is embedded in page_cgroup | |
472 | */ | |
473 | static inline void | |
474 | memcg_kmem_uncharge_pages(struct page *page, int order) | |
475 | { | |
476 | if (memcg_kmem_enabled()) | |
477 | __memcg_kmem_uncharge_pages(page, order); | |
478 | } | |
479 | ||
480 | /** | |
481 | * memcg_kmem_commit_charge: embeds correct memcg in a page | |
482 | * @page: pointer to struct page recently allocated | |
483 | * @memcg: the memcg structure we charged against | |
484 | * @order: allocation order. | |
485 | * | |
486 | * Needs to be called after memcg_kmem_newpage_charge, regardless of success or | |
487 | * failure of the allocation. if @page is NULL, this function will revert the | |
488 | * charges. Otherwise, it will commit the memcg given by @memcg to the | |
489 | * corresponding page_cgroup. | |
490 | */ | |
491 | static inline void | |
492 | memcg_kmem_commit_charge(struct page *page, struct mem_cgroup *memcg, int order) | |
493 | { | |
494 | if (memcg_kmem_enabled() && memcg) | |
495 | __memcg_kmem_commit_charge(page, memcg, order); | |
496 | } | |
497 | ||
d7f25f8a GC |
498 | /** |
499 | * memcg_kmem_get_cache: selects the correct per-memcg cache for allocation | |
500 | * @cachep: the original global kmem cache | |
501 | * @gfp: allocation flags. | |
502 | * | |
5dfb4175 | 503 | * All memory allocated from a per-memcg cache is charged to the owner memcg. |
d7f25f8a GC |
504 | */ |
505 | static __always_inline struct kmem_cache * | |
506 | memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp) | |
507 | { | |
508 | if (!memcg_kmem_enabled()) | |
509 | return cachep; | |
510 | if (gfp & __GFP_NOFAIL) | |
511 | return cachep; | |
512 | if (in_interrupt() || (!current->mm) || (current->flags & PF_KTHREAD)) | |
513 | return cachep; | |
514 | if (unlikely(fatal_signal_pending(current))) | |
515 | return cachep; | |
516 | ||
517 | return __memcg_kmem_get_cache(cachep, gfp); | |
518 | } | |
7ae1e1d0 | 519 | #else |
749c5415 GC |
520 | #define for_each_memcg_cache_index(_idx) \ |
521 | for (; NULL; ) | |
522 | ||
b9ce5ef4 GC |
523 | static inline bool memcg_kmem_enabled(void) |
524 | { | |
525 | return false; | |
526 | } | |
527 | ||
7ae1e1d0 GC |
528 | static inline bool |
529 | memcg_kmem_newpage_charge(gfp_t gfp, struct mem_cgroup **memcg, int order) | |
530 | { | |
531 | return true; | |
532 | } | |
533 | ||
534 | static inline void memcg_kmem_uncharge_pages(struct page *page, int order) | |
535 | { | |
536 | } | |
537 | ||
538 | static inline void | |
539 | memcg_kmem_commit_charge(struct page *page, struct mem_cgroup *memcg, int order) | |
540 | { | |
541 | } | |
2633d7a0 GC |
542 | |
543 | static inline int memcg_cache_id(struct mem_cgroup *memcg) | |
544 | { | |
545 | return -1; | |
546 | } | |
547 | ||
d7f25f8a GC |
548 | static inline struct kmem_cache * |
549 | memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp) | |
550 | { | |
551 | return cachep; | |
552 | } | |
7ae1e1d0 | 553 | #endif /* CONFIG_MEMCG_KMEM */ |
8cdea7c0 BS |
554 | #endif /* _LINUX_MEMCONTROL_H */ |
555 |