]>
Commit | Line | Data |
---|---|---|
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 JW |
85 | struct mem_cgroup *task_memcg; |
86 | bool match; | |
c3ac9a8a | 87 | |
2e4d4091 | 88 | rcu_read_lock(); |
587af308 JW |
89 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
90 | match = __mem_cgroup_same_or_subtree(memcg, task_memcg); | |
2e4d4091 | 91 | rcu_read_unlock(); |
c3ac9a8a | 92 | return match; |
2e4d4091 | 93 | } |
8a9f3ccd | 94 | |
c0ff4b85 | 95 | extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *memcg); |
d324236b | 96 | |
694fbc0f AM |
97 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
98 | struct mem_cgroup *, | |
99 | struct mem_cgroup_reclaim_cookie *); | |
5660048c JW |
100 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); |
101 | ||
58ae83db KH |
102 | /* |
103 | * For memory reclaim. | |
104 | */ | |
c56d5c7d | 105 | int mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec); |
889976db | 106 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
4d7dcca2 | 107 | unsigned long mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list); |
fa9add64 | 108 | void mem_cgroup_update_lru_size(struct lruvec *, enum lru_list, int); |
e222432b BS |
109 | extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, |
110 | struct task_struct *p); | |
58ae83db | 111 | |
49426420 | 112 | static inline void mem_cgroup_oom_enable(void) |
519e5247 | 113 | { |
49426420 JW |
114 | WARN_ON(current->memcg_oom.may_oom); |
115 | current->memcg_oom.may_oom = 1; | |
519e5247 JW |
116 | } |
117 | ||
49426420 | 118 | static inline void mem_cgroup_oom_disable(void) |
519e5247 | 119 | { |
49426420 JW |
120 | WARN_ON(!current->memcg_oom.may_oom); |
121 | current->memcg_oom.may_oom = 0; | |
519e5247 JW |
122 | } |
123 | ||
3812c8c8 JW |
124 | static inline bool task_in_memcg_oom(struct task_struct *p) |
125 | { | |
49426420 | 126 | return p->memcg_oom.memcg; |
3812c8c8 JW |
127 | } |
128 | ||
49426420 | 129 | bool mem_cgroup_oom_synchronize(bool wait); |
3812c8c8 | 130 | |
c255a458 | 131 | #ifdef CONFIG_MEMCG_SWAP |
c077719b KH |
132 | extern int do_swap_account; |
133 | #endif | |
f8d66542 HT |
134 | |
135 | static inline bool mem_cgroup_disabled(void) | |
136 | { | |
073219e9 | 137 | if (memory_cgrp_subsys.disabled) |
f8d66542 HT |
138 | return true; |
139 | return false; | |
140 | } | |
141 | ||
89c06bd5 KH |
142 | void __mem_cgroup_begin_update_page_stat(struct page *page, bool *locked, |
143 | unsigned long *flags); | |
144 | ||
4331f7d3 KH |
145 | extern atomic_t memcg_moving; |
146 | ||
89c06bd5 KH |
147 | static inline void mem_cgroup_begin_update_page_stat(struct page *page, |
148 | bool *locked, unsigned long *flags) | |
149 | { | |
150 | if (mem_cgroup_disabled()) | |
151 | return; | |
152 | rcu_read_lock(); | |
153 | *locked = false; | |
4331f7d3 KH |
154 | if (atomic_read(&memcg_moving)) |
155 | __mem_cgroup_begin_update_page_stat(page, locked, flags); | |
89c06bd5 KH |
156 | } |
157 | ||
158 | void __mem_cgroup_end_update_page_stat(struct page *page, | |
159 | unsigned long *flags); | |
160 | static inline void mem_cgroup_end_update_page_stat(struct page *page, | |
161 | bool *locked, unsigned long *flags) | |
162 | { | |
163 | if (mem_cgroup_disabled()) | |
164 | return; | |
165 | if (*locked) | |
166 | __mem_cgroup_end_update_page_stat(page, flags); | |
167 | rcu_read_unlock(); | |
168 | } | |
169 | ||
2a7106f2 | 170 | void mem_cgroup_update_page_stat(struct page *page, |
68b4876d | 171 | enum mem_cgroup_stat_index idx, |
2a7106f2 GT |
172 | int val); |
173 | ||
174 | static inline void mem_cgroup_inc_page_stat(struct page *page, | |
68b4876d | 175 | enum mem_cgroup_stat_index idx) |
2a7106f2 GT |
176 | { |
177 | mem_cgroup_update_page_stat(page, idx, 1); | |
178 | } | |
179 | ||
180 | static inline void mem_cgroup_dec_page_stat(struct page *page, | |
68b4876d | 181 | enum mem_cgroup_stat_index idx) |
2a7106f2 GT |
182 | { |
183 | mem_cgroup_update_page_stat(page, idx, -1); | |
184 | } | |
185 | ||
0608f43d AM |
186 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
187 | gfp_t gfp_mask, | |
188 | unsigned long *total_scanned); | |
a63d83f4 | 189 | |
68ae564b DR |
190 | void __mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx); |
191 | static inline void mem_cgroup_count_vm_event(struct mm_struct *mm, | |
192 | enum vm_event_item idx) | |
193 | { | |
194 | if (mem_cgroup_disabled()) | |
195 | return; | |
196 | __mem_cgroup_count_vm_event(mm, idx); | |
197 | } | |
ca3e0214 | 198 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
e94c8a9c | 199 | void mem_cgroup_split_huge_fixup(struct page *head); |
ca3e0214 KH |
200 | #endif |
201 | ||
f212ad7c DN |
202 | #ifdef CONFIG_DEBUG_VM |
203 | bool mem_cgroup_bad_page_check(struct page *page); | |
204 | void mem_cgroup_print_bad_page(struct page *page); | |
205 | #endif | |
c255a458 | 206 | #else /* CONFIG_MEMCG */ |
7a81b88c KH |
207 | struct mem_cgroup; |
208 | ||
00501b53 JW |
209 | static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
210 | gfp_t gfp_mask, | |
211 | struct mem_cgroup **memcgp) | |
7a81b88c | 212 | { |
00501b53 | 213 | *memcgp = NULL; |
7a81b88c KH |
214 | return 0; |
215 | } | |
216 | ||
00501b53 JW |
217 | static inline void mem_cgroup_commit_charge(struct page *page, |
218 | struct mem_cgroup *memcg, | |
219 | bool lrucare) | |
7a81b88c KH |
220 | { |
221 | } | |
222 | ||
00501b53 JW |
223 | static inline void mem_cgroup_cancel_charge(struct page *page, |
224 | struct mem_cgroup *memcg) | |
7a81b88c KH |
225 | { |
226 | } | |
227 | ||
0a31bc97 | 228 | static inline void mem_cgroup_uncharge(struct page *page) |
569b846d KH |
229 | { |
230 | } | |
231 | ||
747db954 | 232 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
8a9f3ccd BS |
233 | { |
234 | } | |
235 | ||
0a31bc97 JW |
236 | static inline void mem_cgroup_migrate(struct page *oldpage, |
237 | struct page *newpage, | |
238 | bool lrucare) | |
69029cd5 KH |
239 | { |
240 | } | |
241 | ||
925b7673 JW |
242 | static inline struct lruvec *mem_cgroup_zone_lruvec(struct zone *zone, |
243 | struct mem_cgroup *memcg) | |
08e552c6 | 244 | { |
925b7673 | 245 | return &zone->lruvec; |
08e552c6 KH |
246 | } |
247 | ||
fa9add64 HD |
248 | static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, |
249 | struct zone *zone) | |
66e1707b | 250 | { |
925b7673 | 251 | return &zone->lruvec; |
66e1707b BS |
252 | } |
253 | ||
e42d9d5d WF |
254 | static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page) |
255 | { | |
256 | return NULL; | |
257 | } | |
258 | ||
587af308 | 259 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
c0ff4b85 | 260 | struct mem_cgroup *memcg) |
bed7161a | 261 | { |
587af308 | 262 | return true; |
bed7161a BS |
263 | } |
264 | ||
ffbdccf5 DR |
265 | static inline bool task_in_mem_cgroup(struct task_struct *task, |
266 | const struct mem_cgroup *memcg) | |
4c4a2214 | 267 | { |
ffbdccf5 | 268 | return true; |
4c4a2214 DR |
269 | } |
270 | ||
c0ff4b85 R |
271 | static inline struct cgroup_subsys_state |
272 | *mem_cgroup_css(struct mem_cgroup *memcg) | |
d324236b WF |
273 | { |
274 | return NULL; | |
275 | } | |
276 | ||
5660048c JW |
277 | static inline struct mem_cgroup * |
278 | mem_cgroup_iter(struct mem_cgroup *root, | |
279 | struct mem_cgroup *prev, | |
280 | struct mem_cgroup_reclaim_cookie *reclaim) | |
281 | { | |
282 | return NULL; | |
283 | } | |
284 | ||
285 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
286 | struct mem_cgroup *prev) | |
287 | { | |
288 | } | |
289 | ||
f8d66542 HT |
290 | static inline bool mem_cgroup_disabled(void) |
291 | { | |
292 | return true; | |
293 | } | |
a636b327 | 294 | |
14797e23 | 295 | static inline int |
c56d5c7d | 296 | mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec) |
14797e23 KM |
297 | { |
298 | return 1; | |
299 | } | |
300 | ||
a3d8e054 | 301 | static inline unsigned long |
4d7dcca2 | 302 | mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru) |
a3d8e054 KM |
303 | { |
304 | return 0; | |
305 | } | |
306 | ||
fa9add64 HD |
307 | static inline void |
308 | mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, | |
309 | int increment) | |
3e2f41f1 | 310 | { |
3e2f41f1 KM |
311 | } |
312 | ||
e222432b BS |
313 | static inline void |
314 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) | |
315 | { | |
316 | } | |
317 | ||
89c06bd5 KH |
318 | static inline void mem_cgroup_begin_update_page_stat(struct page *page, |
319 | bool *locked, unsigned long *flags) | |
320 | { | |
321 | } | |
322 | ||
323 | static inline void mem_cgroup_end_update_page_stat(struct page *page, | |
324 | bool *locked, unsigned long *flags) | |
325 | { | |
326 | } | |
327 | ||
49426420 | 328 | static inline void mem_cgroup_oom_enable(void) |
519e5247 JW |
329 | { |
330 | } | |
331 | ||
49426420 | 332 | static inline void mem_cgroup_oom_disable(void) |
519e5247 JW |
333 | { |
334 | } | |
335 | ||
3812c8c8 JW |
336 | static inline bool task_in_memcg_oom(struct task_struct *p) |
337 | { | |
338 | return false; | |
339 | } | |
340 | ||
49426420 | 341 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
3812c8c8 JW |
342 | { |
343 | return false; | |
344 | } | |
345 | ||
2a7106f2 | 346 | static inline void mem_cgroup_inc_page_stat(struct page *page, |
68b4876d | 347 | enum mem_cgroup_stat_index idx) |
2a7106f2 GT |
348 | { |
349 | } | |
350 | ||
351 | static inline void mem_cgroup_dec_page_stat(struct page *page, | |
68b4876d | 352 | enum mem_cgroup_stat_index idx) |
d69b042f BS |
353 | { |
354 | } | |
355 | ||
4e416953 | 356 | static inline |
0608f43d AM |
357 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
358 | gfp_t gfp_mask, | |
359 | unsigned long *total_scanned) | |
4e416953 | 360 | { |
0608f43d | 361 | return 0; |
4e416953 BS |
362 | } |
363 | ||
e94c8a9c | 364 | static inline void mem_cgroup_split_huge_fixup(struct page *head) |
ca3e0214 KH |
365 | { |
366 | } | |
367 | ||
456f998e YH |
368 | static inline |
369 | void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx) | |
370 | { | |
371 | } | |
c255a458 | 372 | #endif /* CONFIG_MEMCG */ |
78fb7466 | 373 | |
c255a458 | 374 | #if !defined(CONFIG_MEMCG) || !defined(CONFIG_DEBUG_VM) |
f212ad7c DN |
375 | static inline bool |
376 | mem_cgroup_bad_page_check(struct page *page) | |
377 | { | |
378 | return false; | |
379 | } | |
380 | ||
381 | static inline void | |
382 | mem_cgroup_print_bad_page(struct page *page) | |
383 | { | |
384 | } | |
385 | #endif | |
386 | ||
e1aab161 GC |
387 | enum { |
388 | UNDER_LIMIT, | |
389 | SOFT_LIMIT, | |
390 | OVER_LIMIT, | |
391 | }; | |
392 | ||
393 | struct sock; | |
cd59085a | 394 | #if defined(CONFIG_INET) && defined(CONFIG_MEMCG_KMEM) |
e1aab161 GC |
395 | void sock_update_memcg(struct sock *sk); |
396 | void sock_release_memcg(struct sock *sk); | |
397 | #else | |
398 | static inline void sock_update_memcg(struct sock *sk) | |
399 | { | |
400 | } | |
401 | static inline void sock_release_memcg(struct sock *sk) | |
402 | { | |
403 | } | |
cd59085a | 404 | #endif /* CONFIG_INET && CONFIG_MEMCG_KMEM */ |
7ae1e1d0 GC |
405 | |
406 | #ifdef CONFIG_MEMCG_KMEM | |
a8964b9b | 407 | extern struct static_key memcg_kmem_enabled_key; |
749c5415 GC |
408 | |
409 | extern int memcg_limited_groups_array_size; | |
ebe945c2 GC |
410 | |
411 | /* | |
412 | * Helper macro to loop through all memcg-specific caches. Callers must still | |
413 | * check if the cache is valid (it is either valid or NULL). | |
414 | * the slab_mutex must be held when looping through those caches | |
415 | */ | |
749c5415 | 416 | #define for_each_memcg_cache_index(_idx) \ |
91c777d8 | 417 | for ((_idx) = 0; (_idx) < memcg_limited_groups_array_size; (_idx)++) |
749c5415 | 418 | |
7ae1e1d0 GC |
419 | static inline bool memcg_kmem_enabled(void) |
420 | { | |
a8964b9b | 421 | return static_key_false(&memcg_kmem_enabled_key); |
7ae1e1d0 GC |
422 | } |
423 | ||
424 | /* | |
425 | * In general, we'll do everything in our power to not incur in any overhead | |
426 | * for non-memcg users for the kmem functions. Not even a function call, if we | |
427 | * can avoid it. | |
428 | * | |
429 | * Therefore, we'll inline all those functions so that in the best case, we'll | |
430 | * see that kmemcg is off for everybody and proceed quickly. If it is on, | |
431 | * we'll still do most of the flag checking inline. We check a lot of | |
432 | * conditions, but because they are pretty simple, they are expected to be | |
433 | * fast. | |
434 | */ | |
435 | bool __memcg_kmem_newpage_charge(gfp_t gfp, struct mem_cgroup **memcg, | |
436 | int order); | |
437 | void __memcg_kmem_commit_charge(struct page *page, | |
438 | struct mem_cgroup *memcg, int order); | |
439 | void __memcg_kmem_uncharge_pages(struct page *page, int order); | |
440 | ||
2633d7a0 | 441 | int memcg_cache_id(struct mem_cgroup *memcg); |
5722d094 | 442 | |
55007d84 GC |
443 | int memcg_update_cache_size(struct kmem_cache *s, int num_groups); |
444 | void memcg_update_array_size(int num_groups); | |
d7f25f8a GC |
445 | |
446 | struct kmem_cache * | |
447 | __memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp); | |
448 | ||
c67a8a68 VD |
449 | int __memcg_charge_slab(struct kmem_cache *cachep, gfp_t gfp, int order); |
450 | void __memcg_uncharge_slab(struct kmem_cache *cachep, int order); | |
5dfb4175 | 451 | |
776ed0f0 | 452 | int __memcg_cleanup_cache_params(struct kmem_cache *s); |
1f458cbf | 453 | |
7ae1e1d0 GC |
454 | /** |
455 | * memcg_kmem_newpage_charge: verify if a new kmem allocation is allowed. | |
456 | * @gfp: the gfp allocation flags. | |
457 | * @memcg: a pointer to the memcg this was charged against. | |
458 | * @order: allocation order. | |
459 | * | |
460 | * returns true if the memcg where the current task belongs can hold this | |
461 | * allocation. | |
462 | * | |
463 | * We return true automatically if this allocation is not to be accounted to | |
464 | * any memcg. | |
465 | */ | |
466 | static inline bool | |
467 | memcg_kmem_newpage_charge(gfp_t gfp, struct mem_cgroup **memcg, int order) | |
468 | { | |
469 | if (!memcg_kmem_enabled()) | |
470 | return true; | |
471 | ||
472 | /* | |
473 | * __GFP_NOFAIL allocations will move on even if charging is not | |
474 | * possible. Therefore we don't even try, and have this allocation | |
475 | * unaccounted. We could in theory charge it with | |
476 | * res_counter_charge_nofail, but we hope those allocations are rare, | |
477 | * and won't be worth the trouble. | |
478 | */ | |
52383431 | 479 | if (gfp & __GFP_NOFAIL) |
7ae1e1d0 GC |
480 | return true; |
481 | if (in_interrupt() || (!current->mm) || (current->flags & PF_KTHREAD)) | |
482 | return true; | |
483 | ||
484 | /* If the test is dying, just let it go. */ | |
485 | if (unlikely(fatal_signal_pending(current))) | |
486 | return true; | |
487 | ||
488 | return __memcg_kmem_newpage_charge(gfp, memcg, order); | |
489 | } | |
490 | ||
491 | /** | |
492 | * memcg_kmem_uncharge_pages: uncharge pages from memcg | |
493 | * @page: pointer to struct page being freed | |
494 | * @order: allocation order. | |
495 | * | |
496 | * there is no need to specify memcg here, since it is embedded in page_cgroup | |
497 | */ | |
498 | static inline void | |
499 | memcg_kmem_uncharge_pages(struct page *page, int order) | |
500 | { | |
501 | if (memcg_kmem_enabled()) | |
502 | __memcg_kmem_uncharge_pages(page, order); | |
503 | } | |
504 | ||
505 | /** | |
506 | * memcg_kmem_commit_charge: embeds correct memcg in a page | |
507 | * @page: pointer to struct page recently allocated | |
508 | * @memcg: the memcg structure we charged against | |
509 | * @order: allocation order. | |
510 | * | |
511 | * Needs to be called after memcg_kmem_newpage_charge, regardless of success or | |
512 | * failure of the allocation. if @page is NULL, this function will revert the | |
513 | * charges. Otherwise, it will commit the memcg given by @memcg to the | |
514 | * corresponding page_cgroup. | |
515 | */ | |
516 | static inline void | |
517 | memcg_kmem_commit_charge(struct page *page, struct mem_cgroup *memcg, int order) | |
518 | { | |
519 | if (memcg_kmem_enabled() && memcg) | |
520 | __memcg_kmem_commit_charge(page, memcg, order); | |
521 | } | |
522 | ||
d7f25f8a GC |
523 | /** |
524 | * memcg_kmem_get_cache: selects the correct per-memcg cache for allocation | |
525 | * @cachep: the original global kmem cache | |
526 | * @gfp: allocation flags. | |
527 | * | |
5dfb4175 | 528 | * All memory allocated from a per-memcg cache is charged to the owner memcg. |
d7f25f8a GC |
529 | */ |
530 | static __always_inline struct kmem_cache * | |
531 | memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp) | |
532 | { | |
533 | if (!memcg_kmem_enabled()) | |
534 | return cachep; | |
535 | if (gfp & __GFP_NOFAIL) | |
536 | return cachep; | |
537 | if (in_interrupt() || (!current->mm) || (current->flags & PF_KTHREAD)) | |
538 | return cachep; | |
539 | if (unlikely(fatal_signal_pending(current))) | |
540 | return cachep; | |
541 | ||
542 | return __memcg_kmem_get_cache(cachep, gfp); | |
543 | } | |
7ae1e1d0 | 544 | #else |
749c5415 GC |
545 | #define for_each_memcg_cache_index(_idx) \ |
546 | for (; NULL; ) | |
547 | ||
b9ce5ef4 GC |
548 | static inline bool memcg_kmem_enabled(void) |
549 | { | |
550 | return false; | |
551 | } | |
552 | ||
7ae1e1d0 GC |
553 | static inline bool |
554 | memcg_kmem_newpage_charge(gfp_t gfp, struct mem_cgroup **memcg, int order) | |
555 | { | |
556 | return true; | |
557 | } | |
558 | ||
559 | static inline void memcg_kmem_uncharge_pages(struct page *page, int order) | |
560 | { | |
561 | } | |
562 | ||
563 | static inline void | |
564 | memcg_kmem_commit_charge(struct page *page, struct mem_cgroup *memcg, int order) | |
565 | { | |
566 | } | |
2633d7a0 GC |
567 | |
568 | static inline int memcg_cache_id(struct mem_cgroup *memcg) | |
569 | { | |
570 | return -1; | |
571 | } | |
572 | ||
d7f25f8a GC |
573 | static inline struct kmem_cache * |
574 | memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp) | |
575 | { | |
576 | return cachep; | |
577 | } | |
7ae1e1d0 | 578 | #endif /* CONFIG_MEMCG_KMEM */ |
8cdea7c0 BS |
579 | #endif /* _LINUX_MEMCONTROL_H */ |
580 |