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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 | 27 | struct mem_cgroup; |
8697d331 BS |
28 | struct page; |
29 | struct mm_struct; | |
2633d7a0 | 30 | struct kmem_cache; |
78fb7466 | 31 | |
68b4876d SZ |
32 | /* |
33 | * The corresponding mem_cgroup_stat_names is defined in mm/memcontrol.c, | |
34 | * These two lists should keep in accord with each other. | |
35 | */ | |
36 | enum mem_cgroup_stat_index { | |
37 | /* | |
38 | * For MEM_CONTAINER_TYPE_ALL, usage = pagecache + rss. | |
39 | */ | |
40 | MEM_CGROUP_STAT_CACHE, /* # of pages charged as cache */ | |
41 | MEM_CGROUP_STAT_RSS, /* # of pages charged as anon rss */ | |
42 | MEM_CGROUP_STAT_RSS_HUGE, /* # of pages charged as anon huge */ | |
43 | MEM_CGROUP_STAT_FILE_MAPPED, /* # of pages charged as file rss */ | |
3ea67d06 | 44 | MEM_CGROUP_STAT_WRITEBACK, /* # of pages under writeback */ |
68b4876d SZ |
45 | MEM_CGROUP_STAT_SWAP, /* # of pages, swapped out */ |
46 | MEM_CGROUP_STAT_NSTATS, | |
2a7106f2 GT |
47 | }; |
48 | ||
5660048c JW |
49 | struct mem_cgroup_reclaim_cookie { |
50 | struct zone *zone; | |
51 | int priority; | |
52 | unsigned int generation; | |
53 | }; | |
54 | ||
c255a458 | 55 | #ifdef CONFIG_MEMCG |
00501b53 JW |
56 | int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
57 | gfp_t gfp_mask, struct mem_cgroup **memcgp); | |
58 | void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg, | |
59 | bool lrucare); | |
60 | void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg); | |
0a31bc97 | 61 | void mem_cgroup_uncharge(struct page *page); |
747db954 | 62 | void mem_cgroup_uncharge_list(struct list_head *page_list); |
569b846d | 63 | |
0a31bc97 JW |
64 | void mem_cgroup_migrate(struct page *oldpage, struct page *newpage, |
65 | bool lrucare); | |
569b846d | 66 | |
0a31bc97 JW |
67 | struct lruvec *mem_cgroup_zone_lruvec(struct zone *, struct mem_cgroup *); |
68 | struct lruvec *mem_cgroup_page_lruvec(struct page *, struct zone *); | |
c9b0ed51 | 69 | |
2314b42d JW |
70 | bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, |
71 | struct mem_cgroup *root); | |
72 | bool task_in_mem_cgroup(struct task_struct *task, struct mem_cgroup *memcg); | |
3062fc67 | 73 | |
e42d9d5d | 74 | extern struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page); |
cf475ad2 BS |
75 | extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
76 | ||
e1aab161 | 77 | extern struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg); |
182446d0 | 78 | extern struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css); |
e1aab161 | 79 | |
2314b42d JW |
80 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
81 | struct mem_cgroup *memcg) | |
2e4d4091 | 82 | { |
587af308 | 83 | struct mem_cgroup *task_memcg; |
413918bb | 84 | bool match = false; |
c3ac9a8a | 85 | |
2e4d4091 | 86 | rcu_read_lock(); |
587af308 | 87 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
413918bb | 88 | if (task_memcg) |
2314b42d | 89 | match = mem_cgroup_is_descendant(task_memcg, memcg); |
2e4d4091 | 90 | rcu_read_unlock(); |
c3ac9a8a | 91 | return match; |
2e4d4091 | 92 | } |
8a9f3ccd | 93 | |
c0ff4b85 | 94 | extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *memcg); |
d324236b | 95 | |
694fbc0f AM |
96 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
97 | struct mem_cgroup *, | |
98 | struct mem_cgroup_reclaim_cookie *); | |
5660048c JW |
99 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); |
100 | ||
58ae83db KH |
101 | /* |
102 | * For memory reclaim. | |
103 | */ | |
c56d5c7d | 104 | int mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec); |
90cbc250 | 105 | bool mem_cgroup_lruvec_online(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 | ||
6de22619 | 142 | struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page); |
d7365e78 JW |
143 | void mem_cgroup_update_page_stat(struct mem_cgroup *memcg, |
144 | enum mem_cgroup_stat_index idx, int val); | |
6de22619 | 145 | void mem_cgroup_end_page_stat(struct mem_cgroup *memcg); |
d7365e78 JW |
146 | |
147 | static inline void mem_cgroup_inc_page_stat(struct mem_cgroup *memcg, | |
68b4876d | 148 | enum mem_cgroup_stat_index idx) |
2a7106f2 | 149 | { |
d7365e78 | 150 | mem_cgroup_update_page_stat(memcg, idx, 1); |
2a7106f2 GT |
151 | } |
152 | ||
d7365e78 | 153 | static inline void mem_cgroup_dec_page_stat(struct mem_cgroup *memcg, |
68b4876d | 154 | enum mem_cgroup_stat_index idx) |
2a7106f2 | 155 | { |
d7365e78 | 156 | mem_cgroup_update_page_stat(memcg, idx, -1); |
2a7106f2 GT |
157 | } |
158 | ||
0608f43d AM |
159 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
160 | gfp_t gfp_mask, | |
161 | unsigned long *total_scanned); | |
a63d83f4 | 162 | |
68ae564b DR |
163 | void __mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx); |
164 | static inline void mem_cgroup_count_vm_event(struct mm_struct *mm, | |
165 | enum vm_event_item idx) | |
166 | { | |
167 | if (mem_cgroup_disabled()) | |
168 | return; | |
169 | __mem_cgroup_count_vm_event(mm, idx); | |
170 | } | |
ca3e0214 | 171 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
e94c8a9c | 172 | void mem_cgroup_split_huge_fixup(struct page *head); |
ca3e0214 KH |
173 | #endif |
174 | ||
c255a458 | 175 | #else /* CONFIG_MEMCG */ |
7a81b88c KH |
176 | struct mem_cgroup; |
177 | ||
00501b53 JW |
178 | static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
179 | gfp_t gfp_mask, | |
180 | struct mem_cgroup **memcgp) | |
7a81b88c | 181 | { |
00501b53 | 182 | *memcgp = NULL; |
7a81b88c KH |
183 | return 0; |
184 | } | |
185 | ||
00501b53 JW |
186 | static inline void mem_cgroup_commit_charge(struct page *page, |
187 | struct mem_cgroup *memcg, | |
188 | bool lrucare) | |
7a81b88c KH |
189 | { |
190 | } | |
191 | ||
00501b53 JW |
192 | static inline void mem_cgroup_cancel_charge(struct page *page, |
193 | struct mem_cgroup *memcg) | |
7a81b88c KH |
194 | { |
195 | } | |
196 | ||
0a31bc97 | 197 | static inline void mem_cgroup_uncharge(struct page *page) |
569b846d KH |
198 | { |
199 | } | |
200 | ||
747db954 | 201 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
8a9f3ccd BS |
202 | { |
203 | } | |
204 | ||
0a31bc97 JW |
205 | static inline void mem_cgroup_migrate(struct page *oldpage, |
206 | struct page *newpage, | |
207 | bool lrucare) | |
69029cd5 KH |
208 | { |
209 | } | |
210 | ||
925b7673 JW |
211 | static inline struct lruvec *mem_cgroup_zone_lruvec(struct zone *zone, |
212 | struct mem_cgroup *memcg) | |
08e552c6 | 213 | { |
925b7673 | 214 | return &zone->lruvec; |
08e552c6 KH |
215 | } |
216 | ||
fa9add64 HD |
217 | static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, |
218 | struct zone *zone) | |
66e1707b | 219 | { |
925b7673 | 220 | return &zone->lruvec; |
66e1707b BS |
221 | } |
222 | ||
e42d9d5d WF |
223 | static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page) |
224 | { | |
225 | return NULL; | |
226 | } | |
227 | ||
587af308 | 228 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
c0ff4b85 | 229 | struct mem_cgroup *memcg) |
bed7161a | 230 | { |
587af308 | 231 | return true; |
bed7161a BS |
232 | } |
233 | ||
ffbdccf5 DR |
234 | static inline bool task_in_mem_cgroup(struct task_struct *task, |
235 | const struct mem_cgroup *memcg) | |
4c4a2214 | 236 | { |
ffbdccf5 | 237 | return true; |
4c4a2214 DR |
238 | } |
239 | ||
c0ff4b85 R |
240 | static inline struct cgroup_subsys_state |
241 | *mem_cgroup_css(struct mem_cgroup *memcg) | |
d324236b WF |
242 | { |
243 | return NULL; | |
244 | } | |
245 | ||
5660048c JW |
246 | static inline struct mem_cgroup * |
247 | mem_cgroup_iter(struct mem_cgroup *root, | |
248 | struct mem_cgroup *prev, | |
249 | struct mem_cgroup_reclaim_cookie *reclaim) | |
250 | { | |
251 | return NULL; | |
252 | } | |
253 | ||
254 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
255 | struct mem_cgroup *prev) | |
256 | { | |
257 | } | |
258 | ||
f8d66542 HT |
259 | static inline bool mem_cgroup_disabled(void) |
260 | { | |
261 | return true; | |
262 | } | |
a636b327 | 263 | |
14797e23 | 264 | static inline int |
c56d5c7d | 265 | mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec) |
14797e23 KM |
266 | { |
267 | return 1; | |
268 | } | |
269 | ||
90cbc250 VD |
270 | static inline bool mem_cgroup_lruvec_online(struct lruvec *lruvec) |
271 | { | |
272 | return true; | |
273 | } | |
274 | ||
a3d8e054 | 275 | static inline unsigned long |
4d7dcca2 | 276 | mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru) |
a3d8e054 KM |
277 | { |
278 | return 0; | |
279 | } | |
280 | ||
fa9add64 HD |
281 | static inline void |
282 | mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, | |
283 | int increment) | |
3e2f41f1 | 284 | { |
3e2f41f1 KM |
285 | } |
286 | ||
e222432b BS |
287 | static inline void |
288 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) | |
289 | { | |
290 | } | |
291 | ||
6de22619 | 292 | static inline struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page) |
89c06bd5 | 293 | { |
d7365e78 | 294 | return NULL; |
89c06bd5 KH |
295 | } |
296 | ||
6de22619 | 297 | static inline void mem_cgroup_end_page_stat(struct mem_cgroup *memcg) |
89c06bd5 KH |
298 | { |
299 | } | |
300 | ||
49426420 | 301 | static inline void mem_cgroup_oom_enable(void) |
519e5247 JW |
302 | { |
303 | } | |
304 | ||
49426420 | 305 | static inline void mem_cgroup_oom_disable(void) |
519e5247 JW |
306 | { |
307 | } | |
308 | ||
3812c8c8 JW |
309 | static inline bool task_in_memcg_oom(struct task_struct *p) |
310 | { | |
311 | return false; | |
312 | } | |
313 | ||
49426420 | 314 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
3812c8c8 JW |
315 | { |
316 | return false; | |
317 | } | |
318 | ||
d7365e78 | 319 | static inline void mem_cgroup_inc_page_stat(struct mem_cgroup *memcg, |
68b4876d | 320 | enum mem_cgroup_stat_index idx) |
2a7106f2 GT |
321 | { |
322 | } | |
323 | ||
d7365e78 | 324 | static inline void mem_cgroup_dec_page_stat(struct mem_cgroup *memcg, |
68b4876d | 325 | enum mem_cgroup_stat_index idx) |
d69b042f BS |
326 | { |
327 | } | |
328 | ||
4e416953 | 329 | static inline |
0608f43d AM |
330 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
331 | gfp_t gfp_mask, | |
332 | unsigned long *total_scanned) | |
4e416953 | 333 | { |
0608f43d | 334 | return 0; |
4e416953 BS |
335 | } |
336 | ||
e94c8a9c | 337 | static inline void mem_cgroup_split_huge_fixup(struct page *head) |
ca3e0214 KH |
338 | { |
339 | } | |
340 | ||
456f998e YH |
341 | static inline |
342 | void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx) | |
343 | { | |
344 | } | |
c255a458 | 345 | #endif /* CONFIG_MEMCG */ |
78fb7466 | 346 | |
e1aab161 GC |
347 | enum { |
348 | UNDER_LIMIT, | |
349 | SOFT_LIMIT, | |
350 | OVER_LIMIT, | |
351 | }; | |
352 | ||
353 | struct sock; | |
cd59085a | 354 | #if defined(CONFIG_INET) && defined(CONFIG_MEMCG_KMEM) |
e1aab161 GC |
355 | void sock_update_memcg(struct sock *sk); |
356 | void sock_release_memcg(struct sock *sk); | |
357 | #else | |
358 | static inline void sock_update_memcg(struct sock *sk) | |
359 | { | |
360 | } | |
361 | static inline void sock_release_memcg(struct sock *sk) | |
362 | { | |
363 | } | |
cd59085a | 364 | #endif /* CONFIG_INET && CONFIG_MEMCG_KMEM */ |
7ae1e1d0 GC |
365 | |
366 | #ifdef CONFIG_MEMCG_KMEM | |
a8964b9b | 367 | extern struct static_key memcg_kmem_enabled_key; |
749c5415 GC |
368 | |
369 | extern int memcg_limited_groups_array_size; | |
ebe945c2 GC |
370 | |
371 | /* | |
372 | * Helper macro to loop through all memcg-specific caches. Callers must still | |
373 | * check if the cache is valid (it is either valid or NULL). | |
374 | * the slab_mutex must be held when looping through those caches | |
375 | */ | |
749c5415 | 376 | #define for_each_memcg_cache_index(_idx) \ |
91c777d8 | 377 | for ((_idx) = 0; (_idx) < memcg_limited_groups_array_size; (_idx)++) |
749c5415 | 378 | |
7ae1e1d0 GC |
379 | static inline bool memcg_kmem_enabled(void) |
380 | { | |
a8964b9b | 381 | return static_key_false(&memcg_kmem_enabled_key); |
7ae1e1d0 GC |
382 | } |
383 | ||
384 | /* | |
385 | * In general, we'll do everything in our power to not incur in any overhead | |
386 | * for non-memcg users for the kmem functions. Not even a function call, if we | |
387 | * can avoid it. | |
388 | * | |
389 | * Therefore, we'll inline all those functions so that in the best case, we'll | |
390 | * see that kmemcg is off for everybody and proceed quickly. If it is on, | |
391 | * we'll still do most of the flag checking inline. We check a lot of | |
392 | * conditions, but because they are pretty simple, they are expected to be | |
393 | * fast. | |
394 | */ | |
395 | bool __memcg_kmem_newpage_charge(gfp_t gfp, struct mem_cgroup **memcg, | |
396 | int order); | |
397 | void __memcg_kmem_commit_charge(struct page *page, | |
398 | struct mem_cgroup *memcg, int order); | |
399 | void __memcg_kmem_uncharge_pages(struct page *page, int order); | |
400 | ||
2633d7a0 | 401 | int memcg_cache_id(struct mem_cgroup *memcg); |
5722d094 | 402 | |
55007d84 | 403 | void memcg_update_array_size(int num_groups); |
d7f25f8a | 404 | |
8135be5a VD |
405 | struct kmem_cache *__memcg_kmem_get_cache(struct kmem_cache *cachep); |
406 | void __memcg_kmem_put_cache(struct kmem_cache *cachep); | |
d7f25f8a | 407 | |
dbf22eb6 VD |
408 | int memcg_charge_kmem(struct mem_cgroup *memcg, gfp_t gfp, |
409 | unsigned long nr_pages); | |
410 | void memcg_uncharge_kmem(struct mem_cgroup *memcg, unsigned long nr_pages); | |
5dfb4175 | 411 | |
7ae1e1d0 GC |
412 | /** |
413 | * memcg_kmem_newpage_charge: verify if a new kmem allocation is allowed. | |
414 | * @gfp: the gfp allocation flags. | |
415 | * @memcg: a pointer to the memcg this was charged against. | |
416 | * @order: allocation order. | |
417 | * | |
418 | * returns true if the memcg where the current task belongs can hold this | |
419 | * allocation. | |
420 | * | |
421 | * We return true automatically if this allocation is not to be accounted to | |
422 | * any memcg. | |
423 | */ | |
424 | static inline bool | |
425 | memcg_kmem_newpage_charge(gfp_t gfp, struct mem_cgroup **memcg, int order) | |
426 | { | |
427 | if (!memcg_kmem_enabled()) | |
428 | return true; | |
429 | ||
430 | /* | |
431 | * __GFP_NOFAIL allocations will move on even if charging is not | |
432 | * possible. Therefore we don't even try, and have this allocation | |
3e32cb2e JW |
433 | * unaccounted. We could in theory charge it forcibly, but we hope |
434 | * those allocations are rare, and won't be worth the trouble. | |
7ae1e1d0 | 435 | */ |
52383431 | 436 | if (gfp & __GFP_NOFAIL) |
7ae1e1d0 GC |
437 | return true; |
438 | if (in_interrupt() || (!current->mm) || (current->flags & PF_KTHREAD)) | |
439 | return true; | |
440 | ||
441 | /* If the test is dying, just let it go. */ | |
442 | if (unlikely(fatal_signal_pending(current))) | |
443 | return true; | |
444 | ||
445 | return __memcg_kmem_newpage_charge(gfp, memcg, order); | |
446 | } | |
447 | ||
448 | /** | |
449 | * memcg_kmem_uncharge_pages: uncharge pages from memcg | |
450 | * @page: pointer to struct page being freed | |
451 | * @order: allocation order. | |
7ae1e1d0 GC |
452 | */ |
453 | static inline void | |
454 | memcg_kmem_uncharge_pages(struct page *page, int order) | |
455 | { | |
456 | if (memcg_kmem_enabled()) | |
457 | __memcg_kmem_uncharge_pages(page, order); | |
458 | } | |
459 | ||
460 | /** | |
461 | * memcg_kmem_commit_charge: embeds correct memcg in a page | |
462 | * @page: pointer to struct page recently allocated | |
463 | * @memcg: the memcg structure we charged against | |
464 | * @order: allocation order. | |
465 | * | |
466 | * Needs to be called after memcg_kmem_newpage_charge, regardless of success or | |
467 | * failure of the allocation. if @page is NULL, this function will revert the | |
1306a85a | 468 | * charges. Otherwise, it will commit @page to @memcg. |
7ae1e1d0 GC |
469 | */ |
470 | static inline void | |
471 | memcg_kmem_commit_charge(struct page *page, struct mem_cgroup *memcg, int order) | |
472 | { | |
473 | if (memcg_kmem_enabled() && memcg) | |
474 | __memcg_kmem_commit_charge(page, memcg, order); | |
475 | } | |
476 | ||
d7f25f8a GC |
477 | /** |
478 | * memcg_kmem_get_cache: selects the correct per-memcg cache for allocation | |
479 | * @cachep: the original global kmem cache | |
480 | * @gfp: allocation flags. | |
481 | * | |
5dfb4175 | 482 | * All memory allocated from a per-memcg cache is charged to the owner memcg. |
d7f25f8a GC |
483 | */ |
484 | static __always_inline struct kmem_cache * | |
485 | memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp) | |
486 | { | |
487 | if (!memcg_kmem_enabled()) | |
488 | return cachep; | |
489 | if (gfp & __GFP_NOFAIL) | |
490 | return cachep; | |
491 | if (in_interrupt() || (!current->mm) || (current->flags & PF_KTHREAD)) | |
492 | return cachep; | |
493 | if (unlikely(fatal_signal_pending(current))) | |
494 | return cachep; | |
495 | ||
056b7cce | 496 | return __memcg_kmem_get_cache(cachep); |
d7f25f8a | 497 | } |
8135be5a VD |
498 | |
499 | static __always_inline void memcg_kmem_put_cache(struct kmem_cache *cachep) | |
500 | { | |
501 | if (memcg_kmem_enabled()) | |
502 | __memcg_kmem_put_cache(cachep); | |
503 | } | |
7ae1e1d0 | 504 | #else |
749c5415 GC |
505 | #define for_each_memcg_cache_index(_idx) \ |
506 | for (; NULL; ) | |
507 | ||
b9ce5ef4 GC |
508 | static inline bool memcg_kmem_enabled(void) |
509 | { | |
510 | return false; | |
511 | } | |
512 | ||
7ae1e1d0 GC |
513 | static inline bool |
514 | memcg_kmem_newpage_charge(gfp_t gfp, struct mem_cgroup **memcg, int order) | |
515 | { | |
516 | return true; | |
517 | } | |
518 | ||
519 | static inline void memcg_kmem_uncharge_pages(struct page *page, int order) | |
520 | { | |
521 | } | |
522 | ||
523 | static inline void | |
524 | memcg_kmem_commit_charge(struct page *page, struct mem_cgroup *memcg, int order) | |
525 | { | |
526 | } | |
2633d7a0 GC |
527 | |
528 | static inline int memcg_cache_id(struct mem_cgroup *memcg) | |
529 | { | |
530 | return -1; | |
531 | } | |
532 | ||
d7f25f8a GC |
533 | static inline struct kmem_cache * |
534 | memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp) | |
535 | { | |
536 | return cachep; | |
537 | } | |
8135be5a VD |
538 | |
539 | static inline void memcg_kmem_put_cache(struct kmem_cache *cachep) | |
540 | { | |
541 | } | |
7ae1e1d0 | 542 | #endif /* CONFIG_MEMCG_KMEM */ |
8cdea7c0 BS |
543 | #endif /* _LINUX_MEMCONTROL_H */ |
544 |