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 | 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); |
889976db | 105 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
4d7dcca2 | 106 | unsigned long mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list); |
fa9add64 | 107 | void mem_cgroup_update_lru_size(struct lruvec *, enum lru_list, int); |
e222432b BS |
108 | extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, |
109 | struct task_struct *p); | |
58ae83db | 110 | |
49426420 | 111 | static inline void mem_cgroup_oom_enable(void) |
519e5247 | 112 | { |
49426420 JW |
113 | WARN_ON(current->memcg_oom.may_oom); |
114 | current->memcg_oom.may_oom = 1; | |
519e5247 JW |
115 | } |
116 | ||
49426420 | 117 | static inline void mem_cgroup_oom_disable(void) |
519e5247 | 118 | { |
49426420 JW |
119 | WARN_ON(!current->memcg_oom.may_oom); |
120 | current->memcg_oom.may_oom = 0; | |
519e5247 JW |
121 | } |
122 | ||
3812c8c8 JW |
123 | static inline bool task_in_memcg_oom(struct task_struct *p) |
124 | { | |
49426420 | 125 | return p->memcg_oom.memcg; |
3812c8c8 JW |
126 | } |
127 | ||
49426420 | 128 | bool mem_cgroup_oom_synchronize(bool wait); |
3812c8c8 | 129 | |
c255a458 | 130 | #ifdef CONFIG_MEMCG_SWAP |
c077719b KH |
131 | extern int do_swap_account; |
132 | #endif | |
f8d66542 HT |
133 | |
134 | static inline bool mem_cgroup_disabled(void) | |
135 | { | |
073219e9 | 136 | if (memory_cgrp_subsys.disabled) |
f8d66542 HT |
137 | return true; |
138 | return false; | |
139 | } | |
140 | ||
6de22619 | 141 | struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page); |
d7365e78 JW |
142 | void mem_cgroup_update_page_stat(struct mem_cgroup *memcg, |
143 | enum mem_cgroup_stat_index idx, int val); | |
6de22619 | 144 | void mem_cgroup_end_page_stat(struct mem_cgroup *memcg); |
d7365e78 JW |
145 | |
146 | static inline void mem_cgroup_inc_page_stat(struct mem_cgroup *memcg, | |
68b4876d | 147 | enum mem_cgroup_stat_index idx) |
2a7106f2 | 148 | { |
d7365e78 | 149 | mem_cgroup_update_page_stat(memcg, idx, 1); |
2a7106f2 GT |
150 | } |
151 | ||
d7365e78 | 152 | static inline void mem_cgroup_dec_page_stat(struct mem_cgroup *memcg, |
68b4876d | 153 | enum mem_cgroup_stat_index idx) |
2a7106f2 | 154 | { |
d7365e78 | 155 | mem_cgroup_update_page_stat(memcg, idx, -1); |
2a7106f2 GT |
156 | } |
157 | ||
0608f43d AM |
158 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
159 | gfp_t gfp_mask, | |
160 | unsigned long *total_scanned); | |
a63d83f4 | 161 | |
68ae564b DR |
162 | void __mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx); |
163 | static inline void mem_cgroup_count_vm_event(struct mm_struct *mm, | |
164 | enum vm_event_item idx) | |
165 | { | |
166 | if (mem_cgroup_disabled()) | |
167 | return; | |
168 | __mem_cgroup_count_vm_event(mm, idx); | |
169 | } | |
ca3e0214 | 170 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
e94c8a9c | 171 | void mem_cgroup_split_huge_fixup(struct page *head); |
ca3e0214 KH |
172 | #endif |
173 | ||
c255a458 | 174 | #else /* CONFIG_MEMCG */ |
7a81b88c KH |
175 | struct mem_cgroup; |
176 | ||
00501b53 JW |
177 | static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, |
178 | gfp_t gfp_mask, | |
179 | struct mem_cgroup **memcgp) | |
7a81b88c | 180 | { |
00501b53 | 181 | *memcgp = NULL; |
7a81b88c KH |
182 | return 0; |
183 | } | |
184 | ||
00501b53 JW |
185 | static inline void mem_cgroup_commit_charge(struct page *page, |
186 | struct mem_cgroup *memcg, | |
187 | bool lrucare) | |
7a81b88c KH |
188 | { |
189 | } | |
190 | ||
00501b53 JW |
191 | static inline void mem_cgroup_cancel_charge(struct page *page, |
192 | struct mem_cgroup *memcg) | |
7a81b88c KH |
193 | { |
194 | } | |
195 | ||
0a31bc97 | 196 | static inline void mem_cgroup_uncharge(struct page *page) |
569b846d KH |
197 | { |
198 | } | |
199 | ||
747db954 | 200 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
8a9f3ccd BS |
201 | { |
202 | } | |
203 | ||
0a31bc97 JW |
204 | static inline void mem_cgroup_migrate(struct page *oldpage, |
205 | struct page *newpage, | |
206 | bool lrucare) | |
69029cd5 KH |
207 | { |
208 | } | |
209 | ||
925b7673 JW |
210 | static inline struct lruvec *mem_cgroup_zone_lruvec(struct zone *zone, |
211 | struct mem_cgroup *memcg) | |
08e552c6 | 212 | { |
925b7673 | 213 | return &zone->lruvec; |
08e552c6 KH |
214 | } |
215 | ||
fa9add64 HD |
216 | static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, |
217 | struct zone *zone) | |
66e1707b | 218 | { |
925b7673 | 219 | return &zone->lruvec; |
66e1707b BS |
220 | } |
221 | ||
e42d9d5d WF |
222 | static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page) |
223 | { | |
224 | return NULL; | |
225 | } | |
226 | ||
587af308 | 227 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
c0ff4b85 | 228 | struct mem_cgroup *memcg) |
bed7161a | 229 | { |
587af308 | 230 | return true; |
bed7161a BS |
231 | } |
232 | ||
ffbdccf5 DR |
233 | static inline bool task_in_mem_cgroup(struct task_struct *task, |
234 | const struct mem_cgroup *memcg) | |
4c4a2214 | 235 | { |
ffbdccf5 | 236 | return true; |
4c4a2214 DR |
237 | } |
238 | ||
c0ff4b85 R |
239 | static inline struct cgroup_subsys_state |
240 | *mem_cgroup_css(struct mem_cgroup *memcg) | |
d324236b WF |
241 | { |
242 | return NULL; | |
243 | } | |
244 | ||
5660048c JW |
245 | static inline struct mem_cgroup * |
246 | mem_cgroup_iter(struct mem_cgroup *root, | |
247 | struct mem_cgroup *prev, | |
248 | struct mem_cgroup_reclaim_cookie *reclaim) | |
249 | { | |
250 | return NULL; | |
251 | } | |
252 | ||
253 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
254 | struct mem_cgroup *prev) | |
255 | { | |
256 | } | |
257 | ||
f8d66542 HT |
258 | static inline bool mem_cgroup_disabled(void) |
259 | { | |
260 | return true; | |
261 | } | |
a636b327 | 262 | |
14797e23 | 263 | static inline int |
c56d5c7d | 264 | mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec) |
14797e23 KM |
265 | { |
266 | return 1; | |
267 | } | |
268 | ||
a3d8e054 | 269 | static inline unsigned long |
4d7dcca2 | 270 | mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru) |
a3d8e054 KM |
271 | { |
272 | return 0; | |
273 | } | |
274 | ||
fa9add64 HD |
275 | static inline void |
276 | mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, | |
277 | int increment) | |
3e2f41f1 | 278 | { |
3e2f41f1 KM |
279 | } |
280 | ||
e222432b BS |
281 | static inline void |
282 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) | |
283 | { | |
284 | } | |
285 | ||
6de22619 | 286 | static inline struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page) |
89c06bd5 | 287 | { |
d7365e78 | 288 | return NULL; |
89c06bd5 KH |
289 | } |
290 | ||
6de22619 | 291 | static inline void mem_cgroup_end_page_stat(struct mem_cgroup *memcg) |
89c06bd5 KH |
292 | { |
293 | } | |
294 | ||
49426420 | 295 | static inline void mem_cgroup_oom_enable(void) |
519e5247 JW |
296 | { |
297 | } | |
298 | ||
49426420 | 299 | static inline void mem_cgroup_oom_disable(void) |
519e5247 JW |
300 | { |
301 | } | |
302 | ||
3812c8c8 JW |
303 | static inline bool task_in_memcg_oom(struct task_struct *p) |
304 | { | |
305 | return false; | |
306 | } | |
307 | ||
49426420 | 308 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
3812c8c8 JW |
309 | { |
310 | return false; | |
311 | } | |
312 | ||
d7365e78 | 313 | static inline void mem_cgroup_inc_page_stat(struct mem_cgroup *memcg, |
68b4876d | 314 | enum mem_cgroup_stat_index idx) |
2a7106f2 GT |
315 | { |
316 | } | |
317 | ||
d7365e78 | 318 | static inline void mem_cgroup_dec_page_stat(struct mem_cgroup *memcg, |
68b4876d | 319 | enum mem_cgroup_stat_index idx) |
d69b042f BS |
320 | { |
321 | } | |
322 | ||
4e416953 | 323 | static inline |
0608f43d AM |
324 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
325 | gfp_t gfp_mask, | |
326 | unsigned long *total_scanned) | |
4e416953 | 327 | { |
0608f43d | 328 | return 0; |
4e416953 BS |
329 | } |
330 | ||
e94c8a9c | 331 | static inline void mem_cgroup_split_huge_fixup(struct page *head) |
ca3e0214 KH |
332 | { |
333 | } | |
334 | ||
456f998e YH |
335 | static inline |
336 | void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx) | |
337 | { | |
338 | } | |
c255a458 | 339 | #endif /* CONFIG_MEMCG */ |
78fb7466 | 340 | |
e1aab161 GC |
341 | enum { |
342 | UNDER_LIMIT, | |
343 | SOFT_LIMIT, | |
344 | OVER_LIMIT, | |
345 | }; | |
346 | ||
347 | struct sock; | |
cd59085a | 348 | #if defined(CONFIG_INET) && defined(CONFIG_MEMCG_KMEM) |
e1aab161 GC |
349 | void sock_update_memcg(struct sock *sk); |
350 | void sock_release_memcg(struct sock *sk); | |
351 | #else | |
352 | static inline void sock_update_memcg(struct sock *sk) | |
353 | { | |
354 | } | |
355 | static inline void sock_release_memcg(struct sock *sk) | |
356 | { | |
357 | } | |
cd59085a | 358 | #endif /* CONFIG_INET && CONFIG_MEMCG_KMEM */ |
7ae1e1d0 GC |
359 | |
360 | #ifdef CONFIG_MEMCG_KMEM | |
a8964b9b | 361 | extern struct static_key memcg_kmem_enabled_key; |
749c5415 GC |
362 | |
363 | extern int memcg_limited_groups_array_size; | |
ebe945c2 GC |
364 | |
365 | /* | |
366 | * Helper macro to loop through all memcg-specific caches. Callers must still | |
367 | * check if the cache is valid (it is either valid or NULL). | |
368 | * the slab_mutex must be held when looping through those caches | |
369 | */ | |
749c5415 | 370 | #define for_each_memcg_cache_index(_idx) \ |
91c777d8 | 371 | for ((_idx) = 0; (_idx) < memcg_limited_groups_array_size; (_idx)++) |
749c5415 | 372 | |
7ae1e1d0 GC |
373 | static inline bool memcg_kmem_enabled(void) |
374 | { | |
a8964b9b | 375 | return static_key_false(&memcg_kmem_enabled_key); |
7ae1e1d0 GC |
376 | } |
377 | ||
378 | /* | |
379 | * In general, we'll do everything in our power to not incur in any overhead | |
380 | * for non-memcg users for the kmem functions. Not even a function call, if we | |
381 | * can avoid it. | |
382 | * | |
383 | * Therefore, we'll inline all those functions so that in the best case, we'll | |
384 | * see that kmemcg is off for everybody and proceed quickly. If it is on, | |
385 | * we'll still do most of the flag checking inline. We check a lot of | |
386 | * conditions, but because they are pretty simple, they are expected to be | |
387 | * fast. | |
388 | */ | |
389 | bool __memcg_kmem_newpage_charge(gfp_t gfp, struct mem_cgroup **memcg, | |
390 | int order); | |
391 | void __memcg_kmem_commit_charge(struct page *page, | |
392 | struct mem_cgroup *memcg, int order); | |
393 | void __memcg_kmem_uncharge_pages(struct page *page, int order); | |
394 | ||
2633d7a0 | 395 | int memcg_cache_id(struct mem_cgroup *memcg); |
5722d094 | 396 | |
55007d84 | 397 | void memcg_update_array_size(int num_groups); |
d7f25f8a | 398 | |
8135be5a VD |
399 | struct kmem_cache *__memcg_kmem_get_cache(struct kmem_cache *cachep); |
400 | void __memcg_kmem_put_cache(struct kmem_cache *cachep); | |
d7f25f8a | 401 | |
dbf22eb6 VD |
402 | int memcg_charge_kmem(struct mem_cgroup *memcg, gfp_t gfp, |
403 | unsigned long nr_pages); | |
404 | void memcg_uncharge_kmem(struct mem_cgroup *memcg, unsigned long nr_pages); | |
5dfb4175 | 405 | |
7ae1e1d0 GC |
406 | /** |
407 | * memcg_kmem_newpage_charge: verify if a new kmem allocation is allowed. | |
408 | * @gfp: the gfp allocation flags. | |
409 | * @memcg: a pointer to the memcg this was charged against. | |
410 | * @order: allocation order. | |
411 | * | |
412 | * returns true if the memcg where the current task belongs can hold this | |
413 | * allocation. | |
414 | * | |
415 | * We return true automatically if this allocation is not to be accounted to | |
416 | * any memcg. | |
417 | */ | |
418 | static inline bool | |
419 | memcg_kmem_newpage_charge(gfp_t gfp, struct mem_cgroup **memcg, int order) | |
420 | { | |
421 | if (!memcg_kmem_enabled()) | |
422 | return true; | |
423 | ||
424 | /* | |
425 | * __GFP_NOFAIL allocations will move on even if charging is not | |
426 | * possible. Therefore we don't even try, and have this allocation | |
3e32cb2e JW |
427 | * unaccounted. We could in theory charge it forcibly, but we hope |
428 | * those allocations are rare, and won't be worth the trouble. | |
7ae1e1d0 | 429 | */ |
52383431 | 430 | if (gfp & __GFP_NOFAIL) |
7ae1e1d0 GC |
431 | return true; |
432 | if (in_interrupt() || (!current->mm) || (current->flags & PF_KTHREAD)) | |
433 | return true; | |
434 | ||
435 | /* If the test is dying, just let it go. */ | |
436 | if (unlikely(fatal_signal_pending(current))) | |
437 | return true; | |
438 | ||
439 | return __memcg_kmem_newpage_charge(gfp, memcg, order); | |
440 | } | |
441 | ||
442 | /** | |
443 | * memcg_kmem_uncharge_pages: uncharge pages from memcg | |
444 | * @page: pointer to struct page being freed | |
445 | * @order: allocation order. | |
7ae1e1d0 GC |
446 | */ |
447 | static inline void | |
448 | memcg_kmem_uncharge_pages(struct page *page, int order) | |
449 | { | |
450 | if (memcg_kmem_enabled()) | |
451 | __memcg_kmem_uncharge_pages(page, order); | |
452 | } | |
453 | ||
454 | /** | |
455 | * memcg_kmem_commit_charge: embeds correct memcg in a page | |
456 | * @page: pointer to struct page recently allocated | |
457 | * @memcg: the memcg structure we charged against | |
458 | * @order: allocation order. | |
459 | * | |
460 | * Needs to be called after memcg_kmem_newpage_charge, regardless of success or | |
461 | * failure of the allocation. if @page is NULL, this function will revert the | |
1306a85a | 462 | * charges. Otherwise, it will commit @page to @memcg. |
7ae1e1d0 GC |
463 | */ |
464 | static inline void | |
465 | memcg_kmem_commit_charge(struct page *page, struct mem_cgroup *memcg, int order) | |
466 | { | |
467 | if (memcg_kmem_enabled() && memcg) | |
468 | __memcg_kmem_commit_charge(page, memcg, order); | |
469 | } | |
470 | ||
d7f25f8a GC |
471 | /** |
472 | * memcg_kmem_get_cache: selects the correct per-memcg cache for allocation | |
473 | * @cachep: the original global kmem cache | |
474 | * @gfp: allocation flags. | |
475 | * | |
5dfb4175 | 476 | * All memory allocated from a per-memcg cache is charged to the owner memcg. |
d7f25f8a GC |
477 | */ |
478 | static __always_inline struct kmem_cache * | |
479 | memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp) | |
480 | { | |
481 | if (!memcg_kmem_enabled()) | |
482 | return cachep; | |
483 | if (gfp & __GFP_NOFAIL) | |
484 | return cachep; | |
485 | if (in_interrupt() || (!current->mm) || (current->flags & PF_KTHREAD)) | |
486 | return cachep; | |
487 | if (unlikely(fatal_signal_pending(current))) | |
488 | return cachep; | |
489 | ||
056b7cce | 490 | return __memcg_kmem_get_cache(cachep); |
d7f25f8a | 491 | } |
8135be5a VD |
492 | |
493 | static __always_inline void memcg_kmem_put_cache(struct kmem_cache *cachep) | |
494 | { | |
495 | if (memcg_kmem_enabled()) | |
496 | __memcg_kmem_put_cache(cachep); | |
497 | } | |
7ae1e1d0 | 498 | #else |
749c5415 GC |
499 | #define for_each_memcg_cache_index(_idx) \ |
500 | for (; NULL; ) | |
501 | ||
b9ce5ef4 GC |
502 | static inline bool memcg_kmem_enabled(void) |
503 | { | |
504 | return false; | |
505 | } | |
506 | ||
7ae1e1d0 GC |
507 | static inline bool |
508 | memcg_kmem_newpage_charge(gfp_t gfp, struct mem_cgroup **memcg, int order) | |
509 | { | |
510 | return true; | |
511 | } | |
512 | ||
513 | static inline void memcg_kmem_uncharge_pages(struct page *page, int order) | |
514 | { | |
515 | } | |
516 | ||
517 | static inline void | |
518 | memcg_kmem_commit_charge(struct page *page, struct mem_cgroup *memcg, int order) | |
519 | { | |
520 | } | |
2633d7a0 GC |
521 | |
522 | static inline int memcg_cache_id(struct mem_cgroup *memcg) | |
523 | { | |
524 | return -1; | |
525 | } | |
526 | ||
d7f25f8a GC |
527 | static inline struct kmem_cache * |
528 | memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp) | |
529 | { | |
530 | return cachep; | |
531 | } | |
8135be5a VD |
532 | |
533 | static inline void memcg_kmem_put_cache(struct kmem_cache *cachep) | |
534 | { | |
535 | } | |
7ae1e1d0 | 536 | #endif /* CONFIG_MEMCG_KMEM */ |
8cdea7c0 BS |
537 | #endif /* _LINUX_MEMCONTROL_H */ |
538 |