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c942fddf | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
8cdea7c0 BS |
2 | /* memcontrol.h - Memory Controller |
3 | * | |
4 | * Copyright IBM Corporation, 2007 | |
5 | * Author Balbir Singh <balbir@linux.vnet.ibm.com> | |
6 | * | |
78fb7466 PE |
7 | * Copyright 2007 OpenVZ SWsoft Inc |
8 | * Author: Pavel Emelianov <xemul@openvz.org> | |
8cdea7c0 BS |
9 | */ |
10 | ||
11 | #ifndef _LINUX_MEMCONTROL_H | |
12 | #define _LINUX_MEMCONTROL_H | |
f8d66542 | 13 | #include <linux/cgroup.h> |
456f998e | 14 | #include <linux/vm_event_item.h> |
7ae1e1d0 | 15 | #include <linux/hardirq.h> |
a8964b9b | 16 | #include <linux/jump_label.h> |
33398cf2 MH |
17 | #include <linux/page_counter.h> |
18 | #include <linux/vmpressure.h> | |
19 | #include <linux/eventfd.h> | |
00f3ca2c JW |
20 | #include <linux/mm.h> |
21 | #include <linux/vmstat.h> | |
33398cf2 | 22 | #include <linux/writeback.h> |
fdf1cdb9 | 23 | #include <linux/page-flags.h> |
456f998e | 24 | |
78fb7466 | 25 | struct mem_cgroup; |
bf4f0599 | 26 | struct obj_cgroup; |
8697d331 BS |
27 | struct page; |
28 | struct mm_struct; | |
2633d7a0 | 29 | struct kmem_cache; |
78fb7466 | 30 | |
71cd3113 JW |
31 | /* Cgroup-specific page state, on top of universal node page state */ |
32 | enum memcg_stat_item { | |
468c3982 | 33 | MEMCG_SWAP = NR_VM_NODE_STAT_ITEMS, |
71cd3113 | 34 | MEMCG_SOCK, |
772616b0 | 35 | MEMCG_PERCPU_B, |
b2807f07 | 36 | MEMCG_NR_STAT, |
2a7106f2 GT |
37 | }; |
38 | ||
e27be240 JW |
39 | enum memcg_memory_event { |
40 | MEMCG_LOW, | |
71cd3113 JW |
41 | MEMCG_HIGH, |
42 | MEMCG_MAX, | |
43 | MEMCG_OOM, | |
fe6bdfc8 | 44 | MEMCG_OOM_KILL, |
4b82ab4f | 45 | MEMCG_SWAP_HIGH, |
f3a53a3a TH |
46 | MEMCG_SWAP_MAX, |
47 | MEMCG_SWAP_FAIL, | |
e27be240 | 48 | MEMCG_NR_MEMORY_EVENTS, |
71cd3113 JW |
49 | }; |
50 | ||
5660048c | 51 | struct mem_cgroup_reclaim_cookie { |
ef8f2327 | 52 | pg_data_t *pgdat; |
5660048c JW |
53 | unsigned int generation; |
54 | }; | |
55 | ||
71cd3113 JW |
56 | #ifdef CONFIG_MEMCG |
57 | ||
58 | #define MEM_CGROUP_ID_SHIFT 16 | |
59 | #define MEM_CGROUP_ID_MAX USHRT_MAX | |
60 | ||
61 | struct mem_cgroup_id { | |
62 | int id; | |
1c2d479a | 63 | refcount_t ref; |
71cd3113 JW |
64 | }; |
65 | ||
33398cf2 MH |
66 | /* |
67 | * Per memcg event counter is incremented at every pagein/pageout. With THP, | |
0845f831 RD |
68 | * it will be incremented by the number of pages. This counter is used |
69 | * to trigger some periodic events. This is straightforward and better | |
33398cf2 MH |
70 | * than using jiffies etc. to handle periodic memcg event. |
71 | */ | |
72 | enum mem_cgroup_events_target { | |
73 | MEM_CGROUP_TARGET_THRESH, | |
74 | MEM_CGROUP_TARGET_SOFTLIMIT, | |
33398cf2 MH |
75 | MEM_CGROUP_NTARGETS, |
76 | }; | |
77 | ||
871789d4 CD |
78 | struct memcg_vmstats_percpu { |
79 | long stat[MEMCG_NR_STAT]; | |
e27be240 | 80 | unsigned long events[NR_VM_EVENT_ITEMS]; |
33398cf2 MH |
81 | unsigned long nr_page_events; |
82 | unsigned long targets[MEM_CGROUP_NTARGETS]; | |
83 | }; | |
84 | ||
85 | struct mem_cgroup_reclaim_iter { | |
86 | struct mem_cgroup *position; | |
87 | /* scan generation, increased every round-trip */ | |
88 | unsigned int generation; | |
89 | }; | |
90 | ||
00f3ca2c JW |
91 | struct lruvec_stat { |
92 | long count[NR_VM_NODE_STAT_ITEMS]; | |
93 | }; | |
94 | ||
0a4465d3 KT |
95 | /* |
96 | * Bitmap of shrinker::id corresponding to memcg-aware shrinkers, | |
97 | * which have elements charged to this memcg. | |
98 | */ | |
99 | struct memcg_shrinker_map { | |
100 | struct rcu_head rcu; | |
307ed94c | 101 | unsigned long map[]; |
0a4465d3 KT |
102 | }; |
103 | ||
33398cf2 | 104 | /* |
242c37b4 | 105 | * per-node information in memory controller. |
33398cf2 | 106 | */ |
ef8f2327 | 107 | struct mem_cgroup_per_node { |
33398cf2 | 108 | struct lruvec lruvec; |
a983b5eb | 109 | |
815744d7 JW |
110 | /* Legacy local VM stats */ |
111 | struct lruvec_stat __percpu *lruvec_stat_local; | |
112 | ||
113 | /* Subtree VM stats (batched updates) */ | |
a983b5eb JW |
114 | struct lruvec_stat __percpu *lruvec_stat_cpu; |
115 | atomic_long_t lruvec_stat[NR_VM_NODE_STAT_ITEMS]; | |
116 | ||
b4536f0c | 117 | unsigned long lru_zone_size[MAX_NR_ZONES][NR_LRU_LISTS]; |
33398cf2 | 118 | |
9da83f3f | 119 | struct mem_cgroup_reclaim_iter iter; |
33398cf2 | 120 | |
0a4465d3 | 121 | struct memcg_shrinker_map __rcu *shrinker_map; |
0a432dcb | 122 | |
33398cf2 MH |
123 | struct rb_node tree_node; /* RB tree node */ |
124 | unsigned long usage_in_excess;/* Set to the value by which */ | |
125 | /* the soft limit is exceeded*/ | |
126 | bool on_tree; | |
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 */ | |
307ed94c | 143 | struct mem_cgroup_threshold entries[]; |
33398cf2 MH |
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 | ||
e81bf979 AL |
163 | #if defined(CONFIG_SMP) |
164 | struct memcg_padding { | |
165 | char x[0]; | |
166 | } ____cacheline_internodealigned_in_smp; | |
167 | #define MEMCG_PADDING(name) struct memcg_padding name; | |
168 | #else | |
169 | #define MEMCG_PADDING(name) | |
170 | #endif | |
171 | ||
97b27821 TH |
172 | /* |
173 | * Remember four most recent foreign writebacks with dirty pages in this | |
174 | * cgroup. Inode sharing is expected to be uncommon and, even if we miss | |
175 | * one in a given round, we're likely to catch it later if it keeps | |
176 | * foreign-dirtying, so a fairly low count should be enough. | |
177 | * | |
178 | * See mem_cgroup_track_foreign_dirty_slowpath() for details. | |
179 | */ | |
180 | #define MEMCG_CGWB_FRN_CNT 4 | |
181 | ||
182 | struct memcg_cgwb_frn { | |
183 | u64 bdi_id; /* bdi->id of the foreign inode */ | |
184 | int memcg_id; /* memcg->css.id of foreign inode */ | |
185 | u64 at; /* jiffies_64 at the time of dirtying */ | |
186 | struct wb_completion done; /* tracks in-flight foreign writebacks */ | |
187 | }; | |
188 | ||
bf4f0599 RG |
189 | /* |
190 | * Bucket for arbitrarily byte-sized objects charged to a memory | |
191 | * cgroup. The bucket can be reparented in one piece when the cgroup | |
192 | * is destroyed, without having to round up the individual references | |
193 | * of all live memory objects in the wild. | |
194 | */ | |
195 | struct obj_cgroup { | |
196 | struct percpu_ref refcnt; | |
197 | struct mem_cgroup *memcg; | |
198 | atomic_t nr_charged_bytes; | |
199 | union { | |
200 | struct list_head list; | |
201 | struct rcu_head rcu; | |
202 | }; | |
203 | }; | |
204 | ||
33398cf2 MH |
205 | /* |
206 | * The memory controller data structure. The memory controller controls both | |
207 | * page cache and RSS per cgroup. We would eventually like to provide | |
208 | * statistics based on the statistics developed by Rik Van Riel for clock-pro, | |
209 | * to help the administrator determine what knobs to tune. | |
210 | */ | |
211 | struct mem_cgroup { | |
212 | struct cgroup_subsys_state css; | |
213 | ||
73f576c0 JW |
214 | /* Private memcg ID. Used to ID objects that outlive the cgroup */ |
215 | struct mem_cgroup_id id; | |
216 | ||
33398cf2 | 217 | /* Accounted resources */ |
bd0b230f WL |
218 | struct page_counter memory; /* Both v1 & v2 */ |
219 | ||
220 | union { | |
221 | struct page_counter swap; /* v2 only */ | |
222 | struct page_counter memsw; /* v1 only */ | |
223 | }; | |
0db15298 JW |
224 | |
225 | /* Legacy consumer-oriented counters */ | |
bd0b230f WL |
226 | struct page_counter kmem; /* v1 only */ |
227 | struct page_counter tcpmem; /* v1 only */ | |
33398cf2 | 228 | |
f7e1cb6e JW |
229 | /* Range enforcement for interrupt charges */ |
230 | struct work_struct high_work; | |
231 | ||
33398cf2 MH |
232 | unsigned long soft_limit; |
233 | ||
234 | /* vmpressure notifications */ | |
235 | struct vmpressure vmpressure; | |
236 | ||
33398cf2 MH |
237 | /* |
238 | * Should the accounting and control be hierarchical, per subtree? | |
239 | */ | |
240 | bool use_hierarchy; | |
241 | ||
3d8b38eb RG |
242 | /* |
243 | * Should the OOM killer kill all belonging tasks, had it kill one? | |
244 | */ | |
245 | bool oom_group; | |
246 | ||
33398cf2 MH |
247 | /* protected by memcg_oom_lock */ |
248 | bool oom_lock; | |
249 | int under_oom; | |
250 | ||
251 | int swappiness; | |
252 | /* OOM-Killer disable */ | |
253 | int oom_kill_disable; | |
254 | ||
1e577f97 | 255 | /* memory.events and memory.events.local */ |
472912a2 | 256 | struct cgroup_file events_file; |
1e577f97 | 257 | struct cgroup_file events_local_file; |
472912a2 | 258 | |
f3a53a3a TH |
259 | /* handle for "memory.swap.events" */ |
260 | struct cgroup_file swap_events_file; | |
261 | ||
33398cf2 MH |
262 | /* protect arrays of thresholds */ |
263 | struct mutex thresholds_lock; | |
264 | ||
265 | /* thresholds for memory usage. RCU-protected */ | |
266 | struct mem_cgroup_thresholds thresholds; | |
267 | ||
268 | /* thresholds for mem+swap usage. RCU-protected */ | |
269 | struct mem_cgroup_thresholds memsw_thresholds; | |
270 | ||
271 | /* For oom notifier event fd */ | |
272 | struct list_head oom_notify; | |
273 | ||
274 | /* | |
275 | * Should we move charges of a task when a task is moved into this | |
276 | * mem_cgroup ? And what type of charges should we move ? | |
277 | */ | |
278 | unsigned long move_charge_at_immigrate; | |
e81bf979 AL |
279 | /* taken only while moving_account > 0 */ |
280 | spinlock_t move_lock; | |
281 | unsigned long move_lock_flags; | |
282 | ||
283 | MEMCG_PADDING(_pad1_); | |
284 | ||
33398cf2 MH |
285 | /* |
286 | * set > 0 if pages under this cgroup are moving to other cgroup. | |
287 | */ | |
288 | atomic_t moving_account; | |
33398cf2 | 289 | struct task_struct *move_lock_task; |
a983b5eb | 290 | |
815744d7 JW |
291 | /* Legacy local VM stats and events */ |
292 | struct memcg_vmstats_percpu __percpu *vmstats_local; | |
293 | ||
294 | /* Subtree VM stats and events (batched updates) */ | |
871789d4 | 295 | struct memcg_vmstats_percpu __percpu *vmstats_percpu; |
e81bf979 AL |
296 | |
297 | MEMCG_PADDING(_pad2_); | |
298 | ||
871789d4 CD |
299 | atomic_long_t vmstats[MEMCG_NR_STAT]; |
300 | atomic_long_t vmevents[NR_VM_EVENT_ITEMS]; | |
42a30035 | 301 | |
815744d7 | 302 | /* memory.events */ |
42a30035 | 303 | atomic_long_t memory_events[MEMCG_NR_MEMORY_EVENTS]; |
1e577f97 | 304 | atomic_long_t memory_events_local[MEMCG_NR_MEMORY_EVENTS]; |
33398cf2 | 305 | |
d886f4e4 JW |
306 | unsigned long socket_pressure; |
307 | ||
308 | /* Legacy tcp memory accounting */ | |
0db15298 JW |
309 | bool tcpmem_active; |
310 | int tcpmem_pressure; | |
d886f4e4 | 311 | |
84c07d11 | 312 | #ifdef CONFIG_MEMCG_KMEM |
33398cf2 MH |
313 | /* Index in the kmem_cache->memcg_params.memcg_caches array */ |
314 | int kmemcg_id; | |
567e9ab2 | 315 | enum memcg_kmem_state kmem_state; |
bf4f0599 RG |
316 | struct obj_cgroup __rcu *objcg; |
317 | struct list_head objcg_list; /* list of inherited objcgs */ | |
33398cf2 MH |
318 | #endif |
319 | ||
33398cf2 MH |
320 | #ifdef CONFIG_CGROUP_WRITEBACK |
321 | struct list_head cgwb_list; | |
322 | struct wb_domain cgwb_domain; | |
97b27821 | 323 | struct memcg_cgwb_frn cgwb_frn[MEMCG_CGWB_FRN_CNT]; |
33398cf2 MH |
324 | #endif |
325 | ||
326 | /* List of events which userspace want to receive */ | |
327 | struct list_head event_list; | |
328 | spinlock_t event_list_lock; | |
329 | ||
87eaceb3 YS |
330 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
331 | struct deferred_split deferred_split_queue; | |
332 | #endif | |
333 | ||
33398cf2 MH |
334 | struct mem_cgroup_per_node *nodeinfo[0]; |
335 | /* WARNING: nodeinfo must be the last member here */ | |
336 | }; | |
7d828602 | 337 | |
a983b5eb JW |
338 | /* |
339 | * size of first charge trial. "32" comes from vmscan.c's magic value. | |
340 | * TODO: maybe necessary to use big numbers in big irons. | |
341 | */ | |
342 | #define MEMCG_CHARGE_BATCH 32U | |
343 | ||
7d828602 | 344 | extern struct mem_cgroup *root_mem_cgroup; |
56161634 | 345 | |
bcfe06bf RG |
346 | /* |
347 | * page_memcg - get the memory cgroup associated with a page | |
348 | * @page: a pointer to the page struct | |
349 | * | |
350 | * Returns a pointer to the memory cgroup associated with the page, | |
351 | * or NULL. This function assumes that the page is known to have a | |
352 | * proper memory cgroup pointer. It's not safe to call this function | |
353 | * against some type of pages, e.g. slab pages or ex-slab pages. | |
354 | * | |
355 | * Any of the following ensures page and memcg binding stability: | |
356 | * - the page lock | |
357 | * - LRU isolation | |
358 | * - lock_page_memcg() | |
359 | * - exclusive reference | |
360 | */ | |
361 | static inline struct mem_cgroup *page_memcg(struct page *page) | |
362 | { | |
363 | VM_BUG_ON_PAGE(PageSlab(page), page); | |
364 | return (struct mem_cgroup *)page->memcg_data; | |
365 | } | |
366 | ||
367 | /* | |
368 | * page_memcg_rcu - locklessly get the memory cgroup associated with a page | |
369 | * @page: a pointer to the page struct | |
370 | * | |
371 | * Returns a pointer to the memory cgroup associated with the page, | |
372 | * or NULL. This function assumes that the page is known to have a | |
373 | * proper memory cgroup pointer. It's not safe to call this function | |
374 | * against some type of pages, e.g. slab pages or ex-slab pages. | |
375 | */ | |
376 | static inline struct mem_cgroup *page_memcg_rcu(struct page *page) | |
377 | { | |
378 | VM_BUG_ON_PAGE(PageSlab(page), page); | |
379 | WARN_ON_ONCE(!rcu_read_lock_held()); | |
380 | ||
381 | return (struct mem_cgroup *)READ_ONCE(page->memcg_data); | |
382 | } | |
383 | ||
384 | /* | |
385 | * page_memcg_check - get the memory cgroup associated with a page | |
386 | * @page: a pointer to the page struct | |
387 | * | |
388 | * Returns a pointer to the memory cgroup associated with the page, | |
389 | * or NULL. This function unlike page_memcg() can take any page | |
390 | * as an argument. It has to be used in cases when it's not known if a page | |
391 | * has an associated memory cgroup pointer or an object cgroups vector. | |
392 | * | |
393 | * Any of the following ensures page and memcg binding stability: | |
394 | * - the page lock | |
395 | * - LRU isolation | |
396 | * - lock_page_memcg() | |
397 | * - exclusive reference | |
398 | */ | |
399 | static inline struct mem_cgroup *page_memcg_check(struct page *page) | |
400 | { | |
401 | /* | |
402 | * Because page->memcg_data might be changed asynchronously | |
403 | * for slab pages, READ_ONCE() should be used here. | |
404 | */ | |
405 | unsigned long memcg_data = READ_ONCE(page->memcg_data); | |
406 | ||
407 | /* | |
408 | * The lowest bit set means that memcg isn't a valid | |
409 | * memcg pointer, but a obj_cgroups pointer. | |
410 | * In this case the page is shared and doesn't belong | |
411 | * to any specific memory cgroup. | |
412 | */ | |
413 | if (memcg_data & 0x1UL) | |
414 | return NULL; | |
415 | ||
416 | return (struct mem_cgroup *)memcg_data; | |
417 | } | |
418 | ||
270c6a71 RG |
419 | #ifdef CONFIG_MEMCG_KMEM |
420 | /* | |
421 | * page_objcgs - get the object cgroups vector associated with a page | |
422 | * @page: a pointer to the page struct | |
423 | * | |
424 | * Returns a pointer to the object cgroups vector associated with the page, | |
425 | * or NULL. This function assumes that the page is known to have an | |
426 | * associated object cgroups vector. It's not safe to call this function | |
427 | * against pages, which might have an associated memory cgroup: e.g. | |
428 | * kernel stack pages. | |
429 | */ | |
430 | static inline struct obj_cgroup **page_objcgs(struct page *page) | |
431 | { | |
432 | return (struct obj_cgroup **)(READ_ONCE(page->memcg_data) & ~0x1UL); | |
433 | } | |
434 | ||
435 | /* | |
436 | * page_objcgs_check - get the object cgroups vector associated with a page | |
437 | * @page: a pointer to the page struct | |
438 | * | |
439 | * Returns a pointer to the object cgroups vector associated with the page, | |
440 | * or NULL. This function is safe to use if the page can be directly associated | |
441 | * with a memory cgroup. | |
442 | */ | |
443 | static inline struct obj_cgroup **page_objcgs_check(struct page *page) | |
444 | { | |
445 | unsigned long memcg_data = READ_ONCE(page->memcg_data); | |
446 | ||
447 | if (memcg_data && (memcg_data & 0x1UL)) | |
448 | return (struct obj_cgroup **)(memcg_data & ~0x1UL); | |
449 | ||
450 | return NULL; | |
451 | } | |
452 | ||
453 | /* | |
454 | * set_page_objcgs - associate a page with a object cgroups vector | |
455 | * @page: a pointer to the page struct | |
456 | * @objcgs: a pointer to the object cgroups vector | |
457 | * | |
458 | * Atomically associates a page with a vector of object cgroups. | |
459 | */ | |
460 | static inline bool set_page_objcgs(struct page *page, | |
461 | struct obj_cgroup **objcgs) | |
462 | { | |
463 | return !cmpxchg(&page->memcg_data, 0, (unsigned long)objcgs | 0x1UL); | |
464 | } | |
465 | #else | |
466 | static inline struct obj_cgroup **page_objcgs(struct page *page) | |
467 | { | |
468 | return NULL; | |
469 | } | |
470 | ||
471 | static inline struct obj_cgroup **page_objcgs_check(struct page *page) | |
472 | { | |
473 | return NULL; | |
474 | } | |
475 | ||
476 | static inline bool set_page_objcgs(struct page *page, | |
477 | struct obj_cgroup **objcgs) | |
478 | { | |
479 | return true; | |
480 | } | |
481 | #endif | |
482 | ||
772616b0 RG |
483 | static __always_inline bool memcg_stat_item_in_bytes(int idx) |
484 | { | |
485 | if (idx == MEMCG_PERCPU_B) | |
486 | return true; | |
487 | return vmstat_item_in_bytes(idx); | |
488 | } | |
489 | ||
dfd2f10c KT |
490 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
491 | { | |
492 | return (memcg == root_mem_cgroup); | |
493 | } | |
494 | ||
23047a96 JW |
495 | static inline bool mem_cgroup_disabled(void) |
496 | { | |
497 | return !cgroup_subsys_enabled(memory_cgrp_subsys); | |
498 | } | |
499 | ||
22f7496f YS |
500 | static inline unsigned long mem_cgroup_protection(struct mem_cgroup *root, |
501 | struct mem_cgroup *memcg, | |
1bc63fb1 | 502 | bool in_low_reclaim) |
9783aa99 | 503 | { |
1bc63fb1 CD |
504 | if (mem_cgroup_disabled()) |
505 | return 0; | |
506 | ||
22f7496f YS |
507 | /* |
508 | * There is no reclaim protection applied to a targeted reclaim. | |
509 | * We are special casing this specific case here because | |
510 | * mem_cgroup_protected calculation is not robust enough to keep | |
511 | * the protection invariant for calculated effective values for | |
512 | * parallel reclaimers with different reclaim target. This is | |
513 | * especially a problem for tail memcgs (as they have pages on LRU) | |
514 | * which would want to have effective values 0 for targeted reclaim | |
515 | * but a different value for external reclaim. | |
516 | * | |
517 | * Example | |
518 | * Let's have global and A's reclaim in parallel: | |
519 | * | | |
520 | * A (low=2G, usage = 3G, max = 3G, children_low_usage = 1.5G) | |
521 | * |\ | |
522 | * | C (low = 1G, usage = 2.5G) | |
523 | * B (low = 1G, usage = 0.5G) | |
524 | * | |
525 | * For the global reclaim | |
526 | * A.elow = A.low | |
527 | * B.elow = min(B.usage, B.low) because children_low_usage <= A.elow | |
528 | * C.elow = min(C.usage, C.low) | |
529 | * | |
530 | * With the effective values resetting we have A reclaim | |
531 | * A.elow = 0 | |
532 | * B.elow = B.low | |
533 | * C.elow = C.low | |
534 | * | |
535 | * If the global reclaim races with A's reclaim then | |
536 | * B.elow = C.elow = 0 because children_low_usage > A.elow) | |
537 | * is possible and reclaiming B would be violating the protection. | |
538 | * | |
539 | */ | |
540 | if (root == memcg) | |
541 | return 0; | |
542 | ||
1bc63fb1 CD |
543 | if (in_low_reclaim) |
544 | return READ_ONCE(memcg->memory.emin); | |
9783aa99 | 545 | |
1bc63fb1 CD |
546 | return max(READ_ONCE(memcg->memory.emin), |
547 | READ_ONCE(memcg->memory.elow)); | |
9783aa99 CD |
548 | } |
549 | ||
45c7f7e1 CD |
550 | void mem_cgroup_calculate_protection(struct mem_cgroup *root, |
551 | struct mem_cgroup *memcg); | |
552 | ||
553 | static inline bool mem_cgroup_supports_protection(struct mem_cgroup *memcg) | |
554 | { | |
555 | /* | |
556 | * The root memcg doesn't account charges, and doesn't support | |
557 | * protection. | |
558 | */ | |
559 | return !mem_cgroup_disabled() && !mem_cgroup_is_root(memcg); | |
560 | ||
561 | } | |
562 | ||
563 | static inline bool mem_cgroup_below_low(struct mem_cgroup *memcg) | |
564 | { | |
565 | if (!mem_cgroup_supports_protection(memcg)) | |
566 | return false; | |
567 | ||
568 | return READ_ONCE(memcg->memory.elow) >= | |
569 | page_counter_read(&memcg->memory); | |
570 | } | |
571 | ||
572 | static inline bool mem_cgroup_below_min(struct mem_cgroup *memcg) | |
573 | { | |
574 | if (!mem_cgroup_supports_protection(memcg)) | |
575 | return false; | |
576 | ||
577 | return READ_ONCE(memcg->memory.emin) >= | |
578 | page_counter_read(&memcg->memory); | |
579 | } | |
241994ed | 580 | |
d9eb1ea2 | 581 | int mem_cgroup_charge(struct page *page, struct mm_struct *mm, gfp_t gfp_mask); |
3fea5a49 | 582 | |
0a31bc97 | 583 | void mem_cgroup_uncharge(struct page *page); |
747db954 | 584 | void mem_cgroup_uncharge_list(struct list_head *page_list); |
569b846d | 585 | |
6a93ca8f | 586 | void mem_cgroup_migrate(struct page *oldpage, struct page *newpage); |
569b846d | 587 | |
ef8f2327 MG |
588 | static struct mem_cgroup_per_node * |
589 | mem_cgroup_nodeinfo(struct mem_cgroup *memcg, int nid) | |
55779ec7 | 590 | { |
ef8f2327 | 591 | return memcg->nodeinfo[nid]; |
55779ec7 JW |
592 | } |
593 | ||
594 | /** | |
867e5e1d | 595 | * mem_cgroup_lruvec - get the lru list vector for a memcg & node |
55779ec7 JW |
596 | * @memcg: memcg of the wanted lruvec |
597 | * | |
867e5e1d JW |
598 | * Returns the lru list vector holding pages for a given @memcg & |
599 | * @node combination. This can be the node lruvec, if the memory | |
600 | * controller is disabled. | |
55779ec7 | 601 | */ |
867e5e1d JW |
602 | static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg, |
603 | struct pglist_data *pgdat) | |
55779ec7 | 604 | { |
ef8f2327 | 605 | struct mem_cgroup_per_node *mz; |
55779ec7 JW |
606 | struct lruvec *lruvec; |
607 | ||
608 | if (mem_cgroup_disabled()) { | |
867e5e1d | 609 | lruvec = &pgdat->__lruvec; |
55779ec7 JW |
610 | goto out; |
611 | } | |
612 | ||
1b05117d JW |
613 | if (!memcg) |
614 | memcg = root_mem_cgroup; | |
615 | ||
ef8f2327 | 616 | mz = mem_cgroup_nodeinfo(memcg, pgdat->node_id); |
55779ec7 JW |
617 | lruvec = &mz->lruvec; |
618 | out: | |
619 | /* | |
620 | * Since a node can be onlined after the mem_cgroup was created, | |
599d0c95 | 621 | * we have to be prepared to initialize lruvec->pgdat here; |
55779ec7 JW |
622 | * and if offlined then reonlined, we need to reinitialize it. |
623 | */ | |
ef8f2327 MG |
624 | if (unlikely(lruvec->pgdat != pgdat)) |
625 | lruvec->pgdat = pgdat; | |
55779ec7 JW |
626 | return lruvec; |
627 | } | |
628 | ||
599d0c95 | 629 | struct lruvec *mem_cgroup_page_lruvec(struct page *, struct pglist_data *); |
c9b0ed51 | 630 | |
64219994 | 631 | struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
e993d905 | 632 | |
d46eb14b SB |
633 | struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm); |
634 | ||
f745c6f5 SB |
635 | struct mem_cgroup *get_mem_cgroup_from_page(struct page *page); |
636 | ||
33398cf2 MH |
637 | static inline |
638 | struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){ | |
639 | return css ? container_of(css, struct mem_cgroup, css) : NULL; | |
640 | } | |
641 | ||
bf4f0599 RG |
642 | static inline bool obj_cgroup_tryget(struct obj_cgroup *objcg) |
643 | { | |
644 | return percpu_ref_tryget(&objcg->refcnt); | |
645 | } | |
646 | ||
647 | static inline void obj_cgroup_get(struct obj_cgroup *objcg) | |
648 | { | |
649 | percpu_ref_get(&objcg->refcnt); | |
650 | } | |
651 | ||
652 | static inline void obj_cgroup_put(struct obj_cgroup *objcg) | |
653 | { | |
654 | percpu_ref_put(&objcg->refcnt); | |
655 | } | |
656 | ||
657 | /* | |
658 | * After the initialization objcg->memcg is always pointing at | |
659 | * a valid memcg, but can be atomically swapped to the parent memcg. | |
660 | * | |
661 | * The caller must ensure that the returned memcg won't be released: | |
662 | * e.g. acquire the rcu_read_lock or css_set_lock. | |
663 | */ | |
664 | static inline struct mem_cgroup *obj_cgroup_memcg(struct obj_cgroup *objcg) | |
665 | { | |
666 | return READ_ONCE(objcg->memcg); | |
667 | } | |
668 | ||
dc0b5864 RG |
669 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
670 | { | |
d46eb14b SB |
671 | if (memcg) |
672 | css_put(&memcg->css); | |
dc0b5864 RG |
673 | } |
674 | ||
8e8ae645 JW |
675 | #define mem_cgroup_from_counter(counter, member) \ |
676 | container_of(counter, struct mem_cgroup, member) | |
677 | ||
33398cf2 MH |
678 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
679 | struct mem_cgroup *, | |
680 | struct mem_cgroup_reclaim_cookie *); | |
681 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); | |
7c5f64f8 VD |
682 | int mem_cgroup_scan_tasks(struct mem_cgroup *, |
683 | int (*)(struct task_struct *, void *), void *); | |
33398cf2 | 684 | |
23047a96 JW |
685 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
686 | { | |
687 | if (mem_cgroup_disabled()) | |
688 | return 0; | |
689 | ||
73f576c0 | 690 | return memcg->id.id; |
23047a96 | 691 | } |
73f576c0 | 692 | struct mem_cgroup *mem_cgroup_from_id(unsigned short id); |
23047a96 | 693 | |
aa9694bb CD |
694 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
695 | { | |
696 | return mem_cgroup_from_css(seq_css(m)); | |
697 | } | |
698 | ||
2262185c RG |
699 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
700 | { | |
701 | struct mem_cgroup_per_node *mz; | |
702 | ||
703 | if (mem_cgroup_disabled()) | |
704 | return NULL; | |
705 | ||
706 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
707 | return mz->memcg; | |
708 | } | |
709 | ||
8e8ae645 JW |
710 | /** |
711 | * parent_mem_cgroup - find the accounting parent of a memcg | |
712 | * @memcg: memcg whose parent to find | |
713 | * | |
714 | * Returns the parent memcg, or NULL if this is the root or the memory | |
715 | * controller is in legacy no-hierarchy mode. | |
716 | */ | |
717 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) | |
718 | { | |
719 | if (!memcg->memory.parent) | |
720 | return NULL; | |
721 | return mem_cgroup_from_counter(memcg->memory.parent, memory); | |
722 | } | |
723 | ||
33398cf2 MH |
724 | static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, |
725 | struct mem_cgroup *root) | |
726 | { | |
727 | if (root == memcg) | |
728 | return true; | |
729 | if (!root->use_hierarchy) | |
730 | return false; | |
731 | return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup); | |
732 | } | |
e1aab161 | 733 | |
2314b42d JW |
734 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
735 | struct mem_cgroup *memcg) | |
2e4d4091 | 736 | { |
587af308 | 737 | struct mem_cgroup *task_memcg; |
413918bb | 738 | bool match = false; |
c3ac9a8a | 739 | |
2e4d4091 | 740 | rcu_read_lock(); |
587af308 | 741 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
413918bb | 742 | if (task_memcg) |
2314b42d | 743 | match = mem_cgroup_is_descendant(task_memcg, memcg); |
2e4d4091 | 744 | rcu_read_unlock(); |
c3ac9a8a | 745 | return match; |
2e4d4091 | 746 | } |
8a9f3ccd | 747 | |
64219994 | 748 | struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page); |
2fc04524 | 749 | ino_t page_cgroup_ino(struct page *page); |
d324236b | 750 | |
eb01aaab VD |
751 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
752 | { | |
753 | if (mem_cgroup_disabled()) | |
754 | return true; | |
755 | return !!(memcg->css.flags & CSS_ONLINE); | |
756 | } | |
757 | ||
58ae83db KH |
758 | /* |
759 | * For memory reclaim. | |
760 | */ | |
889976db | 761 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
33398cf2 MH |
762 | |
763 | void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, | |
b4536f0c | 764 | int zid, int nr_pages); |
33398cf2 | 765 | |
b4536f0c MH |
766 | static inline |
767 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
768 | enum lru_list lru, int zone_idx) | |
769 | { | |
770 | struct mem_cgroup_per_node *mz; | |
771 | ||
772 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
e0e3f42f | 773 | return READ_ONCE(mz->lru_zone_size[zone_idx][lru]); |
33398cf2 MH |
774 | } |
775 | ||
b23afb93 TH |
776 | void mem_cgroup_handle_over_high(void); |
777 | ||
bbec2e15 | 778 | unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg); |
7c5f64f8 | 779 | |
9783aa99 CD |
780 | unsigned long mem_cgroup_size(struct mem_cgroup *memcg); |
781 | ||
f0c867d9 | 782 | void mem_cgroup_print_oom_context(struct mem_cgroup *memcg, |
64219994 | 783 | struct task_struct *p); |
58ae83db | 784 | |
f0c867d9 | 785 | void mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg); |
786 | ||
29ef680a | 787 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 | 788 | { |
29ef680a MH |
789 | WARN_ON(current->in_user_fault); |
790 | current->in_user_fault = 1; | |
519e5247 JW |
791 | } |
792 | ||
29ef680a | 793 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 | 794 | { |
29ef680a MH |
795 | WARN_ON(!current->in_user_fault); |
796 | current->in_user_fault = 0; | |
519e5247 JW |
797 | } |
798 | ||
3812c8c8 JW |
799 | static inline bool task_in_memcg_oom(struct task_struct *p) |
800 | { | |
626ebc41 | 801 | return p->memcg_in_oom; |
3812c8c8 JW |
802 | } |
803 | ||
49426420 | 804 | bool mem_cgroup_oom_synchronize(bool wait); |
3d8b38eb RG |
805 | struct mem_cgroup *mem_cgroup_get_oom_group(struct task_struct *victim, |
806 | struct mem_cgroup *oom_domain); | |
807 | void mem_cgroup_print_oom_group(struct mem_cgroup *memcg); | |
3812c8c8 | 808 | |
c255a458 | 809 | #ifdef CONFIG_MEMCG_SWAP |
eccb52e7 | 810 | extern bool cgroup_memory_noswap; |
c077719b | 811 | #endif |
f8d66542 | 812 | |
739f79fc JW |
813 | struct mem_cgroup *lock_page_memcg(struct page *page); |
814 | void __unlock_page_memcg(struct mem_cgroup *memcg); | |
62cccb8c | 815 | void unlock_page_memcg(struct page *page); |
d7365e78 | 816 | |
42a30035 JW |
817 | /* |
818 | * idx can be of type enum memcg_stat_item or node_stat_item. | |
819 | * Keep in sync with memcg_exact_page_state(). | |
820 | */ | |
821 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx) | |
822 | { | |
823 | long x = atomic_long_read(&memcg->vmstats[idx]); | |
824 | #ifdef CONFIG_SMP | |
825 | if (x < 0) | |
826 | x = 0; | |
827 | #endif | |
828 | return x; | |
829 | } | |
830 | ||
0b3d6e6f GT |
831 | /* |
832 | * idx can be of type enum memcg_stat_item or node_stat_item. | |
833 | * Keep in sync with memcg_exact_page_state(). | |
834 | */ | |
205b20cc JW |
835 | static inline unsigned long memcg_page_state_local(struct mem_cgroup *memcg, |
836 | int idx) | |
2a2e4885 | 837 | { |
815744d7 JW |
838 | long x = 0; |
839 | int cpu; | |
840 | ||
841 | for_each_possible_cpu(cpu) | |
842 | x += per_cpu(memcg->vmstats_local->stat[idx], cpu); | |
a983b5eb JW |
843 | #ifdef CONFIG_SMP |
844 | if (x < 0) | |
845 | x = 0; | |
846 | #endif | |
847 | return x; | |
2a2e4885 JW |
848 | } |
849 | ||
db9adbcb | 850 | void __mod_memcg_state(struct mem_cgroup *memcg, int idx, int val); |
2a2e4885 | 851 | |
04fecbf5 | 852 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 853 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 854 | int idx, int val) |
2a2e4885 | 855 | { |
c3cc3911 JW |
856 | unsigned long flags; |
857 | ||
858 | local_irq_save(flags); | |
a983b5eb | 859 | __mod_memcg_state(memcg, idx, val); |
c3cc3911 | 860 | local_irq_restore(flags); |
2a2e4885 JW |
861 | } |
862 | ||
33398cf2 | 863 | /** |
ccda7f43 | 864 | * mod_memcg_page_state - update page state statistics |
62cccb8c | 865 | * @page: the page |
33398cf2 MH |
866 | * @idx: page state item to account |
867 | * @val: number of pages (positive or negative) | |
868 | * | |
fdf1cdb9 JW |
869 | * The @page must be locked or the caller must use lock_page_memcg() |
870 | * to prevent double accounting when the page is concurrently being | |
871 | * moved to another memcg: | |
81f8c3a4 | 872 | * |
fdf1cdb9 | 873 | * lock_page(page) or lock_page_memcg(page) |
81f8c3a4 | 874 | * if (TestClearPageState(page)) |
ccda7f43 | 875 | * mod_memcg_page_state(page, state, -1); |
fdf1cdb9 | 876 | * unlock_page(page) or unlock_page_memcg(page) |
2a2e4885 JW |
877 | * |
878 | * Kernel pages are an exception to this, since they'll never move. | |
33398cf2 | 879 | */ |
00f3ca2c | 880 | static inline void __mod_memcg_page_state(struct page *page, |
04fecbf5 | 881 | int idx, int val) |
00f3ca2c | 882 | { |
bcfe06bf RG |
883 | struct mem_cgroup *memcg = page_memcg(page); |
884 | ||
885 | if (memcg) | |
886 | __mod_memcg_state(memcg, idx, val); | |
00f3ca2c JW |
887 | } |
888 | ||
ccda7f43 | 889 | static inline void mod_memcg_page_state(struct page *page, |
04fecbf5 | 890 | int idx, int val) |
33398cf2 | 891 | { |
bcfe06bf RG |
892 | struct mem_cgroup *memcg = page_memcg(page); |
893 | ||
894 | if (memcg) | |
895 | mod_memcg_state(memcg, idx, val); | |
33398cf2 MH |
896 | } |
897 | ||
42a30035 JW |
898 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
899 | enum node_stat_item idx) | |
900 | { | |
901 | struct mem_cgroup_per_node *pn; | |
902 | long x; | |
903 | ||
904 | if (mem_cgroup_disabled()) | |
905 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
906 | ||
907 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
908 | x = atomic_long_read(&pn->lruvec_stat[idx]); | |
909 | #ifdef CONFIG_SMP | |
910 | if (x < 0) | |
911 | x = 0; | |
912 | #endif | |
913 | return x; | |
914 | } | |
915 | ||
205b20cc JW |
916 | static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
917 | enum node_stat_item idx) | |
2a7106f2 | 918 | { |
00f3ca2c | 919 | struct mem_cgroup_per_node *pn; |
815744d7 JW |
920 | long x = 0; |
921 | int cpu; | |
00f3ca2c JW |
922 | |
923 | if (mem_cgroup_disabled()) | |
924 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
925 | ||
926 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
815744d7 JW |
927 | for_each_possible_cpu(cpu) |
928 | x += per_cpu(pn->lruvec_stat_local->count[idx], cpu); | |
a983b5eb JW |
929 | #ifdef CONFIG_SMP |
930 | if (x < 0) | |
931 | x = 0; | |
932 | #endif | |
933 | return x; | |
2a7106f2 GT |
934 | } |
935 | ||
eedc4e5a RG |
936 | void __mod_memcg_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx, |
937 | int val); | |
db9adbcb JW |
938 | void __mod_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx, |
939 | int val); | |
ec9f0238 | 940 | void __mod_lruvec_slab_state(void *p, enum node_stat_item idx, int val); |
991e7673 | 941 | |
8380ce47 | 942 | void mod_memcg_obj_state(void *p, int idx, int val); |
00f3ca2c | 943 | |
991e7673 SB |
944 | static inline void mod_lruvec_slab_state(void *p, enum node_stat_item idx, |
945 | int val) | |
946 | { | |
947 | unsigned long flags; | |
948 | ||
949 | local_irq_save(flags); | |
950 | __mod_lruvec_slab_state(p, idx, val); | |
951 | local_irq_restore(flags); | |
952 | } | |
953 | ||
eedc4e5a RG |
954 | static inline void mod_memcg_lruvec_state(struct lruvec *lruvec, |
955 | enum node_stat_item idx, int val) | |
956 | { | |
957 | unsigned long flags; | |
958 | ||
959 | local_irq_save(flags); | |
960 | __mod_memcg_lruvec_state(lruvec, idx, val); | |
961 | local_irq_restore(flags); | |
962 | } | |
963 | ||
00f3ca2c JW |
964 | static inline void mod_lruvec_state(struct lruvec *lruvec, |
965 | enum node_stat_item idx, int val) | |
966 | { | |
c3cc3911 JW |
967 | unsigned long flags; |
968 | ||
969 | local_irq_save(flags); | |
28454265 | 970 | __mod_lruvec_state(lruvec, idx, val); |
c3cc3911 | 971 | local_irq_restore(flags); |
00f3ca2c JW |
972 | } |
973 | ||
974 | static inline void __mod_lruvec_page_state(struct page *page, | |
975 | enum node_stat_item idx, int val) | |
976 | { | |
9da7b521 | 977 | struct page *head = compound_head(page); /* rmap on tail pages */ |
bcfe06bf | 978 | struct mem_cgroup *memcg = page_memcg(head); |
28454265 JW |
979 | pg_data_t *pgdat = page_pgdat(page); |
980 | struct lruvec *lruvec; | |
00f3ca2c | 981 | |
28454265 | 982 | /* Untracked pages have no memcg, no lruvec. Update only the node */ |
bcfe06bf | 983 | if (!memcg) { |
28454265 | 984 | __mod_node_page_state(pgdat, idx, val); |
00f3ca2c | 985 | return; |
28454265 JW |
986 | } |
987 | ||
bcfe06bf | 988 | lruvec = mem_cgroup_lruvec(memcg, pgdat); |
28454265 | 989 | __mod_lruvec_state(lruvec, idx, val); |
00f3ca2c JW |
990 | } |
991 | ||
992 | static inline void mod_lruvec_page_state(struct page *page, | |
993 | enum node_stat_item idx, int val) | |
994 | { | |
c3cc3911 JW |
995 | unsigned long flags; |
996 | ||
997 | local_irq_save(flags); | |
28454265 | 998 | __mod_lruvec_page_state(page, idx, val); |
c3cc3911 | 999 | local_irq_restore(flags); |
2a7106f2 GT |
1000 | } |
1001 | ||
ef8f2327 | 1002 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
1003 | gfp_t gfp_mask, |
1004 | unsigned long *total_scanned); | |
a63d83f4 | 1005 | |
db9adbcb JW |
1006 | void __count_memcg_events(struct mem_cgroup *memcg, enum vm_event_item idx, |
1007 | unsigned long count); | |
c9019e9b | 1008 | |
2262185c | 1009 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
e27be240 JW |
1010 | enum vm_event_item idx, |
1011 | unsigned long count) | |
2262185c | 1012 | { |
c3cc3911 JW |
1013 | unsigned long flags; |
1014 | ||
1015 | local_irq_save(flags); | |
a983b5eb | 1016 | __count_memcg_events(memcg, idx, count); |
c3cc3911 | 1017 | local_irq_restore(flags); |
2262185c RG |
1018 | } |
1019 | ||
1020 | static inline void count_memcg_page_event(struct page *page, | |
e27be240 | 1021 | enum vm_event_item idx) |
2262185c | 1022 | { |
bcfe06bf RG |
1023 | struct mem_cgroup *memcg = page_memcg(page); |
1024 | ||
1025 | if (memcg) | |
1026 | count_memcg_events(memcg, idx, 1); | |
2262185c RG |
1027 | } |
1028 | ||
1029 | static inline void count_memcg_event_mm(struct mm_struct *mm, | |
1030 | enum vm_event_item idx) | |
68ae564b | 1031 | { |
33398cf2 MH |
1032 | struct mem_cgroup *memcg; |
1033 | ||
68ae564b DR |
1034 | if (mem_cgroup_disabled()) |
1035 | return; | |
33398cf2 MH |
1036 | |
1037 | rcu_read_lock(); | |
1038 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
fe6bdfc8 | 1039 | if (likely(memcg)) |
c9019e9b | 1040 | count_memcg_events(memcg, idx, 1); |
33398cf2 | 1041 | rcu_read_unlock(); |
68ae564b | 1042 | } |
c9019e9b | 1043 | |
e27be240 JW |
1044 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
1045 | enum memcg_memory_event event) | |
c9019e9b | 1046 | { |
1e577f97 SB |
1047 | atomic_long_inc(&memcg->memory_events_local[event]); |
1048 | cgroup_file_notify(&memcg->events_local_file); | |
1049 | ||
9852ae3f CD |
1050 | do { |
1051 | atomic_long_inc(&memcg->memory_events[event]); | |
1052 | cgroup_file_notify(&memcg->events_file); | |
1053 | ||
04fd61a4 YS |
1054 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys)) |
1055 | break; | |
9852ae3f CD |
1056 | if (cgrp_dfl_root.flags & CGRP_ROOT_MEMORY_LOCAL_EVENTS) |
1057 | break; | |
1058 | } while ((memcg = parent_mem_cgroup(memcg)) && | |
1059 | !mem_cgroup_is_root(memcg)); | |
c9019e9b JW |
1060 | } |
1061 | ||
fe6bdfc8 RG |
1062 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
1063 | enum memcg_memory_event event) | |
1064 | { | |
1065 | struct mem_cgroup *memcg; | |
1066 | ||
1067 | if (mem_cgroup_disabled()) | |
1068 | return; | |
1069 | ||
1070 | rcu_read_lock(); | |
1071 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
1072 | if (likely(memcg)) | |
1073 | memcg_memory_event(memcg, event); | |
1074 | rcu_read_unlock(); | |
1075 | } | |
1076 | ||
ca3e0214 | 1077 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
e94c8a9c | 1078 | void mem_cgroup_split_huge_fixup(struct page *head); |
ca3e0214 KH |
1079 | #endif |
1080 | ||
c255a458 | 1081 | #else /* CONFIG_MEMCG */ |
23047a96 JW |
1082 | |
1083 | #define MEM_CGROUP_ID_SHIFT 0 | |
1084 | #define MEM_CGROUP_ID_MAX 0 | |
1085 | ||
7a81b88c KH |
1086 | struct mem_cgroup; |
1087 | ||
bcfe06bf RG |
1088 | static inline struct mem_cgroup *page_memcg(struct page *page) |
1089 | { | |
1090 | return NULL; | |
1091 | } | |
1092 | ||
1093 | static inline struct mem_cgroup *page_memcg_rcu(struct page *page) | |
1094 | { | |
1095 | WARN_ON_ONCE(!rcu_read_lock_held()); | |
1096 | return NULL; | |
1097 | } | |
1098 | ||
1099 | static inline struct mem_cgroup *page_memcg_check(struct page *page) | |
1100 | { | |
1101 | return NULL; | |
1102 | } | |
1103 | ||
dfd2f10c KT |
1104 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
1105 | { | |
1106 | return true; | |
1107 | } | |
1108 | ||
23047a96 JW |
1109 | static inline bool mem_cgroup_disabled(void) |
1110 | { | |
1111 | return true; | |
1112 | } | |
1113 | ||
e27be240 JW |
1114 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
1115 | enum memcg_memory_event event) | |
241994ed JW |
1116 | { |
1117 | } | |
1118 | ||
fe6bdfc8 RG |
1119 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
1120 | enum memcg_memory_event event) | |
1121 | { | |
1122 | } | |
1123 | ||
22f7496f YS |
1124 | static inline unsigned long mem_cgroup_protection(struct mem_cgroup *root, |
1125 | struct mem_cgroup *memcg, | |
1bc63fb1 | 1126 | bool in_low_reclaim) |
9783aa99 | 1127 | { |
1bc63fb1 | 1128 | return 0; |
9783aa99 CD |
1129 | } |
1130 | ||
45c7f7e1 CD |
1131 | static inline void mem_cgroup_calculate_protection(struct mem_cgroup *root, |
1132 | struct mem_cgroup *memcg) | |
1133 | { | |
1134 | } | |
1135 | ||
1136 | static inline bool mem_cgroup_below_low(struct mem_cgroup *memcg) | |
1137 | { | |
1138 | return false; | |
1139 | } | |
1140 | ||
1141 | static inline bool mem_cgroup_below_min(struct mem_cgroup *memcg) | |
241994ed | 1142 | { |
45c7f7e1 | 1143 | return false; |
241994ed JW |
1144 | } |
1145 | ||
3fea5a49 | 1146 | static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm, |
d9eb1ea2 | 1147 | gfp_t gfp_mask) |
3fea5a49 JW |
1148 | { |
1149 | return 0; | |
1150 | } | |
1151 | ||
0a31bc97 | 1152 | static inline void mem_cgroup_uncharge(struct page *page) |
569b846d KH |
1153 | { |
1154 | } | |
1155 | ||
747db954 | 1156 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
8a9f3ccd BS |
1157 | { |
1158 | } | |
1159 | ||
6a93ca8f | 1160 | static inline void mem_cgroup_migrate(struct page *old, struct page *new) |
69029cd5 KH |
1161 | { |
1162 | } | |
1163 | ||
867e5e1d JW |
1164 | static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg, |
1165 | struct pglist_data *pgdat) | |
08e552c6 | 1166 | { |
867e5e1d | 1167 | return &pgdat->__lruvec; |
08e552c6 KH |
1168 | } |
1169 | ||
fa9add64 | 1170 | static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, |
599d0c95 | 1171 | struct pglist_data *pgdat) |
66e1707b | 1172 | { |
867e5e1d | 1173 | return &pgdat->__lruvec; |
66e1707b BS |
1174 | } |
1175 | ||
b910718a JW |
1176 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) |
1177 | { | |
1178 | return NULL; | |
1179 | } | |
1180 | ||
587af308 | 1181 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
c0ff4b85 | 1182 | struct mem_cgroup *memcg) |
bed7161a | 1183 | { |
587af308 | 1184 | return true; |
bed7161a BS |
1185 | } |
1186 | ||
d46eb14b SB |
1187 | static inline struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm) |
1188 | { | |
1189 | return NULL; | |
1190 | } | |
1191 | ||
f745c6f5 SB |
1192 | static inline struct mem_cgroup *get_mem_cgroup_from_page(struct page *page) |
1193 | { | |
1194 | return NULL; | |
1195 | } | |
1196 | ||
dc0b5864 RG |
1197 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
1198 | { | |
1199 | } | |
1200 | ||
5660048c JW |
1201 | static inline struct mem_cgroup * |
1202 | mem_cgroup_iter(struct mem_cgroup *root, | |
1203 | struct mem_cgroup *prev, | |
1204 | struct mem_cgroup_reclaim_cookie *reclaim) | |
1205 | { | |
1206 | return NULL; | |
1207 | } | |
1208 | ||
1209 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
1210 | struct mem_cgroup *prev) | |
1211 | { | |
1212 | } | |
1213 | ||
7c5f64f8 VD |
1214 | static inline int mem_cgroup_scan_tasks(struct mem_cgroup *memcg, |
1215 | int (*fn)(struct task_struct *, void *), void *arg) | |
1216 | { | |
1217 | return 0; | |
1218 | } | |
1219 | ||
23047a96 | 1220 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
f8d66542 | 1221 | { |
23047a96 JW |
1222 | return 0; |
1223 | } | |
1224 | ||
1225 | static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id) | |
1226 | { | |
1227 | WARN_ON_ONCE(id); | |
1228 | /* XXX: This should always return root_mem_cgroup */ | |
1229 | return NULL; | |
f8d66542 | 1230 | } |
a636b327 | 1231 | |
aa9694bb CD |
1232 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
1233 | { | |
1234 | return NULL; | |
1235 | } | |
1236 | ||
2262185c RG |
1237 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
1238 | { | |
1239 | return NULL; | |
1240 | } | |
1241 | ||
eb01aaab | 1242 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
14797e23 | 1243 | { |
13308ca9 | 1244 | return true; |
14797e23 KM |
1245 | } |
1246 | ||
b4536f0c MH |
1247 | static inline |
1248 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
1249 | enum lru_list lru, int zone_idx) | |
1250 | { | |
1251 | return 0; | |
1252 | } | |
a3d8e054 | 1253 | |
bbec2e15 | 1254 | static inline unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg) |
7c5f64f8 VD |
1255 | { |
1256 | return 0; | |
1257 | } | |
1258 | ||
9783aa99 CD |
1259 | static inline unsigned long mem_cgroup_size(struct mem_cgroup *memcg) |
1260 | { | |
1261 | return 0; | |
1262 | } | |
1263 | ||
e222432b | 1264 | static inline void |
f0c867d9 | 1265 | mem_cgroup_print_oom_context(struct mem_cgroup *memcg, struct task_struct *p) |
1266 | { | |
1267 | } | |
1268 | ||
1269 | static inline void | |
1270 | mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg) | |
e222432b BS |
1271 | { |
1272 | } | |
1273 | ||
739f79fc JW |
1274 | static inline struct mem_cgroup *lock_page_memcg(struct page *page) |
1275 | { | |
1276 | return NULL; | |
1277 | } | |
1278 | ||
1279 | static inline void __unlock_page_memcg(struct mem_cgroup *memcg) | |
89c06bd5 KH |
1280 | { |
1281 | } | |
1282 | ||
62cccb8c | 1283 | static inline void unlock_page_memcg(struct page *page) |
89c06bd5 KH |
1284 | { |
1285 | } | |
1286 | ||
b23afb93 TH |
1287 | static inline void mem_cgroup_handle_over_high(void) |
1288 | { | |
1289 | } | |
1290 | ||
29ef680a | 1291 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 JW |
1292 | { |
1293 | } | |
1294 | ||
29ef680a | 1295 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 JW |
1296 | { |
1297 | } | |
1298 | ||
3812c8c8 JW |
1299 | static inline bool task_in_memcg_oom(struct task_struct *p) |
1300 | { | |
1301 | return false; | |
1302 | } | |
1303 | ||
49426420 | 1304 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
3812c8c8 JW |
1305 | { |
1306 | return false; | |
1307 | } | |
1308 | ||
3d8b38eb RG |
1309 | static inline struct mem_cgroup *mem_cgroup_get_oom_group( |
1310 | struct task_struct *victim, struct mem_cgroup *oom_domain) | |
1311 | { | |
1312 | return NULL; | |
1313 | } | |
1314 | ||
1315 | static inline void mem_cgroup_print_oom_group(struct mem_cgroup *memcg) | |
1316 | { | |
1317 | } | |
1318 | ||
42a30035 JW |
1319 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx) |
1320 | { | |
1321 | return 0; | |
1322 | } | |
1323 | ||
205b20cc JW |
1324 | static inline unsigned long memcg_page_state_local(struct mem_cgroup *memcg, |
1325 | int idx) | |
2a2e4885 JW |
1326 | { |
1327 | return 0; | |
1328 | } | |
1329 | ||
00f3ca2c | 1330 | static inline void __mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1331 | int idx, |
00f3ca2c | 1332 | int nr) |
2a2e4885 JW |
1333 | { |
1334 | } | |
1335 | ||
00f3ca2c | 1336 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1337 | int idx, |
00f3ca2c | 1338 | int nr) |
2a2e4885 JW |
1339 | { |
1340 | } | |
1341 | ||
00f3ca2c | 1342 | static inline void __mod_memcg_page_state(struct page *page, |
04fecbf5 | 1343 | int idx, |
00f3ca2c | 1344 | int nr) |
2a2e4885 JW |
1345 | { |
1346 | } | |
1347 | ||
ccda7f43 | 1348 | static inline void mod_memcg_page_state(struct page *page, |
04fecbf5 | 1349 | int idx, |
ccda7f43 | 1350 | int nr) |
553af430 JW |
1351 | { |
1352 | } | |
1353 | ||
42a30035 JW |
1354 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
1355 | enum node_stat_item idx) | |
1356 | { | |
1357 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
1358 | } | |
1359 | ||
205b20cc JW |
1360 | static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
1361 | enum node_stat_item idx) | |
2a7106f2 | 1362 | { |
00f3ca2c | 1363 | return node_page_state(lruvec_pgdat(lruvec), idx); |
2a7106f2 GT |
1364 | } |
1365 | ||
eedc4e5a RG |
1366 | static inline void __mod_memcg_lruvec_state(struct lruvec *lruvec, |
1367 | enum node_stat_item idx, int val) | |
1368 | { | |
1369 | } | |
1370 | ||
00f3ca2c JW |
1371 | static inline void __mod_lruvec_state(struct lruvec *lruvec, |
1372 | enum node_stat_item idx, int val) | |
d69b042f | 1373 | { |
00f3ca2c JW |
1374 | __mod_node_page_state(lruvec_pgdat(lruvec), idx, val); |
1375 | } | |
1376 | ||
1377 | static inline void mod_lruvec_state(struct lruvec *lruvec, | |
1378 | enum node_stat_item idx, int val) | |
1379 | { | |
1380 | mod_node_page_state(lruvec_pgdat(lruvec), idx, val); | |
1381 | } | |
1382 | ||
1383 | static inline void __mod_lruvec_page_state(struct page *page, | |
1384 | enum node_stat_item idx, int val) | |
1385 | { | |
1386 | __mod_node_page_state(page_pgdat(page), idx, val); | |
1387 | } | |
1388 | ||
1389 | static inline void mod_lruvec_page_state(struct page *page, | |
1390 | enum node_stat_item idx, int val) | |
1391 | { | |
1392 | mod_node_page_state(page_pgdat(page), idx, val); | |
d69b042f BS |
1393 | } |
1394 | ||
ec9f0238 RG |
1395 | static inline void __mod_lruvec_slab_state(void *p, enum node_stat_item idx, |
1396 | int val) | |
1397 | { | |
1398 | struct page *page = virt_to_head_page(p); | |
1399 | ||
1400 | __mod_node_page_state(page_pgdat(page), idx, val); | |
1401 | } | |
1402 | ||
991e7673 SB |
1403 | static inline void mod_lruvec_slab_state(void *p, enum node_stat_item idx, |
1404 | int val) | |
1405 | { | |
1406 | struct page *page = virt_to_head_page(p); | |
1407 | ||
1408 | mod_node_page_state(page_pgdat(page), idx, val); | |
1409 | } | |
1410 | ||
8380ce47 RG |
1411 | static inline void mod_memcg_obj_state(void *p, int idx, int val) |
1412 | { | |
1413 | } | |
1414 | ||
4e416953 | 1415 | static inline |
ef8f2327 | 1416 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
1417 | gfp_t gfp_mask, |
1418 | unsigned long *total_scanned) | |
4e416953 | 1419 | { |
0608f43d | 1420 | return 0; |
4e416953 BS |
1421 | } |
1422 | ||
e94c8a9c | 1423 | static inline void mem_cgroup_split_huge_fixup(struct page *head) |
ca3e0214 KH |
1424 | { |
1425 | } | |
1426 | ||
2262185c RG |
1427 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
1428 | enum vm_event_item idx, | |
1429 | unsigned long count) | |
1430 | { | |
1431 | } | |
1432 | ||
9851ac13 KT |
1433 | static inline void __count_memcg_events(struct mem_cgroup *memcg, |
1434 | enum vm_event_item idx, | |
1435 | unsigned long count) | |
1436 | { | |
1437 | } | |
1438 | ||
2262185c | 1439 | static inline void count_memcg_page_event(struct page *page, |
04fecbf5 | 1440 | int idx) |
2262185c RG |
1441 | { |
1442 | } | |
1443 | ||
456f998e | 1444 | static inline |
2262185c | 1445 | void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx) |
456f998e YH |
1446 | { |
1447 | } | |
c255a458 | 1448 | #endif /* CONFIG_MEMCG */ |
78fb7466 | 1449 | |
04fecbf5 | 1450 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1451 | static inline void __inc_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1452 | int idx) |
00f3ca2c JW |
1453 | { |
1454 | __mod_memcg_state(memcg, idx, 1); | |
1455 | } | |
1456 | ||
04fecbf5 | 1457 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1458 | static inline void __dec_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1459 | int idx) |
00f3ca2c JW |
1460 | { |
1461 | __mod_memcg_state(memcg, idx, -1); | |
1462 | } | |
1463 | ||
04fecbf5 | 1464 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1465 | static inline void __inc_memcg_page_state(struct page *page, |
04fecbf5 | 1466 | int idx) |
00f3ca2c JW |
1467 | { |
1468 | __mod_memcg_page_state(page, idx, 1); | |
1469 | } | |
1470 | ||
04fecbf5 | 1471 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1472 | static inline void __dec_memcg_page_state(struct page *page, |
04fecbf5 | 1473 | int idx) |
00f3ca2c JW |
1474 | { |
1475 | __mod_memcg_page_state(page, idx, -1); | |
1476 | } | |
1477 | ||
1478 | static inline void __inc_lruvec_state(struct lruvec *lruvec, | |
1479 | enum node_stat_item idx) | |
1480 | { | |
1481 | __mod_lruvec_state(lruvec, idx, 1); | |
1482 | } | |
1483 | ||
1484 | static inline void __dec_lruvec_state(struct lruvec *lruvec, | |
1485 | enum node_stat_item idx) | |
1486 | { | |
1487 | __mod_lruvec_state(lruvec, idx, -1); | |
1488 | } | |
1489 | ||
1490 | static inline void __inc_lruvec_page_state(struct page *page, | |
1491 | enum node_stat_item idx) | |
1492 | { | |
1493 | __mod_lruvec_page_state(page, idx, 1); | |
1494 | } | |
1495 | ||
1496 | static inline void __dec_lruvec_page_state(struct page *page, | |
1497 | enum node_stat_item idx) | |
1498 | { | |
1499 | __mod_lruvec_page_state(page, idx, -1); | |
1500 | } | |
1501 | ||
ec9f0238 RG |
1502 | static inline void __inc_lruvec_slab_state(void *p, enum node_stat_item idx) |
1503 | { | |
1504 | __mod_lruvec_slab_state(p, idx, 1); | |
1505 | } | |
1506 | ||
1507 | static inline void __dec_lruvec_slab_state(void *p, enum node_stat_item idx) | |
1508 | { | |
1509 | __mod_lruvec_slab_state(p, idx, -1); | |
1510 | } | |
1511 | ||
04fecbf5 | 1512 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1513 | static inline void inc_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1514 | int idx) |
00f3ca2c JW |
1515 | { |
1516 | mod_memcg_state(memcg, idx, 1); | |
1517 | } | |
1518 | ||
04fecbf5 | 1519 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1520 | static inline void dec_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1521 | int idx) |
00f3ca2c JW |
1522 | { |
1523 | mod_memcg_state(memcg, idx, -1); | |
1524 | } | |
1525 | ||
04fecbf5 | 1526 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1527 | static inline void inc_memcg_page_state(struct page *page, |
04fecbf5 | 1528 | int idx) |
00f3ca2c JW |
1529 | { |
1530 | mod_memcg_page_state(page, idx, 1); | |
1531 | } | |
1532 | ||
04fecbf5 | 1533 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 1534 | static inline void dec_memcg_page_state(struct page *page, |
04fecbf5 | 1535 | int idx) |
00f3ca2c JW |
1536 | { |
1537 | mod_memcg_page_state(page, idx, -1); | |
1538 | } | |
1539 | ||
1540 | static inline void inc_lruvec_state(struct lruvec *lruvec, | |
1541 | enum node_stat_item idx) | |
1542 | { | |
1543 | mod_lruvec_state(lruvec, idx, 1); | |
1544 | } | |
1545 | ||
1546 | static inline void dec_lruvec_state(struct lruvec *lruvec, | |
1547 | enum node_stat_item idx) | |
1548 | { | |
1549 | mod_lruvec_state(lruvec, idx, -1); | |
1550 | } | |
1551 | ||
1552 | static inline void inc_lruvec_page_state(struct page *page, | |
1553 | enum node_stat_item idx) | |
1554 | { | |
1555 | mod_lruvec_page_state(page, idx, 1); | |
1556 | } | |
1557 | ||
1558 | static inline void dec_lruvec_page_state(struct page *page, | |
1559 | enum node_stat_item idx) | |
1560 | { | |
1561 | mod_lruvec_page_state(page, idx, -1); | |
1562 | } | |
1563 | ||
7cf111bc JW |
1564 | static inline struct lruvec *parent_lruvec(struct lruvec *lruvec) |
1565 | { | |
1566 | struct mem_cgroup *memcg; | |
1567 | ||
1568 | memcg = lruvec_memcg(lruvec); | |
1569 | if (!memcg) | |
1570 | return NULL; | |
1571 | memcg = parent_mem_cgroup(memcg); | |
1572 | if (!memcg) | |
1573 | return NULL; | |
1574 | return mem_cgroup_lruvec(memcg, lruvec_pgdat(lruvec)); | |
1575 | } | |
1576 | ||
52ebea74 | 1577 | #ifdef CONFIG_CGROUP_WRITEBACK |
841710aa | 1578 | |
841710aa | 1579 | struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb); |
c5edf9cd TH |
1580 | void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages, |
1581 | unsigned long *pheadroom, unsigned long *pdirty, | |
1582 | unsigned long *pwriteback); | |
841710aa | 1583 | |
97b27821 TH |
1584 | void mem_cgroup_track_foreign_dirty_slowpath(struct page *page, |
1585 | struct bdi_writeback *wb); | |
1586 | ||
1587 | static inline void mem_cgroup_track_foreign_dirty(struct page *page, | |
1588 | struct bdi_writeback *wb) | |
1589 | { | |
08d1d0e6 BH |
1590 | if (mem_cgroup_disabled()) |
1591 | return; | |
1592 | ||
bcfe06bf | 1593 | if (unlikely(&page_memcg(page)->css != wb->memcg_css)) |
97b27821 TH |
1594 | mem_cgroup_track_foreign_dirty_slowpath(page, wb); |
1595 | } | |
1596 | ||
1597 | void mem_cgroup_flush_foreign(struct bdi_writeback *wb); | |
1598 | ||
841710aa TH |
1599 | #else /* CONFIG_CGROUP_WRITEBACK */ |
1600 | ||
1601 | static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb) | |
1602 | { | |
1603 | return NULL; | |
1604 | } | |
1605 | ||
c2aa723a | 1606 | static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb, |
c5edf9cd TH |
1607 | unsigned long *pfilepages, |
1608 | unsigned long *pheadroom, | |
c2aa723a TH |
1609 | unsigned long *pdirty, |
1610 | unsigned long *pwriteback) | |
1611 | { | |
1612 | } | |
1613 | ||
97b27821 TH |
1614 | static inline void mem_cgroup_track_foreign_dirty(struct page *page, |
1615 | struct bdi_writeback *wb) | |
1616 | { | |
1617 | } | |
1618 | ||
1619 | static inline void mem_cgroup_flush_foreign(struct bdi_writeback *wb) | |
1620 | { | |
1621 | } | |
1622 | ||
841710aa | 1623 | #endif /* CONFIG_CGROUP_WRITEBACK */ |
52ebea74 | 1624 | |
e1aab161 | 1625 | struct sock; |
baac50bb JW |
1626 | bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); |
1627 | void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); | |
d886f4e4 | 1628 | #ifdef CONFIG_MEMCG |
ef12947c JW |
1629 | extern struct static_key_false memcg_sockets_enabled_key; |
1630 | #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key) | |
2d758073 JW |
1631 | void mem_cgroup_sk_alloc(struct sock *sk); |
1632 | void mem_cgroup_sk_free(struct sock *sk); | |
baac50bb | 1633 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c | 1634 | { |
0db15298 | 1635 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && memcg->tcpmem_pressure) |
8e8ae645 | 1636 | return true; |
8e8ae645 JW |
1637 | do { |
1638 | if (time_before(jiffies, memcg->socket_pressure)) | |
1639 | return true; | |
1640 | } while ((memcg = parent_mem_cgroup(memcg))); | |
1641 | return false; | |
e805605c | 1642 | } |
0a432dcb YS |
1643 | |
1644 | extern int memcg_expand_shrinker_maps(int new_id); | |
1645 | ||
1646 | extern void memcg_set_shrinker_bit(struct mem_cgroup *memcg, | |
1647 | int nid, int shrinker_id); | |
e805605c | 1648 | #else |
80e95fe0 | 1649 | #define mem_cgroup_sockets_enabled 0 |
2d758073 JW |
1650 | static inline void mem_cgroup_sk_alloc(struct sock *sk) { }; |
1651 | static inline void mem_cgroup_sk_free(struct sock *sk) { }; | |
baac50bb | 1652 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c JW |
1653 | { |
1654 | return false; | |
1655 | } | |
0a432dcb YS |
1656 | |
1657 | static inline void memcg_set_shrinker_bit(struct mem_cgroup *memcg, | |
1658 | int nid, int shrinker_id) | |
1659 | { | |
1660 | } | |
e805605c | 1661 | #endif |
7ae1e1d0 | 1662 | |
9b6f7e16 | 1663 | #ifdef CONFIG_MEMCG_KMEM |
4b13f64d RG |
1664 | int __memcg_kmem_charge(struct mem_cgroup *memcg, gfp_t gfp, |
1665 | unsigned int nr_pages); | |
1666 | void __memcg_kmem_uncharge(struct mem_cgroup *memcg, unsigned int nr_pages); | |
f4b00eab RG |
1667 | int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, int order); |
1668 | void __memcg_kmem_uncharge_page(struct page *page, int order); | |
45264778 | 1669 | |
bf4f0599 RG |
1670 | struct obj_cgroup *get_obj_cgroup_from_current(void); |
1671 | ||
1672 | int obj_cgroup_charge(struct obj_cgroup *objcg, gfp_t gfp, size_t size); | |
1673 | void obj_cgroup_uncharge(struct obj_cgroup *objcg, size_t size); | |
1674 | ||
ef12947c | 1675 | extern struct static_key_false memcg_kmem_enabled_key; |
749c5415 | 1676 | |
dbcf73e2 | 1677 | extern int memcg_nr_cache_ids; |
64219994 MH |
1678 | void memcg_get_cache_ids(void); |
1679 | void memcg_put_cache_ids(void); | |
ebe945c2 GC |
1680 | |
1681 | /* | |
1682 | * Helper macro to loop through all memcg-specific caches. Callers must still | |
1683 | * check if the cache is valid (it is either valid or NULL). | |
1684 | * the slab_mutex must be held when looping through those caches | |
1685 | */ | |
749c5415 | 1686 | #define for_each_memcg_cache_index(_idx) \ |
dbcf73e2 | 1687 | for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++) |
749c5415 | 1688 | |
7ae1e1d0 GC |
1689 | static inline bool memcg_kmem_enabled(void) |
1690 | { | |
eda330e5 | 1691 | return static_branch_likely(&memcg_kmem_enabled_key); |
7ae1e1d0 GC |
1692 | } |
1693 | ||
f4b00eab RG |
1694 | static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1695 | int order) | |
60cd4bcd SB |
1696 | { |
1697 | if (memcg_kmem_enabled()) | |
f4b00eab | 1698 | return __memcg_kmem_charge_page(page, gfp, order); |
60cd4bcd SB |
1699 | return 0; |
1700 | } | |
1701 | ||
f4b00eab | 1702 | static inline void memcg_kmem_uncharge_page(struct page *page, int order) |
60cd4bcd SB |
1703 | { |
1704 | if (memcg_kmem_enabled()) | |
f4b00eab | 1705 | __memcg_kmem_uncharge_page(page, order); |
60cd4bcd SB |
1706 | } |
1707 | ||
4b13f64d RG |
1708 | static inline int memcg_kmem_charge(struct mem_cgroup *memcg, gfp_t gfp, |
1709 | unsigned int nr_pages) | |
60cd4bcd SB |
1710 | { |
1711 | if (memcg_kmem_enabled()) | |
4b13f64d | 1712 | return __memcg_kmem_charge(memcg, gfp, nr_pages); |
60cd4bcd SB |
1713 | return 0; |
1714 | } | |
49a18eae | 1715 | |
4b13f64d RG |
1716 | static inline void memcg_kmem_uncharge(struct mem_cgroup *memcg, |
1717 | unsigned int nr_pages) | |
49a18eae RG |
1718 | { |
1719 | if (memcg_kmem_enabled()) | |
4b13f64d | 1720 | __memcg_kmem_uncharge(memcg, nr_pages); |
49a18eae RG |
1721 | } |
1722 | ||
33398cf2 | 1723 | /* |
9f706d68 | 1724 | * helper for accessing a memcg's index. It will be used as an index in the |
33398cf2 MH |
1725 | * child cache array in kmem_cache, and also to derive its name. This function |
1726 | * will return -1 when this is not a kmem-limited memcg. | |
1727 | */ | |
1728 | static inline int memcg_cache_id(struct mem_cgroup *memcg) | |
1729 | { | |
1730 | return memcg ? memcg->kmemcg_id : -1; | |
1731 | } | |
5722d094 | 1732 | |
8380ce47 RG |
1733 | struct mem_cgroup *mem_cgroup_from_obj(void *p); |
1734 | ||
7ae1e1d0 | 1735 | #else |
9b6f7e16 | 1736 | |
f4b00eab RG |
1737 | static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1738 | int order) | |
9b6f7e16 RG |
1739 | { |
1740 | return 0; | |
1741 | } | |
1742 | ||
f4b00eab | 1743 | static inline void memcg_kmem_uncharge_page(struct page *page, int order) |
9b6f7e16 RG |
1744 | { |
1745 | } | |
1746 | ||
f4b00eab RG |
1747 | static inline int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1748 | int order) | |
60cd4bcd SB |
1749 | { |
1750 | return 0; | |
1751 | } | |
1752 | ||
f4b00eab | 1753 | static inline void __memcg_kmem_uncharge_page(struct page *page, int order) |
60cd4bcd SB |
1754 | { |
1755 | } | |
1756 | ||
749c5415 GC |
1757 | #define for_each_memcg_cache_index(_idx) \ |
1758 | for (; NULL; ) | |
1759 | ||
b9ce5ef4 GC |
1760 | static inline bool memcg_kmem_enabled(void) |
1761 | { | |
1762 | return false; | |
1763 | } | |
1764 | ||
2633d7a0 GC |
1765 | static inline int memcg_cache_id(struct mem_cgroup *memcg) |
1766 | { | |
1767 | return -1; | |
1768 | } | |
1769 | ||
05257a1a VD |
1770 | static inline void memcg_get_cache_ids(void) |
1771 | { | |
1772 | } | |
1773 | ||
1774 | static inline void memcg_put_cache_ids(void) | |
1775 | { | |
1776 | } | |
1777 | ||
8380ce47 RG |
1778 | static inline struct mem_cgroup *mem_cgroup_from_obj(void *p) |
1779 | { | |
1780 | return NULL; | |
1781 | } | |
1782 | ||
84c07d11 | 1783 | #endif /* CONFIG_MEMCG_KMEM */ |
127424c8 | 1784 | |
8cdea7c0 | 1785 | #endif /* _LINUX_MEMCONTROL_H */ |