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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 | ||
f3344adf MS |
95 | struct batched_lruvec_stat { |
96 | s32 count[NR_VM_NODE_STAT_ITEMS]; | |
97 | }; | |
98 | ||
0a4465d3 KT |
99 | /* |
100 | * Bitmap of shrinker::id corresponding to memcg-aware shrinkers, | |
101 | * which have elements charged to this memcg. | |
102 | */ | |
103 | struct memcg_shrinker_map { | |
104 | struct rcu_head rcu; | |
307ed94c | 105 | unsigned long map[]; |
0a4465d3 KT |
106 | }; |
107 | ||
33398cf2 | 108 | /* |
242c37b4 | 109 | * per-node information in memory controller. |
33398cf2 | 110 | */ |
ef8f2327 | 111 | struct mem_cgroup_per_node { |
33398cf2 | 112 | struct lruvec lruvec; |
a983b5eb | 113 | |
f3344adf MS |
114 | /* |
115 | * Legacy local VM stats. This should be struct lruvec_stat and | |
116 | * cannot be optimized to struct batched_lruvec_stat. Because | |
117 | * the threshold of the lruvec_stat_cpu can be as big as | |
118 | * MEMCG_CHARGE_BATCH * PAGE_SIZE. It can fit into s32. But this | |
119 | * filed has no upper limit. | |
120 | */ | |
815744d7 JW |
121 | struct lruvec_stat __percpu *lruvec_stat_local; |
122 | ||
123 | /* Subtree VM stats (batched updates) */ | |
f3344adf | 124 | struct batched_lruvec_stat __percpu *lruvec_stat_cpu; |
a983b5eb JW |
125 | atomic_long_t lruvec_stat[NR_VM_NODE_STAT_ITEMS]; |
126 | ||
b4536f0c | 127 | unsigned long lru_zone_size[MAX_NR_ZONES][NR_LRU_LISTS]; |
33398cf2 | 128 | |
9da83f3f | 129 | struct mem_cgroup_reclaim_iter iter; |
33398cf2 | 130 | |
0a4465d3 | 131 | struct memcg_shrinker_map __rcu *shrinker_map; |
0a432dcb | 132 | |
33398cf2 MH |
133 | struct rb_node tree_node; /* RB tree node */ |
134 | unsigned long usage_in_excess;/* Set to the value by which */ | |
135 | /* the soft limit is exceeded*/ | |
136 | bool on_tree; | |
137 | struct mem_cgroup *memcg; /* Back pointer, we cannot */ | |
138 | /* use container_of */ | |
139 | }; | |
140 | ||
33398cf2 MH |
141 | struct mem_cgroup_threshold { |
142 | struct eventfd_ctx *eventfd; | |
143 | unsigned long threshold; | |
144 | }; | |
145 | ||
146 | /* For threshold */ | |
147 | struct mem_cgroup_threshold_ary { | |
148 | /* An array index points to threshold just below or equal to usage. */ | |
149 | int current_threshold; | |
150 | /* Size of entries[] */ | |
151 | unsigned int size; | |
152 | /* Array of thresholds */ | |
307ed94c | 153 | struct mem_cgroup_threshold entries[]; |
33398cf2 MH |
154 | }; |
155 | ||
156 | struct mem_cgroup_thresholds { | |
157 | /* Primary thresholds array */ | |
158 | struct mem_cgroup_threshold_ary *primary; | |
159 | /* | |
160 | * Spare threshold array. | |
161 | * This is needed to make mem_cgroup_unregister_event() "never fail". | |
162 | * It must be able to store at least primary->size - 1 entries. | |
163 | */ | |
164 | struct mem_cgroup_threshold_ary *spare; | |
165 | }; | |
166 | ||
567e9ab2 JW |
167 | enum memcg_kmem_state { |
168 | KMEM_NONE, | |
169 | KMEM_ALLOCATED, | |
170 | KMEM_ONLINE, | |
171 | }; | |
172 | ||
e81bf979 AL |
173 | #if defined(CONFIG_SMP) |
174 | struct memcg_padding { | |
175 | char x[0]; | |
176 | } ____cacheline_internodealigned_in_smp; | |
177 | #define MEMCG_PADDING(name) struct memcg_padding name; | |
178 | #else | |
179 | #define MEMCG_PADDING(name) | |
180 | #endif | |
181 | ||
97b27821 TH |
182 | /* |
183 | * Remember four most recent foreign writebacks with dirty pages in this | |
184 | * cgroup. Inode sharing is expected to be uncommon and, even if we miss | |
185 | * one in a given round, we're likely to catch it later if it keeps | |
186 | * foreign-dirtying, so a fairly low count should be enough. | |
187 | * | |
188 | * See mem_cgroup_track_foreign_dirty_slowpath() for details. | |
189 | */ | |
190 | #define MEMCG_CGWB_FRN_CNT 4 | |
191 | ||
192 | struct memcg_cgwb_frn { | |
193 | u64 bdi_id; /* bdi->id of the foreign inode */ | |
194 | int memcg_id; /* memcg->css.id of foreign inode */ | |
195 | u64 at; /* jiffies_64 at the time of dirtying */ | |
196 | struct wb_completion done; /* tracks in-flight foreign writebacks */ | |
197 | }; | |
198 | ||
bf4f0599 RG |
199 | /* |
200 | * Bucket for arbitrarily byte-sized objects charged to a memory | |
201 | * cgroup. The bucket can be reparented in one piece when the cgroup | |
202 | * is destroyed, without having to round up the individual references | |
203 | * of all live memory objects in the wild. | |
204 | */ | |
205 | struct obj_cgroup { | |
206 | struct percpu_ref refcnt; | |
207 | struct mem_cgroup *memcg; | |
208 | atomic_t nr_charged_bytes; | |
209 | union { | |
210 | struct list_head list; | |
211 | struct rcu_head rcu; | |
212 | }; | |
213 | }; | |
214 | ||
33398cf2 MH |
215 | /* |
216 | * The memory controller data structure. The memory controller controls both | |
217 | * page cache and RSS per cgroup. We would eventually like to provide | |
218 | * statistics based on the statistics developed by Rik Van Riel for clock-pro, | |
219 | * to help the administrator determine what knobs to tune. | |
220 | */ | |
221 | struct mem_cgroup { | |
222 | struct cgroup_subsys_state css; | |
223 | ||
73f576c0 JW |
224 | /* Private memcg ID. Used to ID objects that outlive the cgroup */ |
225 | struct mem_cgroup_id id; | |
226 | ||
33398cf2 | 227 | /* Accounted resources */ |
bd0b230f WL |
228 | struct page_counter memory; /* Both v1 & v2 */ |
229 | ||
230 | union { | |
231 | struct page_counter swap; /* v2 only */ | |
232 | struct page_counter memsw; /* v1 only */ | |
233 | }; | |
0db15298 JW |
234 | |
235 | /* Legacy consumer-oriented counters */ | |
bd0b230f WL |
236 | struct page_counter kmem; /* v1 only */ |
237 | struct page_counter tcpmem; /* v1 only */ | |
33398cf2 | 238 | |
f7e1cb6e JW |
239 | /* Range enforcement for interrupt charges */ |
240 | struct work_struct high_work; | |
241 | ||
33398cf2 MH |
242 | unsigned long soft_limit; |
243 | ||
244 | /* vmpressure notifications */ | |
245 | struct vmpressure vmpressure; | |
246 | ||
3d8b38eb RG |
247 | /* |
248 | * Should the OOM killer kill all belonging tasks, had it kill one? | |
249 | */ | |
250 | bool oom_group; | |
251 | ||
33398cf2 MH |
252 | /* protected by memcg_oom_lock */ |
253 | bool oom_lock; | |
254 | int under_oom; | |
255 | ||
256 | int swappiness; | |
257 | /* OOM-Killer disable */ | |
258 | int oom_kill_disable; | |
259 | ||
1e577f97 | 260 | /* memory.events and memory.events.local */ |
472912a2 | 261 | struct cgroup_file events_file; |
1e577f97 | 262 | struct cgroup_file events_local_file; |
472912a2 | 263 | |
f3a53a3a TH |
264 | /* handle for "memory.swap.events" */ |
265 | struct cgroup_file swap_events_file; | |
266 | ||
33398cf2 MH |
267 | /* protect arrays of thresholds */ |
268 | struct mutex thresholds_lock; | |
269 | ||
270 | /* thresholds for memory usage. RCU-protected */ | |
271 | struct mem_cgroup_thresholds thresholds; | |
272 | ||
273 | /* thresholds for mem+swap usage. RCU-protected */ | |
274 | struct mem_cgroup_thresholds memsw_thresholds; | |
275 | ||
276 | /* For oom notifier event fd */ | |
277 | struct list_head oom_notify; | |
278 | ||
279 | /* | |
280 | * Should we move charges of a task when a task is moved into this | |
281 | * mem_cgroup ? And what type of charges should we move ? | |
282 | */ | |
283 | unsigned long move_charge_at_immigrate; | |
e81bf979 AL |
284 | /* taken only while moving_account > 0 */ |
285 | spinlock_t move_lock; | |
286 | unsigned long move_lock_flags; | |
287 | ||
288 | MEMCG_PADDING(_pad1_); | |
289 | ||
871789d4 CD |
290 | atomic_long_t vmstats[MEMCG_NR_STAT]; |
291 | atomic_long_t vmevents[NR_VM_EVENT_ITEMS]; | |
42a30035 | 292 | |
815744d7 | 293 | /* memory.events */ |
42a30035 | 294 | atomic_long_t memory_events[MEMCG_NR_MEMORY_EVENTS]; |
1e577f97 | 295 | atomic_long_t memory_events_local[MEMCG_NR_MEMORY_EVENTS]; |
33398cf2 | 296 | |
d886f4e4 JW |
297 | unsigned long socket_pressure; |
298 | ||
299 | /* Legacy tcp memory accounting */ | |
0db15298 JW |
300 | bool tcpmem_active; |
301 | int tcpmem_pressure; | |
d886f4e4 | 302 | |
84c07d11 | 303 | #ifdef CONFIG_MEMCG_KMEM |
33398cf2 | 304 | int kmemcg_id; |
567e9ab2 | 305 | enum memcg_kmem_state kmem_state; |
bf4f0599 RG |
306 | struct obj_cgroup __rcu *objcg; |
307 | struct list_head objcg_list; /* list of inherited objcgs */ | |
33398cf2 MH |
308 | #endif |
309 | ||
4df91062 FT |
310 | MEMCG_PADDING(_pad2_); |
311 | ||
312 | /* | |
313 | * set > 0 if pages under this cgroup are moving to other cgroup. | |
314 | */ | |
315 | atomic_t moving_account; | |
316 | struct task_struct *move_lock_task; | |
317 | ||
318 | /* Legacy local VM stats and events */ | |
319 | struct memcg_vmstats_percpu __percpu *vmstats_local; | |
320 | ||
321 | /* Subtree VM stats and events (batched updates) */ | |
322 | struct memcg_vmstats_percpu __percpu *vmstats_percpu; | |
323 | ||
33398cf2 MH |
324 | #ifdef CONFIG_CGROUP_WRITEBACK |
325 | struct list_head cgwb_list; | |
326 | struct wb_domain cgwb_domain; | |
97b27821 | 327 | struct memcg_cgwb_frn cgwb_frn[MEMCG_CGWB_FRN_CNT]; |
33398cf2 MH |
328 | #endif |
329 | ||
330 | /* List of events which userspace want to receive */ | |
331 | struct list_head event_list; | |
332 | spinlock_t event_list_lock; | |
333 | ||
87eaceb3 YS |
334 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
335 | struct deferred_split deferred_split_queue; | |
336 | #endif | |
337 | ||
33398cf2 MH |
338 | struct mem_cgroup_per_node *nodeinfo[0]; |
339 | /* WARNING: nodeinfo must be the last member here */ | |
340 | }; | |
7d828602 | 341 | |
a983b5eb JW |
342 | /* |
343 | * size of first charge trial. "32" comes from vmscan.c's magic value. | |
344 | * TODO: maybe necessary to use big numbers in big irons. | |
345 | */ | |
346 | #define MEMCG_CHARGE_BATCH 32U | |
347 | ||
7d828602 | 348 | extern struct mem_cgroup *root_mem_cgroup; |
56161634 | 349 | |
87944e29 RG |
350 | enum page_memcg_data_flags { |
351 | /* page->memcg_data is a pointer to an objcgs vector */ | |
352 | MEMCG_DATA_OBJCGS = (1UL << 0), | |
18b2db3b RG |
353 | /* page has been accounted as a non-slab kernel page */ |
354 | MEMCG_DATA_KMEM = (1UL << 1), | |
87944e29 | 355 | /* the next bit after the last actual flag */ |
18b2db3b | 356 | __NR_MEMCG_DATA_FLAGS = (1UL << 2), |
87944e29 RG |
357 | }; |
358 | ||
359 | #define MEMCG_DATA_FLAGS_MASK (__NR_MEMCG_DATA_FLAGS - 1) | |
360 | ||
bcfe06bf RG |
361 | /* |
362 | * page_memcg - get the memory cgroup associated with a page | |
363 | * @page: a pointer to the page struct | |
364 | * | |
365 | * Returns a pointer to the memory cgroup associated with the page, | |
366 | * or NULL. This function assumes that the page is known to have a | |
367 | * proper memory cgroup pointer. It's not safe to call this function | |
368 | * against some type of pages, e.g. slab pages or ex-slab pages. | |
369 | * | |
370 | * Any of the following ensures page and memcg binding stability: | |
371 | * - the page lock | |
372 | * - LRU isolation | |
373 | * - lock_page_memcg() | |
374 | * - exclusive reference | |
375 | */ | |
376 | static inline struct mem_cgroup *page_memcg(struct page *page) | |
377 | { | |
18b2db3b RG |
378 | unsigned long memcg_data = page->memcg_data; |
379 | ||
bcfe06bf | 380 | VM_BUG_ON_PAGE(PageSlab(page), page); |
18b2db3b RG |
381 | VM_BUG_ON_PAGE(memcg_data & MEMCG_DATA_OBJCGS, page); |
382 | ||
383 | return (struct mem_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); | |
bcfe06bf RG |
384 | } |
385 | ||
386 | /* | |
387 | * page_memcg_rcu - locklessly get the memory cgroup associated with a page | |
388 | * @page: a pointer to the page struct | |
389 | * | |
390 | * Returns a pointer to the memory cgroup associated with the page, | |
391 | * or NULL. This function assumes that the page is known to have a | |
392 | * proper memory cgroup pointer. It's not safe to call this function | |
393 | * against some type of pages, e.g. slab pages or ex-slab pages. | |
394 | */ | |
395 | static inline struct mem_cgroup *page_memcg_rcu(struct page *page) | |
396 | { | |
397 | VM_BUG_ON_PAGE(PageSlab(page), page); | |
398 | WARN_ON_ONCE(!rcu_read_lock_held()); | |
399 | ||
18b2db3b RG |
400 | return (struct mem_cgroup *)(READ_ONCE(page->memcg_data) & |
401 | ~MEMCG_DATA_FLAGS_MASK); | |
bcfe06bf RG |
402 | } |
403 | ||
404 | /* | |
405 | * page_memcg_check - get the memory cgroup associated with a page | |
406 | * @page: a pointer to the page struct | |
407 | * | |
408 | * Returns a pointer to the memory cgroup associated with the page, | |
409 | * or NULL. This function unlike page_memcg() can take any page | |
410 | * as an argument. It has to be used in cases when it's not known if a page | |
411 | * has an associated memory cgroup pointer or an object cgroups vector. | |
412 | * | |
413 | * Any of the following ensures page and memcg binding stability: | |
414 | * - the page lock | |
415 | * - LRU isolation | |
416 | * - lock_page_memcg() | |
417 | * - exclusive reference | |
418 | */ | |
419 | static inline struct mem_cgroup *page_memcg_check(struct page *page) | |
420 | { | |
421 | /* | |
422 | * Because page->memcg_data might be changed asynchronously | |
423 | * for slab pages, READ_ONCE() should be used here. | |
424 | */ | |
425 | unsigned long memcg_data = READ_ONCE(page->memcg_data); | |
426 | ||
87944e29 | 427 | if (memcg_data & MEMCG_DATA_OBJCGS) |
bcfe06bf RG |
428 | return NULL; |
429 | ||
18b2db3b RG |
430 | return (struct mem_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); |
431 | } | |
432 | ||
433 | /* | |
434 | * PageMemcgKmem - check if the page has MemcgKmem flag set | |
435 | * @page: a pointer to the page struct | |
436 | * | |
437 | * Checks if the page has MemcgKmem flag set. The caller must ensure that | |
438 | * the page has an associated memory cgroup. It's not safe to call this function | |
439 | * against some types of pages, e.g. slab pages. | |
440 | */ | |
441 | static inline bool PageMemcgKmem(struct page *page) | |
442 | { | |
443 | VM_BUG_ON_PAGE(page->memcg_data & MEMCG_DATA_OBJCGS, page); | |
444 | return page->memcg_data & MEMCG_DATA_KMEM; | |
bcfe06bf RG |
445 | } |
446 | ||
270c6a71 RG |
447 | #ifdef CONFIG_MEMCG_KMEM |
448 | /* | |
449 | * page_objcgs - get the object cgroups vector associated with a page | |
450 | * @page: a pointer to the page struct | |
451 | * | |
452 | * Returns a pointer to the object cgroups vector associated with the page, | |
453 | * or NULL. This function assumes that the page is known to have an | |
454 | * associated object cgroups vector. It's not safe to call this function | |
455 | * against pages, which might have an associated memory cgroup: e.g. | |
456 | * kernel stack pages. | |
457 | */ | |
458 | static inline struct obj_cgroup **page_objcgs(struct page *page) | |
459 | { | |
87944e29 RG |
460 | unsigned long memcg_data = READ_ONCE(page->memcg_data); |
461 | ||
462 | VM_BUG_ON_PAGE(memcg_data && !(memcg_data & MEMCG_DATA_OBJCGS), page); | |
18b2db3b | 463 | VM_BUG_ON_PAGE(memcg_data & MEMCG_DATA_KMEM, page); |
87944e29 RG |
464 | |
465 | return (struct obj_cgroup **)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); | |
270c6a71 RG |
466 | } |
467 | ||
468 | /* | |
469 | * page_objcgs_check - get the object cgroups vector associated with a page | |
470 | * @page: a pointer to the page struct | |
471 | * | |
472 | * Returns a pointer to the object cgroups vector associated with the page, | |
473 | * or NULL. This function is safe to use if the page can be directly associated | |
474 | * with a memory cgroup. | |
475 | */ | |
476 | static inline struct obj_cgroup **page_objcgs_check(struct page *page) | |
477 | { | |
478 | unsigned long memcg_data = READ_ONCE(page->memcg_data); | |
479 | ||
87944e29 RG |
480 | if (!memcg_data || !(memcg_data & MEMCG_DATA_OBJCGS)) |
481 | return NULL; | |
270c6a71 | 482 | |
18b2db3b RG |
483 | VM_BUG_ON_PAGE(memcg_data & MEMCG_DATA_KMEM, page); |
484 | ||
87944e29 | 485 | return (struct obj_cgroup **)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); |
270c6a71 RG |
486 | } |
487 | ||
270c6a71 RG |
488 | #else |
489 | static inline struct obj_cgroup **page_objcgs(struct page *page) | |
490 | { | |
491 | return NULL; | |
492 | } | |
493 | ||
494 | static inline struct obj_cgroup **page_objcgs_check(struct page *page) | |
495 | { | |
496 | return NULL; | |
497 | } | |
270c6a71 RG |
498 | #endif |
499 | ||
772616b0 RG |
500 | static __always_inline bool memcg_stat_item_in_bytes(int idx) |
501 | { | |
502 | if (idx == MEMCG_PERCPU_B) | |
503 | return true; | |
504 | return vmstat_item_in_bytes(idx); | |
505 | } | |
506 | ||
dfd2f10c KT |
507 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
508 | { | |
509 | return (memcg == root_mem_cgroup); | |
510 | } | |
511 | ||
23047a96 JW |
512 | static inline bool mem_cgroup_disabled(void) |
513 | { | |
514 | return !cgroup_subsys_enabled(memory_cgrp_subsys); | |
515 | } | |
516 | ||
22f7496f YS |
517 | static inline unsigned long mem_cgroup_protection(struct mem_cgroup *root, |
518 | struct mem_cgroup *memcg, | |
1bc63fb1 | 519 | bool in_low_reclaim) |
9783aa99 | 520 | { |
1bc63fb1 CD |
521 | if (mem_cgroup_disabled()) |
522 | return 0; | |
523 | ||
22f7496f YS |
524 | /* |
525 | * There is no reclaim protection applied to a targeted reclaim. | |
526 | * We are special casing this specific case here because | |
527 | * mem_cgroup_protected calculation is not robust enough to keep | |
528 | * the protection invariant for calculated effective values for | |
529 | * parallel reclaimers with different reclaim target. This is | |
530 | * especially a problem for tail memcgs (as they have pages on LRU) | |
531 | * which would want to have effective values 0 for targeted reclaim | |
532 | * but a different value for external reclaim. | |
533 | * | |
534 | * Example | |
535 | * Let's have global and A's reclaim in parallel: | |
536 | * | | |
537 | * A (low=2G, usage = 3G, max = 3G, children_low_usage = 1.5G) | |
538 | * |\ | |
539 | * | C (low = 1G, usage = 2.5G) | |
540 | * B (low = 1G, usage = 0.5G) | |
541 | * | |
542 | * For the global reclaim | |
543 | * A.elow = A.low | |
544 | * B.elow = min(B.usage, B.low) because children_low_usage <= A.elow | |
545 | * C.elow = min(C.usage, C.low) | |
546 | * | |
547 | * With the effective values resetting we have A reclaim | |
548 | * A.elow = 0 | |
549 | * B.elow = B.low | |
550 | * C.elow = C.low | |
551 | * | |
552 | * If the global reclaim races with A's reclaim then | |
553 | * B.elow = C.elow = 0 because children_low_usage > A.elow) | |
554 | * is possible and reclaiming B would be violating the protection. | |
555 | * | |
556 | */ | |
557 | if (root == memcg) | |
558 | return 0; | |
559 | ||
1bc63fb1 CD |
560 | if (in_low_reclaim) |
561 | return READ_ONCE(memcg->memory.emin); | |
9783aa99 | 562 | |
1bc63fb1 CD |
563 | return max(READ_ONCE(memcg->memory.emin), |
564 | READ_ONCE(memcg->memory.elow)); | |
9783aa99 CD |
565 | } |
566 | ||
45c7f7e1 CD |
567 | void mem_cgroup_calculate_protection(struct mem_cgroup *root, |
568 | struct mem_cgroup *memcg); | |
569 | ||
570 | static inline bool mem_cgroup_supports_protection(struct mem_cgroup *memcg) | |
571 | { | |
572 | /* | |
573 | * The root memcg doesn't account charges, and doesn't support | |
574 | * protection. | |
575 | */ | |
576 | return !mem_cgroup_disabled() && !mem_cgroup_is_root(memcg); | |
577 | ||
578 | } | |
579 | ||
580 | static inline bool mem_cgroup_below_low(struct mem_cgroup *memcg) | |
581 | { | |
582 | if (!mem_cgroup_supports_protection(memcg)) | |
583 | return false; | |
584 | ||
585 | return READ_ONCE(memcg->memory.elow) >= | |
586 | page_counter_read(&memcg->memory); | |
587 | } | |
588 | ||
589 | static inline bool mem_cgroup_below_min(struct mem_cgroup *memcg) | |
590 | { | |
591 | if (!mem_cgroup_supports_protection(memcg)) | |
592 | return false; | |
593 | ||
594 | return READ_ONCE(memcg->memory.emin) >= | |
595 | page_counter_read(&memcg->memory); | |
596 | } | |
241994ed | 597 | |
d9eb1ea2 | 598 | int mem_cgroup_charge(struct page *page, struct mm_struct *mm, gfp_t gfp_mask); |
3fea5a49 | 599 | |
0a31bc97 | 600 | void mem_cgroup_uncharge(struct page *page); |
747db954 | 601 | void mem_cgroup_uncharge_list(struct list_head *page_list); |
569b846d | 602 | |
6a93ca8f | 603 | void mem_cgroup_migrate(struct page *oldpage, struct page *newpage); |
569b846d | 604 | |
55779ec7 | 605 | /** |
867e5e1d | 606 | * mem_cgroup_lruvec - get the lru list vector for a memcg & node |
55779ec7 | 607 | * @memcg: memcg of the wanted lruvec |
9a1ac228 | 608 | * @pgdat: pglist_data |
55779ec7 | 609 | * |
867e5e1d | 610 | * Returns the lru list vector holding pages for a given @memcg & |
9a1ac228 | 611 | * @pgdat combination. This can be the node lruvec, if the memory |
867e5e1d | 612 | * controller is disabled. |
55779ec7 | 613 | */ |
867e5e1d JW |
614 | static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg, |
615 | struct pglist_data *pgdat) | |
55779ec7 | 616 | { |
ef8f2327 | 617 | struct mem_cgroup_per_node *mz; |
55779ec7 JW |
618 | struct lruvec *lruvec; |
619 | ||
620 | if (mem_cgroup_disabled()) { | |
867e5e1d | 621 | lruvec = &pgdat->__lruvec; |
55779ec7 JW |
622 | goto out; |
623 | } | |
624 | ||
1b05117d JW |
625 | if (!memcg) |
626 | memcg = root_mem_cgroup; | |
627 | ||
a3747b53 | 628 | mz = memcg->nodeinfo[pgdat->node_id]; |
55779ec7 JW |
629 | lruvec = &mz->lruvec; |
630 | out: | |
631 | /* | |
632 | * Since a node can be onlined after the mem_cgroup was created, | |
599d0c95 | 633 | * we have to be prepared to initialize lruvec->pgdat here; |
55779ec7 JW |
634 | * and if offlined then reonlined, we need to reinitialize it. |
635 | */ | |
ef8f2327 MG |
636 | if (unlikely(lruvec->pgdat != pgdat)) |
637 | lruvec->pgdat = pgdat; | |
55779ec7 JW |
638 | return lruvec; |
639 | } | |
640 | ||
9a1ac228 HS |
641 | /** |
642 | * mem_cgroup_page_lruvec - return lruvec for isolating/putting an LRU page | |
643 | * @page: the page | |
644 | * @pgdat: pgdat of the page | |
645 | * | |
646 | * This function relies on page->mem_cgroup being stable. | |
647 | */ | |
648 | static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, | |
649 | struct pglist_data *pgdat) | |
650 | { | |
651 | struct mem_cgroup *memcg = page_memcg(page); | |
652 | ||
7ea510b9 | 653 | VM_WARN_ON_ONCE_PAGE(!memcg && !mem_cgroup_disabled(), page); |
9a1ac228 HS |
654 | return mem_cgroup_lruvec(memcg, pgdat); |
655 | } | |
c9b0ed51 | 656 | |
2a5e4e34 AD |
657 | static inline bool lruvec_holds_page_lru_lock(struct page *page, |
658 | struct lruvec *lruvec) | |
659 | { | |
660 | pg_data_t *pgdat = page_pgdat(page); | |
661 | const struct mem_cgroup *memcg; | |
662 | struct mem_cgroup_per_node *mz; | |
663 | ||
664 | if (mem_cgroup_disabled()) | |
665 | return lruvec == &pgdat->__lruvec; | |
666 | ||
667 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
668 | memcg = page_memcg(page) ? : root_mem_cgroup; | |
669 | ||
670 | return lruvec->pgdat == pgdat && mz->memcg == memcg; | |
671 | } | |
672 | ||
64219994 | 673 | struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
e993d905 | 674 | |
d46eb14b SB |
675 | struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm); |
676 | ||
6168d0da AS |
677 | struct lruvec *lock_page_lruvec(struct page *page); |
678 | struct lruvec *lock_page_lruvec_irq(struct page *page); | |
679 | struct lruvec *lock_page_lruvec_irqsave(struct page *page, | |
680 | unsigned long *flags); | |
681 | ||
682 | #ifdef CONFIG_DEBUG_VM | |
683 | void lruvec_memcg_debug(struct lruvec *lruvec, struct page *page); | |
684 | #else | |
685 | static inline void lruvec_memcg_debug(struct lruvec *lruvec, struct page *page) | |
686 | { | |
687 | } | |
688 | #endif | |
689 | ||
33398cf2 MH |
690 | static inline |
691 | struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){ | |
692 | return css ? container_of(css, struct mem_cgroup, css) : NULL; | |
693 | } | |
694 | ||
bf4f0599 RG |
695 | static inline bool obj_cgroup_tryget(struct obj_cgroup *objcg) |
696 | { | |
697 | return percpu_ref_tryget(&objcg->refcnt); | |
698 | } | |
699 | ||
700 | static inline void obj_cgroup_get(struct obj_cgroup *objcg) | |
701 | { | |
702 | percpu_ref_get(&objcg->refcnt); | |
703 | } | |
704 | ||
705 | static inline void obj_cgroup_put(struct obj_cgroup *objcg) | |
706 | { | |
707 | percpu_ref_put(&objcg->refcnt); | |
708 | } | |
709 | ||
710 | /* | |
711 | * After the initialization objcg->memcg is always pointing at | |
712 | * a valid memcg, but can be atomically swapped to the parent memcg. | |
713 | * | |
714 | * The caller must ensure that the returned memcg won't be released: | |
715 | * e.g. acquire the rcu_read_lock or css_set_lock. | |
716 | */ | |
717 | static inline struct mem_cgroup *obj_cgroup_memcg(struct obj_cgroup *objcg) | |
718 | { | |
719 | return READ_ONCE(objcg->memcg); | |
720 | } | |
721 | ||
dc0b5864 RG |
722 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
723 | { | |
d46eb14b SB |
724 | if (memcg) |
725 | css_put(&memcg->css); | |
dc0b5864 RG |
726 | } |
727 | ||
8e8ae645 JW |
728 | #define mem_cgroup_from_counter(counter, member) \ |
729 | container_of(counter, struct mem_cgroup, member) | |
730 | ||
33398cf2 MH |
731 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
732 | struct mem_cgroup *, | |
733 | struct mem_cgroup_reclaim_cookie *); | |
734 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); | |
7c5f64f8 VD |
735 | int mem_cgroup_scan_tasks(struct mem_cgroup *, |
736 | int (*)(struct task_struct *, void *), void *); | |
33398cf2 | 737 | |
23047a96 JW |
738 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
739 | { | |
740 | if (mem_cgroup_disabled()) | |
741 | return 0; | |
742 | ||
73f576c0 | 743 | return memcg->id.id; |
23047a96 | 744 | } |
73f576c0 | 745 | struct mem_cgroup *mem_cgroup_from_id(unsigned short id); |
23047a96 | 746 | |
aa9694bb CD |
747 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
748 | { | |
749 | return mem_cgroup_from_css(seq_css(m)); | |
750 | } | |
751 | ||
2262185c RG |
752 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
753 | { | |
754 | struct mem_cgroup_per_node *mz; | |
755 | ||
756 | if (mem_cgroup_disabled()) | |
757 | return NULL; | |
758 | ||
759 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
760 | return mz->memcg; | |
761 | } | |
762 | ||
8e8ae645 JW |
763 | /** |
764 | * parent_mem_cgroup - find the accounting parent of a memcg | |
765 | * @memcg: memcg whose parent to find | |
766 | * | |
767 | * Returns the parent memcg, or NULL if this is the root or the memory | |
768 | * controller is in legacy no-hierarchy mode. | |
769 | */ | |
770 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) | |
771 | { | |
772 | if (!memcg->memory.parent) | |
773 | return NULL; | |
774 | return mem_cgroup_from_counter(memcg->memory.parent, memory); | |
775 | } | |
776 | ||
33398cf2 MH |
777 | static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, |
778 | struct mem_cgroup *root) | |
779 | { | |
780 | if (root == memcg) | |
781 | return true; | |
33398cf2 MH |
782 | return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup); |
783 | } | |
e1aab161 | 784 | |
2314b42d JW |
785 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
786 | struct mem_cgroup *memcg) | |
2e4d4091 | 787 | { |
587af308 | 788 | struct mem_cgroup *task_memcg; |
413918bb | 789 | bool match = false; |
c3ac9a8a | 790 | |
2e4d4091 | 791 | rcu_read_lock(); |
587af308 | 792 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
413918bb | 793 | if (task_memcg) |
2314b42d | 794 | match = mem_cgroup_is_descendant(task_memcg, memcg); |
2e4d4091 | 795 | rcu_read_unlock(); |
c3ac9a8a | 796 | return match; |
2e4d4091 | 797 | } |
8a9f3ccd | 798 | |
64219994 | 799 | struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page); |
2fc04524 | 800 | ino_t page_cgroup_ino(struct page *page); |
d324236b | 801 | |
eb01aaab VD |
802 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
803 | { | |
804 | if (mem_cgroup_disabled()) | |
805 | return true; | |
806 | return !!(memcg->css.flags & CSS_ONLINE); | |
807 | } | |
808 | ||
58ae83db KH |
809 | /* |
810 | * For memory reclaim. | |
811 | */ | |
889976db | 812 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
33398cf2 MH |
813 | |
814 | void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, | |
b4536f0c | 815 | int zid, int nr_pages); |
33398cf2 | 816 | |
b4536f0c MH |
817 | static inline |
818 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
819 | enum lru_list lru, int zone_idx) | |
820 | { | |
821 | struct mem_cgroup_per_node *mz; | |
822 | ||
823 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
e0e3f42f | 824 | return READ_ONCE(mz->lru_zone_size[zone_idx][lru]); |
33398cf2 MH |
825 | } |
826 | ||
b23afb93 TH |
827 | void mem_cgroup_handle_over_high(void); |
828 | ||
bbec2e15 | 829 | unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg); |
7c5f64f8 | 830 | |
9783aa99 CD |
831 | unsigned long mem_cgroup_size(struct mem_cgroup *memcg); |
832 | ||
f0c867d9 | 833 | void mem_cgroup_print_oom_context(struct mem_cgroup *memcg, |
64219994 | 834 | struct task_struct *p); |
58ae83db | 835 | |
f0c867d9 | 836 | void mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg); |
837 | ||
29ef680a | 838 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 | 839 | { |
29ef680a MH |
840 | WARN_ON(current->in_user_fault); |
841 | current->in_user_fault = 1; | |
519e5247 JW |
842 | } |
843 | ||
29ef680a | 844 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 | 845 | { |
29ef680a MH |
846 | WARN_ON(!current->in_user_fault); |
847 | current->in_user_fault = 0; | |
519e5247 JW |
848 | } |
849 | ||
3812c8c8 JW |
850 | static inline bool task_in_memcg_oom(struct task_struct *p) |
851 | { | |
626ebc41 | 852 | return p->memcg_in_oom; |
3812c8c8 JW |
853 | } |
854 | ||
49426420 | 855 | bool mem_cgroup_oom_synchronize(bool wait); |
3d8b38eb RG |
856 | struct mem_cgroup *mem_cgroup_get_oom_group(struct task_struct *victim, |
857 | struct mem_cgroup *oom_domain); | |
858 | void mem_cgroup_print_oom_group(struct mem_cgroup *memcg); | |
3812c8c8 | 859 | |
c255a458 | 860 | #ifdef CONFIG_MEMCG_SWAP |
eccb52e7 | 861 | extern bool cgroup_memory_noswap; |
c077719b | 862 | #endif |
f8d66542 | 863 | |
1c824a68 | 864 | void lock_page_memcg(struct page *page); |
62cccb8c | 865 | void unlock_page_memcg(struct page *page); |
d7365e78 | 866 | |
db9adbcb | 867 | void __mod_memcg_state(struct mem_cgroup *memcg, int idx, int val); |
2a2e4885 | 868 | |
04fecbf5 | 869 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 870 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 871 | int idx, int val) |
2a2e4885 | 872 | { |
c3cc3911 JW |
873 | unsigned long flags; |
874 | ||
875 | local_irq_save(flags); | |
a983b5eb | 876 | __mod_memcg_state(memcg, idx, val); |
c3cc3911 | 877 | local_irq_restore(flags); |
2a2e4885 JW |
878 | } |
879 | ||
42a30035 JW |
880 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
881 | enum node_stat_item idx) | |
882 | { | |
883 | struct mem_cgroup_per_node *pn; | |
884 | long x; | |
885 | ||
886 | if (mem_cgroup_disabled()) | |
887 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
888 | ||
889 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
890 | x = atomic_long_read(&pn->lruvec_stat[idx]); | |
891 | #ifdef CONFIG_SMP | |
892 | if (x < 0) | |
893 | x = 0; | |
894 | #endif | |
895 | return x; | |
896 | } | |
897 | ||
205b20cc JW |
898 | static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
899 | enum node_stat_item idx) | |
2a7106f2 | 900 | { |
00f3ca2c | 901 | struct mem_cgroup_per_node *pn; |
815744d7 JW |
902 | long x = 0; |
903 | int cpu; | |
00f3ca2c JW |
904 | |
905 | if (mem_cgroup_disabled()) | |
906 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
907 | ||
908 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
815744d7 JW |
909 | for_each_possible_cpu(cpu) |
910 | x += per_cpu(pn->lruvec_stat_local->count[idx], cpu); | |
a983b5eb JW |
911 | #ifdef CONFIG_SMP |
912 | if (x < 0) | |
913 | x = 0; | |
914 | #endif | |
915 | return x; | |
2a7106f2 GT |
916 | } |
917 | ||
eedc4e5a RG |
918 | void __mod_memcg_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx, |
919 | int val); | |
da3ceeff | 920 | void __mod_lruvec_kmem_state(void *p, enum node_stat_item idx, int val); |
991e7673 | 921 | |
da3ceeff | 922 | static inline void mod_lruvec_kmem_state(void *p, enum node_stat_item idx, |
991e7673 SB |
923 | int val) |
924 | { | |
925 | unsigned long flags; | |
926 | ||
927 | local_irq_save(flags); | |
da3ceeff | 928 | __mod_lruvec_kmem_state(p, idx, val); |
991e7673 SB |
929 | local_irq_restore(flags); |
930 | } | |
931 | ||
eedc4e5a RG |
932 | static inline void mod_memcg_lruvec_state(struct lruvec *lruvec, |
933 | enum node_stat_item idx, int val) | |
934 | { | |
935 | unsigned long flags; | |
936 | ||
937 | local_irq_save(flags); | |
938 | __mod_memcg_lruvec_state(lruvec, idx, val); | |
939 | local_irq_restore(flags); | |
940 | } | |
941 | ||
ef8f2327 | 942 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
943 | gfp_t gfp_mask, |
944 | unsigned long *total_scanned); | |
a63d83f4 | 945 | |
db9adbcb JW |
946 | void __count_memcg_events(struct mem_cgroup *memcg, enum vm_event_item idx, |
947 | unsigned long count); | |
c9019e9b | 948 | |
2262185c | 949 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
e27be240 JW |
950 | enum vm_event_item idx, |
951 | unsigned long count) | |
2262185c | 952 | { |
c3cc3911 JW |
953 | unsigned long flags; |
954 | ||
955 | local_irq_save(flags); | |
a983b5eb | 956 | __count_memcg_events(memcg, idx, count); |
c3cc3911 | 957 | local_irq_restore(flags); |
2262185c RG |
958 | } |
959 | ||
960 | static inline void count_memcg_page_event(struct page *page, | |
e27be240 | 961 | enum vm_event_item idx) |
2262185c | 962 | { |
bcfe06bf RG |
963 | struct mem_cgroup *memcg = page_memcg(page); |
964 | ||
965 | if (memcg) | |
966 | count_memcg_events(memcg, idx, 1); | |
2262185c RG |
967 | } |
968 | ||
969 | static inline void count_memcg_event_mm(struct mm_struct *mm, | |
970 | enum vm_event_item idx) | |
68ae564b | 971 | { |
33398cf2 MH |
972 | struct mem_cgroup *memcg; |
973 | ||
68ae564b DR |
974 | if (mem_cgroup_disabled()) |
975 | return; | |
33398cf2 MH |
976 | |
977 | rcu_read_lock(); | |
978 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
fe6bdfc8 | 979 | if (likely(memcg)) |
c9019e9b | 980 | count_memcg_events(memcg, idx, 1); |
33398cf2 | 981 | rcu_read_unlock(); |
68ae564b | 982 | } |
c9019e9b | 983 | |
e27be240 JW |
984 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
985 | enum memcg_memory_event event) | |
c9019e9b | 986 | { |
8b21ca02 MS |
987 | bool swap_event = event == MEMCG_SWAP_HIGH || event == MEMCG_SWAP_MAX || |
988 | event == MEMCG_SWAP_FAIL; | |
989 | ||
1e577f97 | 990 | atomic_long_inc(&memcg->memory_events_local[event]); |
8b21ca02 MS |
991 | if (!swap_event) |
992 | cgroup_file_notify(&memcg->events_local_file); | |
1e577f97 | 993 | |
9852ae3f CD |
994 | do { |
995 | atomic_long_inc(&memcg->memory_events[event]); | |
8b21ca02 MS |
996 | if (swap_event) |
997 | cgroup_file_notify(&memcg->swap_events_file); | |
998 | else | |
999 | cgroup_file_notify(&memcg->events_file); | |
9852ae3f | 1000 | |
04fd61a4 YS |
1001 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys)) |
1002 | break; | |
9852ae3f CD |
1003 | if (cgrp_dfl_root.flags & CGRP_ROOT_MEMORY_LOCAL_EVENTS) |
1004 | break; | |
1005 | } while ((memcg = parent_mem_cgroup(memcg)) && | |
1006 | !mem_cgroup_is_root(memcg)); | |
c9019e9b JW |
1007 | } |
1008 | ||
fe6bdfc8 RG |
1009 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
1010 | enum memcg_memory_event event) | |
1011 | { | |
1012 | struct mem_cgroup *memcg; | |
1013 | ||
1014 | if (mem_cgroup_disabled()) | |
1015 | return; | |
1016 | ||
1017 | rcu_read_lock(); | |
1018 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
1019 | if (likely(memcg)) | |
1020 | memcg_memory_event(memcg, event); | |
1021 | rcu_read_unlock(); | |
1022 | } | |
1023 | ||
be6c8982 | 1024 | void split_page_memcg(struct page *head, unsigned int nr); |
ca3e0214 | 1025 | |
c255a458 | 1026 | #else /* CONFIG_MEMCG */ |
23047a96 JW |
1027 | |
1028 | #define MEM_CGROUP_ID_SHIFT 0 | |
1029 | #define MEM_CGROUP_ID_MAX 0 | |
1030 | ||
7a81b88c KH |
1031 | struct mem_cgroup; |
1032 | ||
bcfe06bf RG |
1033 | static inline struct mem_cgroup *page_memcg(struct page *page) |
1034 | { | |
1035 | return NULL; | |
1036 | } | |
1037 | ||
1038 | static inline struct mem_cgroup *page_memcg_rcu(struct page *page) | |
1039 | { | |
1040 | WARN_ON_ONCE(!rcu_read_lock_held()); | |
1041 | return NULL; | |
1042 | } | |
1043 | ||
1044 | static inline struct mem_cgroup *page_memcg_check(struct page *page) | |
1045 | { | |
1046 | return NULL; | |
1047 | } | |
1048 | ||
18b2db3b RG |
1049 | static inline bool PageMemcgKmem(struct page *page) |
1050 | { | |
1051 | return false; | |
1052 | } | |
1053 | ||
dfd2f10c KT |
1054 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
1055 | { | |
1056 | return true; | |
1057 | } | |
1058 | ||
23047a96 JW |
1059 | static inline bool mem_cgroup_disabled(void) |
1060 | { | |
1061 | return true; | |
1062 | } | |
1063 | ||
e27be240 JW |
1064 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
1065 | enum memcg_memory_event event) | |
241994ed JW |
1066 | { |
1067 | } | |
1068 | ||
fe6bdfc8 RG |
1069 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
1070 | enum memcg_memory_event event) | |
1071 | { | |
1072 | } | |
1073 | ||
22f7496f YS |
1074 | static inline unsigned long mem_cgroup_protection(struct mem_cgroup *root, |
1075 | struct mem_cgroup *memcg, | |
1bc63fb1 | 1076 | bool in_low_reclaim) |
9783aa99 | 1077 | { |
1bc63fb1 | 1078 | return 0; |
9783aa99 CD |
1079 | } |
1080 | ||
45c7f7e1 CD |
1081 | static inline void mem_cgroup_calculate_protection(struct mem_cgroup *root, |
1082 | struct mem_cgroup *memcg) | |
1083 | { | |
1084 | } | |
1085 | ||
1086 | static inline bool mem_cgroup_below_low(struct mem_cgroup *memcg) | |
1087 | { | |
1088 | return false; | |
1089 | } | |
1090 | ||
1091 | static inline bool mem_cgroup_below_min(struct mem_cgroup *memcg) | |
241994ed | 1092 | { |
45c7f7e1 | 1093 | return false; |
241994ed JW |
1094 | } |
1095 | ||
3fea5a49 | 1096 | static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm, |
d9eb1ea2 | 1097 | gfp_t gfp_mask) |
3fea5a49 JW |
1098 | { |
1099 | return 0; | |
1100 | } | |
1101 | ||
0a31bc97 | 1102 | static inline void mem_cgroup_uncharge(struct page *page) |
569b846d KH |
1103 | { |
1104 | } | |
1105 | ||
747db954 | 1106 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
8a9f3ccd BS |
1107 | { |
1108 | } | |
1109 | ||
6a93ca8f | 1110 | static inline void mem_cgroup_migrate(struct page *old, struct page *new) |
69029cd5 KH |
1111 | { |
1112 | } | |
1113 | ||
867e5e1d JW |
1114 | static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg, |
1115 | struct pglist_data *pgdat) | |
08e552c6 | 1116 | { |
867e5e1d | 1117 | return &pgdat->__lruvec; |
08e552c6 KH |
1118 | } |
1119 | ||
fa9add64 | 1120 | static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, |
599d0c95 | 1121 | struct pglist_data *pgdat) |
66e1707b | 1122 | { |
867e5e1d | 1123 | return &pgdat->__lruvec; |
66e1707b BS |
1124 | } |
1125 | ||
2a5e4e34 AD |
1126 | static inline bool lruvec_holds_page_lru_lock(struct page *page, |
1127 | struct lruvec *lruvec) | |
1128 | { | |
1129 | pg_data_t *pgdat = page_pgdat(page); | |
1130 | ||
1131 | return lruvec == &pgdat->__lruvec; | |
1132 | } | |
1133 | ||
b910718a JW |
1134 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) |
1135 | { | |
1136 | return NULL; | |
1137 | } | |
1138 | ||
587af308 | 1139 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
c0ff4b85 | 1140 | struct mem_cgroup *memcg) |
bed7161a | 1141 | { |
587af308 | 1142 | return true; |
bed7161a BS |
1143 | } |
1144 | ||
d46eb14b SB |
1145 | static inline struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm) |
1146 | { | |
1147 | return NULL; | |
1148 | } | |
1149 | ||
dc0b5864 RG |
1150 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
1151 | { | |
1152 | } | |
1153 | ||
6168d0da AS |
1154 | static inline struct lruvec *lock_page_lruvec(struct page *page) |
1155 | { | |
1156 | struct pglist_data *pgdat = page_pgdat(page); | |
1157 | ||
1158 | spin_lock(&pgdat->__lruvec.lru_lock); | |
1159 | return &pgdat->__lruvec; | |
1160 | } | |
1161 | ||
1162 | static inline struct lruvec *lock_page_lruvec_irq(struct page *page) | |
1163 | { | |
1164 | struct pglist_data *pgdat = page_pgdat(page); | |
1165 | ||
1166 | spin_lock_irq(&pgdat->__lruvec.lru_lock); | |
1167 | return &pgdat->__lruvec; | |
1168 | } | |
1169 | ||
1170 | static inline struct lruvec *lock_page_lruvec_irqsave(struct page *page, | |
1171 | unsigned long *flagsp) | |
1172 | { | |
1173 | struct pglist_data *pgdat = page_pgdat(page); | |
1174 | ||
1175 | spin_lock_irqsave(&pgdat->__lruvec.lru_lock, *flagsp); | |
1176 | return &pgdat->__lruvec; | |
1177 | } | |
1178 | ||
5660048c JW |
1179 | static inline struct mem_cgroup * |
1180 | mem_cgroup_iter(struct mem_cgroup *root, | |
1181 | struct mem_cgroup *prev, | |
1182 | struct mem_cgroup_reclaim_cookie *reclaim) | |
1183 | { | |
1184 | return NULL; | |
1185 | } | |
1186 | ||
1187 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
1188 | struct mem_cgroup *prev) | |
1189 | { | |
1190 | } | |
1191 | ||
7c5f64f8 VD |
1192 | static inline int mem_cgroup_scan_tasks(struct mem_cgroup *memcg, |
1193 | int (*fn)(struct task_struct *, void *), void *arg) | |
1194 | { | |
1195 | return 0; | |
1196 | } | |
1197 | ||
23047a96 | 1198 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
f8d66542 | 1199 | { |
23047a96 JW |
1200 | return 0; |
1201 | } | |
1202 | ||
1203 | static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id) | |
1204 | { | |
1205 | WARN_ON_ONCE(id); | |
1206 | /* XXX: This should always return root_mem_cgroup */ | |
1207 | return NULL; | |
f8d66542 | 1208 | } |
a636b327 | 1209 | |
aa9694bb CD |
1210 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
1211 | { | |
1212 | return NULL; | |
1213 | } | |
1214 | ||
2262185c RG |
1215 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
1216 | { | |
1217 | return NULL; | |
1218 | } | |
1219 | ||
eb01aaab | 1220 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
14797e23 | 1221 | { |
13308ca9 | 1222 | return true; |
14797e23 KM |
1223 | } |
1224 | ||
b4536f0c MH |
1225 | static inline |
1226 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
1227 | enum lru_list lru, int zone_idx) | |
1228 | { | |
1229 | return 0; | |
1230 | } | |
a3d8e054 | 1231 | |
bbec2e15 | 1232 | static inline unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg) |
7c5f64f8 VD |
1233 | { |
1234 | return 0; | |
1235 | } | |
1236 | ||
9783aa99 CD |
1237 | static inline unsigned long mem_cgroup_size(struct mem_cgroup *memcg) |
1238 | { | |
1239 | return 0; | |
1240 | } | |
1241 | ||
e222432b | 1242 | static inline void |
f0c867d9 | 1243 | mem_cgroup_print_oom_context(struct mem_cgroup *memcg, struct task_struct *p) |
1244 | { | |
1245 | } | |
1246 | ||
1247 | static inline void | |
1248 | mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg) | |
e222432b BS |
1249 | { |
1250 | } | |
1251 | ||
1c824a68 | 1252 | static inline void lock_page_memcg(struct page *page) |
89c06bd5 KH |
1253 | { |
1254 | } | |
1255 | ||
62cccb8c | 1256 | static inline void unlock_page_memcg(struct page *page) |
89c06bd5 KH |
1257 | { |
1258 | } | |
1259 | ||
b23afb93 TH |
1260 | static inline void mem_cgroup_handle_over_high(void) |
1261 | { | |
1262 | } | |
1263 | ||
29ef680a | 1264 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 JW |
1265 | { |
1266 | } | |
1267 | ||
29ef680a | 1268 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 JW |
1269 | { |
1270 | } | |
1271 | ||
3812c8c8 JW |
1272 | static inline bool task_in_memcg_oom(struct task_struct *p) |
1273 | { | |
1274 | return false; | |
1275 | } | |
1276 | ||
49426420 | 1277 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
3812c8c8 JW |
1278 | { |
1279 | return false; | |
1280 | } | |
1281 | ||
3d8b38eb RG |
1282 | static inline struct mem_cgroup *mem_cgroup_get_oom_group( |
1283 | struct task_struct *victim, struct mem_cgroup *oom_domain) | |
1284 | { | |
1285 | return NULL; | |
1286 | } | |
1287 | ||
1288 | static inline void mem_cgroup_print_oom_group(struct mem_cgroup *memcg) | |
1289 | { | |
1290 | } | |
1291 | ||
00f3ca2c | 1292 | static inline void __mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1293 | int idx, |
00f3ca2c | 1294 | int nr) |
2a2e4885 JW |
1295 | { |
1296 | } | |
1297 | ||
00f3ca2c | 1298 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1299 | int idx, |
00f3ca2c | 1300 | int nr) |
2a2e4885 JW |
1301 | { |
1302 | } | |
1303 | ||
42a30035 JW |
1304 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
1305 | enum node_stat_item idx) | |
1306 | { | |
1307 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
1308 | } | |
1309 | ||
205b20cc JW |
1310 | static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
1311 | enum node_stat_item idx) | |
2a7106f2 | 1312 | { |
00f3ca2c | 1313 | return node_page_state(lruvec_pgdat(lruvec), idx); |
2a7106f2 GT |
1314 | } |
1315 | ||
eedc4e5a RG |
1316 | static inline void __mod_memcg_lruvec_state(struct lruvec *lruvec, |
1317 | enum node_stat_item idx, int val) | |
1318 | { | |
1319 | } | |
1320 | ||
da3ceeff | 1321 | static inline void __mod_lruvec_kmem_state(void *p, enum node_stat_item idx, |
ec9f0238 RG |
1322 | int val) |
1323 | { | |
1324 | struct page *page = virt_to_head_page(p); | |
1325 | ||
1326 | __mod_node_page_state(page_pgdat(page), idx, val); | |
1327 | } | |
1328 | ||
da3ceeff | 1329 | static inline void mod_lruvec_kmem_state(void *p, enum node_stat_item idx, |
991e7673 SB |
1330 | int val) |
1331 | { | |
1332 | struct page *page = virt_to_head_page(p); | |
1333 | ||
1334 | mod_node_page_state(page_pgdat(page), idx, val); | |
1335 | } | |
1336 | ||
4e416953 | 1337 | static inline |
ef8f2327 | 1338 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
0608f43d AM |
1339 | gfp_t gfp_mask, |
1340 | unsigned long *total_scanned) | |
4e416953 | 1341 | { |
0608f43d | 1342 | return 0; |
4e416953 BS |
1343 | } |
1344 | ||
be6c8982 | 1345 | static inline void split_page_memcg(struct page *head, unsigned int nr) |
ca3e0214 KH |
1346 | { |
1347 | } | |
1348 | ||
2262185c RG |
1349 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
1350 | enum vm_event_item idx, | |
1351 | unsigned long count) | |
1352 | { | |
1353 | } | |
1354 | ||
9851ac13 KT |
1355 | static inline void __count_memcg_events(struct mem_cgroup *memcg, |
1356 | enum vm_event_item idx, | |
1357 | unsigned long count) | |
1358 | { | |
1359 | } | |
1360 | ||
2262185c | 1361 | static inline void count_memcg_page_event(struct page *page, |
04fecbf5 | 1362 | int idx) |
2262185c RG |
1363 | { |
1364 | } | |
1365 | ||
456f998e | 1366 | static inline |
2262185c | 1367 | void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx) |
456f998e YH |
1368 | { |
1369 | } | |
6168d0da AS |
1370 | |
1371 | static inline void lruvec_memcg_debug(struct lruvec *lruvec, struct page *page) | |
1372 | { | |
1373 | } | |
c255a458 | 1374 | #endif /* CONFIG_MEMCG */ |
78fb7466 | 1375 | |
da3ceeff | 1376 | static inline void __inc_lruvec_kmem_state(void *p, enum node_stat_item idx) |
ec9f0238 | 1377 | { |
da3ceeff | 1378 | __mod_lruvec_kmem_state(p, idx, 1); |
ec9f0238 RG |
1379 | } |
1380 | ||
da3ceeff | 1381 | static inline void __dec_lruvec_kmem_state(void *p, enum node_stat_item idx) |
ec9f0238 | 1382 | { |
da3ceeff | 1383 | __mod_lruvec_kmem_state(p, idx, -1); |
ec9f0238 RG |
1384 | } |
1385 | ||
7cf111bc JW |
1386 | static inline struct lruvec *parent_lruvec(struct lruvec *lruvec) |
1387 | { | |
1388 | struct mem_cgroup *memcg; | |
1389 | ||
1390 | memcg = lruvec_memcg(lruvec); | |
1391 | if (!memcg) | |
1392 | return NULL; | |
1393 | memcg = parent_mem_cgroup(memcg); | |
1394 | if (!memcg) | |
1395 | return NULL; | |
1396 | return mem_cgroup_lruvec(memcg, lruvec_pgdat(lruvec)); | |
1397 | } | |
1398 | ||
6168d0da AS |
1399 | static inline void unlock_page_lruvec(struct lruvec *lruvec) |
1400 | { | |
1401 | spin_unlock(&lruvec->lru_lock); | |
1402 | } | |
1403 | ||
1404 | static inline void unlock_page_lruvec_irq(struct lruvec *lruvec) | |
1405 | { | |
1406 | spin_unlock_irq(&lruvec->lru_lock); | |
1407 | } | |
1408 | ||
1409 | static inline void unlock_page_lruvec_irqrestore(struct lruvec *lruvec, | |
1410 | unsigned long flags) | |
1411 | { | |
1412 | spin_unlock_irqrestore(&lruvec->lru_lock, flags); | |
1413 | } | |
1414 | ||
2a5e4e34 AD |
1415 | /* Don't lock again iff page's lruvec locked */ |
1416 | static inline struct lruvec *relock_page_lruvec_irq(struct page *page, | |
1417 | struct lruvec *locked_lruvec) | |
1418 | { | |
1419 | if (locked_lruvec) { | |
1420 | if (lruvec_holds_page_lru_lock(page, locked_lruvec)) | |
1421 | return locked_lruvec; | |
1422 | ||
1423 | unlock_page_lruvec_irq(locked_lruvec); | |
1424 | } | |
1425 | ||
1426 | return lock_page_lruvec_irq(page); | |
1427 | } | |
1428 | ||
1429 | /* Don't lock again iff page's lruvec locked */ | |
1430 | static inline struct lruvec *relock_page_lruvec_irqsave(struct page *page, | |
1431 | struct lruvec *locked_lruvec, unsigned long *flags) | |
1432 | { | |
1433 | if (locked_lruvec) { | |
1434 | if (lruvec_holds_page_lru_lock(page, locked_lruvec)) | |
1435 | return locked_lruvec; | |
1436 | ||
1437 | unlock_page_lruvec_irqrestore(locked_lruvec, *flags); | |
1438 | } | |
1439 | ||
1440 | return lock_page_lruvec_irqsave(page, flags); | |
1441 | } | |
1442 | ||
52ebea74 | 1443 | #ifdef CONFIG_CGROUP_WRITEBACK |
841710aa | 1444 | |
841710aa | 1445 | struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb); |
c5edf9cd TH |
1446 | void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages, |
1447 | unsigned long *pheadroom, unsigned long *pdirty, | |
1448 | unsigned long *pwriteback); | |
841710aa | 1449 | |
97b27821 TH |
1450 | void mem_cgroup_track_foreign_dirty_slowpath(struct page *page, |
1451 | struct bdi_writeback *wb); | |
1452 | ||
1453 | static inline void mem_cgroup_track_foreign_dirty(struct page *page, | |
1454 | struct bdi_writeback *wb) | |
1455 | { | |
08d1d0e6 BH |
1456 | if (mem_cgroup_disabled()) |
1457 | return; | |
1458 | ||
bcfe06bf | 1459 | if (unlikely(&page_memcg(page)->css != wb->memcg_css)) |
97b27821 TH |
1460 | mem_cgroup_track_foreign_dirty_slowpath(page, wb); |
1461 | } | |
1462 | ||
1463 | void mem_cgroup_flush_foreign(struct bdi_writeback *wb); | |
1464 | ||
841710aa TH |
1465 | #else /* CONFIG_CGROUP_WRITEBACK */ |
1466 | ||
1467 | static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb) | |
1468 | { | |
1469 | return NULL; | |
1470 | } | |
1471 | ||
c2aa723a | 1472 | static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb, |
c5edf9cd TH |
1473 | unsigned long *pfilepages, |
1474 | unsigned long *pheadroom, | |
c2aa723a TH |
1475 | unsigned long *pdirty, |
1476 | unsigned long *pwriteback) | |
1477 | { | |
1478 | } | |
1479 | ||
97b27821 TH |
1480 | static inline void mem_cgroup_track_foreign_dirty(struct page *page, |
1481 | struct bdi_writeback *wb) | |
1482 | { | |
1483 | } | |
1484 | ||
1485 | static inline void mem_cgroup_flush_foreign(struct bdi_writeback *wb) | |
1486 | { | |
1487 | } | |
1488 | ||
841710aa | 1489 | #endif /* CONFIG_CGROUP_WRITEBACK */ |
52ebea74 | 1490 | |
e1aab161 | 1491 | struct sock; |
baac50bb JW |
1492 | bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); |
1493 | void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); | |
d886f4e4 | 1494 | #ifdef CONFIG_MEMCG |
ef12947c JW |
1495 | extern struct static_key_false memcg_sockets_enabled_key; |
1496 | #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key) | |
2d758073 JW |
1497 | void mem_cgroup_sk_alloc(struct sock *sk); |
1498 | void mem_cgroup_sk_free(struct sock *sk); | |
baac50bb | 1499 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c | 1500 | { |
0db15298 | 1501 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && memcg->tcpmem_pressure) |
8e8ae645 | 1502 | return true; |
8e8ae645 JW |
1503 | do { |
1504 | if (time_before(jiffies, memcg->socket_pressure)) | |
1505 | return true; | |
1506 | } while ((memcg = parent_mem_cgroup(memcg))); | |
1507 | return false; | |
e805605c | 1508 | } |
0a432dcb YS |
1509 | |
1510 | extern int memcg_expand_shrinker_maps(int new_id); | |
1511 | ||
1512 | extern void memcg_set_shrinker_bit(struct mem_cgroup *memcg, | |
1513 | int nid, int shrinker_id); | |
e805605c | 1514 | #else |
80e95fe0 | 1515 | #define mem_cgroup_sockets_enabled 0 |
2d758073 JW |
1516 | static inline void mem_cgroup_sk_alloc(struct sock *sk) { }; |
1517 | static inline void mem_cgroup_sk_free(struct sock *sk) { }; | |
baac50bb | 1518 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c JW |
1519 | { |
1520 | return false; | |
1521 | } | |
0a432dcb YS |
1522 | |
1523 | static inline void memcg_set_shrinker_bit(struct mem_cgroup *memcg, | |
1524 | int nid, int shrinker_id) | |
1525 | { | |
1526 | } | |
e805605c | 1527 | #endif |
7ae1e1d0 | 1528 | |
9b6f7e16 | 1529 | #ifdef CONFIG_MEMCG_KMEM |
f4b00eab RG |
1530 | int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, int order); |
1531 | void __memcg_kmem_uncharge_page(struct page *page, int order); | |
45264778 | 1532 | |
bf4f0599 RG |
1533 | struct obj_cgroup *get_obj_cgroup_from_current(void); |
1534 | ||
1535 | int obj_cgroup_charge(struct obj_cgroup *objcg, gfp_t gfp, size_t size); | |
1536 | void obj_cgroup_uncharge(struct obj_cgroup *objcg, size_t size); | |
1537 | ||
ef12947c | 1538 | extern struct static_key_false memcg_kmem_enabled_key; |
749c5415 | 1539 | |
dbcf73e2 | 1540 | extern int memcg_nr_cache_ids; |
64219994 MH |
1541 | void memcg_get_cache_ids(void); |
1542 | void memcg_put_cache_ids(void); | |
ebe945c2 GC |
1543 | |
1544 | /* | |
1545 | * Helper macro to loop through all memcg-specific caches. Callers must still | |
1546 | * check if the cache is valid (it is either valid or NULL). | |
1547 | * the slab_mutex must be held when looping through those caches | |
1548 | */ | |
749c5415 | 1549 | #define for_each_memcg_cache_index(_idx) \ |
dbcf73e2 | 1550 | for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++) |
749c5415 | 1551 | |
7ae1e1d0 GC |
1552 | static inline bool memcg_kmem_enabled(void) |
1553 | { | |
eda330e5 | 1554 | return static_branch_likely(&memcg_kmem_enabled_key); |
7ae1e1d0 GC |
1555 | } |
1556 | ||
f4b00eab RG |
1557 | static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1558 | int order) | |
60cd4bcd SB |
1559 | { |
1560 | if (memcg_kmem_enabled()) | |
f4b00eab | 1561 | return __memcg_kmem_charge_page(page, gfp, order); |
60cd4bcd SB |
1562 | return 0; |
1563 | } | |
1564 | ||
f4b00eab | 1565 | static inline void memcg_kmem_uncharge_page(struct page *page, int order) |
60cd4bcd SB |
1566 | { |
1567 | if (memcg_kmem_enabled()) | |
f4b00eab | 1568 | __memcg_kmem_uncharge_page(page, order); |
60cd4bcd SB |
1569 | } |
1570 | ||
33398cf2 | 1571 | /* |
a7cb874b RG |
1572 | * A helper for accessing memcg's kmem_id, used for getting |
1573 | * corresponding LRU lists. | |
33398cf2 MH |
1574 | */ |
1575 | static inline int memcg_cache_id(struct mem_cgroup *memcg) | |
1576 | { | |
1577 | return memcg ? memcg->kmemcg_id : -1; | |
1578 | } | |
5722d094 | 1579 | |
8380ce47 RG |
1580 | struct mem_cgroup *mem_cgroup_from_obj(void *p); |
1581 | ||
7ae1e1d0 | 1582 | #else |
9b6f7e16 | 1583 | |
f4b00eab RG |
1584 | static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1585 | int order) | |
9b6f7e16 RG |
1586 | { |
1587 | return 0; | |
1588 | } | |
1589 | ||
f4b00eab | 1590 | static inline void memcg_kmem_uncharge_page(struct page *page, int order) |
9b6f7e16 RG |
1591 | { |
1592 | } | |
1593 | ||
f4b00eab RG |
1594 | static inline int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1595 | int order) | |
60cd4bcd SB |
1596 | { |
1597 | return 0; | |
1598 | } | |
1599 | ||
f4b00eab | 1600 | static inline void __memcg_kmem_uncharge_page(struct page *page, int order) |
60cd4bcd SB |
1601 | { |
1602 | } | |
1603 | ||
749c5415 GC |
1604 | #define for_each_memcg_cache_index(_idx) \ |
1605 | for (; NULL; ) | |
1606 | ||
b9ce5ef4 GC |
1607 | static inline bool memcg_kmem_enabled(void) |
1608 | { | |
1609 | return false; | |
1610 | } | |
1611 | ||
2633d7a0 GC |
1612 | static inline int memcg_cache_id(struct mem_cgroup *memcg) |
1613 | { | |
1614 | return -1; | |
1615 | } | |
1616 | ||
05257a1a VD |
1617 | static inline void memcg_get_cache_ids(void) |
1618 | { | |
1619 | } | |
1620 | ||
1621 | static inline void memcg_put_cache_ids(void) | |
1622 | { | |
1623 | } | |
1624 | ||
8380ce47 RG |
1625 | static inline struct mem_cgroup *mem_cgroup_from_obj(void *p) |
1626 | { | |
1627 | return NULL; | |
1628 | } | |
1629 | ||
84c07d11 | 1630 | #endif /* CONFIG_MEMCG_KMEM */ |
127424c8 | 1631 | |
8cdea7c0 | 1632 | #endif /* _LINUX_MEMCONTROL_H */ |