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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, |
4e5aa1f4 | 36 | MEMCG_VMALLOC, |
b2807f07 | 37 | MEMCG_NR_STAT, |
2a7106f2 GT |
38 | }; |
39 | ||
e27be240 JW |
40 | enum memcg_memory_event { |
41 | MEMCG_LOW, | |
71cd3113 JW |
42 | MEMCG_HIGH, |
43 | MEMCG_MAX, | |
44 | MEMCG_OOM, | |
fe6bdfc8 | 45 | MEMCG_OOM_KILL, |
b6bf9abb | 46 | MEMCG_OOM_GROUP_KILL, |
4b82ab4f | 47 | MEMCG_SWAP_HIGH, |
f3a53a3a TH |
48 | MEMCG_SWAP_MAX, |
49 | MEMCG_SWAP_FAIL, | |
e27be240 | 50 | MEMCG_NR_MEMORY_EVENTS, |
71cd3113 JW |
51 | }; |
52 | ||
5660048c | 53 | struct mem_cgroup_reclaim_cookie { |
ef8f2327 | 54 | pg_data_t *pgdat; |
5660048c JW |
55 | unsigned int generation; |
56 | }; | |
57 | ||
71cd3113 JW |
58 | #ifdef CONFIG_MEMCG |
59 | ||
60 | #define MEM_CGROUP_ID_SHIFT 16 | |
61 | #define MEM_CGROUP_ID_MAX USHRT_MAX | |
62 | ||
63 | struct mem_cgroup_id { | |
64 | int id; | |
1c2d479a | 65 | refcount_t ref; |
71cd3113 JW |
66 | }; |
67 | ||
33398cf2 MH |
68 | /* |
69 | * Per memcg event counter is incremented at every pagein/pageout. With THP, | |
0845f831 RD |
70 | * it will be incremented by the number of pages. This counter is used |
71 | * to trigger some periodic events. This is straightforward and better | |
33398cf2 MH |
72 | * than using jiffies etc. to handle periodic memcg event. |
73 | */ | |
74 | enum mem_cgroup_events_target { | |
75 | MEM_CGROUP_TARGET_THRESH, | |
76 | MEM_CGROUP_TARGET_SOFTLIMIT, | |
33398cf2 MH |
77 | MEM_CGROUP_NTARGETS, |
78 | }; | |
79 | ||
871789d4 | 80 | struct memcg_vmstats_percpu { |
2d146aa3 JW |
81 | /* Local (CPU and cgroup) page state & events */ |
82 | long state[MEMCG_NR_STAT]; | |
83 | unsigned long events[NR_VM_EVENT_ITEMS]; | |
84 | ||
85 | /* Delta calculation for lockless upward propagation */ | |
86 | long state_prev[MEMCG_NR_STAT]; | |
87 | unsigned long events_prev[NR_VM_EVENT_ITEMS]; | |
88 | ||
89 | /* Cgroup1: threshold notifications & softlimit tree updates */ | |
90 | unsigned long nr_page_events; | |
91 | unsigned long targets[MEM_CGROUP_NTARGETS]; | |
92 | }; | |
93 | ||
94 | struct memcg_vmstats { | |
95 | /* Aggregated (CPU and subtree) page state & events */ | |
96 | long state[MEMCG_NR_STAT]; | |
97 | unsigned long events[NR_VM_EVENT_ITEMS]; | |
98 | ||
99 | /* Pending child counts during tree propagation */ | |
100 | long state_pending[MEMCG_NR_STAT]; | |
101 | unsigned long events_pending[NR_VM_EVENT_ITEMS]; | |
33398cf2 MH |
102 | }; |
103 | ||
104 | struct mem_cgroup_reclaim_iter { | |
105 | struct mem_cgroup *position; | |
106 | /* scan generation, increased every round-trip */ | |
107 | unsigned int generation; | |
108 | }; | |
109 | ||
0a4465d3 | 110 | /* |
3c6f17e6 YS |
111 | * Bitmap and deferred work of shrinker::id corresponding to memcg-aware |
112 | * shrinkers, which have elements charged to this memcg. | |
0a4465d3 | 113 | */ |
e4262c4f | 114 | struct shrinker_info { |
0a4465d3 | 115 | struct rcu_head rcu; |
3c6f17e6 YS |
116 | atomic_long_t *nr_deferred; |
117 | unsigned long *map; | |
0a4465d3 KT |
118 | }; |
119 | ||
7e1c0d6f SB |
120 | struct lruvec_stats_percpu { |
121 | /* Local (CPU and cgroup) state */ | |
122 | long state[NR_VM_NODE_STAT_ITEMS]; | |
123 | ||
124 | /* Delta calculation for lockless upward propagation */ | |
125 | long state_prev[NR_VM_NODE_STAT_ITEMS]; | |
126 | }; | |
127 | ||
128 | struct lruvec_stats { | |
129 | /* Aggregated (CPU and subtree) state */ | |
130 | long state[NR_VM_NODE_STAT_ITEMS]; | |
131 | ||
132 | /* Pending child counts during tree propagation */ | |
133 | long state_pending[NR_VM_NODE_STAT_ITEMS]; | |
134 | }; | |
135 | ||
33398cf2 | 136 | /* |
242c37b4 | 137 | * per-node information in memory controller. |
33398cf2 | 138 | */ |
ef8f2327 | 139 | struct mem_cgroup_per_node { |
33398cf2 | 140 | struct lruvec lruvec; |
a983b5eb | 141 | |
7e1c0d6f SB |
142 | struct lruvec_stats_percpu __percpu *lruvec_stats_percpu; |
143 | struct lruvec_stats lruvec_stats; | |
a983b5eb | 144 | |
b4536f0c | 145 | unsigned long lru_zone_size[MAX_NR_ZONES][NR_LRU_LISTS]; |
33398cf2 | 146 | |
9da83f3f | 147 | struct mem_cgroup_reclaim_iter iter; |
33398cf2 | 148 | |
e4262c4f | 149 | struct shrinker_info __rcu *shrinker_info; |
0a432dcb | 150 | |
33398cf2 MH |
151 | struct rb_node tree_node; /* RB tree node */ |
152 | unsigned long usage_in_excess;/* Set to the value by which */ | |
153 | /* the soft limit is exceeded*/ | |
154 | bool on_tree; | |
155 | struct mem_cgroup *memcg; /* Back pointer, we cannot */ | |
156 | /* use container_of */ | |
157 | }; | |
158 | ||
33398cf2 MH |
159 | struct mem_cgroup_threshold { |
160 | struct eventfd_ctx *eventfd; | |
161 | unsigned long threshold; | |
162 | }; | |
163 | ||
164 | /* For threshold */ | |
165 | struct mem_cgroup_threshold_ary { | |
166 | /* An array index points to threshold just below or equal to usage. */ | |
167 | int current_threshold; | |
168 | /* Size of entries[] */ | |
169 | unsigned int size; | |
170 | /* Array of thresholds */ | |
307ed94c | 171 | struct mem_cgroup_threshold entries[]; |
33398cf2 MH |
172 | }; |
173 | ||
174 | struct mem_cgroup_thresholds { | |
175 | /* Primary thresholds array */ | |
176 | struct mem_cgroup_threshold_ary *primary; | |
177 | /* | |
178 | * Spare threshold array. | |
179 | * This is needed to make mem_cgroup_unregister_event() "never fail". | |
180 | * It must be able to store at least primary->size - 1 entries. | |
181 | */ | |
182 | struct mem_cgroup_threshold_ary *spare; | |
183 | }; | |
184 | ||
e81bf979 AL |
185 | #if defined(CONFIG_SMP) |
186 | struct memcg_padding { | |
187 | char x[0]; | |
188 | } ____cacheline_internodealigned_in_smp; | |
6a1803bb | 189 | #define MEMCG_PADDING(name) struct memcg_padding name |
e81bf979 AL |
190 | #else |
191 | #define MEMCG_PADDING(name) | |
192 | #endif | |
193 | ||
97b27821 TH |
194 | /* |
195 | * Remember four most recent foreign writebacks with dirty pages in this | |
196 | * cgroup. Inode sharing is expected to be uncommon and, even if we miss | |
197 | * one in a given round, we're likely to catch it later if it keeps | |
198 | * foreign-dirtying, so a fairly low count should be enough. | |
199 | * | |
200 | * See mem_cgroup_track_foreign_dirty_slowpath() for details. | |
201 | */ | |
202 | #define MEMCG_CGWB_FRN_CNT 4 | |
203 | ||
204 | struct memcg_cgwb_frn { | |
205 | u64 bdi_id; /* bdi->id of the foreign inode */ | |
206 | int memcg_id; /* memcg->css.id of foreign inode */ | |
207 | u64 at; /* jiffies_64 at the time of dirtying */ | |
208 | struct wb_completion done; /* tracks in-flight foreign writebacks */ | |
209 | }; | |
210 | ||
bf4f0599 RG |
211 | /* |
212 | * Bucket for arbitrarily byte-sized objects charged to a memory | |
213 | * cgroup. The bucket can be reparented in one piece when the cgroup | |
214 | * is destroyed, without having to round up the individual references | |
215 | * of all live memory objects in the wild. | |
216 | */ | |
217 | struct obj_cgroup { | |
218 | struct percpu_ref refcnt; | |
219 | struct mem_cgroup *memcg; | |
220 | atomic_t nr_charged_bytes; | |
221 | union { | |
222 | struct list_head list; | |
223 | struct rcu_head rcu; | |
224 | }; | |
225 | }; | |
226 | ||
33398cf2 MH |
227 | /* |
228 | * The memory controller data structure. The memory controller controls both | |
229 | * page cache and RSS per cgroup. We would eventually like to provide | |
230 | * statistics based on the statistics developed by Rik Van Riel for clock-pro, | |
231 | * to help the administrator determine what knobs to tune. | |
232 | */ | |
233 | struct mem_cgroup { | |
234 | struct cgroup_subsys_state css; | |
235 | ||
73f576c0 JW |
236 | /* Private memcg ID. Used to ID objects that outlive the cgroup */ |
237 | struct mem_cgroup_id id; | |
238 | ||
33398cf2 | 239 | /* Accounted resources */ |
bd0b230f WL |
240 | struct page_counter memory; /* Both v1 & v2 */ |
241 | ||
242 | union { | |
243 | struct page_counter swap; /* v2 only */ | |
244 | struct page_counter memsw; /* v1 only */ | |
245 | }; | |
0db15298 JW |
246 | |
247 | /* Legacy consumer-oriented counters */ | |
bd0b230f WL |
248 | struct page_counter kmem; /* v1 only */ |
249 | struct page_counter tcpmem; /* v1 only */ | |
33398cf2 | 250 | |
f7e1cb6e JW |
251 | /* Range enforcement for interrupt charges */ |
252 | struct work_struct high_work; | |
253 | ||
33398cf2 MH |
254 | unsigned long soft_limit; |
255 | ||
256 | /* vmpressure notifications */ | |
257 | struct vmpressure vmpressure; | |
258 | ||
3d8b38eb RG |
259 | /* |
260 | * Should the OOM killer kill all belonging tasks, had it kill one? | |
261 | */ | |
262 | bool oom_group; | |
263 | ||
33398cf2 MH |
264 | /* protected by memcg_oom_lock */ |
265 | bool oom_lock; | |
266 | int under_oom; | |
267 | ||
268 | int swappiness; | |
269 | /* OOM-Killer disable */ | |
270 | int oom_kill_disable; | |
271 | ||
1e577f97 | 272 | /* memory.events and memory.events.local */ |
472912a2 | 273 | struct cgroup_file events_file; |
1e577f97 | 274 | struct cgroup_file events_local_file; |
472912a2 | 275 | |
f3a53a3a TH |
276 | /* handle for "memory.swap.events" */ |
277 | struct cgroup_file swap_events_file; | |
278 | ||
33398cf2 MH |
279 | /* protect arrays of thresholds */ |
280 | struct mutex thresholds_lock; | |
281 | ||
282 | /* thresholds for memory usage. RCU-protected */ | |
283 | struct mem_cgroup_thresholds thresholds; | |
284 | ||
285 | /* thresholds for mem+swap usage. RCU-protected */ | |
286 | struct mem_cgroup_thresholds memsw_thresholds; | |
287 | ||
288 | /* For oom notifier event fd */ | |
289 | struct list_head oom_notify; | |
290 | ||
291 | /* | |
292 | * Should we move charges of a task when a task is moved into this | |
293 | * mem_cgroup ? And what type of charges should we move ? | |
294 | */ | |
295 | unsigned long move_charge_at_immigrate; | |
e81bf979 AL |
296 | /* taken only while moving_account > 0 */ |
297 | spinlock_t move_lock; | |
298 | unsigned long move_lock_flags; | |
299 | ||
300 | MEMCG_PADDING(_pad1_); | |
301 | ||
2d146aa3 JW |
302 | /* memory.stat */ |
303 | struct memcg_vmstats vmstats; | |
42a30035 | 304 | |
815744d7 | 305 | /* memory.events */ |
42a30035 | 306 | atomic_long_t memory_events[MEMCG_NR_MEMORY_EVENTS]; |
1e577f97 | 307 | atomic_long_t memory_events_local[MEMCG_NR_MEMORY_EVENTS]; |
33398cf2 | 308 | |
d886f4e4 JW |
309 | unsigned long socket_pressure; |
310 | ||
311 | /* Legacy tcp memory accounting */ | |
0db15298 JW |
312 | bool tcpmem_active; |
313 | int tcpmem_pressure; | |
d886f4e4 | 314 | |
84c07d11 | 315 | #ifdef CONFIG_MEMCG_KMEM |
33398cf2 | 316 | int kmemcg_id; |
bf4f0599 RG |
317 | struct obj_cgroup __rcu *objcg; |
318 | struct list_head objcg_list; /* list of inherited objcgs */ | |
33398cf2 MH |
319 | #endif |
320 | ||
4df91062 FT |
321 | MEMCG_PADDING(_pad2_); |
322 | ||
323 | /* | |
324 | * set > 0 if pages under this cgroup are moving to other cgroup. | |
325 | */ | |
326 | atomic_t moving_account; | |
327 | struct task_struct *move_lock_task; | |
328 | ||
4df91062 FT |
329 | struct memcg_vmstats_percpu __percpu *vmstats_percpu; |
330 | ||
33398cf2 MH |
331 | #ifdef CONFIG_CGROUP_WRITEBACK |
332 | struct list_head cgwb_list; | |
333 | struct wb_domain cgwb_domain; | |
97b27821 | 334 | struct memcg_cgwb_frn cgwb_frn[MEMCG_CGWB_FRN_CNT]; |
33398cf2 MH |
335 | #endif |
336 | ||
337 | /* List of events which userspace want to receive */ | |
338 | struct list_head event_list; | |
339 | spinlock_t event_list_lock; | |
340 | ||
87eaceb3 YS |
341 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
342 | struct deferred_split deferred_split_queue; | |
343 | #endif | |
344 | ||
b51478a0 | 345 | struct mem_cgroup_per_node *nodeinfo[]; |
33398cf2 | 346 | }; |
7d828602 | 347 | |
a983b5eb JW |
348 | /* |
349 | * size of first charge trial. "32" comes from vmscan.c's magic value. | |
350 | * TODO: maybe necessary to use big numbers in big irons. | |
351 | */ | |
352 | #define MEMCG_CHARGE_BATCH 32U | |
353 | ||
7d828602 | 354 | extern struct mem_cgroup *root_mem_cgroup; |
56161634 | 355 | |
87944e29 RG |
356 | enum page_memcg_data_flags { |
357 | /* page->memcg_data is a pointer to an objcgs vector */ | |
358 | MEMCG_DATA_OBJCGS = (1UL << 0), | |
18b2db3b RG |
359 | /* page has been accounted as a non-slab kernel page */ |
360 | MEMCG_DATA_KMEM = (1UL << 1), | |
87944e29 | 361 | /* the next bit after the last actual flag */ |
18b2db3b | 362 | __NR_MEMCG_DATA_FLAGS = (1UL << 2), |
87944e29 RG |
363 | }; |
364 | ||
365 | #define MEMCG_DATA_FLAGS_MASK (__NR_MEMCG_DATA_FLAGS - 1) | |
366 | ||
1b7e4464 | 367 | static inline bool folio_memcg_kmem(struct folio *folio); |
b4e0b68f MS |
368 | |
369 | /* | |
370 | * After the initialization objcg->memcg is always pointing at | |
371 | * a valid memcg, but can be atomically swapped to the parent memcg. | |
372 | * | |
373 | * The caller must ensure that the returned memcg won't be released: | |
374 | * e.g. acquire the rcu_read_lock or css_set_lock. | |
375 | */ | |
376 | static inline struct mem_cgroup *obj_cgroup_memcg(struct obj_cgroup *objcg) | |
377 | { | |
378 | return READ_ONCE(objcg->memcg); | |
379 | } | |
380 | ||
381 | /* | |
1b7e4464 MWO |
382 | * __folio_memcg - Get the memory cgroup associated with a non-kmem folio |
383 | * @folio: Pointer to the folio. | |
b4e0b68f | 384 | * |
1b7e4464 MWO |
385 | * Returns a pointer to the memory cgroup associated with the folio, |
386 | * or NULL. This function assumes that the folio is known to have a | |
b4e0b68f | 387 | * proper memory cgroup pointer. It's not safe to call this function |
1b7e4464 MWO |
388 | * against some type of folios, e.g. slab folios or ex-slab folios or |
389 | * kmem folios. | |
b4e0b68f | 390 | */ |
1b7e4464 | 391 | static inline struct mem_cgroup *__folio_memcg(struct folio *folio) |
b4e0b68f | 392 | { |
1b7e4464 | 393 | unsigned long memcg_data = folio->memcg_data; |
b4e0b68f | 394 | |
1b7e4464 MWO |
395 | VM_BUG_ON_FOLIO(folio_test_slab(folio), folio); |
396 | VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_OBJCGS, folio); | |
397 | VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_KMEM, folio); | |
b4e0b68f MS |
398 | |
399 | return (struct mem_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); | |
400 | } | |
401 | ||
402 | /* | |
1b7e4464 MWO |
403 | * __folio_objcg - get the object cgroup associated with a kmem folio. |
404 | * @folio: Pointer to the folio. | |
b4e0b68f | 405 | * |
1b7e4464 MWO |
406 | * Returns a pointer to the object cgroup associated with the folio, |
407 | * or NULL. This function assumes that the folio is known to have a | |
b4e0b68f | 408 | * proper object cgroup pointer. It's not safe to call this function |
1b7e4464 MWO |
409 | * against some type of folios, e.g. slab folios or ex-slab folios or |
410 | * LRU folios. | |
b4e0b68f | 411 | */ |
1b7e4464 | 412 | static inline struct obj_cgroup *__folio_objcg(struct folio *folio) |
b4e0b68f | 413 | { |
1b7e4464 | 414 | unsigned long memcg_data = folio->memcg_data; |
b4e0b68f | 415 | |
1b7e4464 MWO |
416 | VM_BUG_ON_FOLIO(folio_test_slab(folio), folio); |
417 | VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_OBJCGS, folio); | |
418 | VM_BUG_ON_FOLIO(!(memcg_data & MEMCG_DATA_KMEM), folio); | |
b4e0b68f MS |
419 | |
420 | return (struct obj_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); | |
421 | } | |
422 | ||
bcfe06bf | 423 | /* |
1b7e4464 MWO |
424 | * folio_memcg - Get the memory cgroup associated with a folio. |
425 | * @folio: Pointer to the folio. | |
bcfe06bf | 426 | * |
1b7e4464 MWO |
427 | * Returns a pointer to the memory cgroup associated with the folio, |
428 | * or NULL. This function assumes that the folio is known to have a | |
bcfe06bf | 429 | * proper memory cgroup pointer. It's not safe to call this function |
1b7e4464 | 430 | * against some type of folios, e.g. slab folios or ex-slab folios. |
bcfe06bf | 431 | * |
1b7e4464 | 432 | * For a non-kmem folio any of the following ensures folio and memcg binding |
b4e0b68f MS |
433 | * stability: |
434 | * | |
1b7e4464 | 435 | * - the folio lock |
bcfe06bf RG |
436 | * - LRU isolation |
437 | * - lock_page_memcg() | |
438 | * - exclusive reference | |
b4e0b68f | 439 | * |
1b7e4464 MWO |
440 | * For a kmem folio a caller should hold an rcu read lock to protect memcg |
441 | * associated with a kmem folio from being released. | |
bcfe06bf | 442 | */ |
1b7e4464 MWO |
443 | static inline struct mem_cgroup *folio_memcg(struct folio *folio) |
444 | { | |
445 | if (folio_memcg_kmem(folio)) | |
446 | return obj_cgroup_memcg(__folio_objcg(folio)); | |
447 | return __folio_memcg(folio); | |
448 | } | |
449 | ||
bcfe06bf RG |
450 | static inline struct mem_cgroup *page_memcg(struct page *page) |
451 | { | |
1b7e4464 | 452 | return folio_memcg(page_folio(page)); |
bcfe06bf RG |
453 | } |
454 | ||
c5ce619a MWO |
455 | /** |
456 | * folio_memcg_rcu - Locklessly get the memory cgroup associated with a folio. | |
457 | * @folio: Pointer to the folio. | |
bcfe06bf | 458 | * |
c5ce619a | 459 | * This function assumes that the folio is known to have a |
bcfe06bf | 460 | * proper memory cgroup pointer. It's not safe to call this function |
c5ce619a MWO |
461 | * against some type of folios, e.g. slab folios or ex-slab folios. |
462 | * | |
463 | * Return: A pointer to the memory cgroup associated with the folio, | |
464 | * or NULL. | |
bcfe06bf | 465 | */ |
c5ce619a | 466 | static inline struct mem_cgroup *folio_memcg_rcu(struct folio *folio) |
bcfe06bf | 467 | { |
c5ce619a | 468 | unsigned long memcg_data = READ_ONCE(folio->memcg_data); |
b4e0b68f | 469 | |
c5ce619a | 470 | VM_BUG_ON_FOLIO(folio_test_slab(folio), folio); |
bcfe06bf RG |
471 | WARN_ON_ONCE(!rcu_read_lock_held()); |
472 | ||
b4e0b68f MS |
473 | if (memcg_data & MEMCG_DATA_KMEM) { |
474 | struct obj_cgroup *objcg; | |
475 | ||
476 | objcg = (void *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); | |
477 | return obj_cgroup_memcg(objcg); | |
478 | } | |
479 | ||
480 | return (struct mem_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); | |
bcfe06bf RG |
481 | } |
482 | ||
483 | /* | |
484 | * page_memcg_check - get the memory cgroup associated with a page | |
485 | * @page: a pointer to the page struct | |
486 | * | |
487 | * Returns a pointer to the memory cgroup associated with the page, | |
b4e0b68f | 488 | * or NULL. This function unlike page_memcg() can take any page |
bcfe06bf | 489 | * as an argument. It has to be used in cases when it's not known if a page |
b4e0b68f MS |
490 | * has an associated memory cgroup pointer or an object cgroups vector or |
491 | * an object cgroup. | |
492 | * | |
493 | * For a non-kmem page any of the following ensures page and memcg binding | |
494 | * stability: | |
bcfe06bf | 495 | * |
bcfe06bf RG |
496 | * - the page lock |
497 | * - LRU isolation | |
498 | * - lock_page_memcg() | |
499 | * - exclusive reference | |
b4e0b68f MS |
500 | * |
501 | * For a kmem page a caller should hold an rcu read lock to protect memcg | |
502 | * associated with a kmem page from being released. | |
bcfe06bf RG |
503 | */ |
504 | static inline struct mem_cgroup *page_memcg_check(struct page *page) | |
505 | { | |
506 | /* | |
507 | * Because page->memcg_data might be changed asynchronously | |
508 | * for slab pages, READ_ONCE() should be used here. | |
509 | */ | |
510 | unsigned long memcg_data = READ_ONCE(page->memcg_data); | |
511 | ||
87944e29 | 512 | if (memcg_data & MEMCG_DATA_OBJCGS) |
bcfe06bf RG |
513 | return NULL; |
514 | ||
b4e0b68f MS |
515 | if (memcg_data & MEMCG_DATA_KMEM) { |
516 | struct obj_cgroup *objcg; | |
517 | ||
518 | objcg = (void *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); | |
519 | return obj_cgroup_memcg(objcg); | |
520 | } | |
521 | ||
18b2db3b RG |
522 | return (struct mem_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); |
523 | } | |
524 | ||
bd290e1e | 525 | #ifdef CONFIG_MEMCG_KMEM |
18b2db3b | 526 | /* |
1b7e4464 MWO |
527 | * folio_memcg_kmem - Check if the folio has the memcg_kmem flag set. |
528 | * @folio: Pointer to the folio. | |
18b2db3b | 529 | * |
1b7e4464 MWO |
530 | * Checks if the folio has MemcgKmem flag set. The caller must ensure |
531 | * that the folio has an associated memory cgroup. It's not safe to call | |
532 | * this function against some types of folios, e.g. slab folios. | |
18b2db3b | 533 | */ |
1b7e4464 | 534 | static inline bool folio_memcg_kmem(struct folio *folio) |
18b2db3b | 535 | { |
1b7e4464 MWO |
536 | VM_BUG_ON_PGFLAGS(PageTail(&folio->page), &folio->page); |
537 | VM_BUG_ON_FOLIO(folio->memcg_data & MEMCG_DATA_OBJCGS, folio); | |
538 | return folio->memcg_data & MEMCG_DATA_KMEM; | |
bcfe06bf RG |
539 | } |
540 | ||
270c6a71 | 541 | |
270c6a71 | 542 | #else |
1b7e4464 | 543 | static inline bool folio_memcg_kmem(struct folio *folio) |
bd290e1e MS |
544 | { |
545 | return false; | |
546 | } | |
547 | ||
270c6a71 RG |
548 | #endif |
549 | ||
1b7e4464 MWO |
550 | static inline bool PageMemcgKmem(struct page *page) |
551 | { | |
552 | return folio_memcg_kmem(page_folio(page)); | |
553 | } | |
554 | ||
dfd2f10c KT |
555 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
556 | { | |
557 | return (memcg == root_mem_cgroup); | |
558 | } | |
559 | ||
23047a96 JW |
560 | static inline bool mem_cgroup_disabled(void) |
561 | { | |
562 | return !cgroup_subsys_enabled(memory_cgrp_subsys); | |
563 | } | |
564 | ||
f56ce412 JW |
565 | static inline void mem_cgroup_protection(struct mem_cgroup *root, |
566 | struct mem_cgroup *memcg, | |
567 | unsigned long *min, | |
568 | unsigned long *low) | |
9783aa99 | 569 | { |
f56ce412 JW |
570 | *min = *low = 0; |
571 | ||
1bc63fb1 | 572 | if (mem_cgroup_disabled()) |
f56ce412 | 573 | return; |
1bc63fb1 | 574 | |
22f7496f YS |
575 | /* |
576 | * There is no reclaim protection applied to a targeted reclaim. | |
577 | * We are special casing this specific case here because | |
578 | * mem_cgroup_protected calculation is not robust enough to keep | |
579 | * the protection invariant for calculated effective values for | |
580 | * parallel reclaimers with different reclaim target. This is | |
581 | * especially a problem for tail memcgs (as they have pages on LRU) | |
582 | * which would want to have effective values 0 for targeted reclaim | |
583 | * but a different value for external reclaim. | |
584 | * | |
585 | * Example | |
586 | * Let's have global and A's reclaim in parallel: | |
587 | * | | |
588 | * A (low=2G, usage = 3G, max = 3G, children_low_usage = 1.5G) | |
589 | * |\ | |
590 | * | C (low = 1G, usage = 2.5G) | |
591 | * B (low = 1G, usage = 0.5G) | |
592 | * | |
593 | * For the global reclaim | |
594 | * A.elow = A.low | |
595 | * B.elow = min(B.usage, B.low) because children_low_usage <= A.elow | |
596 | * C.elow = min(C.usage, C.low) | |
597 | * | |
598 | * With the effective values resetting we have A reclaim | |
599 | * A.elow = 0 | |
600 | * B.elow = B.low | |
601 | * C.elow = C.low | |
602 | * | |
603 | * If the global reclaim races with A's reclaim then | |
604 | * B.elow = C.elow = 0 because children_low_usage > A.elow) | |
605 | * is possible and reclaiming B would be violating the protection. | |
606 | * | |
607 | */ | |
608 | if (root == memcg) | |
f56ce412 | 609 | return; |
9783aa99 | 610 | |
f56ce412 JW |
611 | *min = READ_ONCE(memcg->memory.emin); |
612 | *low = READ_ONCE(memcg->memory.elow); | |
9783aa99 CD |
613 | } |
614 | ||
45c7f7e1 CD |
615 | void mem_cgroup_calculate_protection(struct mem_cgroup *root, |
616 | struct mem_cgroup *memcg); | |
617 | ||
618 | static inline bool mem_cgroup_supports_protection(struct mem_cgroup *memcg) | |
619 | { | |
620 | /* | |
621 | * The root memcg doesn't account charges, and doesn't support | |
622 | * protection. | |
623 | */ | |
624 | return !mem_cgroup_disabled() && !mem_cgroup_is_root(memcg); | |
625 | ||
626 | } | |
627 | ||
628 | static inline bool mem_cgroup_below_low(struct mem_cgroup *memcg) | |
629 | { | |
630 | if (!mem_cgroup_supports_protection(memcg)) | |
631 | return false; | |
632 | ||
633 | return READ_ONCE(memcg->memory.elow) >= | |
634 | page_counter_read(&memcg->memory); | |
635 | } | |
636 | ||
637 | static inline bool mem_cgroup_below_min(struct mem_cgroup *memcg) | |
638 | { | |
639 | if (!mem_cgroup_supports_protection(memcg)) | |
640 | return false; | |
641 | ||
642 | return READ_ONCE(memcg->memory.emin) >= | |
643 | page_counter_read(&memcg->memory); | |
644 | } | |
241994ed | 645 | |
8f425e4e MWO |
646 | int __mem_cgroup_charge(struct folio *folio, struct mm_struct *mm, gfp_t gfp); |
647 | ||
648 | /** | |
649 | * mem_cgroup_charge - Charge a newly allocated folio to a cgroup. | |
650 | * @folio: Folio to charge. | |
651 | * @mm: mm context of the allocating task. | |
652 | * @gfp: Reclaim mode. | |
653 | * | |
654 | * Try to charge @folio to the memcg that @mm belongs to, reclaiming | |
655 | * pages according to @gfp if necessary. If @mm is NULL, try to | |
656 | * charge to the active memcg. | |
657 | * | |
658 | * Do not use this for folios allocated for swapin. | |
659 | * | |
660 | * Return: 0 on success. Otherwise, an error code is returned. | |
661 | */ | |
662 | static inline int mem_cgroup_charge(struct folio *folio, struct mm_struct *mm, | |
663 | gfp_t gfp) | |
2c8d8f97 SB |
664 | { |
665 | if (mem_cgroup_disabled()) | |
666 | return 0; | |
8f425e4e | 667 | return __mem_cgroup_charge(folio, mm, gfp); |
2c8d8f97 SB |
668 | } |
669 | ||
0add0c77 SB |
670 | int mem_cgroup_swapin_charge_page(struct page *page, struct mm_struct *mm, |
671 | gfp_t gfp, swp_entry_t entry); | |
672 | void mem_cgroup_swapin_uncharge_swap(swp_entry_t entry); | |
3fea5a49 | 673 | |
bbc6b703 MWO |
674 | void __mem_cgroup_uncharge(struct folio *folio); |
675 | ||
676 | /** | |
677 | * mem_cgroup_uncharge - Uncharge a folio. | |
678 | * @folio: Folio to uncharge. | |
679 | * | |
680 | * Uncharge a folio previously charged with mem_cgroup_charge(). | |
681 | */ | |
682 | static inline void mem_cgroup_uncharge(struct folio *folio) | |
2c8d8f97 SB |
683 | { |
684 | if (mem_cgroup_disabled()) | |
685 | return; | |
bbc6b703 | 686 | __mem_cgroup_uncharge(folio); |
2c8d8f97 SB |
687 | } |
688 | ||
689 | void __mem_cgroup_uncharge_list(struct list_head *page_list); | |
690 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) | |
691 | { | |
692 | if (mem_cgroup_disabled()) | |
693 | return; | |
694 | __mem_cgroup_uncharge_list(page_list); | |
695 | } | |
569b846d | 696 | |
d21bba2b | 697 | void mem_cgroup_migrate(struct folio *old, struct folio *new); |
569b846d | 698 | |
55779ec7 | 699 | /** |
867e5e1d | 700 | * mem_cgroup_lruvec - get the lru list vector for a memcg & node |
55779ec7 | 701 | * @memcg: memcg of the wanted lruvec |
9a1ac228 | 702 | * @pgdat: pglist_data |
55779ec7 | 703 | * |
867e5e1d | 704 | * Returns the lru list vector holding pages for a given @memcg & |
9a1ac228 | 705 | * @pgdat combination. This can be the node lruvec, if the memory |
867e5e1d | 706 | * controller is disabled. |
55779ec7 | 707 | */ |
867e5e1d JW |
708 | static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg, |
709 | struct pglist_data *pgdat) | |
55779ec7 | 710 | { |
ef8f2327 | 711 | struct mem_cgroup_per_node *mz; |
55779ec7 JW |
712 | struct lruvec *lruvec; |
713 | ||
714 | if (mem_cgroup_disabled()) { | |
867e5e1d | 715 | lruvec = &pgdat->__lruvec; |
55779ec7 JW |
716 | goto out; |
717 | } | |
718 | ||
1b05117d JW |
719 | if (!memcg) |
720 | memcg = root_mem_cgroup; | |
721 | ||
a3747b53 | 722 | mz = memcg->nodeinfo[pgdat->node_id]; |
55779ec7 JW |
723 | lruvec = &mz->lruvec; |
724 | out: | |
725 | /* | |
726 | * Since a node can be onlined after the mem_cgroup was created, | |
599d0c95 | 727 | * we have to be prepared to initialize lruvec->pgdat here; |
55779ec7 JW |
728 | * and if offlined then reonlined, we need to reinitialize it. |
729 | */ | |
ef8f2327 MG |
730 | if (unlikely(lruvec->pgdat != pgdat)) |
731 | lruvec->pgdat = pgdat; | |
55779ec7 JW |
732 | return lruvec; |
733 | } | |
734 | ||
9a1ac228 | 735 | /** |
b1baabd9 MWO |
736 | * folio_lruvec - return lruvec for isolating/putting an LRU folio |
737 | * @folio: Pointer to the folio. | |
9a1ac228 | 738 | * |
b1baabd9 | 739 | * This function relies on folio->mem_cgroup being stable. |
9a1ac228 | 740 | */ |
b1baabd9 | 741 | static inline struct lruvec *folio_lruvec(struct folio *folio) |
9a1ac228 | 742 | { |
b1baabd9 | 743 | struct mem_cgroup *memcg = folio_memcg(folio); |
9a1ac228 | 744 | |
b1baabd9 MWO |
745 | VM_WARN_ON_ONCE_FOLIO(!memcg && !mem_cgroup_disabled(), folio); |
746 | return mem_cgroup_lruvec(memcg, folio_pgdat(folio)); | |
9a1ac228 | 747 | } |
c9b0ed51 | 748 | |
64219994 | 749 | struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
e993d905 | 750 | |
d46eb14b SB |
751 | struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm); |
752 | ||
e809c3fe MWO |
753 | struct lruvec *folio_lruvec_lock(struct folio *folio); |
754 | struct lruvec *folio_lruvec_lock_irq(struct folio *folio); | |
755 | struct lruvec *folio_lruvec_lock_irqsave(struct folio *folio, | |
6168d0da AS |
756 | unsigned long *flags); |
757 | ||
758 | #ifdef CONFIG_DEBUG_VM | |
e809c3fe | 759 | void lruvec_memcg_debug(struct lruvec *lruvec, struct folio *folio); |
6168d0da | 760 | #else |
e809c3fe MWO |
761 | static inline |
762 | void lruvec_memcg_debug(struct lruvec *lruvec, struct folio *folio) | |
6168d0da AS |
763 | { |
764 | } | |
765 | #endif | |
766 | ||
33398cf2 MH |
767 | static inline |
768 | struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){ | |
769 | return css ? container_of(css, struct mem_cgroup, css) : NULL; | |
770 | } | |
771 | ||
bf4f0599 RG |
772 | static inline bool obj_cgroup_tryget(struct obj_cgroup *objcg) |
773 | { | |
774 | return percpu_ref_tryget(&objcg->refcnt); | |
775 | } | |
776 | ||
777 | static inline void obj_cgroup_get(struct obj_cgroup *objcg) | |
778 | { | |
779 | percpu_ref_get(&objcg->refcnt); | |
780 | } | |
781 | ||
b4e0b68f MS |
782 | static inline void obj_cgroup_get_many(struct obj_cgroup *objcg, |
783 | unsigned long nr) | |
bf4f0599 | 784 | { |
b4e0b68f | 785 | percpu_ref_get_many(&objcg->refcnt, nr); |
bf4f0599 RG |
786 | } |
787 | ||
b4e0b68f | 788 | static inline void obj_cgroup_put(struct obj_cgroup *objcg) |
bf4f0599 | 789 | { |
b4e0b68f | 790 | percpu_ref_put(&objcg->refcnt); |
bf4f0599 RG |
791 | } |
792 | ||
dc0b5864 RG |
793 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
794 | { | |
d46eb14b SB |
795 | if (memcg) |
796 | css_put(&memcg->css); | |
dc0b5864 RG |
797 | } |
798 | ||
8e8ae645 JW |
799 | #define mem_cgroup_from_counter(counter, member) \ |
800 | container_of(counter, struct mem_cgroup, member) | |
801 | ||
33398cf2 MH |
802 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
803 | struct mem_cgroup *, | |
804 | struct mem_cgroup_reclaim_cookie *); | |
805 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); | |
7c5f64f8 VD |
806 | int mem_cgroup_scan_tasks(struct mem_cgroup *, |
807 | int (*)(struct task_struct *, void *), void *); | |
33398cf2 | 808 | |
23047a96 JW |
809 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
810 | { | |
811 | if (mem_cgroup_disabled()) | |
812 | return 0; | |
813 | ||
73f576c0 | 814 | return memcg->id.id; |
23047a96 | 815 | } |
73f576c0 | 816 | struct mem_cgroup *mem_cgroup_from_id(unsigned short id); |
23047a96 | 817 | |
aa9694bb CD |
818 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
819 | { | |
820 | return mem_cgroup_from_css(seq_css(m)); | |
821 | } | |
822 | ||
2262185c RG |
823 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
824 | { | |
825 | struct mem_cgroup_per_node *mz; | |
826 | ||
827 | if (mem_cgroup_disabled()) | |
828 | return NULL; | |
829 | ||
830 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
831 | return mz->memcg; | |
832 | } | |
833 | ||
8e8ae645 JW |
834 | /** |
835 | * parent_mem_cgroup - find the accounting parent of a memcg | |
836 | * @memcg: memcg whose parent to find | |
837 | * | |
838 | * Returns the parent memcg, or NULL if this is the root or the memory | |
839 | * controller is in legacy no-hierarchy mode. | |
840 | */ | |
841 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) | |
842 | { | |
843 | if (!memcg->memory.parent) | |
844 | return NULL; | |
845 | return mem_cgroup_from_counter(memcg->memory.parent, memory); | |
846 | } | |
847 | ||
33398cf2 MH |
848 | static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, |
849 | struct mem_cgroup *root) | |
850 | { | |
851 | if (root == memcg) | |
852 | return true; | |
33398cf2 MH |
853 | return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup); |
854 | } | |
e1aab161 | 855 | |
2314b42d JW |
856 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
857 | struct mem_cgroup *memcg) | |
2e4d4091 | 858 | { |
587af308 | 859 | struct mem_cgroup *task_memcg; |
413918bb | 860 | bool match = false; |
c3ac9a8a | 861 | |
2e4d4091 | 862 | rcu_read_lock(); |
587af308 | 863 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
413918bb | 864 | if (task_memcg) |
2314b42d | 865 | match = mem_cgroup_is_descendant(task_memcg, memcg); |
2e4d4091 | 866 | rcu_read_unlock(); |
c3ac9a8a | 867 | return match; |
2e4d4091 | 868 | } |
8a9f3ccd | 869 | |
64219994 | 870 | struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page); |
2fc04524 | 871 | ino_t page_cgroup_ino(struct page *page); |
d324236b | 872 | |
eb01aaab VD |
873 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
874 | { | |
875 | if (mem_cgroup_disabled()) | |
876 | return true; | |
877 | return !!(memcg->css.flags & CSS_ONLINE); | |
878 | } | |
879 | ||
33398cf2 | 880 | void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, |
b4536f0c | 881 | int zid, int nr_pages); |
33398cf2 | 882 | |
b4536f0c MH |
883 | static inline |
884 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
885 | enum lru_list lru, int zone_idx) | |
886 | { | |
887 | struct mem_cgroup_per_node *mz; | |
888 | ||
889 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
e0e3f42f | 890 | return READ_ONCE(mz->lru_zone_size[zone_idx][lru]); |
33398cf2 MH |
891 | } |
892 | ||
b23afb93 TH |
893 | void mem_cgroup_handle_over_high(void); |
894 | ||
bbec2e15 | 895 | unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg); |
7c5f64f8 | 896 | |
9783aa99 CD |
897 | unsigned long mem_cgroup_size(struct mem_cgroup *memcg); |
898 | ||
f0c867d9 | 899 | void mem_cgroup_print_oom_context(struct mem_cgroup *memcg, |
64219994 | 900 | struct task_struct *p); |
58ae83db | 901 | |
f0c867d9 | 902 | void mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg); |
903 | ||
29ef680a | 904 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 | 905 | { |
29ef680a MH |
906 | WARN_ON(current->in_user_fault); |
907 | current->in_user_fault = 1; | |
519e5247 JW |
908 | } |
909 | ||
29ef680a | 910 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 | 911 | { |
29ef680a MH |
912 | WARN_ON(!current->in_user_fault); |
913 | current->in_user_fault = 0; | |
519e5247 JW |
914 | } |
915 | ||
3812c8c8 JW |
916 | static inline bool task_in_memcg_oom(struct task_struct *p) |
917 | { | |
626ebc41 | 918 | return p->memcg_in_oom; |
3812c8c8 JW |
919 | } |
920 | ||
49426420 | 921 | bool mem_cgroup_oom_synchronize(bool wait); |
3d8b38eb RG |
922 | struct mem_cgroup *mem_cgroup_get_oom_group(struct task_struct *victim, |
923 | struct mem_cgroup *oom_domain); | |
924 | void mem_cgroup_print_oom_group(struct mem_cgroup *memcg); | |
3812c8c8 | 925 | |
c255a458 | 926 | #ifdef CONFIG_MEMCG_SWAP |
eccb52e7 | 927 | extern bool cgroup_memory_noswap; |
c077719b | 928 | #endif |
f8d66542 | 929 | |
f70ad448 MWO |
930 | void folio_memcg_lock(struct folio *folio); |
931 | void folio_memcg_unlock(struct folio *folio); | |
1c824a68 | 932 | void lock_page_memcg(struct page *page); |
62cccb8c | 933 | void unlock_page_memcg(struct page *page); |
d7365e78 | 934 | |
db9adbcb | 935 | void __mod_memcg_state(struct mem_cgroup *memcg, int idx, int val); |
2a2e4885 | 936 | |
04fecbf5 | 937 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 938 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 939 | int idx, int val) |
2a2e4885 | 940 | { |
c3cc3911 JW |
941 | unsigned long flags; |
942 | ||
943 | local_irq_save(flags); | |
a983b5eb | 944 | __mod_memcg_state(memcg, idx, val); |
c3cc3911 | 945 | local_irq_restore(flags); |
2a2e4885 JW |
946 | } |
947 | ||
4e5aa1f4 SB |
948 | static inline void mod_memcg_page_state(struct page *page, |
949 | int idx, int val) | |
950 | { | |
951 | struct mem_cgroup *memcg; | |
952 | ||
953 | if (mem_cgroup_disabled()) | |
954 | return; | |
955 | ||
956 | rcu_read_lock(); | |
957 | memcg = page_memcg(page); | |
958 | if (memcg) | |
959 | mod_memcg_state(memcg, idx, val); | |
960 | rcu_read_unlock(); | |
961 | } | |
962 | ||
7490a2d2 SB |
963 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx) |
964 | { | |
96e51ccf | 965 | return READ_ONCE(memcg->vmstats.state[idx]); |
7490a2d2 SB |
966 | } |
967 | ||
42a30035 JW |
968 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
969 | enum node_stat_item idx) | |
970 | { | |
971 | struct mem_cgroup_per_node *pn; | |
42a30035 JW |
972 | |
973 | if (mem_cgroup_disabled()) | |
974 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
975 | ||
976 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
96e51ccf | 977 | return READ_ONCE(pn->lruvec_stats.state[idx]); |
42a30035 JW |
978 | } |
979 | ||
205b20cc JW |
980 | static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
981 | enum node_stat_item idx) | |
2a7106f2 | 982 | { |
00f3ca2c | 983 | struct mem_cgroup_per_node *pn; |
815744d7 JW |
984 | long x = 0; |
985 | int cpu; | |
00f3ca2c JW |
986 | |
987 | if (mem_cgroup_disabled()) | |
988 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
989 | ||
990 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
815744d7 | 991 | for_each_possible_cpu(cpu) |
7e1c0d6f | 992 | x += per_cpu(pn->lruvec_stats_percpu->state[idx], cpu); |
a983b5eb JW |
993 | #ifdef CONFIG_SMP |
994 | if (x < 0) | |
995 | x = 0; | |
996 | #endif | |
997 | return x; | |
2a7106f2 GT |
998 | } |
999 | ||
aa48e47e SB |
1000 | void mem_cgroup_flush_stats(void); |
1001 | ||
eedc4e5a RG |
1002 | void __mod_memcg_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx, |
1003 | int val); | |
da3ceeff | 1004 | void __mod_lruvec_kmem_state(void *p, enum node_stat_item idx, int val); |
991e7673 | 1005 | |
da3ceeff | 1006 | static inline void mod_lruvec_kmem_state(void *p, enum node_stat_item idx, |
991e7673 SB |
1007 | int val) |
1008 | { | |
1009 | unsigned long flags; | |
1010 | ||
1011 | local_irq_save(flags); | |
da3ceeff | 1012 | __mod_lruvec_kmem_state(p, idx, val); |
991e7673 SB |
1013 | local_irq_restore(flags); |
1014 | } | |
1015 | ||
eedc4e5a RG |
1016 | static inline void mod_memcg_lruvec_state(struct lruvec *lruvec, |
1017 | enum node_stat_item idx, int val) | |
1018 | { | |
1019 | unsigned long flags; | |
1020 | ||
1021 | local_irq_save(flags); | |
1022 | __mod_memcg_lruvec_state(lruvec, idx, val); | |
1023 | local_irq_restore(flags); | |
1024 | } | |
1025 | ||
db9adbcb JW |
1026 | void __count_memcg_events(struct mem_cgroup *memcg, enum vm_event_item idx, |
1027 | unsigned long count); | |
c9019e9b | 1028 | |
2262185c | 1029 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
e27be240 JW |
1030 | enum vm_event_item idx, |
1031 | unsigned long count) | |
2262185c | 1032 | { |
c3cc3911 JW |
1033 | unsigned long flags; |
1034 | ||
1035 | local_irq_save(flags); | |
a983b5eb | 1036 | __count_memcg_events(memcg, idx, count); |
c3cc3911 | 1037 | local_irq_restore(flags); |
2262185c RG |
1038 | } |
1039 | ||
1040 | static inline void count_memcg_page_event(struct page *page, | |
e27be240 | 1041 | enum vm_event_item idx) |
2262185c | 1042 | { |
bcfe06bf RG |
1043 | struct mem_cgroup *memcg = page_memcg(page); |
1044 | ||
1045 | if (memcg) | |
1046 | count_memcg_events(memcg, idx, 1); | |
2262185c RG |
1047 | } |
1048 | ||
1049 | static inline void count_memcg_event_mm(struct mm_struct *mm, | |
1050 | enum vm_event_item idx) | |
68ae564b | 1051 | { |
33398cf2 MH |
1052 | struct mem_cgroup *memcg; |
1053 | ||
68ae564b DR |
1054 | if (mem_cgroup_disabled()) |
1055 | return; | |
33398cf2 MH |
1056 | |
1057 | rcu_read_lock(); | |
1058 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
fe6bdfc8 | 1059 | if (likely(memcg)) |
c9019e9b | 1060 | count_memcg_events(memcg, idx, 1); |
33398cf2 | 1061 | rcu_read_unlock(); |
68ae564b | 1062 | } |
c9019e9b | 1063 | |
e27be240 JW |
1064 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
1065 | enum memcg_memory_event event) | |
c9019e9b | 1066 | { |
8b21ca02 MS |
1067 | bool swap_event = event == MEMCG_SWAP_HIGH || event == MEMCG_SWAP_MAX || |
1068 | event == MEMCG_SWAP_FAIL; | |
1069 | ||
1e577f97 | 1070 | atomic_long_inc(&memcg->memory_events_local[event]); |
8b21ca02 MS |
1071 | if (!swap_event) |
1072 | cgroup_file_notify(&memcg->events_local_file); | |
1e577f97 | 1073 | |
9852ae3f CD |
1074 | do { |
1075 | atomic_long_inc(&memcg->memory_events[event]); | |
8b21ca02 MS |
1076 | if (swap_event) |
1077 | cgroup_file_notify(&memcg->swap_events_file); | |
1078 | else | |
1079 | cgroup_file_notify(&memcg->events_file); | |
9852ae3f | 1080 | |
04fd61a4 YS |
1081 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys)) |
1082 | break; | |
9852ae3f CD |
1083 | if (cgrp_dfl_root.flags & CGRP_ROOT_MEMORY_LOCAL_EVENTS) |
1084 | break; | |
1085 | } while ((memcg = parent_mem_cgroup(memcg)) && | |
1086 | !mem_cgroup_is_root(memcg)); | |
c9019e9b JW |
1087 | } |
1088 | ||
fe6bdfc8 RG |
1089 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
1090 | enum memcg_memory_event event) | |
1091 | { | |
1092 | struct mem_cgroup *memcg; | |
1093 | ||
1094 | if (mem_cgroup_disabled()) | |
1095 | return; | |
1096 | ||
1097 | rcu_read_lock(); | |
1098 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
1099 | if (likely(memcg)) | |
1100 | memcg_memory_event(memcg, event); | |
1101 | rcu_read_unlock(); | |
1102 | } | |
1103 | ||
be6c8982 | 1104 | void split_page_memcg(struct page *head, unsigned int nr); |
ca3e0214 | 1105 | |
2d146aa3 JW |
1106 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
1107 | gfp_t gfp_mask, | |
1108 | unsigned long *total_scanned); | |
1109 | ||
c255a458 | 1110 | #else /* CONFIG_MEMCG */ |
23047a96 JW |
1111 | |
1112 | #define MEM_CGROUP_ID_SHIFT 0 | |
1113 | #define MEM_CGROUP_ID_MAX 0 | |
1114 | ||
1b7e4464 MWO |
1115 | static inline struct mem_cgroup *folio_memcg(struct folio *folio) |
1116 | { | |
1117 | return NULL; | |
1118 | } | |
1119 | ||
bcfe06bf RG |
1120 | static inline struct mem_cgroup *page_memcg(struct page *page) |
1121 | { | |
1122 | return NULL; | |
1123 | } | |
1124 | ||
c5ce619a | 1125 | static inline struct mem_cgroup *folio_memcg_rcu(struct folio *folio) |
bcfe06bf RG |
1126 | { |
1127 | WARN_ON_ONCE(!rcu_read_lock_held()); | |
1128 | return NULL; | |
1129 | } | |
1130 | ||
1131 | static inline struct mem_cgroup *page_memcg_check(struct page *page) | |
1132 | { | |
1133 | return NULL; | |
1134 | } | |
1135 | ||
1b7e4464 MWO |
1136 | static inline bool folio_memcg_kmem(struct folio *folio) |
1137 | { | |
1138 | return false; | |
1139 | } | |
1140 | ||
18b2db3b RG |
1141 | static inline bool PageMemcgKmem(struct page *page) |
1142 | { | |
1143 | return false; | |
1144 | } | |
1145 | ||
dfd2f10c KT |
1146 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
1147 | { | |
1148 | return true; | |
1149 | } | |
1150 | ||
23047a96 JW |
1151 | static inline bool mem_cgroup_disabled(void) |
1152 | { | |
1153 | return true; | |
1154 | } | |
1155 | ||
e27be240 JW |
1156 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
1157 | enum memcg_memory_event event) | |
241994ed JW |
1158 | { |
1159 | } | |
1160 | ||
fe6bdfc8 RG |
1161 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
1162 | enum memcg_memory_event event) | |
1163 | { | |
1164 | } | |
1165 | ||
f56ce412 JW |
1166 | static inline void mem_cgroup_protection(struct mem_cgroup *root, |
1167 | struct mem_cgroup *memcg, | |
1168 | unsigned long *min, | |
1169 | unsigned long *low) | |
9783aa99 | 1170 | { |
f56ce412 | 1171 | *min = *low = 0; |
9783aa99 CD |
1172 | } |
1173 | ||
45c7f7e1 CD |
1174 | static inline void mem_cgroup_calculate_protection(struct mem_cgroup *root, |
1175 | struct mem_cgroup *memcg) | |
1176 | { | |
1177 | } | |
1178 | ||
1179 | static inline bool mem_cgroup_below_low(struct mem_cgroup *memcg) | |
1180 | { | |
1181 | return false; | |
1182 | } | |
1183 | ||
1184 | static inline bool mem_cgroup_below_min(struct mem_cgroup *memcg) | |
241994ed | 1185 | { |
45c7f7e1 | 1186 | return false; |
241994ed JW |
1187 | } |
1188 | ||
8f425e4e MWO |
1189 | static inline int mem_cgroup_charge(struct folio *folio, |
1190 | struct mm_struct *mm, gfp_t gfp) | |
3fea5a49 JW |
1191 | { |
1192 | return 0; | |
1193 | } | |
1194 | ||
0add0c77 SB |
1195 | static inline int mem_cgroup_swapin_charge_page(struct page *page, |
1196 | struct mm_struct *mm, gfp_t gfp, swp_entry_t entry) | |
1197 | { | |
1198 | return 0; | |
1199 | } | |
1200 | ||
1201 | static inline void mem_cgroup_swapin_uncharge_swap(swp_entry_t entry) | |
1202 | { | |
1203 | } | |
1204 | ||
bbc6b703 | 1205 | static inline void mem_cgroup_uncharge(struct folio *folio) |
569b846d KH |
1206 | { |
1207 | } | |
1208 | ||
747db954 | 1209 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
8a9f3ccd BS |
1210 | { |
1211 | } | |
1212 | ||
d21bba2b | 1213 | static inline void mem_cgroup_migrate(struct folio *old, struct folio *new) |
69029cd5 KH |
1214 | { |
1215 | } | |
1216 | ||
867e5e1d JW |
1217 | static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg, |
1218 | struct pglist_data *pgdat) | |
08e552c6 | 1219 | { |
867e5e1d | 1220 | return &pgdat->__lruvec; |
08e552c6 KH |
1221 | } |
1222 | ||
b1baabd9 | 1223 | static inline struct lruvec *folio_lruvec(struct folio *folio) |
66e1707b | 1224 | { |
b1baabd9 | 1225 | struct pglist_data *pgdat = folio_pgdat(folio); |
867e5e1d | 1226 | return &pgdat->__lruvec; |
66e1707b BS |
1227 | } |
1228 | ||
e809c3fe MWO |
1229 | static inline |
1230 | void lruvec_memcg_debug(struct lruvec *lruvec, struct folio *folio) | |
2d146aa3 JW |
1231 | { |
1232 | } | |
1233 | ||
b910718a JW |
1234 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) |
1235 | { | |
1236 | return NULL; | |
1237 | } | |
1238 | ||
587af308 | 1239 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
c0ff4b85 | 1240 | struct mem_cgroup *memcg) |
bed7161a | 1241 | { |
587af308 | 1242 | return true; |
bed7161a BS |
1243 | } |
1244 | ||
d46eb14b SB |
1245 | static inline struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm) |
1246 | { | |
1247 | return NULL; | |
1248 | } | |
1249 | ||
c74d40e8 DS |
1250 | static inline |
1251 | struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css) | |
1252 | { | |
1253 | return NULL; | |
1254 | } | |
1255 | ||
dc0b5864 RG |
1256 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
1257 | { | |
1258 | } | |
1259 | ||
e809c3fe | 1260 | static inline struct lruvec *folio_lruvec_lock(struct folio *folio) |
6168d0da | 1261 | { |
e809c3fe | 1262 | struct pglist_data *pgdat = folio_pgdat(folio); |
6168d0da AS |
1263 | |
1264 | spin_lock(&pgdat->__lruvec.lru_lock); | |
1265 | return &pgdat->__lruvec; | |
1266 | } | |
1267 | ||
e809c3fe | 1268 | static inline struct lruvec *folio_lruvec_lock_irq(struct folio *folio) |
6168d0da | 1269 | { |
e809c3fe | 1270 | struct pglist_data *pgdat = folio_pgdat(folio); |
6168d0da AS |
1271 | |
1272 | spin_lock_irq(&pgdat->__lruvec.lru_lock); | |
1273 | return &pgdat->__lruvec; | |
1274 | } | |
1275 | ||
e809c3fe | 1276 | static inline struct lruvec *folio_lruvec_lock_irqsave(struct folio *folio, |
6168d0da AS |
1277 | unsigned long *flagsp) |
1278 | { | |
e809c3fe | 1279 | struct pglist_data *pgdat = folio_pgdat(folio); |
6168d0da AS |
1280 | |
1281 | spin_lock_irqsave(&pgdat->__lruvec.lru_lock, *flagsp); | |
1282 | return &pgdat->__lruvec; | |
1283 | } | |
1284 | ||
5660048c JW |
1285 | static inline struct mem_cgroup * |
1286 | mem_cgroup_iter(struct mem_cgroup *root, | |
1287 | struct mem_cgroup *prev, | |
1288 | struct mem_cgroup_reclaim_cookie *reclaim) | |
1289 | { | |
1290 | return NULL; | |
1291 | } | |
1292 | ||
1293 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
1294 | struct mem_cgroup *prev) | |
1295 | { | |
1296 | } | |
1297 | ||
7c5f64f8 VD |
1298 | static inline int mem_cgroup_scan_tasks(struct mem_cgroup *memcg, |
1299 | int (*fn)(struct task_struct *, void *), void *arg) | |
1300 | { | |
1301 | return 0; | |
1302 | } | |
1303 | ||
23047a96 | 1304 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
f8d66542 | 1305 | { |
23047a96 JW |
1306 | return 0; |
1307 | } | |
1308 | ||
1309 | static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id) | |
1310 | { | |
1311 | WARN_ON_ONCE(id); | |
1312 | /* XXX: This should always return root_mem_cgroup */ | |
1313 | return NULL; | |
f8d66542 | 1314 | } |
a636b327 | 1315 | |
aa9694bb CD |
1316 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
1317 | { | |
1318 | return NULL; | |
1319 | } | |
1320 | ||
2262185c RG |
1321 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
1322 | { | |
1323 | return NULL; | |
1324 | } | |
1325 | ||
eb01aaab | 1326 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
14797e23 | 1327 | { |
13308ca9 | 1328 | return true; |
14797e23 KM |
1329 | } |
1330 | ||
b4536f0c MH |
1331 | static inline |
1332 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
1333 | enum lru_list lru, int zone_idx) | |
1334 | { | |
1335 | return 0; | |
1336 | } | |
a3d8e054 | 1337 | |
bbec2e15 | 1338 | static inline unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg) |
7c5f64f8 VD |
1339 | { |
1340 | return 0; | |
1341 | } | |
1342 | ||
9783aa99 CD |
1343 | static inline unsigned long mem_cgroup_size(struct mem_cgroup *memcg) |
1344 | { | |
1345 | return 0; | |
1346 | } | |
1347 | ||
e222432b | 1348 | static inline void |
f0c867d9 | 1349 | mem_cgroup_print_oom_context(struct mem_cgroup *memcg, struct task_struct *p) |
1350 | { | |
1351 | } | |
1352 | ||
1353 | static inline void | |
1354 | mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg) | |
e222432b BS |
1355 | { |
1356 | } | |
1357 | ||
1c824a68 | 1358 | static inline void lock_page_memcg(struct page *page) |
89c06bd5 KH |
1359 | { |
1360 | } | |
1361 | ||
62cccb8c | 1362 | static inline void unlock_page_memcg(struct page *page) |
89c06bd5 KH |
1363 | { |
1364 | } | |
1365 | ||
f70ad448 MWO |
1366 | static inline void folio_memcg_lock(struct folio *folio) |
1367 | { | |
1368 | } | |
1369 | ||
1370 | static inline void folio_memcg_unlock(struct folio *folio) | |
1371 | { | |
1372 | } | |
1373 | ||
b23afb93 TH |
1374 | static inline void mem_cgroup_handle_over_high(void) |
1375 | { | |
1376 | } | |
1377 | ||
29ef680a | 1378 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 JW |
1379 | { |
1380 | } | |
1381 | ||
29ef680a | 1382 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 JW |
1383 | { |
1384 | } | |
1385 | ||
3812c8c8 JW |
1386 | static inline bool task_in_memcg_oom(struct task_struct *p) |
1387 | { | |
1388 | return false; | |
1389 | } | |
1390 | ||
49426420 | 1391 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
3812c8c8 JW |
1392 | { |
1393 | return false; | |
1394 | } | |
1395 | ||
3d8b38eb RG |
1396 | static inline struct mem_cgroup *mem_cgroup_get_oom_group( |
1397 | struct task_struct *victim, struct mem_cgroup *oom_domain) | |
1398 | { | |
1399 | return NULL; | |
1400 | } | |
1401 | ||
1402 | static inline void mem_cgroup_print_oom_group(struct mem_cgroup *memcg) | |
1403 | { | |
1404 | } | |
1405 | ||
00f3ca2c | 1406 | static inline void __mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1407 | int idx, |
00f3ca2c | 1408 | int nr) |
2a2e4885 JW |
1409 | { |
1410 | } | |
1411 | ||
00f3ca2c | 1412 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1413 | int idx, |
00f3ca2c | 1414 | int nr) |
2a2e4885 JW |
1415 | { |
1416 | } | |
1417 | ||
4e5aa1f4 SB |
1418 | static inline void mod_memcg_page_state(struct page *page, |
1419 | int idx, int val) | |
1420 | { | |
1421 | } | |
1422 | ||
7490a2d2 SB |
1423 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx) |
1424 | { | |
1425 | return 0; | |
1426 | } | |
1427 | ||
42a30035 JW |
1428 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
1429 | enum node_stat_item idx) | |
1430 | { | |
1431 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
1432 | } | |
1433 | ||
205b20cc JW |
1434 | static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
1435 | enum node_stat_item idx) | |
2a7106f2 | 1436 | { |
00f3ca2c | 1437 | return node_page_state(lruvec_pgdat(lruvec), idx); |
2a7106f2 GT |
1438 | } |
1439 | ||
aa48e47e SB |
1440 | static inline void mem_cgroup_flush_stats(void) |
1441 | { | |
1442 | } | |
1443 | ||
eedc4e5a RG |
1444 | static inline void __mod_memcg_lruvec_state(struct lruvec *lruvec, |
1445 | enum node_stat_item idx, int val) | |
1446 | { | |
1447 | } | |
1448 | ||
da3ceeff | 1449 | static inline void __mod_lruvec_kmem_state(void *p, enum node_stat_item idx, |
ec9f0238 RG |
1450 | int val) |
1451 | { | |
1452 | struct page *page = virt_to_head_page(p); | |
1453 | ||
1454 | __mod_node_page_state(page_pgdat(page), idx, val); | |
1455 | } | |
1456 | ||
da3ceeff | 1457 | static inline void mod_lruvec_kmem_state(void *p, enum node_stat_item idx, |
991e7673 SB |
1458 | int val) |
1459 | { | |
1460 | struct page *page = virt_to_head_page(p); | |
1461 | ||
1462 | mod_node_page_state(page_pgdat(page), idx, val); | |
1463 | } | |
1464 | ||
2262185c RG |
1465 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
1466 | enum vm_event_item idx, | |
1467 | unsigned long count) | |
1468 | { | |
1469 | } | |
1470 | ||
9851ac13 KT |
1471 | static inline void __count_memcg_events(struct mem_cgroup *memcg, |
1472 | enum vm_event_item idx, | |
1473 | unsigned long count) | |
1474 | { | |
1475 | } | |
1476 | ||
2262185c | 1477 | static inline void count_memcg_page_event(struct page *page, |
04fecbf5 | 1478 | int idx) |
2262185c RG |
1479 | { |
1480 | } | |
1481 | ||
456f998e | 1482 | static inline |
2262185c | 1483 | void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx) |
456f998e YH |
1484 | { |
1485 | } | |
6168d0da | 1486 | |
2d146aa3 JW |
1487 | static inline void split_page_memcg(struct page *head, unsigned int nr) |
1488 | { | |
1489 | } | |
1490 | ||
1491 | static inline | |
1492 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, | |
1493 | gfp_t gfp_mask, | |
1494 | unsigned long *total_scanned) | |
6168d0da | 1495 | { |
2d146aa3 | 1496 | return 0; |
6168d0da | 1497 | } |
c255a458 | 1498 | #endif /* CONFIG_MEMCG */ |
78fb7466 | 1499 | |
da3ceeff | 1500 | static inline void __inc_lruvec_kmem_state(void *p, enum node_stat_item idx) |
ec9f0238 | 1501 | { |
da3ceeff | 1502 | __mod_lruvec_kmem_state(p, idx, 1); |
ec9f0238 RG |
1503 | } |
1504 | ||
da3ceeff | 1505 | static inline void __dec_lruvec_kmem_state(void *p, enum node_stat_item idx) |
ec9f0238 | 1506 | { |
da3ceeff | 1507 | __mod_lruvec_kmem_state(p, idx, -1); |
ec9f0238 RG |
1508 | } |
1509 | ||
7cf111bc JW |
1510 | static inline struct lruvec *parent_lruvec(struct lruvec *lruvec) |
1511 | { | |
1512 | struct mem_cgroup *memcg; | |
1513 | ||
1514 | memcg = lruvec_memcg(lruvec); | |
1515 | if (!memcg) | |
1516 | return NULL; | |
1517 | memcg = parent_mem_cgroup(memcg); | |
1518 | if (!memcg) | |
1519 | return NULL; | |
1520 | return mem_cgroup_lruvec(memcg, lruvec_pgdat(lruvec)); | |
1521 | } | |
1522 | ||
6168d0da AS |
1523 | static inline void unlock_page_lruvec(struct lruvec *lruvec) |
1524 | { | |
1525 | spin_unlock(&lruvec->lru_lock); | |
1526 | } | |
1527 | ||
1528 | static inline void unlock_page_lruvec_irq(struct lruvec *lruvec) | |
1529 | { | |
1530 | spin_unlock_irq(&lruvec->lru_lock); | |
1531 | } | |
1532 | ||
1533 | static inline void unlock_page_lruvec_irqrestore(struct lruvec *lruvec, | |
1534 | unsigned long flags) | |
1535 | { | |
1536 | spin_unlock_irqrestore(&lruvec->lru_lock, flags); | |
1537 | } | |
1538 | ||
7467c391 | 1539 | /* Test requires a stable page->memcg binding, see page_memcg() */ |
0de340cb MWO |
1540 | static inline bool folio_matches_lruvec(struct folio *folio, |
1541 | struct lruvec *lruvec) | |
f2e4d28d | 1542 | { |
0de340cb MWO |
1543 | return lruvec_pgdat(lruvec) == folio_pgdat(folio) && |
1544 | lruvec_memcg(lruvec) == folio_memcg(folio); | |
f2e4d28d MS |
1545 | } |
1546 | ||
2a5e4e34 | 1547 | /* Don't lock again iff page's lruvec locked */ |
0de340cb | 1548 | static inline struct lruvec *folio_lruvec_relock_irq(struct folio *folio, |
2a5e4e34 AD |
1549 | struct lruvec *locked_lruvec) |
1550 | { | |
1551 | if (locked_lruvec) { | |
0de340cb | 1552 | if (folio_matches_lruvec(folio, locked_lruvec)) |
2a5e4e34 AD |
1553 | return locked_lruvec; |
1554 | ||
1555 | unlock_page_lruvec_irq(locked_lruvec); | |
1556 | } | |
1557 | ||
e809c3fe | 1558 | return folio_lruvec_lock_irq(folio); |
2a5e4e34 AD |
1559 | } |
1560 | ||
1561 | /* Don't lock again iff page's lruvec locked */ | |
0de340cb | 1562 | static inline struct lruvec *folio_lruvec_relock_irqsave(struct folio *folio, |
2a5e4e34 AD |
1563 | struct lruvec *locked_lruvec, unsigned long *flags) |
1564 | { | |
1565 | if (locked_lruvec) { | |
0de340cb | 1566 | if (folio_matches_lruvec(folio, locked_lruvec)) |
2a5e4e34 AD |
1567 | return locked_lruvec; |
1568 | ||
1569 | unlock_page_lruvec_irqrestore(locked_lruvec, *flags); | |
1570 | } | |
1571 | ||
e809c3fe | 1572 | return folio_lruvec_lock_irqsave(folio, flags); |
2a5e4e34 AD |
1573 | } |
1574 | ||
52ebea74 | 1575 | #ifdef CONFIG_CGROUP_WRITEBACK |
841710aa | 1576 | |
841710aa | 1577 | struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb); |
c5edf9cd TH |
1578 | void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages, |
1579 | unsigned long *pheadroom, unsigned long *pdirty, | |
1580 | unsigned long *pwriteback); | |
841710aa | 1581 | |
9d8053fc | 1582 | void mem_cgroup_track_foreign_dirty_slowpath(struct folio *folio, |
97b27821 TH |
1583 | struct bdi_writeback *wb); |
1584 | ||
203a3151 | 1585 | static inline void mem_cgroup_track_foreign_dirty(struct folio *folio, |
97b27821 TH |
1586 | struct bdi_writeback *wb) |
1587 | { | |
08d1d0e6 BH |
1588 | if (mem_cgroup_disabled()) |
1589 | return; | |
1590 | ||
9d8053fc MWO |
1591 | if (unlikely(&folio_memcg(folio)->css != wb->memcg_css)) |
1592 | mem_cgroup_track_foreign_dirty_slowpath(folio, wb); | |
97b27821 TH |
1593 | } |
1594 | ||
1595 | void mem_cgroup_flush_foreign(struct bdi_writeback *wb); | |
1596 | ||
841710aa TH |
1597 | #else /* CONFIG_CGROUP_WRITEBACK */ |
1598 | ||
1599 | static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb) | |
1600 | { | |
1601 | return NULL; | |
1602 | } | |
1603 | ||
c2aa723a | 1604 | static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb, |
c5edf9cd TH |
1605 | unsigned long *pfilepages, |
1606 | unsigned long *pheadroom, | |
c2aa723a TH |
1607 | unsigned long *pdirty, |
1608 | unsigned long *pwriteback) | |
1609 | { | |
1610 | } | |
1611 | ||
203a3151 | 1612 | static inline void mem_cgroup_track_foreign_dirty(struct folio *folio, |
97b27821 TH |
1613 | struct bdi_writeback *wb) |
1614 | { | |
1615 | } | |
1616 | ||
1617 | static inline void mem_cgroup_flush_foreign(struct bdi_writeback *wb) | |
1618 | { | |
1619 | } | |
1620 | ||
841710aa | 1621 | #endif /* CONFIG_CGROUP_WRITEBACK */ |
52ebea74 | 1622 | |
e1aab161 | 1623 | struct sock; |
4b1327be WW |
1624 | bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages, |
1625 | gfp_t gfp_mask); | |
baac50bb | 1626 | void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); |
d886f4e4 | 1627 | #ifdef CONFIG_MEMCG |
ef12947c JW |
1628 | extern struct static_key_false memcg_sockets_enabled_key; |
1629 | #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key) | |
2d758073 JW |
1630 | void mem_cgroup_sk_alloc(struct sock *sk); |
1631 | void mem_cgroup_sk_free(struct sock *sk); | |
baac50bb | 1632 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c | 1633 | { |
0db15298 | 1634 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && memcg->tcpmem_pressure) |
8e8ae645 | 1635 | return true; |
8e8ae645 | 1636 | do { |
7e6ec49c | 1637 | if (time_before(jiffies, READ_ONCE(memcg->socket_pressure))) |
8e8ae645 JW |
1638 | return true; |
1639 | } while ((memcg = parent_mem_cgroup(memcg))); | |
1640 | return false; | |
e805605c | 1641 | } |
0a432dcb | 1642 | |
e4262c4f YS |
1643 | int alloc_shrinker_info(struct mem_cgroup *memcg); |
1644 | void free_shrinker_info(struct mem_cgroup *memcg); | |
2bfd3637 | 1645 | void set_shrinker_bit(struct mem_cgroup *memcg, int nid, int shrinker_id); |
a178015c | 1646 | void reparent_shrinker_deferred(struct mem_cgroup *memcg); |
e805605c | 1647 | #else |
80e95fe0 | 1648 | #define mem_cgroup_sockets_enabled 0 |
2d758073 JW |
1649 | static inline void mem_cgroup_sk_alloc(struct sock *sk) { }; |
1650 | static inline void mem_cgroup_sk_free(struct sock *sk) { }; | |
baac50bb | 1651 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c JW |
1652 | { |
1653 | return false; | |
1654 | } | |
0a432dcb | 1655 | |
2bfd3637 YS |
1656 | static inline void set_shrinker_bit(struct mem_cgroup *memcg, |
1657 | int nid, int shrinker_id) | |
0a432dcb YS |
1658 | { |
1659 | } | |
e805605c | 1660 | #endif |
7ae1e1d0 | 1661 | |
9b6f7e16 | 1662 | #ifdef CONFIG_MEMCG_KMEM |
4d5c8aed | 1663 | bool mem_cgroup_kmem_disabled(void); |
f4b00eab RG |
1664 | int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, int order); |
1665 | void __memcg_kmem_uncharge_page(struct page *page, int order); | |
45264778 | 1666 | |
bf4f0599 RG |
1667 | struct obj_cgroup *get_obj_cgroup_from_current(void); |
1668 | ||
1669 | int obj_cgroup_charge(struct obj_cgroup *objcg, gfp_t gfp, size_t size); | |
1670 | void obj_cgroup_uncharge(struct obj_cgroup *objcg, size_t size); | |
1671 | ||
ef12947c | 1672 | extern struct static_key_false memcg_kmem_enabled_key; |
749c5415 | 1673 | |
dbcf73e2 | 1674 | extern int memcg_nr_cache_ids; |
64219994 MH |
1675 | void memcg_get_cache_ids(void); |
1676 | void memcg_put_cache_ids(void); | |
ebe945c2 GC |
1677 | |
1678 | /* | |
1679 | * Helper macro to loop through all memcg-specific caches. Callers must still | |
1680 | * check if the cache is valid (it is either valid or NULL). | |
1681 | * the slab_mutex must be held when looping through those caches | |
1682 | */ | |
749c5415 | 1683 | #define for_each_memcg_cache_index(_idx) \ |
dbcf73e2 | 1684 | for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++) |
749c5415 | 1685 | |
7ae1e1d0 GC |
1686 | static inline bool memcg_kmem_enabled(void) |
1687 | { | |
eda330e5 | 1688 | return static_branch_likely(&memcg_kmem_enabled_key); |
7ae1e1d0 GC |
1689 | } |
1690 | ||
f4b00eab RG |
1691 | static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1692 | int order) | |
60cd4bcd SB |
1693 | { |
1694 | if (memcg_kmem_enabled()) | |
f4b00eab | 1695 | return __memcg_kmem_charge_page(page, gfp, order); |
60cd4bcd SB |
1696 | return 0; |
1697 | } | |
1698 | ||
f4b00eab | 1699 | static inline void memcg_kmem_uncharge_page(struct page *page, int order) |
60cd4bcd SB |
1700 | { |
1701 | if (memcg_kmem_enabled()) | |
f4b00eab | 1702 | __memcg_kmem_uncharge_page(page, order); |
60cd4bcd SB |
1703 | } |
1704 | ||
33398cf2 | 1705 | /* |
a7cb874b RG |
1706 | * A helper for accessing memcg's kmem_id, used for getting |
1707 | * corresponding LRU lists. | |
33398cf2 MH |
1708 | */ |
1709 | static inline int memcg_cache_id(struct mem_cgroup *memcg) | |
1710 | { | |
1711 | return memcg ? memcg->kmemcg_id : -1; | |
1712 | } | |
5722d094 | 1713 | |
8380ce47 RG |
1714 | struct mem_cgroup *mem_cgroup_from_obj(void *p); |
1715 | ||
7ae1e1d0 | 1716 | #else |
4d5c8aed RG |
1717 | static inline bool mem_cgroup_kmem_disabled(void) |
1718 | { | |
1719 | return true; | |
1720 | } | |
9b6f7e16 | 1721 | |
f4b00eab RG |
1722 | static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1723 | int order) | |
9b6f7e16 RG |
1724 | { |
1725 | return 0; | |
1726 | } | |
1727 | ||
f4b00eab | 1728 | static inline void memcg_kmem_uncharge_page(struct page *page, int order) |
9b6f7e16 RG |
1729 | { |
1730 | } | |
1731 | ||
f4b00eab RG |
1732 | static inline int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1733 | int order) | |
60cd4bcd SB |
1734 | { |
1735 | return 0; | |
1736 | } | |
1737 | ||
f4b00eab | 1738 | static inline void __memcg_kmem_uncharge_page(struct page *page, int order) |
60cd4bcd SB |
1739 | { |
1740 | } | |
1741 | ||
749c5415 GC |
1742 | #define for_each_memcg_cache_index(_idx) \ |
1743 | for (; NULL; ) | |
1744 | ||
b9ce5ef4 GC |
1745 | static inline bool memcg_kmem_enabled(void) |
1746 | { | |
1747 | return false; | |
1748 | } | |
1749 | ||
2633d7a0 GC |
1750 | static inline int memcg_cache_id(struct mem_cgroup *memcg) |
1751 | { | |
1752 | return -1; | |
1753 | } | |
1754 | ||
05257a1a VD |
1755 | static inline void memcg_get_cache_ids(void) |
1756 | { | |
1757 | } | |
1758 | ||
1759 | static inline void memcg_put_cache_ids(void) | |
1760 | { | |
1761 | } | |
1762 | ||
8380ce47 RG |
1763 | static inline struct mem_cgroup *mem_cgroup_from_obj(void *p) |
1764 | { | |
1765 | return NULL; | |
1766 | } | |
1767 | ||
84c07d11 | 1768 | #endif /* CONFIG_MEMCG_KMEM */ |
127424c8 | 1769 | |
8cdea7c0 | 1770 | #endif /* _LINUX_MEMCONTROL_H */ |