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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, |
a8c49af3 | 37 | MEMCG_KMEM, |
f4840ccf JW |
38 | MEMCG_ZSWAP_B, |
39 | MEMCG_ZSWAPPED, | |
b2807f07 | 40 | MEMCG_NR_STAT, |
2a7106f2 GT |
41 | }; |
42 | ||
e27be240 JW |
43 | enum memcg_memory_event { |
44 | MEMCG_LOW, | |
71cd3113 JW |
45 | MEMCG_HIGH, |
46 | MEMCG_MAX, | |
47 | MEMCG_OOM, | |
fe6bdfc8 | 48 | MEMCG_OOM_KILL, |
b6bf9abb | 49 | MEMCG_OOM_GROUP_KILL, |
4b82ab4f | 50 | MEMCG_SWAP_HIGH, |
f3a53a3a TH |
51 | MEMCG_SWAP_MAX, |
52 | MEMCG_SWAP_FAIL, | |
e27be240 | 53 | MEMCG_NR_MEMORY_EVENTS, |
71cd3113 JW |
54 | }; |
55 | ||
5660048c | 56 | struct mem_cgroup_reclaim_cookie { |
ef8f2327 | 57 | pg_data_t *pgdat; |
5660048c JW |
58 | unsigned int generation; |
59 | }; | |
60 | ||
71cd3113 JW |
61 | #ifdef CONFIG_MEMCG |
62 | ||
63 | #define MEM_CGROUP_ID_SHIFT 16 | |
64 | #define MEM_CGROUP_ID_MAX USHRT_MAX | |
65 | ||
66 | struct mem_cgroup_id { | |
67 | int id; | |
1c2d479a | 68 | refcount_t ref; |
71cd3113 JW |
69 | }; |
70 | ||
33398cf2 MH |
71 | /* |
72 | * Per memcg event counter is incremented at every pagein/pageout. With THP, | |
0845f831 RD |
73 | * it will be incremented by the number of pages. This counter is used |
74 | * to trigger some periodic events. This is straightforward and better | |
33398cf2 MH |
75 | * than using jiffies etc. to handle periodic memcg event. |
76 | */ | |
77 | enum mem_cgroup_events_target { | |
78 | MEM_CGROUP_TARGET_THRESH, | |
79 | MEM_CGROUP_TARGET_SOFTLIMIT, | |
33398cf2 MH |
80 | MEM_CGROUP_NTARGETS, |
81 | }; | |
82 | ||
410f8e82 SB |
83 | struct memcg_vmstats_percpu; |
84 | struct memcg_vmstats; | |
33398cf2 MH |
85 | |
86 | struct mem_cgroup_reclaim_iter { | |
87 | struct mem_cgroup *position; | |
88 | /* scan generation, increased every round-trip */ | |
89 | unsigned int generation; | |
90 | }; | |
91 | ||
0a4465d3 | 92 | /* |
3c6f17e6 YS |
93 | * Bitmap and deferred work of shrinker::id corresponding to memcg-aware |
94 | * shrinkers, which have elements charged to this memcg. | |
0a4465d3 | 95 | */ |
e4262c4f | 96 | struct shrinker_info { |
0a4465d3 | 97 | struct rcu_head rcu; |
3c6f17e6 YS |
98 | atomic_long_t *nr_deferred; |
99 | unsigned long *map; | |
42c9db39 | 100 | int map_nr_max; |
0a4465d3 KT |
101 | }; |
102 | ||
7e1c0d6f SB |
103 | struct lruvec_stats_percpu { |
104 | /* Local (CPU and cgroup) state */ | |
105 | long state[NR_VM_NODE_STAT_ITEMS]; | |
106 | ||
107 | /* Delta calculation for lockless upward propagation */ | |
108 | long state_prev[NR_VM_NODE_STAT_ITEMS]; | |
109 | }; | |
110 | ||
111 | struct lruvec_stats { | |
112 | /* Aggregated (CPU and subtree) state */ | |
113 | long state[NR_VM_NODE_STAT_ITEMS]; | |
114 | ||
115 | /* Pending child counts during tree propagation */ | |
116 | long state_pending[NR_VM_NODE_STAT_ITEMS]; | |
117 | }; | |
118 | ||
33398cf2 | 119 | /* |
242c37b4 | 120 | * per-node information in memory controller. |
33398cf2 | 121 | */ |
ef8f2327 | 122 | struct mem_cgroup_per_node { |
33398cf2 | 123 | struct lruvec lruvec; |
a983b5eb | 124 | |
7e1c0d6f SB |
125 | struct lruvec_stats_percpu __percpu *lruvec_stats_percpu; |
126 | struct lruvec_stats lruvec_stats; | |
a983b5eb | 127 | |
b4536f0c | 128 | unsigned long lru_zone_size[MAX_NR_ZONES][NR_LRU_LISTS]; |
33398cf2 | 129 | |
9da83f3f | 130 | struct mem_cgroup_reclaim_iter iter; |
33398cf2 | 131 | |
e4262c4f | 132 | struct shrinker_info __rcu *shrinker_info; |
0a432dcb | 133 | |
33398cf2 MH |
134 | struct rb_node tree_node; /* RB tree node */ |
135 | unsigned long usage_in_excess;/* Set to the value by which */ | |
136 | /* the soft limit is exceeded*/ | |
137 | bool on_tree; | |
138 | struct mem_cgroup *memcg; /* Back pointer, we cannot */ | |
139 | /* use container_of */ | |
140 | }; | |
141 | ||
33398cf2 MH |
142 | struct mem_cgroup_threshold { |
143 | struct eventfd_ctx *eventfd; | |
144 | unsigned long threshold; | |
145 | }; | |
146 | ||
147 | /* For threshold */ | |
148 | struct mem_cgroup_threshold_ary { | |
149 | /* An array index points to threshold just below or equal to usage. */ | |
150 | int current_threshold; | |
151 | /* Size of entries[] */ | |
152 | unsigned int size; | |
153 | /* Array of thresholds */ | |
307ed94c | 154 | struct mem_cgroup_threshold entries[]; |
33398cf2 MH |
155 | }; |
156 | ||
157 | struct mem_cgroup_thresholds { | |
158 | /* Primary thresholds array */ | |
159 | struct mem_cgroup_threshold_ary *primary; | |
160 | /* | |
161 | * Spare threshold array. | |
162 | * This is needed to make mem_cgroup_unregister_event() "never fail". | |
163 | * It must be able to store at least primary->size - 1 entries. | |
164 | */ | |
165 | struct mem_cgroup_threshold_ary *spare; | |
166 | }; | |
167 | ||
97b27821 TH |
168 | /* |
169 | * Remember four most recent foreign writebacks with dirty pages in this | |
170 | * cgroup. Inode sharing is expected to be uncommon and, even if we miss | |
171 | * one in a given round, we're likely to catch it later if it keeps | |
172 | * foreign-dirtying, so a fairly low count should be enough. | |
173 | * | |
174 | * See mem_cgroup_track_foreign_dirty_slowpath() for details. | |
175 | */ | |
176 | #define MEMCG_CGWB_FRN_CNT 4 | |
177 | ||
178 | struct memcg_cgwb_frn { | |
179 | u64 bdi_id; /* bdi->id of the foreign inode */ | |
180 | int memcg_id; /* memcg->css.id of foreign inode */ | |
181 | u64 at; /* jiffies_64 at the time of dirtying */ | |
182 | struct wb_completion done; /* tracks in-flight foreign writebacks */ | |
183 | }; | |
184 | ||
bf4f0599 RG |
185 | /* |
186 | * Bucket for arbitrarily byte-sized objects charged to a memory | |
187 | * cgroup. The bucket can be reparented in one piece when the cgroup | |
188 | * is destroyed, without having to round up the individual references | |
189 | * of all live memory objects in the wild. | |
190 | */ | |
191 | struct obj_cgroup { | |
192 | struct percpu_ref refcnt; | |
193 | struct mem_cgroup *memcg; | |
194 | atomic_t nr_charged_bytes; | |
195 | union { | |
0764db9b | 196 | struct list_head list; /* protected by objcg_lock */ |
bf4f0599 RG |
197 | struct rcu_head rcu; |
198 | }; | |
199 | }; | |
200 | ||
33398cf2 MH |
201 | /* |
202 | * The memory controller data structure. The memory controller controls both | |
203 | * page cache and RSS per cgroup. We would eventually like to provide | |
204 | * statistics based on the statistics developed by Rik Van Riel for clock-pro, | |
205 | * to help the administrator determine what knobs to tune. | |
206 | */ | |
207 | struct mem_cgroup { | |
208 | struct cgroup_subsys_state css; | |
209 | ||
73f576c0 JW |
210 | /* Private memcg ID. Used to ID objects that outlive the cgroup */ |
211 | struct mem_cgroup_id id; | |
212 | ||
33398cf2 | 213 | /* Accounted resources */ |
bd0b230f WL |
214 | struct page_counter memory; /* Both v1 & v2 */ |
215 | ||
216 | union { | |
217 | struct page_counter swap; /* v2 only */ | |
218 | struct page_counter memsw; /* v1 only */ | |
219 | }; | |
0db15298 JW |
220 | |
221 | /* Legacy consumer-oriented counters */ | |
bd0b230f WL |
222 | struct page_counter kmem; /* v1 only */ |
223 | struct page_counter tcpmem; /* v1 only */ | |
33398cf2 | 224 | |
f7e1cb6e JW |
225 | /* Range enforcement for interrupt charges */ |
226 | struct work_struct high_work; | |
227 | ||
f4840ccf JW |
228 | #if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_ZSWAP) |
229 | unsigned long zswap_max; | |
230 | #endif | |
231 | ||
33398cf2 MH |
232 | unsigned long soft_limit; |
233 | ||
234 | /* vmpressure notifications */ | |
235 | struct vmpressure vmpressure; | |
236 | ||
3d8b38eb RG |
237 | /* |
238 | * Should the OOM killer kill all belonging tasks, had it kill one? | |
239 | */ | |
240 | bool oom_group; | |
241 | ||
33398cf2 MH |
242 | /* protected by memcg_oom_lock */ |
243 | bool oom_lock; | |
244 | int under_oom; | |
245 | ||
246 | int swappiness; | |
247 | /* OOM-Killer disable */ | |
248 | int oom_kill_disable; | |
249 | ||
1e577f97 | 250 | /* memory.events and memory.events.local */ |
472912a2 | 251 | struct cgroup_file events_file; |
1e577f97 | 252 | struct cgroup_file events_local_file; |
472912a2 | 253 | |
f3a53a3a TH |
254 | /* handle for "memory.swap.events" */ |
255 | struct cgroup_file swap_events_file; | |
256 | ||
33398cf2 MH |
257 | /* protect arrays of thresholds */ |
258 | struct mutex thresholds_lock; | |
259 | ||
260 | /* thresholds for memory usage. RCU-protected */ | |
261 | struct mem_cgroup_thresholds thresholds; | |
262 | ||
263 | /* thresholds for mem+swap usage. RCU-protected */ | |
264 | struct mem_cgroup_thresholds memsw_thresholds; | |
265 | ||
266 | /* For oom notifier event fd */ | |
267 | struct list_head oom_notify; | |
268 | ||
269 | /* | |
270 | * Should we move charges of a task when a task is moved into this | |
271 | * mem_cgroup ? And what type of charges should we move ? | |
272 | */ | |
273 | unsigned long move_charge_at_immigrate; | |
e81bf979 AL |
274 | /* taken only while moving_account > 0 */ |
275 | spinlock_t move_lock; | |
276 | unsigned long move_lock_flags; | |
277 | ||
e6ad640b | 278 | CACHELINE_PADDING(_pad1_); |
e81bf979 | 279 | |
2d146aa3 | 280 | /* memory.stat */ |
410f8e82 | 281 | struct memcg_vmstats *vmstats; |
42a30035 | 282 | |
815744d7 | 283 | /* memory.events */ |
42a30035 | 284 | atomic_long_t memory_events[MEMCG_NR_MEMORY_EVENTS]; |
1e577f97 | 285 | atomic_long_t memory_events_local[MEMCG_NR_MEMORY_EVENTS]; |
33398cf2 | 286 | |
d886f4e4 JW |
287 | unsigned long socket_pressure; |
288 | ||
289 | /* Legacy tcp memory accounting */ | |
0db15298 JW |
290 | bool tcpmem_active; |
291 | int tcpmem_pressure; | |
d886f4e4 | 292 | |
84c07d11 | 293 | #ifdef CONFIG_MEMCG_KMEM |
33398cf2 | 294 | int kmemcg_id; |
bf4f0599 | 295 | struct obj_cgroup __rcu *objcg; |
0764db9b RG |
296 | /* list of inherited objcgs, protected by objcg_lock */ |
297 | struct list_head objcg_list; | |
33398cf2 MH |
298 | #endif |
299 | ||
e6ad640b | 300 | CACHELINE_PADDING(_pad2_); |
4df91062 FT |
301 | |
302 | /* | |
303 | * set > 0 if pages under this cgroup are moving to other cgroup. | |
304 | */ | |
305 | atomic_t moving_account; | |
306 | struct task_struct *move_lock_task; | |
307 | ||
4df91062 FT |
308 | struct memcg_vmstats_percpu __percpu *vmstats_percpu; |
309 | ||
33398cf2 MH |
310 | #ifdef CONFIG_CGROUP_WRITEBACK |
311 | struct list_head cgwb_list; | |
312 | struct wb_domain cgwb_domain; | |
97b27821 | 313 | struct memcg_cgwb_frn cgwb_frn[MEMCG_CGWB_FRN_CNT]; |
33398cf2 MH |
314 | #endif |
315 | ||
316 | /* List of events which userspace want to receive */ | |
317 | struct list_head event_list; | |
318 | spinlock_t event_list_lock; | |
319 | ||
87eaceb3 YS |
320 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
321 | struct deferred_split deferred_split_queue; | |
322 | #endif | |
323 | ||
bd74fdae YZ |
324 | #ifdef CONFIG_LRU_GEN |
325 | /* per-memcg mm_struct list */ | |
326 | struct lru_gen_mm_list mm_list; | |
327 | #endif | |
328 | ||
b51478a0 | 329 | struct mem_cgroup_per_node *nodeinfo[]; |
33398cf2 | 330 | }; |
7d828602 | 331 | |
a983b5eb | 332 | /* |
1813e51e SB |
333 | * size of first charge trial. |
334 | * TODO: maybe necessary to use big numbers in big irons or dynamic based of the | |
335 | * workload. | |
a983b5eb | 336 | */ |
1813e51e | 337 | #define MEMCG_CHARGE_BATCH 64U |
a983b5eb | 338 | |
7d828602 | 339 | extern struct mem_cgroup *root_mem_cgroup; |
56161634 | 340 | |
87944e29 RG |
341 | enum page_memcg_data_flags { |
342 | /* page->memcg_data is a pointer to an objcgs vector */ | |
343 | MEMCG_DATA_OBJCGS = (1UL << 0), | |
18b2db3b RG |
344 | /* page has been accounted as a non-slab kernel page */ |
345 | MEMCG_DATA_KMEM = (1UL << 1), | |
87944e29 | 346 | /* the next bit after the last actual flag */ |
18b2db3b | 347 | __NR_MEMCG_DATA_FLAGS = (1UL << 2), |
87944e29 RG |
348 | }; |
349 | ||
350 | #define MEMCG_DATA_FLAGS_MASK (__NR_MEMCG_DATA_FLAGS - 1) | |
351 | ||
1b7e4464 | 352 | static inline bool folio_memcg_kmem(struct folio *folio); |
b4e0b68f MS |
353 | |
354 | /* | |
355 | * After the initialization objcg->memcg is always pointing at | |
356 | * a valid memcg, but can be atomically swapped to the parent memcg. | |
357 | * | |
358 | * The caller must ensure that the returned memcg won't be released: | |
359 | * e.g. acquire the rcu_read_lock or css_set_lock. | |
360 | */ | |
361 | static inline struct mem_cgroup *obj_cgroup_memcg(struct obj_cgroup *objcg) | |
362 | { | |
363 | return READ_ONCE(objcg->memcg); | |
364 | } | |
365 | ||
366 | /* | |
1b7e4464 MWO |
367 | * __folio_memcg - Get the memory cgroup associated with a non-kmem folio |
368 | * @folio: Pointer to the folio. | |
b4e0b68f | 369 | * |
1b7e4464 MWO |
370 | * Returns a pointer to the memory cgroup associated with the folio, |
371 | * or NULL. This function assumes that the folio is known to have a | |
b4e0b68f | 372 | * proper memory cgroup pointer. It's not safe to call this function |
1b7e4464 MWO |
373 | * against some type of folios, e.g. slab folios or ex-slab folios or |
374 | * kmem folios. | |
b4e0b68f | 375 | */ |
1b7e4464 | 376 | static inline struct mem_cgroup *__folio_memcg(struct folio *folio) |
b4e0b68f | 377 | { |
1b7e4464 | 378 | unsigned long memcg_data = folio->memcg_data; |
b4e0b68f | 379 | |
1b7e4464 MWO |
380 | VM_BUG_ON_FOLIO(folio_test_slab(folio), folio); |
381 | VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_OBJCGS, folio); | |
382 | VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_KMEM, folio); | |
b4e0b68f MS |
383 | |
384 | return (struct mem_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); | |
385 | } | |
386 | ||
387 | /* | |
1b7e4464 MWO |
388 | * __folio_objcg - get the object cgroup associated with a kmem folio. |
389 | * @folio: Pointer to the folio. | |
b4e0b68f | 390 | * |
1b7e4464 MWO |
391 | * Returns a pointer to the object cgroup associated with the folio, |
392 | * or NULL. This function assumes that the folio is known to have a | |
b4e0b68f | 393 | * proper object cgroup pointer. It's not safe to call this function |
1b7e4464 MWO |
394 | * against some type of folios, e.g. slab folios or ex-slab folios or |
395 | * LRU folios. | |
b4e0b68f | 396 | */ |
1b7e4464 | 397 | static inline struct obj_cgroup *__folio_objcg(struct folio *folio) |
b4e0b68f | 398 | { |
1b7e4464 | 399 | unsigned long memcg_data = folio->memcg_data; |
b4e0b68f | 400 | |
1b7e4464 MWO |
401 | VM_BUG_ON_FOLIO(folio_test_slab(folio), folio); |
402 | VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_OBJCGS, folio); | |
403 | VM_BUG_ON_FOLIO(!(memcg_data & MEMCG_DATA_KMEM), folio); | |
b4e0b68f MS |
404 | |
405 | return (struct obj_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); | |
406 | } | |
407 | ||
bcfe06bf | 408 | /* |
1b7e4464 MWO |
409 | * folio_memcg - Get the memory cgroup associated with a folio. |
410 | * @folio: Pointer to the folio. | |
bcfe06bf | 411 | * |
1b7e4464 MWO |
412 | * Returns a pointer to the memory cgroup associated with the folio, |
413 | * or NULL. This function assumes that the folio is known to have a | |
bcfe06bf | 414 | * proper memory cgroup pointer. It's not safe to call this function |
1b7e4464 | 415 | * against some type of folios, e.g. slab folios or ex-slab folios. |
bcfe06bf | 416 | * |
1b7e4464 | 417 | * For a non-kmem folio any of the following ensures folio and memcg binding |
b4e0b68f MS |
418 | * stability: |
419 | * | |
1b7e4464 | 420 | * - the folio lock |
bcfe06bf RG |
421 | * - LRU isolation |
422 | * - lock_page_memcg() | |
423 | * - exclusive reference | |
018ee47f | 424 | * - mem_cgroup_trylock_pages() |
b4e0b68f | 425 | * |
1b7e4464 MWO |
426 | * For a kmem folio a caller should hold an rcu read lock to protect memcg |
427 | * associated with a kmem folio from being released. | |
bcfe06bf | 428 | */ |
1b7e4464 MWO |
429 | static inline struct mem_cgroup *folio_memcg(struct folio *folio) |
430 | { | |
431 | if (folio_memcg_kmem(folio)) | |
432 | return obj_cgroup_memcg(__folio_objcg(folio)); | |
433 | return __folio_memcg(folio); | |
434 | } | |
435 | ||
bcfe06bf RG |
436 | static inline struct mem_cgroup *page_memcg(struct page *page) |
437 | { | |
1b7e4464 | 438 | return folio_memcg(page_folio(page)); |
bcfe06bf RG |
439 | } |
440 | ||
c5ce619a MWO |
441 | /** |
442 | * folio_memcg_rcu - Locklessly get the memory cgroup associated with a folio. | |
443 | * @folio: Pointer to the folio. | |
bcfe06bf | 444 | * |
c5ce619a | 445 | * This function assumes that the folio is known to have a |
bcfe06bf | 446 | * proper memory cgroup pointer. It's not safe to call this function |
c5ce619a MWO |
447 | * against some type of folios, e.g. slab folios or ex-slab folios. |
448 | * | |
449 | * Return: A pointer to the memory cgroup associated with the folio, | |
450 | * or NULL. | |
bcfe06bf | 451 | */ |
c5ce619a | 452 | static inline struct mem_cgroup *folio_memcg_rcu(struct folio *folio) |
bcfe06bf | 453 | { |
c5ce619a | 454 | unsigned long memcg_data = READ_ONCE(folio->memcg_data); |
b4e0b68f | 455 | |
c5ce619a | 456 | VM_BUG_ON_FOLIO(folio_test_slab(folio), folio); |
bcfe06bf RG |
457 | WARN_ON_ONCE(!rcu_read_lock_held()); |
458 | ||
b4e0b68f MS |
459 | if (memcg_data & MEMCG_DATA_KMEM) { |
460 | struct obj_cgroup *objcg; | |
461 | ||
462 | objcg = (void *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); | |
463 | return obj_cgroup_memcg(objcg); | |
464 | } | |
465 | ||
466 | return (struct mem_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); | |
bcfe06bf RG |
467 | } |
468 | ||
469 | /* | |
becacb04 MW |
470 | * folio_memcg_check - Get the memory cgroup associated with a folio. |
471 | * @folio: Pointer to the folio. | |
bcfe06bf | 472 | * |
becacb04 MW |
473 | * Returns a pointer to the memory cgroup associated with the folio, |
474 | * or NULL. This function unlike folio_memcg() can take any folio | |
475 | * as an argument. It has to be used in cases when it's not known if a folio | |
b4e0b68f MS |
476 | * has an associated memory cgroup pointer or an object cgroups vector or |
477 | * an object cgroup. | |
478 | * | |
becacb04 | 479 | * For a non-kmem folio any of the following ensures folio and memcg binding |
b4e0b68f | 480 | * stability: |
bcfe06bf | 481 | * |
becacb04 | 482 | * - the folio lock |
bcfe06bf | 483 | * - LRU isolation |
becacb04 | 484 | * - lock_folio_memcg() |
bcfe06bf | 485 | * - exclusive reference |
018ee47f | 486 | * - mem_cgroup_trylock_pages() |
b4e0b68f | 487 | * |
becacb04 MW |
488 | * For a kmem folio a caller should hold an rcu read lock to protect memcg |
489 | * associated with a kmem folio from being released. | |
bcfe06bf | 490 | */ |
becacb04 | 491 | static inline struct mem_cgroup *folio_memcg_check(struct folio *folio) |
bcfe06bf RG |
492 | { |
493 | /* | |
becacb04 MW |
494 | * Because folio->memcg_data might be changed asynchronously |
495 | * for slabs, READ_ONCE() should be used here. | |
bcfe06bf | 496 | */ |
becacb04 | 497 | unsigned long memcg_data = READ_ONCE(folio->memcg_data); |
bcfe06bf | 498 | |
87944e29 | 499 | if (memcg_data & MEMCG_DATA_OBJCGS) |
bcfe06bf RG |
500 | return NULL; |
501 | ||
b4e0b68f MS |
502 | if (memcg_data & MEMCG_DATA_KMEM) { |
503 | struct obj_cgroup *objcg; | |
504 | ||
505 | objcg = (void *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); | |
506 | return obj_cgroup_memcg(objcg); | |
507 | } | |
508 | ||
18b2db3b RG |
509 | return (struct mem_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); |
510 | } | |
511 | ||
becacb04 MW |
512 | static inline struct mem_cgroup *page_memcg_check(struct page *page) |
513 | { | |
514 | if (PageTail(page)) | |
515 | return NULL; | |
516 | return folio_memcg_check((struct folio *)page); | |
517 | } | |
518 | ||
88f2ef73 MS |
519 | static inline struct mem_cgroup *get_mem_cgroup_from_objcg(struct obj_cgroup *objcg) |
520 | { | |
521 | struct mem_cgroup *memcg; | |
522 | ||
523 | rcu_read_lock(); | |
524 | retry: | |
525 | memcg = obj_cgroup_memcg(objcg); | |
526 | if (unlikely(!css_tryget(&memcg->css))) | |
527 | goto retry; | |
528 | rcu_read_unlock(); | |
529 | ||
530 | return memcg; | |
531 | } | |
532 | ||
bd290e1e | 533 | #ifdef CONFIG_MEMCG_KMEM |
18b2db3b | 534 | /* |
1b7e4464 MWO |
535 | * folio_memcg_kmem - Check if the folio has the memcg_kmem flag set. |
536 | * @folio: Pointer to the folio. | |
18b2db3b | 537 | * |
1b7e4464 MWO |
538 | * Checks if the folio has MemcgKmem flag set. The caller must ensure |
539 | * that the folio has an associated memory cgroup. It's not safe to call | |
540 | * this function against some types of folios, e.g. slab folios. | |
18b2db3b | 541 | */ |
1b7e4464 | 542 | static inline bool folio_memcg_kmem(struct folio *folio) |
18b2db3b | 543 | { |
1b7e4464 MWO |
544 | VM_BUG_ON_PGFLAGS(PageTail(&folio->page), &folio->page); |
545 | VM_BUG_ON_FOLIO(folio->memcg_data & MEMCG_DATA_OBJCGS, folio); | |
546 | return folio->memcg_data & MEMCG_DATA_KMEM; | |
bcfe06bf RG |
547 | } |
548 | ||
270c6a71 | 549 | |
270c6a71 | 550 | #else |
1b7e4464 | 551 | static inline bool folio_memcg_kmem(struct folio *folio) |
bd290e1e MS |
552 | { |
553 | return false; | |
554 | } | |
555 | ||
270c6a71 RG |
556 | #endif |
557 | ||
1b7e4464 MWO |
558 | static inline bool PageMemcgKmem(struct page *page) |
559 | { | |
560 | return folio_memcg_kmem(page_folio(page)); | |
561 | } | |
562 | ||
dfd2f10c KT |
563 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
564 | { | |
565 | return (memcg == root_mem_cgroup); | |
566 | } | |
567 | ||
23047a96 JW |
568 | static inline bool mem_cgroup_disabled(void) |
569 | { | |
570 | return !cgroup_subsys_enabled(memory_cgrp_subsys); | |
571 | } | |
572 | ||
f56ce412 JW |
573 | static inline void mem_cgroup_protection(struct mem_cgroup *root, |
574 | struct mem_cgroup *memcg, | |
575 | unsigned long *min, | |
576 | unsigned long *low) | |
9783aa99 | 577 | { |
f56ce412 JW |
578 | *min = *low = 0; |
579 | ||
1bc63fb1 | 580 | if (mem_cgroup_disabled()) |
f56ce412 | 581 | return; |
1bc63fb1 | 582 | |
22f7496f YS |
583 | /* |
584 | * There is no reclaim protection applied to a targeted reclaim. | |
585 | * We are special casing this specific case here because | |
586 | * mem_cgroup_protected calculation is not robust enough to keep | |
587 | * the protection invariant for calculated effective values for | |
588 | * parallel reclaimers with different reclaim target. This is | |
589 | * especially a problem for tail memcgs (as they have pages on LRU) | |
590 | * which would want to have effective values 0 for targeted reclaim | |
591 | * but a different value for external reclaim. | |
592 | * | |
593 | * Example | |
594 | * Let's have global and A's reclaim in parallel: | |
595 | * | | |
596 | * A (low=2G, usage = 3G, max = 3G, children_low_usage = 1.5G) | |
597 | * |\ | |
598 | * | C (low = 1G, usage = 2.5G) | |
599 | * B (low = 1G, usage = 0.5G) | |
600 | * | |
601 | * For the global reclaim | |
602 | * A.elow = A.low | |
603 | * B.elow = min(B.usage, B.low) because children_low_usage <= A.elow | |
604 | * C.elow = min(C.usage, C.low) | |
605 | * | |
606 | * With the effective values resetting we have A reclaim | |
607 | * A.elow = 0 | |
608 | * B.elow = B.low | |
609 | * C.elow = C.low | |
610 | * | |
611 | * If the global reclaim races with A's reclaim then | |
612 | * B.elow = C.elow = 0 because children_low_usage > A.elow) | |
613 | * is possible and reclaiming B would be violating the protection. | |
614 | * | |
615 | */ | |
616 | if (root == memcg) | |
f56ce412 | 617 | return; |
9783aa99 | 618 | |
f56ce412 JW |
619 | *min = READ_ONCE(memcg->memory.emin); |
620 | *low = READ_ONCE(memcg->memory.elow); | |
9783aa99 CD |
621 | } |
622 | ||
45c7f7e1 CD |
623 | void mem_cgroup_calculate_protection(struct mem_cgroup *root, |
624 | struct mem_cgroup *memcg); | |
625 | ||
adb82130 YA |
626 | static inline bool mem_cgroup_unprotected(struct mem_cgroup *target, |
627 | struct mem_cgroup *memcg) | |
45c7f7e1 CD |
628 | { |
629 | /* | |
630 | * The root memcg doesn't account charges, and doesn't support | |
adb82130 YA |
631 | * protection. The target memcg's protection is ignored, see |
632 | * mem_cgroup_calculate_protection() and mem_cgroup_protection() | |
45c7f7e1 | 633 | */ |
adb82130 YA |
634 | return mem_cgroup_disabled() || mem_cgroup_is_root(memcg) || |
635 | memcg == target; | |
45c7f7e1 CD |
636 | } |
637 | ||
adb82130 YA |
638 | static inline bool mem_cgroup_below_low(struct mem_cgroup *target, |
639 | struct mem_cgroup *memcg) | |
45c7f7e1 | 640 | { |
adb82130 | 641 | if (mem_cgroup_unprotected(target, memcg)) |
45c7f7e1 CD |
642 | return false; |
643 | ||
644 | return READ_ONCE(memcg->memory.elow) >= | |
645 | page_counter_read(&memcg->memory); | |
646 | } | |
647 | ||
adb82130 YA |
648 | static inline bool mem_cgroup_below_min(struct mem_cgroup *target, |
649 | struct mem_cgroup *memcg) | |
45c7f7e1 | 650 | { |
adb82130 | 651 | if (mem_cgroup_unprotected(target, memcg)) |
45c7f7e1 CD |
652 | return false; |
653 | ||
654 | return READ_ONCE(memcg->memory.emin) >= | |
655 | page_counter_read(&memcg->memory); | |
656 | } | |
241994ed | 657 | |
8f425e4e MWO |
658 | int __mem_cgroup_charge(struct folio *folio, struct mm_struct *mm, gfp_t gfp); |
659 | ||
660 | /** | |
661 | * mem_cgroup_charge - Charge a newly allocated folio to a cgroup. | |
662 | * @folio: Folio to charge. | |
663 | * @mm: mm context of the allocating task. | |
664 | * @gfp: Reclaim mode. | |
665 | * | |
666 | * Try to charge @folio to the memcg that @mm belongs to, reclaiming | |
667 | * pages according to @gfp if necessary. If @mm is NULL, try to | |
668 | * charge to the active memcg. | |
669 | * | |
670 | * Do not use this for folios allocated for swapin. | |
671 | * | |
672 | * Return: 0 on success. Otherwise, an error code is returned. | |
673 | */ | |
674 | static inline int mem_cgroup_charge(struct folio *folio, struct mm_struct *mm, | |
675 | gfp_t gfp) | |
2c8d8f97 SB |
676 | { |
677 | if (mem_cgroup_disabled()) | |
678 | return 0; | |
8f425e4e | 679 | return __mem_cgroup_charge(folio, mm, gfp); |
2c8d8f97 SB |
680 | } |
681 | ||
65995918 | 682 | int mem_cgroup_swapin_charge_folio(struct folio *folio, struct mm_struct *mm, |
0add0c77 SB |
683 | gfp_t gfp, swp_entry_t entry); |
684 | void mem_cgroup_swapin_uncharge_swap(swp_entry_t entry); | |
3fea5a49 | 685 | |
bbc6b703 MWO |
686 | void __mem_cgroup_uncharge(struct folio *folio); |
687 | ||
688 | /** | |
689 | * mem_cgroup_uncharge - Uncharge a folio. | |
690 | * @folio: Folio to uncharge. | |
691 | * | |
692 | * Uncharge a folio previously charged with mem_cgroup_charge(). | |
693 | */ | |
694 | static inline void mem_cgroup_uncharge(struct folio *folio) | |
2c8d8f97 SB |
695 | { |
696 | if (mem_cgroup_disabled()) | |
697 | return; | |
bbc6b703 | 698 | __mem_cgroup_uncharge(folio); |
2c8d8f97 SB |
699 | } |
700 | ||
701 | void __mem_cgroup_uncharge_list(struct list_head *page_list); | |
702 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) | |
703 | { | |
704 | if (mem_cgroup_disabled()) | |
705 | return; | |
706 | __mem_cgroup_uncharge_list(page_list); | |
707 | } | |
569b846d | 708 | |
d21bba2b | 709 | void mem_cgroup_migrate(struct folio *old, struct folio *new); |
569b846d | 710 | |
55779ec7 | 711 | /** |
867e5e1d | 712 | * mem_cgroup_lruvec - get the lru list vector for a memcg & node |
55779ec7 | 713 | * @memcg: memcg of the wanted lruvec |
9a1ac228 | 714 | * @pgdat: pglist_data |
55779ec7 | 715 | * |
867e5e1d | 716 | * Returns the lru list vector holding pages for a given @memcg & |
9a1ac228 | 717 | * @pgdat combination. This can be the node lruvec, if the memory |
867e5e1d | 718 | * controller is disabled. |
55779ec7 | 719 | */ |
867e5e1d JW |
720 | static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg, |
721 | struct pglist_data *pgdat) | |
55779ec7 | 722 | { |
ef8f2327 | 723 | struct mem_cgroup_per_node *mz; |
55779ec7 JW |
724 | struct lruvec *lruvec; |
725 | ||
726 | if (mem_cgroup_disabled()) { | |
867e5e1d | 727 | lruvec = &pgdat->__lruvec; |
55779ec7 JW |
728 | goto out; |
729 | } | |
730 | ||
1b05117d JW |
731 | if (!memcg) |
732 | memcg = root_mem_cgroup; | |
733 | ||
a3747b53 | 734 | mz = memcg->nodeinfo[pgdat->node_id]; |
55779ec7 JW |
735 | lruvec = &mz->lruvec; |
736 | out: | |
737 | /* | |
738 | * Since a node can be onlined after the mem_cgroup was created, | |
599d0c95 | 739 | * we have to be prepared to initialize lruvec->pgdat here; |
55779ec7 JW |
740 | * and if offlined then reonlined, we need to reinitialize it. |
741 | */ | |
ef8f2327 MG |
742 | if (unlikely(lruvec->pgdat != pgdat)) |
743 | lruvec->pgdat = pgdat; | |
55779ec7 JW |
744 | return lruvec; |
745 | } | |
746 | ||
9a1ac228 | 747 | /** |
b1baabd9 MWO |
748 | * folio_lruvec - return lruvec for isolating/putting an LRU folio |
749 | * @folio: Pointer to the folio. | |
9a1ac228 | 750 | * |
b1baabd9 | 751 | * This function relies on folio->mem_cgroup being stable. |
9a1ac228 | 752 | */ |
b1baabd9 | 753 | static inline struct lruvec *folio_lruvec(struct folio *folio) |
9a1ac228 | 754 | { |
b1baabd9 | 755 | struct mem_cgroup *memcg = folio_memcg(folio); |
9a1ac228 | 756 | |
b1baabd9 MWO |
757 | VM_WARN_ON_ONCE_FOLIO(!memcg && !mem_cgroup_disabled(), folio); |
758 | return mem_cgroup_lruvec(memcg, folio_pgdat(folio)); | |
9a1ac228 | 759 | } |
c9b0ed51 | 760 | |
64219994 | 761 | struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
e993d905 | 762 | |
d46eb14b SB |
763 | struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm); |
764 | ||
e809c3fe MWO |
765 | struct lruvec *folio_lruvec_lock(struct folio *folio); |
766 | struct lruvec *folio_lruvec_lock_irq(struct folio *folio); | |
767 | struct lruvec *folio_lruvec_lock_irqsave(struct folio *folio, | |
6168d0da AS |
768 | unsigned long *flags); |
769 | ||
770 | #ifdef CONFIG_DEBUG_VM | |
e809c3fe | 771 | void lruvec_memcg_debug(struct lruvec *lruvec, struct folio *folio); |
6168d0da | 772 | #else |
e809c3fe MWO |
773 | static inline |
774 | void lruvec_memcg_debug(struct lruvec *lruvec, struct folio *folio) | |
6168d0da AS |
775 | { |
776 | } | |
777 | #endif | |
778 | ||
33398cf2 MH |
779 | static inline |
780 | struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){ | |
781 | return css ? container_of(css, struct mem_cgroup, css) : NULL; | |
782 | } | |
783 | ||
bf4f0599 RG |
784 | static inline bool obj_cgroup_tryget(struct obj_cgroup *objcg) |
785 | { | |
786 | return percpu_ref_tryget(&objcg->refcnt); | |
787 | } | |
788 | ||
789 | static inline void obj_cgroup_get(struct obj_cgroup *objcg) | |
790 | { | |
791 | percpu_ref_get(&objcg->refcnt); | |
792 | } | |
793 | ||
b4e0b68f MS |
794 | static inline void obj_cgroup_get_many(struct obj_cgroup *objcg, |
795 | unsigned long nr) | |
bf4f0599 | 796 | { |
b4e0b68f | 797 | percpu_ref_get_many(&objcg->refcnt, nr); |
bf4f0599 RG |
798 | } |
799 | ||
b4e0b68f | 800 | static inline void obj_cgroup_put(struct obj_cgroup *objcg) |
bf4f0599 | 801 | { |
b4e0b68f | 802 | percpu_ref_put(&objcg->refcnt); |
bf4f0599 RG |
803 | } |
804 | ||
e4dde56c YZ |
805 | static inline bool mem_cgroup_tryget(struct mem_cgroup *memcg) |
806 | { | |
807 | return !memcg || css_tryget(&memcg->css); | |
808 | } | |
809 | ||
dc0b5864 RG |
810 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
811 | { | |
d46eb14b SB |
812 | if (memcg) |
813 | css_put(&memcg->css); | |
dc0b5864 RG |
814 | } |
815 | ||
8e8ae645 JW |
816 | #define mem_cgroup_from_counter(counter, member) \ |
817 | container_of(counter, struct mem_cgroup, member) | |
818 | ||
33398cf2 MH |
819 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
820 | struct mem_cgroup *, | |
821 | struct mem_cgroup_reclaim_cookie *); | |
822 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); | |
7c5f64f8 VD |
823 | int mem_cgroup_scan_tasks(struct mem_cgroup *, |
824 | int (*)(struct task_struct *, void *), void *); | |
33398cf2 | 825 | |
23047a96 JW |
826 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
827 | { | |
828 | if (mem_cgroup_disabled()) | |
829 | return 0; | |
830 | ||
73f576c0 | 831 | return memcg->id.id; |
23047a96 | 832 | } |
73f576c0 | 833 | struct mem_cgroup *mem_cgroup_from_id(unsigned short id); |
23047a96 | 834 | |
c15187a4 RG |
835 | #ifdef CONFIG_SHRINKER_DEBUG |
836 | static inline unsigned long mem_cgroup_ino(struct mem_cgroup *memcg) | |
837 | { | |
838 | return memcg ? cgroup_ino(memcg->css.cgroup) : 0; | |
839 | } | |
840 | ||
841 | struct mem_cgroup *mem_cgroup_get_from_ino(unsigned long ino); | |
842 | #endif | |
843 | ||
aa9694bb CD |
844 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
845 | { | |
846 | return mem_cgroup_from_css(seq_css(m)); | |
847 | } | |
848 | ||
2262185c RG |
849 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
850 | { | |
851 | struct mem_cgroup_per_node *mz; | |
852 | ||
853 | if (mem_cgroup_disabled()) | |
854 | return NULL; | |
855 | ||
856 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
857 | return mz->memcg; | |
858 | } | |
859 | ||
8e8ae645 JW |
860 | /** |
861 | * parent_mem_cgroup - find the accounting parent of a memcg | |
862 | * @memcg: memcg whose parent to find | |
863 | * | |
864 | * Returns the parent memcg, or NULL if this is the root or the memory | |
865 | * controller is in legacy no-hierarchy mode. | |
866 | */ | |
867 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) | |
868 | { | |
486bc706 | 869 | return mem_cgroup_from_css(memcg->css.parent); |
8e8ae645 JW |
870 | } |
871 | ||
33398cf2 MH |
872 | static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, |
873 | struct mem_cgroup *root) | |
874 | { | |
875 | if (root == memcg) | |
876 | return true; | |
33398cf2 MH |
877 | return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup); |
878 | } | |
e1aab161 | 879 | |
2314b42d JW |
880 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
881 | struct mem_cgroup *memcg) | |
2e4d4091 | 882 | { |
587af308 | 883 | struct mem_cgroup *task_memcg; |
413918bb | 884 | bool match = false; |
c3ac9a8a | 885 | |
2e4d4091 | 886 | rcu_read_lock(); |
587af308 | 887 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
413918bb | 888 | if (task_memcg) |
2314b42d | 889 | match = mem_cgroup_is_descendant(task_memcg, memcg); |
2e4d4091 | 890 | rcu_read_unlock(); |
c3ac9a8a | 891 | return match; |
2e4d4091 | 892 | } |
8a9f3ccd | 893 | |
75376c6f | 894 | struct cgroup_subsys_state *mem_cgroup_css_from_folio(struct folio *folio); |
2fc04524 | 895 | ino_t page_cgroup_ino(struct page *page); |
d324236b | 896 | |
eb01aaab VD |
897 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
898 | { | |
899 | if (mem_cgroup_disabled()) | |
900 | return true; | |
901 | return !!(memcg->css.flags & CSS_ONLINE); | |
902 | } | |
903 | ||
33398cf2 | 904 | void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, |
b4536f0c | 905 | int zid, int nr_pages); |
33398cf2 | 906 | |
b4536f0c MH |
907 | static inline |
908 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
909 | enum lru_list lru, int zone_idx) | |
910 | { | |
911 | struct mem_cgroup_per_node *mz; | |
912 | ||
913 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
e0e3f42f | 914 | return READ_ONCE(mz->lru_zone_size[zone_idx][lru]); |
33398cf2 MH |
915 | } |
916 | ||
b23afb93 TH |
917 | void mem_cgroup_handle_over_high(void); |
918 | ||
bbec2e15 | 919 | unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg); |
7c5f64f8 | 920 | |
9783aa99 CD |
921 | unsigned long mem_cgroup_size(struct mem_cgroup *memcg); |
922 | ||
f0c867d9 | 923 | void mem_cgroup_print_oom_context(struct mem_cgroup *memcg, |
64219994 | 924 | struct task_struct *p); |
58ae83db | 925 | |
f0c867d9 | 926 | void mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg); |
927 | ||
29ef680a | 928 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 | 929 | { |
29ef680a MH |
930 | WARN_ON(current->in_user_fault); |
931 | current->in_user_fault = 1; | |
519e5247 JW |
932 | } |
933 | ||
29ef680a | 934 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 | 935 | { |
29ef680a MH |
936 | WARN_ON(!current->in_user_fault); |
937 | current->in_user_fault = 0; | |
519e5247 JW |
938 | } |
939 | ||
3812c8c8 JW |
940 | static inline bool task_in_memcg_oom(struct task_struct *p) |
941 | { | |
626ebc41 | 942 | return p->memcg_in_oom; |
3812c8c8 JW |
943 | } |
944 | ||
49426420 | 945 | bool mem_cgroup_oom_synchronize(bool wait); |
3d8b38eb RG |
946 | struct mem_cgroup *mem_cgroup_get_oom_group(struct task_struct *victim, |
947 | struct mem_cgroup *oom_domain); | |
948 | void mem_cgroup_print_oom_group(struct mem_cgroup *memcg); | |
3812c8c8 | 949 | |
f70ad448 MWO |
950 | void folio_memcg_lock(struct folio *folio); |
951 | void folio_memcg_unlock(struct folio *folio); | |
1c824a68 | 952 | void lock_page_memcg(struct page *page); |
62cccb8c | 953 | void unlock_page_memcg(struct page *page); |
d7365e78 | 954 | |
db9adbcb | 955 | void __mod_memcg_state(struct mem_cgroup *memcg, int idx, int val); |
2a2e4885 | 956 | |
018ee47f YZ |
957 | /* try to stablize folio_memcg() for all the pages in a memcg */ |
958 | static inline bool mem_cgroup_trylock_pages(struct mem_cgroup *memcg) | |
959 | { | |
960 | rcu_read_lock(); | |
961 | ||
962 | if (mem_cgroup_disabled() || !atomic_read(&memcg->moving_account)) | |
963 | return true; | |
964 | ||
965 | rcu_read_unlock(); | |
966 | return false; | |
967 | } | |
968 | ||
969 | static inline void mem_cgroup_unlock_pages(void) | |
970 | { | |
971 | rcu_read_unlock(); | |
972 | } | |
973 | ||
04fecbf5 | 974 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 975 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 976 | int idx, int val) |
2a2e4885 | 977 | { |
c3cc3911 JW |
978 | unsigned long flags; |
979 | ||
980 | local_irq_save(flags); | |
a983b5eb | 981 | __mod_memcg_state(memcg, idx, val); |
c3cc3911 | 982 | local_irq_restore(flags); |
2a2e4885 JW |
983 | } |
984 | ||
4e5aa1f4 SB |
985 | static inline void mod_memcg_page_state(struct page *page, |
986 | int idx, int val) | |
987 | { | |
988 | struct mem_cgroup *memcg; | |
989 | ||
990 | if (mem_cgroup_disabled()) | |
991 | return; | |
992 | ||
993 | rcu_read_lock(); | |
994 | memcg = page_memcg(page); | |
995 | if (memcg) | |
996 | mod_memcg_state(memcg, idx, val); | |
997 | rcu_read_unlock(); | |
998 | } | |
999 | ||
410f8e82 | 1000 | unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx); |
7490a2d2 | 1001 | |
42a30035 JW |
1002 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
1003 | enum node_stat_item idx) | |
1004 | { | |
1005 | struct mem_cgroup_per_node *pn; | |
dbb16df6 | 1006 | long x; |
42a30035 JW |
1007 | |
1008 | if (mem_cgroup_disabled()) | |
1009 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
1010 | ||
1011 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
dbb16df6 SB |
1012 | x = READ_ONCE(pn->lruvec_stats.state[idx]); |
1013 | #ifdef CONFIG_SMP | |
1014 | if (x < 0) | |
1015 | x = 0; | |
1016 | #endif | |
1017 | return x; | |
42a30035 JW |
1018 | } |
1019 | ||
205b20cc JW |
1020 | static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
1021 | enum node_stat_item idx) | |
2a7106f2 | 1022 | { |
00f3ca2c | 1023 | struct mem_cgroup_per_node *pn; |
815744d7 JW |
1024 | long x = 0; |
1025 | int cpu; | |
00f3ca2c JW |
1026 | |
1027 | if (mem_cgroup_disabled()) | |
1028 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
1029 | ||
1030 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
815744d7 | 1031 | for_each_possible_cpu(cpu) |
7e1c0d6f | 1032 | x += per_cpu(pn->lruvec_stats_percpu->state[idx], cpu); |
a983b5eb JW |
1033 | #ifdef CONFIG_SMP |
1034 | if (x < 0) | |
1035 | x = 0; | |
1036 | #endif | |
1037 | return x; | |
2a7106f2 GT |
1038 | } |
1039 | ||
aa48e47e | 1040 | void mem_cgroup_flush_stats(void); |
9fad9aee | 1041 | void mem_cgroup_flush_stats_atomic(void); |
4009b2f1 | 1042 | void mem_cgroup_flush_stats_ratelimited(void); |
aa48e47e | 1043 | |
eedc4e5a RG |
1044 | void __mod_memcg_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx, |
1045 | int val); | |
da3ceeff | 1046 | void __mod_lruvec_kmem_state(void *p, enum node_stat_item idx, int val); |
991e7673 | 1047 | |
da3ceeff | 1048 | static inline void mod_lruvec_kmem_state(void *p, enum node_stat_item idx, |
991e7673 SB |
1049 | int val) |
1050 | { | |
1051 | unsigned long flags; | |
1052 | ||
1053 | local_irq_save(flags); | |
da3ceeff | 1054 | __mod_lruvec_kmem_state(p, idx, val); |
991e7673 SB |
1055 | local_irq_restore(flags); |
1056 | } | |
1057 | ||
eedc4e5a RG |
1058 | static inline void mod_memcg_lruvec_state(struct lruvec *lruvec, |
1059 | enum node_stat_item idx, int val) | |
1060 | { | |
1061 | unsigned long flags; | |
1062 | ||
1063 | local_irq_save(flags); | |
1064 | __mod_memcg_lruvec_state(lruvec, idx, val); | |
1065 | local_irq_restore(flags); | |
1066 | } | |
1067 | ||
db9adbcb JW |
1068 | void __count_memcg_events(struct mem_cgroup *memcg, enum vm_event_item idx, |
1069 | unsigned long count); | |
c9019e9b | 1070 | |
2262185c | 1071 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
e27be240 JW |
1072 | enum vm_event_item idx, |
1073 | unsigned long count) | |
2262185c | 1074 | { |
c3cc3911 JW |
1075 | unsigned long flags; |
1076 | ||
1077 | local_irq_save(flags); | |
a983b5eb | 1078 | __count_memcg_events(memcg, idx, count); |
c3cc3911 | 1079 | local_irq_restore(flags); |
2262185c RG |
1080 | } |
1081 | ||
1082 | static inline void count_memcg_page_event(struct page *page, | |
e27be240 | 1083 | enum vm_event_item idx) |
2262185c | 1084 | { |
bcfe06bf RG |
1085 | struct mem_cgroup *memcg = page_memcg(page); |
1086 | ||
1087 | if (memcg) | |
1088 | count_memcg_events(memcg, idx, 1); | |
2262185c RG |
1089 | } |
1090 | ||
64daa5d8 MWO |
1091 | static inline void count_memcg_folio_events(struct folio *folio, |
1092 | enum vm_event_item idx, unsigned long nr) | |
1093 | { | |
1094 | struct mem_cgroup *memcg = folio_memcg(folio); | |
1095 | ||
1096 | if (memcg) | |
1097 | count_memcg_events(memcg, idx, nr); | |
1098 | } | |
1099 | ||
2262185c RG |
1100 | static inline void count_memcg_event_mm(struct mm_struct *mm, |
1101 | enum vm_event_item idx) | |
68ae564b | 1102 | { |
33398cf2 MH |
1103 | struct mem_cgroup *memcg; |
1104 | ||
68ae564b DR |
1105 | if (mem_cgroup_disabled()) |
1106 | return; | |
33398cf2 MH |
1107 | |
1108 | rcu_read_lock(); | |
1109 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
fe6bdfc8 | 1110 | if (likely(memcg)) |
c9019e9b | 1111 | count_memcg_events(memcg, idx, 1); |
33398cf2 | 1112 | rcu_read_unlock(); |
68ae564b | 1113 | } |
c9019e9b | 1114 | |
e27be240 JW |
1115 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
1116 | enum memcg_memory_event event) | |
c9019e9b | 1117 | { |
8b21ca02 MS |
1118 | bool swap_event = event == MEMCG_SWAP_HIGH || event == MEMCG_SWAP_MAX || |
1119 | event == MEMCG_SWAP_FAIL; | |
1120 | ||
1e577f97 | 1121 | atomic_long_inc(&memcg->memory_events_local[event]); |
8b21ca02 MS |
1122 | if (!swap_event) |
1123 | cgroup_file_notify(&memcg->events_local_file); | |
1e577f97 | 1124 | |
9852ae3f CD |
1125 | do { |
1126 | atomic_long_inc(&memcg->memory_events[event]); | |
8b21ca02 MS |
1127 | if (swap_event) |
1128 | cgroup_file_notify(&memcg->swap_events_file); | |
1129 | else | |
1130 | cgroup_file_notify(&memcg->events_file); | |
9852ae3f | 1131 | |
04fd61a4 YS |
1132 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys)) |
1133 | break; | |
9852ae3f CD |
1134 | if (cgrp_dfl_root.flags & CGRP_ROOT_MEMORY_LOCAL_EVENTS) |
1135 | break; | |
1136 | } while ((memcg = parent_mem_cgroup(memcg)) && | |
1137 | !mem_cgroup_is_root(memcg)); | |
c9019e9b JW |
1138 | } |
1139 | ||
fe6bdfc8 RG |
1140 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
1141 | enum memcg_memory_event event) | |
1142 | { | |
1143 | struct mem_cgroup *memcg; | |
1144 | ||
1145 | if (mem_cgroup_disabled()) | |
1146 | return; | |
1147 | ||
1148 | rcu_read_lock(); | |
1149 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
1150 | if (likely(memcg)) | |
1151 | memcg_memory_event(memcg, event); | |
1152 | rcu_read_unlock(); | |
1153 | } | |
1154 | ||
be6c8982 | 1155 | void split_page_memcg(struct page *head, unsigned int nr); |
ca3e0214 | 1156 | |
2d146aa3 JW |
1157 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
1158 | gfp_t gfp_mask, | |
1159 | unsigned long *total_scanned); | |
1160 | ||
c255a458 | 1161 | #else /* CONFIG_MEMCG */ |
23047a96 JW |
1162 | |
1163 | #define MEM_CGROUP_ID_SHIFT 0 | |
1164 | #define MEM_CGROUP_ID_MAX 0 | |
1165 | ||
1b7e4464 MWO |
1166 | static inline struct mem_cgroup *folio_memcg(struct folio *folio) |
1167 | { | |
1168 | return NULL; | |
1169 | } | |
1170 | ||
bcfe06bf RG |
1171 | static inline struct mem_cgroup *page_memcg(struct page *page) |
1172 | { | |
1173 | return NULL; | |
1174 | } | |
1175 | ||
c5ce619a | 1176 | static inline struct mem_cgroup *folio_memcg_rcu(struct folio *folio) |
bcfe06bf RG |
1177 | { |
1178 | WARN_ON_ONCE(!rcu_read_lock_held()); | |
1179 | return NULL; | |
1180 | } | |
1181 | ||
becacb04 MW |
1182 | static inline struct mem_cgroup *folio_memcg_check(struct folio *folio) |
1183 | { | |
1184 | return NULL; | |
1185 | } | |
1186 | ||
bcfe06bf RG |
1187 | static inline struct mem_cgroup *page_memcg_check(struct page *page) |
1188 | { | |
1189 | return NULL; | |
1190 | } | |
1191 | ||
1b7e4464 MWO |
1192 | static inline bool folio_memcg_kmem(struct folio *folio) |
1193 | { | |
1194 | return false; | |
1195 | } | |
1196 | ||
18b2db3b RG |
1197 | static inline bool PageMemcgKmem(struct page *page) |
1198 | { | |
1199 | return false; | |
1200 | } | |
1201 | ||
dfd2f10c KT |
1202 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
1203 | { | |
1204 | return true; | |
1205 | } | |
1206 | ||
23047a96 JW |
1207 | static inline bool mem_cgroup_disabled(void) |
1208 | { | |
1209 | return true; | |
1210 | } | |
1211 | ||
e27be240 JW |
1212 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
1213 | enum memcg_memory_event event) | |
241994ed JW |
1214 | { |
1215 | } | |
1216 | ||
fe6bdfc8 RG |
1217 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
1218 | enum memcg_memory_event event) | |
1219 | { | |
1220 | } | |
1221 | ||
f56ce412 JW |
1222 | static inline void mem_cgroup_protection(struct mem_cgroup *root, |
1223 | struct mem_cgroup *memcg, | |
1224 | unsigned long *min, | |
1225 | unsigned long *low) | |
9783aa99 | 1226 | { |
f56ce412 | 1227 | *min = *low = 0; |
9783aa99 CD |
1228 | } |
1229 | ||
45c7f7e1 CD |
1230 | static inline void mem_cgroup_calculate_protection(struct mem_cgroup *root, |
1231 | struct mem_cgroup *memcg) | |
1232 | { | |
1233 | } | |
1234 | ||
adb82130 YA |
1235 | static inline bool mem_cgroup_unprotected(struct mem_cgroup *target, |
1236 | struct mem_cgroup *memcg) | |
1237 | { | |
1238 | return true; | |
1239 | } | |
1240 | static inline bool mem_cgroup_below_low(struct mem_cgroup *target, | |
1241 | struct mem_cgroup *memcg) | |
45c7f7e1 CD |
1242 | { |
1243 | return false; | |
1244 | } | |
1245 | ||
adb82130 YA |
1246 | static inline bool mem_cgroup_below_min(struct mem_cgroup *target, |
1247 | struct mem_cgroup *memcg) | |
241994ed | 1248 | { |
45c7f7e1 | 1249 | return false; |
241994ed JW |
1250 | } |
1251 | ||
8f425e4e MWO |
1252 | static inline int mem_cgroup_charge(struct folio *folio, |
1253 | struct mm_struct *mm, gfp_t gfp) | |
3fea5a49 JW |
1254 | { |
1255 | return 0; | |
1256 | } | |
1257 | ||
65995918 | 1258 | static inline int mem_cgroup_swapin_charge_folio(struct folio *folio, |
0add0c77 SB |
1259 | struct mm_struct *mm, gfp_t gfp, swp_entry_t entry) |
1260 | { | |
1261 | return 0; | |
1262 | } | |
1263 | ||
1264 | static inline void mem_cgroup_swapin_uncharge_swap(swp_entry_t entry) | |
1265 | { | |
1266 | } | |
1267 | ||
bbc6b703 | 1268 | static inline void mem_cgroup_uncharge(struct folio *folio) |
569b846d KH |
1269 | { |
1270 | } | |
1271 | ||
747db954 | 1272 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
8a9f3ccd BS |
1273 | { |
1274 | } | |
1275 | ||
d21bba2b | 1276 | static inline void mem_cgroup_migrate(struct folio *old, struct folio *new) |
69029cd5 KH |
1277 | { |
1278 | } | |
1279 | ||
867e5e1d JW |
1280 | static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg, |
1281 | struct pglist_data *pgdat) | |
08e552c6 | 1282 | { |
867e5e1d | 1283 | return &pgdat->__lruvec; |
08e552c6 KH |
1284 | } |
1285 | ||
b1baabd9 | 1286 | static inline struct lruvec *folio_lruvec(struct folio *folio) |
66e1707b | 1287 | { |
b1baabd9 | 1288 | struct pglist_data *pgdat = folio_pgdat(folio); |
867e5e1d | 1289 | return &pgdat->__lruvec; |
66e1707b BS |
1290 | } |
1291 | ||
e809c3fe MWO |
1292 | static inline |
1293 | void lruvec_memcg_debug(struct lruvec *lruvec, struct folio *folio) | |
2d146aa3 JW |
1294 | { |
1295 | } | |
1296 | ||
b910718a JW |
1297 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) |
1298 | { | |
1299 | return NULL; | |
1300 | } | |
1301 | ||
587af308 | 1302 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
c0ff4b85 | 1303 | struct mem_cgroup *memcg) |
bed7161a | 1304 | { |
587af308 | 1305 | return true; |
bed7161a BS |
1306 | } |
1307 | ||
d46eb14b SB |
1308 | static inline struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm) |
1309 | { | |
1310 | return NULL; | |
1311 | } | |
1312 | ||
c74d40e8 DS |
1313 | static inline |
1314 | struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css) | |
1315 | { | |
1316 | return NULL; | |
1317 | } | |
1318 | ||
f4840ccf JW |
1319 | static inline void obj_cgroup_put(struct obj_cgroup *objcg) |
1320 | { | |
1321 | } | |
1322 | ||
e4dde56c YZ |
1323 | static inline bool mem_cgroup_tryget(struct mem_cgroup *memcg) |
1324 | { | |
1325 | return true; | |
1326 | } | |
1327 | ||
dc0b5864 RG |
1328 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
1329 | { | |
1330 | } | |
1331 | ||
e809c3fe | 1332 | static inline struct lruvec *folio_lruvec_lock(struct folio *folio) |
6168d0da | 1333 | { |
e809c3fe | 1334 | struct pglist_data *pgdat = folio_pgdat(folio); |
6168d0da AS |
1335 | |
1336 | spin_lock(&pgdat->__lruvec.lru_lock); | |
1337 | return &pgdat->__lruvec; | |
1338 | } | |
1339 | ||
e809c3fe | 1340 | static inline struct lruvec *folio_lruvec_lock_irq(struct folio *folio) |
6168d0da | 1341 | { |
e809c3fe | 1342 | struct pglist_data *pgdat = folio_pgdat(folio); |
6168d0da AS |
1343 | |
1344 | spin_lock_irq(&pgdat->__lruvec.lru_lock); | |
1345 | return &pgdat->__lruvec; | |
1346 | } | |
1347 | ||
e809c3fe | 1348 | static inline struct lruvec *folio_lruvec_lock_irqsave(struct folio *folio, |
6168d0da AS |
1349 | unsigned long *flagsp) |
1350 | { | |
e809c3fe | 1351 | struct pglist_data *pgdat = folio_pgdat(folio); |
6168d0da AS |
1352 | |
1353 | spin_lock_irqsave(&pgdat->__lruvec.lru_lock, *flagsp); | |
1354 | return &pgdat->__lruvec; | |
1355 | } | |
1356 | ||
5660048c JW |
1357 | static inline struct mem_cgroup * |
1358 | mem_cgroup_iter(struct mem_cgroup *root, | |
1359 | struct mem_cgroup *prev, | |
1360 | struct mem_cgroup_reclaim_cookie *reclaim) | |
1361 | { | |
1362 | return NULL; | |
1363 | } | |
1364 | ||
1365 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
1366 | struct mem_cgroup *prev) | |
1367 | { | |
1368 | } | |
1369 | ||
7c5f64f8 VD |
1370 | static inline int mem_cgroup_scan_tasks(struct mem_cgroup *memcg, |
1371 | int (*fn)(struct task_struct *, void *), void *arg) | |
1372 | { | |
1373 | return 0; | |
1374 | } | |
1375 | ||
23047a96 | 1376 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
f8d66542 | 1377 | { |
23047a96 JW |
1378 | return 0; |
1379 | } | |
1380 | ||
1381 | static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id) | |
1382 | { | |
1383 | WARN_ON_ONCE(id); | |
1384 | /* XXX: This should always return root_mem_cgroup */ | |
1385 | return NULL; | |
f8d66542 | 1386 | } |
a636b327 | 1387 | |
c15187a4 RG |
1388 | #ifdef CONFIG_SHRINKER_DEBUG |
1389 | static inline unsigned long mem_cgroup_ino(struct mem_cgroup *memcg) | |
1390 | { | |
1391 | return 0; | |
1392 | } | |
1393 | ||
1394 | static inline struct mem_cgroup *mem_cgroup_get_from_ino(unsigned long ino) | |
1395 | { | |
1396 | return NULL; | |
1397 | } | |
1398 | #endif | |
1399 | ||
aa9694bb CD |
1400 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
1401 | { | |
1402 | return NULL; | |
1403 | } | |
1404 | ||
2262185c RG |
1405 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
1406 | { | |
1407 | return NULL; | |
1408 | } | |
1409 | ||
eb01aaab | 1410 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
14797e23 | 1411 | { |
13308ca9 | 1412 | return true; |
14797e23 KM |
1413 | } |
1414 | ||
b4536f0c MH |
1415 | static inline |
1416 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
1417 | enum lru_list lru, int zone_idx) | |
1418 | { | |
1419 | return 0; | |
1420 | } | |
a3d8e054 | 1421 | |
bbec2e15 | 1422 | static inline unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg) |
7c5f64f8 VD |
1423 | { |
1424 | return 0; | |
1425 | } | |
1426 | ||
9783aa99 CD |
1427 | static inline unsigned long mem_cgroup_size(struct mem_cgroup *memcg) |
1428 | { | |
1429 | return 0; | |
1430 | } | |
1431 | ||
e222432b | 1432 | static inline void |
f0c867d9 | 1433 | mem_cgroup_print_oom_context(struct mem_cgroup *memcg, struct task_struct *p) |
1434 | { | |
1435 | } | |
1436 | ||
1437 | static inline void | |
1438 | mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg) | |
e222432b BS |
1439 | { |
1440 | } | |
1441 | ||
1c824a68 | 1442 | static inline void lock_page_memcg(struct page *page) |
89c06bd5 KH |
1443 | { |
1444 | } | |
1445 | ||
62cccb8c | 1446 | static inline void unlock_page_memcg(struct page *page) |
89c06bd5 KH |
1447 | { |
1448 | } | |
1449 | ||
f70ad448 MWO |
1450 | static inline void folio_memcg_lock(struct folio *folio) |
1451 | { | |
1452 | } | |
1453 | ||
1454 | static inline void folio_memcg_unlock(struct folio *folio) | |
1455 | { | |
1456 | } | |
1457 | ||
018ee47f YZ |
1458 | static inline bool mem_cgroup_trylock_pages(struct mem_cgroup *memcg) |
1459 | { | |
1460 | /* to match folio_memcg_rcu() */ | |
1461 | rcu_read_lock(); | |
1462 | return true; | |
1463 | } | |
1464 | ||
1465 | static inline void mem_cgroup_unlock_pages(void) | |
1466 | { | |
1467 | rcu_read_unlock(); | |
1468 | } | |
1469 | ||
b23afb93 TH |
1470 | static inline void mem_cgroup_handle_over_high(void) |
1471 | { | |
1472 | } | |
1473 | ||
29ef680a | 1474 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 JW |
1475 | { |
1476 | } | |
1477 | ||
29ef680a | 1478 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 JW |
1479 | { |
1480 | } | |
1481 | ||
3812c8c8 JW |
1482 | static inline bool task_in_memcg_oom(struct task_struct *p) |
1483 | { | |
1484 | return false; | |
1485 | } | |
1486 | ||
49426420 | 1487 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
3812c8c8 JW |
1488 | { |
1489 | return false; | |
1490 | } | |
1491 | ||
3d8b38eb RG |
1492 | static inline struct mem_cgroup *mem_cgroup_get_oom_group( |
1493 | struct task_struct *victim, struct mem_cgroup *oom_domain) | |
1494 | { | |
1495 | return NULL; | |
1496 | } | |
1497 | ||
1498 | static inline void mem_cgroup_print_oom_group(struct mem_cgroup *memcg) | |
1499 | { | |
1500 | } | |
1501 | ||
00f3ca2c | 1502 | static inline void __mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1503 | int idx, |
00f3ca2c | 1504 | int nr) |
2a2e4885 JW |
1505 | { |
1506 | } | |
1507 | ||
00f3ca2c | 1508 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1509 | int idx, |
00f3ca2c | 1510 | int nr) |
2a2e4885 JW |
1511 | { |
1512 | } | |
1513 | ||
4e5aa1f4 SB |
1514 | static inline void mod_memcg_page_state(struct page *page, |
1515 | int idx, int val) | |
1516 | { | |
1517 | } | |
1518 | ||
7490a2d2 SB |
1519 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx) |
1520 | { | |
1521 | return 0; | |
1522 | } | |
1523 | ||
42a30035 JW |
1524 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
1525 | enum node_stat_item idx) | |
1526 | { | |
1527 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
1528 | } | |
1529 | ||
205b20cc JW |
1530 | static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
1531 | enum node_stat_item idx) | |
2a7106f2 | 1532 | { |
00f3ca2c | 1533 | return node_page_state(lruvec_pgdat(lruvec), idx); |
2a7106f2 GT |
1534 | } |
1535 | ||
aa48e47e SB |
1536 | static inline void mem_cgroup_flush_stats(void) |
1537 | { | |
1538 | } | |
1539 | ||
9fad9aee YA |
1540 | static inline void mem_cgroup_flush_stats_atomic(void) |
1541 | { | |
1542 | } | |
1543 | ||
4009b2f1 | 1544 | static inline void mem_cgroup_flush_stats_ratelimited(void) |
9b301615 SB |
1545 | { |
1546 | } | |
1547 | ||
eedc4e5a RG |
1548 | static inline void __mod_memcg_lruvec_state(struct lruvec *lruvec, |
1549 | enum node_stat_item idx, int val) | |
1550 | { | |
1551 | } | |
1552 | ||
da3ceeff | 1553 | static inline void __mod_lruvec_kmem_state(void *p, enum node_stat_item idx, |
ec9f0238 RG |
1554 | int val) |
1555 | { | |
1556 | struct page *page = virt_to_head_page(p); | |
1557 | ||
1558 | __mod_node_page_state(page_pgdat(page), idx, val); | |
1559 | } | |
1560 | ||
da3ceeff | 1561 | static inline void mod_lruvec_kmem_state(void *p, enum node_stat_item idx, |
991e7673 SB |
1562 | int val) |
1563 | { | |
1564 | struct page *page = virt_to_head_page(p); | |
1565 | ||
1566 | mod_node_page_state(page_pgdat(page), idx, val); | |
1567 | } | |
1568 | ||
2262185c RG |
1569 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
1570 | enum vm_event_item idx, | |
1571 | unsigned long count) | |
1572 | { | |
1573 | } | |
1574 | ||
9851ac13 KT |
1575 | static inline void __count_memcg_events(struct mem_cgroup *memcg, |
1576 | enum vm_event_item idx, | |
1577 | unsigned long count) | |
1578 | { | |
1579 | } | |
1580 | ||
2262185c | 1581 | static inline void count_memcg_page_event(struct page *page, |
04fecbf5 | 1582 | int idx) |
2262185c RG |
1583 | { |
1584 | } | |
1585 | ||
64daa5d8 MWO |
1586 | static inline void count_memcg_folio_events(struct folio *folio, |
1587 | enum vm_event_item idx, unsigned long nr) | |
1588 | { | |
1589 | } | |
1590 | ||
456f998e | 1591 | static inline |
2262185c | 1592 | void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx) |
456f998e YH |
1593 | { |
1594 | } | |
6168d0da | 1595 | |
2d146aa3 JW |
1596 | static inline void split_page_memcg(struct page *head, unsigned int nr) |
1597 | { | |
1598 | } | |
1599 | ||
1600 | static inline | |
1601 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, | |
1602 | gfp_t gfp_mask, | |
1603 | unsigned long *total_scanned) | |
6168d0da | 1604 | { |
2d146aa3 | 1605 | return 0; |
6168d0da | 1606 | } |
c255a458 | 1607 | #endif /* CONFIG_MEMCG */ |
78fb7466 | 1608 | |
da3ceeff | 1609 | static inline void __inc_lruvec_kmem_state(void *p, enum node_stat_item idx) |
ec9f0238 | 1610 | { |
da3ceeff | 1611 | __mod_lruvec_kmem_state(p, idx, 1); |
ec9f0238 RG |
1612 | } |
1613 | ||
da3ceeff | 1614 | static inline void __dec_lruvec_kmem_state(void *p, enum node_stat_item idx) |
ec9f0238 | 1615 | { |
da3ceeff | 1616 | __mod_lruvec_kmem_state(p, idx, -1); |
ec9f0238 RG |
1617 | } |
1618 | ||
7cf111bc JW |
1619 | static inline struct lruvec *parent_lruvec(struct lruvec *lruvec) |
1620 | { | |
1621 | struct mem_cgroup *memcg; | |
1622 | ||
1623 | memcg = lruvec_memcg(lruvec); | |
1624 | if (!memcg) | |
1625 | return NULL; | |
1626 | memcg = parent_mem_cgroup(memcg); | |
1627 | if (!memcg) | |
1628 | return NULL; | |
1629 | return mem_cgroup_lruvec(memcg, lruvec_pgdat(lruvec)); | |
1630 | } | |
1631 | ||
6168d0da AS |
1632 | static inline void unlock_page_lruvec(struct lruvec *lruvec) |
1633 | { | |
1634 | spin_unlock(&lruvec->lru_lock); | |
1635 | } | |
1636 | ||
1637 | static inline void unlock_page_lruvec_irq(struct lruvec *lruvec) | |
1638 | { | |
1639 | spin_unlock_irq(&lruvec->lru_lock); | |
1640 | } | |
1641 | ||
1642 | static inline void unlock_page_lruvec_irqrestore(struct lruvec *lruvec, | |
1643 | unsigned long flags) | |
1644 | { | |
1645 | spin_unlock_irqrestore(&lruvec->lru_lock, flags); | |
1646 | } | |
1647 | ||
7467c391 | 1648 | /* Test requires a stable page->memcg binding, see page_memcg() */ |
0de340cb MWO |
1649 | static inline bool folio_matches_lruvec(struct folio *folio, |
1650 | struct lruvec *lruvec) | |
f2e4d28d | 1651 | { |
0de340cb MWO |
1652 | return lruvec_pgdat(lruvec) == folio_pgdat(folio) && |
1653 | lruvec_memcg(lruvec) == folio_memcg(folio); | |
f2e4d28d MS |
1654 | } |
1655 | ||
2a5e4e34 | 1656 | /* Don't lock again iff page's lruvec locked */ |
0de340cb | 1657 | static inline struct lruvec *folio_lruvec_relock_irq(struct folio *folio, |
2a5e4e34 AD |
1658 | struct lruvec *locked_lruvec) |
1659 | { | |
1660 | if (locked_lruvec) { | |
0de340cb | 1661 | if (folio_matches_lruvec(folio, locked_lruvec)) |
2a5e4e34 AD |
1662 | return locked_lruvec; |
1663 | ||
1664 | unlock_page_lruvec_irq(locked_lruvec); | |
1665 | } | |
1666 | ||
e809c3fe | 1667 | return folio_lruvec_lock_irq(folio); |
2a5e4e34 AD |
1668 | } |
1669 | ||
1670 | /* Don't lock again iff page's lruvec locked */ | |
0de340cb | 1671 | static inline struct lruvec *folio_lruvec_relock_irqsave(struct folio *folio, |
2a5e4e34 AD |
1672 | struct lruvec *locked_lruvec, unsigned long *flags) |
1673 | { | |
1674 | if (locked_lruvec) { | |
0de340cb | 1675 | if (folio_matches_lruvec(folio, locked_lruvec)) |
2a5e4e34 AD |
1676 | return locked_lruvec; |
1677 | ||
1678 | unlock_page_lruvec_irqrestore(locked_lruvec, *flags); | |
1679 | } | |
1680 | ||
e809c3fe | 1681 | return folio_lruvec_lock_irqsave(folio, flags); |
2a5e4e34 AD |
1682 | } |
1683 | ||
52ebea74 | 1684 | #ifdef CONFIG_CGROUP_WRITEBACK |
841710aa | 1685 | |
841710aa | 1686 | struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb); |
c5edf9cd TH |
1687 | void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages, |
1688 | unsigned long *pheadroom, unsigned long *pdirty, | |
1689 | unsigned long *pwriteback); | |
841710aa | 1690 | |
9d8053fc | 1691 | void mem_cgroup_track_foreign_dirty_slowpath(struct folio *folio, |
97b27821 TH |
1692 | struct bdi_writeback *wb); |
1693 | ||
203a3151 | 1694 | static inline void mem_cgroup_track_foreign_dirty(struct folio *folio, |
97b27821 TH |
1695 | struct bdi_writeback *wb) |
1696 | { | |
ac86f547 KW |
1697 | struct mem_cgroup *memcg; |
1698 | ||
08d1d0e6 BH |
1699 | if (mem_cgroup_disabled()) |
1700 | return; | |
1701 | ||
ac86f547 KW |
1702 | memcg = folio_memcg(folio); |
1703 | if (unlikely(memcg && &memcg->css != wb->memcg_css)) | |
9d8053fc | 1704 | mem_cgroup_track_foreign_dirty_slowpath(folio, wb); |
97b27821 TH |
1705 | } |
1706 | ||
1707 | void mem_cgroup_flush_foreign(struct bdi_writeback *wb); | |
1708 | ||
841710aa TH |
1709 | #else /* CONFIG_CGROUP_WRITEBACK */ |
1710 | ||
1711 | static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb) | |
1712 | { | |
1713 | return NULL; | |
1714 | } | |
1715 | ||
c2aa723a | 1716 | static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb, |
c5edf9cd TH |
1717 | unsigned long *pfilepages, |
1718 | unsigned long *pheadroom, | |
c2aa723a TH |
1719 | unsigned long *pdirty, |
1720 | unsigned long *pwriteback) | |
1721 | { | |
1722 | } | |
1723 | ||
203a3151 | 1724 | static inline void mem_cgroup_track_foreign_dirty(struct folio *folio, |
97b27821 TH |
1725 | struct bdi_writeback *wb) |
1726 | { | |
1727 | } | |
1728 | ||
1729 | static inline void mem_cgroup_flush_foreign(struct bdi_writeback *wb) | |
1730 | { | |
1731 | } | |
1732 | ||
841710aa | 1733 | #endif /* CONFIG_CGROUP_WRITEBACK */ |
52ebea74 | 1734 | |
e1aab161 | 1735 | struct sock; |
4b1327be WW |
1736 | bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages, |
1737 | gfp_t gfp_mask); | |
baac50bb | 1738 | void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); |
d886f4e4 | 1739 | #ifdef CONFIG_MEMCG |
ef12947c JW |
1740 | extern struct static_key_false memcg_sockets_enabled_key; |
1741 | #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key) | |
2d758073 JW |
1742 | void mem_cgroup_sk_alloc(struct sock *sk); |
1743 | void mem_cgroup_sk_free(struct sock *sk); | |
baac50bb | 1744 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c | 1745 | { |
0db15298 | 1746 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && memcg->tcpmem_pressure) |
8e8ae645 | 1747 | return true; |
8e8ae645 | 1748 | do { |
7e6ec49c | 1749 | if (time_before(jiffies, READ_ONCE(memcg->socket_pressure))) |
8e8ae645 JW |
1750 | return true; |
1751 | } while ((memcg = parent_mem_cgroup(memcg))); | |
1752 | return false; | |
e805605c | 1753 | } |
0a432dcb | 1754 | |
e4262c4f YS |
1755 | int alloc_shrinker_info(struct mem_cgroup *memcg); |
1756 | void free_shrinker_info(struct mem_cgroup *memcg); | |
2bfd3637 | 1757 | void set_shrinker_bit(struct mem_cgroup *memcg, int nid, int shrinker_id); |
a178015c | 1758 | void reparent_shrinker_deferred(struct mem_cgroup *memcg); |
e805605c | 1759 | #else |
80e95fe0 | 1760 | #define mem_cgroup_sockets_enabled 0 |
2d758073 JW |
1761 | static inline void mem_cgroup_sk_alloc(struct sock *sk) { }; |
1762 | static inline void mem_cgroup_sk_free(struct sock *sk) { }; | |
baac50bb | 1763 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c JW |
1764 | { |
1765 | return false; | |
1766 | } | |
0a432dcb | 1767 | |
2bfd3637 YS |
1768 | static inline void set_shrinker_bit(struct mem_cgroup *memcg, |
1769 | int nid, int shrinker_id) | |
0a432dcb YS |
1770 | { |
1771 | } | |
e805605c | 1772 | #endif |
7ae1e1d0 | 1773 | |
9b6f7e16 | 1774 | #ifdef CONFIG_MEMCG_KMEM |
4d5c8aed | 1775 | bool mem_cgroup_kmem_disabled(void); |
f4b00eab RG |
1776 | int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, int order); |
1777 | void __memcg_kmem_uncharge_page(struct page *page, int order); | |
45264778 | 1778 | |
bf4f0599 | 1779 | struct obj_cgroup *get_obj_cgroup_from_current(void); |
f4840ccf | 1780 | struct obj_cgroup *get_obj_cgroup_from_page(struct page *page); |
bf4f0599 RG |
1781 | |
1782 | int obj_cgroup_charge(struct obj_cgroup *objcg, gfp_t gfp, size_t size); | |
1783 | void obj_cgroup_uncharge(struct obj_cgroup *objcg, size_t size); | |
1784 | ||
b6c1a8af YS |
1785 | extern struct static_key_false memcg_bpf_enabled_key; |
1786 | static inline bool memcg_bpf_enabled(void) | |
1787 | { | |
1788 | return static_branch_likely(&memcg_bpf_enabled_key); | |
1789 | } | |
1790 | ||
f7a449f7 | 1791 | extern struct static_key_false memcg_kmem_online_key; |
749c5415 | 1792 | |
f7a449f7 | 1793 | static inline bool memcg_kmem_online(void) |
7ae1e1d0 | 1794 | { |
f7a449f7 | 1795 | return static_branch_likely(&memcg_kmem_online_key); |
7ae1e1d0 GC |
1796 | } |
1797 | ||
f4b00eab RG |
1798 | static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1799 | int order) | |
60cd4bcd | 1800 | { |
f7a449f7 | 1801 | if (memcg_kmem_online()) |
f4b00eab | 1802 | return __memcg_kmem_charge_page(page, gfp, order); |
60cd4bcd SB |
1803 | return 0; |
1804 | } | |
1805 | ||
f4b00eab | 1806 | static inline void memcg_kmem_uncharge_page(struct page *page, int order) |
60cd4bcd | 1807 | { |
f7a449f7 | 1808 | if (memcg_kmem_online()) |
f4b00eab | 1809 | __memcg_kmem_uncharge_page(page, order); |
60cd4bcd SB |
1810 | } |
1811 | ||
33398cf2 | 1812 | /* |
a7cb874b RG |
1813 | * A helper for accessing memcg's kmem_id, used for getting |
1814 | * corresponding LRU lists. | |
33398cf2 | 1815 | */ |
7c52f65d | 1816 | static inline int memcg_kmem_id(struct mem_cgroup *memcg) |
33398cf2 MH |
1817 | { |
1818 | return memcg ? memcg->kmemcg_id : -1; | |
1819 | } | |
5722d094 | 1820 | |
8380ce47 | 1821 | struct mem_cgroup *mem_cgroup_from_obj(void *p); |
fc4db90f | 1822 | struct mem_cgroup *mem_cgroup_from_slab_obj(void *p); |
8380ce47 | 1823 | |
f4840ccf JW |
1824 | static inline void count_objcg_event(struct obj_cgroup *objcg, |
1825 | enum vm_event_item idx) | |
1826 | { | |
1827 | struct mem_cgroup *memcg; | |
1828 | ||
f7a449f7 | 1829 | if (!memcg_kmem_online()) |
f4840ccf JW |
1830 | return; |
1831 | ||
1832 | rcu_read_lock(); | |
1833 | memcg = obj_cgroup_memcg(objcg); | |
1834 | count_memcg_events(memcg, idx, 1); | |
1835 | rcu_read_unlock(); | |
1836 | } | |
1837 | ||
7ae1e1d0 | 1838 | #else |
4d5c8aed RG |
1839 | static inline bool mem_cgroup_kmem_disabled(void) |
1840 | { | |
1841 | return true; | |
1842 | } | |
9b6f7e16 | 1843 | |
f4b00eab RG |
1844 | static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1845 | int order) | |
9b6f7e16 RG |
1846 | { |
1847 | return 0; | |
1848 | } | |
1849 | ||
f4b00eab | 1850 | static inline void memcg_kmem_uncharge_page(struct page *page, int order) |
9b6f7e16 RG |
1851 | { |
1852 | } | |
1853 | ||
f4b00eab RG |
1854 | static inline int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1855 | int order) | |
60cd4bcd SB |
1856 | { |
1857 | return 0; | |
1858 | } | |
1859 | ||
f4b00eab | 1860 | static inline void __memcg_kmem_uncharge_page(struct page *page, int order) |
60cd4bcd SB |
1861 | { |
1862 | } | |
1863 | ||
f4840ccf JW |
1864 | static inline struct obj_cgroup *get_obj_cgroup_from_page(struct page *page) |
1865 | { | |
1866 | return NULL; | |
1867 | } | |
1868 | ||
b6c1a8af YS |
1869 | static inline bool memcg_bpf_enabled(void) |
1870 | { | |
1871 | return false; | |
1872 | } | |
1873 | ||
f7a449f7 | 1874 | static inline bool memcg_kmem_online(void) |
b9ce5ef4 GC |
1875 | { |
1876 | return false; | |
1877 | } | |
1878 | ||
7c52f65d | 1879 | static inline int memcg_kmem_id(struct mem_cgroup *memcg) |
2633d7a0 GC |
1880 | { |
1881 | return -1; | |
1882 | } | |
1883 | ||
8380ce47 RG |
1884 | static inline struct mem_cgroup *mem_cgroup_from_obj(void *p) |
1885 | { | |
1d0403d2 | 1886 | return NULL; |
8380ce47 RG |
1887 | } |
1888 | ||
fc4db90f RG |
1889 | static inline struct mem_cgroup *mem_cgroup_from_slab_obj(void *p) |
1890 | { | |
1891 | return NULL; | |
1892 | } | |
1893 | ||
f4840ccf JW |
1894 | static inline void count_objcg_event(struct obj_cgroup *objcg, |
1895 | enum vm_event_item idx) | |
1896 | { | |
1897 | } | |
1898 | ||
84c07d11 | 1899 | #endif /* CONFIG_MEMCG_KMEM */ |
127424c8 | 1900 | |
f4840ccf JW |
1901 | #if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_ZSWAP) |
1902 | bool obj_cgroup_may_zswap(struct obj_cgroup *objcg); | |
1903 | void obj_cgroup_charge_zswap(struct obj_cgroup *objcg, size_t size); | |
1904 | void obj_cgroup_uncharge_zswap(struct obj_cgroup *objcg, size_t size); | |
1905 | #else | |
1906 | static inline bool obj_cgroup_may_zswap(struct obj_cgroup *objcg) | |
1907 | { | |
1908 | return true; | |
1909 | } | |
1910 | static inline void obj_cgroup_charge_zswap(struct obj_cgroup *objcg, | |
1911 | size_t size) | |
1912 | { | |
1913 | } | |
1914 | static inline void obj_cgroup_uncharge_zswap(struct obj_cgroup *objcg, | |
1915 | size_t size) | |
1916 | { | |
1917 | } | |
1918 | #endif | |
1919 | ||
8cdea7c0 | 1920 | #endif /* _LINUX_MEMCONTROL_H */ |