Commit | Line | Data |
---|---|---|
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 | |
71cd3113 JW |
64 | |
65 | struct mem_cgroup_id { | |
66 | int id; | |
1c2d479a | 67 | refcount_t ref; |
71cd3113 JW |
68 | }; |
69 | ||
33398cf2 MH |
70 | /* |
71 | * Per memcg event counter is incremented at every pagein/pageout. With THP, | |
0845f831 RD |
72 | * it will be incremented by the number of pages. This counter is used |
73 | * to trigger some periodic events. This is straightforward and better | |
33398cf2 MH |
74 | * than using jiffies etc. to handle periodic memcg event. |
75 | */ | |
76 | enum mem_cgroup_events_target { | |
77 | MEM_CGROUP_TARGET_THRESH, | |
78 | MEM_CGROUP_TARGET_SOFTLIMIT, | |
33398cf2 MH |
79 | MEM_CGROUP_NTARGETS, |
80 | }; | |
81 | ||
410f8e82 SB |
82 | struct memcg_vmstats_percpu; |
83 | struct memcg_vmstats; | |
33398cf2 MH |
84 | |
85 | struct mem_cgroup_reclaim_iter { | |
86 | struct mem_cgroup *position; | |
87 | /* scan generation, increased every round-trip */ | |
88 | unsigned int generation; | |
89 | }; | |
90 | ||
0a4465d3 | 91 | /* |
3c6f17e6 YS |
92 | * Bitmap and deferred work of shrinker::id corresponding to memcg-aware |
93 | * shrinkers, which have elements charged to this memcg. | |
0a4465d3 | 94 | */ |
e4262c4f | 95 | struct shrinker_info { |
0a4465d3 | 96 | struct rcu_head rcu; |
3c6f17e6 YS |
97 | atomic_long_t *nr_deferred; |
98 | unsigned long *map; | |
42c9db39 | 99 | int map_nr_max; |
0a4465d3 KT |
100 | }; |
101 | ||
7e1c0d6f SB |
102 | struct lruvec_stats_percpu { |
103 | /* Local (CPU and cgroup) state */ | |
104 | long state[NR_VM_NODE_STAT_ITEMS]; | |
105 | ||
106 | /* Delta calculation for lockless upward propagation */ | |
107 | long state_prev[NR_VM_NODE_STAT_ITEMS]; | |
108 | }; | |
109 | ||
110 | struct lruvec_stats { | |
111 | /* Aggregated (CPU and subtree) state */ | |
112 | long state[NR_VM_NODE_STAT_ITEMS]; | |
113 | ||
f82e6bf9 YA |
114 | /* Non-hierarchical (CPU aggregated) state */ |
115 | long state_local[NR_VM_NODE_STAT_ITEMS]; | |
116 | ||
7e1c0d6f SB |
117 | /* Pending child counts during tree propagation */ |
118 | long state_pending[NR_VM_NODE_STAT_ITEMS]; | |
119 | }; | |
120 | ||
33398cf2 | 121 | /* |
242c37b4 | 122 | * per-node information in memory controller. |
33398cf2 | 123 | */ |
ef8f2327 | 124 | struct mem_cgroup_per_node { |
33398cf2 | 125 | struct lruvec lruvec; |
a983b5eb | 126 | |
7e1c0d6f SB |
127 | struct lruvec_stats_percpu __percpu *lruvec_stats_percpu; |
128 | struct lruvec_stats lruvec_stats; | |
a983b5eb | 129 | |
b4536f0c | 130 | unsigned long lru_zone_size[MAX_NR_ZONES][NR_LRU_LISTS]; |
33398cf2 | 131 | |
9da83f3f | 132 | struct mem_cgroup_reclaim_iter iter; |
33398cf2 | 133 | |
e4262c4f | 134 | struct shrinker_info __rcu *shrinker_info; |
0a432dcb | 135 | |
33398cf2 MH |
136 | struct rb_node tree_node; /* RB tree node */ |
137 | unsigned long usage_in_excess;/* Set to the value by which */ | |
138 | /* the soft limit is exceeded*/ | |
139 | bool on_tree; | |
140 | struct mem_cgroup *memcg; /* Back pointer, we cannot */ | |
141 | /* use container_of */ | |
142 | }; | |
143 | ||
33398cf2 MH |
144 | struct mem_cgroup_threshold { |
145 | struct eventfd_ctx *eventfd; | |
146 | unsigned long threshold; | |
147 | }; | |
148 | ||
149 | /* For threshold */ | |
150 | struct mem_cgroup_threshold_ary { | |
151 | /* An array index points to threshold just below or equal to usage. */ | |
152 | int current_threshold; | |
153 | /* Size of entries[] */ | |
154 | unsigned int size; | |
155 | /* Array of thresholds */ | |
307ed94c | 156 | struct mem_cgroup_threshold entries[]; |
33398cf2 MH |
157 | }; |
158 | ||
159 | struct mem_cgroup_thresholds { | |
160 | /* Primary thresholds array */ | |
161 | struct mem_cgroup_threshold_ary *primary; | |
162 | /* | |
163 | * Spare threshold array. | |
164 | * This is needed to make mem_cgroup_unregister_event() "never fail". | |
165 | * It must be able to store at least primary->size - 1 entries. | |
166 | */ | |
167 | struct mem_cgroup_threshold_ary *spare; | |
168 | }; | |
169 | ||
97b27821 TH |
170 | /* |
171 | * Remember four most recent foreign writebacks with dirty pages in this | |
172 | * cgroup. Inode sharing is expected to be uncommon and, even if we miss | |
173 | * one in a given round, we're likely to catch it later if it keeps | |
174 | * foreign-dirtying, so a fairly low count should be enough. | |
175 | * | |
176 | * See mem_cgroup_track_foreign_dirty_slowpath() for details. | |
177 | */ | |
178 | #define MEMCG_CGWB_FRN_CNT 4 | |
179 | ||
180 | struct memcg_cgwb_frn { | |
181 | u64 bdi_id; /* bdi->id of the foreign inode */ | |
182 | int memcg_id; /* memcg->css.id of foreign inode */ | |
183 | u64 at; /* jiffies_64 at the time of dirtying */ | |
184 | struct wb_completion done; /* tracks in-flight foreign writebacks */ | |
185 | }; | |
186 | ||
bf4f0599 RG |
187 | /* |
188 | * Bucket for arbitrarily byte-sized objects charged to a memory | |
189 | * cgroup. The bucket can be reparented in one piece when the cgroup | |
190 | * is destroyed, without having to round up the individual references | |
191 | * of all live memory objects in the wild. | |
192 | */ | |
193 | struct obj_cgroup { | |
194 | struct percpu_ref refcnt; | |
195 | struct mem_cgroup *memcg; | |
196 | atomic_t nr_charged_bytes; | |
197 | union { | |
0764db9b | 198 | struct list_head list; /* protected by objcg_lock */ |
bf4f0599 RG |
199 | struct rcu_head rcu; |
200 | }; | |
201 | }; | |
202 | ||
33398cf2 MH |
203 | /* |
204 | * The memory controller data structure. The memory controller controls both | |
205 | * page cache and RSS per cgroup. We would eventually like to provide | |
206 | * statistics based on the statistics developed by Rik Van Riel for clock-pro, | |
207 | * to help the administrator determine what knobs to tune. | |
208 | */ | |
209 | struct mem_cgroup { | |
210 | struct cgroup_subsys_state css; | |
211 | ||
73f576c0 JW |
212 | /* Private memcg ID. Used to ID objects that outlive the cgroup */ |
213 | struct mem_cgroup_id id; | |
214 | ||
33398cf2 | 215 | /* Accounted resources */ |
bd0b230f WL |
216 | struct page_counter memory; /* Both v1 & v2 */ |
217 | ||
218 | union { | |
219 | struct page_counter swap; /* v2 only */ | |
220 | struct page_counter memsw; /* v1 only */ | |
221 | }; | |
0db15298 JW |
222 | |
223 | /* Legacy consumer-oriented counters */ | |
bd0b230f WL |
224 | struct page_counter kmem; /* v1 only */ |
225 | struct page_counter tcpmem; /* v1 only */ | |
33398cf2 | 226 | |
f7e1cb6e JW |
227 | /* Range enforcement for interrupt charges */ |
228 | struct work_struct high_work; | |
229 | ||
f4840ccf JW |
230 | #if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_ZSWAP) |
231 | unsigned long zswap_max; | |
232 | #endif | |
233 | ||
33398cf2 MH |
234 | unsigned long soft_limit; |
235 | ||
236 | /* vmpressure notifications */ | |
237 | struct vmpressure vmpressure; | |
238 | ||
3d8b38eb RG |
239 | /* |
240 | * Should the OOM killer kill all belonging tasks, had it kill one? | |
241 | */ | |
242 | bool oom_group; | |
243 | ||
33398cf2 MH |
244 | /* protected by memcg_oom_lock */ |
245 | bool oom_lock; | |
246 | int under_oom; | |
247 | ||
248 | int swappiness; | |
249 | /* OOM-Killer disable */ | |
250 | int oom_kill_disable; | |
251 | ||
1e577f97 | 252 | /* memory.events and memory.events.local */ |
472912a2 | 253 | struct cgroup_file events_file; |
1e577f97 | 254 | struct cgroup_file events_local_file; |
472912a2 | 255 | |
f3a53a3a TH |
256 | /* handle for "memory.swap.events" */ |
257 | struct cgroup_file swap_events_file; | |
258 | ||
33398cf2 MH |
259 | /* protect arrays of thresholds */ |
260 | struct mutex thresholds_lock; | |
261 | ||
262 | /* thresholds for memory usage. RCU-protected */ | |
263 | struct mem_cgroup_thresholds thresholds; | |
264 | ||
265 | /* thresholds for mem+swap usage. RCU-protected */ | |
266 | struct mem_cgroup_thresholds memsw_thresholds; | |
267 | ||
268 | /* For oom notifier event fd */ | |
269 | struct list_head oom_notify; | |
270 | ||
271 | /* | |
272 | * Should we move charges of a task when a task is moved into this | |
273 | * mem_cgroup ? And what type of charges should we move ? | |
274 | */ | |
275 | unsigned long move_charge_at_immigrate; | |
e81bf979 AL |
276 | /* taken only while moving_account > 0 */ |
277 | spinlock_t move_lock; | |
278 | unsigned long move_lock_flags; | |
279 | ||
e6ad640b | 280 | CACHELINE_PADDING(_pad1_); |
e81bf979 | 281 | |
2d146aa3 | 282 | /* memory.stat */ |
410f8e82 | 283 | struct memcg_vmstats *vmstats; |
42a30035 | 284 | |
815744d7 | 285 | /* memory.events */ |
42a30035 | 286 | atomic_long_t memory_events[MEMCG_NR_MEMORY_EVENTS]; |
1e577f97 | 287 | atomic_long_t memory_events_local[MEMCG_NR_MEMORY_EVENTS]; |
33398cf2 | 288 | |
ac8a5296 AW |
289 | /* |
290 | * Hint of reclaim pressure for socket memroy management. Note | |
291 | * that this indicator should NOT be used in legacy cgroup mode | |
292 | * where socket memory is accounted/charged separately. | |
293 | */ | |
d886f4e4 JW |
294 | unsigned long socket_pressure; |
295 | ||
296 | /* Legacy tcp memory accounting */ | |
0db15298 JW |
297 | bool tcpmem_active; |
298 | int tcpmem_pressure; | |
d886f4e4 | 299 | |
84c07d11 | 300 | #ifdef CONFIG_MEMCG_KMEM |
33398cf2 | 301 | int kmemcg_id; |
bf4f0599 | 302 | struct obj_cgroup __rcu *objcg; |
0764db9b RG |
303 | /* list of inherited objcgs, protected by objcg_lock */ |
304 | struct list_head objcg_list; | |
33398cf2 MH |
305 | #endif |
306 | ||
e6ad640b | 307 | CACHELINE_PADDING(_pad2_); |
4df91062 FT |
308 | |
309 | /* | |
310 | * set > 0 if pages under this cgroup are moving to other cgroup. | |
311 | */ | |
312 | atomic_t moving_account; | |
313 | struct task_struct *move_lock_task; | |
314 | ||
4df91062 FT |
315 | struct memcg_vmstats_percpu __percpu *vmstats_percpu; |
316 | ||
33398cf2 MH |
317 | #ifdef CONFIG_CGROUP_WRITEBACK |
318 | struct list_head cgwb_list; | |
319 | struct wb_domain cgwb_domain; | |
97b27821 | 320 | struct memcg_cgwb_frn cgwb_frn[MEMCG_CGWB_FRN_CNT]; |
33398cf2 MH |
321 | #endif |
322 | ||
323 | /* List of events which userspace want to receive */ | |
324 | struct list_head event_list; | |
325 | spinlock_t event_list_lock; | |
326 | ||
87eaceb3 YS |
327 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
328 | struct deferred_split deferred_split_queue; | |
329 | #endif | |
330 | ||
bd74fdae YZ |
331 | #ifdef CONFIG_LRU_GEN |
332 | /* per-memcg mm_struct list */ | |
333 | struct lru_gen_mm_list mm_list; | |
334 | #endif | |
335 | ||
b51478a0 | 336 | struct mem_cgroup_per_node *nodeinfo[]; |
33398cf2 | 337 | }; |
7d828602 | 338 | |
a983b5eb | 339 | /* |
1813e51e SB |
340 | * size of first charge trial. |
341 | * TODO: maybe necessary to use big numbers in big irons or dynamic based of the | |
342 | * workload. | |
a983b5eb | 343 | */ |
1813e51e | 344 | #define MEMCG_CHARGE_BATCH 64U |
a983b5eb | 345 | |
7d828602 | 346 | extern struct mem_cgroup *root_mem_cgroup; |
56161634 | 347 | |
87944e29 RG |
348 | enum page_memcg_data_flags { |
349 | /* page->memcg_data is a pointer to an objcgs vector */ | |
350 | MEMCG_DATA_OBJCGS = (1UL << 0), | |
18b2db3b RG |
351 | /* page has been accounted as a non-slab kernel page */ |
352 | MEMCG_DATA_KMEM = (1UL << 1), | |
87944e29 | 353 | /* the next bit after the last actual flag */ |
18b2db3b | 354 | __NR_MEMCG_DATA_FLAGS = (1UL << 2), |
87944e29 RG |
355 | }; |
356 | ||
357 | #define MEMCG_DATA_FLAGS_MASK (__NR_MEMCG_DATA_FLAGS - 1) | |
358 | ||
1b7e4464 | 359 | static inline bool folio_memcg_kmem(struct folio *folio); |
b4e0b68f MS |
360 | |
361 | /* | |
362 | * After the initialization objcg->memcg is always pointing at | |
363 | * a valid memcg, but can be atomically swapped to the parent memcg. | |
364 | * | |
365 | * The caller must ensure that the returned memcg won't be released: | |
366 | * e.g. acquire the rcu_read_lock or css_set_lock. | |
367 | */ | |
368 | static inline struct mem_cgroup *obj_cgroup_memcg(struct obj_cgroup *objcg) | |
369 | { | |
370 | return READ_ONCE(objcg->memcg); | |
371 | } | |
372 | ||
373 | /* | |
1b7e4464 MWO |
374 | * __folio_memcg - Get the memory cgroup associated with a non-kmem folio |
375 | * @folio: Pointer to the folio. | |
b4e0b68f | 376 | * |
1b7e4464 MWO |
377 | * Returns a pointer to the memory cgroup associated with the folio, |
378 | * or NULL. This function assumes that the folio is known to have a | |
b4e0b68f | 379 | * proper memory cgroup pointer. It's not safe to call this function |
1b7e4464 MWO |
380 | * against some type of folios, e.g. slab folios or ex-slab folios or |
381 | * kmem folios. | |
b4e0b68f | 382 | */ |
1b7e4464 | 383 | static inline struct mem_cgroup *__folio_memcg(struct folio *folio) |
b4e0b68f | 384 | { |
1b7e4464 | 385 | unsigned long memcg_data = folio->memcg_data; |
b4e0b68f | 386 | |
1b7e4464 MWO |
387 | VM_BUG_ON_FOLIO(folio_test_slab(folio), folio); |
388 | VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_OBJCGS, folio); | |
389 | VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_KMEM, folio); | |
b4e0b68f MS |
390 | |
391 | return (struct mem_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); | |
392 | } | |
393 | ||
394 | /* | |
1b7e4464 MWO |
395 | * __folio_objcg - get the object cgroup associated with a kmem folio. |
396 | * @folio: Pointer to the folio. | |
b4e0b68f | 397 | * |
1b7e4464 MWO |
398 | * Returns a pointer to the object cgroup associated with the folio, |
399 | * or NULL. This function assumes that the folio is known to have a | |
b4e0b68f | 400 | * proper object cgroup pointer. It's not safe to call this function |
1b7e4464 MWO |
401 | * against some type of folios, e.g. slab folios or ex-slab folios or |
402 | * LRU folios. | |
b4e0b68f | 403 | */ |
1b7e4464 | 404 | static inline struct obj_cgroup *__folio_objcg(struct folio *folio) |
b4e0b68f | 405 | { |
1b7e4464 | 406 | unsigned long memcg_data = folio->memcg_data; |
b4e0b68f | 407 | |
1b7e4464 MWO |
408 | VM_BUG_ON_FOLIO(folio_test_slab(folio), folio); |
409 | VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_OBJCGS, folio); | |
410 | VM_BUG_ON_FOLIO(!(memcg_data & MEMCG_DATA_KMEM), folio); | |
b4e0b68f MS |
411 | |
412 | return (struct obj_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); | |
413 | } | |
414 | ||
bcfe06bf | 415 | /* |
1b7e4464 MWO |
416 | * folio_memcg - Get the memory cgroup associated with a folio. |
417 | * @folio: Pointer to the folio. | |
bcfe06bf | 418 | * |
1b7e4464 MWO |
419 | * Returns a pointer to the memory cgroup associated with the folio, |
420 | * or NULL. This function assumes that the folio is known to have a | |
bcfe06bf | 421 | * proper memory cgroup pointer. It's not safe to call this function |
1b7e4464 | 422 | * against some type of folios, e.g. slab folios or ex-slab folios. |
bcfe06bf | 423 | * |
1b7e4464 | 424 | * For a non-kmem folio any of the following ensures folio and memcg binding |
b4e0b68f MS |
425 | * stability: |
426 | * | |
1b7e4464 | 427 | * - the folio lock |
bcfe06bf | 428 | * - LRU isolation |
6c77b607 | 429 | * - folio_memcg_lock() |
bcfe06bf | 430 | * - exclusive reference |
018ee47f | 431 | * - mem_cgroup_trylock_pages() |
b4e0b68f | 432 | * |
1b7e4464 MWO |
433 | * For a kmem folio a caller should hold an rcu read lock to protect memcg |
434 | * associated with a kmem folio from being released. | |
bcfe06bf | 435 | */ |
1b7e4464 MWO |
436 | static inline struct mem_cgroup *folio_memcg(struct folio *folio) |
437 | { | |
438 | if (folio_memcg_kmem(folio)) | |
439 | return obj_cgroup_memcg(__folio_objcg(folio)); | |
440 | return __folio_memcg(folio); | |
441 | } | |
442 | ||
bcfe06bf RG |
443 | static inline struct mem_cgroup *page_memcg(struct page *page) |
444 | { | |
1b7e4464 | 445 | return folio_memcg(page_folio(page)); |
bcfe06bf RG |
446 | } |
447 | ||
c5ce619a MWO |
448 | /** |
449 | * folio_memcg_rcu - Locklessly get the memory cgroup associated with a folio. | |
450 | * @folio: Pointer to the folio. | |
bcfe06bf | 451 | * |
c5ce619a | 452 | * This function assumes that the folio is known to have a |
bcfe06bf | 453 | * proper memory cgroup pointer. It's not safe to call this function |
c5ce619a MWO |
454 | * against some type of folios, e.g. slab folios or ex-slab folios. |
455 | * | |
456 | * Return: A pointer to the memory cgroup associated with the folio, | |
457 | * or NULL. | |
bcfe06bf | 458 | */ |
c5ce619a | 459 | static inline struct mem_cgroup *folio_memcg_rcu(struct folio *folio) |
bcfe06bf | 460 | { |
c5ce619a | 461 | unsigned long memcg_data = READ_ONCE(folio->memcg_data); |
b4e0b68f | 462 | |
c5ce619a | 463 | VM_BUG_ON_FOLIO(folio_test_slab(folio), folio); |
bcfe06bf RG |
464 | WARN_ON_ONCE(!rcu_read_lock_held()); |
465 | ||
b4e0b68f MS |
466 | if (memcg_data & MEMCG_DATA_KMEM) { |
467 | struct obj_cgroup *objcg; | |
468 | ||
469 | objcg = (void *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); | |
470 | return obj_cgroup_memcg(objcg); | |
471 | } | |
472 | ||
473 | return (struct mem_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); | |
bcfe06bf RG |
474 | } |
475 | ||
476 | /* | |
becacb04 MW |
477 | * folio_memcg_check - Get the memory cgroup associated with a folio. |
478 | * @folio: Pointer to the folio. | |
bcfe06bf | 479 | * |
becacb04 MW |
480 | * Returns a pointer to the memory cgroup associated with the folio, |
481 | * or NULL. This function unlike folio_memcg() can take any folio | |
482 | * as an argument. It has to be used in cases when it's not known if a folio | |
b4e0b68f MS |
483 | * has an associated memory cgroup pointer or an object cgroups vector or |
484 | * an object cgroup. | |
485 | * | |
becacb04 | 486 | * For a non-kmem folio any of the following ensures folio and memcg binding |
b4e0b68f | 487 | * stability: |
bcfe06bf | 488 | * |
becacb04 | 489 | * - the folio lock |
bcfe06bf | 490 | * - LRU isolation |
becacb04 | 491 | * - lock_folio_memcg() |
bcfe06bf | 492 | * - exclusive reference |
018ee47f | 493 | * - mem_cgroup_trylock_pages() |
b4e0b68f | 494 | * |
becacb04 MW |
495 | * For a kmem folio a caller should hold an rcu read lock to protect memcg |
496 | * associated with a kmem folio from being released. | |
bcfe06bf | 497 | */ |
becacb04 | 498 | static inline struct mem_cgroup *folio_memcg_check(struct folio *folio) |
bcfe06bf RG |
499 | { |
500 | /* | |
becacb04 MW |
501 | * Because folio->memcg_data might be changed asynchronously |
502 | * for slabs, READ_ONCE() should be used here. | |
bcfe06bf | 503 | */ |
becacb04 | 504 | unsigned long memcg_data = READ_ONCE(folio->memcg_data); |
bcfe06bf | 505 | |
87944e29 | 506 | if (memcg_data & MEMCG_DATA_OBJCGS) |
bcfe06bf RG |
507 | return NULL; |
508 | ||
b4e0b68f MS |
509 | if (memcg_data & MEMCG_DATA_KMEM) { |
510 | struct obj_cgroup *objcg; | |
511 | ||
512 | objcg = (void *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); | |
513 | return obj_cgroup_memcg(objcg); | |
514 | } | |
515 | ||
18b2db3b RG |
516 | return (struct mem_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); |
517 | } | |
518 | ||
becacb04 MW |
519 | static inline struct mem_cgroup *page_memcg_check(struct page *page) |
520 | { | |
521 | if (PageTail(page)) | |
522 | return NULL; | |
523 | return folio_memcg_check((struct folio *)page); | |
524 | } | |
525 | ||
88f2ef73 MS |
526 | static inline struct mem_cgroup *get_mem_cgroup_from_objcg(struct obj_cgroup *objcg) |
527 | { | |
528 | struct mem_cgroup *memcg; | |
529 | ||
530 | rcu_read_lock(); | |
531 | retry: | |
532 | memcg = obj_cgroup_memcg(objcg); | |
533 | if (unlikely(!css_tryget(&memcg->css))) | |
534 | goto retry; | |
535 | rcu_read_unlock(); | |
536 | ||
537 | return memcg; | |
538 | } | |
539 | ||
bd290e1e | 540 | #ifdef CONFIG_MEMCG_KMEM |
18b2db3b | 541 | /* |
1b7e4464 MWO |
542 | * folio_memcg_kmem - Check if the folio has the memcg_kmem flag set. |
543 | * @folio: Pointer to the folio. | |
18b2db3b | 544 | * |
1b7e4464 MWO |
545 | * Checks if the folio has MemcgKmem flag set. The caller must ensure |
546 | * that the folio has an associated memory cgroup. It's not safe to call | |
547 | * this function against some types of folios, e.g. slab folios. | |
18b2db3b | 548 | */ |
1b7e4464 | 549 | static inline bool folio_memcg_kmem(struct folio *folio) |
18b2db3b | 550 | { |
1b7e4464 MWO |
551 | VM_BUG_ON_PGFLAGS(PageTail(&folio->page), &folio->page); |
552 | VM_BUG_ON_FOLIO(folio->memcg_data & MEMCG_DATA_OBJCGS, folio); | |
553 | return folio->memcg_data & MEMCG_DATA_KMEM; | |
bcfe06bf RG |
554 | } |
555 | ||
270c6a71 | 556 | |
270c6a71 | 557 | #else |
1b7e4464 | 558 | static inline bool folio_memcg_kmem(struct folio *folio) |
bd290e1e MS |
559 | { |
560 | return false; | |
561 | } | |
562 | ||
270c6a71 RG |
563 | #endif |
564 | ||
1b7e4464 MWO |
565 | static inline bool PageMemcgKmem(struct page *page) |
566 | { | |
567 | return folio_memcg_kmem(page_folio(page)); | |
568 | } | |
569 | ||
dfd2f10c KT |
570 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
571 | { | |
572 | return (memcg == root_mem_cgroup); | |
573 | } | |
574 | ||
23047a96 JW |
575 | static inline bool mem_cgroup_disabled(void) |
576 | { | |
577 | return !cgroup_subsys_enabled(memory_cgrp_subsys); | |
578 | } | |
579 | ||
f56ce412 JW |
580 | static inline void mem_cgroup_protection(struct mem_cgroup *root, |
581 | struct mem_cgroup *memcg, | |
582 | unsigned long *min, | |
583 | unsigned long *low) | |
9783aa99 | 584 | { |
f56ce412 JW |
585 | *min = *low = 0; |
586 | ||
1bc63fb1 | 587 | if (mem_cgroup_disabled()) |
f56ce412 | 588 | return; |
1bc63fb1 | 589 | |
22f7496f YS |
590 | /* |
591 | * There is no reclaim protection applied to a targeted reclaim. | |
592 | * We are special casing this specific case here because | |
5d241789 | 593 | * mem_cgroup_calculate_protection is not robust enough to keep |
22f7496f YS |
594 | * the protection invariant for calculated effective values for |
595 | * parallel reclaimers with different reclaim target. This is | |
596 | * especially a problem for tail memcgs (as they have pages on LRU) | |
597 | * which would want to have effective values 0 for targeted reclaim | |
598 | * but a different value for external reclaim. | |
599 | * | |
600 | * Example | |
601 | * Let's have global and A's reclaim in parallel: | |
602 | * | | |
603 | * A (low=2G, usage = 3G, max = 3G, children_low_usage = 1.5G) | |
604 | * |\ | |
605 | * | C (low = 1G, usage = 2.5G) | |
606 | * B (low = 1G, usage = 0.5G) | |
607 | * | |
608 | * For the global reclaim | |
609 | * A.elow = A.low | |
610 | * B.elow = min(B.usage, B.low) because children_low_usage <= A.elow | |
611 | * C.elow = min(C.usage, C.low) | |
612 | * | |
613 | * With the effective values resetting we have A reclaim | |
614 | * A.elow = 0 | |
615 | * B.elow = B.low | |
616 | * C.elow = C.low | |
617 | * | |
618 | * If the global reclaim races with A's reclaim then | |
619 | * B.elow = C.elow = 0 because children_low_usage > A.elow) | |
620 | * is possible and reclaiming B would be violating the protection. | |
621 | * | |
622 | */ | |
623 | if (root == memcg) | |
f56ce412 | 624 | return; |
9783aa99 | 625 | |
f56ce412 JW |
626 | *min = READ_ONCE(memcg->memory.emin); |
627 | *low = READ_ONCE(memcg->memory.elow); | |
9783aa99 CD |
628 | } |
629 | ||
45c7f7e1 CD |
630 | void mem_cgroup_calculate_protection(struct mem_cgroup *root, |
631 | struct mem_cgroup *memcg); | |
632 | ||
adb82130 YA |
633 | static inline bool mem_cgroup_unprotected(struct mem_cgroup *target, |
634 | struct mem_cgroup *memcg) | |
45c7f7e1 CD |
635 | { |
636 | /* | |
637 | * The root memcg doesn't account charges, and doesn't support | |
adb82130 YA |
638 | * protection. The target memcg's protection is ignored, see |
639 | * mem_cgroup_calculate_protection() and mem_cgroup_protection() | |
45c7f7e1 | 640 | */ |
adb82130 YA |
641 | return mem_cgroup_disabled() || mem_cgroup_is_root(memcg) || |
642 | memcg == target; | |
45c7f7e1 CD |
643 | } |
644 | ||
adb82130 YA |
645 | static inline bool mem_cgroup_below_low(struct mem_cgroup *target, |
646 | struct mem_cgroup *memcg) | |
45c7f7e1 | 647 | { |
adb82130 | 648 | if (mem_cgroup_unprotected(target, memcg)) |
45c7f7e1 CD |
649 | return false; |
650 | ||
651 | return READ_ONCE(memcg->memory.elow) >= | |
652 | page_counter_read(&memcg->memory); | |
653 | } | |
654 | ||
adb82130 YA |
655 | static inline bool mem_cgroup_below_min(struct mem_cgroup *target, |
656 | struct mem_cgroup *memcg) | |
45c7f7e1 | 657 | { |
adb82130 | 658 | if (mem_cgroup_unprotected(target, memcg)) |
45c7f7e1 CD |
659 | return false; |
660 | ||
661 | return READ_ONCE(memcg->memory.emin) >= | |
662 | page_counter_read(&memcg->memory); | |
663 | } | |
241994ed | 664 | |
8f425e4e MWO |
665 | int __mem_cgroup_charge(struct folio *folio, struct mm_struct *mm, gfp_t gfp); |
666 | ||
667 | /** | |
668 | * mem_cgroup_charge - Charge a newly allocated folio to a cgroup. | |
669 | * @folio: Folio to charge. | |
670 | * @mm: mm context of the allocating task. | |
671 | * @gfp: Reclaim mode. | |
672 | * | |
673 | * Try to charge @folio to the memcg that @mm belongs to, reclaiming | |
674 | * pages according to @gfp if necessary. If @mm is NULL, try to | |
675 | * charge to the active memcg. | |
676 | * | |
677 | * Do not use this for folios allocated for swapin. | |
678 | * | |
679 | * Return: 0 on success. Otherwise, an error code is returned. | |
680 | */ | |
681 | static inline int mem_cgroup_charge(struct folio *folio, struct mm_struct *mm, | |
682 | gfp_t gfp) | |
2c8d8f97 SB |
683 | { |
684 | if (mem_cgroup_disabled()) | |
685 | return 0; | |
8f425e4e | 686 | return __mem_cgroup_charge(folio, mm, gfp); |
2c8d8f97 SB |
687 | } |
688 | ||
65995918 | 689 | int mem_cgroup_swapin_charge_folio(struct folio *folio, struct mm_struct *mm, |
0add0c77 SB |
690 | gfp_t gfp, swp_entry_t entry); |
691 | void mem_cgroup_swapin_uncharge_swap(swp_entry_t entry); | |
3fea5a49 | 692 | |
bbc6b703 MWO |
693 | void __mem_cgroup_uncharge(struct folio *folio); |
694 | ||
695 | /** | |
696 | * mem_cgroup_uncharge - Uncharge a folio. | |
697 | * @folio: Folio to uncharge. | |
698 | * | |
699 | * Uncharge a folio previously charged with mem_cgroup_charge(). | |
700 | */ | |
701 | static inline void mem_cgroup_uncharge(struct folio *folio) | |
2c8d8f97 SB |
702 | { |
703 | if (mem_cgroup_disabled()) | |
704 | return; | |
bbc6b703 | 705 | __mem_cgroup_uncharge(folio); |
2c8d8f97 SB |
706 | } |
707 | ||
708 | void __mem_cgroup_uncharge_list(struct list_head *page_list); | |
709 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) | |
710 | { | |
711 | if (mem_cgroup_disabled()) | |
712 | return; | |
713 | __mem_cgroup_uncharge_list(page_list); | |
714 | } | |
569b846d | 715 | |
d21bba2b | 716 | void mem_cgroup_migrate(struct folio *old, struct folio *new); |
569b846d | 717 | |
55779ec7 | 718 | /** |
867e5e1d | 719 | * mem_cgroup_lruvec - get the lru list vector for a memcg & node |
55779ec7 | 720 | * @memcg: memcg of the wanted lruvec |
9a1ac228 | 721 | * @pgdat: pglist_data |
55779ec7 | 722 | * |
867e5e1d | 723 | * Returns the lru list vector holding pages for a given @memcg & |
9a1ac228 | 724 | * @pgdat combination. This can be the node lruvec, if the memory |
867e5e1d | 725 | * controller is disabled. |
55779ec7 | 726 | */ |
867e5e1d JW |
727 | static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg, |
728 | struct pglist_data *pgdat) | |
55779ec7 | 729 | { |
ef8f2327 | 730 | struct mem_cgroup_per_node *mz; |
55779ec7 JW |
731 | struct lruvec *lruvec; |
732 | ||
733 | if (mem_cgroup_disabled()) { | |
867e5e1d | 734 | lruvec = &pgdat->__lruvec; |
55779ec7 JW |
735 | goto out; |
736 | } | |
737 | ||
1b05117d JW |
738 | if (!memcg) |
739 | memcg = root_mem_cgroup; | |
740 | ||
a3747b53 | 741 | mz = memcg->nodeinfo[pgdat->node_id]; |
55779ec7 JW |
742 | lruvec = &mz->lruvec; |
743 | out: | |
744 | /* | |
745 | * Since a node can be onlined after the mem_cgroup was created, | |
599d0c95 | 746 | * we have to be prepared to initialize lruvec->pgdat here; |
55779ec7 JW |
747 | * and if offlined then reonlined, we need to reinitialize it. |
748 | */ | |
ef8f2327 MG |
749 | if (unlikely(lruvec->pgdat != pgdat)) |
750 | lruvec->pgdat = pgdat; | |
55779ec7 JW |
751 | return lruvec; |
752 | } | |
753 | ||
9a1ac228 | 754 | /** |
b1baabd9 MWO |
755 | * folio_lruvec - return lruvec for isolating/putting an LRU folio |
756 | * @folio: Pointer to the folio. | |
9a1ac228 | 757 | * |
b1baabd9 | 758 | * This function relies on folio->mem_cgroup being stable. |
9a1ac228 | 759 | */ |
b1baabd9 | 760 | static inline struct lruvec *folio_lruvec(struct folio *folio) |
9a1ac228 | 761 | { |
b1baabd9 | 762 | struct mem_cgroup *memcg = folio_memcg(folio); |
9a1ac228 | 763 | |
b1baabd9 MWO |
764 | VM_WARN_ON_ONCE_FOLIO(!memcg && !mem_cgroup_disabled(), folio); |
765 | return mem_cgroup_lruvec(memcg, folio_pgdat(folio)); | |
9a1ac228 | 766 | } |
c9b0ed51 | 767 | |
64219994 | 768 | struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
e993d905 | 769 | |
d46eb14b SB |
770 | struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm); |
771 | ||
e809c3fe MWO |
772 | struct lruvec *folio_lruvec_lock(struct folio *folio); |
773 | struct lruvec *folio_lruvec_lock_irq(struct folio *folio); | |
774 | struct lruvec *folio_lruvec_lock_irqsave(struct folio *folio, | |
6168d0da AS |
775 | unsigned long *flags); |
776 | ||
777 | #ifdef CONFIG_DEBUG_VM | |
e809c3fe | 778 | void lruvec_memcg_debug(struct lruvec *lruvec, struct folio *folio); |
6168d0da | 779 | #else |
e809c3fe MWO |
780 | static inline |
781 | void lruvec_memcg_debug(struct lruvec *lruvec, struct folio *folio) | |
6168d0da AS |
782 | { |
783 | } | |
784 | #endif | |
785 | ||
33398cf2 MH |
786 | static inline |
787 | struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){ | |
788 | return css ? container_of(css, struct mem_cgroup, css) : NULL; | |
789 | } | |
790 | ||
bf4f0599 RG |
791 | static inline bool obj_cgroup_tryget(struct obj_cgroup *objcg) |
792 | { | |
793 | return percpu_ref_tryget(&objcg->refcnt); | |
794 | } | |
795 | ||
796 | static inline void obj_cgroup_get(struct obj_cgroup *objcg) | |
797 | { | |
798 | percpu_ref_get(&objcg->refcnt); | |
799 | } | |
800 | ||
b4e0b68f MS |
801 | static inline void obj_cgroup_get_many(struct obj_cgroup *objcg, |
802 | unsigned long nr) | |
bf4f0599 | 803 | { |
b4e0b68f | 804 | percpu_ref_get_many(&objcg->refcnt, nr); |
bf4f0599 RG |
805 | } |
806 | ||
b4e0b68f | 807 | static inline void obj_cgroup_put(struct obj_cgroup *objcg) |
bf4f0599 | 808 | { |
b4e0b68f | 809 | percpu_ref_put(&objcg->refcnt); |
bf4f0599 RG |
810 | } |
811 | ||
e4dde56c YZ |
812 | static inline bool mem_cgroup_tryget(struct mem_cgroup *memcg) |
813 | { | |
814 | return !memcg || css_tryget(&memcg->css); | |
815 | } | |
816 | ||
dc0b5864 RG |
817 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
818 | { | |
d46eb14b SB |
819 | if (memcg) |
820 | css_put(&memcg->css); | |
dc0b5864 RG |
821 | } |
822 | ||
8e8ae645 JW |
823 | #define mem_cgroup_from_counter(counter, member) \ |
824 | container_of(counter, struct mem_cgroup, member) | |
825 | ||
33398cf2 MH |
826 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
827 | struct mem_cgroup *, | |
828 | struct mem_cgroup_reclaim_cookie *); | |
829 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); | |
025b7799 Z |
830 | void mem_cgroup_scan_tasks(struct mem_cgroup *memcg, |
831 | int (*)(struct task_struct *, void *), void *arg); | |
33398cf2 | 832 | |
23047a96 JW |
833 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
834 | { | |
835 | if (mem_cgroup_disabled()) | |
836 | return 0; | |
837 | ||
73f576c0 | 838 | return memcg->id.id; |
23047a96 | 839 | } |
73f576c0 | 840 | struct mem_cgroup *mem_cgroup_from_id(unsigned short id); |
23047a96 | 841 | |
c15187a4 RG |
842 | #ifdef CONFIG_SHRINKER_DEBUG |
843 | static inline unsigned long mem_cgroup_ino(struct mem_cgroup *memcg) | |
844 | { | |
845 | return memcg ? cgroup_ino(memcg->css.cgroup) : 0; | |
846 | } | |
847 | ||
848 | struct mem_cgroup *mem_cgroup_get_from_ino(unsigned long ino); | |
849 | #endif | |
850 | ||
aa9694bb CD |
851 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
852 | { | |
853 | return mem_cgroup_from_css(seq_css(m)); | |
854 | } | |
855 | ||
2262185c RG |
856 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
857 | { | |
858 | struct mem_cgroup_per_node *mz; | |
859 | ||
860 | if (mem_cgroup_disabled()) | |
861 | return NULL; | |
862 | ||
863 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
864 | return mz->memcg; | |
865 | } | |
866 | ||
8e8ae645 JW |
867 | /** |
868 | * parent_mem_cgroup - find the accounting parent of a memcg | |
869 | * @memcg: memcg whose parent to find | |
870 | * | |
ca39c5e7 | 871 | * Returns the parent memcg, or NULL if this is the root. |
8e8ae645 JW |
872 | */ |
873 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) | |
874 | { | |
486bc706 | 875 | return mem_cgroup_from_css(memcg->css.parent); |
8e8ae645 JW |
876 | } |
877 | ||
33398cf2 MH |
878 | static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, |
879 | struct mem_cgroup *root) | |
880 | { | |
881 | if (root == memcg) | |
882 | return true; | |
33398cf2 MH |
883 | return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup); |
884 | } | |
e1aab161 | 885 | |
2314b42d JW |
886 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
887 | struct mem_cgroup *memcg) | |
2e4d4091 | 888 | { |
587af308 | 889 | struct mem_cgroup *task_memcg; |
413918bb | 890 | bool match = false; |
c3ac9a8a | 891 | |
2e4d4091 | 892 | rcu_read_lock(); |
587af308 | 893 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
413918bb | 894 | if (task_memcg) |
2314b42d | 895 | match = mem_cgroup_is_descendant(task_memcg, memcg); |
2e4d4091 | 896 | rcu_read_unlock(); |
c3ac9a8a | 897 | return match; |
2e4d4091 | 898 | } |
8a9f3ccd | 899 | |
75376c6f | 900 | struct cgroup_subsys_state *mem_cgroup_css_from_folio(struct folio *folio); |
2fc04524 | 901 | ino_t page_cgroup_ino(struct page *page); |
d324236b | 902 | |
eb01aaab VD |
903 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
904 | { | |
905 | if (mem_cgroup_disabled()) | |
906 | return true; | |
907 | return !!(memcg->css.flags & CSS_ONLINE); | |
908 | } | |
909 | ||
33398cf2 | 910 | void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, |
b4536f0c | 911 | int zid, int nr_pages); |
33398cf2 | 912 | |
b4536f0c MH |
913 | static inline |
914 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
915 | enum lru_list lru, int zone_idx) | |
916 | { | |
917 | struct mem_cgroup_per_node *mz; | |
918 | ||
919 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
e0e3f42f | 920 | return READ_ONCE(mz->lru_zone_size[zone_idx][lru]); |
33398cf2 MH |
921 | } |
922 | ||
9ea9cb00 | 923 | void mem_cgroup_handle_over_high(gfp_t gfp_mask); |
b23afb93 | 924 | |
bbec2e15 | 925 | unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg); |
7c5f64f8 | 926 | |
9783aa99 CD |
927 | unsigned long mem_cgroup_size(struct mem_cgroup *memcg); |
928 | ||
f0c867d9 | 929 | void mem_cgroup_print_oom_context(struct mem_cgroup *memcg, |
64219994 | 930 | struct task_struct *p); |
58ae83db | 931 | |
f0c867d9 | 932 | void mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg); |
933 | ||
29ef680a | 934 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 | 935 | { |
29ef680a MH |
936 | WARN_ON(current->in_user_fault); |
937 | current->in_user_fault = 1; | |
519e5247 JW |
938 | } |
939 | ||
29ef680a | 940 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 | 941 | { |
29ef680a MH |
942 | WARN_ON(!current->in_user_fault); |
943 | current->in_user_fault = 0; | |
519e5247 JW |
944 | } |
945 | ||
3812c8c8 JW |
946 | static inline bool task_in_memcg_oom(struct task_struct *p) |
947 | { | |
626ebc41 | 948 | return p->memcg_in_oom; |
3812c8c8 JW |
949 | } |
950 | ||
49426420 | 951 | bool mem_cgroup_oom_synchronize(bool wait); |
3d8b38eb RG |
952 | struct mem_cgroup *mem_cgroup_get_oom_group(struct task_struct *victim, |
953 | struct mem_cgroup *oom_domain); | |
954 | void mem_cgroup_print_oom_group(struct mem_cgroup *memcg); | |
3812c8c8 | 955 | |
f70ad448 MWO |
956 | void folio_memcg_lock(struct folio *folio); |
957 | void folio_memcg_unlock(struct folio *folio); | |
d7365e78 | 958 | |
db9adbcb | 959 | void __mod_memcg_state(struct mem_cgroup *memcg, int idx, int val); |
2a2e4885 | 960 | |
018ee47f YZ |
961 | /* try to stablize folio_memcg() for all the pages in a memcg */ |
962 | static inline bool mem_cgroup_trylock_pages(struct mem_cgroup *memcg) | |
963 | { | |
964 | rcu_read_lock(); | |
965 | ||
966 | if (mem_cgroup_disabled() || !atomic_read(&memcg->moving_account)) | |
967 | return true; | |
968 | ||
969 | rcu_read_unlock(); | |
970 | return false; | |
971 | } | |
972 | ||
973 | static inline void mem_cgroup_unlock_pages(void) | |
974 | { | |
975 | rcu_read_unlock(); | |
976 | } | |
977 | ||
04fecbf5 | 978 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 979 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 980 | int idx, int val) |
2a2e4885 | 981 | { |
c3cc3911 JW |
982 | unsigned long flags; |
983 | ||
984 | local_irq_save(flags); | |
a983b5eb | 985 | __mod_memcg_state(memcg, idx, val); |
c3cc3911 | 986 | local_irq_restore(flags); |
2a2e4885 JW |
987 | } |
988 | ||
4e5aa1f4 SB |
989 | static inline void mod_memcg_page_state(struct page *page, |
990 | int idx, int val) | |
991 | { | |
992 | struct mem_cgroup *memcg; | |
993 | ||
994 | if (mem_cgroup_disabled()) | |
995 | return; | |
996 | ||
997 | rcu_read_lock(); | |
998 | memcg = page_memcg(page); | |
999 | if (memcg) | |
1000 | mod_memcg_state(memcg, idx, val); | |
1001 | rcu_read_unlock(); | |
1002 | } | |
1003 | ||
410f8e82 | 1004 | unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx); |
7490a2d2 | 1005 | |
42a30035 JW |
1006 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
1007 | enum node_stat_item idx) | |
1008 | { | |
1009 | struct mem_cgroup_per_node *pn; | |
dbb16df6 | 1010 | long x; |
42a30035 JW |
1011 | |
1012 | if (mem_cgroup_disabled()) | |
1013 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
1014 | ||
1015 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
dbb16df6 SB |
1016 | x = READ_ONCE(pn->lruvec_stats.state[idx]); |
1017 | #ifdef CONFIG_SMP | |
1018 | if (x < 0) | |
1019 | x = 0; | |
1020 | #endif | |
1021 | return x; | |
42a30035 JW |
1022 | } |
1023 | ||
205b20cc JW |
1024 | static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
1025 | enum node_stat_item idx) | |
2a7106f2 | 1026 | { |
00f3ca2c | 1027 | struct mem_cgroup_per_node *pn; |
815744d7 | 1028 | long x = 0; |
00f3ca2c JW |
1029 | |
1030 | if (mem_cgroup_disabled()) | |
1031 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
1032 | ||
1033 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
f82e6bf9 | 1034 | x = READ_ONCE(pn->lruvec_stats.state_local[idx]); |
a983b5eb JW |
1035 | #ifdef CONFIG_SMP |
1036 | if (x < 0) | |
1037 | x = 0; | |
1038 | #endif | |
1039 | return x; | |
2a7106f2 GT |
1040 | } |
1041 | ||
aa48e47e | 1042 | void mem_cgroup_flush_stats(void); |
4009b2f1 | 1043 | void mem_cgroup_flush_stats_ratelimited(void); |
aa48e47e | 1044 | |
eedc4e5a RG |
1045 | void __mod_memcg_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx, |
1046 | int val); | |
da3ceeff | 1047 | void __mod_lruvec_kmem_state(void *p, enum node_stat_item idx, int val); |
991e7673 | 1048 | |
da3ceeff | 1049 | static inline void mod_lruvec_kmem_state(void *p, enum node_stat_item idx, |
991e7673 SB |
1050 | int val) |
1051 | { | |
1052 | unsigned long flags; | |
1053 | ||
1054 | local_irq_save(flags); | |
da3ceeff | 1055 | __mod_lruvec_kmem_state(p, idx, val); |
991e7673 SB |
1056 | local_irq_restore(flags); |
1057 | } | |
1058 | ||
eedc4e5a RG |
1059 | static inline void mod_memcg_lruvec_state(struct lruvec *lruvec, |
1060 | enum node_stat_item idx, int val) | |
1061 | { | |
1062 | unsigned long flags; | |
1063 | ||
1064 | local_irq_save(flags); | |
1065 | __mod_memcg_lruvec_state(lruvec, idx, val); | |
1066 | local_irq_restore(flags); | |
1067 | } | |
1068 | ||
db9adbcb JW |
1069 | void __count_memcg_events(struct mem_cgroup *memcg, enum vm_event_item idx, |
1070 | unsigned long count); | |
c9019e9b | 1071 | |
2262185c | 1072 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
e27be240 JW |
1073 | enum vm_event_item idx, |
1074 | unsigned long count) | |
2262185c | 1075 | { |
c3cc3911 JW |
1076 | unsigned long flags; |
1077 | ||
1078 | local_irq_save(flags); | |
a983b5eb | 1079 | __count_memcg_events(memcg, idx, count); |
c3cc3911 | 1080 | local_irq_restore(flags); |
2262185c RG |
1081 | } |
1082 | ||
1083 | static inline void count_memcg_page_event(struct page *page, | |
e27be240 | 1084 | enum vm_event_item idx) |
2262185c | 1085 | { |
bcfe06bf RG |
1086 | struct mem_cgroup *memcg = page_memcg(page); |
1087 | ||
1088 | if (memcg) | |
1089 | count_memcg_events(memcg, idx, 1); | |
2262185c RG |
1090 | } |
1091 | ||
64daa5d8 MWO |
1092 | static inline void count_memcg_folio_events(struct folio *folio, |
1093 | enum vm_event_item idx, unsigned long nr) | |
1094 | { | |
1095 | struct mem_cgroup *memcg = folio_memcg(folio); | |
1096 | ||
1097 | if (memcg) | |
1098 | count_memcg_events(memcg, idx, nr); | |
1099 | } | |
1100 | ||
2262185c RG |
1101 | static inline void count_memcg_event_mm(struct mm_struct *mm, |
1102 | enum vm_event_item idx) | |
68ae564b | 1103 | { |
33398cf2 MH |
1104 | struct mem_cgroup *memcg; |
1105 | ||
68ae564b DR |
1106 | if (mem_cgroup_disabled()) |
1107 | return; | |
33398cf2 MH |
1108 | |
1109 | rcu_read_lock(); | |
1110 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
fe6bdfc8 | 1111 | if (likely(memcg)) |
c9019e9b | 1112 | count_memcg_events(memcg, idx, 1); |
33398cf2 | 1113 | rcu_read_unlock(); |
68ae564b | 1114 | } |
c9019e9b | 1115 | |
e27be240 JW |
1116 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
1117 | enum memcg_memory_event event) | |
c9019e9b | 1118 | { |
8b21ca02 MS |
1119 | bool swap_event = event == MEMCG_SWAP_HIGH || event == MEMCG_SWAP_MAX || |
1120 | event == MEMCG_SWAP_FAIL; | |
1121 | ||
1e577f97 | 1122 | atomic_long_inc(&memcg->memory_events_local[event]); |
8b21ca02 MS |
1123 | if (!swap_event) |
1124 | cgroup_file_notify(&memcg->events_local_file); | |
1e577f97 | 1125 | |
9852ae3f CD |
1126 | do { |
1127 | atomic_long_inc(&memcg->memory_events[event]); | |
8b21ca02 MS |
1128 | if (swap_event) |
1129 | cgroup_file_notify(&memcg->swap_events_file); | |
1130 | else | |
1131 | cgroup_file_notify(&memcg->events_file); | |
9852ae3f | 1132 | |
04fd61a4 YS |
1133 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys)) |
1134 | break; | |
9852ae3f CD |
1135 | if (cgrp_dfl_root.flags & CGRP_ROOT_MEMORY_LOCAL_EVENTS) |
1136 | break; | |
1137 | } while ((memcg = parent_mem_cgroup(memcg)) && | |
1138 | !mem_cgroup_is_root(memcg)); | |
c9019e9b JW |
1139 | } |
1140 | ||
fe6bdfc8 RG |
1141 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
1142 | enum memcg_memory_event event) | |
1143 | { | |
1144 | struct mem_cgroup *memcg; | |
1145 | ||
1146 | if (mem_cgroup_disabled()) | |
1147 | return; | |
1148 | ||
1149 | rcu_read_lock(); | |
1150 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
1151 | if (likely(memcg)) | |
1152 | memcg_memory_event(memcg, event); | |
1153 | rcu_read_unlock(); | |
1154 | } | |
1155 | ||
be6c8982 | 1156 | void split_page_memcg(struct page *head, unsigned int nr); |
ca3e0214 | 1157 | |
2d146aa3 JW |
1158 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
1159 | gfp_t gfp_mask, | |
1160 | unsigned long *total_scanned); | |
1161 | ||
c255a458 | 1162 | #else /* CONFIG_MEMCG */ |
23047a96 JW |
1163 | |
1164 | #define MEM_CGROUP_ID_SHIFT 0 | |
23047a96 | 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 | ||
025b7799 | 1370 | static inline void mem_cgroup_scan_tasks(struct mem_cgroup *memcg, |
7c5f64f8 VD |
1371 | int (*fn)(struct task_struct *, void *), void *arg) |
1372 | { | |
7c5f64f8 VD |
1373 | } |
1374 | ||
23047a96 | 1375 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
f8d66542 | 1376 | { |
23047a96 JW |
1377 | return 0; |
1378 | } | |
1379 | ||
1380 | static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id) | |
1381 | { | |
1382 | WARN_ON_ONCE(id); | |
1383 | /* XXX: This should always return root_mem_cgroup */ | |
1384 | return NULL; | |
f8d66542 | 1385 | } |
a636b327 | 1386 | |
c15187a4 RG |
1387 | #ifdef CONFIG_SHRINKER_DEBUG |
1388 | static inline unsigned long mem_cgroup_ino(struct mem_cgroup *memcg) | |
1389 | { | |
1390 | return 0; | |
1391 | } | |
1392 | ||
1393 | static inline struct mem_cgroup *mem_cgroup_get_from_ino(unsigned long ino) | |
1394 | { | |
1395 | return NULL; | |
1396 | } | |
1397 | #endif | |
1398 | ||
aa9694bb CD |
1399 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
1400 | { | |
1401 | return NULL; | |
1402 | } | |
1403 | ||
2262185c RG |
1404 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
1405 | { | |
1406 | return NULL; | |
1407 | } | |
1408 | ||
eb01aaab | 1409 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
14797e23 | 1410 | { |
13308ca9 | 1411 | return true; |
14797e23 KM |
1412 | } |
1413 | ||
b4536f0c MH |
1414 | static inline |
1415 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
1416 | enum lru_list lru, int zone_idx) | |
1417 | { | |
1418 | return 0; | |
1419 | } | |
a3d8e054 | 1420 | |
bbec2e15 | 1421 | static inline unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg) |
7c5f64f8 VD |
1422 | { |
1423 | return 0; | |
1424 | } | |
1425 | ||
9783aa99 CD |
1426 | static inline unsigned long mem_cgroup_size(struct mem_cgroup *memcg) |
1427 | { | |
1428 | return 0; | |
1429 | } | |
1430 | ||
e222432b | 1431 | static inline void |
f0c867d9 | 1432 | mem_cgroup_print_oom_context(struct mem_cgroup *memcg, struct task_struct *p) |
1433 | { | |
1434 | } | |
1435 | ||
1436 | static inline void | |
1437 | mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg) | |
e222432b BS |
1438 | { |
1439 | } | |
1440 | ||
f70ad448 MWO |
1441 | static inline void folio_memcg_lock(struct folio *folio) |
1442 | { | |
1443 | } | |
1444 | ||
1445 | static inline void folio_memcg_unlock(struct folio *folio) | |
1446 | { | |
1447 | } | |
1448 | ||
018ee47f YZ |
1449 | static inline bool mem_cgroup_trylock_pages(struct mem_cgroup *memcg) |
1450 | { | |
1451 | /* to match folio_memcg_rcu() */ | |
1452 | rcu_read_lock(); | |
1453 | return true; | |
1454 | } | |
1455 | ||
1456 | static inline void mem_cgroup_unlock_pages(void) | |
1457 | { | |
1458 | rcu_read_unlock(); | |
1459 | } | |
1460 | ||
9ea9cb00 | 1461 | static inline void mem_cgroup_handle_over_high(gfp_t gfp_mask) |
b23afb93 TH |
1462 | { |
1463 | } | |
1464 | ||
29ef680a | 1465 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 JW |
1466 | { |
1467 | } | |
1468 | ||
29ef680a | 1469 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 JW |
1470 | { |
1471 | } | |
1472 | ||
3812c8c8 JW |
1473 | static inline bool task_in_memcg_oom(struct task_struct *p) |
1474 | { | |
1475 | return false; | |
1476 | } | |
1477 | ||
49426420 | 1478 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
3812c8c8 JW |
1479 | { |
1480 | return false; | |
1481 | } | |
1482 | ||
3d8b38eb RG |
1483 | static inline struct mem_cgroup *mem_cgroup_get_oom_group( |
1484 | struct task_struct *victim, struct mem_cgroup *oom_domain) | |
1485 | { | |
1486 | return NULL; | |
1487 | } | |
1488 | ||
1489 | static inline void mem_cgroup_print_oom_group(struct mem_cgroup *memcg) | |
1490 | { | |
1491 | } | |
1492 | ||
00f3ca2c | 1493 | static inline void __mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1494 | int idx, |
00f3ca2c | 1495 | int nr) |
2a2e4885 JW |
1496 | { |
1497 | } | |
1498 | ||
00f3ca2c | 1499 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1500 | int idx, |
00f3ca2c | 1501 | int nr) |
2a2e4885 JW |
1502 | { |
1503 | } | |
1504 | ||
4e5aa1f4 SB |
1505 | static inline void mod_memcg_page_state(struct page *page, |
1506 | int idx, int val) | |
1507 | { | |
1508 | } | |
1509 | ||
7490a2d2 SB |
1510 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx) |
1511 | { | |
1512 | return 0; | |
1513 | } | |
1514 | ||
42a30035 JW |
1515 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
1516 | enum node_stat_item idx) | |
1517 | { | |
1518 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
1519 | } | |
1520 | ||
205b20cc JW |
1521 | static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
1522 | enum node_stat_item idx) | |
2a7106f2 | 1523 | { |
00f3ca2c | 1524 | return node_page_state(lruvec_pgdat(lruvec), idx); |
2a7106f2 GT |
1525 | } |
1526 | ||
aa48e47e SB |
1527 | static inline void mem_cgroup_flush_stats(void) |
1528 | { | |
1529 | } | |
1530 | ||
4009b2f1 | 1531 | static inline void mem_cgroup_flush_stats_ratelimited(void) |
9b301615 SB |
1532 | { |
1533 | } | |
1534 | ||
eedc4e5a RG |
1535 | static inline void __mod_memcg_lruvec_state(struct lruvec *lruvec, |
1536 | enum node_stat_item idx, int val) | |
1537 | { | |
1538 | } | |
1539 | ||
da3ceeff | 1540 | static inline void __mod_lruvec_kmem_state(void *p, enum node_stat_item idx, |
ec9f0238 RG |
1541 | int val) |
1542 | { | |
1543 | struct page *page = virt_to_head_page(p); | |
1544 | ||
1545 | __mod_node_page_state(page_pgdat(page), idx, val); | |
1546 | } | |
1547 | ||
da3ceeff | 1548 | static inline void mod_lruvec_kmem_state(void *p, enum node_stat_item idx, |
991e7673 SB |
1549 | int val) |
1550 | { | |
1551 | struct page *page = virt_to_head_page(p); | |
1552 | ||
1553 | mod_node_page_state(page_pgdat(page), idx, val); | |
1554 | } | |
1555 | ||
2262185c RG |
1556 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
1557 | enum vm_event_item idx, | |
1558 | unsigned long count) | |
1559 | { | |
1560 | } | |
1561 | ||
9851ac13 KT |
1562 | static inline void __count_memcg_events(struct mem_cgroup *memcg, |
1563 | enum vm_event_item idx, | |
1564 | unsigned long count) | |
1565 | { | |
1566 | } | |
1567 | ||
2262185c | 1568 | static inline void count_memcg_page_event(struct page *page, |
04fecbf5 | 1569 | int idx) |
2262185c RG |
1570 | { |
1571 | } | |
1572 | ||
64daa5d8 MWO |
1573 | static inline void count_memcg_folio_events(struct folio *folio, |
1574 | enum vm_event_item idx, unsigned long nr) | |
1575 | { | |
1576 | } | |
1577 | ||
456f998e | 1578 | static inline |
2262185c | 1579 | void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx) |
456f998e YH |
1580 | { |
1581 | } | |
6168d0da | 1582 | |
2d146aa3 JW |
1583 | static inline void split_page_memcg(struct page *head, unsigned int nr) |
1584 | { | |
1585 | } | |
1586 | ||
1587 | static inline | |
1588 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, | |
1589 | gfp_t gfp_mask, | |
1590 | unsigned long *total_scanned) | |
6168d0da | 1591 | { |
2d146aa3 | 1592 | return 0; |
6168d0da | 1593 | } |
c255a458 | 1594 | #endif /* CONFIG_MEMCG */ |
78fb7466 | 1595 | |
da3ceeff | 1596 | static inline void __inc_lruvec_kmem_state(void *p, enum node_stat_item idx) |
ec9f0238 | 1597 | { |
da3ceeff | 1598 | __mod_lruvec_kmem_state(p, idx, 1); |
ec9f0238 RG |
1599 | } |
1600 | ||
da3ceeff | 1601 | static inline void __dec_lruvec_kmem_state(void *p, enum node_stat_item idx) |
ec9f0238 | 1602 | { |
da3ceeff | 1603 | __mod_lruvec_kmem_state(p, idx, -1); |
ec9f0238 RG |
1604 | } |
1605 | ||
7cf111bc JW |
1606 | static inline struct lruvec *parent_lruvec(struct lruvec *lruvec) |
1607 | { | |
1608 | struct mem_cgroup *memcg; | |
1609 | ||
1610 | memcg = lruvec_memcg(lruvec); | |
1611 | if (!memcg) | |
1612 | return NULL; | |
1613 | memcg = parent_mem_cgroup(memcg); | |
1614 | if (!memcg) | |
1615 | return NULL; | |
1616 | return mem_cgroup_lruvec(memcg, lruvec_pgdat(lruvec)); | |
1617 | } | |
1618 | ||
6168d0da AS |
1619 | static inline void unlock_page_lruvec(struct lruvec *lruvec) |
1620 | { | |
1621 | spin_unlock(&lruvec->lru_lock); | |
1622 | } | |
1623 | ||
1624 | static inline void unlock_page_lruvec_irq(struct lruvec *lruvec) | |
1625 | { | |
1626 | spin_unlock_irq(&lruvec->lru_lock); | |
1627 | } | |
1628 | ||
1629 | static inline void unlock_page_lruvec_irqrestore(struct lruvec *lruvec, | |
1630 | unsigned long flags) | |
1631 | { | |
1632 | spin_unlock_irqrestore(&lruvec->lru_lock, flags); | |
1633 | } | |
1634 | ||
7467c391 | 1635 | /* Test requires a stable page->memcg binding, see page_memcg() */ |
0de340cb MWO |
1636 | static inline bool folio_matches_lruvec(struct folio *folio, |
1637 | struct lruvec *lruvec) | |
f2e4d28d | 1638 | { |
0de340cb MWO |
1639 | return lruvec_pgdat(lruvec) == folio_pgdat(folio) && |
1640 | lruvec_memcg(lruvec) == folio_memcg(folio); | |
f2e4d28d MS |
1641 | } |
1642 | ||
2a5e4e34 | 1643 | /* Don't lock again iff page's lruvec locked */ |
0de340cb | 1644 | static inline struct lruvec *folio_lruvec_relock_irq(struct folio *folio, |
2a5e4e34 AD |
1645 | struct lruvec *locked_lruvec) |
1646 | { | |
1647 | if (locked_lruvec) { | |
0de340cb | 1648 | if (folio_matches_lruvec(folio, locked_lruvec)) |
2a5e4e34 AD |
1649 | return locked_lruvec; |
1650 | ||
1651 | unlock_page_lruvec_irq(locked_lruvec); | |
1652 | } | |
1653 | ||
e809c3fe | 1654 | return folio_lruvec_lock_irq(folio); |
2a5e4e34 AD |
1655 | } |
1656 | ||
1657 | /* Don't lock again iff page's lruvec locked */ | |
0de340cb | 1658 | static inline struct lruvec *folio_lruvec_relock_irqsave(struct folio *folio, |
2a5e4e34 AD |
1659 | struct lruvec *locked_lruvec, unsigned long *flags) |
1660 | { | |
1661 | if (locked_lruvec) { | |
0de340cb | 1662 | if (folio_matches_lruvec(folio, locked_lruvec)) |
2a5e4e34 AD |
1663 | return locked_lruvec; |
1664 | ||
1665 | unlock_page_lruvec_irqrestore(locked_lruvec, *flags); | |
1666 | } | |
1667 | ||
e809c3fe | 1668 | return folio_lruvec_lock_irqsave(folio, flags); |
2a5e4e34 AD |
1669 | } |
1670 | ||
52ebea74 | 1671 | #ifdef CONFIG_CGROUP_WRITEBACK |
841710aa | 1672 | |
841710aa | 1673 | struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb); |
c5edf9cd TH |
1674 | void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages, |
1675 | unsigned long *pheadroom, unsigned long *pdirty, | |
1676 | unsigned long *pwriteback); | |
841710aa | 1677 | |
9d8053fc | 1678 | void mem_cgroup_track_foreign_dirty_slowpath(struct folio *folio, |
97b27821 TH |
1679 | struct bdi_writeback *wb); |
1680 | ||
203a3151 | 1681 | static inline void mem_cgroup_track_foreign_dirty(struct folio *folio, |
97b27821 TH |
1682 | struct bdi_writeback *wb) |
1683 | { | |
ac86f547 KW |
1684 | struct mem_cgroup *memcg; |
1685 | ||
08d1d0e6 BH |
1686 | if (mem_cgroup_disabled()) |
1687 | return; | |
1688 | ||
ac86f547 KW |
1689 | memcg = folio_memcg(folio); |
1690 | if (unlikely(memcg && &memcg->css != wb->memcg_css)) | |
9d8053fc | 1691 | mem_cgroup_track_foreign_dirty_slowpath(folio, wb); |
97b27821 TH |
1692 | } |
1693 | ||
1694 | void mem_cgroup_flush_foreign(struct bdi_writeback *wb); | |
1695 | ||
841710aa TH |
1696 | #else /* CONFIG_CGROUP_WRITEBACK */ |
1697 | ||
1698 | static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb) | |
1699 | { | |
1700 | return NULL; | |
1701 | } | |
1702 | ||
c2aa723a | 1703 | static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb, |
c5edf9cd TH |
1704 | unsigned long *pfilepages, |
1705 | unsigned long *pheadroom, | |
c2aa723a TH |
1706 | unsigned long *pdirty, |
1707 | unsigned long *pwriteback) | |
1708 | { | |
1709 | } | |
1710 | ||
203a3151 | 1711 | static inline void mem_cgroup_track_foreign_dirty(struct folio *folio, |
97b27821 TH |
1712 | struct bdi_writeback *wb) |
1713 | { | |
1714 | } | |
1715 | ||
1716 | static inline void mem_cgroup_flush_foreign(struct bdi_writeback *wb) | |
1717 | { | |
1718 | } | |
1719 | ||
841710aa | 1720 | #endif /* CONFIG_CGROUP_WRITEBACK */ |
52ebea74 | 1721 | |
e1aab161 | 1722 | struct sock; |
4b1327be WW |
1723 | bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages, |
1724 | gfp_t gfp_mask); | |
baac50bb | 1725 | void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); |
d886f4e4 | 1726 | #ifdef CONFIG_MEMCG |
ef12947c JW |
1727 | extern struct static_key_false memcg_sockets_enabled_key; |
1728 | #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key) | |
2d758073 JW |
1729 | void mem_cgroup_sk_alloc(struct sock *sk); |
1730 | void mem_cgroup_sk_free(struct sock *sk); | |
baac50bb | 1731 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c | 1732 | { |
ac8a5296 AW |
1733 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys)) |
1734 | return !!memcg->tcpmem_pressure; | |
8e8ae645 | 1735 | do { |
7e6ec49c | 1736 | if (time_before(jiffies, READ_ONCE(memcg->socket_pressure))) |
8e8ae645 JW |
1737 | return true; |
1738 | } while ((memcg = parent_mem_cgroup(memcg))); | |
1739 | return false; | |
e805605c | 1740 | } |
0a432dcb | 1741 | |
e4262c4f YS |
1742 | int alloc_shrinker_info(struct mem_cgroup *memcg); |
1743 | void free_shrinker_info(struct mem_cgroup *memcg); | |
2bfd3637 | 1744 | void set_shrinker_bit(struct mem_cgroup *memcg, int nid, int shrinker_id); |
a178015c | 1745 | void reparent_shrinker_deferred(struct mem_cgroup *memcg); |
e805605c | 1746 | #else |
80e95fe0 | 1747 | #define mem_cgroup_sockets_enabled 0 |
2d758073 JW |
1748 | static inline void mem_cgroup_sk_alloc(struct sock *sk) { }; |
1749 | static inline void mem_cgroup_sk_free(struct sock *sk) { }; | |
baac50bb | 1750 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c JW |
1751 | { |
1752 | return false; | |
1753 | } | |
0a432dcb | 1754 | |
2bfd3637 YS |
1755 | static inline void set_shrinker_bit(struct mem_cgroup *memcg, |
1756 | int nid, int shrinker_id) | |
0a432dcb YS |
1757 | { |
1758 | } | |
e805605c | 1759 | #endif |
7ae1e1d0 | 1760 | |
9b6f7e16 | 1761 | #ifdef CONFIG_MEMCG_KMEM |
4d5c8aed | 1762 | bool mem_cgroup_kmem_disabled(void); |
f4b00eab RG |
1763 | int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, int order); |
1764 | void __memcg_kmem_uncharge_page(struct page *page, int order); | |
45264778 | 1765 | |
bf4f0599 | 1766 | struct obj_cgroup *get_obj_cgroup_from_current(void); |
074e3e26 | 1767 | struct obj_cgroup *get_obj_cgroup_from_folio(struct folio *folio); |
bf4f0599 RG |
1768 | |
1769 | int obj_cgroup_charge(struct obj_cgroup *objcg, gfp_t gfp, size_t size); | |
1770 | void obj_cgroup_uncharge(struct obj_cgroup *objcg, size_t size); | |
1771 | ||
b6c1a8af YS |
1772 | extern struct static_key_false memcg_bpf_enabled_key; |
1773 | static inline bool memcg_bpf_enabled(void) | |
1774 | { | |
1775 | return static_branch_likely(&memcg_bpf_enabled_key); | |
1776 | } | |
1777 | ||
f7a449f7 | 1778 | extern struct static_key_false memcg_kmem_online_key; |
749c5415 | 1779 | |
f7a449f7 | 1780 | static inline bool memcg_kmem_online(void) |
7ae1e1d0 | 1781 | { |
f7a449f7 | 1782 | return static_branch_likely(&memcg_kmem_online_key); |
7ae1e1d0 GC |
1783 | } |
1784 | ||
f4b00eab RG |
1785 | static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1786 | int order) | |
60cd4bcd | 1787 | { |
f7a449f7 | 1788 | if (memcg_kmem_online()) |
f4b00eab | 1789 | return __memcg_kmem_charge_page(page, gfp, order); |
60cd4bcd SB |
1790 | return 0; |
1791 | } | |
1792 | ||
f4b00eab | 1793 | static inline void memcg_kmem_uncharge_page(struct page *page, int order) |
60cd4bcd | 1794 | { |
f7a449f7 | 1795 | if (memcg_kmem_online()) |
f4b00eab | 1796 | __memcg_kmem_uncharge_page(page, order); |
60cd4bcd SB |
1797 | } |
1798 | ||
33398cf2 | 1799 | /* |
a7cb874b RG |
1800 | * A helper for accessing memcg's kmem_id, used for getting |
1801 | * corresponding LRU lists. | |
33398cf2 | 1802 | */ |
7c52f65d | 1803 | static inline int memcg_kmem_id(struct mem_cgroup *memcg) |
33398cf2 MH |
1804 | { |
1805 | return memcg ? memcg->kmemcg_id : -1; | |
1806 | } | |
5722d094 | 1807 | |
8380ce47 | 1808 | struct mem_cgroup *mem_cgroup_from_obj(void *p); |
fc4db90f | 1809 | struct mem_cgroup *mem_cgroup_from_slab_obj(void *p); |
8380ce47 | 1810 | |
f4840ccf JW |
1811 | static inline void count_objcg_event(struct obj_cgroup *objcg, |
1812 | enum vm_event_item idx) | |
1813 | { | |
1814 | struct mem_cgroup *memcg; | |
1815 | ||
f7a449f7 | 1816 | if (!memcg_kmem_online()) |
f4840ccf JW |
1817 | return; |
1818 | ||
1819 | rcu_read_lock(); | |
1820 | memcg = obj_cgroup_memcg(objcg); | |
1821 | count_memcg_events(memcg, idx, 1); | |
1822 | rcu_read_unlock(); | |
1823 | } | |
1824 | ||
7ae1e1d0 | 1825 | #else |
4d5c8aed RG |
1826 | static inline bool mem_cgroup_kmem_disabled(void) |
1827 | { | |
1828 | return true; | |
1829 | } | |
9b6f7e16 | 1830 | |
f4b00eab RG |
1831 | static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1832 | int order) | |
9b6f7e16 RG |
1833 | { |
1834 | return 0; | |
1835 | } | |
1836 | ||
f4b00eab | 1837 | static inline void memcg_kmem_uncharge_page(struct page *page, int order) |
9b6f7e16 RG |
1838 | { |
1839 | } | |
1840 | ||
f4b00eab RG |
1841 | static inline int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1842 | int order) | |
60cd4bcd SB |
1843 | { |
1844 | return 0; | |
1845 | } | |
1846 | ||
f4b00eab | 1847 | static inline void __memcg_kmem_uncharge_page(struct page *page, int order) |
60cd4bcd SB |
1848 | { |
1849 | } | |
1850 | ||
074e3e26 | 1851 | static inline struct obj_cgroup *get_obj_cgroup_from_folio(struct folio *folio) |
f4840ccf JW |
1852 | { |
1853 | return NULL; | |
1854 | } | |
1855 | ||
b6c1a8af YS |
1856 | static inline bool memcg_bpf_enabled(void) |
1857 | { | |
1858 | return false; | |
1859 | } | |
1860 | ||
f7a449f7 | 1861 | static inline bool memcg_kmem_online(void) |
b9ce5ef4 GC |
1862 | { |
1863 | return false; | |
1864 | } | |
1865 | ||
7c52f65d | 1866 | static inline int memcg_kmem_id(struct mem_cgroup *memcg) |
2633d7a0 GC |
1867 | { |
1868 | return -1; | |
1869 | } | |
1870 | ||
8380ce47 RG |
1871 | static inline struct mem_cgroup *mem_cgroup_from_obj(void *p) |
1872 | { | |
1d0403d2 | 1873 | return NULL; |
8380ce47 RG |
1874 | } |
1875 | ||
fc4db90f RG |
1876 | static inline struct mem_cgroup *mem_cgroup_from_slab_obj(void *p) |
1877 | { | |
1878 | return NULL; | |
1879 | } | |
1880 | ||
f4840ccf JW |
1881 | static inline void count_objcg_event(struct obj_cgroup *objcg, |
1882 | enum vm_event_item idx) | |
1883 | { | |
1884 | } | |
1885 | ||
84c07d11 | 1886 | #endif /* CONFIG_MEMCG_KMEM */ |
127424c8 | 1887 | |
f4840ccf JW |
1888 | #if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_ZSWAP) |
1889 | bool obj_cgroup_may_zswap(struct obj_cgroup *objcg); | |
1890 | void obj_cgroup_charge_zswap(struct obj_cgroup *objcg, size_t size); | |
1891 | void obj_cgroup_uncharge_zswap(struct obj_cgroup *objcg, size_t size); | |
1892 | #else | |
1893 | static inline bool obj_cgroup_may_zswap(struct obj_cgroup *objcg) | |
1894 | { | |
1895 | return true; | |
1896 | } | |
1897 | static inline void obj_cgroup_charge_zswap(struct obj_cgroup *objcg, | |
1898 | size_t size) | |
1899 | { | |
1900 | } | |
1901 | static inline void obj_cgroup_uncharge_zswap(struct obj_cgroup *objcg, | |
1902 | size_t size) | |
1903 | { | |
1904 | } | |
1905 | #endif | |
1906 | ||
8cdea7c0 | 1907 | #endif /* _LINUX_MEMCONTROL_H */ |