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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> |
09dacb78 | 17 | #include <linux/kernel.h> |
33398cf2 MH |
18 | #include <linux/page_counter.h> |
19 | #include <linux/vmpressure.h> | |
20 | #include <linux/eventfd.h> | |
00f3ca2c JW |
21 | #include <linux/mm.h> |
22 | #include <linux/vmstat.h> | |
33398cf2 | 23 | #include <linux/writeback.h> |
fdf1cdb9 | 24 | #include <linux/page-flags.h> |
307becec | 25 | #include <linux/shrinker.h> |
456f998e | 26 | |
78fb7466 | 27 | struct mem_cgroup; |
bf4f0599 | 28 | struct obj_cgroup; |
8697d331 BS |
29 | struct page; |
30 | struct mm_struct; | |
2633d7a0 | 31 | struct kmem_cache; |
78fb7466 | 32 | |
71cd3113 JW |
33 | /* Cgroup-specific page state, on top of universal node page state */ |
34 | enum memcg_stat_item { | |
468c3982 | 35 | MEMCG_SWAP = NR_VM_NODE_STAT_ITEMS, |
71cd3113 | 36 | MEMCG_SOCK, |
772616b0 | 37 | MEMCG_PERCPU_B, |
4e5aa1f4 | 38 | MEMCG_VMALLOC, |
a8c49af3 | 39 | MEMCG_KMEM, |
f4840ccf JW |
40 | MEMCG_ZSWAP_B, |
41 | MEMCG_ZSWAPPED, | |
b2807f07 | 42 | MEMCG_NR_STAT, |
2a7106f2 GT |
43 | }; |
44 | ||
e27be240 JW |
45 | enum memcg_memory_event { |
46 | MEMCG_LOW, | |
71cd3113 JW |
47 | MEMCG_HIGH, |
48 | MEMCG_MAX, | |
49 | MEMCG_OOM, | |
fe6bdfc8 | 50 | MEMCG_OOM_KILL, |
b6bf9abb | 51 | MEMCG_OOM_GROUP_KILL, |
4b82ab4f | 52 | MEMCG_SWAP_HIGH, |
f3a53a3a TH |
53 | MEMCG_SWAP_MAX, |
54 | MEMCG_SWAP_FAIL, | |
e27be240 | 55 | MEMCG_NR_MEMORY_EVENTS, |
71cd3113 JW |
56 | }; |
57 | ||
5660048c | 58 | struct mem_cgroup_reclaim_cookie { |
ef8f2327 | 59 | pg_data_t *pgdat; |
ec0db74b | 60 | int generation; |
5660048c JW |
61 | }; |
62 | ||
71cd3113 JW |
63 | #ifdef CONFIG_MEMCG |
64 | ||
65 | #define MEM_CGROUP_ID_SHIFT 16 | |
71cd3113 JW |
66 | |
67 | struct mem_cgroup_id { | |
68 | int id; | |
1c2d479a | 69 | refcount_t ref; |
71cd3113 JW |
70 | }; |
71 | ||
410f8e82 | 72 | struct memcg_vmstats_percpu; |
5d383b69 | 73 | struct memcg1_events_percpu; |
410f8e82 | 74 | struct memcg_vmstats; |
70a64b79 SB |
75 | struct lruvec_stats_percpu; |
76 | struct lruvec_stats; | |
33398cf2 MH |
77 | |
78 | struct mem_cgroup_reclaim_iter { | |
79 | struct mem_cgroup *position; | |
80 | /* scan generation, increased every round-trip */ | |
ec0db74b | 81 | atomic_t generation; |
33398cf2 MH |
82 | }; |
83 | ||
84 | /* | |
242c37b4 | 85 | * per-node information in memory controller. |
33398cf2 | 86 | */ |
ef8f2327 | 87 | struct mem_cgroup_per_node { |
fefc6e66 SB |
88 | /* Keep the read-only fields at the start */ |
89 | struct mem_cgroup *memcg; /* Back pointer, we cannot */ | |
90 | /* use container_of */ | |
a983b5eb | 91 | |
7e1c0d6f | 92 | struct lruvec_stats_percpu __percpu *lruvec_stats_percpu; |
70a64b79 | 93 | struct lruvec_stats *lruvec_stats; |
e4262c4f | 94 | struct shrinker_info __rcu *shrinker_info; |
0a432dcb | 95 | |
98c9daf5 | 96 | #ifdef CONFIG_MEMCG_V1 |
fefc6e66 SB |
97 | /* |
98 | * Memcg-v1 only stuff in middle as buffer between read mostly fields | |
6df13230 RG |
99 | * and update often fields to avoid false sharing. If v1 stuff is |
100 | * not present, an explicit padding is needed. | |
fefc6e66 SB |
101 | */ |
102 | ||
33398cf2 MH |
103 | struct rb_node tree_node; /* RB tree node */ |
104 | unsigned long usage_in_excess;/* Set to the value by which */ | |
105 | /* the soft limit is exceeded*/ | |
106 | bool on_tree; | |
6df13230 RG |
107 | #else |
108 | CACHELINE_PADDING(_pad1_); | |
98c9daf5 | 109 | #endif |
fefc6e66 SB |
110 | |
111 | /* Fields which get updated often at the end. */ | |
112 | struct lruvec lruvec; | |
f59adcf5 | 113 | CACHELINE_PADDING(_pad2_); |
fefc6e66 SB |
114 | unsigned long lru_zone_size[MAX_NR_ZONES][NR_LRU_LISTS]; |
115 | struct mem_cgroup_reclaim_iter iter; | |
33398cf2 MH |
116 | }; |
117 | ||
33398cf2 MH |
118 | struct mem_cgroup_threshold { |
119 | struct eventfd_ctx *eventfd; | |
120 | unsigned long threshold; | |
121 | }; | |
122 | ||
123 | /* For threshold */ | |
124 | struct mem_cgroup_threshold_ary { | |
125 | /* An array index points to threshold just below or equal to usage. */ | |
126 | int current_threshold; | |
127 | /* Size of entries[] */ | |
128 | unsigned int size; | |
129 | /* Array of thresholds */ | |
b7c67206 | 130 | struct mem_cgroup_threshold entries[] __counted_by(size); |
33398cf2 MH |
131 | }; |
132 | ||
133 | struct mem_cgroup_thresholds { | |
134 | /* Primary thresholds array */ | |
135 | struct mem_cgroup_threshold_ary *primary; | |
136 | /* | |
137 | * Spare threshold array. | |
138 | * This is needed to make mem_cgroup_unregister_event() "never fail". | |
139 | * It must be able to store at least primary->size - 1 entries. | |
140 | */ | |
141 | struct mem_cgroup_threshold_ary *spare; | |
142 | }; | |
143 | ||
97b27821 TH |
144 | /* |
145 | * Remember four most recent foreign writebacks with dirty pages in this | |
146 | * cgroup. Inode sharing is expected to be uncommon and, even if we miss | |
147 | * one in a given round, we're likely to catch it later if it keeps | |
148 | * foreign-dirtying, so a fairly low count should be enough. | |
149 | * | |
150 | * See mem_cgroup_track_foreign_dirty_slowpath() for details. | |
151 | */ | |
152 | #define MEMCG_CGWB_FRN_CNT 4 | |
153 | ||
154 | struct memcg_cgwb_frn { | |
155 | u64 bdi_id; /* bdi->id of the foreign inode */ | |
156 | int memcg_id; /* memcg->css.id of foreign inode */ | |
157 | u64 at; /* jiffies_64 at the time of dirtying */ | |
158 | struct wb_completion done; /* tracks in-flight foreign writebacks */ | |
159 | }; | |
160 | ||
bf4f0599 RG |
161 | /* |
162 | * Bucket for arbitrarily byte-sized objects charged to a memory | |
163 | * cgroup. The bucket can be reparented in one piece when the cgroup | |
164 | * is destroyed, without having to round up the individual references | |
165 | * of all live memory objects in the wild. | |
166 | */ | |
167 | struct obj_cgroup { | |
168 | struct percpu_ref refcnt; | |
169 | struct mem_cgroup *memcg; | |
170 | atomic_t nr_charged_bytes; | |
171 | union { | |
0764db9b | 172 | struct list_head list; /* protected by objcg_lock */ |
bf4f0599 RG |
173 | struct rcu_head rcu; |
174 | }; | |
175 | }; | |
176 | ||
33398cf2 MH |
177 | /* |
178 | * The memory controller data structure. The memory controller controls both | |
179 | * page cache and RSS per cgroup. We would eventually like to provide | |
180 | * statistics based on the statistics developed by Rik Van Riel for clock-pro, | |
181 | * to help the administrator determine what knobs to tune. | |
182 | */ | |
183 | struct mem_cgroup { | |
184 | struct cgroup_subsys_state css; | |
185 | ||
73f576c0 JW |
186 | /* Private memcg ID. Used to ID objects that outlive the cgroup */ |
187 | struct mem_cgroup_id id; | |
188 | ||
33398cf2 | 189 | /* Accounted resources */ |
bd0b230f WL |
190 | struct page_counter memory; /* Both v1 & v2 */ |
191 | ||
192 | union { | |
193 | struct page_counter swap; /* v2 only */ | |
194 | struct page_counter memsw; /* v1 only */ | |
195 | }; | |
0db15298 | 196 | |
c6f53ed8 DF |
197 | /* registered local peak watchers */ |
198 | struct list_head memory_peaks; | |
199 | struct list_head swap_peaks; | |
200 | spinlock_t peaks_lock; | |
201 | ||
f7e1cb6e JW |
202 | /* Range enforcement for interrupt charges */ |
203 | struct work_struct high_work; | |
204 | ||
3a3b7fec | 205 | #ifdef CONFIG_ZSWAP |
f4840ccf | 206 | unsigned long zswap_max; |
501a06fe NP |
207 | |
208 | /* | |
209 | * Prevent pages from this memcg from being written back from zswap to | |
210 | * swap, and from being swapped out on zswap store failures. | |
211 | */ | |
212 | bool zswap_writeback; | |
f4840ccf JW |
213 | #endif |
214 | ||
33398cf2 MH |
215 | /* vmpressure notifications */ |
216 | struct vmpressure vmpressure; | |
217 | ||
3d8b38eb RG |
218 | /* |
219 | * Should the OOM killer kill all belonging tasks, had it kill one? | |
220 | */ | |
221 | bool oom_group; | |
222 | ||
94b7e5bf | 223 | int swappiness; |
33398cf2 | 224 | |
1e577f97 | 225 | /* memory.events and memory.events.local */ |
472912a2 | 226 | struct cgroup_file events_file; |
1e577f97 | 227 | struct cgroup_file events_local_file; |
472912a2 | 228 | |
f3a53a3a TH |
229 | /* handle for "memory.swap.events" */ |
230 | struct cgroup_file swap_events_file; | |
231 | ||
2d146aa3 | 232 | /* memory.stat */ |
410f8e82 | 233 | struct memcg_vmstats *vmstats; |
42a30035 | 234 | |
815744d7 | 235 | /* memory.events */ |
42a30035 | 236 | atomic_long_t memory_events[MEMCG_NR_MEMORY_EVENTS]; |
1e577f97 | 237 | atomic_long_t memory_events_local[MEMCG_NR_MEMORY_EVENTS]; |
33398cf2 | 238 | |
ac8a5296 AW |
239 | /* |
240 | * Hint of reclaim pressure for socket memroy management. Note | |
241 | * that this indicator should NOT be used in legacy cgroup mode | |
242 | * where socket memory is accounted/charged separately. | |
243 | */ | |
d886f4e4 JW |
244 | unsigned long socket_pressure; |
245 | ||
33398cf2 | 246 | int kmemcg_id; |
675d6c9b RG |
247 | /* |
248 | * memcg->objcg is wiped out as a part of the objcg repaprenting | |
249 | * process. memcg->orig_objcg preserves a pointer (and a reference) | |
250 | * to the original objcg until the end of live of memcg. | |
251 | */ | |
252 | struct obj_cgroup __rcu *objcg; | |
253 | struct obj_cgroup *orig_objcg; | |
0764db9b RG |
254 | /* list of inherited objcgs, protected by objcg_lock */ |
255 | struct list_head objcg_list; | |
33398cf2 | 256 | |
4df91062 FT |
257 | struct memcg_vmstats_percpu __percpu *vmstats_percpu; |
258 | ||
33398cf2 MH |
259 | #ifdef CONFIG_CGROUP_WRITEBACK |
260 | struct list_head cgwb_list; | |
261 | struct wb_domain cgwb_domain; | |
97b27821 | 262 | struct memcg_cgwb_frn cgwb_frn[MEMCG_CGWB_FRN_CNT]; |
33398cf2 MH |
263 | #endif |
264 | ||
87eaceb3 YS |
265 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
266 | struct deferred_split deferred_split_queue; | |
267 | #endif | |
268 | ||
61dd3f24 | 269 | #ifdef CONFIG_LRU_GEN_WALKS_MMU |
bd74fdae YZ |
270 | /* per-memcg mm_struct list */ |
271 | struct lru_gen_mm_list mm_list; | |
272 | #endif | |
273 | ||
94b7e5bf RG |
274 | #ifdef CONFIG_MEMCG_V1 |
275 | /* Legacy consumer-oriented counters */ | |
276 | struct page_counter kmem; /* v1 only */ | |
277 | struct page_counter tcpmem; /* v1 only */ | |
278 | ||
0ccaf421 SB |
279 | struct memcg1_events_percpu __percpu *events_percpu; |
280 | ||
94b7e5bf RG |
281 | unsigned long soft_limit; |
282 | ||
283 | /* protected by memcg_oom_lock */ | |
284 | bool oom_lock; | |
285 | int under_oom; | |
286 | ||
287 | /* OOM-Killer disable */ | |
288 | int oom_kill_disable; | |
289 | ||
290 | /* protect arrays of thresholds */ | |
291 | struct mutex thresholds_lock; | |
292 | ||
293 | /* thresholds for memory usage. RCU-protected */ | |
294 | struct mem_cgroup_thresholds thresholds; | |
295 | ||
296 | /* thresholds for mem+swap usage. RCU-protected */ | |
297 | struct mem_cgroup_thresholds memsw_thresholds; | |
298 | ||
299 | /* For oom notifier event fd */ | |
300 | struct list_head oom_notify; | |
301 | ||
302 | /* | |
303 | * Should we move charges of a task when a task is moved into this | |
304 | * mem_cgroup ? And what type of charges should we move ? | |
305 | */ | |
306 | unsigned long move_charge_at_immigrate; | |
307 | /* taken only while moving_account > 0 */ | |
308 | spinlock_t move_lock; | |
309 | unsigned long move_lock_flags; | |
310 | ||
311 | /* Legacy tcp memory accounting */ | |
312 | bool tcpmem_active; | |
313 | int tcpmem_pressure; | |
314 | ||
94b7e5bf RG |
315 | /* |
316 | * set > 0 if pages under this cgroup are moving to other cgroup. | |
317 | */ | |
318 | atomic_t moving_account; | |
319 | struct task_struct *move_lock_task; | |
320 | ||
321 | /* List of events which userspace want to receive */ | |
322 | struct list_head event_list; | |
323 | spinlock_t event_list_lock; | |
324 | #endif /* CONFIG_MEMCG_V1 */ | |
325 | ||
b51478a0 | 326 | struct mem_cgroup_per_node *nodeinfo[]; |
33398cf2 | 327 | }; |
7d828602 | 328 | |
a983b5eb | 329 | /* |
1813e51e SB |
330 | * size of first charge trial. |
331 | * TODO: maybe necessary to use big numbers in big irons or dynamic based of the | |
332 | * workload. | |
a983b5eb | 333 | */ |
1813e51e | 334 | #define MEMCG_CHARGE_BATCH 64U |
a983b5eb | 335 | |
7d828602 | 336 | extern struct mem_cgroup *root_mem_cgroup; |
56161634 | 337 | |
87944e29 | 338 | enum page_memcg_data_flags { |
21c690a3 SB |
339 | /* page->memcg_data is a pointer to an slabobj_ext vector */ |
340 | MEMCG_DATA_OBJEXTS = (1UL << 0), | |
18b2db3b RG |
341 | /* page has been accounted as a non-slab kernel page */ |
342 | MEMCG_DATA_KMEM = (1UL << 1), | |
87944e29 | 343 | /* the next bit after the last actual flag */ |
18b2db3b | 344 | __NR_MEMCG_DATA_FLAGS = (1UL << 2), |
87944e29 RG |
345 | }; |
346 | ||
53ce7203 SB |
347 | #define __FIRST_OBJEXT_FLAG __NR_MEMCG_DATA_FLAGS |
348 | ||
349 | #else /* CONFIG_MEMCG */ | |
350 | ||
351 | #define __FIRST_OBJEXT_FLAG (1UL << 0) | |
352 | ||
353 | #endif /* CONFIG_MEMCG */ | |
354 | ||
355 | enum objext_flags { | |
09c46563 SB |
356 | /* slabobj_ext vector failed to allocate */ |
357 | OBJEXTS_ALLOC_FAIL = __FIRST_OBJEXT_FLAG, | |
53ce7203 | 358 | /* the next bit after the last actual flag */ |
09c46563 | 359 | __NR_OBJEXTS_FLAGS = (__FIRST_OBJEXT_FLAG << 1), |
53ce7203 SB |
360 | }; |
361 | ||
362 | #define OBJEXTS_FLAGS_MASK (__NR_OBJEXTS_FLAGS - 1) | |
363 | ||
364 | #ifdef CONFIG_MEMCG | |
87944e29 | 365 | |
1b7e4464 | 366 | static inline bool folio_memcg_kmem(struct folio *folio); |
b4e0b68f MS |
367 | |
368 | /* | |
369 | * After the initialization objcg->memcg is always pointing at | |
370 | * a valid memcg, but can be atomically swapped to the parent memcg. | |
371 | * | |
02f4bbef | 372 | * The caller must ensure that the returned memcg won't be released. |
b4e0b68f MS |
373 | */ |
374 | static inline struct mem_cgroup *obj_cgroup_memcg(struct obj_cgroup *objcg) | |
375 | { | |
02f4bbef | 376 | lockdep_assert_once(rcu_read_lock_held() || lockdep_is_held(&cgroup_mutex)); |
b4e0b68f MS |
377 | return READ_ONCE(objcg->memcg); |
378 | } | |
379 | ||
380 | /* | |
1b7e4464 MWO |
381 | * __folio_memcg - Get the memory cgroup associated with a non-kmem folio |
382 | * @folio: Pointer to the folio. | |
b4e0b68f | 383 | * |
1b7e4464 MWO |
384 | * Returns a pointer to the memory cgroup associated with the folio, |
385 | * or NULL. This function assumes that the folio is known to have a | |
b4e0b68f | 386 | * proper memory cgroup pointer. It's not safe to call this function |
1b7e4464 MWO |
387 | * against some type of folios, e.g. slab folios or ex-slab folios or |
388 | * kmem folios. | |
b4e0b68f | 389 | */ |
1b7e4464 | 390 | static inline struct mem_cgroup *__folio_memcg(struct folio *folio) |
b4e0b68f | 391 | { |
1b7e4464 | 392 | unsigned long memcg_data = folio->memcg_data; |
b4e0b68f | 393 | |
1b7e4464 | 394 | VM_BUG_ON_FOLIO(folio_test_slab(folio), folio); |
21c690a3 | 395 | VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_OBJEXTS, folio); |
1b7e4464 | 396 | VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_KMEM, folio); |
b4e0b68f | 397 | |
53ce7203 | 398 | return (struct mem_cgroup *)(memcg_data & ~OBJEXTS_FLAGS_MASK); |
b4e0b68f MS |
399 | } |
400 | ||
401 | /* | |
1b7e4464 MWO |
402 | * __folio_objcg - get the object cgroup associated with a kmem folio. |
403 | * @folio: Pointer to the folio. | |
b4e0b68f | 404 | * |
1b7e4464 MWO |
405 | * Returns a pointer to the object cgroup associated with the folio, |
406 | * or NULL. This function assumes that the folio is known to have a | |
b4e0b68f | 407 | * proper object cgroup pointer. It's not safe to call this function |
1b7e4464 MWO |
408 | * against some type of folios, e.g. slab folios or ex-slab folios or |
409 | * LRU folios. | |
b4e0b68f | 410 | */ |
1b7e4464 | 411 | static inline struct obj_cgroup *__folio_objcg(struct folio *folio) |
b4e0b68f | 412 | { |
1b7e4464 | 413 | unsigned long memcg_data = folio->memcg_data; |
b4e0b68f | 414 | |
1b7e4464 | 415 | VM_BUG_ON_FOLIO(folio_test_slab(folio), folio); |
21c690a3 | 416 | VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_OBJEXTS, folio); |
1b7e4464 | 417 | VM_BUG_ON_FOLIO(!(memcg_data & MEMCG_DATA_KMEM), folio); |
b4e0b68f | 418 | |
53ce7203 | 419 | return (struct obj_cgroup *)(memcg_data & ~OBJEXTS_FLAGS_MASK); |
b4e0b68f MS |
420 | } |
421 | ||
bcfe06bf | 422 | /* |
1b7e4464 MWO |
423 | * folio_memcg - Get the memory cgroup associated with a folio. |
424 | * @folio: Pointer to the folio. | |
bcfe06bf | 425 | * |
1b7e4464 MWO |
426 | * Returns a pointer to the memory cgroup associated with the folio, |
427 | * or NULL. This function assumes that the folio is known to have a | |
bcfe06bf | 428 | * proper memory cgroup pointer. It's not safe to call this function |
1b7e4464 | 429 | * against some type of folios, e.g. slab folios or ex-slab folios. |
bcfe06bf | 430 | * |
1b7e4464 | 431 | * For a non-kmem folio any of the following ensures folio and memcg binding |
b4e0b68f MS |
432 | * stability: |
433 | * | |
1b7e4464 | 434 | * - the folio lock |
bcfe06bf | 435 | * - LRU isolation |
6c77b607 | 436 | * - folio_memcg_lock() |
bcfe06bf | 437 | * - exclusive reference |
018ee47f | 438 | * - mem_cgroup_trylock_pages() |
b4e0b68f | 439 | * |
1b7e4464 MWO |
440 | * For a kmem folio a caller should hold an rcu read lock to protect memcg |
441 | * associated with a kmem folio from being released. | |
bcfe06bf | 442 | */ |
1b7e4464 MWO |
443 | static inline struct mem_cgroup *folio_memcg(struct folio *folio) |
444 | { | |
445 | if (folio_memcg_kmem(folio)) | |
446 | return obj_cgroup_memcg(__folio_objcg(folio)); | |
447 | return __folio_memcg(folio); | |
448 | } | |
449 | ||
02f4bbef MS |
450 | /* |
451 | * folio_memcg_charged - If a folio is charged to a memory cgroup. | |
452 | * @folio: Pointer to the folio. | |
453 | * | |
454 | * Returns true if folio is charged to a memory cgroup, otherwise returns false. | |
455 | */ | |
456 | static inline bool folio_memcg_charged(struct folio *folio) | |
457 | { | |
458 | if (folio_memcg_kmem(folio)) | |
459 | return __folio_objcg(folio) != NULL; | |
460 | return __folio_memcg(folio) != NULL; | |
461 | } | |
462 | ||
c5ce619a MWO |
463 | /** |
464 | * folio_memcg_rcu - Locklessly get the memory cgroup associated with a folio. | |
465 | * @folio: Pointer to the folio. | |
bcfe06bf | 466 | * |
c5ce619a | 467 | * This function assumes that the folio is known to have a |
bcfe06bf | 468 | * proper memory cgroup pointer. It's not safe to call this function |
c5ce619a MWO |
469 | * against some type of folios, e.g. slab folios or ex-slab folios. |
470 | * | |
471 | * Return: A pointer to the memory cgroup associated with the folio, | |
472 | * or NULL. | |
bcfe06bf | 473 | */ |
c5ce619a | 474 | static inline struct mem_cgroup *folio_memcg_rcu(struct folio *folio) |
bcfe06bf | 475 | { |
c5ce619a | 476 | unsigned long memcg_data = READ_ONCE(folio->memcg_data); |
b4e0b68f | 477 | |
c5ce619a | 478 | VM_BUG_ON_FOLIO(folio_test_slab(folio), folio); |
bcfe06bf | 479 | |
b4e0b68f MS |
480 | if (memcg_data & MEMCG_DATA_KMEM) { |
481 | struct obj_cgroup *objcg; | |
482 | ||
53ce7203 | 483 | objcg = (void *)(memcg_data & ~OBJEXTS_FLAGS_MASK); |
b4e0b68f MS |
484 | return obj_cgroup_memcg(objcg); |
485 | } | |
486 | ||
02f4bbef MS |
487 | WARN_ON_ONCE(!rcu_read_lock_held()); |
488 | ||
53ce7203 | 489 | return (struct mem_cgroup *)(memcg_data & ~OBJEXTS_FLAGS_MASK); |
bcfe06bf RG |
490 | } |
491 | ||
492 | /* | |
becacb04 MW |
493 | * folio_memcg_check - Get the memory cgroup associated with a folio. |
494 | * @folio: Pointer to the folio. | |
bcfe06bf | 495 | * |
becacb04 MW |
496 | * Returns a pointer to the memory cgroup associated with the folio, |
497 | * or NULL. This function unlike folio_memcg() can take any folio | |
498 | * as an argument. It has to be used in cases when it's not known if a folio | |
b4e0b68f MS |
499 | * has an associated memory cgroup pointer or an object cgroups vector or |
500 | * an object cgroup. | |
501 | * | |
becacb04 | 502 | * For a non-kmem folio any of the following ensures folio and memcg binding |
b4e0b68f | 503 | * stability: |
bcfe06bf | 504 | * |
becacb04 | 505 | * - the folio lock |
bcfe06bf | 506 | * - LRU isolation |
becacb04 | 507 | * - lock_folio_memcg() |
bcfe06bf | 508 | * - exclusive reference |
018ee47f | 509 | * - mem_cgroup_trylock_pages() |
b4e0b68f | 510 | * |
becacb04 MW |
511 | * For a kmem folio a caller should hold an rcu read lock to protect memcg |
512 | * associated with a kmem folio from being released. | |
bcfe06bf | 513 | */ |
becacb04 | 514 | static inline struct mem_cgroup *folio_memcg_check(struct folio *folio) |
bcfe06bf RG |
515 | { |
516 | /* | |
becacb04 MW |
517 | * Because folio->memcg_data might be changed asynchronously |
518 | * for slabs, READ_ONCE() should be used here. | |
bcfe06bf | 519 | */ |
becacb04 | 520 | unsigned long memcg_data = READ_ONCE(folio->memcg_data); |
bcfe06bf | 521 | |
21c690a3 | 522 | if (memcg_data & MEMCG_DATA_OBJEXTS) |
bcfe06bf RG |
523 | return NULL; |
524 | ||
b4e0b68f MS |
525 | if (memcg_data & MEMCG_DATA_KMEM) { |
526 | struct obj_cgroup *objcg; | |
527 | ||
53ce7203 | 528 | objcg = (void *)(memcg_data & ~OBJEXTS_FLAGS_MASK); |
b4e0b68f MS |
529 | return obj_cgroup_memcg(objcg); |
530 | } | |
531 | ||
53ce7203 | 532 | return (struct mem_cgroup *)(memcg_data & ~OBJEXTS_FLAGS_MASK); |
18b2db3b RG |
533 | } |
534 | ||
becacb04 MW |
535 | static inline struct mem_cgroup *page_memcg_check(struct page *page) |
536 | { | |
537 | if (PageTail(page)) | |
538 | return NULL; | |
539 | return folio_memcg_check((struct folio *)page); | |
540 | } | |
541 | ||
88f2ef73 MS |
542 | static inline struct mem_cgroup *get_mem_cgroup_from_objcg(struct obj_cgroup *objcg) |
543 | { | |
544 | struct mem_cgroup *memcg; | |
545 | ||
546 | rcu_read_lock(); | |
547 | retry: | |
548 | memcg = obj_cgroup_memcg(objcg); | |
549 | if (unlikely(!css_tryget(&memcg->css))) | |
550 | goto retry; | |
551 | rcu_read_unlock(); | |
552 | ||
553 | return memcg; | |
554 | } | |
555 | ||
18b2db3b | 556 | /* |
1b7e4464 MWO |
557 | * folio_memcg_kmem - Check if the folio has the memcg_kmem flag set. |
558 | * @folio: Pointer to the folio. | |
18b2db3b | 559 | * |
1b7e4464 MWO |
560 | * Checks if the folio has MemcgKmem flag set. The caller must ensure |
561 | * that the folio has an associated memory cgroup. It's not safe to call | |
562 | * this function against some types of folios, e.g. slab folios. | |
18b2db3b | 563 | */ |
1b7e4464 | 564 | static inline bool folio_memcg_kmem(struct folio *folio) |
18b2db3b | 565 | { |
1b7e4464 | 566 | VM_BUG_ON_PGFLAGS(PageTail(&folio->page), &folio->page); |
21c690a3 | 567 | VM_BUG_ON_FOLIO(folio->memcg_data & MEMCG_DATA_OBJEXTS, folio); |
1b7e4464 | 568 | return folio->memcg_data & MEMCG_DATA_KMEM; |
bcfe06bf RG |
569 | } |
570 | ||
1b7e4464 MWO |
571 | static inline bool PageMemcgKmem(struct page *page) |
572 | { | |
573 | return folio_memcg_kmem(page_folio(page)); | |
574 | } | |
575 | ||
dfd2f10c KT |
576 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
577 | { | |
578 | return (memcg == root_mem_cgroup); | |
579 | } | |
580 | ||
23047a96 JW |
581 | static inline bool mem_cgroup_disabled(void) |
582 | { | |
583 | return !cgroup_subsys_enabled(memory_cgrp_subsys); | |
584 | } | |
585 | ||
f56ce412 JW |
586 | static inline void mem_cgroup_protection(struct mem_cgroup *root, |
587 | struct mem_cgroup *memcg, | |
588 | unsigned long *min, | |
589 | unsigned long *low) | |
9783aa99 | 590 | { |
f56ce412 JW |
591 | *min = *low = 0; |
592 | ||
1bc63fb1 | 593 | if (mem_cgroup_disabled()) |
f56ce412 | 594 | return; |
1bc63fb1 | 595 | |
22f7496f YS |
596 | /* |
597 | * There is no reclaim protection applied to a targeted reclaim. | |
598 | * We are special casing this specific case here because | |
5d241789 | 599 | * mem_cgroup_calculate_protection is not robust enough to keep |
22f7496f YS |
600 | * the protection invariant for calculated effective values for |
601 | * parallel reclaimers with different reclaim target. This is | |
602 | * especially a problem for tail memcgs (as they have pages on LRU) | |
603 | * which would want to have effective values 0 for targeted reclaim | |
604 | * but a different value for external reclaim. | |
605 | * | |
606 | * Example | |
607 | * Let's have global and A's reclaim in parallel: | |
608 | * | | |
609 | * A (low=2G, usage = 3G, max = 3G, children_low_usage = 1.5G) | |
610 | * |\ | |
611 | * | C (low = 1G, usage = 2.5G) | |
612 | * B (low = 1G, usage = 0.5G) | |
613 | * | |
614 | * For the global reclaim | |
615 | * A.elow = A.low | |
616 | * B.elow = min(B.usage, B.low) because children_low_usage <= A.elow | |
617 | * C.elow = min(C.usage, C.low) | |
618 | * | |
619 | * With the effective values resetting we have A reclaim | |
620 | * A.elow = 0 | |
621 | * B.elow = B.low | |
622 | * C.elow = C.low | |
623 | * | |
624 | * If the global reclaim races with A's reclaim then | |
625 | * B.elow = C.elow = 0 because children_low_usage > A.elow) | |
626 | * is possible and reclaiming B would be violating the protection. | |
627 | * | |
628 | */ | |
629 | if (root == memcg) | |
f56ce412 | 630 | return; |
9783aa99 | 631 | |
f56ce412 JW |
632 | *min = READ_ONCE(memcg->memory.emin); |
633 | *low = READ_ONCE(memcg->memory.elow); | |
9783aa99 CD |
634 | } |
635 | ||
45c7f7e1 CD |
636 | void mem_cgroup_calculate_protection(struct mem_cgroup *root, |
637 | struct mem_cgroup *memcg); | |
638 | ||
adb82130 YA |
639 | static inline bool mem_cgroup_unprotected(struct mem_cgroup *target, |
640 | struct mem_cgroup *memcg) | |
45c7f7e1 CD |
641 | { |
642 | /* | |
643 | * The root memcg doesn't account charges, and doesn't support | |
adb82130 YA |
644 | * protection. The target memcg's protection is ignored, see |
645 | * mem_cgroup_calculate_protection() and mem_cgroup_protection() | |
45c7f7e1 | 646 | */ |
adb82130 YA |
647 | return mem_cgroup_disabled() || mem_cgroup_is_root(memcg) || |
648 | memcg == target; | |
45c7f7e1 CD |
649 | } |
650 | ||
adb82130 YA |
651 | static inline bool mem_cgroup_below_low(struct mem_cgroup *target, |
652 | struct mem_cgroup *memcg) | |
45c7f7e1 | 653 | { |
adb82130 | 654 | if (mem_cgroup_unprotected(target, memcg)) |
45c7f7e1 CD |
655 | return false; |
656 | ||
657 | return READ_ONCE(memcg->memory.elow) >= | |
658 | page_counter_read(&memcg->memory); | |
659 | } | |
660 | ||
adb82130 YA |
661 | static inline bool mem_cgroup_below_min(struct mem_cgroup *target, |
662 | struct mem_cgroup *memcg) | |
45c7f7e1 | 663 | { |
adb82130 | 664 | if (mem_cgroup_unprotected(target, memcg)) |
45c7f7e1 CD |
665 | return false; |
666 | ||
667 | return READ_ONCE(memcg->memory.emin) >= | |
668 | page_counter_read(&memcg->memory); | |
669 | } | |
241994ed | 670 | |
4b569387 NP |
671 | void mem_cgroup_commit_charge(struct folio *folio, struct mem_cgroup *memcg); |
672 | ||
8f425e4e MWO |
673 | int __mem_cgroup_charge(struct folio *folio, struct mm_struct *mm, gfp_t gfp); |
674 | ||
675 | /** | |
676 | * mem_cgroup_charge - Charge a newly allocated folio to a cgroup. | |
677 | * @folio: Folio to charge. | |
678 | * @mm: mm context of the allocating task. | |
679 | * @gfp: Reclaim mode. | |
680 | * | |
681 | * Try to charge @folio to the memcg that @mm belongs to, reclaiming | |
682 | * pages according to @gfp if necessary. If @mm is NULL, try to | |
683 | * charge to the active memcg. | |
684 | * | |
685 | * Do not use this for folios allocated for swapin. | |
686 | * | |
687 | * Return: 0 on success. Otherwise, an error code is returned. | |
688 | */ | |
689 | static inline int mem_cgroup_charge(struct folio *folio, struct mm_struct *mm, | |
690 | gfp_t gfp) | |
2c8d8f97 SB |
691 | { |
692 | if (mem_cgroup_disabled()) | |
693 | return 0; | |
8f425e4e | 694 | return __mem_cgroup_charge(folio, mm, gfp); |
2c8d8f97 SB |
695 | } |
696 | ||
8cba9576 NP |
697 | int mem_cgroup_hugetlb_try_charge(struct mem_cgroup *memcg, gfp_t gfp, |
698 | long nr_pages); | |
699 | ||
65995918 | 700 | int mem_cgroup_swapin_charge_folio(struct folio *folio, struct mm_struct *mm, |
0add0c77 | 701 | gfp_t gfp, swp_entry_t entry); |
325efb16 BS |
702 | |
703 | void mem_cgroup_swapin_uncharge_swap(swp_entry_t entry, unsigned int nr_pages); | |
3fea5a49 | 704 | |
bbc6b703 MWO |
705 | void __mem_cgroup_uncharge(struct folio *folio); |
706 | ||
707 | /** | |
708 | * mem_cgroup_uncharge - Uncharge a folio. | |
709 | * @folio: Folio to uncharge. | |
710 | * | |
711 | * Uncharge a folio previously charged with mem_cgroup_charge(). | |
712 | */ | |
713 | static inline void mem_cgroup_uncharge(struct folio *folio) | |
2c8d8f97 SB |
714 | { |
715 | if (mem_cgroup_disabled()) | |
716 | return; | |
bbc6b703 | 717 | __mem_cgroup_uncharge(folio); |
2c8d8f97 SB |
718 | } |
719 | ||
4882c809 MWO |
720 | void __mem_cgroup_uncharge_folios(struct folio_batch *folios); |
721 | static inline void mem_cgroup_uncharge_folios(struct folio_batch *folios) | |
722 | { | |
723 | if (mem_cgroup_disabled()) | |
724 | return; | |
725 | __mem_cgroup_uncharge_folios(folios); | |
726 | } | |
4b569387 | 727 | |
4882c809 | 728 | void mem_cgroup_cancel_charge(struct mem_cgroup *memcg, unsigned int nr_pages); |
85ce2c51 | 729 | void mem_cgroup_replace_folio(struct folio *old, struct folio *new); |
d21bba2b | 730 | void mem_cgroup_migrate(struct folio *old, struct folio *new); |
569b846d | 731 | |
55779ec7 | 732 | /** |
867e5e1d | 733 | * mem_cgroup_lruvec - get the lru list vector for a memcg & node |
55779ec7 | 734 | * @memcg: memcg of the wanted lruvec |
9a1ac228 | 735 | * @pgdat: pglist_data |
55779ec7 | 736 | * |
867e5e1d | 737 | * Returns the lru list vector holding pages for a given @memcg & |
9a1ac228 | 738 | * @pgdat combination. This can be the node lruvec, if the memory |
867e5e1d | 739 | * controller is disabled. |
55779ec7 | 740 | */ |
867e5e1d JW |
741 | static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg, |
742 | struct pglist_data *pgdat) | |
55779ec7 | 743 | { |
ef8f2327 | 744 | struct mem_cgroup_per_node *mz; |
55779ec7 JW |
745 | struct lruvec *lruvec; |
746 | ||
747 | if (mem_cgroup_disabled()) { | |
867e5e1d | 748 | lruvec = &pgdat->__lruvec; |
55779ec7 JW |
749 | goto out; |
750 | } | |
751 | ||
1b05117d JW |
752 | if (!memcg) |
753 | memcg = root_mem_cgroup; | |
754 | ||
a3747b53 | 755 | mz = memcg->nodeinfo[pgdat->node_id]; |
55779ec7 JW |
756 | lruvec = &mz->lruvec; |
757 | out: | |
758 | /* | |
759 | * Since a node can be onlined after the mem_cgroup was created, | |
599d0c95 | 760 | * we have to be prepared to initialize lruvec->pgdat here; |
55779ec7 JW |
761 | * and if offlined then reonlined, we need to reinitialize it. |
762 | */ | |
ef8f2327 MG |
763 | if (unlikely(lruvec->pgdat != pgdat)) |
764 | lruvec->pgdat = pgdat; | |
55779ec7 JW |
765 | return lruvec; |
766 | } | |
767 | ||
9a1ac228 | 768 | /** |
b1baabd9 MWO |
769 | * folio_lruvec - return lruvec for isolating/putting an LRU folio |
770 | * @folio: Pointer to the folio. | |
9a1ac228 | 771 | * |
b1baabd9 | 772 | * This function relies on folio->mem_cgroup being stable. |
9a1ac228 | 773 | */ |
b1baabd9 | 774 | static inline struct lruvec *folio_lruvec(struct folio *folio) |
9a1ac228 | 775 | { |
b1baabd9 | 776 | struct mem_cgroup *memcg = folio_memcg(folio); |
9a1ac228 | 777 | |
b1baabd9 MWO |
778 | VM_WARN_ON_ONCE_FOLIO(!memcg && !mem_cgroup_disabled(), folio); |
779 | return mem_cgroup_lruvec(memcg, folio_pgdat(folio)); | |
9a1ac228 | 780 | } |
c9b0ed51 | 781 | |
64219994 | 782 | struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
e993d905 | 783 | |
d46eb14b SB |
784 | struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm); |
785 | ||
4b569387 NP |
786 | struct mem_cgroup *get_mem_cgroup_from_current(void); |
787 | ||
f77f0c75 KZ |
788 | struct mem_cgroup *get_mem_cgroup_from_folio(struct folio *folio); |
789 | ||
e809c3fe MWO |
790 | struct lruvec *folio_lruvec_lock(struct folio *folio); |
791 | struct lruvec *folio_lruvec_lock_irq(struct folio *folio); | |
792 | struct lruvec *folio_lruvec_lock_irqsave(struct folio *folio, | |
6168d0da AS |
793 | unsigned long *flags); |
794 | ||
795 | #ifdef CONFIG_DEBUG_VM | |
e809c3fe | 796 | void lruvec_memcg_debug(struct lruvec *lruvec, struct folio *folio); |
6168d0da | 797 | #else |
e809c3fe MWO |
798 | static inline |
799 | void lruvec_memcg_debug(struct lruvec *lruvec, struct folio *folio) | |
6168d0da AS |
800 | { |
801 | } | |
802 | #endif | |
803 | ||
33398cf2 MH |
804 | static inline |
805 | struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){ | |
806 | return css ? container_of(css, struct mem_cgroup, css) : NULL; | |
807 | } | |
808 | ||
bf4f0599 RG |
809 | static inline bool obj_cgroup_tryget(struct obj_cgroup *objcg) |
810 | { | |
811 | return percpu_ref_tryget(&objcg->refcnt); | |
812 | } | |
813 | ||
814 | static inline void obj_cgroup_get(struct obj_cgroup *objcg) | |
815 | { | |
816 | percpu_ref_get(&objcg->refcnt); | |
817 | } | |
818 | ||
b4e0b68f MS |
819 | static inline void obj_cgroup_get_many(struct obj_cgroup *objcg, |
820 | unsigned long nr) | |
bf4f0599 | 821 | { |
b4e0b68f | 822 | percpu_ref_get_many(&objcg->refcnt, nr); |
bf4f0599 RG |
823 | } |
824 | ||
b4e0b68f | 825 | static inline void obj_cgroup_put(struct obj_cgroup *objcg) |
bf4f0599 | 826 | { |
91b71e78 YA |
827 | if (objcg) |
828 | percpu_ref_put(&objcg->refcnt); | |
bf4f0599 RG |
829 | } |
830 | ||
e4dde56c YZ |
831 | static inline bool mem_cgroup_tryget(struct mem_cgroup *memcg) |
832 | { | |
833 | return !memcg || css_tryget(&memcg->css); | |
834 | } | |
835 | ||
fdc4161f NP |
836 | static inline bool mem_cgroup_tryget_online(struct mem_cgroup *memcg) |
837 | { | |
838 | return !memcg || css_tryget_online(&memcg->css); | |
839 | } | |
840 | ||
dc0b5864 RG |
841 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
842 | { | |
d46eb14b SB |
843 | if (memcg) |
844 | css_put(&memcg->css); | |
dc0b5864 RG |
845 | } |
846 | ||
8e8ae645 JW |
847 | #define mem_cgroup_from_counter(counter, member) \ |
848 | container_of(counter, struct mem_cgroup, member) | |
849 | ||
33398cf2 MH |
850 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
851 | struct mem_cgroup *, | |
852 | struct mem_cgroup_reclaim_cookie *); | |
853 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); | |
025b7799 Z |
854 | void mem_cgroup_scan_tasks(struct mem_cgroup *memcg, |
855 | int (*)(struct task_struct *, void *), void *arg); | |
33398cf2 | 856 | |
23047a96 JW |
857 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
858 | { | |
859 | if (mem_cgroup_disabled()) | |
860 | return 0; | |
861 | ||
73f576c0 | 862 | return memcg->id.id; |
23047a96 | 863 | } |
73f576c0 | 864 | struct mem_cgroup *mem_cgroup_from_id(unsigned short id); |
23047a96 | 865 | |
c15187a4 RG |
866 | #ifdef CONFIG_SHRINKER_DEBUG |
867 | static inline unsigned long mem_cgroup_ino(struct mem_cgroup *memcg) | |
868 | { | |
869 | return memcg ? cgroup_ino(memcg->css.cgroup) : 0; | |
870 | } | |
871 | ||
872 | struct mem_cgroup *mem_cgroup_get_from_ino(unsigned long ino); | |
873 | #endif | |
874 | ||
aa9694bb CD |
875 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
876 | { | |
877 | return mem_cgroup_from_css(seq_css(m)); | |
878 | } | |
879 | ||
2262185c RG |
880 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
881 | { | |
882 | struct mem_cgroup_per_node *mz; | |
883 | ||
884 | if (mem_cgroup_disabled()) | |
885 | return NULL; | |
886 | ||
887 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
888 | return mz->memcg; | |
889 | } | |
890 | ||
8e8ae645 JW |
891 | /** |
892 | * parent_mem_cgroup - find the accounting parent of a memcg | |
893 | * @memcg: memcg whose parent to find | |
894 | * | |
ca39c5e7 | 895 | * Returns the parent memcg, or NULL if this is the root. |
8e8ae645 JW |
896 | */ |
897 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) | |
898 | { | |
486bc706 | 899 | return mem_cgroup_from_css(memcg->css.parent); |
8e8ae645 JW |
900 | } |
901 | ||
33398cf2 MH |
902 | static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, |
903 | struct mem_cgroup *root) | |
904 | { | |
905 | if (root == memcg) | |
906 | return true; | |
33398cf2 MH |
907 | return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup); |
908 | } | |
e1aab161 | 909 | |
2314b42d JW |
910 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
911 | struct mem_cgroup *memcg) | |
2e4d4091 | 912 | { |
587af308 | 913 | struct mem_cgroup *task_memcg; |
413918bb | 914 | bool match = false; |
c3ac9a8a | 915 | |
2e4d4091 | 916 | rcu_read_lock(); |
587af308 | 917 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
413918bb | 918 | if (task_memcg) |
2314b42d | 919 | match = mem_cgroup_is_descendant(task_memcg, memcg); |
2e4d4091 | 920 | rcu_read_unlock(); |
c3ac9a8a | 921 | return match; |
2e4d4091 | 922 | } |
8a9f3ccd | 923 | |
75376c6f | 924 | struct cgroup_subsys_state *mem_cgroup_css_from_folio(struct folio *folio); |
2fc04524 | 925 | ino_t page_cgroup_ino(struct page *page); |
d324236b | 926 | |
eb01aaab VD |
927 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
928 | { | |
929 | if (mem_cgroup_disabled()) | |
930 | return true; | |
931 | return !!(memcg->css.flags & CSS_ONLINE); | |
932 | } | |
933 | ||
33398cf2 | 934 | void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, |
b4536f0c | 935 | int zid, int nr_pages); |
33398cf2 | 936 | |
b4536f0c MH |
937 | static inline |
938 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
939 | enum lru_list lru, int zone_idx) | |
940 | { | |
941 | struct mem_cgroup_per_node *mz; | |
942 | ||
943 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
e0e3f42f | 944 | return READ_ONCE(mz->lru_zone_size[zone_idx][lru]); |
33398cf2 MH |
945 | } |
946 | ||
9ea9cb00 | 947 | void mem_cgroup_handle_over_high(gfp_t gfp_mask); |
b23afb93 | 948 | |
bbec2e15 | 949 | unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg); |
7c5f64f8 | 950 | |
9783aa99 CD |
951 | unsigned long mem_cgroup_size(struct mem_cgroup *memcg); |
952 | ||
f0c867d9 | 953 | void mem_cgroup_print_oom_context(struct mem_cgroup *memcg, |
64219994 | 954 | struct task_struct *p); |
58ae83db | 955 | |
f0c867d9 | 956 | void mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg); |
957 | ||
3d8b38eb RG |
958 | struct mem_cgroup *mem_cgroup_get_oom_group(struct task_struct *victim, |
959 | struct mem_cgroup *oom_domain); | |
960 | void mem_cgroup_print_oom_group(struct mem_cgroup *memcg); | |
3812c8c8 | 961 | |
a94032b3 SB |
962 | void __mod_memcg_state(struct mem_cgroup *memcg, enum memcg_stat_item idx, |
963 | int val); | |
2a2e4885 | 964 | |
04fecbf5 | 965 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 966 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
a94032b3 | 967 | enum memcg_stat_item idx, int val) |
2a2e4885 | 968 | { |
c3cc3911 JW |
969 | unsigned long flags; |
970 | ||
971 | local_irq_save(flags); | |
a983b5eb | 972 | __mod_memcg_state(memcg, idx, val); |
c3cc3911 | 973 | local_irq_restore(flags); |
2a2e4885 JW |
974 | } |
975 | ||
4e5aa1f4 | 976 | static inline void mod_memcg_page_state(struct page *page, |
a94032b3 | 977 | enum memcg_stat_item idx, int val) |
4e5aa1f4 SB |
978 | { |
979 | struct mem_cgroup *memcg; | |
980 | ||
981 | if (mem_cgroup_disabled()) | |
982 | return; | |
983 | ||
984 | rcu_read_lock(); | |
ffc3c8a6 | 985 | memcg = folio_memcg(page_folio(page)); |
4e5aa1f4 SB |
986 | if (memcg) |
987 | mod_memcg_state(memcg, idx, val); | |
988 | rcu_read_unlock(); | |
989 | } | |
990 | ||
410f8e82 | 991 | unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx); |
70a64b79 SB |
992 | unsigned long lruvec_page_state(struct lruvec *lruvec, enum node_stat_item idx); |
993 | unsigned long lruvec_page_state_local(struct lruvec *lruvec, | |
994 | enum node_stat_item idx); | |
2a7106f2 | 995 | |
7d7ef0a4 YA |
996 | void mem_cgroup_flush_stats(struct mem_cgroup *memcg); |
997 | void mem_cgroup_flush_stats_ratelimited(struct mem_cgroup *memcg); | |
aa48e47e | 998 | |
da3ceeff | 999 | void __mod_lruvec_kmem_state(void *p, enum node_stat_item idx, int val); |
991e7673 | 1000 | |
da3ceeff | 1001 | static inline void mod_lruvec_kmem_state(void *p, enum node_stat_item idx, |
991e7673 SB |
1002 | int val) |
1003 | { | |
1004 | unsigned long flags; | |
1005 | ||
1006 | local_irq_save(flags); | |
da3ceeff | 1007 | __mod_lruvec_kmem_state(p, idx, val); |
991e7673 SB |
1008 | local_irq_restore(flags); |
1009 | } | |
1010 | ||
db9adbcb JW |
1011 | void __count_memcg_events(struct mem_cgroup *memcg, enum vm_event_item idx, |
1012 | unsigned long count); | |
c9019e9b | 1013 | |
2262185c | 1014 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
e27be240 JW |
1015 | enum vm_event_item idx, |
1016 | unsigned long count) | |
2262185c | 1017 | { |
c3cc3911 JW |
1018 | unsigned long flags; |
1019 | ||
1020 | local_irq_save(flags); | |
a983b5eb | 1021 | __count_memcg_events(memcg, idx, count); |
c3cc3911 | 1022 | local_irq_restore(flags); |
2262185c RG |
1023 | } |
1024 | ||
64daa5d8 MWO |
1025 | static inline void count_memcg_folio_events(struct folio *folio, |
1026 | enum vm_event_item idx, unsigned long nr) | |
1027 | { | |
1028 | struct mem_cgroup *memcg = folio_memcg(folio); | |
1029 | ||
1030 | if (memcg) | |
1031 | count_memcg_events(memcg, idx, nr); | |
1032 | } | |
1033 | ||
f77f0c75 KZ |
1034 | static inline void count_memcg_events_mm(struct mm_struct *mm, |
1035 | enum vm_event_item idx, unsigned long count) | |
68ae564b | 1036 | { |
33398cf2 MH |
1037 | struct mem_cgroup *memcg; |
1038 | ||
68ae564b DR |
1039 | if (mem_cgroup_disabled()) |
1040 | return; | |
33398cf2 MH |
1041 | |
1042 | rcu_read_lock(); | |
1043 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
fe6bdfc8 | 1044 | if (likely(memcg)) |
f77f0c75 | 1045 | count_memcg_events(memcg, idx, count); |
33398cf2 | 1046 | rcu_read_unlock(); |
68ae564b | 1047 | } |
c9019e9b | 1048 | |
f77f0c75 KZ |
1049 | static inline void count_memcg_event_mm(struct mm_struct *mm, |
1050 | enum vm_event_item idx) | |
1051 | { | |
1052 | count_memcg_events_mm(mm, idx, 1); | |
1053 | } | |
1054 | ||
e27be240 JW |
1055 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
1056 | enum memcg_memory_event event) | |
c9019e9b | 1057 | { |
8b21ca02 MS |
1058 | bool swap_event = event == MEMCG_SWAP_HIGH || event == MEMCG_SWAP_MAX || |
1059 | event == MEMCG_SWAP_FAIL; | |
1060 | ||
1e577f97 | 1061 | atomic_long_inc(&memcg->memory_events_local[event]); |
8b21ca02 MS |
1062 | if (!swap_event) |
1063 | cgroup_file_notify(&memcg->events_local_file); | |
1e577f97 | 1064 | |
9852ae3f CD |
1065 | do { |
1066 | atomic_long_inc(&memcg->memory_events[event]); | |
8b21ca02 MS |
1067 | if (swap_event) |
1068 | cgroup_file_notify(&memcg->swap_events_file); | |
1069 | else | |
1070 | cgroup_file_notify(&memcg->events_file); | |
9852ae3f | 1071 | |
04fd61a4 YS |
1072 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys)) |
1073 | break; | |
9852ae3f CD |
1074 | if (cgrp_dfl_root.flags & CGRP_ROOT_MEMORY_LOCAL_EVENTS) |
1075 | break; | |
1076 | } while ((memcg = parent_mem_cgroup(memcg)) && | |
1077 | !mem_cgroup_is_root(memcg)); | |
c9019e9b JW |
1078 | } |
1079 | ||
fe6bdfc8 RG |
1080 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
1081 | enum memcg_memory_event event) | |
1082 | { | |
1083 | struct mem_cgroup *memcg; | |
1084 | ||
1085 | if (mem_cgroup_disabled()) | |
1086 | return; | |
1087 | ||
1088 | rcu_read_lock(); | |
1089 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
1090 | if (likely(memcg)) | |
1091 | memcg_memory_event(memcg, event); | |
1092 | rcu_read_unlock(); | |
1093 | } | |
1094 | ||
b8791381 | 1095 | void split_page_memcg(struct page *head, int old_order, int new_order); |
ca3e0214 | 1096 | |
c255a458 | 1097 | #else /* CONFIG_MEMCG */ |
23047a96 JW |
1098 | |
1099 | #define MEM_CGROUP_ID_SHIFT 0 | |
23047a96 | 1100 | |
1b7e4464 MWO |
1101 | static inline struct mem_cgroup *folio_memcg(struct folio *folio) |
1102 | { | |
1103 | return NULL; | |
1104 | } | |
1105 | ||
c5ce619a | 1106 | static inline struct mem_cgroup *folio_memcg_rcu(struct folio *folio) |
bcfe06bf RG |
1107 | { |
1108 | WARN_ON_ONCE(!rcu_read_lock_held()); | |
1109 | return NULL; | |
1110 | } | |
1111 | ||
becacb04 MW |
1112 | static inline struct mem_cgroup *folio_memcg_check(struct folio *folio) |
1113 | { | |
1114 | return NULL; | |
1115 | } | |
1116 | ||
bcfe06bf RG |
1117 | static inline struct mem_cgroup *page_memcg_check(struct page *page) |
1118 | { | |
1119 | return NULL; | |
1120 | } | |
1121 | ||
a65b0e76 DC |
1122 | static inline struct mem_cgroup *get_mem_cgroup_from_objcg(struct obj_cgroup *objcg) |
1123 | { | |
1124 | return NULL; | |
1125 | } | |
1126 | ||
1b7e4464 MWO |
1127 | static inline bool folio_memcg_kmem(struct folio *folio) |
1128 | { | |
1129 | return false; | |
1130 | } | |
1131 | ||
18b2db3b RG |
1132 | static inline bool PageMemcgKmem(struct page *page) |
1133 | { | |
1134 | return false; | |
1135 | } | |
1136 | ||
dfd2f10c KT |
1137 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
1138 | { | |
1139 | return true; | |
1140 | } | |
1141 | ||
23047a96 JW |
1142 | static inline bool mem_cgroup_disabled(void) |
1143 | { | |
1144 | return true; | |
1145 | } | |
1146 | ||
e27be240 JW |
1147 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
1148 | enum memcg_memory_event event) | |
241994ed JW |
1149 | { |
1150 | } | |
1151 | ||
fe6bdfc8 RG |
1152 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
1153 | enum memcg_memory_event event) | |
1154 | { | |
1155 | } | |
1156 | ||
f56ce412 JW |
1157 | static inline void mem_cgroup_protection(struct mem_cgroup *root, |
1158 | struct mem_cgroup *memcg, | |
1159 | unsigned long *min, | |
1160 | unsigned long *low) | |
9783aa99 | 1161 | { |
f56ce412 | 1162 | *min = *low = 0; |
9783aa99 CD |
1163 | } |
1164 | ||
45c7f7e1 CD |
1165 | static inline void mem_cgroup_calculate_protection(struct mem_cgroup *root, |
1166 | struct mem_cgroup *memcg) | |
1167 | { | |
1168 | } | |
1169 | ||
adb82130 YA |
1170 | static inline bool mem_cgroup_unprotected(struct mem_cgroup *target, |
1171 | struct mem_cgroup *memcg) | |
1172 | { | |
1173 | return true; | |
1174 | } | |
1175 | static inline bool mem_cgroup_below_low(struct mem_cgroup *target, | |
1176 | struct mem_cgroup *memcg) | |
45c7f7e1 CD |
1177 | { |
1178 | return false; | |
1179 | } | |
1180 | ||
adb82130 YA |
1181 | static inline bool mem_cgroup_below_min(struct mem_cgroup *target, |
1182 | struct mem_cgroup *memcg) | |
241994ed | 1183 | { |
45c7f7e1 | 1184 | return false; |
241994ed JW |
1185 | } |
1186 | ||
4b569387 NP |
1187 | static inline void mem_cgroup_commit_charge(struct folio *folio, |
1188 | struct mem_cgroup *memcg) | |
1189 | { | |
1190 | } | |
1191 | ||
8f425e4e MWO |
1192 | static inline int mem_cgroup_charge(struct folio *folio, |
1193 | struct mm_struct *mm, gfp_t gfp) | |
3fea5a49 JW |
1194 | { |
1195 | return 0; | |
1196 | } | |
1197 | ||
8cba9576 NP |
1198 | static inline int mem_cgroup_hugetlb_try_charge(struct mem_cgroup *memcg, |
1199 | gfp_t gfp, long nr_pages) | |
1200 | { | |
1201 | return 0; | |
1202 | } | |
1203 | ||
65995918 | 1204 | static inline int mem_cgroup_swapin_charge_folio(struct folio *folio, |
0add0c77 SB |
1205 | struct mm_struct *mm, gfp_t gfp, swp_entry_t entry) |
1206 | { | |
1207 | return 0; | |
1208 | } | |
1209 | ||
325efb16 | 1210 | static inline void mem_cgroup_swapin_uncharge_swap(swp_entry_t entry, unsigned int nr) |
0add0c77 SB |
1211 | { |
1212 | } | |
1213 | ||
bbc6b703 | 1214 | static inline void mem_cgroup_uncharge(struct folio *folio) |
569b846d KH |
1215 | { |
1216 | } | |
1217 | ||
4882c809 MWO |
1218 | static inline void mem_cgroup_uncharge_folios(struct folio_batch *folios) |
1219 | { | |
1220 | } | |
1221 | ||
4b569387 NP |
1222 | static inline void mem_cgroup_cancel_charge(struct mem_cgroup *memcg, |
1223 | unsigned int nr_pages) | |
1224 | { | |
1225 | } | |
1226 | ||
85ce2c51 NP |
1227 | static inline void mem_cgroup_replace_folio(struct folio *old, |
1228 | struct folio *new) | |
1229 | { | |
1230 | } | |
1231 | ||
d21bba2b | 1232 | static inline void mem_cgroup_migrate(struct folio *old, struct folio *new) |
69029cd5 KH |
1233 | { |
1234 | } | |
1235 | ||
867e5e1d JW |
1236 | static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg, |
1237 | struct pglist_data *pgdat) | |
08e552c6 | 1238 | { |
867e5e1d | 1239 | return &pgdat->__lruvec; |
08e552c6 KH |
1240 | } |
1241 | ||
b1baabd9 | 1242 | static inline struct lruvec *folio_lruvec(struct folio *folio) |
66e1707b | 1243 | { |
b1baabd9 | 1244 | struct pglist_data *pgdat = folio_pgdat(folio); |
867e5e1d | 1245 | return &pgdat->__lruvec; |
66e1707b BS |
1246 | } |
1247 | ||
e809c3fe MWO |
1248 | static inline |
1249 | void lruvec_memcg_debug(struct lruvec *lruvec, struct folio *folio) | |
2d146aa3 JW |
1250 | { |
1251 | } | |
1252 | ||
b910718a JW |
1253 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) |
1254 | { | |
1255 | return NULL; | |
1256 | } | |
1257 | ||
587af308 | 1258 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
c0ff4b85 | 1259 | struct mem_cgroup *memcg) |
bed7161a | 1260 | { |
587af308 | 1261 | return true; |
bed7161a BS |
1262 | } |
1263 | ||
d46eb14b SB |
1264 | static inline struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm) |
1265 | { | |
1266 | return NULL; | |
1267 | } | |
1268 | ||
4b569387 NP |
1269 | static inline struct mem_cgroup *get_mem_cgroup_from_current(void) |
1270 | { | |
1271 | return NULL; | |
1272 | } | |
1273 | ||
f77f0c75 KZ |
1274 | static inline struct mem_cgroup *get_mem_cgroup_from_folio(struct folio *folio) |
1275 | { | |
1276 | return NULL; | |
1277 | } | |
1278 | ||
c74d40e8 DS |
1279 | static inline |
1280 | struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css) | |
1281 | { | |
1282 | return NULL; | |
1283 | } | |
1284 | ||
f4840ccf JW |
1285 | static inline void obj_cgroup_put(struct obj_cgroup *objcg) |
1286 | { | |
1287 | } | |
1288 | ||
e4dde56c YZ |
1289 | static inline bool mem_cgroup_tryget(struct mem_cgroup *memcg) |
1290 | { | |
1291 | return true; | |
1292 | } | |
1293 | ||
fdc4161f NP |
1294 | static inline bool mem_cgroup_tryget_online(struct mem_cgroup *memcg) |
1295 | { | |
1296 | return true; | |
1297 | } | |
1298 | ||
dc0b5864 RG |
1299 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
1300 | { | |
1301 | } | |
1302 | ||
e809c3fe | 1303 | static inline struct lruvec *folio_lruvec_lock(struct folio *folio) |
6168d0da | 1304 | { |
e809c3fe | 1305 | struct pglist_data *pgdat = folio_pgdat(folio); |
6168d0da AS |
1306 | |
1307 | spin_lock(&pgdat->__lruvec.lru_lock); | |
1308 | return &pgdat->__lruvec; | |
1309 | } | |
1310 | ||
e809c3fe | 1311 | static inline struct lruvec *folio_lruvec_lock_irq(struct folio *folio) |
6168d0da | 1312 | { |
e809c3fe | 1313 | struct pglist_data *pgdat = folio_pgdat(folio); |
6168d0da AS |
1314 | |
1315 | spin_lock_irq(&pgdat->__lruvec.lru_lock); | |
1316 | return &pgdat->__lruvec; | |
1317 | } | |
1318 | ||
e809c3fe | 1319 | static inline struct lruvec *folio_lruvec_lock_irqsave(struct folio *folio, |
6168d0da AS |
1320 | unsigned long *flagsp) |
1321 | { | |
e809c3fe | 1322 | struct pglist_data *pgdat = folio_pgdat(folio); |
6168d0da AS |
1323 | |
1324 | spin_lock_irqsave(&pgdat->__lruvec.lru_lock, *flagsp); | |
1325 | return &pgdat->__lruvec; | |
1326 | } | |
1327 | ||
5660048c JW |
1328 | static inline struct mem_cgroup * |
1329 | mem_cgroup_iter(struct mem_cgroup *root, | |
1330 | struct mem_cgroup *prev, | |
1331 | struct mem_cgroup_reclaim_cookie *reclaim) | |
1332 | { | |
1333 | return NULL; | |
1334 | } | |
1335 | ||
1336 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
1337 | struct mem_cgroup *prev) | |
1338 | { | |
1339 | } | |
1340 | ||
025b7799 | 1341 | static inline void mem_cgroup_scan_tasks(struct mem_cgroup *memcg, |
7c5f64f8 VD |
1342 | int (*fn)(struct task_struct *, void *), void *arg) |
1343 | { | |
7c5f64f8 VD |
1344 | } |
1345 | ||
23047a96 | 1346 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
f8d66542 | 1347 | { |
23047a96 JW |
1348 | return 0; |
1349 | } | |
1350 | ||
1351 | static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id) | |
1352 | { | |
1353 | WARN_ON_ONCE(id); | |
1354 | /* XXX: This should always return root_mem_cgroup */ | |
1355 | return NULL; | |
f8d66542 | 1356 | } |
a636b327 | 1357 | |
c15187a4 RG |
1358 | #ifdef CONFIG_SHRINKER_DEBUG |
1359 | static inline unsigned long mem_cgroup_ino(struct mem_cgroup *memcg) | |
1360 | { | |
1361 | return 0; | |
1362 | } | |
1363 | ||
1364 | static inline struct mem_cgroup *mem_cgroup_get_from_ino(unsigned long ino) | |
1365 | { | |
1366 | return NULL; | |
1367 | } | |
1368 | #endif | |
1369 | ||
aa9694bb CD |
1370 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
1371 | { | |
1372 | return NULL; | |
1373 | } | |
1374 | ||
2262185c RG |
1375 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
1376 | { | |
1377 | return NULL; | |
1378 | } | |
1379 | ||
eb01aaab | 1380 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
14797e23 | 1381 | { |
13308ca9 | 1382 | return true; |
14797e23 KM |
1383 | } |
1384 | ||
b4536f0c MH |
1385 | static inline |
1386 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
1387 | enum lru_list lru, int zone_idx) | |
1388 | { | |
1389 | return 0; | |
1390 | } | |
a3d8e054 | 1391 | |
bbec2e15 | 1392 | static inline unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg) |
7c5f64f8 VD |
1393 | { |
1394 | return 0; | |
1395 | } | |
1396 | ||
9783aa99 CD |
1397 | static inline unsigned long mem_cgroup_size(struct mem_cgroup *memcg) |
1398 | { | |
1399 | return 0; | |
1400 | } | |
1401 | ||
e222432b | 1402 | static inline void |
f0c867d9 | 1403 | mem_cgroup_print_oom_context(struct mem_cgroup *memcg, struct task_struct *p) |
1404 | { | |
1405 | } | |
1406 | ||
1407 | static inline void | |
1408 | mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg) | |
e222432b BS |
1409 | { |
1410 | } | |
1411 | ||
9ea9cb00 | 1412 | static inline void mem_cgroup_handle_over_high(gfp_t gfp_mask) |
b23afb93 TH |
1413 | { |
1414 | } | |
1415 | ||
3d8b38eb RG |
1416 | static inline struct mem_cgroup *mem_cgroup_get_oom_group( |
1417 | struct task_struct *victim, struct mem_cgroup *oom_domain) | |
1418 | { | |
1419 | return NULL; | |
1420 | } | |
1421 | ||
1422 | static inline void mem_cgroup_print_oom_group(struct mem_cgroup *memcg) | |
1423 | { | |
1424 | } | |
1425 | ||
00f3ca2c | 1426 | static inline void __mod_memcg_state(struct mem_cgroup *memcg, |
a94032b3 | 1427 | enum memcg_stat_item idx, |
00f3ca2c | 1428 | int nr) |
2a2e4885 JW |
1429 | { |
1430 | } | |
1431 | ||
00f3ca2c | 1432 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
a94032b3 | 1433 | enum memcg_stat_item idx, |
00f3ca2c | 1434 | int nr) |
2a2e4885 JW |
1435 | { |
1436 | } | |
1437 | ||
4e5aa1f4 | 1438 | static inline void mod_memcg_page_state(struct page *page, |
a94032b3 | 1439 | enum memcg_stat_item idx, int val) |
4e5aa1f4 SB |
1440 | { |
1441 | } | |
1442 | ||
7490a2d2 SB |
1443 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx) |
1444 | { | |
1445 | return 0; | |
1446 | } | |
1447 | ||
42a30035 JW |
1448 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
1449 | enum node_stat_item idx) | |
1450 | { | |
1451 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
1452 | } | |
1453 | ||
205b20cc JW |
1454 | static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
1455 | enum node_stat_item idx) | |
2a7106f2 | 1456 | { |
00f3ca2c | 1457 | return node_page_state(lruvec_pgdat(lruvec), idx); |
2a7106f2 GT |
1458 | } |
1459 | ||
7d7ef0a4 | 1460 | static inline void mem_cgroup_flush_stats(struct mem_cgroup *memcg) |
aa48e47e SB |
1461 | { |
1462 | } | |
1463 | ||
7d7ef0a4 | 1464 | static inline void mem_cgroup_flush_stats_ratelimited(struct mem_cgroup *memcg) |
9b301615 SB |
1465 | { |
1466 | } | |
1467 | ||
da3ceeff | 1468 | static inline void __mod_lruvec_kmem_state(void *p, enum node_stat_item idx, |
ec9f0238 RG |
1469 | int val) |
1470 | { | |
1471 | struct page *page = virt_to_head_page(p); | |
1472 | ||
1473 | __mod_node_page_state(page_pgdat(page), idx, val); | |
1474 | } | |
1475 | ||
da3ceeff | 1476 | static inline void mod_lruvec_kmem_state(void *p, enum node_stat_item idx, |
991e7673 SB |
1477 | int val) |
1478 | { | |
1479 | struct page *page = virt_to_head_page(p); | |
1480 | ||
1481 | mod_node_page_state(page_pgdat(page), idx, val); | |
1482 | } | |
1483 | ||
2262185c RG |
1484 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
1485 | enum vm_event_item idx, | |
1486 | unsigned long count) | |
1487 | { | |
1488 | } | |
1489 | ||
9851ac13 KT |
1490 | static inline void __count_memcg_events(struct mem_cgroup *memcg, |
1491 | enum vm_event_item idx, | |
1492 | unsigned long count) | |
1493 | { | |
1494 | } | |
1495 | ||
64daa5d8 MWO |
1496 | static inline void count_memcg_folio_events(struct folio *folio, |
1497 | enum vm_event_item idx, unsigned long nr) | |
1498 | { | |
1499 | } | |
1500 | ||
f77f0c75 KZ |
1501 | static inline void count_memcg_events_mm(struct mm_struct *mm, |
1502 | enum vm_event_item idx, unsigned long count) | |
1503 | { | |
1504 | } | |
1505 | ||
456f998e | 1506 | static inline |
2262185c | 1507 | void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx) |
456f998e YH |
1508 | { |
1509 | } | |
6168d0da | 1510 | |
b8791381 | 1511 | static inline void split_page_memcg(struct page *head, int old_order, int new_order) |
2d146aa3 JW |
1512 | { |
1513 | } | |
c255a458 | 1514 | #endif /* CONFIG_MEMCG */ |
78fb7466 | 1515 | |
21c690a3 SB |
1516 | /* |
1517 | * Extended information for slab objects stored as an array in page->memcg_data | |
1518 | * if MEMCG_DATA_OBJEXTS is set. | |
1519 | */ | |
1520 | struct slabobj_ext { | |
3a3b7fec | 1521 | #ifdef CONFIG_MEMCG |
21c690a3 | 1522 | struct obj_cgroup *objcg; |
c789b5fe SB |
1523 | #endif |
1524 | #ifdef CONFIG_MEM_ALLOC_PROFILING | |
1525 | union codetag_ref ref; | |
1526 | #endif | |
21c690a3 SB |
1527 | } __aligned(8); |
1528 | ||
da3ceeff | 1529 | static inline void __inc_lruvec_kmem_state(void *p, enum node_stat_item idx) |
ec9f0238 | 1530 | { |
da3ceeff | 1531 | __mod_lruvec_kmem_state(p, idx, 1); |
ec9f0238 RG |
1532 | } |
1533 | ||
da3ceeff | 1534 | static inline void __dec_lruvec_kmem_state(void *p, enum node_stat_item idx) |
ec9f0238 | 1535 | { |
da3ceeff | 1536 | __mod_lruvec_kmem_state(p, idx, -1); |
ec9f0238 RG |
1537 | } |
1538 | ||
7cf111bc JW |
1539 | static inline struct lruvec *parent_lruvec(struct lruvec *lruvec) |
1540 | { | |
1541 | struct mem_cgroup *memcg; | |
1542 | ||
1543 | memcg = lruvec_memcg(lruvec); | |
1544 | if (!memcg) | |
1545 | return NULL; | |
1546 | memcg = parent_mem_cgroup(memcg); | |
1547 | if (!memcg) | |
1548 | return NULL; | |
1549 | return mem_cgroup_lruvec(memcg, lruvec_pgdat(lruvec)); | |
1550 | } | |
1551 | ||
6168d0da AS |
1552 | static inline void unlock_page_lruvec(struct lruvec *lruvec) |
1553 | { | |
1554 | spin_unlock(&lruvec->lru_lock); | |
1555 | } | |
1556 | ||
1557 | static inline void unlock_page_lruvec_irq(struct lruvec *lruvec) | |
1558 | { | |
1559 | spin_unlock_irq(&lruvec->lru_lock); | |
1560 | } | |
1561 | ||
1562 | static inline void unlock_page_lruvec_irqrestore(struct lruvec *lruvec, | |
1563 | unsigned long flags) | |
1564 | { | |
1565 | spin_unlock_irqrestore(&lruvec->lru_lock, flags); | |
1566 | } | |
1567 | ||
ffc3c8a6 | 1568 | /* Test requires a stable folio->memcg binding, see folio_memcg() */ |
0de340cb MWO |
1569 | static inline bool folio_matches_lruvec(struct folio *folio, |
1570 | struct lruvec *lruvec) | |
f2e4d28d | 1571 | { |
0de340cb MWO |
1572 | return lruvec_pgdat(lruvec) == folio_pgdat(folio) && |
1573 | lruvec_memcg(lruvec) == folio_memcg(folio); | |
f2e4d28d MS |
1574 | } |
1575 | ||
2a5e4e34 | 1576 | /* Don't lock again iff page's lruvec locked */ |
0de340cb | 1577 | static inline struct lruvec *folio_lruvec_relock_irq(struct folio *folio, |
2a5e4e34 AD |
1578 | struct lruvec *locked_lruvec) |
1579 | { | |
1580 | if (locked_lruvec) { | |
0de340cb | 1581 | if (folio_matches_lruvec(folio, locked_lruvec)) |
2a5e4e34 AD |
1582 | return locked_lruvec; |
1583 | ||
1584 | unlock_page_lruvec_irq(locked_lruvec); | |
1585 | } | |
1586 | ||
e809c3fe | 1587 | return folio_lruvec_lock_irq(folio); |
2a5e4e34 AD |
1588 | } |
1589 | ||
f1ee018b MWO |
1590 | /* Don't lock again iff folio's lruvec locked */ |
1591 | static inline void folio_lruvec_relock_irqsave(struct folio *folio, | |
1592 | struct lruvec **lruvecp, unsigned long *flags) | |
2a5e4e34 | 1593 | { |
f1ee018b MWO |
1594 | if (*lruvecp) { |
1595 | if (folio_matches_lruvec(folio, *lruvecp)) | |
1596 | return; | |
2a5e4e34 | 1597 | |
f1ee018b | 1598 | unlock_page_lruvec_irqrestore(*lruvecp, *flags); |
2a5e4e34 AD |
1599 | } |
1600 | ||
f1ee018b | 1601 | *lruvecp = folio_lruvec_lock_irqsave(folio, flags); |
2a5e4e34 AD |
1602 | } |
1603 | ||
52ebea74 | 1604 | #ifdef CONFIG_CGROUP_WRITEBACK |
841710aa | 1605 | |
841710aa | 1606 | struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb); |
c5edf9cd TH |
1607 | void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages, |
1608 | unsigned long *pheadroom, unsigned long *pdirty, | |
1609 | unsigned long *pwriteback); | |
841710aa | 1610 | |
9d8053fc | 1611 | void mem_cgroup_track_foreign_dirty_slowpath(struct folio *folio, |
97b27821 TH |
1612 | struct bdi_writeback *wb); |
1613 | ||
203a3151 | 1614 | static inline void mem_cgroup_track_foreign_dirty(struct folio *folio, |
97b27821 TH |
1615 | struct bdi_writeback *wb) |
1616 | { | |
ac86f547 KW |
1617 | struct mem_cgroup *memcg; |
1618 | ||
08d1d0e6 BH |
1619 | if (mem_cgroup_disabled()) |
1620 | return; | |
1621 | ||
ac86f547 KW |
1622 | memcg = folio_memcg(folio); |
1623 | if (unlikely(memcg && &memcg->css != wb->memcg_css)) | |
9d8053fc | 1624 | mem_cgroup_track_foreign_dirty_slowpath(folio, wb); |
97b27821 TH |
1625 | } |
1626 | ||
1627 | void mem_cgroup_flush_foreign(struct bdi_writeback *wb); | |
1628 | ||
841710aa TH |
1629 | #else /* CONFIG_CGROUP_WRITEBACK */ |
1630 | ||
1631 | static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb) | |
1632 | { | |
1633 | return NULL; | |
1634 | } | |
1635 | ||
c2aa723a | 1636 | static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb, |
c5edf9cd TH |
1637 | unsigned long *pfilepages, |
1638 | unsigned long *pheadroom, | |
c2aa723a TH |
1639 | unsigned long *pdirty, |
1640 | unsigned long *pwriteback) | |
1641 | { | |
1642 | } | |
1643 | ||
203a3151 | 1644 | static inline void mem_cgroup_track_foreign_dirty(struct folio *folio, |
97b27821 TH |
1645 | struct bdi_writeback *wb) |
1646 | { | |
1647 | } | |
1648 | ||
1649 | static inline void mem_cgroup_flush_foreign(struct bdi_writeback *wb) | |
1650 | { | |
1651 | } | |
1652 | ||
841710aa | 1653 | #endif /* CONFIG_CGROUP_WRITEBACK */ |
52ebea74 | 1654 | |
e1aab161 | 1655 | struct sock; |
4b1327be WW |
1656 | bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages, |
1657 | gfp_t gfp_mask); | |
baac50bb | 1658 | void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); |
d886f4e4 | 1659 | #ifdef CONFIG_MEMCG |
ef12947c JW |
1660 | extern struct static_key_false memcg_sockets_enabled_key; |
1661 | #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key) | |
2d758073 JW |
1662 | void mem_cgroup_sk_alloc(struct sock *sk); |
1663 | void mem_cgroup_sk_free(struct sock *sk); | |
baac50bb | 1664 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c | 1665 | { |
773e9ae7 | 1666 | #ifdef CONFIG_MEMCG_V1 |
ac8a5296 AW |
1667 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys)) |
1668 | return !!memcg->tcpmem_pressure; | |
773e9ae7 | 1669 | #endif /* CONFIG_MEMCG_V1 */ |
8e8ae645 | 1670 | do { |
7e6ec49c | 1671 | if (time_before(jiffies, READ_ONCE(memcg->socket_pressure))) |
8e8ae645 JW |
1672 | return true; |
1673 | } while ((memcg = parent_mem_cgroup(memcg))); | |
1674 | return false; | |
e805605c | 1675 | } |
0a432dcb | 1676 | |
e4262c4f YS |
1677 | int alloc_shrinker_info(struct mem_cgroup *memcg); |
1678 | void free_shrinker_info(struct mem_cgroup *memcg); | |
2bfd3637 | 1679 | void set_shrinker_bit(struct mem_cgroup *memcg, int nid, int shrinker_id); |
a178015c | 1680 | void reparent_shrinker_deferred(struct mem_cgroup *memcg); |
e805605c | 1681 | #else |
80e95fe0 | 1682 | #define mem_cgroup_sockets_enabled 0 |
2d758073 JW |
1683 | static inline void mem_cgroup_sk_alloc(struct sock *sk) { }; |
1684 | static inline void mem_cgroup_sk_free(struct sock *sk) { }; | |
baac50bb | 1685 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c JW |
1686 | { |
1687 | return false; | |
1688 | } | |
0a432dcb | 1689 | |
2bfd3637 YS |
1690 | static inline void set_shrinker_bit(struct mem_cgroup *memcg, |
1691 | int nid, int shrinker_id) | |
0a432dcb YS |
1692 | { |
1693 | } | |
e805605c | 1694 | #endif |
7ae1e1d0 | 1695 | |
3a3b7fec | 1696 | #ifdef CONFIG_MEMCG |
4d5c8aed | 1697 | bool mem_cgroup_kmem_disabled(void); |
f4b00eab RG |
1698 | int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, int order); |
1699 | void __memcg_kmem_uncharge_page(struct page *page, int order); | |
45264778 | 1700 | |
e86828e5 RG |
1701 | /* |
1702 | * The returned objcg pointer is safe to use without additional | |
1703 | * protection within a scope. The scope is defined either by | |
1704 | * the current task (similar to the "current" global variable) | |
1705 | * or by set_active_memcg() pair. | |
1706 | * Please, use obj_cgroup_get() to get a reference if the pointer | |
1707 | * needs to be used outside of the local scope. | |
1708 | */ | |
1709 | struct obj_cgroup *current_obj_cgroup(void); | |
074e3e26 | 1710 | struct obj_cgroup *get_obj_cgroup_from_folio(struct folio *folio); |
bf4f0599 | 1711 | |
e56808fe RG |
1712 | static inline struct obj_cgroup *get_obj_cgroup_from_current(void) |
1713 | { | |
1714 | struct obj_cgroup *objcg = current_obj_cgroup(); | |
1715 | ||
1716 | if (objcg) | |
1717 | obj_cgroup_get(objcg); | |
1718 | ||
1719 | return objcg; | |
1720 | } | |
1721 | ||
bf4f0599 RG |
1722 | int obj_cgroup_charge(struct obj_cgroup *objcg, gfp_t gfp, size_t size); |
1723 | void obj_cgroup_uncharge(struct obj_cgroup *objcg, size_t size); | |
1724 | ||
b6c1a8af YS |
1725 | extern struct static_key_false memcg_bpf_enabled_key; |
1726 | static inline bool memcg_bpf_enabled(void) | |
1727 | { | |
1728 | return static_branch_likely(&memcg_bpf_enabled_key); | |
1729 | } | |
1730 | ||
f7a449f7 | 1731 | extern struct static_key_false memcg_kmem_online_key; |
749c5415 | 1732 | |
f7a449f7 | 1733 | static inline bool memcg_kmem_online(void) |
7ae1e1d0 | 1734 | { |
f7a449f7 | 1735 | return static_branch_likely(&memcg_kmem_online_key); |
7ae1e1d0 GC |
1736 | } |
1737 | ||
f4b00eab RG |
1738 | static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1739 | int order) | |
60cd4bcd | 1740 | { |
f7a449f7 | 1741 | if (memcg_kmem_online()) |
f4b00eab | 1742 | return __memcg_kmem_charge_page(page, gfp, order); |
60cd4bcd SB |
1743 | return 0; |
1744 | } | |
1745 | ||
f4b00eab | 1746 | static inline void memcg_kmem_uncharge_page(struct page *page, int order) |
60cd4bcd | 1747 | { |
f7a449f7 | 1748 | if (memcg_kmem_online()) |
f4b00eab | 1749 | __memcg_kmem_uncharge_page(page, order); |
60cd4bcd SB |
1750 | } |
1751 | ||
33398cf2 | 1752 | /* |
a7cb874b RG |
1753 | * A helper for accessing memcg's kmem_id, used for getting |
1754 | * corresponding LRU lists. | |
33398cf2 | 1755 | */ |
7c52f65d | 1756 | static inline int memcg_kmem_id(struct mem_cgroup *memcg) |
33398cf2 MH |
1757 | { |
1758 | return memcg ? memcg->kmemcg_id : -1; | |
1759 | } | |
5722d094 | 1760 | |
fc4db90f | 1761 | struct mem_cgroup *mem_cgroup_from_slab_obj(void *p); |
8380ce47 | 1762 | |
f4840ccf JW |
1763 | static inline void count_objcg_event(struct obj_cgroup *objcg, |
1764 | enum vm_event_item idx) | |
1765 | { | |
1766 | struct mem_cgroup *memcg; | |
1767 | ||
f7a449f7 | 1768 | if (!memcg_kmem_online()) |
f4840ccf JW |
1769 | return; |
1770 | ||
1771 | rcu_read_lock(); | |
1772 | memcg = obj_cgroup_memcg(objcg); | |
1773 | count_memcg_events(memcg, idx, 1); | |
1774 | rcu_read_unlock(); | |
1775 | } | |
1776 | ||
7ae1e1d0 | 1777 | #else |
4d5c8aed RG |
1778 | static inline bool mem_cgroup_kmem_disabled(void) |
1779 | { | |
1780 | return true; | |
1781 | } | |
9b6f7e16 | 1782 | |
f4b00eab RG |
1783 | static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1784 | int order) | |
9b6f7e16 RG |
1785 | { |
1786 | return 0; | |
1787 | } | |
1788 | ||
f4b00eab | 1789 | static inline void memcg_kmem_uncharge_page(struct page *page, int order) |
9b6f7e16 RG |
1790 | { |
1791 | } | |
1792 | ||
f4b00eab RG |
1793 | static inline int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1794 | int order) | |
60cd4bcd SB |
1795 | { |
1796 | return 0; | |
1797 | } | |
1798 | ||
f4b00eab | 1799 | static inline void __memcg_kmem_uncharge_page(struct page *page, int order) |
60cd4bcd SB |
1800 | { |
1801 | } | |
1802 | ||
074e3e26 | 1803 | static inline struct obj_cgroup *get_obj_cgroup_from_folio(struct folio *folio) |
f4840ccf JW |
1804 | { |
1805 | return NULL; | |
1806 | } | |
1807 | ||
b6c1a8af YS |
1808 | static inline bool memcg_bpf_enabled(void) |
1809 | { | |
1810 | return false; | |
1811 | } | |
1812 | ||
f7a449f7 | 1813 | static inline bool memcg_kmem_online(void) |
b9ce5ef4 GC |
1814 | { |
1815 | return false; | |
1816 | } | |
1817 | ||
7c52f65d | 1818 | static inline int memcg_kmem_id(struct mem_cgroup *memcg) |
2633d7a0 GC |
1819 | { |
1820 | return -1; | |
1821 | } | |
1822 | ||
fc4db90f RG |
1823 | static inline struct mem_cgroup *mem_cgroup_from_slab_obj(void *p) |
1824 | { | |
1825 | return NULL; | |
1826 | } | |
1827 | ||
f4840ccf JW |
1828 | static inline void count_objcg_event(struct obj_cgroup *objcg, |
1829 | enum vm_event_item idx) | |
1830 | { | |
1831 | } | |
1832 | ||
3a3b7fec | 1833 | #endif /* CONFIG_MEMCG */ |
127424c8 | 1834 | |
3a3b7fec | 1835 | #if defined(CONFIG_MEMCG) && defined(CONFIG_ZSWAP) |
f4840ccf JW |
1836 | bool obj_cgroup_may_zswap(struct obj_cgroup *objcg); |
1837 | void obj_cgroup_charge_zswap(struct obj_cgroup *objcg, size_t size); | |
1838 | void obj_cgroup_uncharge_zswap(struct obj_cgroup *objcg, size_t size); | |
501a06fe | 1839 | bool mem_cgroup_zswap_writeback_enabled(struct mem_cgroup *memcg); |
f4840ccf JW |
1840 | #else |
1841 | static inline bool obj_cgroup_may_zswap(struct obj_cgroup *objcg) | |
1842 | { | |
1843 | return true; | |
1844 | } | |
1845 | static inline void obj_cgroup_charge_zswap(struct obj_cgroup *objcg, | |
1846 | size_t size) | |
1847 | { | |
1848 | } | |
1849 | static inline void obj_cgroup_uncharge_zswap(struct obj_cgroup *objcg, | |
1850 | size_t size) | |
1851 | { | |
1852 | } | |
501a06fe NP |
1853 | static inline bool mem_cgroup_zswap_writeback_enabled(struct mem_cgroup *memcg) |
1854 | { | |
1855 | /* if zswap is disabled, do not block pages going to the swapping device */ | |
1856 | return true; | |
1857 | } | |
f4840ccf JW |
1858 | #endif |
1859 | ||
6f1173d6 RG |
1860 | |
1861 | /* Cgroup v1-related declarations */ | |
1862 | ||
e93d4166 | 1863 | #ifdef CONFIG_MEMCG_V1 |
6f1173d6 RG |
1864 | unsigned long memcg1_soft_limit_reclaim(pg_data_t *pgdat, int order, |
1865 | gfp_t gfp_mask, | |
1866 | unsigned long *total_scanned); | |
1867 | ||
1868 | bool mem_cgroup_oom_synchronize(bool wait); | |
1869 | ||
1870 | static inline bool task_in_memcg_oom(struct task_struct *p) | |
1871 | { | |
1872 | return p->memcg_in_oom; | |
1873 | } | |
1874 | ||
1875 | void folio_memcg_lock(struct folio *folio); | |
1876 | void folio_memcg_unlock(struct folio *folio); | |
1877 | ||
1878 | /* try to stablize folio_memcg() for all the pages in a memcg */ | |
1879 | static inline bool mem_cgroup_trylock_pages(struct mem_cgroup *memcg) | |
1880 | { | |
1881 | rcu_read_lock(); | |
1882 | ||
1883 | if (mem_cgroup_disabled() || !atomic_read(&memcg->moving_account)) | |
1884 | return true; | |
1885 | ||
1886 | rcu_read_unlock(); | |
1887 | return false; | |
1888 | } | |
1889 | ||
1890 | static inline void mem_cgroup_unlock_pages(void) | |
1891 | { | |
1892 | rcu_read_unlock(); | |
1893 | } | |
1894 | ||
1419ff98 RG |
1895 | static inline void mem_cgroup_enter_user_fault(void) |
1896 | { | |
1897 | WARN_ON(current->in_user_fault); | |
1898 | current->in_user_fault = 1; | |
1899 | } | |
1900 | ||
1901 | static inline void mem_cgroup_exit_user_fault(void) | |
1902 | { | |
1903 | WARN_ON(!current->in_user_fault); | |
1904 | current->in_user_fault = 0; | |
1905 | } | |
1906 | ||
e93d4166 | 1907 | #else /* CONFIG_MEMCG_V1 */ |
6f1173d6 RG |
1908 | static inline |
1909 | unsigned long memcg1_soft_limit_reclaim(pg_data_t *pgdat, int order, | |
1910 | gfp_t gfp_mask, | |
1911 | unsigned long *total_scanned) | |
1912 | { | |
1913 | return 0; | |
1914 | } | |
1915 | ||
1916 | static inline void folio_memcg_lock(struct folio *folio) | |
1917 | { | |
1918 | } | |
1919 | ||
1920 | static inline void folio_memcg_unlock(struct folio *folio) | |
1921 | { | |
1922 | } | |
1923 | ||
1924 | static inline bool mem_cgroup_trylock_pages(struct mem_cgroup *memcg) | |
1925 | { | |
1926 | /* to match folio_memcg_rcu() */ | |
1927 | rcu_read_lock(); | |
1928 | return true; | |
1929 | } | |
1930 | ||
1931 | static inline void mem_cgroup_unlock_pages(void) | |
1932 | { | |
1933 | rcu_read_unlock(); | |
1934 | } | |
1935 | ||
1936 | static inline bool task_in_memcg_oom(struct task_struct *p) | |
1937 | { | |
1938 | return false; | |
1939 | } | |
1940 | ||
1941 | static inline bool mem_cgroup_oom_synchronize(bool wait) | |
1942 | { | |
1943 | return false; | |
1944 | } | |
1945 | ||
1419ff98 RG |
1946 | static inline void mem_cgroup_enter_user_fault(void) |
1947 | { | |
1948 | } | |
1949 | ||
1950 | static inline void mem_cgroup_exit_user_fault(void) | |
1951 | { | |
1952 | } | |
1953 | ||
e93d4166 | 1954 | #endif /* CONFIG_MEMCG_V1 */ |
6f1173d6 | 1955 | |
8cdea7c0 | 1956 | #endif /* _LINUX_MEMCONTROL_H */ |