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 | |
64 | #define MEM_CGROUP_ID_MAX USHRT_MAX | |
65 | ||
66 | struct mem_cgroup_id { | |
67 | int id; | |
1c2d479a | 68 | refcount_t ref; |
71cd3113 JW |
69 | }; |
70 | ||
33398cf2 MH |
71 | /* |
72 | * Per memcg event counter is incremented at every pagein/pageout. With THP, | |
0845f831 RD |
73 | * it will be incremented by the number of pages. This counter is used |
74 | * to trigger some periodic events. This is straightforward and better | |
33398cf2 MH |
75 | * than using jiffies etc. to handle periodic memcg event. |
76 | */ | |
77 | enum mem_cgroup_events_target { | |
78 | MEM_CGROUP_TARGET_THRESH, | |
79 | MEM_CGROUP_TARGET_SOFTLIMIT, | |
33398cf2 MH |
80 | MEM_CGROUP_NTARGETS, |
81 | }; | |
82 | ||
410f8e82 SB |
83 | struct memcg_vmstats_percpu; |
84 | struct memcg_vmstats; | |
33398cf2 MH |
85 | |
86 | struct mem_cgroup_reclaim_iter { | |
87 | struct mem_cgroup *position; | |
88 | /* scan generation, increased every round-trip */ | |
89 | unsigned int generation; | |
90 | }; | |
91 | ||
0a4465d3 | 92 | /* |
3c6f17e6 YS |
93 | * Bitmap and deferred work of shrinker::id corresponding to memcg-aware |
94 | * shrinkers, which have elements charged to this memcg. | |
0a4465d3 | 95 | */ |
e4262c4f | 96 | struct shrinker_info { |
0a4465d3 | 97 | struct rcu_head rcu; |
3c6f17e6 YS |
98 | atomic_long_t *nr_deferred; |
99 | unsigned long *map; | |
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 | ||
114 | /* Pending child counts during tree propagation */ | |
115 | long state_pending[NR_VM_NODE_STAT_ITEMS]; | |
116 | }; | |
117 | ||
33398cf2 | 118 | /* |
242c37b4 | 119 | * per-node information in memory controller. |
33398cf2 | 120 | */ |
ef8f2327 | 121 | struct mem_cgroup_per_node { |
33398cf2 | 122 | struct lruvec lruvec; |
a983b5eb | 123 | |
7e1c0d6f SB |
124 | struct lruvec_stats_percpu __percpu *lruvec_stats_percpu; |
125 | struct lruvec_stats lruvec_stats; | |
a983b5eb | 126 | |
b4536f0c | 127 | unsigned long lru_zone_size[MAX_NR_ZONES][NR_LRU_LISTS]; |
33398cf2 | 128 | |
9da83f3f | 129 | struct mem_cgroup_reclaim_iter iter; |
33398cf2 | 130 | |
e4262c4f | 131 | struct shrinker_info __rcu *shrinker_info; |
0a432dcb | 132 | |
33398cf2 MH |
133 | struct rb_node tree_node; /* RB tree node */ |
134 | unsigned long usage_in_excess;/* Set to the value by which */ | |
135 | /* the soft limit is exceeded*/ | |
136 | bool on_tree; | |
137 | struct mem_cgroup *memcg; /* Back pointer, we cannot */ | |
138 | /* use container_of */ | |
139 | }; | |
140 | ||
33398cf2 MH |
141 | struct mem_cgroup_threshold { |
142 | struct eventfd_ctx *eventfd; | |
143 | unsigned long threshold; | |
144 | }; | |
145 | ||
146 | /* For threshold */ | |
147 | struct mem_cgroup_threshold_ary { | |
148 | /* An array index points to threshold just below or equal to usage. */ | |
149 | int current_threshold; | |
150 | /* Size of entries[] */ | |
151 | unsigned int size; | |
152 | /* Array of thresholds */ | |
307ed94c | 153 | struct mem_cgroup_threshold entries[]; |
33398cf2 MH |
154 | }; |
155 | ||
156 | struct mem_cgroup_thresholds { | |
157 | /* Primary thresholds array */ | |
158 | struct mem_cgroup_threshold_ary *primary; | |
159 | /* | |
160 | * Spare threshold array. | |
161 | * This is needed to make mem_cgroup_unregister_event() "never fail". | |
162 | * It must be able to store at least primary->size - 1 entries. | |
163 | */ | |
164 | struct mem_cgroup_threshold_ary *spare; | |
165 | }; | |
166 | ||
97b27821 TH |
167 | /* |
168 | * Remember four most recent foreign writebacks with dirty pages in this | |
169 | * cgroup. Inode sharing is expected to be uncommon and, even if we miss | |
170 | * one in a given round, we're likely to catch it later if it keeps | |
171 | * foreign-dirtying, so a fairly low count should be enough. | |
172 | * | |
173 | * See mem_cgroup_track_foreign_dirty_slowpath() for details. | |
174 | */ | |
175 | #define MEMCG_CGWB_FRN_CNT 4 | |
176 | ||
177 | struct memcg_cgwb_frn { | |
178 | u64 bdi_id; /* bdi->id of the foreign inode */ | |
179 | int memcg_id; /* memcg->css.id of foreign inode */ | |
180 | u64 at; /* jiffies_64 at the time of dirtying */ | |
181 | struct wb_completion done; /* tracks in-flight foreign writebacks */ | |
182 | }; | |
183 | ||
bf4f0599 RG |
184 | /* |
185 | * Bucket for arbitrarily byte-sized objects charged to a memory | |
186 | * cgroup. The bucket can be reparented in one piece when the cgroup | |
187 | * is destroyed, without having to round up the individual references | |
188 | * of all live memory objects in the wild. | |
189 | */ | |
190 | struct obj_cgroup { | |
191 | struct percpu_ref refcnt; | |
192 | struct mem_cgroup *memcg; | |
193 | atomic_t nr_charged_bytes; | |
194 | union { | |
0764db9b | 195 | struct list_head list; /* protected by objcg_lock */ |
bf4f0599 RG |
196 | struct rcu_head rcu; |
197 | }; | |
198 | }; | |
199 | ||
33398cf2 MH |
200 | /* |
201 | * The memory controller data structure. The memory controller controls both | |
202 | * page cache and RSS per cgroup. We would eventually like to provide | |
203 | * statistics based on the statistics developed by Rik Van Riel for clock-pro, | |
204 | * to help the administrator determine what knobs to tune. | |
205 | */ | |
206 | struct mem_cgroup { | |
207 | struct cgroup_subsys_state css; | |
208 | ||
73f576c0 JW |
209 | /* Private memcg ID. Used to ID objects that outlive the cgroup */ |
210 | struct mem_cgroup_id id; | |
211 | ||
33398cf2 | 212 | /* Accounted resources */ |
bd0b230f WL |
213 | struct page_counter memory; /* Both v1 & v2 */ |
214 | ||
215 | union { | |
216 | struct page_counter swap; /* v2 only */ | |
217 | struct page_counter memsw; /* v1 only */ | |
218 | }; | |
0db15298 JW |
219 | |
220 | /* Legacy consumer-oriented counters */ | |
bd0b230f WL |
221 | struct page_counter kmem; /* v1 only */ |
222 | struct page_counter tcpmem; /* v1 only */ | |
33398cf2 | 223 | |
f7e1cb6e JW |
224 | /* Range enforcement for interrupt charges */ |
225 | struct work_struct high_work; | |
226 | ||
f4840ccf JW |
227 | #if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_ZSWAP) |
228 | unsigned long zswap_max; | |
229 | #endif | |
230 | ||
33398cf2 MH |
231 | unsigned long soft_limit; |
232 | ||
233 | /* vmpressure notifications */ | |
234 | struct vmpressure vmpressure; | |
235 | ||
3d8b38eb RG |
236 | /* |
237 | * Should the OOM killer kill all belonging tasks, had it kill one? | |
238 | */ | |
239 | bool oom_group; | |
240 | ||
33398cf2 MH |
241 | /* protected by memcg_oom_lock */ |
242 | bool oom_lock; | |
243 | int under_oom; | |
244 | ||
245 | int swappiness; | |
246 | /* OOM-Killer disable */ | |
247 | int oom_kill_disable; | |
248 | ||
1e577f97 | 249 | /* memory.events and memory.events.local */ |
472912a2 | 250 | struct cgroup_file events_file; |
1e577f97 | 251 | struct cgroup_file events_local_file; |
472912a2 | 252 | |
f3a53a3a TH |
253 | /* handle for "memory.swap.events" */ |
254 | struct cgroup_file swap_events_file; | |
255 | ||
33398cf2 MH |
256 | /* protect arrays of thresholds */ |
257 | struct mutex thresholds_lock; | |
258 | ||
259 | /* thresholds for memory usage. RCU-protected */ | |
260 | struct mem_cgroup_thresholds thresholds; | |
261 | ||
262 | /* thresholds for mem+swap usage. RCU-protected */ | |
263 | struct mem_cgroup_thresholds memsw_thresholds; | |
264 | ||
265 | /* For oom notifier event fd */ | |
266 | struct list_head oom_notify; | |
267 | ||
268 | /* | |
269 | * Should we move charges of a task when a task is moved into this | |
270 | * mem_cgroup ? And what type of charges should we move ? | |
271 | */ | |
272 | unsigned long move_charge_at_immigrate; | |
e81bf979 AL |
273 | /* taken only while moving_account > 0 */ |
274 | spinlock_t move_lock; | |
275 | unsigned long move_lock_flags; | |
276 | ||
e6ad640b | 277 | CACHELINE_PADDING(_pad1_); |
e81bf979 | 278 | |
2d146aa3 | 279 | /* memory.stat */ |
410f8e82 | 280 | struct memcg_vmstats *vmstats; |
42a30035 | 281 | |
815744d7 | 282 | /* memory.events */ |
42a30035 | 283 | atomic_long_t memory_events[MEMCG_NR_MEMORY_EVENTS]; |
1e577f97 | 284 | atomic_long_t memory_events_local[MEMCG_NR_MEMORY_EVENTS]; |
33398cf2 | 285 | |
d886f4e4 JW |
286 | unsigned long socket_pressure; |
287 | ||
288 | /* Legacy tcp memory accounting */ | |
0db15298 JW |
289 | bool tcpmem_active; |
290 | int tcpmem_pressure; | |
d886f4e4 | 291 | |
84c07d11 | 292 | #ifdef CONFIG_MEMCG_KMEM |
33398cf2 | 293 | int kmemcg_id; |
bf4f0599 | 294 | struct obj_cgroup __rcu *objcg; |
0764db9b RG |
295 | /* list of inherited objcgs, protected by objcg_lock */ |
296 | struct list_head objcg_list; | |
33398cf2 MH |
297 | #endif |
298 | ||
e6ad640b | 299 | CACHELINE_PADDING(_pad2_); |
4df91062 FT |
300 | |
301 | /* | |
302 | * set > 0 if pages under this cgroup are moving to other cgroup. | |
303 | */ | |
304 | atomic_t moving_account; | |
305 | struct task_struct *move_lock_task; | |
306 | ||
4df91062 FT |
307 | struct memcg_vmstats_percpu __percpu *vmstats_percpu; |
308 | ||
33398cf2 MH |
309 | #ifdef CONFIG_CGROUP_WRITEBACK |
310 | struct list_head cgwb_list; | |
311 | struct wb_domain cgwb_domain; | |
97b27821 | 312 | struct memcg_cgwb_frn cgwb_frn[MEMCG_CGWB_FRN_CNT]; |
33398cf2 MH |
313 | #endif |
314 | ||
315 | /* List of events which userspace want to receive */ | |
316 | struct list_head event_list; | |
317 | spinlock_t event_list_lock; | |
318 | ||
87eaceb3 YS |
319 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
320 | struct deferred_split deferred_split_queue; | |
321 | #endif | |
322 | ||
bd74fdae YZ |
323 | #ifdef CONFIG_LRU_GEN |
324 | /* per-memcg mm_struct list */ | |
325 | struct lru_gen_mm_list mm_list; | |
326 | #endif | |
327 | ||
b51478a0 | 328 | struct mem_cgroup_per_node *nodeinfo[]; |
33398cf2 | 329 | }; |
7d828602 | 330 | |
a983b5eb | 331 | /* |
1813e51e SB |
332 | * size of first charge trial. |
333 | * TODO: maybe necessary to use big numbers in big irons or dynamic based of the | |
334 | * workload. | |
a983b5eb | 335 | */ |
1813e51e | 336 | #define MEMCG_CHARGE_BATCH 64U |
a983b5eb | 337 | |
7d828602 | 338 | extern struct mem_cgroup *root_mem_cgroup; |
56161634 | 339 | |
87944e29 RG |
340 | enum page_memcg_data_flags { |
341 | /* page->memcg_data is a pointer to an objcgs vector */ | |
342 | MEMCG_DATA_OBJCGS = (1UL << 0), | |
18b2db3b RG |
343 | /* page has been accounted as a non-slab kernel page */ |
344 | MEMCG_DATA_KMEM = (1UL << 1), | |
87944e29 | 345 | /* the next bit after the last actual flag */ |
18b2db3b | 346 | __NR_MEMCG_DATA_FLAGS = (1UL << 2), |
87944e29 RG |
347 | }; |
348 | ||
349 | #define MEMCG_DATA_FLAGS_MASK (__NR_MEMCG_DATA_FLAGS - 1) | |
350 | ||
1b7e4464 | 351 | static inline bool folio_memcg_kmem(struct folio *folio); |
b4e0b68f MS |
352 | |
353 | /* | |
354 | * After the initialization objcg->memcg is always pointing at | |
355 | * a valid memcg, but can be atomically swapped to the parent memcg. | |
356 | * | |
357 | * The caller must ensure that the returned memcg won't be released: | |
358 | * e.g. acquire the rcu_read_lock or css_set_lock. | |
359 | */ | |
360 | static inline struct mem_cgroup *obj_cgroup_memcg(struct obj_cgroup *objcg) | |
361 | { | |
362 | return READ_ONCE(objcg->memcg); | |
363 | } | |
364 | ||
365 | /* | |
1b7e4464 MWO |
366 | * __folio_memcg - Get the memory cgroup associated with a non-kmem folio |
367 | * @folio: Pointer to the folio. | |
b4e0b68f | 368 | * |
1b7e4464 MWO |
369 | * Returns a pointer to the memory cgroup associated with the folio, |
370 | * or NULL. This function assumes that the folio is known to have a | |
b4e0b68f | 371 | * proper memory cgroup pointer. It's not safe to call this function |
1b7e4464 MWO |
372 | * against some type of folios, e.g. slab folios or ex-slab folios or |
373 | * kmem folios. | |
b4e0b68f | 374 | */ |
1b7e4464 | 375 | static inline struct mem_cgroup *__folio_memcg(struct folio *folio) |
b4e0b68f | 376 | { |
1b7e4464 | 377 | unsigned long memcg_data = folio->memcg_data; |
b4e0b68f | 378 | |
1b7e4464 MWO |
379 | VM_BUG_ON_FOLIO(folio_test_slab(folio), folio); |
380 | VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_OBJCGS, folio); | |
381 | VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_KMEM, folio); | |
b4e0b68f MS |
382 | |
383 | return (struct mem_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); | |
384 | } | |
385 | ||
386 | /* | |
1b7e4464 MWO |
387 | * __folio_objcg - get the object cgroup associated with a kmem folio. |
388 | * @folio: Pointer to the folio. | |
b4e0b68f | 389 | * |
1b7e4464 MWO |
390 | * Returns a pointer to the object cgroup associated with the folio, |
391 | * or NULL. This function assumes that the folio is known to have a | |
b4e0b68f | 392 | * proper object cgroup pointer. It's not safe to call this function |
1b7e4464 MWO |
393 | * against some type of folios, e.g. slab folios or ex-slab folios or |
394 | * LRU folios. | |
b4e0b68f | 395 | */ |
1b7e4464 | 396 | static inline struct obj_cgroup *__folio_objcg(struct folio *folio) |
b4e0b68f | 397 | { |
1b7e4464 | 398 | unsigned long memcg_data = folio->memcg_data; |
b4e0b68f | 399 | |
1b7e4464 MWO |
400 | VM_BUG_ON_FOLIO(folio_test_slab(folio), folio); |
401 | VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_OBJCGS, folio); | |
402 | VM_BUG_ON_FOLIO(!(memcg_data & MEMCG_DATA_KMEM), folio); | |
b4e0b68f MS |
403 | |
404 | return (struct obj_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); | |
405 | } | |
406 | ||
bcfe06bf | 407 | /* |
1b7e4464 MWO |
408 | * folio_memcg - Get the memory cgroup associated with a folio. |
409 | * @folio: Pointer to the folio. | |
bcfe06bf | 410 | * |
1b7e4464 MWO |
411 | * Returns a pointer to the memory cgroup associated with the folio, |
412 | * or NULL. This function assumes that the folio is known to have a | |
bcfe06bf | 413 | * proper memory cgroup pointer. It's not safe to call this function |
1b7e4464 | 414 | * against some type of folios, e.g. slab folios or ex-slab folios. |
bcfe06bf | 415 | * |
1b7e4464 | 416 | * For a non-kmem folio any of the following ensures folio and memcg binding |
b4e0b68f MS |
417 | * stability: |
418 | * | |
1b7e4464 | 419 | * - the folio lock |
bcfe06bf RG |
420 | * - LRU isolation |
421 | * - lock_page_memcg() | |
422 | * - exclusive reference | |
018ee47f | 423 | * - mem_cgroup_trylock_pages() |
b4e0b68f | 424 | * |
1b7e4464 MWO |
425 | * For a kmem folio a caller should hold an rcu read lock to protect memcg |
426 | * associated with a kmem folio from being released. | |
bcfe06bf | 427 | */ |
1b7e4464 MWO |
428 | static inline struct mem_cgroup *folio_memcg(struct folio *folio) |
429 | { | |
430 | if (folio_memcg_kmem(folio)) | |
431 | return obj_cgroup_memcg(__folio_objcg(folio)); | |
432 | return __folio_memcg(folio); | |
433 | } | |
434 | ||
bcfe06bf RG |
435 | static inline struct mem_cgroup *page_memcg(struct page *page) |
436 | { | |
1b7e4464 | 437 | return folio_memcg(page_folio(page)); |
bcfe06bf RG |
438 | } |
439 | ||
c5ce619a MWO |
440 | /** |
441 | * folio_memcg_rcu - Locklessly get the memory cgroup associated with a folio. | |
442 | * @folio: Pointer to the folio. | |
bcfe06bf | 443 | * |
c5ce619a | 444 | * This function assumes that the folio is known to have a |
bcfe06bf | 445 | * proper memory cgroup pointer. It's not safe to call this function |
c5ce619a MWO |
446 | * against some type of folios, e.g. slab folios or ex-slab folios. |
447 | * | |
448 | * Return: A pointer to the memory cgroup associated with the folio, | |
449 | * or NULL. | |
bcfe06bf | 450 | */ |
c5ce619a | 451 | static inline struct mem_cgroup *folio_memcg_rcu(struct folio *folio) |
bcfe06bf | 452 | { |
c5ce619a | 453 | unsigned long memcg_data = READ_ONCE(folio->memcg_data); |
b4e0b68f | 454 | |
c5ce619a | 455 | VM_BUG_ON_FOLIO(folio_test_slab(folio), folio); |
bcfe06bf RG |
456 | WARN_ON_ONCE(!rcu_read_lock_held()); |
457 | ||
b4e0b68f MS |
458 | if (memcg_data & MEMCG_DATA_KMEM) { |
459 | struct obj_cgroup *objcg; | |
460 | ||
461 | objcg = (void *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); | |
462 | return obj_cgroup_memcg(objcg); | |
463 | } | |
464 | ||
465 | return (struct mem_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); | |
bcfe06bf RG |
466 | } |
467 | ||
468 | /* | |
becacb04 MW |
469 | * folio_memcg_check - Get the memory cgroup associated with a folio. |
470 | * @folio: Pointer to the folio. | |
bcfe06bf | 471 | * |
becacb04 MW |
472 | * Returns a pointer to the memory cgroup associated with the folio, |
473 | * or NULL. This function unlike folio_memcg() can take any folio | |
474 | * as an argument. It has to be used in cases when it's not known if a folio | |
b4e0b68f MS |
475 | * has an associated memory cgroup pointer or an object cgroups vector or |
476 | * an object cgroup. | |
477 | * | |
becacb04 | 478 | * For a non-kmem folio any of the following ensures folio and memcg binding |
b4e0b68f | 479 | * stability: |
bcfe06bf | 480 | * |
becacb04 | 481 | * - the folio lock |
bcfe06bf | 482 | * - LRU isolation |
becacb04 | 483 | * - lock_folio_memcg() |
bcfe06bf | 484 | * - exclusive reference |
018ee47f | 485 | * - mem_cgroup_trylock_pages() |
b4e0b68f | 486 | * |
becacb04 MW |
487 | * For a kmem folio a caller should hold an rcu read lock to protect memcg |
488 | * associated with a kmem folio from being released. | |
bcfe06bf | 489 | */ |
becacb04 | 490 | static inline struct mem_cgroup *folio_memcg_check(struct folio *folio) |
bcfe06bf RG |
491 | { |
492 | /* | |
becacb04 MW |
493 | * Because folio->memcg_data might be changed asynchronously |
494 | * for slabs, READ_ONCE() should be used here. | |
bcfe06bf | 495 | */ |
becacb04 | 496 | unsigned long memcg_data = READ_ONCE(folio->memcg_data); |
bcfe06bf | 497 | |
87944e29 | 498 | if (memcg_data & MEMCG_DATA_OBJCGS) |
bcfe06bf RG |
499 | return NULL; |
500 | ||
b4e0b68f MS |
501 | if (memcg_data & MEMCG_DATA_KMEM) { |
502 | struct obj_cgroup *objcg; | |
503 | ||
504 | objcg = (void *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); | |
505 | return obj_cgroup_memcg(objcg); | |
506 | } | |
507 | ||
18b2db3b RG |
508 | return (struct mem_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK); |
509 | } | |
510 | ||
becacb04 MW |
511 | static inline struct mem_cgroup *page_memcg_check(struct page *page) |
512 | { | |
513 | if (PageTail(page)) | |
514 | return NULL; | |
515 | return folio_memcg_check((struct folio *)page); | |
516 | } | |
517 | ||
88f2ef73 MS |
518 | static inline struct mem_cgroup *get_mem_cgroup_from_objcg(struct obj_cgroup *objcg) |
519 | { | |
520 | struct mem_cgroup *memcg; | |
521 | ||
522 | rcu_read_lock(); | |
523 | retry: | |
524 | memcg = obj_cgroup_memcg(objcg); | |
525 | if (unlikely(!css_tryget(&memcg->css))) | |
526 | goto retry; | |
527 | rcu_read_unlock(); | |
528 | ||
529 | return memcg; | |
530 | } | |
531 | ||
bd290e1e | 532 | #ifdef CONFIG_MEMCG_KMEM |
18b2db3b | 533 | /* |
1b7e4464 MWO |
534 | * folio_memcg_kmem - Check if the folio has the memcg_kmem flag set. |
535 | * @folio: Pointer to the folio. | |
18b2db3b | 536 | * |
1b7e4464 MWO |
537 | * Checks if the folio has MemcgKmem flag set. The caller must ensure |
538 | * that the folio has an associated memory cgroup. It's not safe to call | |
539 | * this function against some types of folios, e.g. slab folios. | |
18b2db3b | 540 | */ |
1b7e4464 | 541 | static inline bool folio_memcg_kmem(struct folio *folio) |
18b2db3b | 542 | { |
1b7e4464 MWO |
543 | VM_BUG_ON_PGFLAGS(PageTail(&folio->page), &folio->page); |
544 | VM_BUG_ON_FOLIO(folio->memcg_data & MEMCG_DATA_OBJCGS, folio); | |
545 | return folio->memcg_data & MEMCG_DATA_KMEM; | |
bcfe06bf RG |
546 | } |
547 | ||
270c6a71 | 548 | |
270c6a71 | 549 | #else |
1b7e4464 | 550 | static inline bool folio_memcg_kmem(struct folio *folio) |
bd290e1e MS |
551 | { |
552 | return false; | |
553 | } | |
554 | ||
270c6a71 RG |
555 | #endif |
556 | ||
1b7e4464 MWO |
557 | static inline bool PageMemcgKmem(struct page *page) |
558 | { | |
559 | return folio_memcg_kmem(page_folio(page)); | |
560 | } | |
561 | ||
dfd2f10c KT |
562 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
563 | { | |
564 | return (memcg == root_mem_cgroup); | |
565 | } | |
566 | ||
23047a96 JW |
567 | static inline bool mem_cgroup_disabled(void) |
568 | { | |
569 | return !cgroup_subsys_enabled(memory_cgrp_subsys); | |
570 | } | |
571 | ||
f56ce412 JW |
572 | static inline void mem_cgroup_protection(struct mem_cgroup *root, |
573 | struct mem_cgroup *memcg, | |
574 | unsigned long *min, | |
575 | unsigned long *low) | |
9783aa99 | 576 | { |
f56ce412 JW |
577 | *min = *low = 0; |
578 | ||
1bc63fb1 | 579 | if (mem_cgroup_disabled()) |
f56ce412 | 580 | return; |
1bc63fb1 | 581 | |
22f7496f YS |
582 | /* |
583 | * There is no reclaim protection applied to a targeted reclaim. | |
584 | * We are special casing this specific case here because | |
585 | * mem_cgroup_protected calculation is not robust enough to keep | |
586 | * the protection invariant for calculated effective values for | |
587 | * parallel reclaimers with different reclaim target. This is | |
588 | * especially a problem for tail memcgs (as they have pages on LRU) | |
589 | * which would want to have effective values 0 for targeted reclaim | |
590 | * but a different value for external reclaim. | |
591 | * | |
592 | * Example | |
593 | * Let's have global and A's reclaim in parallel: | |
594 | * | | |
595 | * A (low=2G, usage = 3G, max = 3G, children_low_usage = 1.5G) | |
596 | * |\ | |
597 | * | C (low = 1G, usage = 2.5G) | |
598 | * B (low = 1G, usage = 0.5G) | |
599 | * | |
600 | * For the global reclaim | |
601 | * A.elow = A.low | |
602 | * B.elow = min(B.usage, B.low) because children_low_usage <= A.elow | |
603 | * C.elow = min(C.usage, C.low) | |
604 | * | |
605 | * With the effective values resetting we have A reclaim | |
606 | * A.elow = 0 | |
607 | * B.elow = B.low | |
608 | * C.elow = C.low | |
609 | * | |
610 | * If the global reclaim races with A's reclaim then | |
611 | * B.elow = C.elow = 0 because children_low_usage > A.elow) | |
612 | * is possible and reclaiming B would be violating the protection. | |
613 | * | |
614 | */ | |
615 | if (root == memcg) | |
f56ce412 | 616 | return; |
9783aa99 | 617 | |
f56ce412 JW |
618 | *min = READ_ONCE(memcg->memory.emin); |
619 | *low = READ_ONCE(memcg->memory.elow); | |
9783aa99 CD |
620 | } |
621 | ||
45c7f7e1 CD |
622 | void mem_cgroup_calculate_protection(struct mem_cgroup *root, |
623 | struct mem_cgroup *memcg); | |
624 | ||
adb82130 YA |
625 | static inline bool mem_cgroup_unprotected(struct mem_cgroup *target, |
626 | struct mem_cgroup *memcg) | |
45c7f7e1 CD |
627 | { |
628 | /* | |
629 | * The root memcg doesn't account charges, and doesn't support | |
adb82130 YA |
630 | * protection. The target memcg's protection is ignored, see |
631 | * mem_cgroup_calculate_protection() and mem_cgroup_protection() | |
45c7f7e1 | 632 | */ |
adb82130 YA |
633 | return mem_cgroup_disabled() || mem_cgroup_is_root(memcg) || |
634 | memcg == target; | |
45c7f7e1 CD |
635 | } |
636 | ||
adb82130 YA |
637 | static inline bool mem_cgroup_below_low(struct mem_cgroup *target, |
638 | struct mem_cgroup *memcg) | |
45c7f7e1 | 639 | { |
adb82130 | 640 | if (mem_cgroup_unprotected(target, memcg)) |
45c7f7e1 CD |
641 | return false; |
642 | ||
643 | return READ_ONCE(memcg->memory.elow) >= | |
644 | page_counter_read(&memcg->memory); | |
645 | } | |
646 | ||
adb82130 YA |
647 | static inline bool mem_cgroup_below_min(struct mem_cgroup *target, |
648 | struct mem_cgroup *memcg) | |
45c7f7e1 | 649 | { |
adb82130 | 650 | if (mem_cgroup_unprotected(target, memcg)) |
45c7f7e1 CD |
651 | return false; |
652 | ||
653 | return READ_ONCE(memcg->memory.emin) >= | |
654 | page_counter_read(&memcg->memory); | |
655 | } | |
241994ed | 656 | |
8f425e4e MWO |
657 | int __mem_cgroup_charge(struct folio *folio, struct mm_struct *mm, gfp_t gfp); |
658 | ||
659 | /** | |
660 | * mem_cgroup_charge - Charge a newly allocated folio to a cgroup. | |
661 | * @folio: Folio to charge. | |
662 | * @mm: mm context of the allocating task. | |
663 | * @gfp: Reclaim mode. | |
664 | * | |
665 | * Try to charge @folio to the memcg that @mm belongs to, reclaiming | |
666 | * pages according to @gfp if necessary. If @mm is NULL, try to | |
667 | * charge to the active memcg. | |
668 | * | |
669 | * Do not use this for folios allocated for swapin. | |
670 | * | |
671 | * Return: 0 on success. Otherwise, an error code is returned. | |
672 | */ | |
673 | static inline int mem_cgroup_charge(struct folio *folio, struct mm_struct *mm, | |
674 | gfp_t gfp) | |
2c8d8f97 SB |
675 | { |
676 | if (mem_cgroup_disabled()) | |
677 | return 0; | |
8f425e4e | 678 | return __mem_cgroup_charge(folio, mm, gfp); |
2c8d8f97 SB |
679 | } |
680 | ||
65995918 | 681 | int mem_cgroup_swapin_charge_folio(struct folio *folio, struct mm_struct *mm, |
0add0c77 SB |
682 | gfp_t gfp, swp_entry_t entry); |
683 | void mem_cgroup_swapin_uncharge_swap(swp_entry_t entry); | |
3fea5a49 | 684 | |
bbc6b703 MWO |
685 | void __mem_cgroup_uncharge(struct folio *folio); |
686 | ||
687 | /** | |
688 | * mem_cgroup_uncharge - Uncharge a folio. | |
689 | * @folio: Folio to uncharge. | |
690 | * | |
691 | * Uncharge a folio previously charged with mem_cgroup_charge(). | |
692 | */ | |
693 | static inline void mem_cgroup_uncharge(struct folio *folio) | |
2c8d8f97 SB |
694 | { |
695 | if (mem_cgroup_disabled()) | |
696 | return; | |
bbc6b703 | 697 | __mem_cgroup_uncharge(folio); |
2c8d8f97 SB |
698 | } |
699 | ||
700 | void __mem_cgroup_uncharge_list(struct list_head *page_list); | |
701 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) | |
702 | { | |
703 | if (mem_cgroup_disabled()) | |
704 | return; | |
705 | __mem_cgroup_uncharge_list(page_list); | |
706 | } | |
569b846d | 707 | |
d21bba2b | 708 | void mem_cgroup_migrate(struct folio *old, struct folio *new); |
569b846d | 709 | |
55779ec7 | 710 | /** |
867e5e1d | 711 | * mem_cgroup_lruvec - get the lru list vector for a memcg & node |
55779ec7 | 712 | * @memcg: memcg of the wanted lruvec |
9a1ac228 | 713 | * @pgdat: pglist_data |
55779ec7 | 714 | * |
867e5e1d | 715 | * Returns the lru list vector holding pages for a given @memcg & |
9a1ac228 | 716 | * @pgdat combination. This can be the node lruvec, if the memory |
867e5e1d | 717 | * controller is disabled. |
55779ec7 | 718 | */ |
867e5e1d JW |
719 | static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg, |
720 | struct pglist_data *pgdat) | |
55779ec7 | 721 | { |
ef8f2327 | 722 | struct mem_cgroup_per_node *mz; |
55779ec7 JW |
723 | struct lruvec *lruvec; |
724 | ||
725 | if (mem_cgroup_disabled()) { | |
867e5e1d | 726 | lruvec = &pgdat->__lruvec; |
55779ec7 JW |
727 | goto out; |
728 | } | |
729 | ||
1b05117d JW |
730 | if (!memcg) |
731 | memcg = root_mem_cgroup; | |
732 | ||
a3747b53 | 733 | mz = memcg->nodeinfo[pgdat->node_id]; |
55779ec7 JW |
734 | lruvec = &mz->lruvec; |
735 | out: | |
736 | /* | |
737 | * Since a node can be onlined after the mem_cgroup was created, | |
599d0c95 | 738 | * we have to be prepared to initialize lruvec->pgdat here; |
55779ec7 JW |
739 | * and if offlined then reonlined, we need to reinitialize it. |
740 | */ | |
ef8f2327 MG |
741 | if (unlikely(lruvec->pgdat != pgdat)) |
742 | lruvec->pgdat = pgdat; | |
55779ec7 JW |
743 | return lruvec; |
744 | } | |
745 | ||
9a1ac228 | 746 | /** |
b1baabd9 MWO |
747 | * folio_lruvec - return lruvec for isolating/putting an LRU folio |
748 | * @folio: Pointer to the folio. | |
9a1ac228 | 749 | * |
b1baabd9 | 750 | * This function relies on folio->mem_cgroup being stable. |
9a1ac228 | 751 | */ |
b1baabd9 | 752 | static inline struct lruvec *folio_lruvec(struct folio *folio) |
9a1ac228 | 753 | { |
b1baabd9 | 754 | struct mem_cgroup *memcg = folio_memcg(folio); |
9a1ac228 | 755 | |
b1baabd9 MWO |
756 | VM_WARN_ON_ONCE_FOLIO(!memcg && !mem_cgroup_disabled(), folio); |
757 | return mem_cgroup_lruvec(memcg, folio_pgdat(folio)); | |
9a1ac228 | 758 | } |
c9b0ed51 | 759 | |
64219994 | 760 | struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
e993d905 | 761 | |
d46eb14b SB |
762 | struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm); |
763 | ||
e809c3fe MWO |
764 | struct lruvec *folio_lruvec_lock(struct folio *folio); |
765 | struct lruvec *folio_lruvec_lock_irq(struct folio *folio); | |
766 | struct lruvec *folio_lruvec_lock_irqsave(struct folio *folio, | |
6168d0da AS |
767 | unsigned long *flags); |
768 | ||
769 | #ifdef CONFIG_DEBUG_VM | |
e809c3fe | 770 | void lruvec_memcg_debug(struct lruvec *lruvec, struct folio *folio); |
6168d0da | 771 | #else |
e809c3fe MWO |
772 | static inline |
773 | void lruvec_memcg_debug(struct lruvec *lruvec, struct folio *folio) | |
6168d0da AS |
774 | { |
775 | } | |
776 | #endif | |
777 | ||
33398cf2 MH |
778 | static inline |
779 | struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){ | |
780 | return css ? container_of(css, struct mem_cgroup, css) : NULL; | |
781 | } | |
782 | ||
bf4f0599 RG |
783 | static inline bool obj_cgroup_tryget(struct obj_cgroup *objcg) |
784 | { | |
785 | return percpu_ref_tryget(&objcg->refcnt); | |
786 | } | |
787 | ||
788 | static inline void obj_cgroup_get(struct obj_cgroup *objcg) | |
789 | { | |
790 | percpu_ref_get(&objcg->refcnt); | |
791 | } | |
792 | ||
b4e0b68f MS |
793 | static inline void obj_cgroup_get_many(struct obj_cgroup *objcg, |
794 | unsigned long nr) | |
bf4f0599 | 795 | { |
b4e0b68f | 796 | percpu_ref_get_many(&objcg->refcnt, nr); |
bf4f0599 RG |
797 | } |
798 | ||
b4e0b68f | 799 | static inline void obj_cgroup_put(struct obj_cgroup *objcg) |
bf4f0599 | 800 | { |
b4e0b68f | 801 | percpu_ref_put(&objcg->refcnt); |
bf4f0599 RG |
802 | } |
803 | ||
e4dde56c YZ |
804 | static inline bool mem_cgroup_tryget(struct mem_cgroup *memcg) |
805 | { | |
806 | return !memcg || css_tryget(&memcg->css); | |
807 | } | |
808 | ||
dc0b5864 RG |
809 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
810 | { | |
d46eb14b SB |
811 | if (memcg) |
812 | css_put(&memcg->css); | |
dc0b5864 RG |
813 | } |
814 | ||
8e8ae645 JW |
815 | #define mem_cgroup_from_counter(counter, member) \ |
816 | container_of(counter, struct mem_cgroup, member) | |
817 | ||
33398cf2 MH |
818 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
819 | struct mem_cgroup *, | |
820 | struct mem_cgroup_reclaim_cookie *); | |
821 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); | |
7c5f64f8 VD |
822 | int mem_cgroup_scan_tasks(struct mem_cgroup *, |
823 | int (*)(struct task_struct *, void *), void *); | |
33398cf2 | 824 | |
23047a96 JW |
825 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
826 | { | |
827 | if (mem_cgroup_disabled()) | |
828 | return 0; | |
829 | ||
73f576c0 | 830 | return memcg->id.id; |
23047a96 | 831 | } |
73f576c0 | 832 | struct mem_cgroup *mem_cgroup_from_id(unsigned short id); |
23047a96 | 833 | |
c15187a4 RG |
834 | #ifdef CONFIG_SHRINKER_DEBUG |
835 | static inline unsigned long mem_cgroup_ino(struct mem_cgroup *memcg) | |
836 | { | |
837 | return memcg ? cgroup_ino(memcg->css.cgroup) : 0; | |
838 | } | |
839 | ||
840 | struct mem_cgroup *mem_cgroup_get_from_ino(unsigned long ino); | |
841 | #endif | |
842 | ||
aa9694bb CD |
843 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
844 | { | |
845 | return mem_cgroup_from_css(seq_css(m)); | |
846 | } | |
847 | ||
2262185c RG |
848 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
849 | { | |
850 | struct mem_cgroup_per_node *mz; | |
851 | ||
852 | if (mem_cgroup_disabled()) | |
853 | return NULL; | |
854 | ||
855 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
856 | return mz->memcg; | |
857 | } | |
858 | ||
8e8ae645 JW |
859 | /** |
860 | * parent_mem_cgroup - find the accounting parent of a memcg | |
861 | * @memcg: memcg whose parent to find | |
862 | * | |
863 | * Returns the parent memcg, or NULL if this is the root or the memory | |
864 | * controller is in legacy no-hierarchy mode. | |
865 | */ | |
866 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) | |
867 | { | |
486bc706 | 868 | return mem_cgroup_from_css(memcg->css.parent); |
8e8ae645 JW |
869 | } |
870 | ||
33398cf2 MH |
871 | static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg, |
872 | struct mem_cgroup *root) | |
873 | { | |
874 | if (root == memcg) | |
875 | return true; | |
33398cf2 MH |
876 | return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup); |
877 | } | |
e1aab161 | 878 | |
2314b42d JW |
879 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
880 | struct mem_cgroup *memcg) | |
2e4d4091 | 881 | { |
587af308 | 882 | struct mem_cgroup *task_memcg; |
413918bb | 883 | bool match = false; |
c3ac9a8a | 884 | |
2e4d4091 | 885 | rcu_read_lock(); |
587af308 | 886 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
413918bb | 887 | if (task_memcg) |
2314b42d | 888 | match = mem_cgroup_is_descendant(task_memcg, memcg); |
2e4d4091 | 889 | rcu_read_unlock(); |
c3ac9a8a | 890 | return match; |
2e4d4091 | 891 | } |
8a9f3ccd | 892 | |
75376c6f | 893 | struct cgroup_subsys_state *mem_cgroup_css_from_folio(struct folio *folio); |
2fc04524 | 894 | ino_t page_cgroup_ino(struct page *page); |
d324236b | 895 | |
eb01aaab VD |
896 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
897 | { | |
898 | if (mem_cgroup_disabled()) | |
899 | return true; | |
900 | return !!(memcg->css.flags & CSS_ONLINE); | |
901 | } | |
902 | ||
33398cf2 | 903 | void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, |
b4536f0c | 904 | int zid, int nr_pages); |
33398cf2 | 905 | |
b4536f0c MH |
906 | static inline |
907 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
908 | enum lru_list lru, int zone_idx) | |
909 | { | |
910 | struct mem_cgroup_per_node *mz; | |
911 | ||
912 | mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
e0e3f42f | 913 | return READ_ONCE(mz->lru_zone_size[zone_idx][lru]); |
33398cf2 MH |
914 | } |
915 | ||
b23afb93 TH |
916 | void mem_cgroup_handle_over_high(void); |
917 | ||
bbec2e15 | 918 | unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg); |
7c5f64f8 | 919 | |
9783aa99 CD |
920 | unsigned long mem_cgroup_size(struct mem_cgroup *memcg); |
921 | ||
f0c867d9 | 922 | void mem_cgroup_print_oom_context(struct mem_cgroup *memcg, |
64219994 | 923 | struct task_struct *p); |
58ae83db | 924 | |
f0c867d9 | 925 | void mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg); |
926 | ||
29ef680a | 927 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 | 928 | { |
29ef680a MH |
929 | WARN_ON(current->in_user_fault); |
930 | current->in_user_fault = 1; | |
519e5247 JW |
931 | } |
932 | ||
29ef680a | 933 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 | 934 | { |
29ef680a MH |
935 | WARN_ON(!current->in_user_fault); |
936 | current->in_user_fault = 0; | |
519e5247 JW |
937 | } |
938 | ||
3812c8c8 JW |
939 | static inline bool task_in_memcg_oom(struct task_struct *p) |
940 | { | |
626ebc41 | 941 | return p->memcg_in_oom; |
3812c8c8 JW |
942 | } |
943 | ||
49426420 | 944 | bool mem_cgroup_oom_synchronize(bool wait); |
3d8b38eb RG |
945 | struct mem_cgroup *mem_cgroup_get_oom_group(struct task_struct *victim, |
946 | struct mem_cgroup *oom_domain); | |
947 | void mem_cgroup_print_oom_group(struct mem_cgroup *memcg); | |
3812c8c8 | 948 | |
f70ad448 MWO |
949 | void folio_memcg_lock(struct folio *folio); |
950 | void folio_memcg_unlock(struct folio *folio); | |
1c824a68 | 951 | void lock_page_memcg(struct page *page); |
62cccb8c | 952 | void unlock_page_memcg(struct page *page); |
d7365e78 | 953 | |
db9adbcb | 954 | void __mod_memcg_state(struct mem_cgroup *memcg, int idx, int val); |
2a2e4885 | 955 | |
018ee47f YZ |
956 | /* try to stablize folio_memcg() for all the pages in a memcg */ |
957 | static inline bool mem_cgroup_trylock_pages(struct mem_cgroup *memcg) | |
958 | { | |
959 | rcu_read_lock(); | |
960 | ||
961 | if (mem_cgroup_disabled() || !atomic_read(&memcg->moving_account)) | |
962 | return true; | |
963 | ||
964 | rcu_read_unlock(); | |
965 | return false; | |
966 | } | |
967 | ||
968 | static inline void mem_cgroup_unlock_pages(void) | |
969 | { | |
970 | rcu_read_unlock(); | |
971 | } | |
972 | ||
04fecbf5 | 973 | /* idx can be of type enum memcg_stat_item or node_stat_item */ |
00f3ca2c | 974 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 975 | int idx, int val) |
2a2e4885 | 976 | { |
c3cc3911 JW |
977 | unsigned long flags; |
978 | ||
979 | local_irq_save(flags); | |
a983b5eb | 980 | __mod_memcg_state(memcg, idx, val); |
c3cc3911 | 981 | local_irq_restore(flags); |
2a2e4885 JW |
982 | } |
983 | ||
4e5aa1f4 SB |
984 | static inline void mod_memcg_page_state(struct page *page, |
985 | int idx, int val) | |
986 | { | |
987 | struct mem_cgroup *memcg; | |
988 | ||
989 | if (mem_cgroup_disabled()) | |
990 | return; | |
991 | ||
992 | rcu_read_lock(); | |
993 | memcg = page_memcg(page); | |
994 | if (memcg) | |
995 | mod_memcg_state(memcg, idx, val); | |
996 | rcu_read_unlock(); | |
997 | } | |
998 | ||
410f8e82 | 999 | unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx); |
7490a2d2 | 1000 | |
42a30035 JW |
1001 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
1002 | enum node_stat_item idx) | |
1003 | { | |
1004 | struct mem_cgroup_per_node *pn; | |
dbb16df6 | 1005 | long x; |
42a30035 JW |
1006 | |
1007 | if (mem_cgroup_disabled()) | |
1008 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
1009 | ||
1010 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
dbb16df6 SB |
1011 | x = READ_ONCE(pn->lruvec_stats.state[idx]); |
1012 | #ifdef CONFIG_SMP | |
1013 | if (x < 0) | |
1014 | x = 0; | |
1015 | #endif | |
1016 | return x; | |
42a30035 JW |
1017 | } |
1018 | ||
205b20cc JW |
1019 | static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
1020 | enum node_stat_item idx) | |
2a7106f2 | 1021 | { |
00f3ca2c | 1022 | struct mem_cgroup_per_node *pn; |
815744d7 JW |
1023 | long x = 0; |
1024 | int cpu; | |
00f3ca2c JW |
1025 | |
1026 | if (mem_cgroup_disabled()) | |
1027 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
1028 | ||
1029 | pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); | |
815744d7 | 1030 | for_each_possible_cpu(cpu) |
7e1c0d6f | 1031 | x += per_cpu(pn->lruvec_stats_percpu->state[idx], cpu); |
a983b5eb JW |
1032 | #ifdef CONFIG_SMP |
1033 | if (x < 0) | |
1034 | x = 0; | |
1035 | #endif | |
1036 | return x; | |
2a7106f2 GT |
1037 | } |
1038 | ||
aa48e47e | 1039 | void mem_cgroup_flush_stats(void); |
9b301615 | 1040 | void mem_cgroup_flush_stats_delayed(void); |
aa48e47e | 1041 | |
eedc4e5a RG |
1042 | void __mod_memcg_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx, |
1043 | int val); | |
da3ceeff | 1044 | void __mod_lruvec_kmem_state(void *p, enum node_stat_item idx, int val); |
991e7673 | 1045 | |
da3ceeff | 1046 | static inline void mod_lruvec_kmem_state(void *p, enum node_stat_item idx, |
991e7673 SB |
1047 | int val) |
1048 | { | |
1049 | unsigned long flags; | |
1050 | ||
1051 | local_irq_save(flags); | |
da3ceeff | 1052 | __mod_lruvec_kmem_state(p, idx, val); |
991e7673 SB |
1053 | local_irq_restore(flags); |
1054 | } | |
1055 | ||
eedc4e5a RG |
1056 | static inline void mod_memcg_lruvec_state(struct lruvec *lruvec, |
1057 | enum node_stat_item idx, int val) | |
1058 | { | |
1059 | unsigned long flags; | |
1060 | ||
1061 | local_irq_save(flags); | |
1062 | __mod_memcg_lruvec_state(lruvec, idx, val); | |
1063 | local_irq_restore(flags); | |
1064 | } | |
1065 | ||
db9adbcb JW |
1066 | void __count_memcg_events(struct mem_cgroup *memcg, enum vm_event_item idx, |
1067 | unsigned long count); | |
c9019e9b | 1068 | |
2262185c | 1069 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
e27be240 JW |
1070 | enum vm_event_item idx, |
1071 | unsigned long count) | |
2262185c | 1072 | { |
c3cc3911 JW |
1073 | unsigned long flags; |
1074 | ||
1075 | local_irq_save(flags); | |
a983b5eb | 1076 | __count_memcg_events(memcg, idx, count); |
c3cc3911 | 1077 | local_irq_restore(flags); |
2262185c RG |
1078 | } |
1079 | ||
1080 | static inline void count_memcg_page_event(struct page *page, | |
e27be240 | 1081 | enum vm_event_item idx) |
2262185c | 1082 | { |
bcfe06bf RG |
1083 | struct mem_cgroup *memcg = page_memcg(page); |
1084 | ||
1085 | if (memcg) | |
1086 | count_memcg_events(memcg, idx, 1); | |
2262185c RG |
1087 | } |
1088 | ||
64daa5d8 MWO |
1089 | static inline void count_memcg_folio_events(struct folio *folio, |
1090 | enum vm_event_item idx, unsigned long nr) | |
1091 | { | |
1092 | struct mem_cgroup *memcg = folio_memcg(folio); | |
1093 | ||
1094 | if (memcg) | |
1095 | count_memcg_events(memcg, idx, nr); | |
1096 | } | |
1097 | ||
2262185c RG |
1098 | static inline void count_memcg_event_mm(struct mm_struct *mm, |
1099 | enum vm_event_item idx) | |
68ae564b | 1100 | { |
33398cf2 MH |
1101 | struct mem_cgroup *memcg; |
1102 | ||
68ae564b DR |
1103 | if (mem_cgroup_disabled()) |
1104 | return; | |
33398cf2 MH |
1105 | |
1106 | rcu_read_lock(); | |
1107 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
fe6bdfc8 | 1108 | if (likely(memcg)) |
c9019e9b | 1109 | count_memcg_events(memcg, idx, 1); |
33398cf2 | 1110 | rcu_read_unlock(); |
68ae564b | 1111 | } |
c9019e9b | 1112 | |
e27be240 JW |
1113 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
1114 | enum memcg_memory_event event) | |
c9019e9b | 1115 | { |
8b21ca02 MS |
1116 | bool swap_event = event == MEMCG_SWAP_HIGH || event == MEMCG_SWAP_MAX || |
1117 | event == MEMCG_SWAP_FAIL; | |
1118 | ||
1e577f97 | 1119 | atomic_long_inc(&memcg->memory_events_local[event]); |
8b21ca02 MS |
1120 | if (!swap_event) |
1121 | cgroup_file_notify(&memcg->events_local_file); | |
1e577f97 | 1122 | |
9852ae3f CD |
1123 | do { |
1124 | atomic_long_inc(&memcg->memory_events[event]); | |
8b21ca02 MS |
1125 | if (swap_event) |
1126 | cgroup_file_notify(&memcg->swap_events_file); | |
1127 | else | |
1128 | cgroup_file_notify(&memcg->events_file); | |
9852ae3f | 1129 | |
04fd61a4 YS |
1130 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys)) |
1131 | break; | |
9852ae3f CD |
1132 | if (cgrp_dfl_root.flags & CGRP_ROOT_MEMORY_LOCAL_EVENTS) |
1133 | break; | |
1134 | } while ((memcg = parent_mem_cgroup(memcg)) && | |
1135 | !mem_cgroup_is_root(memcg)); | |
c9019e9b JW |
1136 | } |
1137 | ||
fe6bdfc8 RG |
1138 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
1139 | enum memcg_memory_event event) | |
1140 | { | |
1141 | struct mem_cgroup *memcg; | |
1142 | ||
1143 | if (mem_cgroup_disabled()) | |
1144 | return; | |
1145 | ||
1146 | rcu_read_lock(); | |
1147 | memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); | |
1148 | if (likely(memcg)) | |
1149 | memcg_memory_event(memcg, event); | |
1150 | rcu_read_unlock(); | |
1151 | } | |
1152 | ||
be6c8982 | 1153 | void split_page_memcg(struct page *head, unsigned int nr); |
ca3e0214 | 1154 | |
2d146aa3 JW |
1155 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, |
1156 | gfp_t gfp_mask, | |
1157 | unsigned long *total_scanned); | |
1158 | ||
c255a458 | 1159 | #else /* CONFIG_MEMCG */ |
23047a96 JW |
1160 | |
1161 | #define MEM_CGROUP_ID_SHIFT 0 | |
1162 | #define MEM_CGROUP_ID_MAX 0 | |
1163 | ||
1b7e4464 MWO |
1164 | static inline struct mem_cgroup *folio_memcg(struct folio *folio) |
1165 | { | |
1166 | return NULL; | |
1167 | } | |
1168 | ||
bcfe06bf RG |
1169 | static inline struct mem_cgroup *page_memcg(struct page *page) |
1170 | { | |
1171 | return NULL; | |
1172 | } | |
1173 | ||
c5ce619a | 1174 | static inline struct mem_cgroup *folio_memcg_rcu(struct folio *folio) |
bcfe06bf RG |
1175 | { |
1176 | WARN_ON_ONCE(!rcu_read_lock_held()); | |
1177 | return NULL; | |
1178 | } | |
1179 | ||
becacb04 MW |
1180 | static inline struct mem_cgroup *folio_memcg_check(struct folio *folio) |
1181 | { | |
1182 | return NULL; | |
1183 | } | |
1184 | ||
bcfe06bf RG |
1185 | static inline struct mem_cgroup *page_memcg_check(struct page *page) |
1186 | { | |
1187 | return NULL; | |
1188 | } | |
1189 | ||
1b7e4464 MWO |
1190 | static inline bool folio_memcg_kmem(struct folio *folio) |
1191 | { | |
1192 | return false; | |
1193 | } | |
1194 | ||
18b2db3b RG |
1195 | static inline bool PageMemcgKmem(struct page *page) |
1196 | { | |
1197 | return false; | |
1198 | } | |
1199 | ||
dfd2f10c KT |
1200 | static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) |
1201 | { | |
1202 | return true; | |
1203 | } | |
1204 | ||
23047a96 JW |
1205 | static inline bool mem_cgroup_disabled(void) |
1206 | { | |
1207 | return true; | |
1208 | } | |
1209 | ||
e27be240 JW |
1210 | static inline void memcg_memory_event(struct mem_cgroup *memcg, |
1211 | enum memcg_memory_event event) | |
241994ed JW |
1212 | { |
1213 | } | |
1214 | ||
fe6bdfc8 RG |
1215 | static inline void memcg_memory_event_mm(struct mm_struct *mm, |
1216 | enum memcg_memory_event event) | |
1217 | { | |
1218 | } | |
1219 | ||
f56ce412 JW |
1220 | static inline void mem_cgroup_protection(struct mem_cgroup *root, |
1221 | struct mem_cgroup *memcg, | |
1222 | unsigned long *min, | |
1223 | unsigned long *low) | |
9783aa99 | 1224 | { |
f56ce412 | 1225 | *min = *low = 0; |
9783aa99 CD |
1226 | } |
1227 | ||
45c7f7e1 CD |
1228 | static inline void mem_cgroup_calculate_protection(struct mem_cgroup *root, |
1229 | struct mem_cgroup *memcg) | |
1230 | { | |
1231 | } | |
1232 | ||
adb82130 YA |
1233 | static inline bool mem_cgroup_unprotected(struct mem_cgroup *target, |
1234 | struct mem_cgroup *memcg) | |
1235 | { | |
1236 | return true; | |
1237 | } | |
1238 | static inline bool mem_cgroup_below_low(struct mem_cgroup *target, | |
1239 | struct mem_cgroup *memcg) | |
45c7f7e1 CD |
1240 | { |
1241 | return false; | |
1242 | } | |
1243 | ||
adb82130 YA |
1244 | static inline bool mem_cgroup_below_min(struct mem_cgroup *target, |
1245 | struct mem_cgroup *memcg) | |
241994ed | 1246 | { |
45c7f7e1 | 1247 | return false; |
241994ed JW |
1248 | } |
1249 | ||
8f425e4e MWO |
1250 | static inline int mem_cgroup_charge(struct folio *folio, |
1251 | struct mm_struct *mm, gfp_t gfp) | |
3fea5a49 JW |
1252 | { |
1253 | return 0; | |
1254 | } | |
1255 | ||
65995918 | 1256 | static inline int mem_cgroup_swapin_charge_folio(struct folio *folio, |
0add0c77 SB |
1257 | struct mm_struct *mm, gfp_t gfp, swp_entry_t entry) |
1258 | { | |
1259 | return 0; | |
1260 | } | |
1261 | ||
1262 | static inline void mem_cgroup_swapin_uncharge_swap(swp_entry_t entry) | |
1263 | { | |
1264 | } | |
1265 | ||
bbc6b703 | 1266 | static inline void mem_cgroup_uncharge(struct folio *folio) |
569b846d KH |
1267 | { |
1268 | } | |
1269 | ||
747db954 | 1270 | static inline void mem_cgroup_uncharge_list(struct list_head *page_list) |
8a9f3ccd BS |
1271 | { |
1272 | } | |
1273 | ||
d21bba2b | 1274 | static inline void mem_cgroup_migrate(struct folio *old, struct folio *new) |
69029cd5 KH |
1275 | { |
1276 | } | |
1277 | ||
867e5e1d JW |
1278 | static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg, |
1279 | struct pglist_data *pgdat) | |
08e552c6 | 1280 | { |
867e5e1d | 1281 | return &pgdat->__lruvec; |
08e552c6 KH |
1282 | } |
1283 | ||
b1baabd9 | 1284 | static inline struct lruvec *folio_lruvec(struct folio *folio) |
66e1707b | 1285 | { |
b1baabd9 | 1286 | struct pglist_data *pgdat = folio_pgdat(folio); |
867e5e1d | 1287 | return &pgdat->__lruvec; |
66e1707b BS |
1288 | } |
1289 | ||
e809c3fe MWO |
1290 | static inline |
1291 | void lruvec_memcg_debug(struct lruvec *lruvec, struct folio *folio) | |
2d146aa3 JW |
1292 | { |
1293 | } | |
1294 | ||
b910718a JW |
1295 | static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg) |
1296 | { | |
1297 | return NULL; | |
1298 | } | |
1299 | ||
587af308 | 1300 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
c0ff4b85 | 1301 | struct mem_cgroup *memcg) |
bed7161a | 1302 | { |
587af308 | 1303 | return true; |
bed7161a BS |
1304 | } |
1305 | ||
d46eb14b SB |
1306 | static inline struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm) |
1307 | { | |
1308 | return NULL; | |
1309 | } | |
1310 | ||
c74d40e8 DS |
1311 | static inline |
1312 | struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css) | |
1313 | { | |
1314 | return NULL; | |
1315 | } | |
1316 | ||
f4840ccf JW |
1317 | static inline void obj_cgroup_put(struct obj_cgroup *objcg) |
1318 | { | |
1319 | } | |
1320 | ||
e4dde56c YZ |
1321 | static inline bool mem_cgroup_tryget(struct mem_cgroup *memcg) |
1322 | { | |
1323 | return true; | |
1324 | } | |
1325 | ||
dc0b5864 RG |
1326 | static inline void mem_cgroup_put(struct mem_cgroup *memcg) |
1327 | { | |
1328 | } | |
1329 | ||
e809c3fe | 1330 | static inline struct lruvec *folio_lruvec_lock(struct folio *folio) |
6168d0da | 1331 | { |
e809c3fe | 1332 | struct pglist_data *pgdat = folio_pgdat(folio); |
6168d0da AS |
1333 | |
1334 | spin_lock(&pgdat->__lruvec.lru_lock); | |
1335 | return &pgdat->__lruvec; | |
1336 | } | |
1337 | ||
e809c3fe | 1338 | static inline struct lruvec *folio_lruvec_lock_irq(struct folio *folio) |
6168d0da | 1339 | { |
e809c3fe | 1340 | struct pglist_data *pgdat = folio_pgdat(folio); |
6168d0da AS |
1341 | |
1342 | spin_lock_irq(&pgdat->__lruvec.lru_lock); | |
1343 | return &pgdat->__lruvec; | |
1344 | } | |
1345 | ||
e809c3fe | 1346 | static inline struct lruvec *folio_lruvec_lock_irqsave(struct folio *folio, |
6168d0da AS |
1347 | unsigned long *flagsp) |
1348 | { | |
e809c3fe | 1349 | struct pglist_data *pgdat = folio_pgdat(folio); |
6168d0da AS |
1350 | |
1351 | spin_lock_irqsave(&pgdat->__lruvec.lru_lock, *flagsp); | |
1352 | return &pgdat->__lruvec; | |
1353 | } | |
1354 | ||
5660048c JW |
1355 | static inline struct mem_cgroup * |
1356 | mem_cgroup_iter(struct mem_cgroup *root, | |
1357 | struct mem_cgroup *prev, | |
1358 | struct mem_cgroup_reclaim_cookie *reclaim) | |
1359 | { | |
1360 | return NULL; | |
1361 | } | |
1362 | ||
1363 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
1364 | struct mem_cgroup *prev) | |
1365 | { | |
1366 | } | |
1367 | ||
7c5f64f8 VD |
1368 | static inline int mem_cgroup_scan_tasks(struct mem_cgroup *memcg, |
1369 | int (*fn)(struct task_struct *, void *), void *arg) | |
1370 | { | |
1371 | return 0; | |
1372 | } | |
1373 | ||
23047a96 | 1374 | static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg) |
f8d66542 | 1375 | { |
23047a96 JW |
1376 | return 0; |
1377 | } | |
1378 | ||
1379 | static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id) | |
1380 | { | |
1381 | WARN_ON_ONCE(id); | |
1382 | /* XXX: This should always return root_mem_cgroup */ | |
1383 | return NULL; | |
f8d66542 | 1384 | } |
a636b327 | 1385 | |
c15187a4 RG |
1386 | #ifdef CONFIG_SHRINKER_DEBUG |
1387 | static inline unsigned long mem_cgroup_ino(struct mem_cgroup *memcg) | |
1388 | { | |
1389 | return 0; | |
1390 | } | |
1391 | ||
1392 | static inline struct mem_cgroup *mem_cgroup_get_from_ino(unsigned long ino) | |
1393 | { | |
1394 | return NULL; | |
1395 | } | |
1396 | #endif | |
1397 | ||
aa9694bb CD |
1398 | static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m) |
1399 | { | |
1400 | return NULL; | |
1401 | } | |
1402 | ||
2262185c RG |
1403 | static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec) |
1404 | { | |
1405 | return NULL; | |
1406 | } | |
1407 | ||
eb01aaab | 1408 | static inline bool mem_cgroup_online(struct mem_cgroup *memcg) |
14797e23 | 1409 | { |
13308ca9 | 1410 | return true; |
14797e23 KM |
1411 | } |
1412 | ||
b4536f0c MH |
1413 | static inline |
1414 | unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec, | |
1415 | enum lru_list lru, int zone_idx) | |
1416 | { | |
1417 | return 0; | |
1418 | } | |
a3d8e054 | 1419 | |
bbec2e15 | 1420 | static inline unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg) |
7c5f64f8 VD |
1421 | { |
1422 | return 0; | |
1423 | } | |
1424 | ||
9783aa99 CD |
1425 | static inline unsigned long mem_cgroup_size(struct mem_cgroup *memcg) |
1426 | { | |
1427 | return 0; | |
1428 | } | |
1429 | ||
e222432b | 1430 | static inline void |
f0c867d9 | 1431 | mem_cgroup_print_oom_context(struct mem_cgroup *memcg, struct task_struct *p) |
1432 | { | |
1433 | } | |
1434 | ||
1435 | static inline void | |
1436 | mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg) | |
e222432b BS |
1437 | { |
1438 | } | |
1439 | ||
1c824a68 | 1440 | static inline void lock_page_memcg(struct page *page) |
89c06bd5 KH |
1441 | { |
1442 | } | |
1443 | ||
62cccb8c | 1444 | static inline void unlock_page_memcg(struct page *page) |
89c06bd5 KH |
1445 | { |
1446 | } | |
1447 | ||
f70ad448 MWO |
1448 | static inline void folio_memcg_lock(struct folio *folio) |
1449 | { | |
1450 | } | |
1451 | ||
1452 | static inline void folio_memcg_unlock(struct folio *folio) | |
1453 | { | |
1454 | } | |
1455 | ||
018ee47f YZ |
1456 | static inline bool mem_cgroup_trylock_pages(struct mem_cgroup *memcg) |
1457 | { | |
1458 | /* to match folio_memcg_rcu() */ | |
1459 | rcu_read_lock(); | |
1460 | return true; | |
1461 | } | |
1462 | ||
1463 | static inline void mem_cgroup_unlock_pages(void) | |
1464 | { | |
1465 | rcu_read_unlock(); | |
1466 | } | |
1467 | ||
b23afb93 TH |
1468 | static inline void mem_cgroup_handle_over_high(void) |
1469 | { | |
1470 | } | |
1471 | ||
29ef680a | 1472 | static inline void mem_cgroup_enter_user_fault(void) |
519e5247 JW |
1473 | { |
1474 | } | |
1475 | ||
29ef680a | 1476 | static inline void mem_cgroup_exit_user_fault(void) |
519e5247 JW |
1477 | { |
1478 | } | |
1479 | ||
3812c8c8 JW |
1480 | static inline bool task_in_memcg_oom(struct task_struct *p) |
1481 | { | |
1482 | return false; | |
1483 | } | |
1484 | ||
49426420 | 1485 | static inline bool mem_cgroup_oom_synchronize(bool wait) |
3812c8c8 JW |
1486 | { |
1487 | return false; | |
1488 | } | |
1489 | ||
3d8b38eb RG |
1490 | static inline struct mem_cgroup *mem_cgroup_get_oom_group( |
1491 | struct task_struct *victim, struct mem_cgroup *oom_domain) | |
1492 | { | |
1493 | return NULL; | |
1494 | } | |
1495 | ||
1496 | static inline void mem_cgroup_print_oom_group(struct mem_cgroup *memcg) | |
1497 | { | |
1498 | } | |
1499 | ||
00f3ca2c | 1500 | static inline void __mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1501 | int idx, |
00f3ca2c | 1502 | int nr) |
2a2e4885 JW |
1503 | { |
1504 | } | |
1505 | ||
00f3ca2c | 1506 | static inline void mod_memcg_state(struct mem_cgroup *memcg, |
04fecbf5 | 1507 | int idx, |
00f3ca2c | 1508 | int nr) |
2a2e4885 JW |
1509 | { |
1510 | } | |
1511 | ||
4e5aa1f4 SB |
1512 | static inline void mod_memcg_page_state(struct page *page, |
1513 | int idx, int val) | |
1514 | { | |
1515 | } | |
1516 | ||
7490a2d2 SB |
1517 | static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx) |
1518 | { | |
1519 | return 0; | |
1520 | } | |
1521 | ||
42a30035 JW |
1522 | static inline unsigned long lruvec_page_state(struct lruvec *lruvec, |
1523 | enum node_stat_item idx) | |
1524 | { | |
1525 | return node_page_state(lruvec_pgdat(lruvec), idx); | |
1526 | } | |
1527 | ||
205b20cc JW |
1528 | static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, |
1529 | enum node_stat_item idx) | |
2a7106f2 | 1530 | { |
00f3ca2c | 1531 | return node_page_state(lruvec_pgdat(lruvec), idx); |
2a7106f2 GT |
1532 | } |
1533 | ||
aa48e47e SB |
1534 | static inline void mem_cgroup_flush_stats(void) |
1535 | { | |
1536 | } | |
1537 | ||
9b301615 SB |
1538 | static inline void mem_cgroup_flush_stats_delayed(void) |
1539 | { | |
1540 | } | |
1541 | ||
eedc4e5a RG |
1542 | static inline void __mod_memcg_lruvec_state(struct lruvec *lruvec, |
1543 | enum node_stat_item idx, int val) | |
1544 | { | |
1545 | } | |
1546 | ||
da3ceeff | 1547 | static inline void __mod_lruvec_kmem_state(void *p, enum node_stat_item idx, |
ec9f0238 RG |
1548 | int val) |
1549 | { | |
1550 | struct page *page = virt_to_head_page(p); | |
1551 | ||
1552 | __mod_node_page_state(page_pgdat(page), idx, val); | |
1553 | } | |
1554 | ||
da3ceeff | 1555 | static inline void mod_lruvec_kmem_state(void *p, enum node_stat_item idx, |
991e7673 SB |
1556 | int val) |
1557 | { | |
1558 | struct page *page = virt_to_head_page(p); | |
1559 | ||
1560 | mod_node_page_state(page_pgdat(page), idx, val); | |
1561 | } | |
1562 | ||
2262185c RG |
1563 | static inline void count_memcg_events(struct mem_cgroup *memcg, |
1564 | enum vm_event_item idx, | |
1565 | unsigned long count) | |
1566 | { | |
1567 | } | |
1568 | ||
9851ac13 KT |
1569 | static inline void __count_memcg_events(struct mem_cgroup *memcg, |
1570 | enum vm_event_item idx, | |
1571 | unsigned long count) | |
1572 | { | |
1573 | } | |
1574 | ||
2262185c | 1575 | static inline void count_memcg_page_event(struct page *page, |
04fecbf5 | 1576 | int idx) |
2262185c RG |
1577 | { |
1578 | } | |
1579 | ||
64daa5d8 MWO |
1580 | static inline void count_memcg_folio_events(struct folio *folio, |
1581 | enum vm_event_item idx, unsigned long nr) | |
1582 | { | |
1583 | } | |
1584 | ||
456f998e | 1585 | static inline |
2262185c | 1586 | void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx) |
456f998e YH |
1587 | { |
1588 | } | |
6168d0da | 1589 | |
2d146aa3 JW |
1590 | static inline void split_page_memcg(struct page *head, unsigned int nr) |
1591 | { | |
1592 | } | |
1593 | ||
1594 | static inline | |
1595 | unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, | |
1596 | gfp_t gfp_mask, | |
1597 | unsigned long *total_scanned) | |
6168d0da | 1598 | { |
2d146aa3 | 1599 | return 0; |
6168d0da | 1600 | } |
c255a458 | 1601 | #endif /* CONFIG_MEMCG */ |
78fb7466 | 1602 | |
da3ceeff | 1603 | static inline void __inc_lruvec_kmem_state(void *p, enum node_stat_item idx) |
ec9f0238 | 1604 | { |
da3ceeff | 1605 | __mod_lruvec_kmem_state(p, idx, 1); |
ec9f0238 RG |
1606 | } |
1607 | ||
da3ceeff | 1608 | static inline void __dec_lruvec_kmem_state(void *p, enum node_stat_item idx) |
ec9f0238 | 1609 | { |
da3ceeff | 1610 | __mod_lruvec_kmem_state(p, idx, -1); |
ec9f0238 RG |
1611 | } |
1612 | ||
7cf111bc JW |
1613 | static inline struct lruvec *parent_lruvec(struct lruvec *lruvec) |
1614 | { | |
1615 | struct mem_cgroup *memcg; | |
1616 | ||
1617 | memcg = lruvec_memcg(lruvec); | |
1618 | if (!memcg) | |
1619 | return NULL; | |
1620 | memcg = parent_mem_cgroup(memcg); | |
1621 | if (!memcg) | |
1622 | return NULL; | |
1623 | return mem_cgroup_lruvec(memcg, lruvec_pgdat(lruvec)); | |
1624 | } | |
1625 | ||
6168d0da AS |
1626 | static inline void unlock_page_lruvec(struct lruvec *lruvec) |
1627 | { | |
1628 | spin_unlock(&lruvec->lru_lock); | |
1629 | } | |
1630 | ||
1631 | static inline void unlock_page_lruvec_irq(struct lruvec *lruvec) | |
1632 | { | |
1633 | spin_unlock_irq(&lruvec->lru_lock); | |
1634 | } | |
1635 | ||
1636 | static inline void unlock_page_lruvec_irqrestore(struct lruvec *lruvec, | |
1637 | unsigned long flags) | |
1638 | { | |
1639 | spin_unlock_irqrestore(&lruvec->lru_lock, flags); | |
1640 | } | |
1641 | ||
7467c391 | 1642 | /* Test requires a stable page->memcg binding, see page_memcg() */ |
0de340cb MWO |
1643 | static inline bool folio_matches_lruvec(struct folio *folio, |
1644 | struct lruvec *lruvec) | |
f2e4d28d | 1645 | { |
0de340cb MWO |
1646 | return lruvec_pgdat(lruvec) == folio_pgdat(folio) && |
1647 | lruvec_memcg(lruvec) == folio_memcg(folio); | |
f2e4d28d MS |
1648 | } |
1649 | ||
2a5e4e34 | 1650 | /* Don't lock again iff page's lruvec locked */ |
0de340cb | 1651 | static inline struct lruvec *folio_lruvec_relock_irq(struct folio *folio, |
2a5e4e34 AD |
1652 | struct lruvec *locked_lruvec) |
1653 | { | |
1654 | if (locked_lruvec) { | |
0de340cb | 1655 | if (folio_matches_lruvec(folio, locked_lruvec)) |
2a5e4e34 AD |
1656 | return locked_lruvec; |
1657 | ||
1658 | unlock_page_lruvec_irq(locked_lruvec); | |
1659 | } | |
1660 | ||
e809c3fe | 1661 | return folio_lruvec_lock_irq(folio); |
2a5e4e34 AD |
1662 | } |
1663 | ||
1664 | /* Don't lock again iff page's lruvec locked */ | |
0de340cb | 1665 | static inline struct lruvec *folio_lruvec_relock_irqsave(struct folio *folio, |
2a5e4e34 AD |
1666 | struct lruvec *locked_lruvec, unsigned long *flags) |
1667 | { | |
1668 | if (locked_lruvec) { | |
0de340cb | 1669 | if (folio_matches_lruvec(folio, locked_lruvec)) |
2a5e4e34 AD |
1670 | return locked_lruvec; |
1671 | ||
1672 | unlock_page_lruvec_irqrestore(locked_lruvec, *flags); | |
1673 | } | |
1674 | ||
e809c3fe | 1675 | return folio_lruvec_lock_irqsave(folio, flags); |
2a5e4e34 AD |
1676 | } |
1677 | ||
52ebea74 | 1678 | #ifdef CONFIG_CGROUP_WRITEBACK |
841710aa | 1679 | |
841710aa | 1680 | struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb); |
c5edf9cd TH |
1681 | void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages, |
1682 | unsigned long *pheadroom, unsigned long *pdirty, | |
1683 | unsigned long *pwriteback); | |
841710aa | 1684 | |
9d8053fc | 1685 | void mem_cgroup_track_foreign_dirty_slowpath(struct folio *folio, |
97b27821 TH |
1686 | struct bdi_writeback *wb); |
1687 | ||
203a3151 | 1688 | static inline void mem_cgroup_track_foreign_dirty(struct folio *folio, |
97b27821 TH |
1689 | struct bdi_writeback *wb) |
1690 | { | |
ac86f547 KW |
1691 | struct mem_cgroup *memcg; |
1692 | ||
08d1d0e6 BH |
1693 | if (mem_cgroup_disabled()) |
1694 | return; | |
1695 | ||
ac86f547 KW |
1696 | memcg = folio_memcg(folio); |
1697 | if (unlikely(memcg && &memcg->css != wb->memcg_css)) | |
9d8053fc | 1698 | mem_cgroup_track_foreign_dirty_slowpath(folio, wb); |
97b27821 TH |
1699 | } |
1700 | ||
1701 | void mem_cgroup_flush_foreign(struct bdi_writeback *wb); | |
1702 | ||
841710aa TH |
1703 | #else /* CONFIG_CGROUP_WRITEBACK */ |
1704 | ||
1705 | static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb) | |
1706 | { | |
1707 | return NULL; | |
1708 | } | |
1709 | ||
c2aa723a | 1710 | static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb, |
c5edf9cd TH |
1711 | unsigned long *pfilepages, |
1712 | unsigned long *pheadroom, | |
c2aa723a TH |
1713 | unsigned long *pdirty, |
1714 | unsigned long *pwriteback) | |
1715 | { | |
1716 | } | |
1717 | ||
203a3151 | 1718 | static inline void mem_cgroup_track_foreign_dirty(struct folio *folio, |
97b27821 TH |
1719 | struct bdi_writeback *wb) |
1720 | { | |
1721 | } | |
1722 | ||
1723 | static inline void mem_cgroup_flush_foreign(struct bdi_writeback *wb) | |
1724 | { | |
1725 | } | |
1726 | ||
841710aa | 1727 | #endif /* CONFIG_CGROUP_WRITEBACK */ |
52ebea74 | 1728 | |
e1aab161 | 1729 | struct sock; |
4b1327be WW |
1730 | bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages, |
1731 | gfp_t gfp_mask); | |
baac50bb | 1732 | void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages); |
d886f4e4 | 1733 | #ifdef CONFIG_MEMCG |
ef12947c JW |
1734 | extern struct static_key_false memcg_sockets_enabled_key; |
1735 | #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key) | |
2d758073 JW |
1736 | void mem_cgroup_sk_alloc(struct sock *sk); |
1737 | void mem_cgroup_sk_free(struct sock *sk); | |
baac50bb | 1738 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c | 1739 | { |
0db15298 | 1740 | if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && memcg->tcpmem_pressure) |
8e8ae645 | 1741 | return true; |
8e8ae645 | 1742 | do { |
7e6ec49c | 1743 | if (time_before(jiffies, READ_ONCE(memcg->socket_pressure))) |
8e8ae645 JW |
1744 | return true; |
1745 | } while ((memcg = parent_mem_cgroup(memcg))); | |
1746 | return false; | |
e805605c | 1747 | } |
0a432dcb | 1748 | |
e4262c4f YS |
1749 | int alloc_shrinker_info(struct mem_cgroup *memcg); |
1750 | void free_shrinker_info(struct mem_cgroup *memcg); | |
2bfd3637 | 1751 | void set_shrinker_bit(struct mem_cgroup *memcg, int nid, int shrinker_id); |
a178015c | 1752 | void reparent_shrinker_deferred(struct mem_cgroup *memcg); |
e805605c | 1753 | #else |
80e95fe0 | 1754 | #define mem_cgroup_sockets_enabled 0 |
2d758073 JW |
1755 | static inline void mem_cgroup_sk_alloc(struct sock *sk) { }; |
1756 | static inline void mem_cgroup_sk_free(struct sock *sk) { }; | |
baac50bb | 1757 | static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) |
e805605c JW |
1758 | { |
1759 | return false; | |
1760 | } | |
0a432dcb | 1761 | |
2bfd3637 YS |
1762 | static inline void set_shrinker_bit(struct mem_cgroup *memcg, |
1763 | int nid, int shrinker_id) | |
0a432dcb YS |
1764 | { |
1765 | } | |
e805605c | 1766 | #endif |
7ae1e1d0 | 1767 | |
9b6f7e16 | 1768 | #ifdef CONFIG_MEMCG_KMEM |
4d5c8aed | 1769 | bool mem_cgroup_kmem_disabled(void); |
f4b00eab RG |
1770 | int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, int order); |
1771 | void __memcg_kmem_uncharge_page(struct page *page, int order); | |
45264778 | 1772 | |
bf4f0599 | 1773 | struct obj_cgroup *get_obj_cgroup_from_current(void); |
f4840ccf | 1774 | struct obj_cgroup *get_obj_cgroup_from_page(struct page *page); |
bf4f0599 RG |
1775 | |
1776 | int obj_cgroup_charge(struct obj_cgroup *objcg, gfp_t gfp, size_t size); | |
1777 | void obj_cgroup_uncharge(struct obj_cgroup *objcg, size_t size); | |
1778 | ||
ef12947c | 1779 | extern struct static_key_false memcg_kmem_enabled_key; |
749c5415 | 1780 | |
7ae1e1d0 GC |
1781 | static inline bool memcg_kmem_enabled(void) |
1782 | { | |
eda330e5 | 1783 | return static_branch_likely(&memcg_kmem_enabled_key); |
7ae1e1d0 GC |
1784 | } |
1785 | ||
f4b00eab RG |
1786 | static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1787 | int order) | |
60cd4bcd SB |
1788 | { |
1789 | if (memcg_kmem_enabled()) | |
f4b00eab | 1790 | return __memcg_kmem_charge_page(page, gfp, order); |
60cd4bcd SB |
1791 | return 0; |
1792 | } | |
1793 | ||
f4b00eab | 1794 | static inline void memcg_kmem_uncharge_page(struct page *page, int order) |
60cd4bcd SB |
1795 | { |
1796 | if (memcg_kmem_enabled()) | |
f4b00eab | 1797 | __memcg_kmem_uncharge_page(page, order); |
60cd4bcd SB |
1798 | } |
1799 | ||
33398cf2 | 1800 | /* |
a7cb874b RG |
1801 | * A helper for accessing memcg's kmem_id, used for getting |
1802 | * corresponding LRU lists. | |
33398cf2 | 1803 | */ |
7c52f65d | 1804 | static inline int memcg_kmem_id(struct mem_cgroup *memcg) |
33398cf2 MH |
1805 | { |
1806 | return memcg ? memcg->kmemcg_id : -1; | |
1807 | } | |
5722d094 | 1808 | |
8380ce47 | 1809 | struct mem_cgroup *mem_cgroup_from_obj(void *p); |
fc4db90f | 1810 | struct mem_cgroup *mem_cgroup_from_slab_obj(void *p); |
8380ce47 | 1811 | |
f4840ccf JW |
1812 | static inline void count_objcg_event(struct obj_cgroup *objcg, |
1813 | enum vm_event_item idx) | |
1814 | { | |
1815 | struct mem_cgroup *memcg; | |
1816 | ||
2eb98919 | 1817 | if (!memcg_kmem_enabled()) |
f4840ccf JW |
1818 | return; |
1819 | ||
1820 | rcu_read_lock(); | |
1821 | memcg = obj_cgroup_memcg(objcg); | |
1822 | count_memcg_events(memcg, idx, 1); | |
1823 | rcu_read_unlock(); | |
1824 | } | |
1825 | ||
7ae1e1d0 | 1826 | #else |
4d5c8aed RG |
1827 | static inline bool mem_cgroup_kmem_disabled(void) |
1828 | { | |
1829 | return true; | |
1830 | } | |
9b6f7e16 | 1831 | |
f4b00eab RG |
1832 | static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1833 | int order) | |
9b6f7e16 RG |
1834 | { |
1835 | return 0; | |
1836 | } | |
1837 | ||
f4b00eab | 1838 | static inline void memcg_kmem_uncharge_page(struct page *page, int order) |
9b6f7e16 RG |
1839 | { |
1840 | } | |
1841 | ||
f4b00eab RG |
1842 | static inline int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, |
1843 | int order) | |
60cd4bcd SB |
1844 | { |
1845 | return 0; | |
1846 | } | |
1847 | ||
f4b00eab | 1848 | static inline void __memcg_kmem_uncharge_page(struct page *page, int order) |
60cd4bcd SB |
1849 | { |
1850 | } | |
1851 | ||
f4840ccf JW |
1852 | static inline struct obj_cgroup *get_obj_cgroup_from_page(struct page *page) |
1853 | { | |
1854 | return NULL; | |
1855 | } | |
1856 | ||
b9ce5ef4 GC |
1857 | static inline bool memcg_kmem_enabled(void) |
1858 | { | |
1859 | return false; | |
1860 | } | |
1861 | ||
7c52f65d | 1862 | static inline int memcg_kmem_id(struct mem_cgroup *memcg) |
2633d7a0 GC |
1863 | { |
1864 | return -1; | |
1865 | } | |
1866 | ||
8380ce47 RG |
1867 | static inline struct mem_cgroup *mem_cgroup_from_obj(void *p) |
1868 | { | |
1d0403d2 | 1869 | return NULL; |
8380ce47 RG |
1870 | } |
1871 | ||
fc4db90f RG |
1872 | static inline struct mem_cgroup *mem_cgroup_from_slab_obj(void *p) |
1873 | { | |
1874 | return NULL; | |
1875 | } | |
1876 | ||
f4840ccf JW |
1877 | static inline void count_objcg_event(struct obj_cgroup *objcg, |
1878 | enum vm_event_item idx) | |
1879 | { | |
1880 | } | |
1881 | ||
84c07d11 | 1882 | #endif /* CONFIG_MEMCG_KMEM */ |
127424c8 | 1883 | |
f4840ccf JW |
1884 | #if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_ZSWAP) |
1885 | bool obj_cgroup_may_zswap(struct obj_cgroup *objcg); | |
1886 | void obj_cgroup_charge_zswap(struct obj_cgroup *objcg, size_t size); | |
1887 | void obj_cgroup_uncharge_zswap(struct obj_cgroup *objcg, size_t size); | |
1888 | #else | |
1889 | static inline bool obj_cgroup_may_zswap(struct obj_cgroup *objcg) | |
1890 | { | |
1891 | return true; | |
1892 | } | |
1893 | static inline void obj_cgroup_charge_zswap(struct obj_cgroup *objcg, | |
1894 | size_t size) | |
1895 | { | |
1896 | } | |
1897 | static inline void obj_cgroup_uncharge_zswap(struct obj_cgroup *objcg, | |
1898 | size_t size) | |
1899 | { | |
1900 | } | |
1901 | #endif | |
1902 | ||
8cdea7c0 | 1903 | #endif /* _LINUX_MEMCONTROL_H */ |