include/linux/memcontrol.h

   1 /* memcontrol.h - Memory Controller
   2  *
   3  * Copyright IBM Corporation, 2007
   4  * Author Balbir Singh <balbir@linux.vnet.ibm.com>
   5  *
   6  * Copyright 2007 OpenVZ SWsoft Inc
   7  * Author: Pavel Emelianov <xemul@openvz.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  */
  19
  20 #ifndef _LINUX_MEMCONTROL_H
  21 #define _LINUX_MEMCONTROL_H
  22 #include <linux/cgroup.h>
  23 #include <linux/vm_event_item.h>
  24 #include <linux/hardirq.h>
  25 #include <linux/jump_label.h>
  26
  27 struct mem_cgroup;
  28 struct page_cgroup;
  29 struct page;
  30 struct mm_struct;
  31 struct kmem_cache;
  32
  33 /* Stats that can be updated by kernel. */
  34 enum mem_cgroup_page_stat_item {
  35         MEMCG_NR_FILE_MAPPED, /* # of pages charged as file rss */
  36 };
  37
  38 struct mem_cgroup_reclaim_cookie {
  39         struct zone *zone;
  40         int priority;
  41         unsigned int generation;
  42 };
  43
  44 #ifdef CONFIG_MEMCG
  45 /*
  46  * All "charge" functions with gfp_mask should use GFP_KERNEL or
  47  * (gfp_mask & GFP_RECLAIM_MASK). In current implementatin, memcg doesn't
  48  * alloc memory but reclaims memory from all available zones. So, "where I want
  49  * memory from" bits of gfp_mask has no meaning. So any bits of that field is
  50  * available but adding a rule is better. charge functions' gfp_mask should
  51  * be set to GFP_KERNEL or gfp_mask & GFP_RECLAIM_MASK for avoiding ambiguous
  52  * codes.
  53  * (Of course, if memcg does memory allocation in future, GFP_KERNEL is sane.)
  54  */
  55
  56 extern int mem_cgroup_newpage_charge(struct page *page, struct mm_struct *mm,
  57                                 gfp_t gfp_mask);
  58 /* for swap handling */
  59 extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
  60                 struct page *page, gfp_t mask, struct mem_cgroup **memcgp);
  61 extern void mem_cgroup_commit_charge_swapin(struct page *page,
  62                                         struct mem_cgroup *memcg);
  63 extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *memcg);
  64
  65 extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
  66                                         gfp_t gfp_mask);
  67
  68 struct lruvec *mem_cgroup_zone_lruvec(struct zone *, struct mem_cgroup *);
  69 struct lruvec *mem_cgroup_page_lruvec(struct page *, struct zone *);
  70
  71 /* For coalescing uncharge for reducing memcg' overhead*/
  72 extern void mem_cgroup_uncharge_start(void);
  73 extern void mem_cgroup_uncharge_end(void);
  74
  75 extern void mem_cgroup_uncharge_page(struct page *page);
  76 extern void mem_cgroup_uncharge_cache_page(struct page *page);
  77
  78 bool __mem_cgroup_same_or_subtree(const struct mem_cgroup *root_memcg,
  79                                   struct mem_cgroup *memcg);
  80 int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *memcg);
  81
  82 extern struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page);
  83 extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
  84 extern struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm);
  85
  86 extern struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg);
  87 extern struct mem_cgroup *mem_cgroup_from_cont(struct cgroup *cont);
  88
  89 static inline
  90 bool mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *memcg)
  91 {
  92         struct mem_cgroup *task_memcg;
  93         bool match;
  94
  95         rcu_read_lock();
  96         task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
  97         match = __mem_cgroup_same_or_subtree(memcg, task_memcg);
  98         rcu_read_unlock();
  99         return match;
 100 }
 101
 102 extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *memcg);
 103
 104 extern void
 105 mem_cgroup_prepare_migration(struct page *page, struct page *newpage,
 106                              struct mem_cgroup **memcgp);
 107 extern void mem_cgroup_end_migration(struct mem_cgroup *memcg,
 108         struct page *oldpage, struct page *newpage, bool migration_ok);
 109
 110 struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *,
 111                                    struct mem_cgroup *,
 112                                    struct mem_cgroup_reclaim_cookie *);
 113 void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *);
 114
 115 /*
 116  * For memory reclaim.
 117  */
 118 int mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec);
 119 int mem_cgroup_select_victim_node(struct mem_cgroup *memcg);
 120 unsigned long mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list);
 121 void mem_cgroup_update_lru_size(struct lruvec *, enum lru_list, int);
 122 extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg,
 123                                         struct task_struct *p);
 124 extern void mem_cgroup_replace_page_cache(struct page *oldpage,
 125                                         struct page *newpage);
 126
 127 static inline void mem_cgroup_oom_enable(void)
 128 {
 129         WARN_ON(current->memcg_oom.may_oom);
 130         current->memcg_oom.may_oom = 1;
 131 }
 132
 133 static inline void mem_cgroup_oom_disable(void)
 134 {
 135         WARN_ON(!current->memcg_oom.may_oom);
 136         current->memcg_oom.may_oom = 0;
 137 }
 138
 139 static inline bool task_in_memcg_oom(struct task_struct *p)
 140 {
 141         return p->memcg_oom.memcg;
 142 }
 143
 144 bool mem_cgroup_oom_synchronize(bool wait);
 145
 146 #ifdef CONFIG_MEMCG_SWAP
 147 extern int do_swap_account;
 148 #endif
 149
 150 static inline bool mem_cgroup_disabled(void)
 151 {
 152         if (mem_cgroup_subsys.disabled)
 153                 return true;
 154         return false;
 155 }
 156
 157 void __mem_cgroup_begin_update_page_stat(struct page *page, bool *locked,
 158                                          unsigned long *flags);
 159
 160 extern atomic_t memcg_moving;
 161
 162 static inline void mem_cgroup_begin_update_page_stat(struct page *page,
 163                                         bool *locked, unsigned long *flags)
 164 {
 165         if (mem_cgroup_disabled())
 166                 return;
 167         rcu_read_lock();
 168         *locked = false;
 169         if (atomic_read(&memcg_moving))
 170                 __mem_cgroup_begin_update_page_stat(page, locked, flags);
 171 }
 172
 173 void __mem_cgroup_end_update_page_stat(struct page *page,
 174                                 unsigned long *flags);
 175 static inline void mem_cgroup_end_update_page_stat(struct page *page,
 176                                         bool *locked, unsigned long *flags)
 177 {
 178         if (mem_cgroup_disabled())
 179                 return;
 180         if (*locked)
 181                 __mem_cgroup_end_update_page_stat(page, flags);
 182         rcu_read_unlock();
 183 }
 184
 185 void mem_cgroup_update_page_stat(struct page *page,
 186                                  enum mem_cgroup_page_stat_item idx,
 187                                  int val);
 188
 189 static inline void mem_cgroup_inc_page_stat(struct page *page,
 190                                             enum mem_cgroup_page_stat_item idx)
 191 {
 192         mem_cgroup_update_page_stat(page, idx, 1);
 193 }
 194
 195 static inline void mem_cgroup_dec_page_stat(struct page *page,
 196                                             enum mem_cgroup_page_stat_item idx)
 197 {
 198         mem_cgroup_update_page_stat(page, idx, -1);
 199 }
 200
 201 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
 202                                                 gfp_t gfp_mask,
 203                                                 unsigned long *total_scanned);
 204
 205 void __mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx);
 206 static inline void mem_cgroup_count_vm_event(struct mm_struct *mm,
 207                                              enum vm_event_item idx)
 208 {
 209         if (mem_cgroup_disabled())
 210                 return;
 211         __mem_cgroup_count_vm_event(mm, idx);
 212 }
 213 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 214 void mem_cgroup_split_huge_fixup(struct page *head);
 215 #endif
 216
 217 #ifdef CONFIG_DEBUG_VM
 218 bool mem_cgroup_bad_page_check(struct page *page);
 219 void mem_cgroup_print_bad_page(struct page *page);
 220 #endif
 221 #else /* CONFIG_MEMCG */
 222 struct mem_cgroup;
 223
 224 static inline int mem_cgroup_newpage_charge(struct page *page,
 225                                         struct mm_struct *mm, gfp_t gfp_mask)
 226 {
 227         return 0;
 228 }
 229
 230 static inline int mem_cgroup_cache_charge(struct page *page,
 231                                         struct mm_struct *mm, gfp_t gfp_mask)
 232 {
 233         return 0;
 234 }
 235
 236 static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
 237                 struct page *page, gfp_t gfp_mask, struct mem_cgroup **memcgp)
 238 {
 239         return 0;
 240 }
 241
 242 static inline void mem_cgroup_commit_charge_swapin(struct page *page,
 243                                           struct mem_cgroup *memcg)
 244 {
 245 }
 246
 247 static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *memcg)
 248 {
 249 }
 250
 251 static inline void mem_cgroup_uncharge_start(void)
 252 {
 253 }
 254
 255 static inline void mem_cgroup_uncharge_end(void)
 256 {
 257 }
 258
 259 static inline void mem_cgroup_uncharge_page(struct page *page)
 260 {
 261 }
 262
 263 static inline void mem_cgroup_uncharge_cache_page(struct page *page)
 264 {
 265 }
 266
 267 static inline struct lruvec *mem_cgroup_zone_lruvec(struct zone *zone,
 268                                                     struct mem_cgroup *memcg)
 269 {
 270         return &zone->lruvec;
 271 }
 272
 273 static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page,
 274                                                     struct zone *zone)
 275 {
 276         return &zone->lruvec;
 277 }
 278
 279 static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page)
 280 {
 281         return NULL;
 282 }
 283
 284 static inline struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm)
 285 {
 286         return NULL;
 287 }
 288
 289 static inline bool mm_match_cgroup(struct mm_struct *mm,
 290                 struct mem_cgroup *memcg)
 291 {
 292         return true;
 293 }
 294
 295 static inline int task_in_mem_cgroup(struct task_struct *task,
 296                                      const struct mem_cgroup *memcg)
 297 {
 298         return 1;
 299 }
 300
 301 static inline struct cgroup_subsys_state
 302                 *mem_cgroup_css(struct mem_cgroup *memcg)
 303 {
 304         return NULL;
 305 }
 306
 307 static inline void
 308 mem_cgroup_prepare_migration(struct page *page, struct page *newpage,
 309                              struct mem_cgroup **memcgp)
 310 {
 311 }
 312
 313 static inline void mem_cgroup_end_migration(struct mem_cgroup *memcg,
 314                 struct page *oldpage, struct page *newpage, bool migration_ok)
 315 {
 316 }
 317
 318 static inline struct mem_cgroup *
 319 mem_cgroup_iter(struct mem_cgroup *root,
 320                 struct mem_cgroup *prev,
 321                 struct mem_cgroup_reclaim_cookie *reclaim)
 322 {
 323         return NULL;
 324 }
 325
 326 static inline void mem_cgroup_iter_break(struct mem_cgroup *root,
 327                                          struct mem_cgroup *prev)
 328 {
 329 }
 330
 331 static inline bool mem_cgroup_disabled(void)
 332 {
 333         return true;
 334 }
 335
 336 static inline int
 337 mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec)
 338 {
 339         return 1;
 340 }
 341
 342 static inline unsigned long
 343 mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru)
 344 {
 345         return 0;
 346 }
 347
 348 static inline void
 349 mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru,
 350                               int increment)
 351 {
 352 }
 353
 354 static inline void
 355 mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
 356 {
 357 }
 358
 359 static inline void mem_cgroup_begin_update_page_stat(struct page *page,
 360                                         bool *locked, unsigned long *flags)
 361 {
 362 }
 363
 364 static inline void mem_cgroup_end_update_page_stat(struct page *page,
 365                                         bool *locked, unsigned long *flags)
 366 {
 367 }
 368
 369 static inline void mem_cgroup_oom_enable(void)
 370 {
 371 }
 372
 373 static inline void mem_cgroup_oom_disable(void)
 374 {
 375 }
 376
 377 static inline bool task_in_memcg_oom(struct task_struct *p)
 378 {
 379         return false;
 380 }
 381
 382 static inline bool mem_cgroup_oom_synchronize(bool wait)
 383 {
 384         return false;
 385 }
 386
 387 static inline void mem_cgroup_inc_page_stat(struct page *page,
 388                                             enum mem_cgroup_page_stat_item idx)
 389 {
 390 }
 391
 392 static inline void mem_cgroup_dec_page_stat(struct page *page,
 393                                             enum mem_cgroup_page_stat_item idx)
 394 {
 395 }
 396
 397 static inline
 398 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
 399                                             gfp_t gfp_mask,
 400                                             unsigned long *total_scanned)
 401 {
 402         return 0;
 403 }
 404
 405 static inline void mem_cgroup_split_huge_fixup(struct page *head)
 406 {
 407 }
 408
 409 static inline
 410 void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx)
 411 {
 412 }
 413 static inline void mem_cgroup_replace_page_cache(struct page *oldpage,
 414                                 struct page *newpage)
 415 {
 416 }
 417 #endif /* CONFIG_MEMCG */
 418
 419 #if !defined(CONFIG_MEMCG) || !defined(CONFIG_DEBUG_VM)
 420 static inline bool
 421 mem_cgroup_bad_page_check(struct page *page)
 422 {
 423         return false;
 424 }
 425
 426 static inline void
 427 mem_cgroup_print_bad_page(struct page *page)
 428 {
 429 }
 430 #endif
 431
 432 enum {
 433         UNDER_LIMIT,
 434         SOFT_LIMIT,
 435         OVER_LIMIT,
 436 };
 437
 438 struct sock;
 439 #if defined(CONFIG_INET) && defined(CONFIG_MEMCG_KMEM)
 440 void sock_update_memcg(struct sock *sk);
 441 void sock_release_memcg(struct sock *sk);
 442 #else
 443 static inline void sock_update_memcg(struct sock *sk)
 444 {
 445 }
 446 static inline void sock_release_memcg(struct sock *sk)
 447 {
 448 }
 449 #endif /* CONFIG_INET && CONFIG_MEMCG_KMEM */
 450
 451 #ifdef CONFIG_MEMCG_KMEM
 452 extern struct static_key memcg_kmem_enabled_key;
 453
 454 extern int memcg_limited_groups_array_size;
 455
 456 /*
 457  * Helper macro to loop through all memcg-specific caches. Callers must still
 458  * check if the cache is valid (it is either valid or NULL).
 459  * the slab_mutex must be held when looping through those caches
 460  */
 461 #define for_each_memcg_cache_index(_idx)        \
 462         for ((_idx) = 0; (_idx) < memcg_limited_groups_array_size; (_idx)++)
 463
 464 static inline bool memcg_kmem_enabled(void)
 465 {
 466         return static_key_false(&memcg_kmem_enabled_key);
 467 }
 468
 469 /*
 470  * In general, we'll do everything in our power to not incur in any overhead
 471  * for non-memcg users for the kmem functions. Not even a function call, if we
 472  * can avoid it.
 473  *
 474  * Therefore, we'll inline all those functions so that in the best case, we'll
 475  * see that kmemcg is off for everybody and proceed quickly.  If it is on,
 476  * we'll still do most of the flag checking inline. We check a lot of
 477  * conditions, but because they are pretty simple, they are expected to be
 478  * fast.
 479  */
 480 bool __memcg_kmem_newpage_charge(gfp_t gfp, struct mem_cgroup **memcg,
 481                                         int order);
 482 void __memcg_kmem_commit_charge(struct page *page,
 483                                        struct mem_cgroup *memcg, int order);
 484 void __memcg_kmem_uncharge_pages(struct page *page, int order);
 485
 486 int memcg_cache_id(struct mem_cgroup *memcg);
 487 int memcg_register_cache(struct mem_cgroup *memcg, struct kmem_cache *s,
 488                          struct kmem_cache *root_cache);
 489 void memcg_release_cache(struct kmem_cache *cachep);
 490 void memcg_cache_list_add(struct mem_cgroup *memcg, struct kmem_cache *cachep);
 491
 492 int memcg_update_cache_size(struct kmem_cache *s, int num_groups);
 493 void memcg_update_array_size(int num_groups);
 494
 495 struct kmem_cache *
 496 __memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp);
 497
 498 void mem_cgroup_destroy_cache(struct kmem_cache *cachep);
 499 void kmem_cache_destroy_memcg_children(struct kmem_cache *s);
 500
 501 /**
 502  * memcg_kmem_newpage_charge: verify if a new kmem allocation is allowed.
 503  * @gfp: the gfp allocation flags.
 504  * @memcg: a pointer to the memcg this was charged against.
 505  * @order: allocation order.
 506  *
 507  * returns true if the memcg where the current task belongs can hold this
 508  * allocation.
 509  *
 510  * We return true automatically if this allocation is not to be accounted to
 511  * any memcg.
 512  */
 513 static inline bool
 514 memcg_kmem_newpage_charge(gfp_t gfp, struct mem_cgroup **memcg, int order)
 515 {
 516         if (!memcg_kmem_enabled())
 517                 return true;
 518
 519         /*
 520          * __GFP_NOFAIL allocations will move on even if charging is not
 521          * possible. Therefore we don't even try, and have this allocation
 522          * unaccounted. We could in theory charge it with
 523          * res_counter_charge_nofail, but we hope those allocations are rare,
 524          * and won't be worth the trouble.
 525          */
 526         if (!(gfp & __GFP_KMEMCG) || (gfp & __GFP_NOFAIL))
 527                 return true;
 528         if (in_interrupt() || (!current->mm) || (current->flags & PF_KTHREAD))
 529                 return true;
 530
 531         /* If the test is dying, just let it go. */
 532         if (unlikely(fatal_signal_pending(current)))
 533                 return true;
 534
 535         return __memcg_kmem_newpage_charge(gfp, memcg, order);
 536 }
 537
 538 /**
 539  * memcg_kmem_uncharge_pages: uncharge pages from memcg
 540  * @page: pointer to struct page being freed
 541  * @order: allocation order.
 542  *
 543  * there is no need to specify memcg here, since it is embedded in page_cgroup
 544  */
 545 static inline void
 546 memcg_kmem_uncharge_pages(struct page *page, int order)
 547 {
 548         if (memcg_kmem_enabled())
 549                 __memcg_kmem_uncharge_pages(page, order);
 550 }
 551
 552 /**
 553  * memcg_kmem_commit_charge: embeds correct memcg in a page
 554  * @page: pointer to struct page recently allocated
 555  * @memcg: the memcg structure we charged against
 556  * @order: allocation order.
 557  *
 558  * Needs to be called after memcg_kmem_newpage_charge, regardless of success or
 559  * failure of the allocation. if @page is NULL, this function will revert the
 560  * charges. Otherwise, it will commit the memcg given by @memcg to the
 561  * corresponding page_cgroup.
 562  */
 563 static inline void
 564 memcg_kmem_commit_charge(struct page *page, struct mem_cgroup *memcg, int order)
 565 {
 566         if (memcg_kmem_enabled() && memcg)
 567                 __memcg_kmem_commit_charge(page, memcg, order);
 568 }
 569
 570 /**
 571  * memcg_kmem_get_cache: selects the correct per-memcg cache for allocation
 572  * @cachep: the original global kmem cache
 573  * @gfp: allocation flags.
 574  *
 575  * This function assumes that the task allocating, which determines the memcg
 576  * in the page allocator, belongs to the same cgroup throughout the whole
 577  * process.  Misacounting can happen if the task calls memcg_kmem_get_cache()
 578  * while belonging to a cgroup, and later on changes. This is considered
 579  * acceptable, and should only happen upon task migration.
 580  *
 581  * Before the cache is created by the memcg core, there is also a possible
 582  * imbalance: the task belongs to a memcg, but the cache being allocated from
 583  * is the global cache, since the child cache is not yet guaranteed to be
 584  * ready. This case is also fine, since in this case the GFP_KMEMCG will not be
 585  * passed and the page allocator will not attempt any cgroup accounting.
 586  */
 587 static __always_inline struct kmem_cache *
 588 memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp)
 589 {
 590         if (!memcg_kmem_enabled())
 591                 return cachep;
 592         if (gfp & __GFP_NOFAIL)
 593                 return cachep;
 594         if (in_interrupt() || (!current->mm) || (current->flags & PF_KTHREAD))
 595                 return cachep;
 596         if (unlikely(fatal_signal_pending(current)))
 597                 return cachep;
 598
 599         return __memcg_kmem_get_cache(cachep, gfp);
 600 }
 601 #else
 602 #define for_each_memcg_cache_index(_idx)        \
 603         for (; NULL; )
 604
 605 static inline bool memcg_kmem_enabled(void)
 606 {
 607         return false;
 608 }
 609
 610 static inline bool
 611 memcg_kmem_newpage_charge(gfp_t gfp, struct mem_cgroup **memcg, int order)
 612 {
 613         return true;
 614 }
 615
 616 static inline void memcg_kmem_uncharge_pages(struct page *page, int order)
 617 {
 618 }
 619
 620 static inline void
 621 memcg_kmem_commit_charge(struct page *page, struct mem_cgroup *memcg, int order)
 622 {
 623 }
 624
 625 static inline int memcg_cache_id(struct mem_cgroup *memcg)
 626 {
 627         return -1;
 628 }
 629
 630 static inline int
 631 memcg_register_cache(struct mem_cgroup *memcg, struct kmem_cache *s,
 632                      struct kmem_cache *root_cache)
 633 {
 634         return 0;
 635 }
 636
 637 static inline void memcg_release_cache(struct kmem_cache *cachep)
 638 {
 639 }
 640
 641 static inline void memcg_cache_list_add(struct mem_cgroup *memcg,
 642                                         struct kmem_cache *s)
 643 {
 644 }
 645
 646 static inline struct kmem_cache *
 647 memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp)
 648 {
 649         return cachep;
 650 }
 651
 652 static inline void kmem_cache_destroy_memcg_children(struct kmem_cache *s)
 653 {
 654 }
 655 #endif /* CONFIG_MEMCG_KMEM */
 656 #endif /* _LINUX_MEMCONTROL_H */
 657