memcontrol.h 6.0 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233
  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. #ifndef _LINUX_MEMCONTROL_H
  20. #define _LINUX_MEMCONTROL_H
  21. #include <linux/cgroup.h>
  22. struct mem_cgroup;
  23. struct page_cgroup;
  24. struct page;
  25. struct mm_struct;
  26. #ifdef CONFIG_CGROUP_MEM_RES_CTLR
  27. extern int mem_cgroup_newpage_charge(struct page *page, struct mm_struct *mm,
  28. gfp_t gfp_mask);
  29. /* for swap handling */
  30. extern int mem_cgroup_try_charge(struct mm_struct *mm,
  31. gfp_t gfp_mask, struct mem_cgroup **ptr);
  32. extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
  33. struct page *page, gfp_t mask, struct mem_cgroup **ptr);
  34. extern void mem_cgroup_commit_charge_swapin(struct page *page,
  35. struct mem_cgroup *ptr);
  36. extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr);
  37. extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
  38. gfp_t gfp_mask);
  39. extern void mem_cgroup_add_lru_list(struct page *page, enum lru_list lru);
  40. extern void mem_cgroup_del_lru_list(struct page *page, enum lru_list lru);
  41. extern void mem_cgroup_rotate_lru_list(struct page *page, enum lru_list lru);
  42. extern void mem_cgroup_del_lru(struct page *page);
  43. extern void mem_cgroup_move_lists(struct page *page,
  44. enum lru_list from, enum lru_list to);
  45. extern void mem_cgroup_uncharge_page(struct page *page);
  46. extern void mem_cgroup_uncharge_cache_page(struct page *page);
  47. extern int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask);
  48. extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
  49. struct list_head *dst,
  50. unsigned long *scanned, int order,
  51. int mode, struct zone *z,
  52. struct mem_cgroup *mem_cont,
  53. int active, int file);
  54. extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
  55. int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
  56. extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
  57. #define mm_match_cgroup(mm, cgroup) \
  58. ((cgroup) == mem_cgroup_from_task((mm)->owner))
  59. extern int
  60. mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr);
  61. extern void mem_cgroup_end_migration(struct mem_cgroup *mem,
  62. struct page *oldpage, struct page *newpage);
  63. /*
  64. * For memory reclaim.
  65. */
  66. extern int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem);
  67. extern long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem);
  68. extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem);
  69. extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
  70. int priority);
  71. extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
  72. int priority);
  73. extern long mem_cgroup_calc_reclaim(struct mem_cgroup *mem, struct zone *zone,
  74. int priority, enum lru_list lru);
  75. #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
  76. extern int do_swap_account;
  77. #endif
  78. static inline bool mem_cgroup_disabled(void)
  79. {
  80. if (mem_cgroup_subsys.disabled)
  81. return true;
  82. return false;
  83. }
  84. #else /* CONFIG_CGROUP_MEM_RES_CTLR */
  85. struct mem_cgroup;
  86. static inline int mem_cgroup_newpage_charge(struct page *page,
  87. struct mm_struct *mm, gfp_t gfp_mask)
  88. {
  89. return 0;
  90. }
  91. static inline int mem_cgroup_cache_charge(struct page *page,
  92. struct mm_struct *mm, gfp_t gfp_mask)
  93. {
  94. return 0;
  95. }
  96. static inline int mem_cgroup_try_charge(struct mm_struct *mm,
  97. gfp_t gfp_mask, struct mem_cgroup **ptr)
  98. {
  99. return 0;
  100. }
  101. static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
  102. struct page *page, gfp_t gfp_mask, struct mem_cgroup **ptr)
  103. {
  104. return 0;
  105. }
  106. static inline void mem_cgroup_commit_charge_swapin(struct page *page,
  107. struct mem_cgroup *ptr)
  108. {
  109. }
  110. static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr)
  111. {
  112. }
  113. static inline void mem_cgroup_uncharge_page(struct page *page)
  114. {
  115. }
  116. static inline void mem_cgroup_uncharge_cache_page(struct page *page)
  117. {
  118. }
  119. static inline int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask)
  120. {
  121. return 0;
  122. }
  123. static inline void mem_cgroup_add_lru_list(struct page *page, int lru)
  124. {
  125. }
  126. static inline void mem_cgroup_del_lru_list(struct page *page, int lru)
  127. {
  128. return ;
  129. }
  130. static inline void mem_cgroup_rotate_lru_list(struct page *page, int lru)
  131. {
  132. return ;
  133. }
  134. static inline void mem_cgroup_del_lru(struct page *page)
  135. {
  136. return ;
  137. }
  138. static inline void
  139. mem_cgroup_move_lists(struct page *page, enum lru_list from, enum lru_list to)
  140. {
  141. }
  142. static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
  143. {
  144. return 1;
  145. }
  146. static inline int task_in_mem_cgroup(struct task_struct *task,
  147. const struct mem_cgroup *mem)
  148. {
  149. return 1;
  150. }
  151. static inline int
  152. mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr)
  153. {
  154. return 0;
  155. }
  156. static inline void mem_cgroup_end_migration(struct mem_cgroup *mem,
  157. struct page *oldpage,
  158. struct page *newpage)
  159. {
  160. }
  161. static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem)
  162. {
  163. return 0;
  164. }
  165. static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem)
  166. {
  167. return 0;
  168. }
  169. static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
  170. {
  171. return 0;
  172. }
  173. static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
  174. int priority)
  175. {
  176. }
  177. static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
  178. int priority)
  179. {
  180. }
  181. static inline long mem_cgroup_calc_reclaim(struct mem_cgroup *mem,
  182. struct zone *zone, int priority,
  183. enum lru_list lru)
  184. {
  185. return 0;
  186. }
  187. static inline bool mem_cgroup_disabled(void)
  188. {
  189. return true;
  190. }
  191. #endif /* CONFIG_CGROUP_MEM_CONT */
  192. #endif /* _LINUX_MEMCONTROL_H */