2 * Copyright IBM Corporation, 2012
3 * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of version 2.1 of the GNU Lesser General Public License
7 * as published by the Free Software Foundation.
9 * This program is distributed in the hope that it would be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
15 #ifndef _LINUX_HUGETLB_CGROUP_H
16 #define _LINUX_HUGETLB_CGROUP_H
18 #include <linux/mmdebug.h>
20 struct hugetlb_cgroup;
25 * Minimum page order trackable by hugetlb cgroup.
26 * At least 4 pages are necessary for all the tracking information.
27 * The second tail page (hpage[2]) is the fault usage cgroup.
28 * The third tail page (hpage[3]) is the reservation usage cgroup.
30 #define HUGETLB_CGROUP_MIN_ORDER 2
32 #ifdef CONFIG_CGROUP_HUGETLB
33 enum hugetlb_memory_event {
35 HUGETLB_NR_MEMORY_EVENTS,
38 struct hugetlb_cgroup {
39 struct cgroup_subsys_state css;
42 * the counter to account for hugepages from hugetlb.
44 struct page_counter hugepage[HUGE_MAX_HSTATE];
47 * the counter to account for hugepage reservations from hugetlb.
49 struct page_counter rsvd_hugepage[HUGE_MAX_HSTATE];
51 atomic_long_t events[HUGE_MAX_HSTATE][HUGETLB_NR_MEMORY_EVENTS];
52 atomic_long_t events_local[HUGE_MAX_HSTATE][HUGETLB_NR_MEMORY_EVENTS];
54 /* Handle for "hugetlb.events" */
55 struct cgroup_file events_file[HUGE_MAX_HSTATE];
57 /* Handle for "hugetlb.events.local" */
58 struct cgroup_file events_local_file[HUGE_MAX_HSTATE];
61 static inline struct hugetlb_cgroup *
62 __hugetlb_cgroup_from_page(struct page *page, bool rsvd)
64 VM_BUG_ON_PAGE(!PageHuge(page), page);
66 if (compound_order(page) < HUGETLB_CGROUP_MIN_ORDER)
69 return (struct hugetlb_cgroup *)page[3].private;
71 return (struct hugetlb_cgroup *)page[2].private;
74 static inline struct hugetlb_cgroup *hugetlb_cgroup_from_page(struct page *page)
76 return __hugetlb_cgroup_from_page(page, false);
79 static inline struct hugetlb_cgroup *
80 hugetlb_cgroup_from_page_rsvd(struct page *page)
82 return __hugetlb_cgroup_from_page(page, true);
85 static inline int __set_hugetlb_cgroup(struct page *page,
86 struct hugetlb_cgroup *h_cg, bool rsvd)
88 VM_BUG_ON_PAGE(!PageHuge(page), page);
90 if (compound_order(page) < HUGETLB_CGROUP_MIN_ORDER)
93 page[3].private = (unsigned long)h_cg;
95 page[2].private = (unsigned long)h_cg;
99 static inline int set_hugetlb_cgroup(struct page *page,
100 struct hugetlb_cgroup *h_cg)
102 return __set_hugetlb_cgroup(page, h_cg, false);
105 static inline int set_hugetlb_cgroup_rsvd(struct page *page,
106 struct hugetlb_cgroup *h_cg)
108 return __set_hugetlb_cgroup(page, h_cg, true);
111 static inline bool hugetlb_cgroup_disabled(void)
113 return !cgroup_subsys_enabled(hugetlb_cgrp_subsys);
116 static inline void hugetlb_cgroup_put_rsvd_cgroup(struct hugetlb_cgroup *h_cg)
121 static inline void resv_map_dup_hugetlb_cgroup_uncharge_info(
122 struct resv_map *resv_map)
125 css_get(resv_map->css);
128 extern int hugetlb_cgroup_charge_cgroup(int idx, unsigned long nr_pages,
129 struct hugetlb_cgroup **ptr);
130 extern int hugetlb_cgroup_charge_cgroup_rsvd(int idx, unsigned long nr_pages,
131 struct hugetlb_cgroup **ptr);
132 extern void hugetlb_cgroup_commit_charge(int idx, unsigned long nr_pages,
133 struct hugetlb_cgroup *h_cg,
135 extern void hugetlb_cgroup_commit_charge_rsvd(int idx, unsigned long nr_pages,
136 struct hugetlb_cgroup *h_cg,
138 extern void hugetlb_cgroup_uncharge_page(int idx, unsigned long nr_pages,
140 extern void hugetlb_cgroup_uncharge_page_rsvd(int idx, unsigned long nr_pages,
143 extern void hugetlb_cgroup_uncharge_cgroup(int idx, unsigned long nr_pages,
144 struct hugetlb_cgroup *h_cg);
145 extern void hugetlb_cgroup_uncharge_cgroup_rsvd(int idx, unsigned long nr_pages,
146 struct hugetlb_cgroup *h_cg);
147 extern void hugetlb_cgroup_uncharge_counter(struct resv_map *resv,
151 extern void hugetlb_cgroup_uncharge_file_region(struct resv_map *resv,
152 struct file_region *rg,
153 unsigned long nr_pages,
156 extern void hugetlb_cgroup_file_init(void) __init;
157 extern void hugetlb_cgroup_migrate(struct page *oldhpage,
158 struct page *newhpage);
161 static inline void hugetlb_cgroup_uncharge_file_region(struct resv_map *resv,
162 struct file_region *rg,
163 unsigned long nr_pages,
168 static inline struct hugetlb_cgroup *hugetlb_cgroup_from_page(struct page *page)
173 static inline struct hugetlb_cgroup *
174 hugetlb_cgroup_from_page_resv(struct page *page)
179 static inline struct hugetlb_cgroup *
180 hugetlb_cgroup_from_page_rsvd(struct page *page)
185 static inline int set_hugetlb_cgroup(struct page *page,
186 struct hugetlb_cgroup *h_cg)
191 static inline int set_hugetlb_cgroup_rsvd(struct page *page,
192 struct hugetlb_cgroup *h_cg)
197 static inline bool hugetlb_cgroup_disabled(void)
202 static inline void hugetlb_cgroup_put_rsvd_cgroup(struct hugetlb_cgroup *h_cg)
206 static inline void resv_map_dup_hugetlb_cgroup_uncharge_info(
207 struct resv_map *resv_map)
211 static inline int hugetlb_cgroup_charge_cgroup(int idx, unsigned long nr_pages,
212 struct hugetlb_cgroup **ptr)
217 static inline int hugetlb_cgroup_charge_cgroup_rsvd(int idx,
218 unsigned long nr_pages,
219 struct hugetlb_cgroup **ptr)
224 static inline void hugetlb_cgroup_commit_charge(int idx, unsigned long nr_pages,
225 struct hugetlb_cgroup *h_cg,
231 hugetlb_cgroup_commit_charge_rsvd(int idx, unsigned long nr_pages,
232 struct hugetlb_cgroup *h_cg,
237 static inline void hugetlb_cgroup_uncharge_page(int idx, unsigned long nr_pages,
242 static inline void hugetlb_cgroup_uncharge_page_rsvd(int idx,
243 unsigned long nr_pages,
247 static inline void hugetlb_cgroup_uncharge_cgroup(int idx,
248 unsigned long nr_pages,
249 struct hugetlb_cgroup *h_cg)
254 hugetlb_cgroup_uncharge_cgroup_rsvd(int idx, unsigned long nr_pages,
255 struct hugetlb_cgroup *h_cg)
259 static inline void hugetlb_cgroup_uncharge_counter(struct resv_map *resv,
265 static inline void hugetlb_cgroup_file_init(void)
269 static inline void hugetlb_cgroup_migrate(struct page *oldhpage,
270 struct page *newhpage)
274 #endif /* CONFIG_MEM_RES_CTLR_HUGETLB */