blob: 0129f89cf98de1b506452b7df8251ce0bef4f6b9 [file] [log] [blame]
Aneesh Kumar K.V2bc64a22012-07-31 16:42:12 -07001/*
2 * Copyright IBM Corporation, 2012
3 * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
4 *
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.
8 *
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.
12 *
13 */
14
15#ifndef _LINUX_HUGETLB_CGROUP_H
16#define _LINUX_HUGETLB_CGROUP_H
17
Sasha Levin309381fea2014-01-23 15:52:54 -080018#include <linux/mmdebug.h>
Aneesh Kumar K.V2bc64a22012-07-31 16:42:12 -070019#include <linux/res_counter.h>
20
21struct hugetlb_cgroup;
Aneesh Kumar K.V9dd540e2012-07-31 16:42:15 -070022/*
23 * Minimum page order trackable by hugetlb cgroup.
24 * At least 3 pages are necessary for all the tracking information.
25 */
26#define HUGETLB_CGROUP_MIN_ORDER 2
Aneesh Kumar K.V2bc64a22012-07-31 16:42:12 -070027
28#ifdef CONFIG_CGROUP_HUGETLB
Aneesh Kumar K.V9dd540e2012-07-31 16:42:15 -070029
30static inline struct hugetlb_cgroup *hugetlb_cgroup_from_page(struct page *page)
31{
Sasha Levin309381fea2014-01-23 15:52:54 -080032 VM_BUG_ON_PAGE(!PageHuge(page), page);
Aneesh Kumar K.V9dd540e2012-07-31 16:42:15 -070033
34 if (compound_order(page) < HUGETLB_CGROUP_MIN_ORDER)
35 return NULL;
36 return (struct hugetlb_cgroup *)page[2].lru.next;
37}
38
39static inline
40int set_hugetlb_cgroup(struct page *page, struct hugetlb_cgroup *h_cg)
41{
Sasha Levin309381fea2014-01-23 15:52:54 -080042 VM_BUG_ON_PAGE(!PageHuge(page), page);
Aneesh Kumar K.V9dd540e2012-07-31 16:42:15 -070043
44 if (compound_order(page) < HUGETLB_CGROUP_MIN_ORDER)
45 return -1;
46 page[2].lru.next = (void *)h_cg;
47 return 0;
48}
49
Aneesh Kumar K.V2bc64a22012-07-31 16:42:12 -070050static inline bool hugetlb_cgroup_disabled(void)
51{
Tejun Heo073219e2014-02-08 10:36:58 -050052 if (hugetlb_cgrp_subsys.disabled)
Aneesh Kumar K.V2bc64a22012-07-31 16:42:12 -070053 return true;
54 return false;
55}
56
Aneesh Kumar K.V6d76dcf2012-07-31 16:42:18 -070057extern int hugetlb_cgroup_charge_cgroup(int idx, unsigned long nr_pages,
58 struct hugetlb_cgroup **ptr);
59extern void hugetlb_cgroup_commit_charge(int idx, unsigned long nr_pages,
60 struct hugetlb_cgroup *h_cg,
61 struct page *page);
62extern void hugetlb_cgroup_uncharge_page(int idx, unsigned long nr_pages,
63 struct page *page);
64extern void hugetlb_cgroup_uncharge_cgroup(int idx, unsigned long nr_pages,
65 struct hugetlb_cgroup *h_cg);
Jianguo Wu7179e7b2012-12-18 14:23:19 -080066extern void hugetlb_cgroup_file_init(void) __init;
Aneesh Kumar K.V8e6ac7f2012-07-31 16:42:27 -070067extern void hugetlb_cgroup_migrate(struct page *oldhpage,
68 struct page *newhpage);
Aneesh Kumar K.V6d76dcf2012-07-31 16:42:18 -070069
Aneesh Kumar K.V2bc64a22012-07-31 16:42:12 -070070#else
Aneesh Kumar K.V9dd540e2012-07-31 16:42:15 -070071static inline struct hugetlb_cgroup *hugetlb_cgroup_from_page(struct page *page)
72{
73 return NULL;
74}
75
76static inline
77int set_hugetlb_cgroup(struct page *page, struct hugetlb_cgroup *h_cg)
78{
79 return 0;
80}
81
Aneesh Kumar K.V2bc64a22012-07-31 16:42:12 -070082static inline bool hugetlb_cgroup_disabled(void)
83{
84 return true;
85}
86
Aneesh Kumar K.V6d76dcf2012-07-31 16:42:18 -070087static inline int
88hugetlb_cgroup_charge_cgroup(int idx, unsigned long nr_pages,
89 struct hugetlb_cgroup **ptr)
90{
91 return 0;
92}
93
94static inline void
95hugetlb_cgroup_commit_charge(int idx, unsigned long nr_pages,
96 struct hugetlb_cgroup *h_cg,
97 struct page *page)
98{
99 return;
100}
101
102static inline void
103hugetlb_cgroup_uncharge_page(int idx, unsigned long nr_pages, struct page *page)
104{
105 return;
106}
107
108static inline void
109hugetlb_cgroup_uncharge_cgroup(int idx, unsigned long nr_pages,
110 struct hugetlb_cgroup *h_cg)
111{
112 return;
113}
114
Jianguo Wu7179e7b2012-12-18 14:23:19 -0800115static inline void hugetlb_cgroup_file_init(void)
Aneesh Kumar K.Vabb82062012-07-31 16:42:24 -0700116{
Aneesh Kumar K.Vabb82062012-07-31 16:42:24 -0700117}
118
Aneesh Kumar K.V8e6ac7f2012-07-31 16:42:27 -0700119static inline void hugetlb_cgroup_migrate(struct page *oldhpage,
120 struct page *newhpage)
121{
122 return;
123}
124
Aneesh Kumar K.V2bc64a22012-07-31 16:42:12 -0700125#endif /* CONFIG_MEM_RES_CTLR_HUGETLB */
126#endif