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123 lines
3.0 KiB
123 lines
3.0 KiB
/* |
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* Copyright IBM Corporation, 2012 |
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* Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> |
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* |
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* This program is free software; you can redistribute it and/or modify it |
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* under the terms of version 2.1 of the GNU Lesser General Public License |
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* as published by the Free Software Foundation. |
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* |
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* This program is distributed in the hope that it would be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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* |
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*/ |
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#ifndef _LINUX_HUGETLB_CGROUP_H |
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#define _LINUX_HUGETLB_CGROUP_H |
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#include <linux/mmdebug.h> |
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struct hugetlb_cgroup; |
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/* |
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* Minimum page order trackable by hugetlb cgroup. |
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* At least 3 pages are necessary for all the tracking information. |
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*/ |
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#define HUGETLB_CGROUP_MIN_ORDER 2 |
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#ifdef CONFIG_CGROUP_HUGETLB |
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static inline struct hugetlb_cgroup *hugetlb_cgroup_from_page(struct page *page) |
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{ |
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VM_BUG_ON_PAGE(!PageHuge(page), page); |
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if (compound_order(page) < HUGETLB_CGROUP_MIN_ORDER) |
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return NULL; |
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return (struct hugetlb_cgroup *)page[2].private; |
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} |
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static inline |
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int set_hugetlb_cgroup(struct page *page, struct hugetlb_cgroup *h_cg) |
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{ |
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VM_BUG_ON_PAGE(!PageHuge(page), page); |
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if (compound_order(page) < HUGETLB_CGROUP_MIN_ORDER) |
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return -1; |
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page[2].private = (unsigned long)h_cg; |
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return 0; |
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} |
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static inline bool hugetlb_cgroup_disabled(void) |
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{ |
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return !cgroup_subsys_enabled(hugetlb_cgrp_subsys); |
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} |
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extern int hugetlb_cgroup_charge_cgroup(int idx, unsigned long nr_pages, |
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struct hugetlb_cgroup **ptr); |
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extern void hugetlb_cgroup_commit_charge(int idx, unsigned long nr_pages, |
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struct hugetlb_cgroup *h_cg, |
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struct page *page); |
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extern void hugetlb_cgroup_uncharge_page(int idx, unsigned long nr_pages, |
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struct page *page); |
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extern void hugetlb_cgroup_uncharge_cgroup(int idx, unsigned long nr_pages, |
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struct hugetlb_cgroup *h_cg); |
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extern void hugetlb_cgroup_file_init(void) __init; |
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extern void hugetlb_cgroup_migrate(struct page *oldhpage, |
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struct page *newhpage); |
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#else |
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static inline struct hugetlb_cgroup *hugetlb_cgroup_from_page(struct page *page) |
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{ |
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return NULL; |
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} |
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static inline |
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int set_hugetlb_cgroup(struct page *page, struct hugetlb_cgroup *h_cg) |
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{ |
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return 0; |
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} |
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static inline bool hugetlb_cgroup_disabled(void) |
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{ |
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return true; |
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} |
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static inline int |
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hugetlb_cgroup_charge_cgroup(int idx, unsigned long nr_pages, |
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struct hugetlb_cgroup **ptr) |
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{ |
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return 0; |
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} |
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static inline void |
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hugetlb_cgroup_commit_charge(int idx, unsigned long nr_pages, |
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struct hugetlb_cgroup *h_cg, |
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struct page *page) |
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{ |
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return; |
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} |
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static inline void |
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hugetlb_cgroup_uncharge_page(int idx, unsigned long nr_pages, struct page *page) |
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{ |
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return; |
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} |
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static inline void |
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hugetlb_cgroup_uncharge_cgroup(int idx, unsigned long nr_pages, |
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struct hugetlb_cgroup *h_cg) |
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{ |
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return; |
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} |
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static inline void hugetlb_cgroup_file_init(void) |
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{ |
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} |
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static inline void hugetlb_cgroup_migrate(struct page *oldhpage, |
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struct page *newhpage) |
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{ |
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return; |
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} |
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#endif /* CONFIG_MEM_RES_CTLR_HUGETLB */ |
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#endif
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