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263 lines
6.7 KiB
263 lines
6.7 KiB
/* |
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* Copyright IBM Corporation, 2012 |
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* Author Aneesh Kumar K.V <[email protected]> |
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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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struct resv_map; |
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struct file_region; |
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/* |
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* Minimum page order trackable by hugetlb cgroup. |
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* At least 4 pages are necessary for all the tracking information. |
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* The second tail page (hpage[2]) is the fault usage cgroup. |
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* The third tail page (hpage[3]) is the reservation usage cgroup. |
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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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enum hugetlb_memory_event { |
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HUGETLB_MAX, |
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HUGETLB_NR_MEMORY_EVENTS, |
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}; |
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struct hugetlb_cgroup { |
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struct cgroup_subsys_state css; |
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/* |
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* the counter to account for hugepages from hugetlb. |
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*/ |
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struct page_counter hugepage[HUGE_MAX_HSTATE]; |
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/* |
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* the counter to account for hugepage reservations from hugetlb. |
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*/ |
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struct page_counter rsvd_hugepage[HUGE_MAX_HSTATE]; |
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atomic_long_t events[HUGE_MAX_HSTATE][HUGETLB_NR_MEMORY_EVENTS]; |
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atomic_long_t events_local[HUGE_MAX_HSTATE][HUGETLB_NR_MEMORY_EVENTS]; |
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/* Handle for "hugetlb.events" */ |
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struct cgroup_file events_file[HUGE_MAX_HSTATE]; |
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/* Handle for "hugetlb.events.local" */ |
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struct cgroup_file events_local_file[HUGE_MAX_HSTATE]; |
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}; |
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static inline struct hugetlb_cgroup * |
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__hugetlb_cgroup_from_page(struct page *page, bool rsvd) |
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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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if (rsvd) |
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return (struct hugetlb_cgroup *)page[3].private; |
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else |
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return (struct hugetlb_cgroup *)page[2].private; |
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} |
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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 __hugetlb_cgroup_from_page(page, false); |
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} |
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static inline struct hugetlb_cgroup * |
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hugetlb_cgroup_from_page_rsvd(struct page *page) |
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{ |
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return __hugetlb_cgroup_from_page(page, true); |
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} |
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static inline int __set_hugetlb_cgroup(struct page *page, |
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struct hugetlb_cgroup *h_cg, bool rsvd) |
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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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if (rsvd) |
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page[3].private = (unsigned long)h_cg; |
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else |
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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 int set_hugetlb_cgroup(struct page *page, |
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struct hugetlb_cgroup *h_cg) |
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{ |
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return __set_hugetlb_cgroup(page, h_cg, false); |
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} |
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static inline int set_hugetlb_cgroup_rsvd(struct page *page, |
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struct hugetlb_cgroup *h_cg) |
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{ |
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return __set_hugetlb_cgroup(page, h_cg, true); |
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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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static inline void hugetlb_cgroup_put_rsvd_cgroup(struct hugetlb_cgroup *h_cg) |
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{ |
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css_put(&h_cg->css); |
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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 int hugetlb_cgroup_charge_cgroup_rsvd(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_commit_charge_rsvd(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_page_rsvd(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_uncharge_cgroup_rsvd(int idx, unsigned long nr_pages, |
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struct hugetlb_cgroup *h_cg); |
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extern void hugetlb_cgroup_uncharge_counter(struct resv_map *resv, |
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unsigned long start, |
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unsigned long end); |
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extern void hugetlb_cgroup_uncharge_file_region(struct resv_map *resv, |
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struct file_region *rg, |
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unsigned long nr_pages, |
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bool region_del); |
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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 void hugetlb_cgroup_uncharge_file_region(struct resv_map *resv, |
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struct file_region *rg, |
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unsigned long nr_pages, |
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bool region_del) |
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{ |
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} |
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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 struct hugetlb_cgroup * |
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hugetlb_cgroup_from_page_resv(struct page *page) |
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{ |
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return NULL; |
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} |
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static inline struct hugetlb_cgroup * |
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hugetlb_cgroup_from_page_rsvd(struct page *page) |
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{ |
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return NULL; |
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} |
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static inline int set_hugetlb_cgroup(struct page *page, |
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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 int set_hugetlb_cgroup_rsvd(struct page *page, |
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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 void hugetlb_cgroup_put_rsvd_cgroup(struct hugetlb_cgroup *h_cg) |
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{ |
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} |
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static inline int 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 int hugetlb_cgroup_charge_cgroup_rsvd(int idx, |
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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 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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} |
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static inline void |
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hugetlb_cgroup_commit_charge_rsvd(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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} |
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static inline void hugetlb_cgroup_uncharge_page(int idx, unsigned long nr_pages, |
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struct page *page) |
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{ |
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} |
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static inline void hugetlb_cgroup_uncharge_page_rsvd(int idx, |
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unsigned long nr_pages, |
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struct page *page) |
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{ |
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} |
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static inline void hugetlb_cgroup_uncharge_cgroup(int idx, |
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unsigned long nr_pages, |
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struct hugetlb_cgroup *h_cg) |
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{ |
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} |
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static inline void |
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hugetlb_cgroup_uncharge_cgroup_rsvd(int idx, unsigned long nr_pages, |
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struct hugetlb_cgroup *h_cg) |
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{ |
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} |
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static inline void hugetlb_cgroup_uncharge_counter(struct resv_map *resv, |
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unsigned long start, |
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unsigned long end) |
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{ |
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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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} |
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#endif /* CONFIG_MEM_RES_CTLR_HUGETLB */ |
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#endif
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