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#
u= #/*
* Copyright IBM Corporation, 2012
* Author Aneesh Kumar K.V
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2.1 of the GNU Lesser General Public License
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
*/
#ifndef _LINUX_HUGETLB_CGROUP_H
#define _LINUX_HUGETLB_CGROUP_H
#include
struct hugetlb_cgroup;
struct resv_map;
struct file_region;
#ifdef CONFIG_CGROUP_HUGETLB
/*
* Minimum page order trackable by hugetlb cgroup.
* At least 3 pages are necessary for all the tracking information.
* The second tail page contains all of the hugetlb-specific fields.
*/
#define HUGETLB_CGROUP_MIN_ORDER order_base_2(__NR_USED_SUBPAGE)
enum hugetlb_memory_event {
HUGETLB_MAX,
HUGETLB_NR_MEMORY_EVENTS,
};
struct hugetlb_cgroup_per_node {
/* hugetlb usage in pages over all hstates. */
unsigned long usage[HUGE_MAX_HSTATE];
};
struct hugetlb_cgroup {
struct cgroup_subsys_state css;
/*
* the counter to account for hugepages from hugetlb.
*/
struct page_counter hugepage[HUGE_MAX_HSTATE];
/*
* the counter to account for hugepage reservations from hugetlb.
*/
struct page_counter rsvd_hugepage[HUGE_MAX_HSTATE];
atomic_long_t events[HUGE_MAX_HSTATE][HUGETLB_NR_MEMORY_EVENTS];
atomic_long_t events_local[HUGE_MAX_HSTATE][HUGETLB_NR_MEMORY_EVENTS];
/* Handle for "hugetlb.events" */
struct cgroup_file events_file[HUGE_MAX_HSTATE];
/* Handle for "hugetlb.events.local" */
struct cgroup_file events_local_file[HUGE_MAX_HSTATE];
struct hugetlb_cgroup_per_node *nodeinfo[];
};
static inline struct hugetlb_cgroup *
__hugetlb_cgroup_from_folio(struct folio *folio, bool rsvd)
{
VM_BUG_ON_FOLIO(!folio_test_hugetlb(folio), folio);
if (folio_order(folio) < HUGETLB_CGROUP_MIN_ORDER)
return NULL;
if (rsvd)
return folio->_hugetlb_cgroup_rsvd;
else
return folio->_hugetlb_cgroup;
}
static inline struct hugetlb_cgroup *hugetlb_cgroup_from_folio(struct folio *folio)
{
return __hugetlb_cgroup_from_folio(folio, false);
}
static inline struct hugetlb_cgroup *
hugetlb_cgroup_from_folio_rsvd(struct folio *folio)
{
return __hugetlb_cgroup_from_folio(folio, true);
}
static inline void __set_hugetlb_cgroup(struct folio *folio,
struct hugetlb_cgroup *h_cg, bool rsvd)
{
VM_BUG_ON_FOLIO(