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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2019 Red Hat, Inc.
*/
#ifndef TST_HUGEPAGE__
#define TST_HUGEPAGE__
#define PATH_HUGEPAGES "/sys/kernel/mm/hugepages/"
#define PATH_NR_HPAGES "/proc/sys/vm/nr_hugepages"
extern char *nr_opt; /* -s num Set the number of the been allocated hugepages */
extern char *Hopt; /* -H /.. Location of hugetlbfs, i.e. -H /var/hugetlbfs */
/*
* Get the default hugepage size. Returns 0 if hugepages are not supported.
*/
size_t tst_get_hugepage_size(void);
/*
* Try the best to request a specified number of huge pages from system,
* it will store the reserved hpage number in tst_hugepages.
*
* Note: this depend on the status of system memory fragmentation.
*/
unsigned long tst_request_hugepages(unsigned long hpages);
/*
* This variable is used for recording the number of hugepages which system can
* provides. It will be equal to 'hpages' if tst_request_hugepages on success,
* otherwise set it to a number of hugepages that we were able to reserve.
*
* If system does not support hugetlb, then it will be set to 0.
*/
extern unsigned long tst_hugepages;
#endif /* TST_HUGEPAGE_H */
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