67 lines
1.3 KiB
C
67 lines
1.3 KiB
C
// SPDX-License-Identifier: LGPL-2.1-or-later
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/*
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* Copyright (C) 2013 LG Electronics.
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* Author: Joonsoo Kim
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*/
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/*\
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* [Description]
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*
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* Test to correct handling for reserve count. If no reserved mapping is
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* created to reserved file region, it should be considered as reserve
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* mapping. Otherwise, reserve count will be overflowed.
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*/
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#include "hugetlb.h"
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#define MNTPOINT "hugetlbfs/"
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static long hpage_size;
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static int fd = -1;
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static void run_test(void)
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{
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unsigned long initial_resv, end_resv;
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int fd;
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char *p, *q;
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initial_resv = SAFE_READ_MEMINFO(MEMINFO_HPAGE_RSVD);
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fd = tst_creat_unlinked(MNTPOINT, 0);
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p = SAFE_MMAP(NULL, hpage_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
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q = SAFE_MMAP(NULL, hpage_size,
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PROT_READ | PROT_WRITE, MAP_SHARED | MAP_NORESERVE, fd, 0);
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*q = 's';
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SAFE_MUNMAP(p, hpage_size);
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SAFE_MUNMAP(q, hpage_size);
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SAFE_CLOSE(fd);
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end_resv = SAFE_READ_MEMINFO(MEMINFO_HPAGE_RSVD);
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TST_EXP_EQ_LU(initial_resv, end_resv);
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}
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static void setup(void)
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{
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hpage_size = tst_get_hugepage_size();
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}
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static void cleanup(void)
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{
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if (fd >= 0)
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SAFE_CLOSE(fd);
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}
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static struct tst_test test = {
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.needs_root = 1,
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.mntpoint = MNTPOINT,
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.needs_hugetlbfs = 1,
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.needs_tmpdir = 1,
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.setup = setup,
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.cleanup = cleanup,
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.test_all = run_test,
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.hugepages = {2, TST_NEEDS},
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};
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