/*
* Copyright (c) Linux Test Project, 2014-2017
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
* the GNU General Public License for more details.
*/
/*
* DESCRIPTION
* hugeshmat04 - test for hugepage leak inspection.
*
* It is a regression test for shared hugepage leak, when over 1GB
* shered memory was alocated in hugepage, the hugepage is not released
* though process finished.
*
* You need more than 2GB memory in test job
*
* HISTORY
* 05/2014 - Written by Fujistu Corp.
* 12/2014 - Port to LTP by Li Wang.
*
* RESTRICTIONS
* test must be run at root
*/
#include "hugetlb.h"
#define SIZE (1024 * 1024 * 1024)
#define BOUNDARY (1024 * 1024 * 1024)
static long huge_free;
static long huge_free2;
static long hugepages;
static long orig_shmmax, new_shmmax;
static void shared_hugepage(void);
static void test_hugeshmat(unsigned int i LTP_ATTRIBUTE_UNUSED)
{
huge_free = SAFE_READ_MEMINFO("HugePages_Free:");
shared_hugepage();
huge_free2 = SAFE_READ_MEMINFO("HugePages_Free:");
if (huge_free2 != huge_free)
tst_brk(TFAIL, "Test failed. Hugepage leak inspection.");
else
tst_res(TPASS, "No regression found.");
}
static void shared_hugepage(void)
{
pid_t pid;
int status, shmid;
size_t size = (size_t)SIZE;
void *buf;
shmid = shmget(IPC_PRIVATE, size, SHM_HUGETLB | IPC_CREAT | 0777);
if (shmid < 0)
tst_brk(TBROK | TERRNO, "shmget");
buf = shmat(shmid, (void *)BOUNDARY, SHM_RND | 0777);
if (buf == (void *)-1) {
shmctl(shmid, IPC_RMID, NULL);
tst_brk(TBROK | TERRNO, "shmat");
}
memset(buf, 2, size);
pid = SAFE_FORK();
if (pid == 0)
exit(1);
wait(&status);
shmdt(buf);
shmctl(shmid, IPC_RMID, NULL);
}
static void setup(void)
{
long mem_total, hpage_size, orig_hugepages;
orig_hugepages = save_nr_hugepages();
mem_total = SAFE_READ_MEMINFO("MemTotal:");
SAFE_FILE_SCANF(PATH_SHMMAX, "%ld", &orig_shmmax);
SAFE_FILE_PRINTF(PATH_SHMMAX, "%ld", (long)SIZE);
SAFE_FILE_SCANF(PATH_SHMMAX, "%ld", &new_shmmax);
if (mem_total < 2L*1024*1024)
tst_brk(TCONF, "Needed > 2GB RAM, have: %ld", mem_total);
if (new_shmmax < SIZE)
tst_brk(TCONF, "shmmax too low, have: %ld", new_shmmax);
hpage_size = SAFE_READ_MEMINFO("Hugepagesize:") * 1024;
hugepages = (orig_hugepages * hpage_size + SIZE) / hpage_size;
set_sys_tune("nr_hugepages", hugepages, 1);
}
static void cleanup(void)
{
restore_nr_hugepages();
SAFE_FILE_PRINTF(PATH_SHMMAX, "%ld", orig_shmmax);
}
static struct tst_test test = {
.needs_root = 1,
.forks_child = 1,
.needs_tmpdir = 1,
.tcnt = 3,
.test = test_hugeshmat,
.setup = setup,
.cleanup = cleanup,
};