1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
/*
* Out Of Memory (OOM)
*
* The program is designed to cope with unpredictable like amount and
* system physical memory, swap size and other VMM technology like KSM,
* memcg, memory hotplug and so on which may affect the OOM
* behaviours. It simply increase the memory consumption 3G each time
* until all the available memory is consumed and OOM is triggered.
*
* Copyright (C) 2010-2017 Red Hat, Inc.
*
* 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.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "lapi/abisize.h"
#include "mem.h"
static void verify_oom(void)
{
#ifdef TST_ABI32
tst_brk(TCONF, "test is not designed for 32-bit system.");
#endif
/* we expect mmap to fail before OOM is hit */
set_sys_tune("overcommit_memory", 2, 1);
oom(NORMAL, 0, ENOMEM, 0);
/* with overcommit_memory set to 0 or 1 there's no
* guarantee that mmap fails before OOM */
set_sys_tune("overcommit_memory", 0, 1);
oom(NORMAL, 0, ENOMEM, 1);
set_sys_tune("overcommit_memory", 1, 1);
testoom(0, 0, ENOMEM, 1);
}
static void setup(void)
{
overcommit = get_sys_tune("overcommit_memory");
}
static void cleanup(void)
{
if (overcommit != -1)
set_sys_tune("overcommit_memory", overcommit, 0);
}
static struct tst_test test = {
.needs_root = 1,
.forks_child = 1,
.max_runtime = TST_UNLIMITED_RUNTIME,
.setup = setup,
.cleanup = cleanup,
.test_all = verify_oom,
};
|
