1 /*
2 * Out Of Memory (OOM) for CPUSET
3 *
4 * The program is designed to cope with unpredictable like amount and
5 * system physical memory, swap size and other VMM technology like KSM,
6 * memcg, memory hotplug and so on which may affect the OOM
7 * behaviours. It simply increase the memory consumption 3G each time
8 * until all the available memory is consumed and OOM is triggered.
9 *
10 * Copyright (C) 2010-2017 Red Hat, Inc.
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
20 * the GNU General Public License for more details.
21 */
22
23 #include "config.h"
24 #include <sys/types.h>
25 #include <sys/stat.h>
26 #include <errno.h>
27 #include <fcntl.h>
28 #include <stdio.h>
29 #if HAVE_NUMA_H
30 #include <numa.h>
31 #endif
32
33 #include "numa_helper.h"
34 #include "mem.h"
35
36 #ifdef HAVE_NUMA_V2
37
38 static int cpuset_mounted;
39
verify_oom(void)40 static void verify_oom(void)
41 {
42 #if __WORDSIZE == 32
43 tst_brk(TCONF, "test is not designed for 32-bit system.");
44 #endif
45
46 tst_res(TINFO, "OOM on CPUSET...");
47 testoom(0, 0, ENOMEM, 1);
48
49 if (is_numa(NULL, NH_MEMS, 2)) {
50 /*
51 * Under NUMA system, the migration of cpuset's memory
52 * is in charge of cpuset.memory_migrate, we can write
53 * 1 to cpuset.memory_migrate to enable the migration.
54 */
55 write_cpuset_files(CPATH_NEW, "memory_migrate", "1");
56 tst_res(TINFO, "OOM on CPUSET with mem migrate:");
57 testoom(0, 0, ENOMEM, 1);
58 }
59 }
60
setup(void)61 static void setup(void)
62 {
63 int memnode, ret;
64
65 if (!is_numa(NULL, NH_MEMS, 1))
66 tst_brk(TCONF, "requires NUMA with at least 1 node");
67
68 overcommit = get_sys_tune("overcommit_memory");
69 set_sys_tune("overcommit_memory", 1, 1);
70
71 mount_mem("cpuset", "cpuset", NULL, CPATH, CPATH_NEW);
72 cpuset_mounted = 1;
73
74 /*
75 * Some nodes do not contain memory, so use
76 * get_allowed_nodes(NH_MEMS) to get a memory
77 * node. This operation also applies to Non-NUMA
78 * systems.
79 */
80 ret = get_allowed_nodes(NH_MEMS, 1, &memnode);
81 if (ret < 0)
82 tst_brk(TBROK, "Failed to get a memory node "
83 "using get_allowed_nodes()");
84 write_cpusets(memnode);
85 }
86
cleanup(void)87 static void cleanup(void)
88 {
89 if (overcommit != -1)
90 set_sys_tune("overcommit_memory", overcommit, 0);
91 if (cpuset_mounted)
92 umount_mem(CPATH, CPATH_NEW);
93 }
94
95 static struct tst_test test = {
96 .needs_root = 1,
97 .forks_child = 1,
98 .timeout = -1,
99 .setup = setup,
100 .cleanup = cleanup,
101 .test_all = verify_oom,
102 };
103
104 #else
105 TST_TEST_TCONF(NUMA_ERROR_MSG);
106 #endif
107