1 /*
2 * Out Of Memory (OOM) for Memory Resource Controller
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 "lapi/abisize.h"
34 #include "numa_helper.h"
35 #include "mem.h"
36
37 #ifdef HAVE_NUMA_V2
38
39 static const struct tst_cgroup_group *cg;
40
verify_oom(void)41 static void verify_oom(void)
42 {
43 #ifdef TST_ABI32
44 tst_brk(TCONF, "test is not designed for 32-bit system.");
45 #endif
46 testoom(0, 0, ENOMEM, 1);
47
48 if (SAFE_CGROUP_HAS(cg, "memory.swap.max")) {
49 SAFE_CGROUP_PRINTF(cg, "memory.swap.max", "%lu", TESTMEM);
50 testoom(0, 1, ENOMEM, 1);
51 }
52
53 /* OOM for MEMCG with mempolicy */
54 if (is_numa(NULL, NH_MEMS, 2)) {
55 tst_res(TINFO, "OOM on MEMCG & mempolicy...");
56 testoom(MPOL_BIND, 0, ENOMEM, 1);
57 testoom(MPOL_INTERLEAVE, 0, ENOMEM, 1);
58 testoom(MPOL_PREFERRED, 0, ENOMEM, 1);
59 }
60 }
61
setup(void)62 static void setup(void)
63 {
64 overcommit = get_sys_tune("overcommit_memory");
65 set_sys_tune("overcommit_memory", 1, 1);
66
67 tst_cgroup_require("memory", NULL);
68 cg = tst_cgroup_get_test_group();
69 SAFE_CGROUP_PRINTF(cg, "cgroup.procs", "%d", getpid());
70 SAFE_CGROUP_PRINTF(cg, "memory.max", "%lu", TESTMEM);
71 }
72
cleanup(void)73 static void cleanup(void)
74 {
75 if (overcommit != -1)
76 set_sys_tune("overcommit_memory", overcommit, 0);
77 tst_cgroup_cleanup();
78 }
79
80 static struct tst_test test = {
81 .needs_root = 1,
82 .forks_child = 1,
83 .timeout = -1,
84 .setup = setup,
85 .cleanup = cleanup,
86 .test_all = verify_oom,
87 };
88
89 #else
90 TST_TEST_TCONF(NUMA_ERROR_MSG);
91 #endif
92