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 "lapi/abisize.h"
34 #include "numa_helper.h"
35 #include "mem.h"
36
37 #ifdef HAVE_NUMA_V2
38
verify_oom(void)39 static void verify_oom(void)
40 {
41 #ifdef TST_ABI32
42 tst_brk(TCONF, "test is not designed for 32-bit system.");
43 #endif
44 tst_res(TINFO, "OOM on CPUSET...");
45 testoom(0, 0, ENOMEM, 1);
46
47 if (is_numa(NULL, NH_MEMS, 2) &&
48 SAFE_CG_HAS(tst_cg, "cpuset.memory_migrate")) {
49 /*
50 * Under NUMA system, the migration of cpuset's memory
51 * is in charge of cpuset.memory_migrate, we can write
52 * 1 to cpuset.memory_migrate to enable the migration.
53 */
54 SAFE_CG_PRINT(tst_cg, "cpuset.memory_migrate", "1");
55
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 /*
69 * Some nodes do not contain memory, so use
70 * get_allowed_nodes(NH_MEMS) to get a memory
71 * node. This operation also applies to Non-NUMA
72 * systems.
73 */
74 ret = get_allowed_nodes(NH_MEMS, 1, &memnode);
75 if (ret < 0)
76 tst_brk(TBROK, "Failed to get a memory node "
77 "using get_allowed_nodes()");
78 write_cpusets(tst_cg, memnode);
79 SAFE_CG_PRINTF(tst_cg, "cgroup.procs", "%d", getpid());
80 }
81
82 static struct tst_test test = {
83 .needs_root = 1,
84 .forks_child = 1,
85 .max_runtime = TST_UNLIMITED_RUNTIME,
86 .setup = setup,
87 .test_all = verify_oom,
88 .needs_cgroup_ctrls = (const char *const []){ "cpuset", NULL },
89 .save_restore = (const struct tst_path_val[]) {
90 {"/proc/sys/vm/overcommit_memory", "1", TST_SR_TBROK},
91 {}
92 },
93 };
94
95 #else
96 TST_TEST_TCONF(NUMA_ERROR_MSG);
97 #endif
98