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 int memcg_mounted;
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
47 SAFE_FILE_PRINTF(MEMCG_PATH_NEW "/tasks", "%d", getpid());
48 SAFE_FILE_PRINTF(MEMCG_LIMIT, "%ld", TESTMEM);
49
50 testoom(0, 0, ENOMEM, 1);
51
52 if (access(MEMCG_SW_LIMIT, F_OK) == -1) {
53 if (errno == ENOENT)
54 tst_res(TCONF,
55 "memcg swap accounting is disabled");
56 else
57 tst_brk(TBROK | TERRNO, "access");
58 } else {
59 SAFE_FILE_PRINTF(MEMCG_SW_LIMIT, "%ld", TESTMEM);
60 testoom(0, 1, ENOMEM, 1);
61 }
62
63 /* OOM for MEMCG with mempolicy */
64 if (is_numa(NULL, NH_MEMS, 2)) {
65 tst_res(TINFO, "OOM on MEMCG & mempolicy...");
66 testoom(MPOL_BIND, 0, ENOMEM, 1);
67 testoom(MPOL_INTERLEAVE, 0, ENOMEM, 1);
68 testoom(MPOL_PREFERRED, 0, ENOMEM, 1);
69 }
70 }
71
setup(void)72 static void setup(void)
73 {
74 overcommit = get_sys_tune("overcommit_memory");
75 set_sys_tune("overcommit_memory", 1, 1);
76 mount_mem("memcg", "cgroup", "memory", MEMCG_PATH, MEMCG_PATH_NEW);
77 memcg_mounted = 1;
78 }
79
cleanup(void)80 static void cleanup(void)
81 {
82 if (overcommit != -1)
83 set_sys_tune("overcommit_memory", overcommit, 0);
84 if (memcg_mounted)
85 umount_mem(MEMCG_PATH, MEMCG_PATH_NEW);
86 }
87
88 static struct tst_test test = {
89 .needs_root = 1,
90 .forks_child = 1,
91 .timeout = -1,
92 .setup = setup,
93 .cleanup = cleanup,
94 .test_all = verify_oom,
95 };
96
97 #else
98 TST_TEST_TCONF(NUMA_ERROR_MSG);
99 #endif
100