100 lines
2.5 KiB
C
100 lines
2.5 KiB
C
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/*
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* Out Of Memory (OOM) for Memory Resource Controller
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*
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* The program is designed to cope with unpredictable like amount and
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* system physical memory, swap size and other VMM technology like KSM,
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* memcg, memory hotplug and so on which may affect the OOM
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* behaviours. It simply increase the memory consumption 3G each time
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* until all the available memory is consumed and OOM is triggered.
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*
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* Copyright (C) 2010-2017 Red Hat, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*/
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#include "config.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#if HAVE_NUMA_H
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#include <numa.h>
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#endif
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#include "lapi/abisize.h"
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#include "numa_helper.h"
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#include "mem.h"
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#ifdef HAVE_NUMA_V2
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static int memcg_mounted;
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static void verify_oom(void)
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{
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#ifdef TST_ABI32
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tst_brk(TCONF, "test is not designed for 32-bit system.");
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#endif
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SAFE_FILE_PRINTF(MEMCG_PATH_NEW "/tasks", "%d", getpid());
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SAFE_FILE_PRINTF(MEMCG_LIMIT, "%ld", TESTMEM);
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testoom(0, 0, ENOMEM, 1);
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if (access(MEMCG_SW_LIMIT, F_OK) == -1) {
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if (errno == ENOENT)
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tst_res(TCONF,
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"memcg swap accounting is disabled");
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else
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tst_brk(TBROK | TERRNO, "access");
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} else {
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SAFE_FILE_PRINTF(MEMCG_SW_LIMIT, "%ld", TESTMEM);
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testoom(0, 1, ENOMEM, 1);
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}
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/* OOM for MEMCG with mempolicy */
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if (is_numa(NULL, NH_MEMS, 2)) {
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tst_res(TINFO, "OOM on MEMCG & mempolicy...");
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testoom(MPOL_BIND, 0, ENOMEM, 1);
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testoom(MPOL_INTERLEAVE, 0, ENOMEM, 1);
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testoom(MPOL_PREFERRED, 0, ENOMEM, 1);
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}
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}
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static void setup(void)
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{
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overcommit = get_sys_tune("overcommit_memory");
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set_sys_tune("overcommit_memory", 1, 1);
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mount_mem("memcg", "cgroup", "memory", MEMCG_PATH, MEMCG_PATH_NEW);
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memcg_mounted = 1;
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}
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static void cleanup(void)
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{
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if (overcommit != -1)
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set_sys_tune("overcommit_memory", overcommit, 0);
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if (memcg_mounted)
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umount_mem(MEMCG_PATH, MEMCG_PATH_NEW);
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}
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static struct tst_test test = {
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.needs_root = 1,
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.forks_child = 1,
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.timeout = -1,
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.setup = setup,
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.cleanup = cleanup,
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.test_all = verify_oom,
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};
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#else
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TST_TEST_TCONF(NUMA_ERROR_MSG);
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#endif
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