108 lines
3.0 KiB
C
108 lines
3.0 KiB
C
/*
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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 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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testoom(0, 0, ENOMEM, 1);
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if (SAFE_CG_HAS(tst_cg, "memory.swap.max")) {
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tst_res(TINFO, "OOM on MEMCG with special memswap limitation:");
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/*
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* Cgroup v2 tracks memory and swap in separate, which splits
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* memory and swap counter. So with swappiness enable (default
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* value is 60 on RHEL), it likely has part of memory swapping
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* out during the allocating.
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*
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* To get more opportunities to reach the swap limitation,
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* let's scale down the value of 'memory.swap.max' to only
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* 1MB for CGroup v2.
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*/
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if (!TST_CG_VER_IS_V1(tst_cg, "memory"))
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SAFE_CG_PRINTF(tst_cg, "memory.swap.max", "%lu", MB);
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else
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SAFE_CG_PRINTF(tst_cg, "memory.swap.max", "%lu", TESTMEM + MB);
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testoom(0, 1, ENOMEM, 1);
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if (TST_CG_VER_IS_V1(tst_cg, "memory"))
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SAFE_CG_PRINTF(tst_cg, "memory.swap.max", "%lu", ~0UL);
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else
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SAFE_CG_PRINT(tst_cg, "memory.swap.max", "max");
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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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SAFE_CG_PRINTF(tst_cg, "cgroup.procs", "%d", getpid());
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SAFE_CG_PRINTF(tst_cg, "memory.max", "%lu", TESTMEM);
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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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}
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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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.max_runtime = TST_UNLIMITED_RUNTIME,
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.setup = setup,
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.cleanup = cleanup,
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.test_all = verify_oom,
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.needs_cgroup_ctrls = (const char *const []){ "memory", NULL },
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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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