int main(int argc, char *argv[])
{
int lc;
int size = 128, num = 3, unit = 1;
unsigned long nmask[MAXNODES / BITS_PER_LONG] = { 0 };
unsigned int node;
tst_parse_opts(argc, argv, ksm_options, ksm_usage);
node = get_a_numa_node(tst_exit);
set_node(nmask, node);
setup();
for (lc = 0; TEST_LOOPING(lc); lc++) {
tst_count = 0;
check_ksm_options(&size, &num, &unit);
if (set_mempolicy(MPOL_BIND, nmask, MAXNODES) == -1) {
if (errno != ENOSYS)
tst_brkm(TBROK | TERRNO, cleanup,
"set_mempolicy");
else
tst_brkm(TCONF, cleanup,
"set_mempolicy syscall is not "
"implemented on your system.");
}
create_same_memory(size, num, unit);
write_cpusets(node);
create_same_memory(size, num, unit);
}
cleanup();
tst_exit();
}
void oom(int testcase, int mempolicy, int lite)
{
pid_t pid;
int status;
#if HAVE_NUMA_H && HAVE_LINUX_MEMPOLICY_H && HAVE_NUMAIF_H \
&& HAVE_MPOL_CONSTANTS
unsigned long nmask = 0;
unsigned int node;
if (mempolicy)
node = get_a_numa_node(cleanup);
nmask += 1 << node;
#endif
switch (pid = fork()) {
case -1:
tst_brkm(TBROK | TERRNO, cleanup, "fork");
case 0:
#if HAVE_NUMA_H && HAVE_LINUX_MEMPOLICY_H && HAVE_NUMAIF_H \
&& HAVE_MPOL_CONSTANTS
if (mempolicy)
if (set_mempolicy(MPOL_BIND, &nmask, MAXNODES) == -1)
tst_brkm(TBROK | TERRNO, cleanup,
"set_mempolicy");
#endif
_test_alloc(testcase, lite);
exit(0);
default:
break;
}
tst_resm(TINFO, "expected victim is %d.", pid);
if (waitpid(-1, &status, 0) == -1)
tst_brkm(TBROK | TERRNO, cleanup, "waitpid");
if (testcase == OVERCOMMIT) {
if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
tst_resm(TFAIL, "the victim unexpectedly failed: %d",
status);
} else {
if (!WIFSIGNALED(status) || WTERMSIG(status) != SIGKILL)
tst_resm(TFAIL, "the victim unexpectedly failed: %d",
status);
}
}
void testoom(int mempolicy, int lite, int numa)
{
long nodes[MAXNODES];
if (numa && !mempolicy)
write_cpusets(get_a_numa_node(cleanup));
tst_resm(TINFO, "start normal OOM testing.");
oom(NORMAL, mempolicy, lite);
tst_resm(TINFO, "start OOM testing for mlocked pages.");
oom(MLOCK, mempolicy, lite);
if (access(PATH_KSM, F_OK) == -1)
tst_brkm(TCONF, NULL, "KSM configuration is not enabled");
tst_resm(TINFO, "start OOM testing for KSM pages.");
oom(KSM, mempolicy, lite);
}
