Re: failed NUMA pages inquiry status: Operation not permitted

> So maybe all that's needed is a get_mempolicy() call in
> pg_numa_available() ?

numactl 2.0.19 --show does this:

if (numa_available() < 0) {
show_physcpubind();
printf("No NUMA support available on this system.\n");
exit(1);
}

int numa_available(void)
{
if (get_mempolicy(NULL, NULL, 0, 0, 0) < 0 && (errno == ENOSYS || errno == EPERM))
return -1;
return 0;
}

pg_numa_available is already calling numa_available.

But numactl 2.0.16 has this:

int numa_available(void)
{
if (get_mempolicy(NULL, NULL, 0, 0, 0) < 0 && errno == ENOSYS)
return -1;
return 0;
}

... which is not catching the "permission denied" error I am seeing.

So maybe PG should implement numa_available itself like that. (Or
accept the output difference so the regression tests are passing.)

Christoph