tree f7c2afc03148230b0a05d3247d8166aeeec01d1e
parent 0b1a91b28752a98df02e6210e3fb06d65806a449
author Jan Stancek <jstancek@redhat.com> 1456221631 +0100
committer Jan Stancek <jstancek@redhat.com> 1457016922 +0100

numa_helper: don't break is_numa() with TCONF

Li reported, that some oom tests on aarch64 exit with TCONF
during is_numa() call, because get_mempolicy syscall is not
implemented. And because numa_helper used ltp_syscall() it
terminated the test in all instances.

Make sure we check that NUMA is available first with
numa_available(). In case it's not supported return empty
set of nodes.

Also ignore ENOSYS from get_mempolicy. At the moment this is
redundant, because numa_available() implementation is based
on availability of get_mempolicy as well, but extra check
doesn't hurt in case it would change in future.

Reported-by: Li Wang <liwang@redhat.com>
Signed-off-by: Jan Stancek <jstancek@redhat.com>
Acked-by: Cyril Hrubis <chrubis@suse.cz>