On 2020-04-22, Liu Yiding <yidingx.liu@intel.com> wrote:
> # openat2 unexpectedly returned # -95 (Operation not supported)
> not ok 106 openat2 with valid how.mode and O_TMPFILE succeeds

I believe some filesystems don't support O_TMPFILE, hence -EOPNOTSUPP.
Try using a different filesystem.

-- 
Aleksa Sarai
Senior Software Engineer (Containers)
SUSE Linux GmbH
<https://www.cyphar.com/>