Elasticsearch and marvel; unsuported OS/hardware

Hi,

I'm getting no data on GET _nodes/stats/os

"os": {
    "timestamp": 1440590938407
 }

its AIX power 8 platform, Ubuntu 15.04 (little indian)

but on my fedora I'm getting

"os": {
            "timestamp": 1440590846083,
            "uptime_in_millis": 188480,
            "load_average": [
               0,
               0,
               0
            ],
            "cpu": {
               "sys": 2,
               "user": 3,
               "idle": 92,
               "usage": 5,
               "stolen": 0
            },
            "mem": {
               "free_in_bytes": 2095243264,
               "used_in_bytes": 14659518464,
               "free_percent": 35,
               "used_percent": 64,
               "actual_free_in_bytes": 5903880192,
               "actual_used_in_bytes": 10850881536
            },
            "swap": {
               "used_in_bytes": 126976,
               "free_in_bytes": 8388476928
            }

thanks any bye
Darko