[MESOS-5556] Fix method of populating device entries for `/dev/nvidia-uvm`, etc.

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.0.0
• Labels: gpu mesosphere
• Epic Link: GPU
• Sprint: Mesosphere Sprint 36, Mesosphere Sprint 37
• Story Points: 2
• Assignee: Kevin Klues
• Reporter: Kevin Klues
• Shepherd: Benjamin Mahler
• Created: 07/Jun/16 21:29
• Updated: 14/Jun/16 20:43
• Resolved: 14/Jun/16 20:43

Description

Currently, the major/minor numbers of `/dev/nvidiactl` and `/dev/nvidia-uvm` are hard-coded. This causes problems for `/dev/nvidia-uvm` because its major number is part of the "Experimental" device range on Linux.

Because this range is experimental, there is no guarantee which device
number will be assigned to it on a given machine. We should use `os:stat::rdev()` to extract the major/minor numbers programatically.