Experimental Physics and
Industrial Control System

Maren Purves <[email protected]> · Fri, 29 Jan 2016 13:14:23 -1000

On 01/29/16 13:04, J. Lewis Muir wrote:

On 1/29/16 3:54 PM, Till Straumann wrote:

- the code uses these features (RT scheduling + mlockall) *only*
   if you give it sufficient privilege to use them. If it has the
   privileges then the code assumes you want it to use them.

This is perhaps the real issue: the code assumes it should use
something just because it has sufficient privileges to do so.  If I'm
understanding things correctly, if I want to run something as root (or
with certain capabilities) *without* RT, I can't do it.  But a toggle
for RT would allow me to do it.

Agree with Lewis that something like this should not be automatic.

Imagine a user (like e.g. a system administrator) with privileges
runs something that includes this and it all works fine. Then somebody
else  (e.g. a telescope operator) without the same privileges runs it
and it doesn't. To even trouble shoot what exactly the problem is I'd
have to find a non-privileged account and run it ... turning it on and
off via an option would be much easier (and if it needs it we can
always install it with privilege and the option).

Aloha,
Maren

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System