Manual Pages  — MAC_PRIORITY

To compile the mac_priority policy into your kernel, place the following lines in your kernel configuration file: options MAC options MAC_PRIORITY

Alternately, to load the mac_priority policy module at boot time, place the following line in your kernel configuration file: options MAC

and in loader.conf(5):

mac_priority_load="YES"

The mac_priority policy grants scheduling privileges based on group(5) membership. Users or processes in the group 'realtime' (gid 47) are allowed to run threads and processes with realtime scheduling priority. Users or processes in the group 'idletime' (gid 48) are allowed to run threads and processes with idle scheduling priority.

With the mac_priority realtime policy active, privileged users may use the rtprio(1) utility to start processes with realtime priority. Privileged applications can promote threads and processes to realtime priority through the rtprio(2) system calls.

When the idletime policy is active, privileged users may use the idprio(1) utility to start processes with idle priority. Privileged applications can demote threads and processes to idle priority through the rtprio(2) system calls.

The following sysctl(8) MIBs are available for fine-tuning this MAC policy. All sysctl(8) variables can also be set as loader(8) tunables in loader.conf(5).

security.mac.priority.realtime
	Enable the realtime policy. (Default: 1).
security.mac.priority.realtime_gid
	The numeric gid of the realtime group. (Default: 47).
security.mac.priority.idletime
	Enable the idletime policy. (Default: 1).
security.mac.priority.idletime_gid
	The numeric gid of the idletime group. (Default: 48).

idprio(1), rtprio(1), rtprio(2), mac(4)