There seem to be a few configuration files that might affect the behaviour of gssproxy/rpc.gssd.

The following leap to mind (any others?):
/etc/gssproxy/*.conf
/etc/nfs.conf
/etc/idmapd.conf

If an operator would like to have changes to those files take effect immediately (without a reboot), which processes should be restarted? Or HUP'd?

Should gssproxy be restarted whenever rpc.gssd is restarted (or vice versa).

I've searched through the relevant RHEL8 man pages, but I see no guidance on this.

Also, besides the expected brief outage caused by bouncing these processes, are there any caveats about restarting them on a running system?

Thanks in advace for any info!