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Old 12-28-2019, 07:05 AM   #1
monty
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Default arch realtime-privileges & system settings?

My log files are flooded with PAM audit messages
Code:
[20190.978249] audit: type=1131 audit(1577540170.084:1344): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-hostnamed comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
I have installed the realtime-privileges package do I still have to add all these system settings below manually?
User has been added to the audio and realtime group

Code:
sudo nano /etc/security/limits.conf
session required	pam_limits.so (<<<< especially this one)
@audio - rtprio 95
@audio - memlock unlimited

sudo nano /etc/udev/rules.d/40-timer-permissions.rules
KERNEL=="rtc0", GROUP="audio"
KERNEL=="hpet", GROUP="audio"

sudo nano /etc/rc.local
echo 2048 > /sys/class/rtc/rtc0/max_user_freq
echo 2048 > /proc/sys/dev/hpet/max-user-freq
should or can I use the preload package w/ an audio workstation?
https://sourceforge.net/projects/preload/
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Old 12-28-2019, 07:21 AM   #2
cfillion
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Audit messages are unrelated to realtime-privileges. To enable these privileges (once that package has been installed), just add your user to the realtime group.

You can turn off audit messages by adding audit=0 to your kernel command line (or masking systemd-journald-audit.socket).

Last edited by cfillion; 12-28-2019 at 07:30 AM.
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Old 12-28-2019, 07:33 AM   #3
monty
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Quote:
Originally Posted by cfillion View Post
Audit messages are unrelated to realtime-privileges. To enable these privileges once that package has been installed, just add your user to the realtime group.

You can turn off audit messages by adding audit=0 to your kernel command line (or masking systemd-journald-audit.socket).
many thanks!
should I remove following stuff and username from the audio group too?
Code:
session required	pam_limits.so
@audio - rtprio 95
@audio - memlock unlimited
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Old 12-28-2019, 10:11 AM   #4
monty
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yeah looks much better now, so any important logs for debugging are no longer covered by flooding pam audits.
I use the standard linux-rt (5.2.21-rt14) kernel from manjaro community sources.
I switched back from arch to manjaro because it makes some things more comfortable.
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Old 12-28-2019, 01:23 PM   #5
Jack Winter
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I don't use Manjaro so I have no clue about it.

Still in Archlinux you ought to add the realtime-privileges package, add your user to the realtime group and drop the rest of the above. We did drop the audio group stuff as it might conflict with how the system allows access to soundcards for multi user systems.

AFAIK, /etc/rc.local isn't used at all anymore, unless you added a systemd unit to make it run.
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Old 12-29-2019, 09:21 AM   #6
monty
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thanks guys, everything works perfectly without additional configurations!
yep, rc.local is active I use it for unbinding IRQs and disable an onboard device also for setting up my extra numpads for my shortcuts, it's easier to handle w/ only one file instead of systemd startup actions
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Old 12-29-2019, 01:52 PM   #7
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Hehe, I have a /usr/local/bin/rc.conf (out of sentimental reasons) that runs a few startup commands. I made a systemd unit to run it many years ago.
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