What were you trying to do that didn't work?

Upon reboot, the following error is seen:
"IRQBALANCE_BANNED_CPUS is discarded, Use IRQBALANCE_BANNED_CPULIST instead"

Partner manually updated the system to use the IRQBALANCE_BANNED_CPULIST setting for the irqbalance service this is reverted after reboots. Partner suspects tuned is setting the wrong variable in the configuration.

IRQBALANCE_BANNED_CPUS is deprecated

From the partner case:

1. find . -type f | xargs grep _BANNED_CPUS
   grep: ./firmware/brcm/brcmfmac43241b4-sdio.Intel: No such file or directory
   ...
   grep: ./python3.9/site-packages/setuptools/script: No such file or directory
   grep: (dev).tmpl: No such file or directory
   grep: ./python3.9/site-packages/tuned/plugins/_pycache_/plugin_irqbalance.cpython-39.opt-1.pyc: binary file matches
   grep: ./python3.9/site-packages/tuned/plugins/_pycache_/plugin_irqbalance.cpython-39.pyc: binary file matches
   ./python3.9/site-packages/tuned/plugins/plugin_irqbalance.py: return sysconfig + "IRQBALANCE_BANNED_CPUS=%s\n" % banned_cpumask
   ./python3.9/site-packages/tuned/plugins/plugin_irqbalance.py: if not re.match(r"\s*IRQBALANCE_BANNED_CPUS=", line):
   ./tuned/functions: sed -i '/^IRQBALANCE_BANNED_CPUS=/d' /etc/sysconfig/irqbalance || return
   ./tuned/functions: echo "IRQBALANCE_BANNED_CPUS=$1" >> /etc/sysconfig/irqbalance

What is the impact of this issue to you?

This warning may indicate that the system may not be configured for optimal performance.

Please provide the package NVR for which the bug is seen:

tuned

How reproducible is this bug?:

Steps to reproduce

1. edit the /etc/sysconfig/rqbalance file to add a line "IRQBALANCE_BANNED_CPULIST="
2. remove the line IRQBALANCE_BANNED_CPUS= …
3. save the file and reboot
4. IRQBALANCE_BANNED_CPUS is reenabled in /etc/sysconfig/rqbalance

Expected results

Reboots would set the IRQBALANCE_BANNED_CPULIST in irqbalance instead of IRQBALANCE_BANNED_CPUS

Actual results

IRQBALANCE_BANNED_CPUS is reenabled in /etc/sysconfig/rqbalance