Bug 2123354

Summary: add awareness of new ktimer thread "ktimers" to tuned realtime-virtual profiles
Product: Red Hat Enterprise Linux 9 Reporter: Marcelo Tosatti <mtosatti>
Component: tunedAssignee: Jaroslav Škarvada <jskarvad>
Status: NEW --- QA Contact: Robin Hack <rhack>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 9.1CC: jeder, jskarvad, ppandit
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Marcelo Tosatti 2022-09-01 12:54:47 UTC 
Description of problem:
A new timer thread will be used to
handle per-CPU timers on RT:
https://bugzilla.redhat.com/show_bug.cgi?id=2122220

It is necessary to update the tuned realtime-virtual profiles
to increase the priority of that thread to FIFO/3:

# for i in `pgrep ktimersoftd` ; do grep Cpus_allowed_list /proc/$i/status ; done
group.ktimersoftd=0:f:3:*:ktimersoftd.*

It is also necessary to backport changes to RHEL-8.