Bug 2064755

Summary:	nf_conntrack_hashsize in [net] doesn't work when kernel module nf_conntrack isn't loaded
Product:	Red Hat Enterprise Linux 9	Reporter:	Robin Hack <rhack>
Component:	tuned	Assignee:	Jaroslav Škarvada <jskarvad>
Status:	NEW ---	QA Contact:	Robin Hack <rhack>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	9.0	CC:	jeder, jskarvad
Target Milestone:	rc
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Description Robin Hack 2022-03-16 13:49:05 UTC

Description of problem:
Create profile with:
[net]
nf_conntrack_hashsize=131072

enable profile

Take a look at logs:
2022-03-16 09:41:56,931 ERROR    tuned.utils.commands: Error when reading file '/sys/module/nf_conntra
ck/parameters/hashsize': '[Errno 2] No such file or directory: '/sys/module/nf_conntrack/parameters/hashsize''
2022-03-16 09:41:56,931 ERROR    tuned.utils.commands: Writing to file '/sys/module/nf_conntrack/parameters/hashsize' error: '[Errno 2] No such file or directory: '/sys/module/nf_conntrack/parameters/hashsize''


After: 
# modprobe nf_conntrack
there is no issue in logs

Version-Release number of selected component (if applicable):
tuned-2.18.0-1.el9.noarch

How reproducible:
always


Actual results:
Kabooom

Expected results:
No kabooom

Comment 1 Jaroslav Škarvada 2022-05-23 13:24:32 UTC

We have currently +r flag to force reload:
[modules]
MODULE=+r OPTION=VALUE

We could add e.g. the 'f' or 'c' flag to handle this situation, e.g.:
[modules]
MODULE1=+rf OPTION=VALUE
MODULE2=+fr OPTION=VALUE
MODULE3=+f OPTION=VALUE