Bug 2021801

Summary:	[DDF] kernelopts is no longer the default
Product:	Red Hat Enterprise Linux 9	Reporter:	Direct Docs Feedback <ddf-bot>
Component:	Documentation	Assignee:	Jaroslav Klech <jklech>
Documentation sub component:	DDF	QA Contact:
Status:	CLOSED CURRENTRELEASE	Docs Contact:
Severity:	unspecified
Priority:	medium	CC:	jklech, jpazdziora, puplench, rhel-docs, vpolasek
Version:	unspecified	Keywords:	Documentation, Reopened
Target Milestone:	rc
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Last Closed:	2022-05-24 13:46:54 UTC	Type:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Description Direct Docs Feedback 2021-11-10 09:02:11 UTC

Based on bug 1926715 comment 3

  storing the kernel command line
parameters in the grubenv using a kernelopts GRUB environment variable was found to not be robust enough so in Fedora (and RHEL9) this was changed to
store them in the BLS snippet instead.

So any mentions of kernelopts should be removed, or at least moved from the current prominent location on https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9-beta/html/managing_monitoring_and_updating_the_kernel/configuring-kernel-command-line-parameters_managing-monitoring-and-updating-the-kernel to some lower-profile place since the mechanism presumably works (at least on GRUB-based systems) but is not the default and is not recommended.

Reported by: rhn-engineering-jpazdziora

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9-beta/html/managing_monitoring_and_updating_the_kernel/configuring-kernel-command-line-parameters_managing-monitoring-and-updating-the-kernel#annotations:2835d2ce-f58f-4445-80e6-90885e48337c

Comment 1 Jan Pazdziora (Red Hat) 2021-11-10 09:05:50 UTC

The contents of a boot entry config example is different in

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9-beta/html/managing_monitoring_and_updating_the_kernel/configuring-kernel-command-line-parameters_managing-monitoring-and-updating-the-kernel

compared to RHEL 8 version

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/managing_monitoring_and_updating_the_kernel/configuring-kernel-command-line-parameters_managing-monitoring-and-updating-the-kernel

and

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/system_design_guide/configuring-kernel-command-line-parameters_system-design-guide

so some edits to that content were made for RHEL 9 but they don't seem to fully capture the change that is happening in RHEL 9.

Comment 13 Jaroslav Klech 2022-05-24 13:46:54 UTC

The republished version can be seen here:

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/managing_monitoring_and_updating_the_kernel/configuring-kernel-command-line-parameters_managing-monitoring-and-updating-the-kernel