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Created attachment 1258681 [details]
Proposed fix

Description of problem:
Linux supports initrd overlays. User could have her/his own initrd overlay extending distro's provided initrd image. By using custom overlays user doesn't need to rebuild the main initrd image (which can take long time) nor need to customize it every time after e.g. kernel update.

We are going to use this functionality in RHEL to introduce performance / realtime related tunings into initrd. Grub2 seems to support it, but unfortunately i doesn't have configuration option for grub2-mkconfig.

Version-Release number of selected component (if applicable):
grub2-2.02-0.44.el7

How reproducible:
Always

Steps to Reproduce:
1. Try to install initrd overlay by using grub2-mkconfig

Actual results:
There is no way how to install initrd overlay by using grub2-mkconfig

Expected results:
An option in /etc/default/grub that will allow setting initrd overlay.

Additional info:
Attached patch adds support for GRUB_INITRD_OVERLAY option which could be used in /etc/default/grub to add the initrd overlay when running grub2-mkconfig.

We would like to use this functionality in RFE bug 1414098.

Is there a reason not to accept the proposed fix?  There is an inconsistency that can affect users when tuned runs with the [bootloader] plugin and an admin re-creates /boot/grub2/grub.cfg by grub2-mkconfig.  Thanks!

After evaluating this issue, there are no plans to address it further or fix it in an upcoming release.  Therefore, it is being closed.  If plans change such that this issue will be fixed in an upcoming release, then the bug can be reopened.