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

By default 

GRUB_ENABLE_BLSCFG=true

 present in the

/etc/default/grub

file.

if run command 

grub2-mkconfig -o /boot/grub2/grub.cfg

then records in the /boot/loader/entries/ not updated at all.

if run command 

grub2-mkconfig -o /boot/grub2/grub.cfg --update-bls-cmdline

then
 

$tuned_params

text dropped from settings in the /boot/loader/entries/ files and tuned settings are not applied after reboot.

What is the impact of this issue to you?

grub2-mkconfig damage tuned settings in the /boot/loader/entries/ files

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

grub2-tools-2.06-92.el9.x86_64

How reproducible is this bug?:

Always, each run of command:

grub2-mkconfig -o /boot/grub2/grub.cfg --update-bls-cmdline

Steps to reproduce

tuned-adm profile network-latency

grep -r tuned_params /boot/loader/entries/

grub2-mkconfig -o /boot/grub2/grub.cfg --update-bls-cmdline

grep -r tuned_params /boot/loader/entries/

Expected results

expected first and second grep run show identical results.

Actual results

actual - first grep run show $tuned_params present in the output, second grep run show what $tuned_params is absent.

Workaround

run

grub2-mkconfig -o /boot/grub2/grub.cfg --update-bls-cmdline
tuned-adm profile network-latency

to workaround this grub2-mkconfig bug.