GRUB_CMDLINE_LINUX="... memmap=8G$8G"

[John Groves]

I'm trying and failing to get "memmap=8G$8G" passed to the kernel on its
command line.

I have a vague ancient recollection of needing to do "memmap=8G\\\$8G, but
it's not working now. I've tried lots of escape combinations but no luck.

I've even put "memmap=8G!8G" in /etc/default/grub, run grub2-mkconfig, and
then used hexedit on /boot/efi/EFI/fedora/grub.cfg to change the '!' to
'$', but STILL the kernel sees the '!'

Is this a bug or regression in grub2? I hope I'm just overlooking something
obvious.

Please help!

$ rpm -qa | grep grub
grubby-8.40-72.fc39.x86_64
grub2-common-2.06-109.fc39.noarch
grub2-pc-modules-2.06-109.fc39.noarch
grub2-tools-minimal-2.06-109.fc39.x86_64
grub2-tools-2.06-109.fc39.x86_64
grub2-pc-2.06-109.fc39.x86_64

Thank you,
John Groves