Dear Javier,
Many thanks for your very helpful answer.
With regards to whether $default_kernelopts is still used, it is definitely still used in CentOS 8 - wider than that I cannot yet report.
I will attempt to look for a more appropriate forum for discussion!
Mike
---------- Forwarded message ----------
From: Javier Martinez Canillas <javier@dowhile0.org>
To: The development of GNU GRUB <grub-devel@gnu.org>, mjsbeaton@gmail.com
Cc:
Bcc:
Date: Wed, 18 Aug 2021 09:03:15 +0200
Subject: Re: blscfg module $early_initrd and $default_kernelopts variables
Hello Mike,
On Wed, Aug 11, 2021 at 3:17 PM Mike Beaton <mjsbeaton@gmail.com> wrote:
>
> I was wondering if anybody could possibly help out and clarify, is there any official documentation around the existence, and correct use, of the blscfg $early_initrd and $default_kernelopts variables?
>
The blscfg module is not in upstream GRUB yet and it's only present in
the downstream package of some distros (e.g: Fedora Linux, Endless
OS). The mailing list is not a proper venue to discuss downstream
specific features and instead should be reported for your distribution
(i.e: Fedora's bugzilla).
> https://github.com/rhboot/grub2/blob/fedora-35/grub-core/commands/blscfg.c#L764
This variable is not used anymore and is only there for backward
compatibility. Now in Fedora the kernel command line parameter is
stored in the BLS snippets instead.
> https://github.com/rhboot/grub2/blob/fedora-35/grub-core/commands/blscfg.c#L788
>
The goal of this variable was to support the
GRUB_EARLY_INITRD_LINUX_CUSTOM option in /etc/default/grub, and so the
/etc/grub.d/10_linux script looks at this and sets the early_initrd
variable. So the use should be to set that option and then run
grub2-mkconfig as you would do on a non-BLS setup.
But I believe that instead the correct way should be for the BLS
snippet created to contain two devicetree options, and drop the
$early_initrd variable as well.
Best regards,
Javier
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