Re: [gentoo-user] Re: Exact setting in grub to default to a kernel by name?

[Neil Bothwick <neil@digimed.co.uk>]

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On Sun, 13 Jun 2021 22:34:30 -0400, Walter Dnes wrote:

> > > 1) Is "insmod extfs3" necessary? I've built extfs3 into the
> > > kernels.  
> > 
> > If the kernel is on an ext3 filesystem, yes. This is GRUB's module, it
> > uses it to read an ext3 filesystem in order to load the kernel.  
> 
>   Some confusion here.  "fdisk -l" on my new machine gives...
> 
> Device          Start        End    Sectors   Size Type
> /dev/sda1        2048     526335     524288   256M EFI System
> /dev/sda2      526336 1886416303 1885889968 899.3G Linux filesystem
> /dev/sda3  1886418352 1953523119   67104768    32G Linux filesystem
> 
>   The EFI Systen partition is fat32.  The web examples I read show
> "insmod <filesystem>" matching the filesystem of the linux system being
> booted.  But all entries in grub.cfg on my new machine are "insmod fat".
> I wonder if the web documentation was referring to BIOS-booting
> machines. grub.cfg would be sitting on an xfs or extfs3 or whatever
> file system, and would need to read it off that filesystem.

If /boot is on the ESP, i.e. FAT, you won't need the ext3 module. I
suspect part of the auto-configuration setup is "load everything we
might need". It's not really an issue since the memory used by the
modules should be freed when GRUB exits.

The bloatedness is a combination of the must run everywhere defaults and
using a full bootloader when you only need a minimal boot manager. These
days, I only use GRUB on BIOS systems.


-- 
Neil Bothwick

No, you *can't* call 999 now. I'm downloading my mail.

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