Re: GPT attributes in dkwedge [PATCH]

[Michael van Elst <mlelstv%serpens.de@localhost>]

On Mon, Sep 25, 2023 at 05:57:49AM +0000, Emmanuel Dreyfus wrote:

> On Mon, Sep 25, 2023 at 12:20:00PM +0700, Robert Elz wrote:
> [bootme flag]
> > I'd always assumed it to be where efiboot should locate boot.cfg.
> > Where the kernel and root filesystems are located are in boot.cfg.
> 
> Bootme tels bootstrap where to look root partition. bootme.cfg is 
> searched in EFI paririon /EFI/NetBSD/boot.cfg  and root partition /boot.cfg. 

Boot partition and Root partition are something separate, even when the
default root partition is the same as the boot partition.

For EFI boot, the boot partition is where boot.cfg is searched
and where the kernel is loaded from, unless you specify something else
to the bootloader (e.g. in boot.cg). Where the kernel is loaded
from is passed to the kernel.

The kernel will use the informatiun to find the root partition,
unless you specify something else (or magic like the raidframe
hack comes into play).

So, the bootme flag effectively specifies the root partition, but only
by virtue of defaults being passed down the chain. The kernel should
not outguess things and interpret the flag itself.


-- 
                                Michael van Elst
Internet: mlelstv%serpens.de@localhost
                                "A potential Snark may lurk in every tree."