On Fri, Sep 20, 2024 at 08:08:08AM -0700, Marc Shapiro via Dng wrote:
> Several years ago I was trying to premount a separate partition for
> /lib/modules.  I have multiple releases bootable on the system and I wanted
> a single place to store the modules, since they can take up a lot of disk
> space.
>
> I tried everything that I could think of, or find online, but nothing
> worked.  I gave up on it, then, all of a sudden, it was premounting!  The
> odd thing is that it is NOT being done the same as /usr (in
> /usr/share/initramfs-tools/init). In fact, since I had given up on it there
> is NO entry for it at all in /etc/fstab!
>
> It has been this was since Daedalus, maybe since Chimaera, and is still
> premounting without an /etc/fstab entry in Excalibur (although it is on
> /usr/lib/modules in Excalibur).
>
> Does anyone have any idea how this could be happening? I'm not complaining,
> since it was what I originally wanted to do, but I would like to know HOW it
> is happening. Even / has to have an entry in fstab. How can this be mounting
> without an entry?

It's not hard to have rootfs /lib/modules mounted by initramfs init
scripting or (post-pivot) startup scripting; the initramfs
/lib/modules only needs to include modules to access the rootfs
drive(s). Though I can't say how it's done on your system.

>
> Marc

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