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List:       dng
Subject:    Re: [DNG] upcoming usr merge requirements
From:       o1bigtenor via Dng <dng () lists ! dyne ! org>
Date:       2023-11-29 12:19:03
Message-ID: CAPpdf5-ZcmoDN7nTyvLrDyRe2JFct1YCLYwRYM0cCRSbp5vsHQ () mail ! gmail ! com
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On Tue, Nov 28, 2023 at 12:48 PM Didier Kryn <kryn@in2p3.fr> wrote:
> 
> Le 28/11/2023 à 03:43, Steve Litt a écrit :
> 
> I'm speaking for Linux, not for the Debian or Devuan packaging...
> 
> If you choose to have your /usr on a separate partition mounting on
> mountpoint /usr, it should be no problem at all because your initramfs
> will boot off its own OS, and then mount /dev/sda5 /usr, and then
> pivotroot back to the hard disk, which now has /usr mounted in the
> correct place. No big deal: It's been done for years: Long before
> usrmerge.
> 
> Now of course if a specific distro's packaging system and installer has
> a problem with such a setup, you'll need to do some DIY on that distro.
> But I doubt even Debian is stupid enough to seriously bork this
> customary technique.
> 
> It's exactly that.
> 
> My own comment is: it is only if you decide to tweak the boot sequence that you \
> need to take care. 
> The boot sequence is nowadays done in two steps:
> 
> 1) boot into a first partition which, for distros, is always an initramfs; perform \
> some mounts and maybe other things; 
> 2) pivot-root to the final partition and continue the init sequence there.
> 
> Note that, if you decide to craft your own first step, the initial partition is not \
> necessarily an initramfs, provided your kernel is able to mount it, i.e. it has the \
> drivers built-in, which implies you must build it from source.


(I am trying to understand this stuff - - - argh - - - -computers have
been tools for me - - - - argh!).

So If this is what I see in /var/log/boot :

Wed Nov 15 06:01:50 2023: Starting boot logger: bootlogd
Wed Nov 15 06:01:50 2023: ^@Setting up keyboard layout...done.
Wed Nov 15 06:01:50 2023: Activating swap...done.
Wed Nov 15 06:01:50 2023: Checking file systems...fsck.fat 4.2 (2021-01-31)
Wed Nov 15 06:01:50 2023: /dev/nvme0n1p2: 8 files, 11893/479892 clusters
Wed Nov 15 06:01:50 2023: /boot: clean, 356/61056 files, 57802/243968 blocks
Wed Nov 15 06:01:50 2023: /tmp: clean, 1645/305216 files, 266385/1219328 blocks
Wed Nov 15 06:01:50 2023: /usr/local: clean, 8738/305216 files,
310861/1219328 blocks
Wed Nov 15 06:01:50 2023: /var: clean, 14413/610800 files, 667782/2439168 blocks
Wed Nov 15 06:01:50 2023: done.
Wed Nov 15 06:01:50 2023: Cleaning up temporary files....
Wed Nov 15 06:01:51 2023: Loading kernel module lp.
Wed Nov 15 06:01:51 2023: Loading kernel module ppdev.
Wed Nov 15 06:01:51 2023: Loading kernel module parport_pc.
Wed Nov 15 06:01:51 2023: Loading kernel module nct6775.
Wed Nov 15 06:01:51 2023: Mounting local filesystems...done.

is this the booting into an initramfs? (Wed Nov 15 06:01:50 2023:
/dev/nvme0n1p2: 8 files, 11893/479892 clusters )

TIA
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