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Re: removing modules

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On Sat, Jul 03, 2021 at 05:50:44PM +0100, mick crane wrote:
> I looked because "apt upgrade" failed to install things in /boot
> because no room left. I deleted the oldest kernel stuff of the 3 there
> and "apt upgrade" worked.

Kernel is here:

$ du -sxh /boot/vmlinuz-5.10.0-0.bpo.7-amd64 
6.5M    /boot/vmlinuz-5.10.0-0.bpo.7-amd64

Modules are here:

$ du -sxh /lib/modules/5.10.0-0.bpo.7-amd64/
290M    /lib/modules/5.10.0-0.bpo.7-amd64/

You must mean initrd, which contains selected kernel modules and is used
in the boot process:

$ du -sxh /boot/initrd.img-5.10.0-0.bpo.7-amd64 
36M     /boot/initrd.img-5.10.0-0.bpo.7-amd64


> I was thinking then to remove the unwanted modules to make the kernels smaller.

It does not work like this, no amount of modprobing or removing *ko
files would make an installed kernel smaller.
You could build your own kernel, of course, then things would be
different.


> If remove modules from kernel are the gone or are they still on disk and could be put back ?

Modprobe, insmod and rmmod merely change the state of the running
kernel (i.e. - in-memory).

What you probably want described at initramfs.conf(5), MODULES section.

Reco

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Thread

removing modules mick crane <mick.crane@gmail.com> - 2021-07-03 18:10 +0200
  Re: removing modules Reco <recoverym4n@enotuniq.net> - 2021-07-03 18:20 +0200
  Re: removing modules The Wanderer <wanderer@fastmail.fm> - 2021-07-03 18:30 +0200
    Re: removing modules The Wanderer <wanderer@fastmail.fm> - 2021-07-03 19:10 +0200
      Re: removing modules The Wanderer <wanderer@fastmail.fm> - 2021-07-03 19:40 +0200
      Re: removing modules The Wanderer <wanderer@fastmail.fm> - 2021-07-03 19:40 +0200
    Re: removing modules IL Ka <kazakevichilya@gmail.com> - 2021-07-03 19:10 +0200
      Re: removing modules Hans <hans.ullrich@loop.de> - 2021-07-03 20:10 +0200
        Re: removing modules Sven Hartge <sven@svenhartge.de> - 2021-07-03 20:50 +0200
    Re: removing modules Reco <recoverym4n@enotuniq.net> - 2021-07-03 19:10 +0200
    Re: removing modules Greg Wooledge <greg@wooledge.org> - 2021-07-03 19:20 +0200
      Re: removing modules Greg Wooledge <greg@wooledge.org> - 2021-07-03 20:10 +0200
        Re: removing modules Stefan Monnier <monnier@iro.umontreal.ca> - 2021-07-03 20:30 +0200
          Re: removing modules Stefan Monnier <monnier@iro.umontreal.ca> - 2021-07-03 22:40 +0200
          Re: removing modules David Wright <deblis@lionunicorn.co.uk> - 2021-07-04 17:30 +0200
      Re: removing modules Brian <ad44@cityscape.co.uk> - 2021-07-03 21:10 +0200
        Re: removing modules Tom Dial <tddial@comcast.net> - 2021-07-04 05:10 +0200
          Re: removing modules Brian <ad44@cityscape.co.uk> - 2021-07-04 11:10 +0200
            Re: removing modules Tixy <tixy@yxit.co.uk> - 2021-07-04 14:50 +0200
              Re: removing modules Brian <ad44@cityscape.co.uk> - 2021-07-04 20:50 +0200
                Re: removing modules Brad Rogers <brad@fineby.me.uk> - 2021-07-04 21:20 +0200
                Re: removing modules Brian <ad44@cityscape.co.uk> - 2021-07-04 22:20 +0200
                Re: removing modules David Wright <deblis@lionunicorn.co.uk> - 2021-07-05 07:00 +0200
                Re: removing modules Brian <ad44@cityscape.co.uk> - 2021-07-05 12:10 +0200
    Re: removing modules David Wright <deblis@lionunicorn.co.uk> - 2021-07-03 19:40 +0200
  Re: removing modules IL Ka <kazakevichilya@gmail.com> - 2021-07-03 18:30 +0200

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