Debian Bug report logs - #772628
kmod: support gzip and xz compression in kmod

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: AP <ap@zip.com.au>

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: kmod: support gzip and xz compression in kmod

Date: Tue, 09 Dec 2014 20:56:13 +1100

Package: kmod
Version: 18-3
Severity: wishlist

Hi,

   * What led up to the situation?

Linux 3.18.0 comes with native support for xz compressed modules. I like rolling
my own kernels and I need to use modules for some things. Compression allows me
to drop the size of a kernel's modules dir by 2/3rds. This is nice as I like to
have a few fallback kernels around, just in case.

Also nice for Debian released kernels as the modules for that wind up being huge
on-disk.

   * What exactly did you do (or not do) that was effective (or
     ineffective)?

depmod -a

   * What was the outcome of this action?

No module dependency lists generated.

   * What outcome did you expect instead?

Module dependency list to be generated and xz compressed modules able to be used.

-- System Information:
Debian Release: 8.0
  APT prefers testing-updates
  APT policy: (500, 'testing-updates'), (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.18.0-wb.20141209-011018 (SMP w/4 CPU cores; PREEMPT)
Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages kmod depends on:
ii  libc6     2.19-13
ii  libkmod2  18-3
ii  lsb-base  4.1+Debian13+nmu1

kmod recommends no packages.

kmod suggests no packages.

-- no debconf information

Message #10 received at 772628@bugs.debian.org (full text, mbox, reply):

From: Tomas Janousek <tomi@nomi.cz>

To: 772628@bugs.debian.org

Subject: Patch for kmod package to support compression

Date: Mon, 15 Dec 2014 00:06:28 +0100

[Message part 1 (text/plain, inline)]

Hi,

I'm attaching a patch for the Debian package which enables building with xz/zlib.

-- 
Tomáš Janoušek, a.k.a. Liskni_si, http://work.lisk.in/

[0001-enable-compression.patch (text/x-diff, attachment)]

Message #15 received at 772628@bugs.debian.org (full text, mbox, reply):

From: md@Linux.IT (Marco d'Itri)

To: Tomas Janousek <tomi@nomi.cz>, 772628@bugs.debian.org

Subject: Re: Bug#772628: Patch for kmod package to support compression

Date: Mon, 15 Dec 2014 02:45:21 +0100

[Message part 1 (text/plain, inline)]

On Dec 15, Tomas Janousek <tomi@nomi.cz> wrote:

> I'm attaching a patch for the Debian package which enables building 
> with xz/zlib.
Why enable support for both?

-- 
ciao,
Marco

[Message part 2 (application/pgp-signature, inline)]

Message #20 received at 772628@bugs.debian.org (full text, mbox, reply):

From: Tomas Janousek <tomi@nomi.cz>

To: Marco d'Itri <md@Linux.IT>

Cc: 772628@bugs.debian.org

Subject: Re: Bug#772628: Patch for kmod package to support compression

Date: Mon, 15 Dec 2014 14:14:43 +0100

Hi,

On Mon, Dec 15, 2014 at 02:45:21AM +0100, Marco d'Itri wrote:
> On Dec 15, Tomas Janousek <tomi@nomi.cz> wrote:
> > I'm attaching a patch for the Debian package which enables building 
> > with xz/zlib.
>
> Why enable support for both?

Because we don't know what the users will use.

I used xz as I don't mind waiting a bit when doing make -j4 modules_install
and want to save as much space as possible, but I can very well imagine that
gzip would be a good compromise between speed and compression ratio for many
people.

-- 
Tomáš Janoušek, a.k.a. Liskni_si, http://work.lisk.in/

Message #25 received at 772628@bugs.debian.org (full text, mbox, reply):

From: "Zephaniah E. Loss-Cutler-Hull" <warp@aehallh.com>

To: 772628@bugs.debian.org

Subject: Re: Bug#772628: Patch for kmod package to support compression

Date: Sat, 28 Feb 2015 05:59:46 -0600

[Message part 1 (text/plain, inline)]

I can confirm that the patch works here, and that I need it as well.

Is there anything blocking this being applied that I could help with?

Regards,
Zephaniah E. Loss-Cutler-Hull.

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Message #30 received at 772628@bugs.debian.org (full text, mbox, reply):

From: md@Linux.IT (Marco d'Itri)

To: "Zephaniah E. Loss-Cutler-Hull" <warp@aehallh.com>, 772628@bugs.debian.org

Subject: Re: Bug#772628: Patch for kmod package to support compression

Date: Sun, 1 Mar 2015 18:30:12 +0100

[Message part 1 (text/plain, inline)]

On Feb 28, "Zephaniah E. Loss-Cutler-Hull" <warp@aehallh.com> wrote:

> Is there anything blocking this being applied that I could help with?
I just do not seen a big use case for enabling this feature.

-- 
ciao,
Marco

[Message part 2 (application/pgp-signature, inline)]

Message #35 received at 772628@bugs.debian.org (full text, mbox, reply):

From: "Zephaniah E. Loss-Cutler-Hull" <warp@aehallh.com>

To: Marco d'Itri <md@Linux.IT>, 772628@bugs.debian.org

Subject: Re: Bug#772628: Patch for kmod package to support compression

Date: Sun, 01 Mar 2015 14:39:39 -0600

[Message part 1 (text/plain, inline)]

On 03/01/2015 11:30 AM, Marco d'Itri wrote:
> On Feb 28, "Zephaniah E. Loss-Cutler-Hull" <warp@aehallh.com> wrote:
>
>> Is there anything blocking this being applied that I could help with?
> I just do not seen a big use case for enabling this feature.
>
Well, enabling an option to compress things and then finding out that
kernel module loading is broken isn't exactly fun.

Can we get a big warning in the description (or at least the readme)
that CONFIG_MODULE_COMPRESS must not be enabled, despite the kernel
option description stating that kmod supports this?

Regards,
Zephaniah E. Loss-Cutler-Hull.

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Message #40 received at 772628@bugs.debian.org (full text, mbox, reply):

From: Andreas Mohr <andi@lisas.de>

To: 772628@bugs.debian.org

Subject: Re: Bug#772628: Patch for kmod package to support compression

Date: Thu, 4 Jun 2015 23:15:41 +0200

Since I managed to mess up things
by telling my own new story
rather than having stumbled upon
this detailed pre-existing item
(via proper research, that is...),
I now see it as my duty to at least reference
the new discussion's URL here:
"[PATCH] modules: CONFIG_MODULE_COMPRESS: add hint that userspace support may easily be missing." https://lkml.org/lkml/2015/5/31/90


Given current direction / results of that discussion,
I'd want to vote
for gaining at least *some* amount of compression support
directly in Debian binary package defaults.

Thanks,

Andreas Mohr

Message #45 received at 772628@bugs.debian.org (full text, mbox, reply):

From: Tong Zhang <ztong@vt.edu>

To: 772628@bugs.debian.org

Subject: Re: Bug#772628: Patch for kmod package to support compression

Date: Fri, 14 Aug 2015 19:30:30 -0400

I am running linux on an embedded system with 2GB flash drive. Kernel 
modules installed on this system are gzip format. But I found that kmod 
shipped with debian does not support .ko.gz format yet. I have to 
recompile kmod to make it work.

Message #50 received at 772628@bugs.debian.org (full text, mbox, reply):

From: debian@oss.m-berberich.de

To: 772628@bugs.debian.org

Subject: Re: Bug#772628: Patch for kmod package to support compression

Date: Tue, 26 Jan 2016 11:24:06 +0100

Problem still exists with kmod_22-1.

Message #55 received at 772628@bugs.debian.org (full text, mbox, reply):

From: Stijn Segers <francesco.borromini@protonmail.com>

To: 772628@bugs.debian.org

Subject: Similar issue

Date: Sat, 07 May 2016 15:18:34 -0400

[Message part 1 (text/plain, inline)]

I have been bitten by this too; I run Debian on a Beaglebone Black with 2 GB eMMC storage; it would be really near if I could save some space by using compressed modules.

In light of all the ARM and other non-x86 devices Debian supports nowadays this is a valid issue. Since implementing support is pretty trivial I don't see why this is being ignored.

Thanks for making this happen!

Stijn

[Message part 2 (text/html, inline)]

Message #60 received at 772628@bugs.debian.org (full text, mbox, reply):

From: Josua Mayer <josua.mayer97@gmail.com>

To: 772628@bugs.debian.org

Subject: Use-Case

Date: Wed, 30 Aug 2017 21:48:43 +0200

Hi everyone,

I have once more come across this issue and would like to share with you
why I think this feature should be enabled:

I have several devices with small flash storage: Openmoko GTA02,
Goldelico GTA04, Beaglebone
and quite a few slow SD-Cards class-10, and devices that can't do UHS-1:
Cubox, Cubox-i, RaspberryPi

The first group would benefit by requiring less disk space for the
Kernel. That is either a custom kernel where the vendor enables
comrpessed modules, or in the future the Debian Kernel if maintainers
can be persuaded to enable that feature (which obviously depends on this
very issue).

The second group will benefit from faster updates of kernels (with such
compression enabled).

Maintainers, please reconsider enabling this feature.

Yours sincerely
Josua Mayer

Message #65 received at 772628-close@bugs.debian.org (full text, mbox, reply):

From: Marco d'Itri <md@linux.it>

To: 772628-close@bugs.debian.org

Subject: Bug#772628: fixed in kmod 25-1

Date: Sun, 21 Jan 2018 00:36:22 +0000

Source: kmod
Source-Version: 25-1

We believe that the bug you reported is fixed in the latest version of
kmod, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 772628@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Marco d'Itri <md@linux.it> (supplier of updated kmod package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

Format: 1.8
Date: Sun, 21 Jan 2018 01:02:46 +0100
Source: kmod
Binary: kmod libkmod2 libkmod-dev libkmod2-udeb
Architecture: source amd64
Version: 25-1
Distribution: unstable
Urgency: medium
Maintainer: Marco d'Itri <md@linux.it>
Changed-By: Marco d'Itri <md@linux.it>
Description:
 kmod       - tools for managing Linux kernel modules
 libkmod-dev - libkmod development files
 libkmod2   - libkmod shared library
 libkmod2-udeb - libkmod shared library (udeb)
Closes: 772628
Changes:
 kmod (25-1) unstable; urgency=medium
 .
   * New upstream release.
   * Enabled support for xz-compressed modules. (Closes: #772628)
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