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Bug#1073979: Please consider enabling the dm-clone module (CONFIG_DM_CLONE)

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  Bug#1073979: Please consider enabling the dm-clone module (CONFIG_DM_CLONE) Rob Leslie <rob@mars.org> - 2024-06-21 00:40 +0200
    Bug#1073979: marked as done (Please consider enabling the  dm-clone module (CONFIG_DM_CLONE)) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2025-05-01 14:40 +0200
    Bug#1073979: Please consider enabling the dm-clone module (CONFIG_DM_CLONE) Salvatore Bonaccorso <carnil@debian.org> - 2025-05-04 23:40 +0200
      Bug#1073979: Please consider enabling the dm-clone module (CONFIG_DM_CLONE) Rob Leslie <rob@mars.org> - 2025-05-05 22:00 +0200
    Processed: Re: Please consider enabling the dm-clone module  (CONFIG_DM_CLONE) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2025-05-04 23:40 +0200
    Bug#1073979: marked as done (Please consider enabling the  dm-clone module (CONFIG_DM_CLONE)) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2025-05-09 22:50 +0200

#82777 — Bug#1073979: Please consider enabling the dm-clone module (CONFIG_DM_CLONE)

Package: src:linux
Version: 6.1.90-1
Severity: wishlist
File: /boot/config-6.1.0-21-amd64

Dear Maintainer,

The dm-clone module is not included in the default Debian kernel. This, like
dm-cache, is a useful module and it is unfortunate that a custom kernel must
be built to obtain it.

Please consider enabling this module (CONFIG_DM_CLONE=m) in future Debian
kernels.

Thank you.


-- Package-specific info:
** Version:
Linux version 6.1.0-21-amd64 (debian-kernel@lists.debian.org) (gcc-12 (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40) #1 SMP PREEMPT_DYNAMIC Debian 6.1.90-1 (2024-05-03)

** Not tainted


-- System Information:
Debian Release: 12.5
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 6.1.0-21-amd64 (SMP w/16 CPU threads; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages linux-image-6.1.0-21-amd64 depends on:
ii  initramfs-tools [linux-initramfs-tool]  0.142
ii  kmod                                    30+20221128-1
ii  linux-base                              4.9

Versions of packages linux-image-6.1.0-21-amd64 recommends:
ii  apparmor             3.0.8-3
ii  firmware-linux-free  20200122-1

Versions of packages linux-image-6.1.0-21-amd64 suggests:
pn  debian-kernel-handbook  <none>
ii  grub-efi-amd64          2.06-13+deb12u1
ii  linux-doc-6.1           6.1.90-1

Versions of packages linux-image-6.1.0-21-amd64 is related to:
pn  firmware-amd-graphics     <none>
pn  firmware-atheros          <none>
pn  firmware-bnx2             <none>
pn  firmware-bnx2x            <none>
pn  firmware-brcm80211        <none>
pn  firmware-cavium           <none>
pn  firmware-intel-sound      <none>
pn  firmware-intelwimax       <none>
pn  firmware-ipw2x00          <none>
pn  firmware-ivtv             <none>
pn  firmware-iwlwifi          <none>
pn  firmware-libertas         <none>
pn  firmware-linux-nonfree    <none>
pn  firmware-misc-nonfree     <none>
pn  firmware-myricom          <none>
pn  firmware-netxen           <none>
pn  firmware-qlogic           <none>
pn  firmware-realtek          <none>
pn  firmware-samsung          <none>
pn  firmware-siano            <none>
pn  firmware-ti-connectivity  <none>
pn  xen-hypervisor            <none>

-- no debconf information

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#87198 — Bug#1073979: marked as done (Please consider enabling the dm-clone module (CONFIG_DM_CLONE))

[Multipart message — attachments visible in raw view] — view raw

Your message dated Thu, 01 May 2025 14:35:42 +0200 (CEST)
with message-id <20250501123542.05F6ABE2DE0@eldamar.lan>
and subject line Closing this bug (BTS maintenance for src:linux bugs)
has caused the Debian Bug report #948782,
regarding Please consider enabling the dm-clone module (CONFIG_DM_CLONE)
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner@bugs.debian.org
immediately.)


-- 
948782: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=948782
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems

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#87361

Control: tags -1 + moreinfo

Hi Rob,

On Fri, May 02, 2025 at 10:42:41AM -0700, Rob Leslie wrote:
> reopen 948782
> severity 948782 wishlist

Thanks for following up on
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1073979#12

this misses some explanations. DM_CLONE is still marked experimental
(since the initial commit and never got removed) upstream, can you
elaborate why it is believed we should enable this despite in the
Debian provided kernel?

Regards,
Salvatore

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#87385

[Multipart message — attachments visible in raw view] — view raw

Hi Salvatore,

Thanks for the follow-up.

> On May 4, 2025, at 4:27 PM, Salvatore Bonaccorso <carnil@debian.org> wrote:
> 
> Thanks for following up on
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1073979#12
> 
> this misses some explanations. DM_CLONE is still marked experimental
> (since the initial commit and never got removed) upstream, can you
> elaborate why it is believed we should enable this despite in the
> Debian provided kernel?


DM_CLONE is useful to have available in certain circumstances. I have successfully used it more than once over the years to do live data migrations. It was a hassle to build custom kernels just for this, but in the end quite worth it. Having DM_CLONE available as a module in Debian by default would greatly simplify the lives of others finding themselves in similar situations. The fact that more than one bug was filed requesting it shows there is interest.

Although marked experimental, I have experienced no problems with it. I note that DM_CACHE is also marked experimental, yet already enabled in Debian despite this.

Thanks for your consideration.

-- 
Rob Leslie
rob@mars.org

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#87362 — Processed: Re: Please consider enabling the dm-clone module (CONFIG_DM_CLONE)

Processing control commands:

> tags -1 + moreinfo
Bug #1073979 [src:linux] Please consider enabling the dm-clone module (CONFIG_DM_CLONE)
Bug #948782 [src:linux] linux: Request for CONFIG_DM_CLONE=m on 5.4+
Added tag(s) moreinfo.
Added tag(s) moreinfo.

-- 
1073979: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1073979
948782: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=948782
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems

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#87495 — Bug#1073979: marked as done (Please consider enabling the dm-clone module (CONFIG_DM_CLONE))

[Multipart message — attachments visible in raw view] — view raw

Your message dated Fri, 09 May 2025 20:41:32 +0000
with message-id <E1uDUXE-009fTe-U9@fasolo.debian.org>
and subject line Bug#948782: fixed in linux 6.14.6-1~exp1
has caused the Debian Bug report #948782,
regarding Please consider enabling the dm-clone module (CONFIG_DM_CLONE)
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner@bugs.debian.org
immediately.)


-- 
948782: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=948782
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems

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