Control: tags -1 + moreinfo
Hi,
On Tue, Aug 12, 2025 at 12:39:13AM +0300, Good Grief wrote:
> Package: linux-image-6.12.38+deb13-amd64
> Version: 6.12.38-1
>
> Module from the subject is absent in the debian trixie default kernel.
>
> It was presented in all debian distribution default kernels before.
>
> For example it was in debian bookworm and in more old debian distributions.
> (before dist-upgrade)
> $ grep -i CONFIG_MD_LINEAR /boot/config-6.1.0-37-amd64
> CONFIG_MD_LINEAR=m
>
> But it is absent in debian trixie default kernel (6.12.38+deb13-amd64):
> (after dist-upgrade)
> $ grep -i MD_LINEAR /boot/config-$(uname -r)
> # CONFIG_MD_LINEAR is not set
>
> Could you bring it back please?
>
> I realize that I can compile it, but I don't want to do it each time I
> need to upgrade the kernel version.
>
> I am trying to use Debian GNU/Linux 13, kernel 6.12.38+deb13-amd64 and
> libc6 2.41-12.
MD_LINEAR was marked as deprecated for a long time and then removed in
6.8-rc1 with 849d18e27be9 ("md: Remove deprecated CONFIG_MD_LINEAR")
and then later due to people with use cases needing it, reintroduce
(at least temporarily for a couple of releases) with 6.14-rc1 (and
backported to 6.13.3 and 6.12.14), with 127186cfb184 ("md: reintroduce
md-linear").
Cf. https://git.kernel.org/linus/127186cfb184eaccdfe948e6da66940cfa03efc5
Now, can you briefly describe the use case you have which cannot be
covered by switching to dm-linear?
https://www.kernel.org/doc/html/latest/admin-guide/device-mapper/linear.html
Thanks already,
Regards,
Salvatore