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Groups > linux.debian.kernel > #84842

Bug#1063162: please omit single initrd.img generation if dpkg trigger for all is pending

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Hi,

On Mon, 05 Feb 2024 17:49:06 +0300 Michael Tokarev <mjt@tls.msk.ru> wrote:
> Currently, when installing other packages together with a new kernel,
> initramfs image for the new kernel is generated two times: once it is
> kernel-activated from /etc/kernel/postinst.d/initramfs-tools, and next it is
> dpkg-trigger-activated by updating certain paths (eg installing or upgrading
> busybox, mdadm, etc, which triggers initramfs rebuilds).
> 
> This is especially annoying when building images for virtual machines
> (like debvm-create etc), - there, initramfs is especially slow (it is
> already very slow as it is, but makes several times slower when run
> in emulated environment).  The whole thing needs to be generated only
> once, dpkg trigger should be enough, but it is actually generated
> twice.
> 
> For that I suggest to check in /etc/kernel/postinst.d/initramfs-tools
> if dpkg trigger for it is pending already, and if yes, do not generate
> the whole thing but create just a stub, an empty /boot/initrd.img-$kver,
> to be updated later when dpkg trigger is fired.
> 
> That will save a lot of time in various situations, including regular
> user machines where initrd is often regenerated multiple times during
> upgrades.

a duplicate of this bug seems to have been filed as #1079509 but it comes with
a patch which was submitted as a merge request on salsa:

https://salsa.debian.org/kernel-team/initramfs-tools/-/merge_requests/137

More discussion can be found there.

Thanks!

cheers, josch

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Bug#1063162: please omit single initrd.img generation if dpkg trigger for all is pending Michael Tokarev <mjt@tls.msk.ru> - 2024-02-05 16:00 +0100
  Bug#1063162: please omit single initrd.img generation if dpkg trigger for all is pending Johannes Schauer Marin Rodrigues <josch@debian.org> - 2024-12-16 14:10 +0100

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