[Bug 2028567] Re: Do not re-compress compressed kernel modules and firmware files

[Launchpad Bug Tracker]

This bug was fixed in the package initramfs-tools - 0.142ubuntu8

---------------
initramfs-tools (0.142ubuntu8) mantic; urgency=medium

  [ Benjamin Drung ]
  * mkinitramfs:
    - Do not store intermediate main cpio archive
    - Put compressed kernel modules and firmware files in an uncompressed cpio
      (LP: #2028567)
  * Add support for zstd-compressed firmware
  * test: Ignore remaining systemd-udevd processes on arm64 as well
  * Update lintian overrides to format for lintian 2.116.3

  [ Loïc Minier ]
  * hook-functions: add stusb160x kernel module for Tegra IGX (LP: #2027636)

 -- Benjamin Drung <bdrung at ubuntu.com>  Wed, 26 Jul 2023 14:05:19 +0200

** Changed in: initramfs-tools (Ubuntu)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/2028567

Title:
  Do not re-compress compressed kernel modules and firmware files

Status in initramfs-tools package in Ubuntu:
  Fix Released

Bug description:
  initramfs-tools decompresses kernel modules and firmware files before
  putting them into the initramfs. This has several drawbacks:

  * The compressed kernel modules and firmware files are probably compressed with a higher level. So recompressing them in the initramfs (default: zstd -1) will increase the size.
  * Decompressing and compressing these files during mkinitramfs will take time
  * The size of the decompressed initramfs will be bigger. That size is needed in memory during boot.

  So put compressed kernel modules and firmware files in an uncompressed
  cpio instead. To make this change have an impact the files need to be
  shipped compressed:

  * kernel modules: bug #2028568
  * firmware files: bug #1942260

  See https://lists.ubuntu.com/archives/ubuntu-
  devel/2023-July/042652.html and
  https://lists.ubuntu.com/archives/ubuntu-devel/2023-July/042707.html

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