Public bug reported: 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 ** Affects: initramfs-tools (Ubuntu) Importance: Undecided Assignee: Benjamin Drung (bdrung) Status: New ** Description changed: 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. + 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 ** Changed in: initramfs-tools (Ubuntu) Assignee: (unassigned) => Benjamin Drung (bdrung) -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to initramfs-tools in Ubuntu. https://bugs.launchpad.net/bugs/2028567 Title: Do not re-compress compressed kernel modules and firmware files Status in initramfs-tools package in Ubuntu: New 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/2028567/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
