(bionic-amd64)root@ottawa:/tmp# dpkg-query -W initramfs-tools liblz4-tool zstd initramfs-tools 0.130ubuntu3.13 liblz4-tool 0.0~r131-2ubuntu3.1 zstd 1.3.3+dfsg-2ubuntu1.2
(bionic-amd64)root@ottawa:/tmp# mkinitramfs -c zstd -o zstd-initrd.img 4.15.0-150-generic (bionic-amd64)root@ottawa:/tmp# mkinitramfs -c lz4 -o lz4-initrd.img 4.15.0-150-generic (bionic-amd64)root@ottawa:/tmp# unmkinitramfs ./zstd-initrd.img zstd-unpacked (bionic-amd64)root@ottawa:/tmp# unmkinitramfs ./lz4-initrd.img lz4-unpacked (bionic-amd64)root@ottawa:/tmp# ls zstd-unpacked/ bin conf etc init lib lib64 run sbin scripts (bionic-amd64)root@ottawa:/tmp# ls lz4-unpacked/ bin conf etc init lib lib64 run sbin scripts (bionic-amd64)root@ottawa:/tmp# file zstd-initrd.img zstd-initrd.img: Zstandard compressed data (v0.8+), Dictionary ID: None (bionic-amd64)root@ottawa:/tmp# file lz4-initrd.img lz4-initrd.img: LZ4 compressed data (v0.1-v0.9) All is good. ** Tags removed: verification-needed verification-needed-bionic ** Tags added: verification-done verification-done-bionic -- 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/1932542 Title: Add support for zstd Status in initramfs-tools package in Ubuntu: Fix Released Status in initramfs-tools source package in Bionic: Fix Committed Status in initramfs-tools source package in Focal: Fix Released Bug description: [Impact] * initramfs-tools in impish has changed default initrd compression to zstd. To allow compressing and uncompressing such initrds on Focal LTS release we should backport zstd support in the mkinitramfs & unmkinitramffs tooling. For example ubuntu-cdimage uses unmkinitramfs tool to unpack and inspect impish initrds on a focal host. * Cherrypicking the feature from 0.138 release, which is also present in Hirsute and Impish. [Test Plan] * Create initrd with zstd $ mkinitramfs -c zstd -o zstd-initrd.img * Uncompress it with $ unmkinitramfs ./zstd-initrd.img zstd-initrd- unpacked * For bionic also repeat the same with lz4. [Where problems could occur] * This adds support for zstd compressed initrd in both mkinitramfs and unmkinitramfs. However our GA kernels do not support zstd compressed initrds. And depends on zstd package is not added either. Meaning one still has to install zstd to gain the unpack support. Changing initramfs.conf to zstd may result in unbootable instance when used with GA kernel. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/1932542/+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
