Add support for ubuntu-server live largemem SUBARCH images (64k kernel variant)

[Łukasz Zemczak]

[Impact]

Since a while, our linux kernel packages also build a 64k page-size kernel variant alongside the regular generic 4k ones for arm64. We had requests coming from various places on making it easier for people to get an ubuntu-server installation with this kernel variant. After many discussions, it has been decided that for now - for noble and jammy - we would ideally want a new image with this kernel as default. The naming has been decided to be 'largemem', for environments with large memory requirements.

[Test Case]

Once package accepted into proposed, build both an arm64+largemem ubuntu-server daily-live image and an arm64 (no largemem) ubuntu-server image and make sure the images build fine (and gets published on cdimage). Download the image and confirm that the kernel shipped (and offered) in the largemem image are the 64k variants (generic, hwe - if available).

[Regression Potential]

Not much regression potential, but these changes could break other image builds, resulting with build failures. Also, rather impossible, but the changes could also affect the kernels shipped with other server images.

[Launchpad Janitor (janitor)]

This bug was fixed in the package livecd-rootfs - 24.04.22

---------------
livecd-rootfs (24.04.22) noble; urgency=medium

  * Add a largemem subarch for ubuntu-server that ships a 64k kernel variant
    by default (LP: #2050209).

 -- Łukasz 'sil2100' Zemczak <email address hidden> Thu, 25 Jan 2024 11:01:28 +0100

[Andreas Hasenack (ahasenack)]

This is not needed in mantic?

[Steve Langasek (vorlon)]

We don't produce server images for non LTS releases post release.

[Steve Langasek (vorlon)]

Hello Łukasz, or anyone else affected,

Accepted livecd-rootfs into jammy-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/livecd-rootfs/2.765.38 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-jammy to verification-done-jammy. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-jammy. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

[Steve Langasek (vorlon)]

Successful -proposed builds at:

https://launchpad.net/~ubuntu-cdimage/+livefs/ubuntu/jammy/ubuntu-server-live/+build/572733
https://launchpad.net/~ubuntu-cdimage/+livefs/ubuntu/jammy/ubuntu-server-live/+build/572734

[Launchpad Janitor (janitor)]

This bug was fixed in the package livecd-rootfs - 2.765.38

---------------
livecd-rootfs (2.765.38) jammy; urgency=medium

  * Add a largemem subarch for ubuntu-server that ships a 64k kernel variant
    by default (LP: #2050209)

livecd-rootfs (2.765.37) jammy; urgency=medium

  * fix: Fix for calling unminimize if lxd-installer package
    not installed. (LP: #2049723)

livecd-rootfs (2.765.36) jammy; urgency=medium

  * Use correct /etc/ssh/sshd_config.d/ filename so cloud-init overrides
    via cloud-config works. (LP: #2049860)

 -- Łukasz 'sil2100' Zemczak <email address hidden> Thu, 25 Jan 2024 11:46:49 +0100

[Steve Langasek (vorlon)]

The verification of the Stable Release Update for livecd-rootfs has completed successfully and the package is now being released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.