[Merge] livecd-rootfs:xnox/mksquashfs-zstd into livecd-rootfs:ubuntu/master

[Dimitri John Ledkov]

On Thu, 24 Aug 2023, 04:02 Michael Hudson-Doyle, <
mp+449608 at code.launchpad.net> wrote:

> is it possible to quantify the size and speed changes for this?
>

I haven't uploaded this into a PPA and have not rebuilt the .iso nor
measured the difference.

One can edit squashfs out of band, by unsquashfs them / mksquashfs with
these options.

Speed changes - one needs to have reliable way to measure that, but for
example time to complete autoinstall should be a good ballpark.




> Support for this compression method has been in Ubuntu kernels for quite a
> while, right?


Something like v4.14 kernel, but userspace tooling landed like an lts
release later, and I think zstd build dep was not added immediately. But
like bionic or focal have everything.

Obviously these squashfses are going to be mounted by the mantic kernel
> "for real" but it would be a bit annoying if the jammy kernel could not
> mount them.
>

Mounting with kernel goes back longer than unsquashfs / fuse-squash.



-- 
>
> https://code.launchpad.net/~ubuntu-core-dev/livecd-rootfs/+git/livecd-rootfs/+merge/449608
> You proposed livecd-rootfs:xnox/mksquashfs-zstd for merging.
>
> Launchpad-Message-Rationale: Registrant
> Launchpad-Message-For: xnox
> Launchpad-Notification-Type: code-review
> Launchpad-Branch:
> ~ubuntu-core-dev/livecd-rootfs/+git/livecd-rootfs:xnox/mksquashfs-zstd
> Launchpad-Project: livecd-rootfs
>
>

https://code.launchpad.net/~ubuntu-core-dev/livecd-rootfs/+git/livecd-rootfs/+merge/449608
Your team Ubuntu Core Development Team is requested to review the proposed merge of livecd-rootfs:xnox/mksquashfs-zstd into livecd-rootfs:ubuntu/master.