🎉 OpenZFS 2.4 Extends Linux Kernel Support to 6.18 and Supports FreeBSD 14–16

｢ Administrators can now define quota policies that automatically apply to new datasets, reducing manual configuration and helping enforce consistent storage limits across systems. Allocation behavior has also been reworked through a new unified allocation throttling algorithm designed to reduce vdev fragmentation under heavy load ｣

https://linuxiac.com/openzfs-2-4-extends-linux-kernel-support-to-6-18-and-supports-freebsd-14-16/

#openzfs #freebsd #opensource

The recording of the December 17th, 2025 #OpenZFS Production User Call is up:

https://youtu.be/ucedjjzQ_b0

We discussed OpenZFS terminology for new developers, Zelta 'rebase', #FreeBSD bectl(8) zpool history improvements, User-Space OpneZFS news, a change in ashift=9 and 12 behavior on FreeBSD, and more!

"Don't forget to slam those Like and Subscribe buttons."

You can support all Call For Testing efforts via BSD Fund: https://bsdfund.org

The recording of the December 17th, 2025 #OpenZFS Production User Call is up:

https://youtu.be/ucedjjzQ_b0

We discussed OpenZFS terminology for new developers, Zelta 'rebase', #FreeBSD bectl(8) zpool history improvements, User-Space OpneZFS news, a change in ashift=9 and 12 behavior on FreeBSD, and more!

"Don't forget to slam those Like and Subscribe buttons."

You can support all Call For Testing efforts via BSD Fund: https://bsdfund.org

That said, I would like your financial help:

Cleaning up the #OpenZFS Wiki

Improving the OpenZFS Test Suite

Building a lightweight #FreeBSD storage and virtualization platform that is well-documented and has no strings attached

❤️

ZFS encrypted root on Ubuntu 25.10, installed from a fresh USB key works fine following the instructions at

https://openzfs.github.io/openzfs-docs/Getting%20Started/Ubuntu/Ubuntu%2022.04%20Root%20on%20ZFS.html

It's a shame they dropped native support from the installer. That was a lot of hoops to jump through.

One thing missing was needing to run

addgroup --system gnome-initial-setup

otherwise gdm3 wasn't coming up. I'm also not sure if swap is working properly, but that doesn't really matter for me.

#zfs #openzfs #ubuntu

ZFS encrypted root on Ubuntu 25.10, installed from a fresh USB key works fine following the instructions at

https://openzfs.github.io/openzfs-docs/Getting%20Started/Ubuntu/Ubuntu%2022.04%20Root%20on%20ZFS.html

It's a shame they dropped native support from the installer. That was a lot of hoops to jump through.

One thing missing was needing to run

addgroup --system gnome-initial-setup

otherwise gdm3 wasn't coming up. I'm also not sure if swap is working properly, but that doesn't really matter for me.

#zfs #openzfs #ubuntu

That said, I would like your financial help:

Cleaning up the #OpenZFS Wiki

Improving the OpenZFS Test Suite

Building a lightweight #FreeBSD storage and virtualization platform that is well-documented and has no strings attached

❤️

The videos for the first day of the 2025 OpenZFS User and Developer Summit:

https://youtube.com/playlist?list=PLaUVvul17xSeOGarlPaZcqzsVF23PSd6w

Thank you everyone who participated!

#OpenZFS

Linux 6.19-rc1 gives #OpenZFS the gift of a quiet December 🎄

https://github.com/openzfs/zfs/pull/18053

Linux 6.19-rc1 gives #OpenZFS the gift of a quiet December 🎄

https://github.com/openzfs/zfs/pull/18053

The recording of the December 10th, 2025 #OpenZFS Production User Call is up:

https://youtu.be/2Idudwvlo6o

We discussed the 2025 OpenZFS User and Developer Summit session recordings, libzfs, zpool upgrade behavior, APFS features, a User-Space OpenZFS proposal, the OpenZFS Test Suite, a European Summit, Zelta policy controllers, and more!

"Don't forget to slam those Like and Subscribe buttons."

You can support all Call For Testing efforts via BSD Fund: https://bsdfund.org

We are please to announce the 2.4.0-rc5 release of #OpenZFS! Thank you everyone who helped make this possible and please test it to help guarantee that 2.4 is a milestone release.

https://github.com/openzfs/zfs/releases/tag/zfs-2.4.0-rc5

#OpenZFS 2.4.0-rc5 today. Linux 6.18 support is no longer experimental, and there's some important bugfixes too, not least a crasher on FreeBSD that we'd missed that was quickly noticed once FreeBSD 15 shipped!

I heard a rumour that it might be the final form and soon as tagged as 2.4.0 proper. Any and all testing appreciated!

https://github.com/openzfs/zfs/releases/tag/zfs-2.4.0-rc5
https://github.com/openzfs/zfs/compare/zfs-2.4.0-rc4...zfs-2.4.0-rc5

The day two #OpenZFS User and Developer Summit videos in case BSD.network is not linking them correctly:

https://www.youtube.com/playlist?list=PLaUVvul17xSeOGarlPaZcqzsVF23PSd6w

Remember when #Linux removed a function and people were all "omg, #OpenZFS is dooomed" and I shrugged and said no, this is normal? (read my timeline if you don't, not that it's that interesting).

Anyway, most kernel changes are like that. Not all. This one is way more tricky. The tl;dr is that a header that we don't use directly but gets included from a bunch of others can emit a reference to a symbol we can't access, breaking the build for no good reason - we didn't even want it!

Still work-around-able, but pretty tricky.

https://github.com/openzfs/zfs/pull/18040

The recording of the December 10th, 2025 #OpenZFS Production User Call is up:

https://youtu.be/2Idudwvlo6o

We discussed the 2025 OpenZFS User and Developer Summit session recordings, libzfs, zpool upgrade behavior, APFS features, a User-Space OpenZFS proposal, the OpenZFS Test Suite, a European Summit, Zelta policy controllers, and more!

"Don't forget to slam those Like and Subscribe buttons."

You can support all Call For Testing efforts via BSD Fund: https://bsdfund.org

We are please to announce the 2.4.0-rc5 release of #OpenZFS! Thank you everyone who helped make this possible and please test it to help guarantee that 2.4 is a milestone release.

https://github.com/openzfs/zfs/releases/tag/zfs-2.4.0-rc5

#OpenZFS 2.4.0-rc5 today. Linux 6.18 support is no longer experimental, and there's some important bugfixes too, not least a crasher on FreeBSD that we'd missed that was quickly noticed once FreeBSD 15 shipped!

I heard a rumour that it might be the final form and soon as tagged as 2.4.0 proper. Any and all testing appreciated!

https://github.com/openzfs/zfs/releases/tag/zfs-2.4.0-rc5
https://github.com/openzfs/zfs/compare/zfs-2.4.0-rc4...zfs-2.4.0-rc5

This #GivingTuesday we invite you to support all Call For Testing activities via https://bsdfund.org

Weekly #FreeBSD build option regressing tests
The Weekly Jails/Zones Production User Call
The Weekly #OpenZFS Production User Call
The Weekly #bhyve Production User Call
bhyvecon
The OpenZFS User and Developer Summit
BSDCan Fundraising
#BSDTV A/V package fundraising
Way too many conference talks

❤️