Linux 6.12 LTS support for zfs 2.3.0

[jjpe]

Describe the feature would like to see added to OpenZFS

Now that Linux 6.12 has officially been designated an LTS release, it would be nice if zfs 2.3.0 could add support for it before it's officially released.

How will this feature improve OpenZFS?

It will improve OpenZFS by supporting the latest LTS kernel release, which would have positive downstream effects.
And in any case, I believe that Linux 6.12 LTS will be supported eventually anyway, so why not add it to 2.3.0, as that is not yet stable?

Additional context

N/A

[amotin]

@jjpe 2.3.0-rc3/4 should already support 6.12. The only question seems to be: when 2.3.0 get released, but hopefully soon.

[LunarLambda]

See also the META file and the commit from Nov 21

2.3.0-rc3 (Nov 8) does not list support for 6.12. There is an accepted pull request for 2.3.0-rc4 which will support 6.12.

[k3d3]

Is it safe to run 2.3.0-rc3, or is it still considered experimental or beta?

[LunarLambda]

rc stands for "release candidate", it's neither experimental nor beta, but it may have bugs or other issues that need fixing before the proper 2.3.0 release. So basically a pre-release version for testing to see if the software is ready for the next release.

It should be fine to use but you may want to hold off on using the new features until 2.3.0 releases proper.

[k3d3]

Oh yeah, I know what RC means - I'm mainly asking because most project owners treat release candidates at fairly different readiness levels, especially the first RCs.

But good to know, thanks!

[devsk]

Is 6.12 support going to be added to zfs-2.2.x series? Or is it strictly 2.3.x only?

[LunarLambda]

As far as I know 2.3 does not have any backwards incompatible changes, so there's no reason to make a 2.2.x backport with 6.12 support

[robn]

Is 6.12 support going to be added to zfs-2.2.x series? Or is it strictly 2.3.x only?

@devsk 2.2.7 (currently being prepped in #16720) should have 6.12 support.

[AllKind]

I pulled and built the proposed patchset for 2.2.7 - https://github.com/tonyhutter/zfs/tree/zfs-2.2.7-hutter - and run it with kernel 6.12 without problems for some days now.

[tonyhutter]

zfs-2.2.7 was released today with 6.12 kernel support: https://github.com/openzfs/zfs/releases/tag/zfs-2.2.7

[behlendorf]

zfs-2.3.0-rc4 has also been released with 6.12 kernel support: https://github.com/openzfs/zfs/releases/tag/zfs-2.3.0-rc4