[pve-devel] Use of ZFS 2.3.x in PVE 8.4

[Krzysztof Hajdamowicz <krzysztof@hajdamowicz.info>]

Hello,

A few months ago, I decided to experiment with bcachefs on my PVE 8.x home
server.
So far, the experience has been positive, although it requires building the
latest kernel from Linus's source tree, which can be a bit on the edge.

With some external assistance, I've managed to build the latest kernel
versions as a pve-kernel package [1], using the vanilla Linus repository
(latest git tag) with the latest bcachefs patches, and OpenZFS sources
directly from the upstream repository.
This setup means that the compatibility with OpenZFS 2.2.7 dictates the
pace at which I can compile new kernels.
Proxmox uses ZFS 2.2.7 in its kernel, which necessitates backporting
patches from the 2.3 branch [2].

My question is: To simplify my kernel flavor, which is focused on bcachefs,
can I migrate to the ZFS 2.3 branch, or does PVE rely on 2.2.7, making 2.3
potentially problematic?

For reference:

1: https://github.com/KrzysztofHajdamowicz/pve-kernel
2: https://github.com/openzfs/zfs/pull/17229#issuecomment-2857379669

Sincerely,
-- 
Krzysztof Hajdamowicz
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