Public bug reported:
I've been running zfs 2.3.4 shipped with Questing running kernel 6.17
and keep getting kernel oops every few days. There's a warning by ZFS
that this kernel is not supported: "ZFS: Using ZFS with kernel
6.17.0-12-generic is EXPERIMENTAL and SERIOUS DATA LOSS may occur!"
Journal shows a kernel oops in ZFS arc_prune thread right before each
freeze.
1) Ubuntu 25.10 (Kubuntu - Questing Quokka), development branch
2) zfs-linux 2.3.4-1ubuntu2
3) I believe ZFS should work with the shipped kernel version.
4) System freeze needing reboot with kernel oops in arc_prune
journalctl -b -7 -k --grep="arc_prune|page fault|Oops"
Feb 06 16:19:54 Rio kernel: BUG: unable to handle page fault for address:
ffff8f0aac332740
Feb 06 16:19:54 Rio kernel: Oops: Oops: 0002 [#1] SMP NOPTI
Feb 06 16:19:54 Rio kernel: CPU: 5 UID: 0 PID: 1535 Comm: arc_prune Tainted: P
O 6.17.0-12-generic #12-Ubuntu PREEMPT(voluntary)
Feb 06 16:19:54 Rio kernel: arc_prune_task+0x22/0x40 [zfs]
Feb 06 16:19:54 Rio kernel: note: arc_prune[1535] exited with irqs disabled
Feb 06 16:19:54 Rio kernel: note: arc_prune[1535] exited with preempt_count 1
Fix:
ZFS 2.3.5 adds kernel 6.17 support:
https://github.com/openzfs/zfs/releases/tag/zfs-2.3.5
Manually updating resolved the symptoms.
** Affects: zfs-linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: crash packaging questing upgrade-software-version
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https://bugs.launchpad.net/bugs/2141207
Title:
zfs-linux 2.3.4 crashes on kernel 6.17 (Questing)
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