I've also gotten bitten by this. Upgrading to Ubuntu 21.10 caused weird
filesystem issues to be present on my ZFS filesystem, with errors on the
command-line such as:
Cannot access 'foobar': No such file or directory
When running ls -l in some directory, I get question marks, like this:
-????????? ? ? ? ? ? enum_binary_params.hpp
-????????? ? ? ? ? ? enum.hpp
I tried to select the "revert" option in the Grub boot menu to go back to
Ubuntu 21.04, and that worked.
I then tried to install a fresh installation of Ubuntu 21.10 from a USB
stick, selecting the ZFS option with encryption, and I am getting these
errors again.
I only noticed now this note in the release notes:
> The version of the ZFS driver included in the 5.13.0-19 kernel
contains a bug 16 that can result in filesystem corruption. Users of ZFS
are advised to wait until the first Stable Release Update of the kernel
in 21.10 before upgrading.
I know that this comment is not that useful to Ubuntu developers, but
I'm posting it for the benefit of those searching for this issue in
their favourite search engine.
** Also affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1906476
Title:
PANIC at zfs_znode.c:335:zfs_znode_sa_init() // VERIFY(0 ==
sa_handle_get_from_db(zfsvfs->z_os, db, zp, SA_HDL_SHARED,
&zp->z_sa_hdl)) failed
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