Re: git: dae1713419a6 - main - zfs: merge openzfs/zfs@269b5dadc (master) into main

On Wed, Nov 17, 2021 at 10:24:11AM +0100, Marcin Wojtas wrote:
> Hi,
> 
> Thank you for the update.
> 
> śr., 17 lis 2021 o 10:09 Martin Matuska <mm@freebsd.org> napisał(a):
> >
> > The branch main has been updated by mm:
> >
> > URL: https://cgit.FreeBSD.org/src/commit/?id=dae1713419a669d4f6c7acddf81a21297c809741
> >
> > commit dae1713419a669d4f6c7acddf81a21297c809741
> > Merge: b6cbbcae40b4 269b5dadcfd1
> > Author:     Martin Matuska <mm@FreeBSD.org>
> > AuthorDate: 2021-11-17 08:35:14 +0000
> > Commit:     Martin Matuska <mm@FreeBSD.org>
> > CommitDate: 2021-11-17 08:39:40 +0000
> >
> >     zfs: merge openzfs/zfs@269b5dadc (master) into main
> >
> >     Notable upstream pull request merges:
> >       #12285 Introduce a tunable to exclude special class buffers from L2ARC
> >       #12689 Check l2cache vdevs pending list inside the vdev_inuse()
> >       #12735 Enable edonr in FreeBSD
> >       #12743 FreeBSD: fix world build after de198f2
> >       #12745 Restore dirty dnode detection logic
> >
> >     Obtained from:  OpenZFS
> >     OpenZFS commit: 269b5dadcfd1d5732cf763dddcd46009a332eae4
> >
> 
> I have one question to make sure about the guidelines for future. I've
> been using ZFS on my arm64 machine for a while (a HEAD snapshot from
> ~July + custom newer kernels for development) - after trying the
> vanilla kernel after Nov 10 OpenZFS update I could no longer access
> the root partition (even after returning back to the kernel that had
> previously worked).
> 
> I repeated the same thing with Nov 4 snapshot:
> - Install system with ZFS
> - Try kernel binary with updated OpenZFS - lose access to root partition.
> 
> Is such behavior expected? If yes, is it recommended for the ZFS case
> to use kernel and the world only from the same baseline?
> 
> Best regards,
> Marcin

I don't know if this is related, but I just updated from the 4th
November snapshot to this commit and my zfs on root box can't mount
root.

Annoyingly I haven't time to debug right now.

- Tom