[Bug 264453] ZFS: unsupported feature: com.delphix:head_errlog

From: <bugzilla-noreply_at_freebsd.org>
Date: Sat, 04 Jun 2022 23:09:50 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=264453

--- Comment #1 from John Kennedy <warlock@phouka.net> ---
Doesn't look like pmbr has changed in a while:

root@bsd14:~ # md5sum /.zfs/snapshot/*/boot/pmbr
1d4076392c0e82e125659c634e894f96  /.zfs/snapshot/2021-08-25-17:02:45/boot/pmbr
1d4076392c0e82e125659c634e894f96  /.zfs/snapshot/2022-04-18-12:33:06/boot/pmbr
1d4076392c0e82e125659c634e894f96  /.zfs/snapshot/2022-04-22-18:00:27/boot/pmbr
1d4076392c0e82e125659c634e894f96  /.zfs/snapshot/2022-05-10-05:52:38/boot/pmbr
1d4076392c0e82e125659c634e894f96  /.zfs/snapshot/2022-05-15-11:41:44/boot/pmbr
1d4076392c0e82e125659c634e894f96  /.zfs/snapshot/2022-06-01-20:32:25/boot/pmbr
1d4076392c0e82e125659c634e894f96  /.zfs/snapshot/2022-06-01-20:50:29/boot/pmbr
1d4076392c0e82e125659c634e894f96  /.zfs/snapshot/2022-06-03-21:22:04/boot/pmbr
1d4076392c0e82e125659c634e894f96  /.zfs/snapshot/2022-06-03-21:37:42/boot/pmbr
1d4076392c0e82e125659c634e894f96  /.zfs/snapshot/2022-06-04-08:17:50/boot/pmbr
1d4076392c0e82e125659c634e894f96  /.zfs/snapshot/2022-06-04-08:31:35/boot/pmbr

... but gptzfsboot has:

[root@bsd14 ~]# (cd /.zfs/snapshot; for SNAP in `ls -1`; do echo `md5sum
$SNAP/boot/gptzfsboot` `strings -a < $SNAP/boot/kernel/kernel | grep
'^....FreeBSD'`; done)
bbf918861d08f572a08de899b5b7e77d 2021-08-25-17:02:45/boot/gptzfsboot
@(#)FreeBSD 13.0-STABLE #61 stable/13-n246945-f6dbc0d7335f: Tue Aug 24 22:38:37
PDT 2021
f41e9c3125372b40127bdb4f17df2bd5 2022-04-18-12:33:06/boot/gptzfsboot
@(#)FreeBSD 13.1-STABLE #82 stable/13-n250513-d15267582d6e: Mon Apr 18 09:42:42
PDT 2022
ba242267bd52d0ab906b3570e099e9ec 2022-04-22-18:00:27/boot/gptzfsboot
@(#)FreeBSD 14.0-CURRENT #83 main-n255016-2f2a5ecdf8a0: Fri Apr 22 15:15:07 PDT
2022
ba242267bd52d0ab906b3570e099e9ec 2022-05-10-05:52:38/boot/gptzfsboot
@(#)FreeBSD 14.0-CURRENT #93 main-n255521-10f44229dcd9: Mon May 9 23:07:08 PDT
2022
7e8dc145a6de9d8df50e4ff401754def 2022-05-15-11:41:44/boot/gptzfsboot
@(#)FreeBSD 14.0-CURRENT #96 main-n255642-f210e4fbc54a: Sun May 15 10:31:40 PDT
2022
6f7b8cc5d2f6622ed380be55b7e77d21 2022-06-01-20:32:25/boot/gptzfsboot
@(#)FreeBSD 14.0-CURRENT #107 main-n255878-a3d974082549: Mon May 30 08:07:34
PDT 2022
6f7b8cc5d2f6622ed380be55b7e77d21 2022-06-01-20:50:29/boot/gptzfsboot
@(#)FreeBSD 14.0-CURRENT #108 main-n255930-592e876a4229: Wed Jun 1 18:51:17 PDT
2022
6f7b8cc5d2f6622ed380be55b7e77d21 2022-06-03-21:22:04/boot/gptzfsboot
@(#)FreeBSD 14.0-CURRENT #109 main-n255938-326a8d3e085d: Thu Jun 2 18:26:47 PDT
2022
7f47ae1d5ec106427cec7b4e1238bb42 2022-06-03-21:37:42/boot/gptzfsboot
@(#)FreeBSD 14.0-CURRENT #111 main-n255948-2573e6ced996: Fri Jun 3 18:58:15 PDT
2022
7f47ae1d5ec106427cec7b4e1238bb42 2022-06-04-08:17:50/boot/gptzfsboot
@(#)FreeBSD 14.0-CURRENT #111 main-n255948-2573e6ced996: Fri Jun 3 18:58:15 PDT
2022
7f47ae1d5ec106427cec7b4e1238bb42 2022-06-04-08:31:35/boot/gptzfsboot
@(#)FreeBSD 14.0-CURRENT #112 main-n255977-45b143d2ea5f: Sat Jun 4 08:07:45 PDT
2022

The 5/20 commit by Toomas Soome (9cd45772a44f268ccb3e20caf7f3f764f6b5e1a1;
which I picked up on 5/21 but I didn't notice the zpool change at the time) is
presumably the trigger, but that's just a 1-liner.  I typically on keep
snapshots around for a while on kernel version bumps and some recent ones to
fall back to, so have a blind spot between 5/15 and 5/30.

We already know that the 7f47* version doesn't work, but I also tested with the
6f7b* version and that didn't fix the issue.

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