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Date:      Mon, 20 Jun 2016 15:30:57 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-bugs@FreeBSD.org
Subject:   [Bug 210409] zfs: panic during boot
Message-ID:  <bug-210409-8@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D210409

            Bug ID: 210409
           Summary: zfs: panic during boot
           Product: Base System
           Version: 11.0-CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs@FreeBSD.org
          Reporter: kp@freebsd.org

I=E2=80=99m running a root-on-ZFS system and reliably see this panic during=
 boot.
It=E2=80=99s a 4 disk raidz-1, no log or cache devices.

Hardware is an HP Microserver.

Likely culprit (through bisect) is r300881.
It=E2=80=99s now running r302028 with r300881 backed out, and booting fine.

The panic:
panic: solaris assert: refcount(count(&spa->spa_refcount) >=3D spa->spa_min=
ref ||
MUTEX_HELD(&spa_namespace_lock), file:
/usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa_misc.c, line: 8=
63

Unfortunately I can=E2=80=99t get a dump, but here=E2=80=99s a picture of t=
he backtrace:
https://people.freebsd.org/~kp/zfs_panic.jpg

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