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Date:      Wed, 26 Sep 2012 12:48:18 GMT
From:      Oliver Adler <bug_reporter@a999.de>
To:        freebsd-gnats-submit@FreeBSD.org
Subject:   kern/172092: zfs import panics kernel
Message-ID:  <201209261248.q8QCmIm8015133@red.freebsd.org>
Resent-Message-ID: <201209261250.q8QCoGw1067920@freefall.freebsd.org>

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>Number:         172092
>Category:       kern
>Synopsis:       zfs import panics kernel
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Sep 26 12:50:15 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator:     Oliver Adler
>Release:        9.0-RELEASE-p3
>Organization:
N/A
>Environment:
FreeBSD i5.a999.de 9.0-RELEASE-p3 FreeBSD 9.0-RELEASE-p3 #0: Tue Jun 12 02:52:29 UTC 2012     root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC  amd64
>Description:
Using a 2.5" external USB 3.0 disk with 750 GB. On the disk is a bootable 9.0 FBSD. The disk was used as boot disk on a i386 atom system. Then using it on a amd64 system with
  zpool import -o altroot=/mnt -f zroot
orked fine. After shutting down the system with 
  shutdown -p
now the disk can no more be used.

Issuing 
  zpool list
or 
  zpool import -o altroot=/mnt -f zroot
on the amd64 system panics the kernel. Also attaching the device to the i386 system panics the atom system.

The failed assertion is in the file 
  ddt.c line 129.

I have a picture of the panic.

My assumption is, that there is a problem with deduplication (because on the disk is one dataset with switched on dedup).

The data of the disk is no more accessible.
>How-To-Repeat:
Using this disk, plugging it to either the amd64 or the i386 system
Issuing 
  zpool list 
and the panic shows up

If you have any patches to test I will do this. I will keep the disk in this state for some time. If I can help in any way, please ask me.
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted:



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