ZFS lockup in "zfs" state

[Jeremy Chadwick]

On Wed, Feb 13, 2008 at 11:43:42AM +0100, Ivan Voras wrote:
> Hi,
> 
> A machine just wedged its ZFS file systems (UFS file systems were still
> running), all unresponsive processes were in "zfs" state. This is
> 7.0-RC1 on i386 with 2 GB RAM. It has happened at least once before.
> 
> I have a kernel core dump (dumped from kdb/ddb on hotkey), if anyone's
> interested.

Were you copying any data from a ZFS pool to a UFS filesystem, or
ZFS-to-ZFS, at that time?  Does your coredump's backtrace look at all
similar to the below report?

http://lists.freebsd.org/pipermail/freebsd-stable/2008-January/040047.html

-- 
| Jeremy Chadwick                                    jdc at parodius.com |
| Parodius Networking                           http://www.parodius.com/ |
| UNIX Systems Administrator                      Mountain View, CA, USA |
| Making life hard for others since 1977.                  PGP: 4BD6C0CB |