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Date:      Thu, 7 Aug 2008 15:05:34 -0700 (PDT)
From:      Maximillian Dornseif <md@hudora.de>
To:        freebsd-fs@freebsd.org
Subject:   Strange (?) hangs with ZFS/rsync.
Message-ID:  <18880785.post@talk.nabble.com>

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I have a ZFS based backup server which rsyncs from a dozen other machines.
There is only a single rsync active for any point in time and the system is
used for nothing else. It has an amd64 kernel and 4GB RAM. I tried to follow
the ZFS tuning guide.

For a few weeks the machine works well. Since monday it rsync always hangs
when fetching a big logfile from a remote machine. 

The two rsync processes are in state "zfs:&b" and "zfs:lo" and can't be
killed.
The other strange thing is that the system is reporting 3367M (!) wired
memory.

I have uploaded dmesg output and a some additional information at
http://static.23.nu/md/Pictures/freebsd+zfs+issue.txt

Any suggestions on how to debug this issue?

Regards

Maximillian Dornseif
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