From owner-freebsd-fs@FreeBSD.ORG  Sat Jun 28 03:03:37 2014
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From: Walter Heukels <walter@cloudvps.com>
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Subject: ZFS deadlock report
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Date: Sat, 28 Jun 2014 05:03:25 +0200
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Hello,

we are seeing occasional zfs hangs on our file servers.  The symptoms =
are these:

- no NFS response
- =91zpool status=92 works and shows no errors, but =91zfs list=92 hangs
- ls on the mounted filesystems hangs as well
- kernel version is FreeBSD 10.0-STABLE #0 r265916, GENERIC

According to https://wiki.freebsd.org/AvgZfsDeadlockDebug this looks =
like a possible deadlock.

Running processes: https://www.badexample.net/tmp/ps-aux.txt
procstat -kk -a output: https://www.badexample.net/tmp/procstat.txt

Kind regards,
Walter Heukels
CloudVPS