From owner-freebsd-xen@FreeBSD.ORG  Fri Sep 27 07:00:50 2013
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From: Shanker Balan <mail@shankerbalan.net>
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Subject: Latest current -CURRENT (rev 255904) panics with "device hyperv" on
 XenServer 6.2
Message-Id: <7943FB36-C6F4-4529-A805-2C467192231F@shankerbalan.net>
Date: Fri, 27 Sep 2013 11:46:11 +0530
To: "freebsd-xen@freebsd.org" <freebsd-xen@freebsd.org>
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Helo,

Now that XENHVM has been merged into the GENERIC kernel, I recompiled =
todays -CURRENT (rev 255904)
and hit the following panic. It seeems to be HyperV related.

GENERIC without "device hyperv" works properly. The hypervisor is =
XenServer 6.2.

# HyperV drivers
device          hyperv          # HyperV drivers=20

Panic screenshots with backtrace at http://imgur.com/cZsDsKE&VCkh4VS

Regards.
@shankerbalan=