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From: Pete French <petefrench@ingresso.co.uk>
Date: Thu, 24 May 2012 11:55:17 +0100
Cc: freebsd-stable@freebsd.org
Subject: Re: VirtualBox, AIO and zvol's - a cautionary tale
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> Can you please file a PR? Having broken AIO and ZFS would be .. bad.

OK: http://www.freebsd.org/cgi/query-pr.cgi?pr=168298

I thought it was most likely a bug in VirtualBox to be honest - broken
AIO and ZFS would be bad, but also highly noticeable in other
configurations, and this only seems to affect VBox.

cheers,

-pete.