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Date: Wed, 06 Jul 2011 14:11:08 -0700
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To: Jung-uk Kim <jkim@FreeBSD.org>, freebsd-current@freebsd.org
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Subject: Re: Time keeping Issues with the low-resolution TSC timecounter
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>> Hmm...  GPF seems to be related to unclean %rcx.  Can you please
>> try the attached patch?  Please note you have to rebuild kernel
>> from scratch because this is a header file change.  It may not fix
>> "hang", though.  Please let me know.
> It is just committed at r223796.
>
> JK
>

This issue is resolved for me. Thanks Jung-uk! It's a far nicer fix than 
clobbering out TSC-low :).

Matt