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Date: Sat, 28 May 2016 18:59:05 +0300
From: Konstantin Belousov <kib@freebsd.org>
To: Ryan Stone <rysto32@gmail.com>
Cc: FreeBSD Current <freebsd-current@freebsd.org>
Subject: Re: panic: DI already started in pmap_delayed_invl_started
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On Sat, May 28, 2016 at 11:29:28AM -0400, Ryan Stone wrote:
> I updated my system to r254461 on Thursday, and got this panic overnight.
> I have a full core and debug symbols if anybody wants me to look at
> something.
> 
> panic: DI already started

I suspect there is some typo in the revision number to which you updated.
Do you have r300863 in your sources ?  If not, ensure that you updated
up to that rev.

If r300863 still demonstrates the problem, I will ask for more specific
information.