From owner-freebsd-acpi@FreeBSD.ORG  Wed Mar 16 15:12:05 2011
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Date: Wed, 16 Mar 2011 17:12:00 +0200
From: Andriy Gapon <avg@freebsd.org>
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To: "Ilya A. Arhipov" <micro@heavennet.ru>, Jung-uk Kim <jkim@freebsd.org>,
	"Moore, Robert" <robert.moore@intel.com>
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Cc: freebsd-acpi@freebsd.org
Subject: Re: Panic after update kernel
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on 16/03/2011 16:18 Ilya A. Arhipov said the following:
> 2011/3/16 Andriy Gapon <avg@freebsd.org <mailto:avg@freebsd.org>>
> 
>     on 16/03/2011 10:52 Ilya A. Archipov said the following:
>     > and see:
>     > http://imm.io/4nzZ
>     >
>     > what information still needs to provide?
> 
>     'bt' command output please (a screenshot is fine).
> 
>     --
>     Andriy Gapon
> 
> 
> boot:
> http://imm.io/4nTZ
> bt:
> http://imm.io/4nTS <-first
> http://imm.io/4nUd <-last

So the panic is that we acquire a regular (non-spin) mutex in an interrupt context.
Not sure if this is a FreeBSD issue (implementation of ACPI semaphore) or some
ACPICA issue (e.g. doing something wrong in an interrupt handler).

Jung-uk, Robert, can you please take a look?
Thanks!
-- 
Andriy Gapon