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Date: Tue, 23 Oct 2012 19:38:16 -0400
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To: Andriy Gapon <avg@FreeBSD.org>
Subject: Re: The shutdown bug?
References: <5086CD71.7020006@intersonic.se>
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Cc: jb <jb.1234abcd@gmail.com>, freebsd-stable@FreeBSD.org
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Andriy Gapon wrote:
> on 23/10/2012 21:38 Per olof Ljungmark said the following:
>> On 2012-10-23 19:41, jb wrote:
>>> Per olof Ljungmark <peo <at> intersonic.se> writes:
>>>
>>>> ... 
>>>> Setting sysctl hw.usb.no_shutdown_wait=1 does NOT fix the problem as
>>>> described in
>>>> http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/167685
>>>> ...
>>> There is another one:
>>> http://www.freebsd.org/cgi/query-pr.cgi?pr=172952&cat=
>>> jb
>> Thanks, I'll add my experiences to that one.
> 
> I've just posted another followup to that PR.  If you could do some debugging
> that would be great.

Thank you for the followup, I will respond later when I am able. I will
have to build DDB into my kernel and see what I can find out about where
it's stuck.

I also intend to remove the SAS controllers and disable USB and various
things I can do to see if it stops being 100% reproducible on this
particular system.

I just patched in the following as a MFC and this also did not affect
this issue:
http://svnweb.freebsd.org/base/head/sys/geom/geom_disk.c?r1=240629&r2=241022&view=patch

That is 240822 and 241022 combined:
http://svnweb.freebsd.org/base/head/sys/geom/geom_disk.c?r1=240629&view=log