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From: John Baldwin <jhb@freebsd.org>
To: Mark Felder <feld@feld.me>
Date: Wed, 19 Sep 2012 08:09:36 -0400
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	(bigwig.baldwin.cx); Wed, 19 Sep 2012 08:25:09 -0400 (EDT)
Cc: freebsd-hackers@freebsd.org, Andriy Gapon <avg@freebsd.org>
Subject: Re: Please help me diagnose this crazy VMWare/FreeBSD 8.x crash
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On Thursday, September 13, 2012 12:14:49 pm Mark Felder wrote:
> On Thu, 13 Sep 2012 10:11:28 -0500, Andriy Gapon <avg@freebsd.org> wrote:
> 
> > Just curious - does VMWare provide a remote debugger support (gdb stub)?
> 
> I'm not aware of one. What I have been able to successfully do is break  
> into the debugger during the hang but the info I've posted so far has not  
> been relevant to anyone. I'm hoping someone on the core team will  
> eventually be able to follow my guide and figure out what went wrong.

So the last e-mail I sent before this week I asked if you could get a 
crashdump from DDB?  The "flswai" case you pointed to was a lock deadlock, and 
having a crashdump would be really helpful for figuring out which threads were 
deadlocked.

Barring a crashdump, capturing 'ps' output from DDB would be a good first step 
(you can sanitize process names if you need to).  However, a crashdump that 
you can use kgdb on will make debugging this significantly easier.

-- 
John Baldwin