From owner-freebsd-hackers@FreeBSD.ORG  Sat Nov  5 17:09:48 2011
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Date: Sat, 5 Nov 2011 13:09:40 -0400
From: Brandon Falk <falkman@gamozo.org>
To: Mark Johnston <markjdb@gmail.com>
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Cc: freebsd-hackers@freebsd.org
Subject: Re: cdparanoia stuck in cbwait
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On Sat, Nov 05, 2011 at 12:48:02PM -0400, Mark Johnston wrote:
> On Sat, Nov 05, 2011 at 12:42:12PM -0400, Brandon Falk wrote:
> > Hello,
> > 
> > I was got some read errors when I was reading from my disk, which is
> > fine. But then cdparanoia starting to no longer respond. Now it's
> > zombied and sitting in cbwait. `kill -9 <pid>` does not take it down, it
> > seems like it's stuck in the kernel (?). Is this an issue to look at
> > cdparanoia for, or to look in the kernel? Perhaps cdparanoia or the
> > kernel should have some sort of a timeout? Currently it looks like the
> > only fix is a full reboot.
> 
> I've seen this problem a couple of times on -BETA2 as well. I haven't
> had time to try and figure out what's causing it, but a camcontrol reset
> of the bus will "fix" the problem without a reboot IIRC.
> 
> -Mark

No luck on the reset. When I reset, it says it was reset successfully,
but cdparanoia still sits zombied, and nothing changes. If I do
`camcontrol stop`, camcontrol hangs and becomes a zombie too (until I
kill it's parent process)

-Brandon