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From: Hans Petter Selasky <hselasky@freebsd.org>
To: "M. Warner Losh" <imp@bsdimp.com>
Date: Thu, 8 Jan 2009 18:38:54 +0100
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Cc: perforce@freebsd.org
Subject: Re: PERFORCE change 155755 for review
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On Thursday 08 January 2009, M. Warner Losh wrote:
> In message: <200901071327.n07DRFt5091936@repoman.freebsd.org>
>
>             Hans Petter Selasky <hselasky@freebsd.org> writes:
> : 	Fix a race causing the explore thread to
> : 	hang when tearing down USB transfers at
> : 	detach.
>
> Would this explain a hang with a wait channel of DMSG on kldunload of
> the drivers?
>
> Warner

Yes,

If "ps auxw| grep DRAIN" shows you something.

Try out -current next week if you don't have access to P4.

--HPS