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From: Hans Petter Selasky <hselasky@c2i.net>
To: freebsd-usb@freebsd.org,
 Simson Garfinkel <simsong@acm.org>
Date: Thu, 10 Jul 2008 22:03:34 +0200
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Cc: 
Subject: Re: usb/125450: Removing USB flash card while being accessed causes
	kernel panic
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On Thursday 10 July 2008, Simson Garfinkel wrote:
> The following reply was made to PR usb/125450; it has been noted by GNATS.
>
> From: Simson Garfinkel <simsong@acm.org>
> To: linimon@lonesome.com (Mark Linimon)
> Cc: bug-followup@FreeBSD.org
> Subject: Re: usb/125450: Removing USB flash card while being accessed
> causes kernel panic Date: Thu, 10 Jul 2008 12:19:00 -0700
>
>  I'm happy to get you a stack trace; it's easy to make this happen. How
>  do I get a stack trace from a kernel panic?
>
>  On Jul 10, 2008, at 11:29 AM, Mark Linimon wrote:
>  > we're going to need a stack trace, as well.
>  >
>  > mcl
>
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options USB_DEBUG

and

sysctl hw.usb.umass.debug=-1
sysctl hw.usb.debug=15

--HPS