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From: Hans Petter Selasky <hselasky@c2i.net>
To: freebsd-current@freebsd.org,
 sbruno@freebsd.org
Date: Sat, 10 Jul 2010 00:16:29 +0200
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Subject: Re: QEMU/KVM Panic on USB Mount
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On Friday 09 July 2010 19:12:59 Sean Bruno wrote:
> In order to come up with the most convoluted problem possible, I present
> to you screen shots of a panic from a FreeBSD VM running in QEMU
> emulation under RedHat's KVM infrastructure.
> 
> I presented a perfectly functional USB partition from my host machine to
> the VM.  Then I attempted to mount the partition from FreeBSD and it
> generated the panics located here:
> 
> http://people.freebsd.org/~sbruno/usb_panic1.png
> http://people.freebsd.org/~sbruno/usb_panic2.png
> 
> This is 100% reproducible.  But not an emergency or anything.

It might be that there is a conflict that both the VM and the OS is accessing 
/ loading drivers on the same USB device. The panic seems not directly related 
to USB.

--HPS