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Re: [Xen-devel] Re: [updated] Re: [PATCH] USB virtualisation (experiment

To: xen-devel@xxxxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-devel] Re: [updated] Re: [PATCH] USB virtualisation (experimental)
From: Mark Williamson <Mark.Williamson@xxxxxxxxxxxx>
Date: Fri, 14 Jan 2005 14:07:11 +0000
Cc: Nuutti Kotivuori <naked@xxxxxx>
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> Woo, nice! I have an external MP3 player that is an USB mass storage
> hard drive - if the drive happens to spin down when plugging the cable

Hmm, that's a nasty problem - I wonder what causes it.

> in, it manages to freeze the USB subsystem in the kernel. Now I can
> just put it in a separate virtual machine and reboot it :-)

If it's freezing the USB subsystem (and nothing else), it implies a problem 
with the USB core and / or with the host controller driver.  If it's the 
latter, you'd have to run the driver for your (hardware) host controller in 
the domain so that could be restarted too - the appropriate tool for that 
would be the existing PCI driver domains stuff.

What kind of host controller do you have?  (or if you don't know, do you have 
USB 2.0?).  Do all other USB devices freeze as well when you plug in the MP3 
player?  And do you get any interesting output from dmesg regarding the 
error?

Cheers,
Mark


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