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Re: [Xen-devel] [PATCH 3/4] usb: Introduce Xen pvUSB backend



On 2015-03-04 09:09, Juergen Gross wrote:
The main question whether it is worth to consider this alternative is
the performance aspect. Does anyone have an idea which USB devices would
typically be used via pvusb? I'd suspect memory sticks and USB disks
and perhaps webcams being the most performance relevant ones. Is an
additional copy operation of user data acceptable here?

Biggest use-cases I can think of for USB pass-through would be hardware 'security' devices (fingerprint readers, Yubikeys, SafeNet dongles), webcams, and some of the more exotic input devices. Webcams and input devices are probably the most significant performance-wise.

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