[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH V4 3/7] libxl: add pvusb API
George Dunlap writes ("Re: [Xen-devel] [PATCH V4 3/7] libxl: add pvusb API"): > Ian / Ian / Wei / Jim: Hi. > 3. Have the libxl layer accept both busid and bus:addr. Translate as > necessary and store in the libxl_device_usb struct. ... > The advantage of #3 internally is that the functions can do the > translation once (if necessary), and can then pass around the public > libxl_device_usb struct as-is without needing any extra parameters or > a separate libxl_device_usb_internal. The disadvantage, I think, is > that from an interface perspective, it's fairly pointless to have > both. busid doesn't really give you any better or more control than > the other, and it's not any more convenient for the user (in fact it's > less convenient because it's more difficult to find). Is the busid more stable in the face of plug/unplug ? This is the normal reason for a more path-like device specification. If so then we must support it, even if it's not the usual way an ordinary user would use it for a one-off. Otherwise you have to write something in your config files for the VMs on your VM host, which will break when someone plugs a keyboard into the `wrong' USB port. Ian. _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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