[Xen-devel] [PVUSB] usbbusname is changing after rebooting

[Sergey <tsv.devel@xxxxxxxxx>]

Hello, all!
Hello, Noboru!

Hotplug rule for PVUSB consists of
<usbbusname>:<domid>:<vusb number>:<port number>

I noticed that usbbusname sometimes changes from time to time after host 
rebooting.
For example, yesterday i had it as "6-1", today it is "2-1".

I saw the topic about usbbusname on replugging.
http://lists.xensource.com/archives/html/xen-devel/2009-04/msg00400.html
Replugging doesn't change the usbbusname, but what about host rebooting?

I suppose, usb bus number is assigned during booting and may vary each 
time.
To identify usb device correctly i have to see dmesg after rebooting. 
It's quite inconvinient, imho.
What do you think about another method of USB naming like 
VendorId:ProductId of usb devices to be grabbed by domU?
It seems that HVM guests use this method by means of the parameter 
'usbdevice'.
Thank you.

Sergey.


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