[pve-devel] pve-qemu-kvm: patches cleanup for last git
aderumier at odiso.com
Mon Mar 12 08:59:13 CET 2012
> And we I try to live migrate, why tablet on ehci, Migratation start on other node
> but crash with kvm error message "can not migrate unmigrate device ...."
>>You can't migrate a VM which uses usb devices from the host.
>>Note: because of that, we only use ehci if you add a usb device from the host.
> I see in qemu doc (usb2.txt) that tablet is always on uhci.
> Maybe because it's a virtual device and migration is not planned to work on ehci
> maybe can we always put tablet on uhci ?
>>Why does that make sense?
Because live migration works with tablet on uhci. (related to my point 2 with hotplug)
> 2) I'm working on usb hotplug, it's working fine for devices but I can't hotplug
> ehci controller (very instable in windows/linux).
> So I need to have usb controller present at vm start.
> What is the reason to have it activated only when usb devices exist in config at
> start ? (stabibility ?)
>>Because ehci does not support live migration.
Oh, ok, I thinked it doesn't work only if physical usb device was attached to it, but not if the controller was alone.
>>If you configure a usbhost device with BUS-PORT you can hot-plug that device (physically).
>>So do we really need hotplug of the ehci controller (why)?
I was thinking about hot-pluging a usb device,after vm started without usb configuration.
I have a host with a lot vm (40vm by exemple), it's impossible to map 1 bus-port to each vm.
And I want, time to time, plug a usb drive to some vm by exemple, to copy some data on it.
How Can I do it for the moment ?
Alexandre D erumier
Fixe : 03 20 68 88 90
Fax : 03 20 68 90 81
45 Bvd du Général Leclerc 59100 Roubaix - France
12 rue Marivaux 75002 Paris - France
More information about the pve-devel