[pve-devel] pve-qemu-kvm: patches cleanup for last git

Dietmar Maurer dietmar at proxmox.com
Mon Mar 12 08:22:53 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?
> 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.

- Dietmar

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