Il 15/05/2012 23:00, Michael S. Tsirkin ha scritto: > On Tue, May 15, 2012 at 04:26:39PM +0100, Anthony PERARD wrote: >> In the context of PV-on-HVM under Xen, the emulated nics are supposed to be >> unplug before the guest drivers are initialized. This mean that there must be >> unplug without the consent of the guest. >> >> Without this patch, the guest end up with two nics with the same MAC, the >> emulated nic and the PV nic. >> >> Signed-off-by: Anthony PERARD <anthony.per...@citrix.com> > > OK, so on Xen there are special devices that can be safely removed > without telling the guest? Does there need to be regular hotplug for > these devices too? Or can it be always surprise removal?
On Xen the PV drivers can ask the firmware to surprise-remove the emulated NICs. Of course it has to do it early enough so that the guest doesn't crash. Paolo
