Hi, guys I met a problem when hot-unplug vhost-user nic for Windows 2008 rc2 sp1 64 (Guest OS)
The xml of nic is as followed: <interface type='vhostuser'> <mac address='52:54:00:3b:83:aa'/> <source type='unix' path='/var/run/vhost-user/port1' mode='client'/> <target dev='port1'/> <model type='virtio'/> <driver queues='4'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/> </interface> Firstly, I use virsh attach-device win2008 vif.xml to hot-plug a nic for Guest OS. This operation returns success. After guest OS discover nic successfully, I use virsh detach-device win2008 vif.xml to hot-unplug it. This operation will fail with 100% reproduce rate. However, if I hot-plug and hot-unplug virtio-net nic , it will not fail. I have analysis the process of qmp_device_del , I found that qemu have inject interrupt to acpi to let it notice guest OS to remove nic. I guess there is something wrong in Windows when handle the interrupt.
