Re: [libvirt] Device attach / detach problem for passthrough/SR-IOV in libvirt

On 27.03.2014 13:53, Mohsen Ghaemi wrote: > Hi all > > I just encountered a problem in libvirt while was trying to attach and > detach a sr-iov vf to my VM > > > The version of my libvirt is 1.1.1-0ubuntu8.5 > > > I tried to attach the device using following xml > > > <interface type='hostdev' managed='yes'> > > <mac address='5c:01:fd:12:34:58'/> > > <source> > > <address type='pci' domain='0x0000' bus='0x04' slot='0x01' > function='0x1'/> > > </source> > > </interface> > > > When i attached device it worked properly and i managed to ping another > host. > > > virsh # attach-device t5 1.xml > > Device attached successfully > > > But when i detached it still i had network traffic in my VM but libvirt > (virsh) said that > > > virsh # detach-device t5 1.xml > > Device detached successfully > > > The next time i tried to attach it libvirt said that > > > virsh # attach-device t5 1.xml > > error: Failed to attach device from 1.xml > > error: Requested operation is not valid: PCI device 0000:04:01.1 is in > use by domain t5 > > > and when i continue this action after the 'domain' i receive some > strange characters which might come from the memory space (memory > content) like some addresses, links or some characters > > > I tried it with different VMs and different guest OSs that the same > happend. > > > The same action was done with another host running libvirt version > > > Installed: 1.0.2-0ubuntu11.13.04.5~cloud1 > > Candidate: 1.0.2-0ubuntu11.13.04.5~cloud1 > This is probably a bug in libvirt. There's been a rework of hostdev plugging and unplugging recently. Can you try the 1.2.3-rc1 and see if the problem is gone? Michal