Hi thanks for your reply
Since I am working on my master thesis and seriously I am running out of time I decided to downgrade my libvirt from 1.1.1 to 1.0.2 to be able to continue working on my thesis. Now it works ! But for your information , I already checked the XML file and the interface was really removed. I checked my host interfaces using ifconfig -a and I found however I released the device but it is not there and it is not possible to assign it to other VM so I though it means there is some missed procedure or some thing like this to unbind pci device ! as i mentioned if I restarted the libvirt service I was able to attach it again but still it was not shown in ifconfig -a list. The other point that i noticed was the number of "irq"s in my logs for MSI/MSI-X while attaching device. I am not a programmer and I have no clue about interrupts but the point was that in 1.1.1 i cloud see only 2 or 3 "irq" in my logs but now I see 7 or 8 . regards Mohsen On Fri, Mar 28, 2014 at 10:34 AM, Michal Privoznik <mpriv...@redhat.com>wrote: > 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 >
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