Hi,<div><br></div><div>I&#39;ve been using libvirt (versions 0.9.11.5, and recently upgraded to 0.10.2), and have been attaching an SR-IOV VF to my VM with the following device configuration:</div><div><div>&lt;hostdev mode=&#39;subsystem&#39; type=&#39;pci&#39; managed=&#39;yes&#39;&gt;</div>
<div>      &lt;source&gt;</div><div>        &lt;address domain=&#39;0x0000&#39; bus=&#39;0x07&#39; slot=&#39;0x10&#39; function=&#39;0x0&#39;/&gt;</div><div>      &lt;/source&gt;</div><div>      &lt;address type=&#39;pci&#39; domain=&#39;0x0000&#39; bus=&#39;0x00&#39; slot=&#39;0x05&#39; function=&#39;0x0&#39;/&gt;</div>
<div> &lt;/hostdev&gt;</div></div><div><br></div><div>I had no problems with bringing up the VM and using the VF with this configuration.</div><div><br></div><div>Recently I noticed that I would be able to assign a mac address to the SR-IOV VF if I used the interface configuration and changed over to using:</div>
<div><div>&lt;interface type=&#39;hostdev&#39;&gt;</div><div>      &lt;mac address=&#39;52:54:00:d3:23:4f&#39;/&gt;</div><div>      &lt;source&gt;</div><div>        &lt;address type=&#39;pci&#39; domain=&#39;0x0000&#39; bus=&#39;0x07&#39; slot=&#39;0x10&#39; function=&#39;0x0&#39;/&gt;</div>
<div>      &lt;/source&gt;</div><div>      &lt;model type=&#39;virtio&#39;/&gt;</div><div>      &lt;address type=&#39;pci&#39; domain=&#39;0x0000&#39; bus=&#39;0x00&#39; slot=&#39;0x03&#39; function=&#39;0x0&#39;/&gt;</div>
<div>    &lt;/interface&gt;</div></div><div><br></div><div>My VM fails to start up with this interface configuration. The error reported is:</div><div>error: Failed to start domain exp85-1</div><div>error: An error occurred, but the cause is unknown</div>
<div><br></div><div>When I look into /var/log/messages I see the following messages:</div><div><br></div><div><div>Oct 15 15:25:48 dcswitch85 libvirtd[17709]: 2012-10-15 22:25:48.145+0000: 17713: error : virFileReadAll:457 : Failed to open file &#39;/var/run/libvirt/qemu/p1p1_vf0&#39;: No such file or directory</div>
<div>Oct 15 15:25:48 dcswitch85 libvirtd[17709]: 2012-10-15 22:25:48.146+0000: 17713: error : qemuRemoveCgroup:740 : internal error Unable to find cgroup for exp85-1</div><div>Oct 15 15:25:48 dcswitch85 libvirtd[17709]: 2012-10-15 22:25:48.146+0000: 17713: warning : qemuProcessStop:4136 : Failed to remove cgroup for exp85-1</div>
</div><div><br></div><div>I was wondering if anyone else has faced this problem or has a solution to this.</div><div><br></div><div>I&#39;m using Fedora17, KVM, and an 82599EB Intel NIC.</div><div><br></div><div>Thanks much in advance.</div>
<div><br></div><div>With best regards</div><div>Radhika</div><div><br></div><div><br></div><div><br></div><div><br></div>