Bug 799185

Summary: Can't start virtual machine when set NIC model to "virtio".
Product: [Fedora] Fedora Reporter: Arnold Wang <arnold.x.wang>
Component: qemuAssignee: Justin M. Forbes <jforbes>
Status: CLOSED DUPLICATE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 16CC: amit.shah, berrange, cfergeau, dwmw2, ehabkost, gcosta, itamar, jaswinder, jforbes, knoel, scottt.tw, virt-maint
Target Milestone: ---   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2012-03-06 19:16:48 EST Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Description Arnold Wang 2012-03-01 23:52:01 EST
Description of problem:
When I tried to start the Windows 7 guest machine when I set its NIC model to
"virtio", I receive the following error message:
qemu-system-x86_64: -netdev tap,fd=24,id=hostnet0,vhost=on,vhostfd=25:
vhost-net support is not compiled in
qemu-system-x86_64: -netdev tap,fd=24,id=hostnet0,vhost=on,vhostfd=25:
vhost-net requested but could not be initialized
qemu-system-x86_64: -netdev tap,fd=24,id=hostnet0,vhost=on,vhostfd=25: Device
'tap' could not be initialized
The relevant command generated by virtual machine manager 0.9.1 is 
-netdev tap,fd=24,id=hostnet0,vhost=on,vhostfd=25 -device
However, from what I googled, it appears to me vhost-net should be supported by
Fedora 17. In fact, even "lsmod" shows the following:
[awang@mars ~]$ lsmod | grep vhost
vhost_net              33675  0 
macvtap                18183  1 vhost_net
tun                    22768  4 vhost_net

Version-Release number of selected component (if applicable):
[awang@mars ~]$ rpm -qa kernel
[awang@mars rules.d]$ rpm -qa | grep qemu

How reproducible:
Create a guest machine, set the NIC model to "virtio" and start it.

Steps to Reproduce:

Actual results:
The guest machine won't run.

Expected results:
The guest machine starts.

Additional info:
The complete Windows 7 guest machine configuration is attached.
Comment 1 Arnold Wang 2012-03-06 19:16:48 EST

*** This bug has been marked as a duplicate of bug 799155 ***