Description of problem:

Libvirt has capability of setting QoS over VM interfaces. It's implemented via HTB scheduler. However, this module is not part of main kernel package but kernel-modules-extra. Since libvirt is not dependent on that package we need to move the module into the main kernel package.

Version-Release number of selected component (if applicable):


How reproducible:
100%

Steps to Reproduce:
1. make sure kernel-modules-extra is not installed
2. define libvirt domain with QoS on an interface (see comment 1 in bug 835055)
3. virsh start $domain
4. observe failure

Alternative steps to reproduce:
1. make sure kernel-modules-extra is not installed
2. /sbin/tc qdisc add dev vnet0 root handle 1: htb default 1
   (substitute vnet0 with real NIC)
3. observe failure

  
Actual results:
Domain is not started.
Or for alternative steps: Queuing discipline cannot be created.

Expected results:
Domain can be started
Or for alternative steps: Queuing discipline is be created.

Additional info:

I don't think making libvirt dependent on kernel-modules-extra is the right path of fixing this. Because it's actually /sbin/tc which should be dependent if any. On the other hand, tc shouldn't be dependent on any QoS module. We shouldn't force users to install whole bunch of scheduling algorithms they won't even use.