Ring size inside guest Os is limited to 3,5 inspite of having 20 processors assigned

[Siddharth Moghe]

Steps to reproduce issue:

1. Post Ubuntu 14.04 install, install the required files for running virt-manager
2. Enable SRIOV on the machine
3. Via virt-manager, create VM on the machine
4. create 4 VFs from the physical function on the machine
4. Add 1 VF to the created Vm , 20 processors and 5gb memory
5. Boot guest OS
6. execute command ethtool -l <if>

Observations
+++++++++++
pre-set maximums
RX - 3
TX - 5
Current Hardware settings:
RX - 3
TX - 5

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: virt-manager 0.9.5-1ubuntu3
ProcVersionSignature: Ubuntu 3.19.0-30.34~14.04.1-generic 3.19.8-ckt6
Uname: Linux 3.19.0-30-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.15
Architecture: amd64
Date: Thu Oct 8 17:26:16 2015
InstallationDate: Installed on 2015-08-12 (57 days ago)
InstallationMedia: Ubuntu-Server 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_IN:en
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_IN
 SHELL=/bin/bash
SourcePackage: virt-manager
UpgradeStatus: No upgrade log present (probably fresh install)