Bug 1290150

Summary: Include example kvm.conf with nested options commented out
Product: Red Hat Enterprise Linux 7 Reporter: Karen Noel <knoel>
Component: qemu-kvm-rhevAssignee: Bandan Das <bdas>
Status: CLOSED ERRATA QA Contact: FuXiangChun <xfu>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 7.2CC: bdas, choma, hhuang, huding, juzhang, michen, mrezanin, pbonzini, virt-maint, xfu, zhguo
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: qemu-kvm-rhev-2.6.0-10.el7 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2016-11-07 21:45:40 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:

Description Karen Noel 2015-12-09 18:35:46 UTC
Feature:

(Description from Paolo)

> After the "modprobe nested=1" it would be useful to explain that it only
> enables nesting until next reboot.  Enable it forever requires adding
> something like
> 
> 	options kvm_intel nested=1
> 	options kvm_amd nested=1
> 
> to /etc/modprobe.d/kvm.conf (can use one file for both Intel and AMD).
> 
> We probably should distribute such a file (with the options commented
> out) as part of the qemu-kvm package

Benefit:

Customers trying nested KVM (tech preview) will have an example of how to enable nested permanently.

Comment 1 Miroslav Rezanina 2016-06-28 12:59:47 UTC
Fix included in qemu-kvm-rhev-2.6.0-10.el7

Comment 3 FuXiangChun 2016-09-01 08:21:14 UTC
Verified this bug with qemu-kvm-rhev-2.6.0-22.el7.x86_64

1.Enable nested via kvm.conf

# cat /etc/modprobe.d/kvm.conf 
# Setting modprobe kvm_intel/kvm_amd nested = 1
# only enables Nested Virtualization until the next reboot or
# module reload. Uncomment the option applicable
# to your system below to enable the feature permanently.
#
# User changes in this file are preserved across upgrades.
#
# For Intel
options kvm_intel nested=1
#
# For AMD
#options kvm_amd nested=1

2. reboot host

3. confirm nested if it is enabled

# cat /sys/module/kvm_intel/parameters/nested 
Y

For AMD machine.  It is the same result with Intel machine. 

So, Base on this testing result. This bug is fixed.

Comment 5 errata-xmlrpc 2016-11-07 21:45:40 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2016-2673.html