LinuxQuestions.org - [SOLVED] Load kvm module on boot in RHEL6 not working

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Load kvm module on boot in RHEL6 not working

Trying to load kvm module under RHEL6 from the following:

Code:



/etc/sysconfig/modules/kvm2.modules

Here is the code for kvm2.modules

Code:

#!/bin/sh 



if [ $(grep -c kvm /proc/cpuinfo) -ne 0 ]; then

    modprobe -v kvm >/dev/null 2>&1

fi

kvm module fails to load after a reboot. Also I'm basically copying what I see from other files in this directory. I'm not even sure what -ne 0 does, is that part o grep?

Quote:

Originally Posted by JockVSJock (Post 5394038)

Trying to load kvm module under RHEL6 from the following:

Code:



/etc/sysconfig/modules/kvm2.modules

Here is the code for kvm2.modules

Code:

#!/bin/sh 



if [ $(grep -c kvm /proc/cpuinfo) -ne 0 ]; then

    modprobe -v kvm >/dev/null 2>&1

fi

kvm module fails to load after a reboot. Also I'm basically copying what I see from other files in this directory. I'm not even sure what -ne 0 does, is that part o grep?

grep -c produces a count of matching lines. If that is not zero, grep found something.

Now, I don't know of a CPU flag named kvm, and your kvm2.modules file looks wrong. On my Centos 6.6, I have a kvm.modules file that looks like this:

Code:

#!/bin/sh

if [ $(grep -c vmx /proc/cpuinfo) -ne 0 ]; then

    modprobe -b kvm-intel >/dev/null 2>&1

fi

if [ $(grep -c svm /proc/cpuinfo) -ne 0 ]; then

    modprobe -b kvm-amd >/dev/null 2>&1

fi

modprobe -b vhost_net >/dev/null 2>&1

exit 0

That is, if the CPU has the vmx flag, it's an Intel CPU with virtualization extentions, therefore kvm-intel will be loaded. If it has the svm flag, it's an AMD CPU.

EDIT: Of course, the grep doesn't necessarily look for a CPU flag. However, that is obviously the intention in the correct kvm.modules.

I have a kvm file under /etc/sysconfig/modules, however its not loading the basic kvm module.

Code:



[root@ApacheFTP modules]# cat kvm.modules 

#!/bin/sh



if [ $(grep -c vmx /proc/cpuinfo) -ne 0 ]; then 

    modprobe -b kvm_intel >/dev/null 2>&1

fi



if [ $(grep -c svm /proc/cpuinfo) -ne 0 ]; then 

    modprobe -b kvm_amd >/dev/null 2>&1

fi



modprobe -b vhost_net >/dev/null 2>&1



exit 0

That is why I created a new .module file under this directory, to try and load this module.

Side note, I can't even load kvm_intel without error popping up as well.

Code:



[root@ApacheFTP modules]# lscpu

Architecture:          x86_64

CPU op-mode(s):        32-bit, 64-bit

Byte Order:            Little Endian

CPU(s):                2

On-line CPU(s) list:  0,1

Thread(s) per core:    1

Core(s) per socket:    2

Socket(s):            1

NUMA node(s):          1

Vendor ID:            GenuineIntel

CPU family:            6

Model:                58

Stepping:              9

CPU MHz:              2394.560

BogoMIPS:              4789.12

Hypervisor vendor:    KVM

Virtualization type:  full

L1d cache:            32K

L1i cache:            32K

L2 cache:              256K

L3 cache:              6144K

NUMA node0 CPU(s):    0,1

[root@ApacheFTP modules]# modprobe kvm_intel

FATAL: Error inserting kvm_intel (/lib/modules/2.6.32-431.el6.x86_64/kernel/arch/x86/kvm/kvm-intel.ko): Operation not supported

[root@ApacheFTP modules]#

Code:

Hypervisor vendor:    KVM

Virtualization type:  full

This probably means that your system is a virtual machine. The CPU is a virtual CPU and has no virtualization extensions. That's why kvm.modules doesn't load kvm-intel or kvm-amd, and that's also why you get an error trying to insert the kvm-intel module.

You can't run KVM on a CPU without virtualization extensions. It follows that you can't run KVM in a virtual machine.

I'll have to read up on this, however I will mark this thread as Solved.