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Linux - Virtualization and Cloud This forum is for the discussion of all topics relating to Linux Virtualization and Linux Cloud platforms. Xen, KVM, OpenVZ, VirtualBox, VMware, Linux-VServer and all other Linux Virtualization platforms are welcome. OpenStack, CloudStack, ownCloud, Cloud Foundry, Eucalyptus, Nimbus, OpenNebula and all other Linux Cloud platforms are welcome. Note that questions relating solely to non-Linux OS's should be asked in the General forum.

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Old 10-19-2009, 03:44 AM   #1
Flymo
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Question Hardware virtualisation and Wiki misinformation - cautionary


Greetings!

Been playing with VBox for a while, got serious earlier this year with QEMU and KVM in Ubuntu 8.04.x LTS, mostly. When choosing a machine for KVM, the CPU virtualisation hooks are clearly critical, so we had a look for lists of CPUs with this information, and landed inevitably onto the usually excellent Wikipedia.

I'll need to repeat this research before posting any links, but there was a problem with (eg) lists of AMD CPUs being labelled as AMD-V compatible, but deeper investigation on the AMD site suggested the opposite.

Think there were a few Intel ones similarly mislabelled on Wikipedia, but cannot be sure. Need to check.

A majority of popular CPUs seem to lack virtualisation hardware, to date. Which is a pity since it does seem to have a (small) performance advantage.

So.... take care with cpu choice, folks. Will try to make this a bit more rigorous when time permits.

All the best, Ben
 
Old 10-19-2009, 04:34 AM   #2
MrCode
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Thought I might contribute to this thread a link:

Intel Processor Spec Finder

This allows you to narrow down which Intel processors support which features (such at VT-x hardware virtualization).

Last edited by MrCode; 10-19-2009 at 04:37 AM.
 
Old 10-19-2009, 04:49 AM   #3
dyasny
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once you install kvm, lsmod for kvm_intel or kvm_amd, if the module doesn't load, you have VT disabled or you don't have it. its the easiest way of checking

tw, if you enable VT in BIOS, make sure you do a full powercycle of the system, not just save changes and reboot.
 
  


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