Can someone say few words about kvm & virtualbox?

Post by **axet** » 4. Oct 2008, 20:36

Why they do not work together?

Post by **TerryE** » 5. Oct 2008, 01:31

They clash over the Ring 0 to Ring 1 co-opting. Both VMMs assume full access to the Host facilities.

Post by **sej7278** » 5. Oct 2008, 11:05

vm solutions obviously don't work well together however you should be able to have kvm and virtualbox or vmware installed together, you'd just have to kill off their kernel modules before switching from one to the other.

xen is different, as you have to have a special kernel for it (not just a module) nothing else will run or even install with it installed.

gewe · Post by **gewe** » 8. Oct 2008, 11:39

Vmware server and VirtualBox can work very well together, no need to do anything special. You can have VMware vm's and VirtualBox vm's running at the same time (as I have done frequently during migration from VMware to VirtualBox).

Post by **sandervl** » 8. Oct 2008, 14:46

KVM needs VT-x or AMD-V. VT-x can not coexist with software virtualization solutions on 64 bits hosts (with 32 bits guests).

The other part is that KVM takes ownership of VT-x and AMD-V once its kernel driver is active (you don't even need to use the product). That prevents other software from using VT-x or AMD-V.