Re: [vbox-users] VBox doesn;t work with 'kvm' loaded
Amit, On Wednesday 04 February 2009, Amit k. Saha wrote: I have got the Linux 'kvm' module loaded. When I start VBox I get this message: VirtualBox can't operate in VMX root mode. Please disable the KVM kernel extension, recompile your kernel and reboot (VERR_VMX_IN_VMX_ROOT_MODE). [...] Is it because of the fact that when vboxdrv was compiled, the 'kvm' was not loaded? No. The problem is that the kvm modules change the operating mode of the host CPU (the so-called root mode), even if the modules are only loaded but not really used. VirtualBox cannot work in that mode. To use the root mode, this mode has to be initialized by VirtualBox itself, not by any other instance. Kind regards, Frank -- Dr.-Ing. Frank MehnertSun Microsystemshttp://www.sun.com/ signature.asc Description: This is a digitally signed message part. ___ vbox-users mailing list vbox-users@virtualbox.org http://vbox.innotek.de/mailman/listinfo/vbox-users
Re: [vbox-users] VBox doesn;t work with 'kvm' loaded
On Wed, Feb 4, 2009 at 3:23 PM, Frank Mehnert frank.mehn...@sun.com wrote: Amit, On Wednesday 04 February 2009, Amit k. Saha wrote: I have got the Linux 'kvm' module loaded. When I start VBox I get this message: VirtualBox can't operate in VMX root mode. Please disable the KVM kernel extension, recompile your kernel and reboot (VERR_VMX_IN_VMX_ROOT_MODE). [...] Is it because of the fact that when vboxdrv was compiled, the 'kvm' was not loaded? No. The problem is that the kvm modules change the operating mode of the host CPU (the so-called root mode), even if the modules are only loaded but not really used. VirtualBox cannot work in that mode. To use the root mode, this mode has to be initialized by VirtualBox itself, not by any other instance. Hmm..How to do that? Best regards, -Amit Kind regards, Frank -- Dr.-Ing. Frank MehnertSun Microsystemshttp://www.sun.com/ ___ vbox-users mailing list vbox-users@virtualbox.org http://vbox.innotek.de/mailman/listinfo/vbox-users -- Amit Kumar Saha http://amitksaha.blogspot.com http://amitsaha.in.googlepages.com/ *Bangalore Open Java Users Group*:http:www.bojug.in ___ vbox-users mailing list vbox-users@virtualbox.org http://vbox.innotek.de/mailman/listinfo/vbox-users
Re: [vbox-users] VBox doesn;t work with 'kvm' loaded
Hi Amit, Am Mittwoch, den 04.02.2009, 19:36 +0530 schrieb Amit k. Saha: On Wed, Feb 4, 2009 at 3:23 PM, Frank Mehnert frank.mehn...@sun.com wrote: Amit, On Wednesday 04 February 2009, Amit k. Saha wrote: I have got the Linux 'kvm' module loaded. When I start VBox I get this message: VirtualBox can't operate in VMX root mode. Please disable the KVM kernel extension, recompile your kernel and reboot (VERR_VMX_IN_VMX_ROOT_MODE). [...] Is it because of the fact that when vboxdrv was compiled, the 'kvm' was not loaded? No. The problem is that the kvm modules change the operating mode of the host CPU (the so-called root mode), even if the modules are only loaded but not really used. VirtualBox cannot work in that mode. To use the root mode, this mode has to be initialized by VirtualBox itself, not by any other instance. Hmm..How to do that? Best regards, -Amit This depends on the distribution you have but on most it is enough to do rmmod kvm-intel as root. Kind regards, Alexander Eichner ___ vbox-users mailing list vbox-users@virtualbox.org http://vbox.innotek.de/mailman/listinfo/vbox-users
Re: [vbox-users] VBox doesn;t work with 'kvm' loaded
On Wed, Feb 4, 2009 at 9:46 PM, Alexander Eichner alexander.eich...@sun.com wrote: Hi Amit, Am Mittwoch, den 04.02.2009, 19:36 +0530 schrieb Amit k. Saha: On Wed, Feb 4, 2009 at 3:23 PM, Frank Mehnert frank.mehn...@sun.com wrote: Amit, On Wednesday 04 February 2009, Amit k. Saha wrote: I have got the Linux 'kvm' module loaded. When I start VBox I get this message: VirtualBox can't operate in VMX root mode. Please disable the KVM kernel extension, recompile your kernel and reboot (VERR_VMX_IN_VMX_ROOT_MODE). [...] Is it because of the fact that when vboxdrv was compiled, the 'kvm' was not loaded? No. The problem is that the kvm modules change the operating mode of the host CPU (the so-called root mode), even if the modules are only loaded but not really used. VirtualBox cannot work in that mode. To use the root mode, this mode has to be initialized by VirtualBox itself, not by any other instance. Hmm..How to do that? Best regards, -Amit This depends on the distribution you have but on most it is enough to do rmmod kvm-intel as root. I have done that :-) and got it to work .. I was wondering if there was a way to tweak VirtualBox to use the root mode, as Frank earlier mentioned.. Thanks! -Amit Kind regards, Alexander Eichner ___ vbox-users mailing list vbox-users@virtualbox.org http://vbox.innotek.de/mailman/listinfo/vbox-users -- Amit Kumar Saha http://amitksaha.blogspot.com http://amitsaha.in.googlepages.com/ *Bangalore Open Java Users Group*:http:www.bojug.in ___ vbox-users mailing list vbox-users@virtualbox.org http://vbox.innotek.de/mailman/listinfo/vbox-users
Re: [vbox-users] VBox doesn;t work with 'kvm' loaded
Alexander Eichner wrote: Hi Amit, Am Mittwoch, den 04.02.2009, 19:36 +0530 schrieb Amit k. Saha: On Wed, Feb 4, 2009 at 3:23 PM, Frank Mehnert frank.mehn...@sun.com wrote: Amit, On Wednesday 04 February 2009, Amit k. Saha wrote: I have got the Linux 'kvm' module loaded. When I start VBox I get this message: VirtualBox can't operate in VMX root mode. Please disable the KVM kernel extension, recompile your kernel and reboot (VERR_VMX_IN_VMX_ROOT_MODE). [...] Is it because of the fact that when vboxdrv was compiled, the 'kvm' was not loaded? No. The problem is that the kvm modules change the operating mode of the host CPU (the so-called root mode), even if the modules are only loaded but not really used. VirtualBox cannot work in that mode. To use the root mode, this mode has to be initialized by VirtualBox itself, not by any other instance. Hmm..How to do that? Best regards, -Amit This depends on the distribution you have but on most it is enough to do rmmod kvm-intel as root. Is it possible to insmod kvm-intel after starting VirtualBox, so that you have both kvm and VirtualBox (without using cpu virtualisation extensions) virtual machines on the same host? Alternatively, is it possible to run VirtualBox within a kvm virtual machine? ___ vbox-users mailing list vbox-users@virtualbox.org http://vbox.innotek.de/mailman/listinfo/vbox-users
