mjhjmtu

I'm using VirtualBox for some projects that I'm working on but also want to use KVM. I know that I can't use both at the same time, because of VirtualBox which refuses to start with an error like: VERR_VMX_IN_VMX_ROOT_MODE

Now I thought it would be easy to stop all KVM / libvirtd services and after that to unload the KVM modules like so:

$ sudo systemctl stop libvirtd
$ sudo modprobe -r kvm_intel
$ sudo modprobe -r kvm

But when I try to unload the KVM modules, modprobe tells me that these modules are still in use.

When I check systemctl for other running services with libvirt in its name, it also lists:

$ sudo systemctl list-unit-files| grep libvirt
libvirt-bin.service enabled 
libvirt-guests.service enabled 
libvirtd.service enabled

and

$ sudo systemctl list-unit-files| grep kvm 
qemu-kvm.service enabled

So I stopped them all, but even after that, something is using KVM.

I did a

$ sudo lsof | grep kvm 
qemu-syst 14745 libvirt-qemu mem REG 0,13 10646 anon_inode:kvm-vcpu (stat: No such file or directory)
qemu-syst 14745 libvirt-qemu 11u CHR 10,232 0t0 551 /dev/kvm
qemu-syst 14745 libvirt-qemu 12u a_inode 0,13 0 10646 kvm-vm
qemu-syst 14745 libvirt-qemu 18u a_inode 0,13 0 10646 kvm-vcpu
qemu-syst 14745 14753 libvirt-qemu mem REG 0,13 10646 anon_inode:kvm-vcpu (stat: No such file or directory)
qemu-syst 14745 14753 libvirt-qemu 11u CHR 10,232 0t0 551 /dev/kvm
qemu-syst 14745 14753 libvirt-qemu 12u a_inode 0,13 0 10646 kvm-vm
qemu-syst 14745 14753 libvirt-qemu 18u a_inode 0,13 0 10646 kvm-vcpu
CPUx200/ 14745 14761 libvirt-qemu mem REG 0,13 10646 anon_inode:kvm-vcpu (stat: No such file or directory)
CPUx200/ 14745 14761 libvirt-qemu 11u CHR 10,232 0t0 551 /dev/kvm
CPUx200/ 14745 14761 libvirt-qemu 12u a_inode 0,13 0 10646 kvm-vm
CPUx200/ 14745 14761 libvirt-qemu 18u a_inode 0,13 0 10646 kvm-vcpu
SPICEx20 14745 14763 libvirt-qemu mem REG 0,13 10646 anon_inode:kvm-vcpu (stat: No such file or directory)
SPICEx20 14745 14763 libvirt-qemu 11u CHR 10,232 0t0 551 /dev/kvm
SPICEx20 14745 14763 libvirt-qemu 12u a_inode 0,13 0 10646 kvm-vm
SPICEx20 14745 14763 libvirt-qemu 18u a_inode 0,13 0 10646 kvm-vcpu
kvm-pit/1 14762 root cwd DIR 253,0 4096 2 /
kvm-pit/1 14762 root rtd DIR 253,0 4096 2 /
kvm-pit/1 14762 root txt unknown /proc/14762/exe

and it seems that something is still running. Did I miss something that I have to stop in order to completely stop KVM?

I would like to put all relevant steps into a script so that I can easily start / stop KVM or VirtualBox...