[Users] [libvirt] Host local_host running without virtualization hardware acceleration

[Yedidyah Bar David]

----- Original Message -----
> From: "Sandro Bonazzola" <sbonazzo at redhat.com>
> To: "Martin Kletzander" <mkletzan at redhat.com>
> Cc: libvir-list at redhat.com, "vdsm-devel" <vdsm-devel at fedorahosted.org>, "users" <users at ovirt.org>
> Sent: Tuesday, November 5, 2013 11:56:24 AM
> Subject: Re: [Users] [libvirt] Host local_host running without virtualization hardware acceleration
> 
> Il 05/11/2013 10:49, Martin Kletzander ha scritto:
> > On Tue, Nov 05, 2013 at 09:08:33AM +0100, Sandro Bonazzola wrote:
> >> Hi,
> >> I had to reinstall ovirt yesterday and now it seems that it doesn't work
> >> anymore.
> >> I'm running nightly on Fedora 18.
> >>  kernel-3.11.4-101.fc18.x86_64
> >>  sanlock-2.8-1.fc18.x86_64
> >>  libvirt-1.1.4-1.fc18.x86_64
> >>  qemu-1.5.1-1.fc18.x86_64
> >>  vdsm-4.13.0-93.gitea8c8f0.fc18.x86_64
> >>  ovirt-engine-3.4.0-0.2.master.20131104192919.git3b65870.fc18.noarch
> >>
> >> engine-setup with all-in-one detects hardware virtualization and allow me
> >> to configure the system.
> >> (it fails detecting engine health status due probably to recent changes in
> >> its URL, I'm already looking into it)
> >>
> >> Once added localhost to the engine, it has been moved to non operational
> >> mode saying
> >> I don't have virtualization hardware acceleration anymore.
> >>
> >> I've found that:
> >>
> >> # modinfo kvm
> >> filename:
> >> /lib/modules/3.11.4-101.fc18.x86_64/kernel/arch/x86/kvm/kvm.ko
> >> license:        GPL
> >> author:         Qumranet
> >> depends:
> >> intree:         Y
> >> vermagic:       3.11.4-101.fc18.x86_64 SMP mod_unload
> >> parm:           min_timer_period_us:uint
> >> parm:           ignore_msrs:bool
> >> parm:           tsc_tolerance_ppm:uint
> >> parm:           allow_unsafe_assigned_interrupts:Enable device assignment
> >> on platforms without interrupt remapping support. (bool)
> >>
> > 
> > This is good, but AFAIK this module is not what provides /dev/kvm.
> > Depending on the processor you're using, try checking 'kvm_intel' or
> > 'kvm_amd'.  Also make sure both are loaded.
> 
> I've found that, missing kvm_intel.
> 
> > 
> >> # /usr/bin/qemu-kvm
> >> Could not access KVM kernel module: No such file or directory
> >> failed to initialize KVM: No such file or directory
> >>
> >> looking at strace:
> >> open("/dev/kvm", O_RDWR|O_CLOEXEC)      = -1 ENOENT (No such file or
> >> directory)
> >>
> > 
> > What does ls -lZ /dev/kvm tell you?
> 
> it doesn't existed, now it's working again after modprobe kvm_intel
> 
> > 
> >> Any clue on what may be happened?
> >>
> > 
> > No idea, but I'm basing everything on the fact that it worked before
> > the re-install, am I right?
> 
> right. something was loading that module automatically before reinstall and
> now I needed to create a conf file for having it loaded.

Perhaps it was libvirtd, and in your new setup it's not started automatically
on boot?
-- 
Didi