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

From: "Sandro Bonazzola" <sbonazzo(a)redhat.com&gt; To: "Martin Kletzander" <mkletzan(a)redhat.com&gt; Cc: libvir-list(a)redhat.com, "vdsm-devel" <vdsm-devel(a)fedorahosted.org&gt;, "users" <users(a)ovirt.org&gt; 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.