Hi there, I am trying to understand the versions of KVM. From what I've learned so far, there are versions for KVM 1. qemu-kvm executable version, obtained for example /usr/libexec/qemu-kvm |head -n 1 2. kvm kernel module version, obtained for example modinfo kvm >From http://sourceforge.net/projects/kvm/files/, we see * kvm-kmod: listed by linux kernel version such as 2.6.32.3. It only has kvm-kmod-2.6.32.3.tar.bz2 * qemu-kvm: listed by release version such as 0.12.1.2. It only has qemu-kvm-0.12.1.2.tar.gz * kvm: listed by snapshot version such as 88. It contains o qemu-kvm-devel-88.tar.gz o kvm-kmod-devel-88.tar.gz o kvm-88.tar.gz: this includes both qemu-kvm and kvm-kmod source + / is the same as qemu-kvm + kvm/kernel is the same as kvm-kmod My first question: Is there a one-to-one match between the qemu-kvm and kvm-kmod versions? It is straightforward for snapshot development sources, since qemu-kvm and kvm-kmod come together. But for stable releases, for a specific kernel version (thus given kvm-kmod version), should we choose a particular qemu-kvm release version? Second question about the virtio drivers: Do a given set of virtio drivers work only for a specific kvm (kmod and qemu) versions? The reason I asked this is that I found out the virtio SCSI block driver works for windows 2008 RC2 on RHEl5.4 hosts but not on Ubuntu 9.10 hosts whose versions are different. On RHEL 5.4, I have [root@node2 NewInstallation]# /usr/libexec/qemu-kvm |head -n 1 QEMU PC emulator version 0.9.1 (kvm-83-maint-snapshot-20090205), Copyright (c) 2003-2008 Fabrice Bellard [root@node2 NewInstallation]# modinfo kvm filename: /lib/modules/2.6.18-164.el5/weak-updates/kmod-kvm/kvm.ko license: GPL author: Qumranet version: kvm-83-105.el5 srcversion: 3660497FE5FD1C725B5F09F depends: vermagic: 2.6.18-160.el5 SMP mod_unload gcc-4.1 parm: oos_shadow:bool parm: force_kvmclock:bool On Ubuntu 9.10, I have oneadmin@node1:/srv/cloud/ImgRep/VrSTORM/Win08/NewInstallation$ kvm --version QEMU PC emulator version 0.11.0 (qemu-kvm-0.11.0), Copyright (c) 2003-2008 Fabrice Bellard oneadmin@node1:/srv/cloud/ImgRep/VrSTORM/Win08/NewInstallation$ modinfo kvm filename: /lib/modules/2.6.31-11-server/kernel/arch/x86/kvm/kvm.ko license: GPL author: Qumranet srcversion: 4BE986C17F9CAF23A6FD6D5 depends: vermagic: 2.6.31-11-server SMP mod_unload modversions parm: oos_shadow:bool My guess for Window2008 not working on ubuntu is that its kernel/kvm-kmod version is too new. I deeply appreciate your answering my two questions. Thanks a lot. -- Shi Jin, Ph.D. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
