Re: [libvirt] How to config my VM to use KVM with libvirt?

Daniel P. Berrange wrote: ... Agreed. Below is a patch which should fix the oversight (lightly tested). However, this is going to be a user-visible change and may cause people to complain that their existing 32-bit domains are unexpectedly running with -no-kvm. Is that OK? Technically it's a misconfiguration. For the record, I think we've already broken this area once when 0.6.2 came out -- previous to that, even my 64-bit VMs had domain type "qemu", and libvirt ran my specified kvm binary without -no-kvm. -jim From: Jim Paris <jim(a)jtan.com&gt; Date: Tue, 21 Jul 2009 17:07:51 -0400 Subject: [PATCH] Always add -no-kvm and -no-kqemu, if available, for "qemu" domains. If the qemu binary supports "-no-kvm" and/or "-no-kqemu", they should always be added for plain "qemu" domains. Previously, we omitted them whenever the host and guest architectures implied that they would be disabled automatically, but that logic was flawed in some cases (such as i686 and x86_64). Signed-off-by: Jim Paris <jim(a)jtan.com&gt; --- src/qemu_conf.c | 12 ++++-------- 1 files changed, 4 insertions(+), 8 deletions(-) diff --git a/src/qemu_conf.c b/src/qemu_conf.c index 4043d70..f146598 100644 --- a/src/qemu_conf.c +++ b/src/qemu_conf.c @@ -977,22 +977,18 @@ int qemudBuildCommandLine(virConnectPtr conn, emulator = def->emulator; /* Need to explicitly disable KQEMU if - * 1. Arch matches host arch - * 2. Guest domain is 'qemu' - * 3. The qemu binary has the -no-kqemu flag + * 1. Guest domain is 'qemu' + * 2. The qemu binary has the -no-kqemu flag */ if ((qemuCmdFlags & QEMUD_CMD_FLAG_KQEMU) && - STREQ(ut.machine, def->os.arch) && def->virtType == VIR_DOMAIN_VIRT_QEMU) disableKQEMU = 1; /* Need to explicitly disable KVM if - * 1. Arch matches host arch - * 2. Guest domain is 'qemu' - * 3. The qemu binary has the -no-kvm flag + * 1. Guest domain is 'qemu' + * 2. The qemu binary has the -no-kvm flag */ if ((qemuCmdFlags & QEMUD_CMD_FLAG_KVM) && - STREQ(ut.machine, def->os.arch) && def->virtType == VIR_DOMAIN_VIRT_QEMU) disableKVM = 1; -- 1.6.1.3