Re: kvm binary names
On Mon, Mar 30, 2009 at 05:12:30PM -0400, Bill Davidsen wrote: Daniel P. Berrange wrote: On Fri, Mar 20, 2009 at 10:57:50AM -0700, jd wrote: Hi What is the motivation for having different kvm binary names on various linux distributions.. ? -- kvm -- qemu-system-x86_84 -- qemu-kvm I can tell you the history from the Fedora POV at least... We already had 'qemu', 'qemu-system-x86_64', etc from the existing plain qemu emulator RPMs we distributed. The KVM makefile creates a binary call qemu-system-x86_64 but this clashes with the existing QEMU RPM, so we had to rename it somehow to allow parallel installation of KVM and QEMU RPMs. KVM already ships with a python script called 'kvm' and we didn't want to clash with that either, so we eventually settled on calling it 'qemu-kvm'. Other distros didn't worry about clash with the python script so called their binary just 'kvm' Don't stop there, why does Fedora have both qemu-ppc and qemu-system-ppc and so forth? There are many of these, arm and m68k for instance. On x86 I assume that they are both emulated, and they are not two names for the same executable or such, so what are they and how to choose which to use? Those are totally different things. qemu-$ARCH is a userspace emulator, while qemu-system-$ARCH is a full machine emulator. The userspace emulator lets you directly execute binaries from the other non-native arch. The machine emulator provides a complete virtual machine where you can rnu an entire OS. Daniel -- |: Red Hat, Engineering, London -o- http://people.redhat.com/berrange/ :| |: http://libvirt.org -o- http://virt-manager.org -o- http://ovirt.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :| -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: kvm binary names
Daniel P. Berrange wrote: On Fri, Mar 20, 2009 at 10:57:50AM -0700, jd wrote: Hi What is the motivation for having different kvm binary names on various linux distributions.. ? -- kvm -- qemu-system-x86_84 -- qemu-kvm I can tell you the history from the Fedora POV at least... We already had 'qemu', 'qemu-system-x86_64', etc from the existing plain qemu emulator RPMs we distributed. The KVM makefile creates a binary call qemu-system-x86_64 but this clashes with the existing QEMU RPM, so we had to rename it somehow to allow parallel installation of KVM and QEMU RPMs. KVM already ships with a python script called 'kvm' and we didn't want to clash with that either, so we eventually settled on calling it 'qemu-kvm'. Other distros didn't worry about clash with the python script so called their binary just 'kvm' Don't stop there, why does Fedora have both qemu-ppc and qemu-system-ppc and so forth? There are many of these, arm and m68k for instance. On x86 I assume that they are both emulated, and they are not two names for the same executable or such, so what are they and how to choose which to use? -- Bill Davidsen david...@tmr.com We have more to fear from the bungling of the incompetent than from the machinations of the wicked. - from Slashdot -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: kvm binary names
On Mon, Mar 30, 2009 at 6:12 PM, Bill Davidsen david...@tmr.com wrote: Daniel P. Berrange wrote: On Fri, Mar 20, 2009 at 10:57:50AM -0700, jd wrote: Hi What is the motivation for having different kvm binary names on various linux distributions.. ? -- kvm -- qemu-system-x86_84 -- qemu-kvm I can tell you the history from the Fedora POV at least... We already had 'qemu', 'qemu-system-x86_64', etc from the existing plain qemu emulator RPMs we distributed. The KVM makefile creates a binary call qemu-system-x86_64 but this clashes with the existing QEMU RPM, so we had to rename it somehow to allow parallel installation of KVM and QEMU RPMs. KVM already ships with a python script called 'kvm' and we didn't want to clash with that either, so we eventually settled on calling it 'qemu-kvm'. Other distros didn't worry about clash with the python script so called their binary just 'kvm' Don't stop there, why does Fedora have both qemu-ppc and qemu-system-ppc and so forth? There are many of these, arm and m68k for instance. On x86 I assume that they are both emulated, and they are not two names for the same executable or such, so what are they and how to choose which to use? one of them being the userspace linux emulator, and the other, the system emulator. -- Glauber Costa. Free as in Freedom http://glommer.net The less confident you are, the more serious you have to act. -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
