3f01ecd830
I've seen examples in the wild of the cluster attribute having non-zero value on x86_64. This is obviously quite confusing, but it's the information that Linux exposes to userspace and we don't really have a way to tell apart a valid die/cluster ID from a dummy one. What ultimately matters is that the underlying assumptions about topology are respected, which they are: in the x86_64 cases that I have analyzed, for example, each "cluster" contained exactly one core, so any program that would use this information to influence guest topology decisions would be unaffected by the additional level showing up in the hierarchy. In an attempt to reduce confusion, remove any reference to any specific value for the attributes having any special meaning attached to it. In fact, since there are plans to make it possible to create guests with multiple CPU clusters on x86_64, rework the note into a more generic warning cautioning users that an attribute showing up here does not imply that the same attribute can be used when defining a guest CPU topology. Signed-off-by: Andrea Bolognani <abologna@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Libvirt API for virtualization
Libvirt provides a portable, long term stable C API for managing the virtualization technologies provided by many operating systems. It includes support for QEMU, KVM, Xen, LXC, bhyve, Virtuozzo, VMware vCenter and ESX, VMware Desktop, Hyper-V, VirtualBox and the POWER Hypervisor.
For some of these hypervisors, it provides a stateful management daemon which runs on the virtualization host allowing access to the API both by non-privileged local users and remote users.
Layered packages provide bindings of the libvirt C API into other languages including Python, Perl, PHP, Go, Java, OCaml, as well as mappings into object systems such as GObject, CIM and SNMP.
Further information about the libvirt project can be found on the website:
License
The libvirt C API is distributed under the terms of GNU Lesser General Public License, version 2.1 (or later). Some parts of the code that are not part of the C library may have the more restrictive GNU General Public License, version 2.0 (or later). See the files COPYING.LESSER and COPYING for full license terms & conditions.
Installation
Instructions on building and installing libvirt can be found on the website:
https://libvirt.org/compiling.html
Contributing
The libvirt project welcomes contributions in many ways. For most components the best way to contribute is to send patches to the primary development mailing list. Further guidance on this can be found on the website:
https://libvirt.org/contribute.html
Contact
The libvirt project has two primary mailing lists:
- users@lists.libvirt.org (for user discussions)
- devel@lists.libvirt.org (for development only)
Further details on contacting the project are available on the website: