mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2025-03-20 06:50:22 +03:00
4545f313c2
As of v9.8.0-rc1~7 we check whether two <memory/> devices don't overlap (since we allow setting where a <memory/> device should be mapped to). We do this pretty straightforward, by comparing start and end address of each <memory/> device combination. But since only the start address is given (an exposed in the XML), the end address is computed trivially as: start + mem->size * 1024 And for majority of memory device types this works. Except for NVDIMMs. For them the <memory/> device consists of two separate regions: 1) actual memory device, and 2) label. Label is where NVDIMM stores some additional information like namespaces partition and so on. But it's not mapped into the guest the same way as actual memory device. In fact, mem->size is a sum of both actual memory device and label sizes. And to make things a bit worse, both sizes are subject to alignment (either the alignsize value specified in XML, or system page size if not specified in XML). Therefore, to get the size of actual memory device we need to take mem->size and substract label size rounded up to alignment. If we don't do this we report there's an overlap between two NVDIMMs even when in reality there's none. Fixes: 3fd64fb0e236fc80ffa2cc977c0d471f11fc39bf Fixes: 91f9a9fb4fc0d34ed8d7a869de3d9f87687c3618 Resolves: https://issues.redhat.com/browse/RHEL-4452?focusedId=23805174#comment-23805174 Signed-off-by: Michal Privoznik <mprivozn@redhat.com> Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
.. image:: https://gitlab.com/libvirt/libvirt/badges/master/pipeline.svg
:target: https://gitlab.com/libvirt/libvirt/pipelines
:alt: GitLab CI Build Status
.. image:: https://bestpractices.coreinfrastructure.org/projects/355/badge
:target: https://bestpractices.coreinfrastructure.org/projects/355
:alt: CII Best Practices
.. image:: https://translate.fedoraproject.org/widgets/libvirt/-/libvirt/svg-badge.svg
:target: https://translate.fedoraproject.org/engage/libvirt/
:alt: Translation status
==============================
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:
https://libvirt.org
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:
https://libvirt.org/contact.html