417197a38f
When Domain-0 autoballooning is enabled, it's possible that memory may need to be ballooned down in Domain-0 to accommodate the needs of another virtual machine. libxlDomainFreeMemory handles this task, but due to a logic bug is underflowing the variable containing Domain-0 new target memory. The resulting huge numbers are filtered by libxlSetMemoryTargetWrapper and memory is not changed. Under the covers, libxlDomainFreeMemory uses Xen's libxl_set_memory_target API, which includes a 'relative' parameter for specifying how to set the target. If true, the target is an increment/decrement value over the current memory, otherwise target is taken as an absolute value. libxlDomainFreeMemory sets 'relative' to true, but never allows for negative values by declaring the target memory variable as an unsigned. Fix by declaring the variable as signed, which also requried adjusting libxlSetMemoryTargetWrapper. Signed-off-by: Jim Fehlig <jfehlig@suse.com> Reviewed-by: Michal Privoznik <mprivozn@redhat.com> |
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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:
- libvirt-users@redhat.com (for user discussions)
- libvir-list@redhat.com (for development only)
Further details on contacting the project are available on the website: