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The balloon device is automatically added to qemu guests if supported, but it may be useful to desactivate it. The simplest to not change the existing behaviour is to allow <memballoon type="none"/> as an extra option to desactivate it (it is automatically added if the memballoon construct is missing for the domain). The following simple patch just adds the extra option and does not change the default behaviour but avoid creating a balloon device if type="none" is used. * docs/schemas/domain.rng: add the extra type attribute value * src/conf/domain_conf.c src/conf/domain_conf.h: add the extra enum value * src/qemu/qemu_conf.c: if enum is NONE, don't activate the device, i.e. don't pass the args to qemu/kvm
LibVirt : simple API for virtualization
Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.
Daniel Veillard <veillard@redhat.com>