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When the libxl driver is initialized, it creates a virDomainDef object for dom0 and adds it to the list of domains. Total memory for dom0 was being set from the max_memkb field of libxl_dominfo struct retrieved from libxl, but this field can be set to LIBXL_MEMKB_DEFAULT (~0ULL) if dom0 maximum memory has not been explicitly set by the user. This patch adds some simple parsing of the Xen commandline, looking for a dom0_mem parameter that also specifies a 'max' value. If not specified, dom0 maximum memory is effectively all physical host memory. Signed-off-by: Jim Fehlig <jfehlig@suse.com>
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>