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For host-passthrough CPU we don't honor the CPU features specified in the XML, but we allow outputting them via the UPDATE_CPU flag for dumpxml, this gives user a rough idea of what features the CPU might have. After restoring a managedsave'd domain, the features might end up in the live status XML (in /var/run) without the model. This XML cannot be parsed by the daemon after restart and the domain might disappear. This fix skips formatting the features for HOST_PASSTHROUGH when UPDATE_CPU is not specified, so the newly restored domains and newly created snapshots won't be affected. Note: this doesn't fix existing snapshots or already restored running domains. https://bugzilla.redhat.com/show_bug.cgi?id=1030793 https://bugzilla.redhat.com/show_bug.cgi?id=1151885
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>