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When a network is defined with "<pf dev='xyz'/>", libvirt will query sysfs to learn the list of all virtual functions (VF) associated with that Physical Function (PF) then populate the network's interface pool accordingly. This action was previously done only when the first guest actually requested an interface from the network. This patch changes it to populate the pool immediately when the network is started. This way any problems with the PF or its VFs will become apparent sooner. Note that we can't remove the old calls to networkCreateInterfacePool that happen whenever a guest requests an interface - doing so would be asking for failures on hosts that had libvirt upgraded with a network that had been started but not yet used. This resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1047818
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>