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The virStateInitialize() call for starting up stateful drivers may require that the event loop is running already. This it is neccessary to start the event loop before this call. At the same time, network clients must not be processed until afte virStateInitialize has completed. The qemudListenUnix() and remoteListenTCP() methods must therefore not register file handle watches, merely open the network sockets & listen() on them. This means clients can connected and are queued, pending completion of initialization The qemudRunLoop() method is moved into a background thread that is started early to allow access to the event loop during driver initialization. The main process thread leader pretty much does nothing once the daemon is running, merely waits for the event loop thread to quit * daemon/libvirtd.c, daemon/libvirtd.h: Move event loop into a background thread * daemon/THREADING.txt: Rewrite docs to better reflect reality
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>