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Computing a total downtime during a migration requires us to store a time stamp when guest CPUs get stopped. The value (and all other statistics) is then transferred to the destination to compute the downtime. Because the stopped time stamp is stored by a STOP event handler while the statistics which will be sent over to the destination are copied synchronously within qemuMigrationWaitForCompletion. Depending on the timing of STOP and MIGRATION events, we may end up copying (and transferring) statistics without the stopped time stamp set. Let's make sure we always use the correct time stamp. https://bugzilla.redhat.com/show_bug.cgi?id=1282744 Signed-off-by: Jiri Denemark <jdenemar@redhat.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>