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During a live migration the guest may receive a disk access I/O error. In this state the guest is unable to continue running on a remote host after migration as some state may be present in the kernel and not migrated. With this patch, the migration is canceled in such case so it can either continue on the source if the I/O issues are recovered or has to be destroyed anyways.
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>