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41c2aa729f
We are using memory-backing-file even when it's not needed, for example if user requests hugepages for memory backing, but does not specify any pagesize or memory node pinning. This causes migrations to fail when migrating from older libvirt that did not do this. So similarly to commit 7832fac84741d65e851dbdbfaf474785cbfdcf3c which does it for memory-backend-ram, this commit makes is more generic and backend-agnostic, so the backend is not used if there is no specific pagesize of hugepages requested, no nodeset the memory node should be bound to, no memory access change required, and so on. Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1266856 Signed-off-by: Martin Kletzander <mkletzan@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>