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f987d17511
A common coding pattern for changing blkio parameters is 1. virDomainGetBlkioParameters 2. change one or more params 3. virDomainSetBlkioParameters For this to work, it must be possible to roundtrip through the methods without error. Unfortunately virDomainGetBlkioParameters will return "" for the deviceWeight parameter for guests by default, which virDomainSetBlkioParameters will then reject as invalid. This fixes the handling of "" to be a no-op, and also improves the error message to tell you what was invalid
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>