[libvirt] [PATCH v2 1/4] domain_conf: Introduce iothreads XML

[Stefan Hajnoczi]

On Tue, Aug 26, 2014 at 11:15 PM, John Ferlan <jferlan at redhat.com> wrote:
> +        The content of this optional element defines the number
> +        of IOThreads to be assigned to the domain for use by
> +        virtio-blk-pci target storage devices. There should be
> +        only 1 or 2 IOThreads per host CPU and 1 IOThread per
> +        supported device.

Fine for now but in the future devices may support multiple IOThreads assigned.

This is necessary for multiqueue block layer support, where a storage
controller can submit I/O from multiple host CPUs at the same time.

Stefan