Re: [Xen-devel] Any plan to support disk driver domain?

[Daniel De Graaf <dgdegra@xxxxxxxxxxxxx>]

On 04/04/2013 06:26 AM, G.R. wrote:
> Hi developers,
> I'm currently running a PVHVM freeNAS domU to serve storage (SATA
> controller passed-through) to all other domUs. However, some issues are
> observed in the network / NFS performance for the NAS domU.
> I noticed that there is a blkback driver in freebsd which is documented as
> capable to export disk to other domains, which looks very promising.
> However, the wiki says that disk driver domain is not supported (at least
> for now).
>
> I wonder if there is any plan to support such disk driver domain? It'll be
> a great feature for my use case.
>
> Thanks,
> Timothy
I have submitted a patch adding libxl support for block backend domains - the
latest version is:

http://lists.xen.org/archives/html/xen-devel/2013-03/msg01172.html

This has been tested with Linux in-kernel blkback; you just have to disable 
libxl's
own hotplug execution option and the default (Linux) hotplug scripts will 
connect
the device. I assume freebsd support can be done similarly, although perhaps it
requires a helper in the domU?

--
Daniel De Graaf
National Security Agency

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