Re: [Xen-devel] [PATCH 00 of 29 RFC] libxl: move device plug/unplug to a separate daemon

[Roger Pau Monnà <roger.pau@xxxxxxxxxxxxx>]

2012/2/2 Roger Pau Monne <roger.pau@xxxxxxxxxxxxx>:
> This is the first attempt to delegate hotplug device plug/unplug to a
> separate daemon. This will also allow to plug/unplug devices from a
> domain different than Dom0, usually called a "driver domain".
>
> This series contain a mix of bug fixes, mainly for device
> unplug/destroy synchronization, and a set of new functions that
> describe a new protocol to be used when delegating the plug/unplug of
> devices to a daemon, called xldeviced (xl-device-daemon).
>
> As a very important note, I would like to add that this has only been
> tested with PV DomUs, and that qdisk support is missing (xldeviced is
> not prepared to launch a qemu-dm to support qdisk devices). I will

I've added qdisk support to xldeviced, but I will wait a little before
posting an updated version of the series, to have some comments and
address initial issues before sending so much chunk. I will also try
to test this against HVM DomUs the next week.

> work on that, but I think there's already a lot of stuff on this that
> needs proper review.
>
> The series has the following order:
>
> Â* patches 1-15: set everything necessary to execute hotplug scripts
> Â from libxl directly.
>
> Â* patches 16-25: add necessary libxl functions to delegate hotplug
> Â addition to a different daemon
>
> Â* patches 26-29: introduce xldeviced and start using it by default.
>
> Patch 20 contains a good description of the interaction between xl and
> xldeviced, and the xenstore entries used to accomplish this task.

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