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[Xen-API] IPC on Domain0

To: xen-api@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-API] IPC on Domain0
From: Derek Riley <derek.riley@xxxxxxxxxxxxxxxxxxx>
Date: Fri, 31 Jul 2009 11:38:34 -0500
Delivery-date: Mon, 03 Aug 2009 08:24:13 -0700
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I am working on a project to modify Xen to precisely control the execution times of the individual guest domains, and I need some help.  I considered modifying the XM python program, but it is not precise or fast enough for my application. 

I want to be able to pass short, simple message quickly between an application-level process and the Xen kernel asynchonously.  I found an IPC mechanism designed for the method called netlink (http://www.linuxjournal.com/article/7356), but I am not sure how to incorporate it into the Xen kernel.  When I attempt to recompile the kernel with netlink, I get errors that seem to stem from type issues I am not familiar with. 

2 questions:
Is it possible to use a mechanism such as netlink with Xen?  If so, how?
Is there other functionality within Xen that could be used with minimal modification to do IPC within domain0? 

Any help/advice would be greatly appreciated.  Thanks!
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