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[Xen-devel] Re: [patch 00/21] Xen-paravirt: Xen guest implementation for paravirt_ops interface

Andrew Morton wrote:
> On Thu, 15 Feb 2007 18:24:49 -0800 Jeremy Fitzhardinge <jeremy@xxxxxxxx> 
> wrote:
>> This patch series implements the Linux Xen guest in terms of the
>> paravirt-ops interface.
> The whole patchset exports 67 symbols to modules.  How come?
> Are they all needed?

Yep, pretty much.  They're all generally to do with Xen's virtual device
model, and are needed by modular frontend/backed drivers.  This series
only includes the basic block and network frontend devices, but there
are more waiting in the wings.

The breakdown, roughly, is:

    * event channel management
    * pseudophysical <-> machine addresses
    * grant-table management
    * xenbus, which includes
          o which has a filesystem-like namespace
          o the means to monitor changes in objects in the namespace
          o shared resource management
          o suspend/resume


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