linux-kernel - Re: [patch 00/21] Xen-paravirt: Xen guest implementation for paravirt

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Date:	Thu, 15 Feb 2007 23:20:46 -0800
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Andi Kleen <ak@....de>, linux-kernel@...r.kernel.org,
	virtualization@...ts.osdl.org, xen-devel@...ts.xensource.com,
	Chris Wright <chrisw@...s-sol.org>,
	Zachary Amsden <zach@...are.com>
Subject: 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@...p.org> 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



    J
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