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[Xen-devel] Re: Licensing conflict with OpenAFS kernel module

To: Anthony Liguori <aliguori@xxxxxxxxxx>
Subject: [Xen-devel] Re: Licensing conflict with OpenAFS kernel module
From: Sidney Cammeresi <sac@xxxxxxxxxxxxxx>
Date: Wed, 26 Apr 2006 10:51:18 -0500
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On Wed, 26 Apr 2006 at 10.38.45 -0500, Anthony Liguori wrote:
> Sidney Cammeresi wrote:
> >On Wed, 26 Apr 2006 at 10.27.42 -0500, Anthony Liguori wrote:
> >>Sidney Cammeresi wrote:
> >>>I recently upgraded two Xen domU instances from to 2.6.16.
> >>>Because I am running the OpenAFS client on each of them, I took the
> >>>opportunity to upgrade that (from 1.4.0 to 1.4.1) which required building
> >>>a new kernel module.  (The AFS client is partly in userspace and partly
> >>>in the kernel.)
> >>>
> >>>Loading the new module failed:
> >>>
> >>>           openafs: Unknown symbol force_evtchn_callback
> >>>           openafs: Unknown symbol xen_features
> >>>      
> >>I think you should urge OpenAFS to relicense their module under the GPL.
> >
> >Well this is not their decision given that the code came from IBM in
> >the first place.
> >
> >I note, however, your ibm.com e-mail address.  Do you perhaps know the
> >channels in IBM to go through to discuss IBM relicensing their code under
> >the GPL?
> I'd suggest bringing this up within the OpenAFS community.  If they are 
> making direct use of Xen-specific functions, then they can potentially 
> find a work around.
> If we've made it so that a non-GPL symbol depends on one of our GPL'd 
> symbols, then that may be a problem on our part.  I don't know whether 
> this is an acceptable thing to do.  Sounds like an issue that needs to 
> be discussed on LKML.

These functions do not appear in the OpenAFS source code, so the latter
possibility seems more likely.  I made some cursory examinations of the
source trees, but not knowing a lot about either, I didn't find anything.
If there's something I can do to help (like sending over my compiled
kernel module), let me know.


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