Re: [Xen-devel] USB Xen Summit status summary

[Mark Williamson <mark.williamson@xxxxxxxxxxxx>]

> Forgive my ignorance :  (I don't know much about USB)
> what does  IDC stand for  in the contetx of Xen USB?

Harry wrote a generic InterDomain Communication library (IDC); the existing 
USB code is a client of this.  Part of the debate has been whether both 
should be merged, or whether USB support without IDC should be merged and 
then IDC features considered for gradual inclusion later.

Cheers,
Mark


> is it some type of  connector " (
> (by gogoling I found many results , like: IDC connector,
> Internet Direct Connection and others)
>
> TIA
> M.
>
> On 2/1/06, Nivedita Singhvi <nsnix@xxxxxxxxxxx> wrote:
> > Since Harry Butterworth, who's been working on the USB
> > virtualization couldn't attend the Xen Summit, I sat in
> > for him and am providing this summary:
> >
> > Here were the options under consideration:
> >
> > 1. Xen includes current patch Harry had put out, which
> >     includes his IDC API.
> > 2. Harry puts out a simpler USB driver without his IDC
> >     API, written directly to the current Xen bus/store API,
> >     and reducing to only features deemed needed for Xen,
> >     see if that will be accepted into tree.
> > 3. Examine USBoverIP patches (currently in -mm tree)
> >     and see if those provide all the functionality we
> >     need.
> > 4. Throw away everything and have someone else rewrite
> >     from scratch.
> >
> > There was a brief discussion at the Client (Graphics,
> > USB...) session on USB. Ewan and several community folks
> > were present. Opinions expressed:
> >
> > - Harry's IDC code and current code will not make it
> >    into tree as is [consensus]
> > - IDC piece very unlikely to be accepted into Linux mainline,
> >    hence should not go into Xen tree
> > - API code is orthogonal to USB driver piece, should be
> >    a seperate patch/discussion [consensus]
> > - Best option is (2), rewrite code to leaner, simpler
> >    USB driver with minimal functionality, and get that into
> >    tree
> > - Noone in session had looked at USBoverIp patches
> > - There were some good ideas in the IDC API that needed
> >    to be discussed/incorporated in Xen
> >
> > Other input/questions received:
> > - Need to get USB community input
> > - What were the issues that were left? Are they resolved?
> >    If so, what's the current working state of the patch?
> > - Keir: rewrite to a simpler driver without the IDC API
> >    as the xenbus/store stuff is pretty baked into Xen now,
> >    might want to do some cleanups in this area.
> > - Ian: look at USBoverIP, tried it and it seems to
> >    work, but not sure if that's the right solution
> >
> > Current Issues/Design questions:
> > - Harry's code supports back/front module load/unload
> >    (useful during development, if nothing else).
> > - Harry's code is not written to Ewan's last common
> >    code pullout API
> > - What other code functionality can be dropped in order
> >    to make it smaller?
> >
> > [All misrepresentations and errors are mine, I'm operating
> >   from memory and on occasion what I heard over the crowd noise :)]
> >
> > Hope that initiates the necessary conversation on this...
> >
> > thanks,
> > Nivedita
> >
> >
> > _______________________________________________
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> > Xen-devel@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-devel
>
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-- 
Dave: Just a question. What use is a unicyle with no seat?  And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!

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