Re: back/frontend drivers HelloWorld

[NAHieu <nahieu@gmail.com>]

On 9/22/05, Keir Fraser <Keir.Fraser@cl.cam.ac.uk> wrote:
>
> On 22 Sep 2005, at 14:46, Anton Korenyushkin wrote:
>
> >
> > I'm reading blkback/front driver's code, but it is too complicated.
> > I've
> > understood that i should use message rings for my task (i've read
> > docs/misc/blkif-drivers-explained.txt too). But how to get such ring?
> >
> > May be a simple example of solution such problem exists, so could you
> > point me
> > on this example?
>
> You bootstrap yourself via xenbus. You have a pre-agreed location in
> the xenstore hieararchy where the frontend driver writes key-value
> pairs containing the grant reference for the page containing the
> message rings, and an event channel for async notifications.
>

I imagine that we can get rid of event channel, and use xenstore to
notify. That is certainly OK, but I doubt about its efficientcy. What
do you think?

Thanks,
NAH