Re: [Xen-users] ipc equivalent under xen

["Matthieu" <matxen@xxxxxxxxx>]

On August 4, 4:40 pm Mark Williamson <mark.williamson@xxxxxxxxxxxx> wrote:
> >  the user level interdomain memory will be accessible throw a virual
> >  device or just by programming ?
>
> I'll be supporting it via XenFS, so the applications in different
> domains will just mmap the same file in a XenFS share and it'll Just
> Work(TM).
In deed, looks promising.
If i have well understood it's a filesystem which only reside in memory and
 memory block can be mmaped by different domains.


> >  If it is the first case i'm interested, otherwise i'll do programming
> >  with socket thus avoiding development from you.
>
> It'll be a while before you see XenFS in a release - writing a full
> filesystem is going to be a pretty time consuming task.  You should
> probably write to the sockets API if you have an immediate requirement
> to get this working. Later on you can convert to my shared memory /
> Xen-aware networking stuff if you need the performance.
>
> Cheers,
> Mark
>
> >  Regards
> >  Matthieu
> >
> >  On August 2, 3:46 pm Mark Williamson <mark.williamson@xxxxxxxxxxxx>
> > > >   wrote: is there a way (network exepted) to make a xenU and xen0
> > > >   communicate. I'm thinking at something like a ipc or a pipe
> > > >   without having to open a socket on one side and to listen to the
> > > >   socket on the other. Regards
> > >
> > >  There's the control message channel (soon to be replaced by
> > >  xenstore / xenbus) but these aren't meant for high bandwidth comms.
> > >
> > >  I'll be looking at user-level interdomain shared memory soon, if
> > >  that's any help to you.
> > >
> > >  Cheers,
> > >  Mark
> >
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