Re: [Xen-users] ipc equivalent under xen

[Mark Williamson <mark.williamson@xxxxxxxxxxxx>]

> > 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.

Yep.  It'll also enable high performance filesystem sharing using an 
interdomain buffer cache and finally a filesystem level copy-on-write 
mechanism.

Basically, loads of nice stuff.  It'll also prevent global warming, acid rain 
and stop gerbils falling over :-)

Cheers,
Mark

> > >  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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