Re: [Xen-users] Shared memory between DomU's

[××× ×××××××× <eli240188@xxxxxxxxx>]

Hi,

Thank you very much for the answer.

Unfortunately i haven't made much of a progress.

Can you Âplease recall from what Xen version libvchan shipped with?Â

Is there a standalone version for installing it in case it doesn't shipped with my Xen?

Im not really sure who should i use it on other VM's expect Dom0.

what are the right steps?

where should i create the grant page?Â

how does The Cross Domain Vm's would know about it?

Is there a guide that i can use?

As you all probably understood i am pretty new with Xen and with sharing memory in it.

I will much appriate any help.

Thanks,

Eli.

2015-03-30 12:05 GMT+03:00 Ian Campbell <ian.campbell@xxxxxxxxxx>:

On Sun, 2015-03-29 at 18:54 +0300, ××× ×××××××× wrote:
> Hello
>
> i want two distinct process both DomU's to be able the read or write
> in a share memory.
>
> Many post are talking about granting permissions or grant table.
>
> I'm sorry if my question is a bit stupid. Where would i start to be
> able the test those grant permission?
> Should i need to write an external program or should i modify some Xen
> source codes?
>
> I really have no idea about where to start.
> I'll sincerely appreciate any idea. Even one stating where to start.

libvchan (shipped with Xen for a couple of versions) is designed to make
it easier to setup a shared memory ring between two userspace processes.
Even if you don't need the byte-stream it supplies it serves as an
example of how one goes about doing this sort of thing.

You wont need to modify any Xen source code, but you will need to make
sure you have a kernel in each guest with the appropriate grant table
and event channel drivers enabled. IIRC libvchan relies on gntdev,
gntalloc and evtchn drivers.

Ian.

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxx
http://lists.xen.org/xen-users