On 05/20/2010 10:19 PM, Tyler Bletsch wrote:
I'm interested in moving some research prototypes from Xen to KVM, but
there are a few esoteric features I'd need to do this.
First is an efficient mechanism for direct VM-to-VM
sockets...something that bypasses the protocol stack and minimizes
overhead. Xen has XenSocket, XenLoop, and others. I found a few
mentions of this idea dating back to 2006*, mostly saying that a few
people have done something like this as a one-off, but nothing
official has been released. I haven't found anything like this more
recently, though. Has there been any progress on this front?
Ideally, I'd want a character device or a special program that acts as
a fast pipe to a different VM.
Second, what about inter-VM shared memory?
Inter-VM shared memory (contributed by Cam, copied) is in the process of
being merged. That includes a fast interguest interrupt mechanism
(using irqfd), so you could easily layer a fast interguest pipe on top
of that.
It's possible to do a dedicated guest-to-guest channel using virtio and
a dma engine, but I'm not aware of any efforts in that direction.
--
error compiling committee.c: too many arguments to function
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