Re: Using VMCI in the kernel

[Min Xu (Hsu) <mi...@vm...>]

On Fri, 05 Dec 2008 Cam Macdonell wrote :
> I can certainly see how a datagram model has some advantages.  But, I'm 
> trying to do caching and for this purpose using shared memory requires 
> less concurrent programming (threads, etc) and it reduces unnecessary 
> copying of the data.  I'm looking at VMs in the context of distributed 
> high-performance computing.  Our VMs are disposable sandboxes in this 
> use, so suspension and replay are not features we need.

I see. This use case does make sense to me. Thanks a lot for sharing it.
I wonder does the shared memory punch a hole in your sandboxes in that a
incorrect program in one VM can change the shared memory in a way to
crash other VMs? Perhaps the shared memory is readonly from the VMs?

If you are caching a readonly FS, maybe there is a better way?