Re: kshmem & ACE

[Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>]

Wink Saville wrote:
>>
>> Most paravirtual devices use atomic operations (or even just raw memory
>> accesses and memory barriers), which don't need any special
>> infrastructure.  This effectively makes them message-passing protocols
>> rather than shared memory protocol.  I can't see offhand why sharing
>> data structures would bring a great improvement, but maybe I'm tied to
>> the old way of thinking.
>>
>
> One of the uses of kshmem/ACE will be an implementation of a message
> passing technique that I hope to be quite general. Since this appears to
> be a common technique then maybe there is nothing new in what I've done
> which may make it redundant or may be a real contribution if it is more
> general then current techniques.
>
> Where might I find the current implementations of the PV devices?
>

A good well-tuned example is the Xen paravirtualized drivers. See 
http://article.gmane.org/gmane.linux.kernel.virtualization/2659 for a 
driver, and 
http://article.gmane.org/gmane.linux.kernel.virtualization/2660 (ring.h) 
for the underlying machinery.


-- 
error compiling committee.c: too many arguments to function


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