[Qemu-devel] Re: A new direction for vmchannel?

[Gleb Natapov]

On Sat, Jan 24, 2009 at 11:52:06AM -0600, Anthony Liguori wrote:
>> For use cases where you are exposing metadata from the host to the guest
>> this would be a very convenient approach indeed. As asked elsewhere in this
>> thread, my main thought would be about how well it suits a application that
>> wants a generic stream based connection between host & guest ? 
>> Efficient integration into a poll(2) based event loop would be key to 
>> that.
>
> You mean for a very large number of files (determining which property  
> has changed?).
>
I think what Daniel means is that for file to have stream semantic it is
not enough to ignore offset on read/write, but poll also should behave
similar to how it behaves with char device fd. With regular files poll
will always report that fd is ready for I/O.

--
                        Gleb.