[openib-general] RFC: detecting duplicate MAD requests

[Sean Hefty]

Michael S. Tsirkin wrote:
> Here's an alternative idea: instead of making huge changes all over, how about
> we delay passing the RMPP transaction up to the user until we have the ACK with
> the response window, and ask the user to give us back this ACK packet (or just
> the window?) when he sends the response?  Since we didn't support dual-sided
> tansfers this extends rather than breaks both the ABI and the API.

I thought about this as well, and I think there was a discussion about doing 
this.  The window size could be exchanged in the RMPP header if needed.  We're 
kind of left with the same issue of trying to determine if a received MAD will 
generate a response.

> The issue of duplicates can then be dealt with by Jack's patch,
> detecting duplicate requests which does not require additional state.
> 
> Sounds good?
> 

If an alternative for handling DS RMPP can be found, I'm fine with this.

- Sean