[openib-general] RFC: detecting duplicate MAD requests

[Michael S. Tsirkin]

Quoting r. Sean Hefty <mshefty at ichips.intel.com>:
> Subject: Re: RFC: detecting duplicate MAD requests
> 
> 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.

Sounds good.

> We're kind of left with the same issue of trying to determine if a received
> MAD will generate a response.

How do you mean? We have IsDS=1 flag for dual-sided, don't we? Dual-sided
transfer always has a response, doesn't it?

-- 
MST