Re: [PATCH 02/13] IB/core: allow passing mapping an offset into the SG in ib_map_mr_sg

Christoph Hellwig
2016-02-28T16:20:12Z

On Sun, Feb 28, 2016 at 04:57:59PM +0200, Sagi Grimberg wrote:
> This looks wrong...
>
> The SG offset should not be taken into account in the address
> translation vector that is given to the HW. The sg_offset needs to
> be accounted in the mr->iova:
>
> mr->iova = sg_dma_address(&sgl[0]) + sg_offset;
>
> I think the page mappings should stay as the are.

I think you're right. Do you have any good suggestion how to trigger
iSER first burst data, as apparently my normal testing didn't hit
this?