[openib-general] [PATCH] fmr pool: remove unnecessary pointer dereference

[Michael S. Tsirkin]

Quoting r. Or Gerlitz <or.gerlitz at gmail.com>:
> Subject: Re: [openib-general] [PATCH] fmr pool: remove unnecessary pointer dereference
> 
> On 7/10/06, Roland Dreier <rdreier at cisco.com> wrote:
> > Yes, looks like a good idea since the underlying FMR API doesn't
> > change the IOVA.
> 
> So this means that a ULP can not map on the same time these two page sets:
>  <A,B> and <A,B,C> suggesting the verbs layer to have A being the IOVA
> at the HCA IOMMU (eg MPT/MTT in the mellanox case), and getting some
> A* to be used for the second map?
> 
> Such a mapping might be possible eg under zero copy (direct IO) test
> doing two reads on parallel.

Sorry, I don't understand what you are trying to do, or how its related
to the patch.

Example?

-- 
MST