Re: [dpdk-dev] [PATCH] librte_eal: add APIs to speedup virt2iova/phys

[Feng Li <lifeng1519@gmail.com>]

On Thu, Apr 1, 2021 at 6:39 PM Burakov, Anatoly
<anatoly.burakov@intel.com> wrote:
>
> On 25-Mar-21 1:32 PM, David Marchand wrote:
> > Hello,
> >
> > On Mon, Apr 20, 2020 at 4:13 PM Li Feng <fengli@smartx.com> wrote:
> >>
> >> Cool, thank you, Anatoly and Kozlyuk.
> >>
> >> I haven't found how Windows implements the rte_mem_virt2phy.
> >>
> >> Using an opaque structure pointer as the first argument is a good idea.
> >
> > I pinged about this patch status 6 months ago but got no reply.
> > Trying again in public.
> >
> >  From the thread, I understand that at best it would have to be done differently.
> >
>
> I would agree with the latter. Like i said in my original response, the
> fd-less API's are already on the very of what's acceptable and in the
> perfect world we wouldn't have them in the first place, and i don't like
> the fact that they exist and would wholly discourage their use, mainly
> because of very confusing semantics of real physical address vs. DPDK's
> IOVA vs. user IOVA, and potential for errors due to trying to resolve an
> IOVA address of something that doesn't even have it.
>
> Given the above, I certainly don't like the idea of building on top of
> these API's.

Got it. Let's drop it.

>
> --
> Thanks,
> Anatoly