Re: [RFC PATCH v4 0/2] RDMA/rxe: Add dma-buf support

[Shunsuke Mie]

Hi Jason,
Thank you for replying.

2021年12月8日(水) 2:14 Jason Gunthorpe <jgg@xxxxxxxx>:
>
> On Fri, Dec 03, 2021 at 12:51:44PM +0900, Shunsuke Mie wrote:
> > Hi maintainers,
> >
> > Could you please review this patch series?
>
> Why is it RFC?
>
> I'm confused why this is useful?
>
> This can't do copy from MMIO memory, so it shouldn't be compatible
> with things like Gaudi - does something prevent this?
I think if an export of the dma-buf supports vmap, CPU is able to access the
mmio memory.

Is it wrong? If this is wrong, there is no advantages this changes..
>
> Jason

Regards,
Shunsuke