On Fri, May 24, 2019 at 12:40:57PM +0000, Koenig, Christian wrote:
> Sounds sane to me as well.
>
> But since I don't have a struct pages backing my PCI BAR I won't be able
> to use pci_p2pdma_map_sg.
>
> How should we work around that?
I think we've got two escalation levels here:
(1) fix the NVMe/RDMA p2p breakage for 5.2-rc - for that we just need
the above fix in the p2p map_sg routine (and add an unmap_sg
routine there)
(2) figure out how to handle the switched case for your code. I'm not
sure about that yet, and without a struct page we'd have to somehow
track the relationship explicitly.
