On Sun, Mar 10, 2024 at 11:35:13AM +0200, Leon Romanovsky wrote: > And you will need to have a way to instruct that pin_user_pages() variant > to continue anyway, because you asked for FOLL_PCI_P2PDMA. Without that > force, you will have !FOLL_PCI_P2PDMA behaviour. I don't understand what you mean. > When you say "simplify the overall interface", which interface do you mean? Primarily the dma mapping interface. Secondarily also everything around it.