On Tue, Nov 23, 2021 at 02:39:19PM +0100, David Hildenbrand wrote:

quoted

quoted

2) Could be provide a mmu variant to ordinary users that's just good
enough but maybe not as fast as what we have today? And limit
FOLL_LONGTERM to special, privileged users?

rdma has never been privileged

Feel free to correct me if I'm wrong: it requires special networking
hardware and the admin/kernel has to prepare the system in a way such
that it can be used.

Not really, plug in the right PCI card and it works

"special" is a bit of a reach since almost every NIC sold in the > 100GB
segment supports some RDMA.

Jason