On Wed, Jan 30, 2019 at 11:13:11AM -0700, Logan Gunthorpe wrote: > > > On 2019-01-30 10:44 a.m., Jason Gunthorpe wrote: > > I don't see why a special case with a VMA is really that different. > > Well one *really* big difference is the VMA changes necessarily expose > specialized new functionality to userspace which has to be supported > forever and may be difficult to change. The only user change here is that more things will succeed when creating RDMA MRs (and vice versa to GPU). I don't think this restricts the kernel implementation at all, unless we intend to remove P2P entirely.. Jason
