On Fri 13-10-17 10:20:06, Cristopher Lameter wrote: > On Fri, 13 Oct 2017, Michal Hocko wrote: [...] > > I am not really convinced this is a good interface. You are basically > > trying to bypass virtual memory abstraction and that is quite > > contradicting the mmap API to me. > > This is a standardized posix interface as described in our presentation at > the plumbers conference. See the presentation on contiguous allocations.
Are you trying to desing a generic interface with a very specific and HW dependent usecase in mind? > The contiguous allocations are particularly useful for the RDMA API which > allows registering user space memory with devices. then make those devices expose an implementation of an mmap which does that. You would get both a proper access control (via fd), accounting and others. -- Michal Hocko SUSE Labs
