On Fri, Jan 26, 2024 at 01:06:25PM -0800, Christoph Lameter (Ampere) wrote: > On Thu, 25 Jan 2024, David Rientjes wrote: > > > My dream world would be where we could discuss various use cases for > > locally attached CXL memory and determine, as a group, what the shared, > > comprehensive "Linux vision" for it is and do so before LSF/MM/BPF. In a > > perfect world, we could block out an expanded MM session in Salt Lake City > > to bring all these concepts together, what approaches sound reasonable vs > > unreasonable, and leave that conference with a clear understanding of what > > needs to happen. > > I thought the main use of CXL is as a standardized interconnect. We finally > can link up heterogeneous systems with various types of nodes in larger > system configuration. As such it could contain processor nodes, memory nodes > and i/o nodes and allow the setup of powerful systems with large address > spaces, coprocessors, diverse types of processing etc etc. if you ask 30 people what the "main use" of CXL is/will be, you will get 30 different answers. We should not try to solve world peace here. That starts with defining scope, and I think topological details should be extremely limited for a general tiering system. Otherwise we're inviting serious trouble. > > Well yes this is going to create some work but it looks like an exciting way > to move forward to more powerful system configurations. > > All of this will then be possible then in pretty small configurations of > just a couple of chips. > > >
