Thanks for this Huang, I had been hoping to take a look at it this week but have run out of time. I'm keen to do some testing with it as well. Hopefully next week... Huang Ying <ying.huang@xxxxxxxxx> writes: > We have the explicit memory tiers framework to manage systems with > multiple types of memory, e.g., DRAM in DIMM slots and CXL memory > devices. Where, same kind of memory devices will be grouped into > memory types, then put into memory tiers. To describe the performance > of a memory type, abstract distance is defined. Which is in direct > proportion to the memory latency and inversely proportional to the > memory bandwidth. To keep the code as simple as possible, fixed > abstract distance is used in dax/kmem to describe slow memory such as > Optane DCPMM. > > To support more memory types, in this series, we added the abstract > distance calculation algorithm management mechanism, provided a > algorithm implementation based on ACPI HMAT, and used the general > abstract distance calculation interface in dax/kmem driver. So, > dax/kmem can support HBM (high bandwidth memory) in addition to the > original Optane DCPMM. > > Changelog: > > V1 (from RFC): > > - Added some comments per Aneesh's comments, Thanks! > > Best Regards, > Huang, Ying
