International Business Machines Corporation
Block input/output (I/O) accesses in the presence of a storage class memory

Abstract:

Method and apparatus for managing memory includes collocating electronic persistent memory along with a primary memory on a memory module. The electronic persistent memory and the primary memory may communicate via a module local bus comprising a plurality of memory channels. A data migration protocol may be used over a memory channel of the plurality of memory channels to copy data from the electronic persistent memory to the primary memory, and the data may be accessed from the primary memory. The combination of electronic persistent memory and primary memory (e.g. DRAM) in a single memory module with module local bus having a device controller running firmware is one implementation of storage class memory (SCM).