Host managed memory shared by multiple host systems in a high availability system

Abstract

A high availability system including multiple host systems includes a host managed device memory that is shared between the multiple host systems allowing faster communication between the host systems. Access to the host managed device memory in a memory expander card is via direct memory access from the host system. Memory expander card control circuitry in the memory expander card performs memory translation, gatekeeping and synchronization. A host system can access the host managed device memory in the memory expander card directly using cxl.cache and cxl.mem protocols. From the host system perspective, the host managed device memory in the memory expander card is directly attached using a memory mapped interface.

Dependencies are inferred from the claim text.