Space-Control: Process-Level Isolation for Sharing CXL-based Disaggregated Memory

• URL: http://arxiv.org/abs/2603.06951v1
• Date: Fri, 06 Mar 2026 23:56:55 GMT
• Title: Space-Control: Process-Level Isolation for Sharing CXL-based Disaggregated Memory
• Abstract summary: Space-Control is a hardware-software co-design that provides fine-grained, process-level isolation for shared disaggregated memory.<n>Our design allows up to 127 processes Simulation Toolkit (SST) based CXL model, Space-Control incurs minimal performance overhead of 3.3%.
• Score: 2.3612458921097246
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Memory disaggregation via Compute Express Link (CXL) enables multiple hosts to share remote memory, improving utilization for data-intensive workloads. Today, virtual memory enables process-level isolation on a host and CXL enables host-level isolation. This creates a critical security gap: the absence of process-level memory isolation in shared disaggregated memory. We present Space-Control, a hardware-software co-design that provides fine-grained, process-level isolation for shared disaggregated memory. Space-Control authenticates execution context in the hardware and enforces access control on every memory access and amortizes lookup times with a small cache. Our design allows up to 127 processes Simulation Toolkit (SST) based CXL model, Space-Control incurs minimal performance overhead of 3.3%, making shared disaggregated memory isolation practical.

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