Sorry, you need to enable JavaScript to visit this website.

SNIA Developer Conference September 15-17, 2025 | Santa Clara, CA

Technical Director

Micron Technology

John Groves has been a kernel and system software developer for decades, working on memory management, file systems and data storage in several Unix variants prior to Linux. John serves the CXL Consortium as co-chair of the Software and Systems Working Group (SSWG), and is a contributor to the CXL specification - particularly in the areas of fabric management, shared memory and dynamic capacity devices (DCDs). John is also the creator and primary author of famfs – the Fabric-Attached Memory File System – which is working its way toward inclusion the Linux Kernel. John has spoken on famfs at the last two Linux Plumbers conferences (2023 and 2024) as well as the Linux Storage, Filesystem and Memory Management (LSFMM) summits in 2024 and 2025 and Usenix FAST in 2025. John is an expert in system software development, cache coherency, memory models and CXL.

Related Sessions

File Systems & Protocols

Famfs: Get Ready for Big Pools of Disaggregated Shared Memory

CXL enables disaggregated memory, both for composable capacity-on-demand and shared-memory. That is memory is not private to one server. Adding system-ram capacity should largely “just work”, but shared memory is more complex. The Fabric-Attached Memory File System (famfs) enables disaggregated shared memory to be used as memory-mappable files that map directly to the shared memory. Famfs is open source software which is on-track to be merged into the upstream Linux kernel in the coming months. 

This talk covers the following: * Brief: shared memory challenges before memory disaggregation * Shared memory challenges with disaggregation * CXL: what will disaggregated shared memory look like? 1. Dynamic Capacity Device (DCD) overview 2. Coherency options 3. Using raw disaggregated memory * Famfs: Putting disaggregated shared memory to use with little or no app modifications Famfs background * Famfs on github * Famfs at the Linux Plumbers Conference (2023, 2024) * Famfs at the Linux Storage, File System and Memory Management summit (LSFMM – 2024, 2025) * Famfs at the Usenix File and Storage Technologies conference (FAST – 2025)

John Groves
Technical Director
Micron Technology
0

Follow us on X

SDC 2025 is brought to you by SNIA. SNIA is an industry association committed to its mission of worldwide leadership developing and promoting architectures, standards, education and vendor-neutral collaboration.