Sep 12 – 14, 2022
Europe/Dublin timezone

Meta’s CXL Journey and Learnings in Linux

Sep 13, 2022, 5:00 PM
"Lansdowne" (Clayton Hotel on Burlington Road)


Clayton Hotel on Burlington Road

LPC Refereed Track LPC Refereed Track


Jonathan Zhang


Compute Express Link (CXL) is a new open interconnect technology built on top of PCIe.
Among other features, it enables memory expansion, unified system address space and cache
coherency. It has the potential to enable SDM (Software Defined Memory) and emerging
usage models of accelerators.

Meta has been working on CXL with current focus on memory expansion. This presentation
will discuss Meta's experiences, learnings, pain points and expectations for Linux
kernel/OS to support CXL's value proposition and at-scale data center deployment. It
touches upon aspects such as transparent memory expansion, device management at scale,
RAS, etc. Meta looks forward to further collaboration with the Linux community to improve CXL
technology and to enable the CXL ecosystem.

Primary author

Jonathan Zhang

Presentation materials

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