Open Source Summit Europe 2024

DAMON is a Linux kernel subsystem for efficient data access monitoring that has been integrated into the mainline since v5.15. The subsystem has been further developed into an access-aware system operating engine. In addition, userspace tools for DAMON have been developed to provide a human-friendly interface and additional userspace capabilities. Several major Linux distributions now offer DAMON-enabled kernels and user-space tool packages. Of course, not all use cases for DAMON are known, but the DAMON maintainer has been privileged to hear about some interesting and creative uses of DAMON from several people who primarily use DAMON for memory efficiency in their prototypes, researches, and products. In this talk, we'll give a brief introduction to the practical benefits and unique internal mechanisms that DAMON provides, with live demos of key features. We'll then detail real-world examples of DAMON use in prototypes, researches, and products. Finally, we'll show you how you can join the project community for participating to the development or get help. The rest of the talk will be followed by a Q&A.