State of Futex2

Explore the current state of futex2, a new interface designed to overcome limitations in the existing futex syscall for modern workloads. Delve into the research behind futex2, including discussions with userspace developers and proposed implementations. Learn about the different approaches taken in developing futex2, its potential use cases, and how it aims to address issues faced by the previous iteration. Gain insights into the futex API, futex fewtax, variable sizes, NUMA awareness, and NUMA syntax. This 21-minute conference talk, presented by André Almeida at LCA 2022 Online, provides an update on the futex2 syscall and its implications for Linux and open-source software development.