Last year Valve in cooperation with consulting firm Collabora published their work on extending the futex system call for more optimal thread pool synchronization with a means of waiting on any of several futexes. This kernel-level work paired with patched user-space for Wine/Proton allows better matching behavior on Windows. It’s been months since hearing anything on Valve’s futex effort while today a futex2 system call was published for discussion…

Source: Phoronix – Futex2 Proposed In Latest Effort For Linux Kernel Optimization That Can Benefit Gamers