Adding Functionality to Make Windows Games Run Faster on Linux

Explore the process of enhancing Linux kernel functionality to improve Windows game performance through Wine compatibility layer in this 40-minute conference talk. Delve into the implementation of Windows APIs GetWriteWatch() and ResetWriteWatch() on Linux, focusing on memory management and write-tracking state of pages. Learn about the evolution from soft-dirty PTE flag-based to Userfaultfd's Write Protect PTE flag-based implementation, including the addition of PAGEMAP_SCAN IOCTL and Userfaultfd features. Gain insights into the challenges, constraints, and solutions encountered during development, and examine the resulting performance improvements for running Windows games on Linux systems.