Explore a conference talk on MadFS, a novel approach to per-file virtualization for userspace persistent memory filesystems. Learn about the challenges of managing persistent memory in userspace and how MadFS addresses them through embedded metadata, copy-on-write for crash consistency, and lock-free optimistic concurrency control. Discover how this innovative filesystem achieves significant performance improvements over existing solutions, with up to 3.6x throughput compared to ext4-DAX and substantial speedups for real-world applications like YCSB on LevelDB and TPC-C on SQLite. Gain insights into the design, implementation, and evaluation of MadFS, including its simplified architecture, metadata management techniques, and performance in concurrent workload scenarios.