Using Dynamically Layered Definite Releases for Verifying the RefFS File System

Explore a groundbreaking conference talk from OSDI '24 that delves into the verification of the RefFS file system using dynamically layered definite releases. Learn about RefFS, the first concurrent file system guaranteeing both liveness and safety with a machine-checkable proof. Discover how this innovative approach prevents termination bugs like livelocks and deadlocks through its unique specification. Gain insights into the MoLi (Modular Liveness Verification) framework and its application in verifying concurrent file systems. Understand the implications of uncovering a critical flaw in the Linux Virtual File System (VFS) locking scheme. Compare RefFS's performance to AtomFS, a state-of-the-art verified concurrent file system. This 15-minute presentation by researchers from Shanghai Jiao Tong University and Huawei Technologies offers valuable knowledge for those interested in file system verification, concurrent systems, and operating system reliability.