OPPO Kernel Craftsman

May 22, 2020 · Mobile Development

An Overview of sdcardfs: Architecture, Comparison with FUSE, and Performance Advantages

sdcardfs is a kernel-space stackable virtual file system built on wrapfs, replacing FUSE on Android O, offering better I/O performance by reducing user‑kernel transitions and avoiding double caching, while not managing actual SD cards; it forwards operations directly, achieving near‑native speeds.