Yu Liang

My contributions to the F2FS file system facilitated its deployment in billions of commercial mobile devices. I conducted a comprehensive evaluation of F2FS’s advantages and disadvantages [C9], identified its issues, and implemented numerous optimizations [J3, C8, P9] for our collaborating vendor. This collaborator became the first smartphone vendor to adopt F2FS. Today, F2FS is the de facto standard file system for mobile devices, powering billions of devices worldwide.

A F2FS TRIM optimization patch, ‘f2fs: relax async discard commands more,’ inspired by my paper [J3], was submitted to the Linux Kernel Archives by our collaborator. It has since become the default optimization in the Linux kernel.

Cache file optimization [C4, P6] and data storage/deduplication techniques [P1, P3, P4] have been adopted by our collaborating vendor and implemented in their OS to optimize storage space on mobile devices. Notably, [P4] was highlighted as a core competency during their product launch.

Developed several memory management optimization prototypes for mobile devices, based on research papers [J2, C2, C5] and patents [P2, P5, P6]. Some of these prototypes have been adopted by commercial smartphones, benefiting over 400 million users.

Aiming to enhance the data reliability of the F2FS file system, a metadata and normal data-separated storage scheme was proposed based on our profiling results in [C9].

To extend the lifetime of eMMC, I proposed reducing unnecessary data writebacks by leveraging the access patterns of mobile application files, as observed in [C4, P9].

The proposed techniques have been implemented in some commercial eMMC products of our collaborating eMMC controller vendor.