In the forthcoming Linux 7.2 kernel release, the exFAT file system has successfully transitioned to the iomap infrastructure. This migration has not only led to a substantial performance improvement but has also brought in several bug fixes and code refinements. Notably, Fengnan Chang, an engineer at ByteDance, meticulously optimized the iomap_iter function within the iomap framework. Through a mere two-line code modification, this adjustment has boosted the Input/Output Operations Per Second (IOPS) of both the EXT4 and XFS file systems by around 5% in certain specific scenarios.
