OPPO Kernel Craftsman

Dec 18, 2020 · Fundamentals

Linux Kernel File Cache Mechanism: In-Depth Analysis of Read/Write Processes and Pre-reading Algorithm

The article thoroughly explains Linux kernel file cache, detailing how read() and write() operations traverse VFS to the block layer, the adaptive read‑ahead algorithm that pre‑loads sequential pages, the internal functions such as generic_file_buffered_read and ondemand_readahead, and outlines write handling and future topics on mmap and cache reclamation.