Sohu Tech Products
Mar 9, 2022 · Fundamentals
Understanding the Linux File I/O Stack: VFS, Filesystem, Block Layer, and SCSI
This article explains the Linux file I/O stack by outlining its clear route from user space to hardware, detailing the roles of VFS, the filesystem, the block layer, and the SCSI driver, and then dives into page cache mechanisms and code paths for both buffered and direct I/O.
I/O StackKernelLinux
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