This online article by Ricardo Galli of the Dept. de Matemàtiques i Informàtica, Universitat de les Illes Balears, explains the implementation of all of the common journaling file systems available for Linux. Galli writes . . .

“This article presents all of the journal file systems available for Linux: Ext3, ReiserFS, XFS and JFS. We also introduce the basic concepts of file systems, buffer-cache, and page-cache implemented in the Linux kernel. The performance of the different file systems is strongly affected by those optmization techniques. Indeed, not only the performance is affected, but also the implementation and porting of the different file systems. SGI introduced a new module, pagebuf, that serves as the interface between their own XFS buffering techniques and the Linux page cache . . .”

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