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Contents
Contents
University of Szeged, Hungary
Software Engineering Department
A JFFS2 Analysis
draft version
Zoltán Sógor, Ferenc Havasi
22th December 2005
Contents
Introduction
Structures
Structures on flash
Structures in memory
Analysis
Mount time memory usage
Initialize main structures
Scan medium
Scan memory structures (Pass 1 - 3)
Read operations
Read file operation
Read directory operation
Write operations
Create an empty file
Create a non empty file
Modify a non empty file
Delete a file
Unmount time memory usage
Garbage Collection
Erase Block Summary
Structures
Structures on flash
Structures in memory
Analysis
Mount
File operations
Unmount
Centralized Summary
Structures
Structures on flash
Structures in memory
Analysis
First Erase Block mode
Mount parameter and SysFs mode
JFFS2 memory consumption
Measurements
Conclusion
About this document ...
Havasi Ferenc 2005-12-22
