Centralized Summary

Centralized Summary (CS) is another improvement to speed up the mount process.
How does it work ? : CS stores all important memory structures of JFFS2 (inode cache, jeb info, raw node references, jeb lists) onto the flash at umount time. Due to it at mount time it is necessary to read only this information. CS uses an erase block called 'CS block' (logging block) where CS stores pointers to which the real information is written out. This special CS block is the first not bad block. At the first mount if this CS block contains some data (not jffs2_cent_sum_log_node) then the nodes will be moved by GC to somewhere else.


Subsections

Havasi Ferenc 2005-12-22