[ECOS] jffs2 garbage collect

[Andrew Lunn]

> >What is wrong with having garbage in your filesystem anyway? 
> Because the garbage represents free space that is not available. Our 
> customer wants to update the files in flash twice a year. This is 
> potentialy all files. In worst case, all data must first be deleted and 
> then new data uploaded.

This should not be a problem, if everything is working as it
should. As i said, the garbage collection thread is only nice to
have. If the filesyste is full of garbage and you want to write more
data, a normal file operation will do a garbage collect. The space
taken by garbage should be available.

      Andrew

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