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Re: 4k-aligned nodes



On Tue, 2004-12-07 at 15:59 +0100, Jörn Engel wrote:
> Solution:
> GC always tries to write out 4k-aligned nodes with 4k of uncompressed
> data.

We've been doing that in JFFS2 since February 2001. :)

> This also causes GC to run into corner-cases and occasionally use more
> flash footprint than original data.  But in the long run, it should
> cause data to be in the most efficient format on-flash.

That's why we have an extra threshold, for the amount of free space
which is required for GC to merge nodes. See the logic in
jffs2_garbage_collect_dnode() which expands 'start' and 'end'.

-- 
dwmw2


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