[RFC][PATCH][JFFS2] JFFS2 doesn't use OOB at MLC NAND/OneNAND

[Jörn Engel]

On Wed, 5 December 2007 09:55:53 +0900, Kyungmin Park wrote:
> 
> It's the preparation patch for the MLC NAND/OneNAND flash.
> The current jffs2 implementation at NAND case uses the NOP 2, cleanmarker and data each page 0. It breaks the NOP 1 limitation in MLC flash.
> 
> With this patch, we don't write the cleanmarker at oob area.
> I'm not sure it should use the cleanmarker at data area as NOR does.
> Apart from the cleanmarker, there's serious POR issue, paired page at MLC.
> 
> The paired page problem is that if the some page is broken, the paired page is also broken even though it is written correctly at previous time.
> That's the reason the cleanmarker is not big issue at this time.
> 
> Now we support the NOP 1 and later we have to address this paired page issue. I'm not sure when this problem is addressed.
> 
> Any comments are welcome.

I like it.

Jörn

-- 
Joern's library part 3:
http://inst.eecs.berkeley.edu/~cs152/fa05/handouts/clark-test.pdf