Limited support of NAND features in MTD.

[David Woodhouse]

On Wed, 2007-12-19 at 13:57 +0200, Artem Bityutskiy wrote:
> On Wed, 2007-12-19 at 10:52 +0000, David Woodhouse wrote:
> > On Wed, 2007-12-19 at 10:49 +0000, Alexey Korolev wrote:
> > > Hmm I did not heard about this. Could you please give more details on
> > > how partial page read can suffer from lack of ECC?
> > 
> > If your ECC covers the whole page, you have to read the whole page in
> > order to check ECC.
> > 
> > Of course, if you do ECC in sub-pages in the first place, you can read
> > only a single ECC block. But you still can't just read arbitrary byte
> > ranges.
> 
> Sure, but as the guys showed, even this gives substantial JFFS2
> performance growth. Providing their figures are correct, subpage reads
> are more then worth using.

Yeah, that part makes sense.

-- 
dwmw2