[PATCH] NAND subpage read feature as a way to increase performance. Take 2.

[Jörn Engel]

On Fri, 16 May 2008 08:01:18 +0300, Artem Bityutskiy wrote:
> On Thu, 2008-05-15 at 17:23 +0100, Alexey Korolev wrote:
> > Hi, 
> > 
> > This patch enables NAND subpage read functionality. 
> > If upper layer drivers are requesting to read non page aligned data NAND
> > subpage-read functionality reads the only whose ECC regions which include
> > requested data when original code reads whole page.
> > This significantly improves performance in many cases. 
> > 
> > Here are some digits :
> > 
> > UBI volume mount time
> > No subpage reads: 5.75 seconds
> > Subpage read patch: 2.42 seconds
> > 
> > Open/stat time for files on JFFS2 volume:
> > No subpage read  0m 5.36s
> > Subpage read     0m 2.88s
> > 
> > Signed-off-by Alexey Korolev <akorolev at infradead.org>
> > -------------------------
> 
> Looks good to me,
> Acked-by Artem Bityutskiy <dedekind at infradead.org>

Same here
Acked-by: Joern Engel <joern at logfs.org>

Jörn

-- 
Joern's library part 6:
http://www.gzip.org/zlib/feldspar.html