[RFC][patch] NAND partial page read functionality

Artem Bityutskiy dedekind at infradead.org
Thu Apr 24 03:11:55 EDT 2008

Hi David, Thomas,

On Thu, 2008-04-24 at 09:34 +0300, Artem Bityutskiy wrote:
> On Thu, 2007-12-13 at 18:15 +0000, Alexey Korolev wrote:
> > Hi 
> > 
> > Here is a patch providing partial page read functionality for NAND
> > devices. 
> > 
> > In many cases it gives performacne boost. I've added this feature
> > enabling under chip->options flag. 
> > Setting NAND_PART_READ option in board driver will enable this feature.
> Hamish, this stuff should certainly help you. You could give it a try.
> Unfortunately Alexey gave up almost straight away and did not try to
> push his work harder.The arguments against the patch were weak, and
> addressable. This work needs some more efforts and it may get merged.
> Moreover, Alexey came with impressive numbers, and it is difficult to
> argue against. Would you give it a try? If it gives performance benefits
> for you, I think we could raise this again.
> Look here for the full story: 
> http://lists.infradead.org/pipermail/linux-mtd/2007-December/020105.html

Could we please take a look at this work:

and identify what should be changed/done to have it merged. Alexey shows
impressive numbers there. Also, Hamish(*) shows that UBI attach time drops
from about 5.6 seconds to about 2.5 seconds which is a very substantial


*) http://lists.infradead.org/pipermail/linux-mtd/2008-April/021413.html

Best regards,
Artem Bityutskiy (Битюцкий Артём)

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