Re: Do not understand use of oobfree

[Philip Rakity <prakity@yahoo.com>]

I am still a little confused about oobfree and jffs2.  So, Jffs2 knows
about the physical layout of the out of band area -- does not treat it
as a logical linear memory area?  The driver does not hide the layout
by providing a linear mapping to jffs2 ?  oobfree tells jffs2 where it
can put its data ?

Philip
--- Artem Bityutskiy <dedekind@infradead.org> wrote:

> On Sun, 2007-02-04 at 19:58 -0800, Philip Rakity wrote:
> > I am asking because if I have a flash device that does not map per
> the
> > standard includes do I have to touch jffs2 to get things to work. 
> 
> I've just submitted a patch which teaches UBI to use MTD_OOB_AUTO
> option. Please, make sure your driver supports it and try the patch.
> 
> The idea is that it is not application's business to know details of
> OOB
> - where ECC bytes ate stored, BB marker, etc. This is all legacy
> stuff,
> conceptually wrong. We now (thankfully) have the MTD_OOB_AUTO and it
> should be used instead. It represents free OOB bytes as a contiguous
> buffer and allows you read to it and write from it.
> 
> The patches are not in Mainline, not even in mtd-2.6.git yet. They
> are
> at
> git://git.infradead.org/~dedekind/dedekind-mtd-2.6.git.
> 
> Or web
>
http://git.infradead.org/?p=users/dedekind/dedekind-mtd-2.6.git;a=summary
> 
> Try this and send us your success story or the complaint.
> 
> P.S. I don't know why we don't remove the legacy OOB-related stuff -
> but
> I am all for it.
> 
> -- 
> Best regards,
> Artem Bityutskiy (Битюцкий Артём)
> 
> 
> 



 
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