From: "Jörn Engel" <joern@logfs.org>
To: Kyungmin Park <kyungmin.park@samsung.com>
Cc: dwmw2@infradead.org, linux-mtd@lists.infradead.org
Subject: Re: [RFC][PATCH][JFFS2] JFFS2 doesn't use OOB at MLC NAND/OneNAND
Date: Wed, 5 Dec 2007 02:03:18 +0100 [thread overview]
Message-ID: <20071205010318.GG26112@lazybastard.org> (raw)
In-Reply-To: <20071205005553.GA28782@party>
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
prev parent reply other threads:[~2007-12-05 1:08 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-05 0:55 [RFC][PATCH][JFFS2] JFFS2 doesn't use OOB at MLC NAND/OneNAND Kyungmin Park
2007-12-05 1:03 ` Jörn Engel [this message]
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