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Date: Mon, 22 Jun 2009 19:03:46 +0530
From: apgmoorthy <moorthy.apg@samsung.com>
Subject: RE: MLC Support in JFFS2
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To: 'Artem Bityutskiy' <dedekind1@gmail.com>
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Hi Artem ,  

On Monday, June 22, 2009 1:18 PM Artem Bityutskiy wrote :
 
>> Currenlty , Is there a way to use JFFS2 with MLC Memories ?
>> 
>> If not , Felt that any one of the following patch can be of use
>> 
>> 1. http://lists.infradead.org/pipermail/linux-mtd/2007-December/020047.html
>>           - Which removes the Clean Marker.
>> 
>> 2. http://lists.infradead.org/pipermail/linux-mtd/2008-September/023101.html
>>    http://lists.infradead.org/pipermail/linux-mtd/2008-September/023044.html 
>>           - Leaving 1page/Block , for Clean Marker.
>> 
>> or some other solution, which solves the standoff.   
>> 
>> Without MLC Support , Flex-OneNAND is unsuable with JFFS2.

>Is JFFS2 usable with Flex-OneNAND by design? I thought it would have to be able to handle paired pages to become MLC-compatible. Does it do that?

Yes it do that .
There are two things in Handling MLCs
1.Paired Page Handling
This is done in Flex-OneNAND Driver.
flexonenand_lsb_page_recovery will handle that in MLC area. 

2.NOP==1
This scenario has to be dealt in synchronization with JFFS2.
This is what i asked about. 
Pathces , in the links(above)are addressing this.

With Regards
 Moorthy