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From: Nishanth Menon <menon.nishanth@gmail.com>
To: Davide CASCONE <davide.cascone@st.com>
Cc: linux-mtd@lists.infradead.org
Subject: Re: JFFS2 Control Mode Program on Sibley
Date: Thu, 25 May 2006 08:47:33 -0500	[thread overview]
Message-ID: <4475B575.1070903@gmail.com> (raw)
In-Reply-To: <001501c67fd4$b50e37c0$253682a4@nap.st.com>

Davide CASCONE wrote:
> Does JFFS2 use the Control Mode Program on Sibley device? After a my preliminary analysis, it seems that only the Object Mode Program is used. Is it right?
> 
That is correct Davide. the reason for that is that in Control mode, one
of the A/B halfs cannot be written, in short we only get 16 bits of
contiguous data in memory.

The neagitve part of using only Object mode is that Of the programming
regions/sector, we loose one complete region for the cleanmarker..
something like 128K(? dont remember off hand) for 8/12 bytes of
cleanmarker/EBH and hence the implementation using write buffering
(something we do on nand-like flash devices) on M18 flashes.

Regards,
Nishanth Menon

  reply	other threads:[~2006-05-25 13:47 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-05-25  8:24 JFFS2 Control Mode Program on Sibley Davide CASCONE
2006-05-25 13:47 ` Nishanth Menon [this message]
2006-05-25 14:01 ` Nicolas Pitre

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