From: Boris Brezillon <boris.brezillon@free-electrons.com>
To: Andrea Marson <andrea.marson@dave.eu>
Cc: Andrea Scian <rnd4@dave-tech.it>,
"Jeff Lauruhn \(jlauruhn\)" <jlauruhn@micron.com>,
linux-mtd@lists.infradead.org,
"dedekind1@gmail.com" <dedekind1@gmail.com>,
Richard Weinberger <richard@nod.at>
Subject: Re: RFC: detect and manage power cut on MLC NAND (linux-mtd Digest, Vol 144, Issue 70)
Date: Wed, 18 Mar 2015 10:03:55 -0000 [thread overview]
Message-ID: <20150318110325.3c5e2035@bbrezillon> (raw)
In-Reply-To: <55094BBF.7050009@dave.eu>
On Wed, 18 Mar 2015 10:56:15 +0100
Andrea Marson <andrea.marson@dave.eu> wrote:
> >
> > IIUC, you want to select SLC/MLC mode on a per-partition basis, that
> > should be feasible, and this would be particularly useful for bootloader
> > partitions (where UBI is not involved).
> That's exactly what I was thinking about.
> However it is still not clear to me how this should be implemented. I
> have read a datasheet saying that "SLC mode" consists of halving block
> addresses, that is higher bit of block address lines must be set to low.
> I wonder if this strategy prevents paired page related issues. I think
> one should work at page addressing level instead, in order to use pages
> that are not paired only. Do you think it makes sense?
Yes, actually implementing the SLC mode in software is quite easy, the
only thing we need is a description of which pages are paired together
in a block.
Moreover, by doing that in SW we won't have to deal with each vendor
implementation of "SLC mode".
--
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
next prev parent reply other threads:[~2015-03-18 10:03 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-10 11:57 RFC: detect and manage power cut on MLC NAND Andrea Scian
2015-03-10 12:51 ` Richard Weinberger
2015-03-11 7:20 ` Artem Bityutskiy
2015-03-11 8:57 ` Richard Weinberger
2015-03-11 9:05 ` Artem Bityutskiy
2015-03-11 9:09 ` Richard Weinberger
2015-03-11 17:01 ` Andrea Scian
2015-03-11 17:23 ` Jeff Lauruhn (jlauruhn)
2015-03-11 17:29 ` Richard Weinberger
2015-03-11 21:16 ` Jeff Lauruhn (jlauruhn)
2015-03-12 10:28 ` Richard Weinberger
2015-03-12 22:57 ` Jeff Lauruhn (jlauruhn)
2015-03-13 20:31 ` Boris Brezillon
2015-03-13 23:51 ` Jeff Lauruhn (jlauruhn)
2015-03-14 9:46 ` Andrea Marson - DAVE Embedded Systems
2015-03-16 16:02 ` Jeff Lauruhn (jlauruhn)
2015-03-17 8:00 ` Andrea Scian
2015-03-14 10:32 ` Boris Brezillon
2015-03-16 21:11 ` Jeff Lauruhn (jlauruhn)
2015-03-17 9:30 ` Andrea Scian
2015-03-17 10:02 ` Boris Brezillon
2015-03-17 16:42 ` Jeff Lauruhn (jlauruhn)
2015-03-18 8:45 ` RFC: detect and manage power cut on MLC NAND (linux-mtd Digest, Vol 144, Issue 70) Andrea Marson
2015-03-18 9:07 ` Boris Brezillon
2015-03-18 9:56 ` Andrea Marson
2015-03-18 10:03 ` Boris Brezillon [this message]
2015-03-18 12:07 ` Richard Weinberger
2015-03-18 17:11 ` Jeff Lauruhn (jlauruhn)
2015-03-18 16:12 ` Jeff Lauruhn (jlauruhn)
2015-03-19 8:47 ` RFC: detect and manage power cut on MLC NAND Andrea Marson
2015-03-19 9:12 ` Boris Brezillon
2015-03-19 17:45 ` Jeff Lauruhn (jlauruhn)
2015-03-20 0:25 ` Iwo Mergler
2015-03-20 3:38 ` nick
2015-03-20 5:40 ` Iwo Mergler
2015-03-20 8:26 ` Boris Brezillon
2015-03-20 17:15 ` Nick Krause
2015-03-22 23:45 ` Iwo Mergler
2015-03-23 2:18 ` Iwo Mergler
2015-03-23 7:06 ` Artem Bityutskiy
2015-03-23 19:05 ` Boris Brezillon
2015-03-24 7:05 ` Artem Bityutskiy
2015-03-19 18:00 ` Jeff Lauruhn (jlauruhn)
2015-03-20 8:07 ` Andrea Marson
2015-03-17 17:04 ` Jeff Lauruhn (jlauruhn)
2015-03-16 9:01 ` Ricard Wanderlof
2015-03-16 17:27 ` Jeff Lauruhn (jlauruhn)
2015-03-14 10:03 ` Richard Weinberger
2015-03-12 9:32 ` Ricard Wanderlof
2015-03-23 4:08 ` Iwo Mergler
2015-03-23 21:15 ` Jeff Lauruhn (jlauruhn)
2015-03-24 1:17 ` Iwo Mergler
2015-03-24 16:50 ` Jeff Lauruhn (jlauruhn)
2015-03-25 3:38 ` Iwo Mergler
2015-03-25 8:33 ` Ricard Wanderlof
2015-03-26 1:57 ` Jeff Lauruhn (jlauruhn)
2015-03-26 8:55 ` Ricard Wanderlof
2015-03-11 7:21 ` Artem Bityutskiy
[not found] <mailman.37176.1426610573.22890.linux-mtd@lists.infradead.org>
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