From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from mga11.intel.com ([192.55.52.93])
 by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux))
 id 1UBoAH-00060H-Ja
 for linux-mtd@lists.infradead.org; Sat, 02 Mar 2013 15:15:58 +0000
Message-ID: <1362237384.2745.20.camel@sauron>
Subject: Re: [PATCH] phram: Allow the user to set the erase page size.
From: Artem Bityutskiy <dedekind1@gmail.com>
To: Patrick O'Grady <patrick@baymotion.com>
Date: Sat, 02 Mar 2013 17:16:24 +0200
In-Reply-To: <CAJ7m5OqYv_=JB9NhHsqBsa8YU0DFRoP7C+W10PY22wonAGJK=A@mail.gmail.com>
References: <CAJ7m5OqYv_=JB9NhHsqBsa8YU0DFRoP7C+W10PY22wonAGJK=A@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
Mime-Version: 1.0
Content-Transfer-Encoding: 7bit
Cc: David Woodhouse <dwmw2@infradead.org>, Joern Engel <joern@lazybastard.org>,
 linux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org
Reply-To: dedekind1@gmail.com
List-Id: Linux MTD discussion mailing list <linux-mtd.lists.infradead.org>
List-Unsubscribe: <http://lists.infradead.org/mailman/options/linux-mtd>,
 <mailto:linux-mtd-request@lists.infradead.org?subject=unsubscribe>
List-Archive: <http://lists.infradead.org/pipermail/linux-mtd/>
List-Post: <mailto:linux-mtd@lists.infradead.org>
List-Help: <mailto:linux-mtd-request@lists.infradead.org?subject=help>
List-Subscribe: <http://lists.infradead.org/mailman/listinfo/linux-mtd>,
 <mailto:linux-mtd-request@lists.infradead.org?subject=subscribe>

On Fri, 2013-02-15 at 12:35 -0800, Patrick O'Grady wrote:
> From: Patrick O'Grady <patrick@baymotion.com>
> 
> Permit the user to specify the erase page size as a parameter.
> This solves two problems:
> 
> - phram can access images made by mkfs.jffs2.  mkfs.jffs2 won't
> create images with erase sizes less than 8KiB; many architectures
> define PAGE_SIZE as 4KiB.
> 
> - Allows more effective use of small capacity devices.  JFFS2
> needs somewhere between 2 and 5 empty pages for garbage collection;
> and for an NVRAM part with only 32KiB of space, a smaller erase page
> allows much better utilization in applications where garbage collection
> is important.

Unfortunately, the patch is line-wrapped and not applicable to the
latest kernel tree. Would you please refresh and re-send properly?

-- 
Best Regards,
Artem Bityutskiy