From mboxrd@z Thu Jan  1 00:00:00 1970
From: =?utf-8?B?SsO2cm4=?= Engel <joern@logfs.org>
Subject: Re: logfs: max 4K writepage size
Date: Wed, 7 Sep 2011 08:56:21 +0200
Message-ID: <20110907065621.GL32018@logfs.org>
References: <CAMjNe_fdRw=5-MjOii8aGfEvejPo-dR6Rpf1=JQf_gMJ3U9jfQ@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Cc: linux-fsdevel@vger.kernel.org, linux-mtd@lists.infradead.org
To: srimugunthan dhandapani <srimugunthan.dhandapani@gmail.com>
Return-path: <linux-mtd-bounces+gldm-linux-mtd-36=gmane.org@lists.infradead.org>
Content-Disposition: inline
In-Reply-To: <CAMjNe_fdRw=5-MjOii8aGfEvejPo-dR6Rpf1=JQf_gMJ3U9jfQ@mail.gmail.com>
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>
Sender: linux-mtd-bounces@lists.infradead.org
Errors-To: linux-mtd-bounces+gldm-linux-mtd-36=gmane.org@lists.infradead.org
List-Id: linux-fsdevel.vger.kernel.org
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