From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-lpp01m010-f49.google.com ([209.85.215.49]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1RaDHn-00073b-Dd for linux-mtd@lists.infradead.org; Mon, 12 Dec 2011 21:19:48 +0000 Received: by lahc1 with SMTP id c1so688309lah.36 for ; Mon, 12 Dec 2011 13:19:45 -0800 (PST) Subject: Re: [PATCH 3/3] mtd/nand : workaround for Freescale FCM to support large-page Nand chip From: Artem Bityutskiy To: Scott Wood Date: Mon, 12 Dec 2011 23:19:37 +0200 In-Reply-To: <4EE66EFE.1050608@freescale.com> References: <1322973098-2528-1-git-send-email-shuo.liu@freescale.com> <1322973098-2528-3-git-send-email-shuo.liu@freescale.com> <4EDEAEB9.6020703@freescale.com> <1323724195.2297.11.camel@koala> <4EE66EFE.1050608@freescale.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Message-ID: <1323724784.2297.20.camel@koala> Mime-Version: 1.0 Cc: Artem.Bityutskiy@nokia.com, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, shuo.liu@freescale.com, linux-mtd@lists.infradead.org, akpm@linux-foundation.org, leoli@freescale.com, dwmw2@infradead.org Reply-To: dedekind1@gmail.com List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Mon, 2011-12-12 at 15:15 -0600, Scott Wood wrote: > NAND chips come from the factory with bad blocks marked at a certain > offset into each page. This offset is normally in the OOB area, but > since we change the layout from "4k data, 128 byte oob" to "2k data, 64 > byte oob, 2k data, 64 byte oob" the marker is no longer in the oob. On > first use we need to migrate the markers so that they are still in the oob. Ah, I see, thanks. Are you planning to implement in-kernel migration or use a user-space tool? Artem.