From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754177Ab1LLVTt (ORCPT ); Mon, 12 Dec 2011 16:19:49 -0500 Received: from mail-lpp01m010-f46.google.com ([209.85.215.46]:49546 "EHLO mail-lpp01m010-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753643Ab1LLVTq (ORCPT ); Mon, 12 Dec 2011 16:19:46 -0500 Subject: Re: [PATCH 3/3] mtd/nand : workaround for Freescale FCM to support large-page Nand chip From: Artem Bityutskiy Reply-To: dedekind1@gmail.com To: Scott Wood Cc: shuo.liu@freescale.com, dwmw2@infradead.org, Artem.Bityutskiy@nokia.com, linux-mtd@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, akpm@linux-foundation.org, linux-kernel@vger.kernel.org, leoli@freescale.com 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" X-Mailer: Evolution 3.0.3 (3.0.3-1.fc15) Content-Transfer-Encoding: 7bit Message-ID: <1323724784.2297.20.camel@koala> Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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.