From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752906AbYI3JDY (ORCPT ); Tue, 30 Sep 2008 05:03:24 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751704AbYI3JDO (ORCPT ); Tue, 30 Sep 2008 05:03:14 -0400 Received: from smtp.nokia.com ([192.100.122.233]:51376 "EHLO mgw-mx06.nokia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751551AbYI3JDN convert rfc822-to-8bit (ORCPT ); Tue, 30 Sep 2008 05:03:13 -0400 Subject: Re: What is in ubifs-2.6.git From: Artem Bityutskiy Reply-To: dedekind@infradead.org To: Amit Kumar Sharma Cc: linux-fsdevel@vger.kernel.org, linux-mtd@lists.infradead.org, Adrian Hunter , linux-kernel@vger.kernel.org In-Reply-To: References: <1222766358-21886-1-git-send-email-dedekind@infradead.org> Content-Type: text/plain; charset=utf-8 Date: Tue, 30 Sep 2008 12:02:43 +0300 Message-Id: <1222765363.8051.10.camel@sauron> Mime-Version: 1.0 X-Mailer: Evolution 2.12.3 (2.12.3-5.fc8) Content-Transfer-Encoding: 8BIT X-OriginalArrivalTime: 30 Sep 2008 09:02:56.0522 (UTC) FILETIME=[545B46A0:01C922DB] X-Nokia-AV: Clean Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 2008-09-30 at 14:25 +0530, Amit Kumar Sharma wrote: > Hi Artem > > OneNAND can support for full block read also in sync burst > block read mode ,so why u want to limit bulk read only for 4 > pages , with sync burst enable u can read max 64 pages. > so in place of max 4 pages , u can set max to 64 it will be > improve performance if sync burst mode is upported. Actually UBIFS reads up to whole eraseblock. So if you have a file, and it is resided in consecutive NAND pages of an eraseblock, and UBIFS has decided to do read-ahead, it would read whole eraseblock. So for OneNAND, indeed UBIFS may read up to 64 NAND pages at one go. -- Best regards, Artem Bityutskiy (Битюцкий Артём)