From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.nokia.com ([192.100.122.233] helo=mgw-mx06.nokia.com) by bombadil.infradead.org with esmtps (Exim 4.68 #1 (Red Hat Linux)) id 1Kkb8O-0007sh-6K for linux-mtd@lists.infradead.org; Tue, 30 Sep 2008 09:03:09 +0000 Subject: Re: What is in ubifs-2.6.git From: Artem Bityutskiy To: Amit Kumar Sharma 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 Content-Transfer-Encoding: quoted-printable Cc: linux-fsdevel@vger.kernel.org, linux-mtd@lists.infradead.org, Adrian Hunter , linux-kernel@vger.kernel.org Reply-To: dedekind@infradead.org List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Tue, 2008-09-30 at 14:25 +0530, Amit Kumar Sharma wrote: > Hi Artem >=20 > OneNAND can support for full block read also in sync burst=20 > block read mode ,so why u want to limit bulk read only for 4=20 > 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=20 > 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. --=20 Best regards, Artem Bityutskiy (=D0=91=D0=B8=D1=82=D1=8E=D1=86=D0=BA=D0=B8=D0=B9 =D0=90= =D1=80=D1=82=D1=91=D0=BC) From mboxrd@z Thu Jan 1 00:00:00 1970 From: Artem Bityutskiy Subject: Re: What is in ubifs-2.6.git Date: Tue, 30 Sep 2008 12:02:43 +0300 Message-ID: <1222765363.8051.10.camel@sauron> References: <1222766358-21886-1-git-send-email-dedekind@infradead.org> Reply-To: dedekind@infradead.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: linux-fsdevel@vger.kernel.org, linux-mtd@lists.infradead.org, Adrian Hunter , linux-kernel@vger.kernel.org To: Amit Kumar Sharma Return-path: 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 In-Reply-To: Sender: linux-fsdevel-owner@vger.kernel.org List-ID: On Tue, 2008-09-30 at 14:25 +0530, Amit Kumar Sharma wrote: > Hi Artem >=20 > OneNAND can support for full block read also in sync burst=20 > block read mode ,so why u want to limit bulk read only for 4=20 > 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=20 > 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. --=20 Best regards, Artem Bityutskiy (=D0=91=D0=B8=D1=82=D1=8E=D1=86=D0=BA=D0=B8=D0=B9 =D0=90= =D1=80=D1=82=D1=91=D0=BC) -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel= " in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html