From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932161Ab2JQLPU (ORCPT ); Wed, 17 Oct 2012 07:15:20 -0400 Received: from mail-we0-f174.google.com ([74.125.82.174]:59753 "EHLO mail-we0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753010Ab2JQLN7 convert rfc822-to-8bit (ORCPT ); Wed, 17 Oct 2012 07:13:59 -0400 MIME-Version: 1.0 In-Reply-To: References: <415E76CC-A53D-4643-88AB-3D7D7DC56F98@dubeyko.com> <9DE65D03-D4EA-4B32-9C1D-1516EAE50E23@dubeyko.com> <1349553966.12699.132.camel@kjgkr> <50712AAA.5030807@gmail.com> <002201cda46e$88b84d30$9a28e790$%kim@samsung.com> <004101cda52e$72210e20$56632a60$%kim@samsung.com> <55A93BD0-CBCB-4707-A970-EB823EC54B2D@dubeyko.com> <006f01cda5ec$e63e9b60$b2bbd220$%kim@samsung.com> <1349855868.1889.87.camel@slavad-ubuntu> <009f01cda6cb$b8cb1020$2a613060$%kim@samsung.com> Date: Wed, 17 Oct 2012 20:13:57 +0900 Message-ID: Subject: Re: [PATCH 00/16] f2fs: introduce flash-friendly file system From: Namjae Jeon To: Changman Lee Cc: Jaegeuk Kim , Vyacheslav Dubeyko , Marco Stornelli , Jaegeuk Kim , Al Viro , "tytso@mit.edu" , "gregkh@linuxfoundation.org" , "linux-kernel@vger.kernel.org" , "chur.lee@samsung.com" , "cm224.lee@samsung.com" , "jooyoung.hwang@samsung.com" , "linux-fsdevel@vger.kernel.org" Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 2012/10/11, Changman Lee : > 2012년 10월 11일 목요일에 Namjae Jeon님이 작성: >> 2012/10/10 Jaegeuk Kim : >> >>>> >>>> I mean that every volume is placed inside any partition (MTD or GPT). > Every partition begins from any >>>> physical sector. So, as I can understand, f2fs volume can begin from > physical sector that is laid >>>> inside physical erase block. Thereby, in such case of formating the > f2fs's operation units will be >>>> unaligned in relation of physical erase blocks, from my point of view. > Maybe, I misunderstand >>>> something but it can lead to additional FTL operations and performance > degradation, from my point of >>>> view. >>> >>> I think mkfs already calculates the offset to align that. >> I think this answer is not what he want. >> If you don't use partition table such as dos partition table or gpt, I >> think that it is possible to align using mkfs. >> But If we should consider partition table space in storage, I don't >> understand how it could be align using mkfs. >> >> Thanks. > > We can know the physical starting sector address of any partitions from > hdio geometry information got by ioctl. If so, first block and end block of partition are useless ? Thanks. > >>> Thanks, >>> >>> -- >>> 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 >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-kernel" >> in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> Please read the FAQ at http://www.tux.org/lkml/ >> >