From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chao Yu Subject: Re: Data lost in Android app for not write new checkpoint Date: Fri, 07 Aug 2015 17:50:21 +0800 Message-ID: <017201d0d0f6$9fa7f060$def7d120$@samsung.com> References: <55BADD52.9060901@huawei.com> <01a401d0cb7e$bc483130$34d89390$@samsung.com> <55C0BB25.1070208@huawei.com> <012201d0d031$3baddf90$b3099eb0$@samsung.com> <55C44F8D.9030005@huawei.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from sog-mx-4.v43.ch3.sourceforge.com ([172.29.43.194] helo=mx.sourceforge.net) by sfs-ml-1.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1ZNeJN-00065o-Gw for linux-f2fs-devel@lists.sourceforge.net; Fri, 07 Aug 2015 09:51:37 +0000 Received: from mailout4.samsung.com ([203.254.224.34]) by sog-mx-4.v43.ch3.sourceforge.com with esmtps (TLSv1:AES128-SHA:128) (Exim 4.76) id 1ZNeJL-0000FO-Cy for linux-f2fs-devel@lists.sourceforge.net; Fri, 07 Aug 2015 09:51:37 +0000 Received: from epcpsbgm2new.samsung.com (epcpsbgm2 [203.254.230.27]) by mailout4.samsung.com (Oracle Communications Messaging Server 7.0.5.31.0 64bit (built May 5 2014)) with ESMTP id <0NSP02J4ZI1S04E0@mailout4.samsung.com> for linux-f2fs-devel@lists.sourceforge.net; Fri, 07 Aug 2015 18:51:28 +0900 (KST) In-reply-to: Content-language: zh-cn List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net To: 'He YunLei' Cc: 'Jaegeuk Kim' , linux-f2fs-devel@lists.sourceforge.net > Since we don't know when the data will be flushed and also what part of > file will be flushed, at the time of abnormal pow-cut, the data/metadata > of flushed file can be partial in device. So I don't think it's not Should be: of flushed file can be partial in device. So I don't think it's My bad, sorry about that. > possible for us to recover this kind of file with current fsync/recovery > policy of f2fs. ------------------------------------------------------------------------------