Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754954AbYFCJFh (ORCPT ); Tue, 3 Jun 2008 05:05:37 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752046AbYFCJFa (ORCPT ); Tue, 3 Jun 2008 05:05:30 -0400 Received: from pentafluge.infradead.org ([213.146.154.40]:50691 "EHLO pentafluge.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752013AbYFCJF3 (ORCPT ); Tue, 3 Jun 2008 05:05:29 -0400 Date: Tue, 3 Jun 2008 10:05:26 +0100 (BST) From: Alexey Korolev To: David Woodhouse cc: Jared Hulbert , linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [BUG] JFFS2 power loss recovery issues in 2.6.25, 2.6.26-rc In-Reply-To: <1212407774.16924.120.camel@pmac.infradead.org> Message-ID: References: <6934efce0805301224t5e5d7a01n3b652c4df5324d58@mail.gmail.com> <1212407774.16924.120.camel@pmac.infradead.org> User-Agent: Alpine 1.10 (LFD 962 2008-03-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-SRS-Rewrite: SMTP reverse-path rewritten from by pentafluge.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1390 Lines: 32 Hi David, > On Mon, 2008-06-02 at 12:41 +0100, Alexey Korolev wrote: > > Hi, > > > > We made some investigations for this issue and found commit number which > > > > breaks JFFS2 power loss recoverability. > > > > It is: [JFFS2] Improve getdents vs. f_pos handling on NOR flash. > > > > http://git.infradead.org/mtd-2.6.git?a=commitdiff;h=15953580e79b58caefb107e77f218e009b9992e6 > > > > > > > > Currently we don't know why it breaks JFFS2 and how it could be fixed > > > > except roll back. > > > > > > Does everything work when you unmerge this one commit? > > > > > Correct, commit roll back fixes the problem. > > But leaves another one. I was away last week, and I'm home now -- I'll > try to reproduce and understand what's going on. > > We made more investigations of this problem. Joakim has assisted us to understan the patch. This patch can't break PLR feature on NAND. The only way it affects on tests is timing. So commit roll back will not fix the problem, but hides. Now we are collecting more information about the problem. We will let you know as soon as we find something interesting about it. Thanks, Alexey -- 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/