Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753860Ab3COIlG (ORCPT ); Fri, 15 Mar 2013 04:41:06 -0400 Received: from mga09.intel.com ([134.134.136.24]:6135 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752256Ab3COIlE (ORCPT ); Fri, 15 Mar 2013 04:41:04 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.84,850,1355126400"; d="scan'208";a="279908645" Message-ID: <1363336921.11441.119.camel@sauron.fi.intel.com> Subject: Re: MTD : Kernel oops when remounting ubifs as read/write From: Artem Bityutskiy Reply-To: dedekind1@gmail.com To: Mark Jackson Cc: "linux-mtd@lists.infradead.org" , "linux-omap@vger.kernel.org" , lkml , adrian.hunter@intel.com Date: Fri, 15 Mar 2013 10:42:01 +0200 In-Reply-To: <1363252425.11441.94.camel@sauron.fi.intel.com> References: <5134CEF9.5070502@mimc.co.uk> <1363087506.3348.62.camel@sauron.fi.intel.com> <51405F3A.3090901@mimc.co.uk> <1363252425.11441.94.camel@sauron.fi.intel.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.6.3 (3.6.3-2.fc18) Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1346 Lines: 33 On Thu, 2013-03-14 at 11:13 +0200, Artem Bityutskiy wrote: > On Wed, 2013-03-13 at 11:12 +0000, Mark Jackson wrote: > > Sorry ... this just locks up the unit. > > OK, I've reproduced the issue with 3.9-rc2 in nandsim, see the details > below. The patch I proposed did not get the error path correctly, but it > does fix the issue. > > I think what you treat as "lockup" is the fixup process. UBIFS basically > reads the entire UBI volume and writes it back. And it uses the atomic > change UBI service, which means it also calculates CRC of everything it > writes. And this all just takes a lot of time. This has to be done only > once on the first mount. > > I've attached the following: > > 1. The patch which fixes the issue when I use nandsim. It is also > inlined in the end. Please, give it a try and be more patient - > wait longer. Please, do report your results back. >From your last e-mail I see that the patch solves the issue for you if the CRC32 problem is worked-around. I am pushing this fix to the ubifs git tree. Thanks for the report. -- Best Regards, Artem Bityutskiy -- 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/