From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from b.ns.miles-group.at ([95.130.255.144] helo=radon.swed.at) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WbzKU-00041M-KS for linux-mtd@lists.infradead.org; Sun, 20 Apr 2014 21:31:15 +0000 Message-ID: <53543C7B.5000202@nod.at> Date: Sun, 20 Apr 2014 23:30:35 +0200 From: Richard Weinberger MIME-Version: 1.0 To: Tanya Brokhman Subject: Re: UBIFS CRC error, calculated from ubifs_check_node References: <53541449.9080308@codeaurora.org> <53543AFC.7050202@codeaurora.org> In-Reply-To: <53543AFC.7050202@codeaurora.org> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Dolev Raviv , "linux-mtd@lists.infradead.org" , Artem Bityutskiy List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Am 20.04.2014 23:24, schrieb Tanya Brokhman: > On 4/20/2014 11:55 PM, Richard Weinberger wrote: >> On Sun, Apr 20, 2014 at 8:39 PM, Tanya Brokhman wrote: >>> Hi All >>> >>> I'm hitting "UBIFS error (pid 1026): ubifs_check_node: bad CRC: calculated >>> 0x79dbca01, read 0x31afb5d7" and as a result the partition is remounted as >>> RO. >>> >>> I'm using 3.10 based kernel. >>> The test scenario to reproduce this is: >>> 1. fill the partition tested using dd >>> 2. try to write some more data >>> >>> There are no errors in the log from the ubi layer or from the underlying >>> nand driver, both also testing crc. >>> >>> I've tried disabling compression, mounting the partition as sync and issuing >>> the write command with sync param. None of the former has any effect on this >>> crash. >>> I tried disabling crc on data nodes. This lowered the possibility of hitting >>> the above error but eventually, with stress test of concurrent read and >>> write we hit the same error with a different node type. >>> >>> Has any one encountered similar behavior? I'm not that much familiar with >>> ubifs so any help will be highly apritiated! >> >> Before we start digging into this, do mtd-tests and ubi-tests pass? >> > > > mtd-tests: yes. Good. :) > ubi-tests: never run those. Where can I find them? I see only debug.c at mtd/ubi with helping functions but no tests. > > We're just switching to ubifs from yaffs2. I looked at the diff between linux-next and our branch (3.10 based) and tried to bring in all of the fixes in mtd and ubi layers. > I'll try running ubi-tests and update on the result. > > Do you think we should run ubifs tests as well? Are there such tests? Yes. Fetch mtd-utils source. See tests/ubi-tests directory. It contains UBI and UBIFS tests. Please run first ubi tests (runtests.sh). Thanks, //richard