From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.codeaurora.org ([198.145.11.231]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WbzEE-00019j-Do for linux-mtd@lists.infradead.org; Sun, 20 Apr 2014 21:24:46 +0000 Message-ID: <53543AFC.7050202@codeaurora.org> Date: Mon, 21 Apr 2014 00:24:12 +0300 From: Tanya Brokhman MIME-Version: 1.0 To: Richard Weinberger Subject: Re: UBIFS CRC error, calculated from ubifs_check_node References: <53541449.9080308@codeaurora.org> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed 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: , 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. 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? Thank you for the prompt reply! -- QUALCOMM ISRAEL, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation