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 1WxCU2-0005SB-8Z for linux-mtd@lists.infradead.org; Wed, 18 Jun 2014 09:48:46 +0000 Message-ID: <53A16066.4040805@codeaurora.org> Date: Wed, 18 Jun 2014 12:48:22 +0300 From: Tanya Brokhman MIME-Version: 1.0 To: Matt Hevern , linux-mtd@lists.infradead.org Subject: Re: UBIFS becomes read-only when written, then fails to mount References: <20140618044434.GA9331@gmail.com> In-Reply-To: <20140618044434.GA9331@gmail.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On 6/18/2014 7:44 AM, Matt Hevern wrote: > Hi All, > > > I am running UBIFS on freescale i.MX28, kernel 2.6.35.3, based on > freescale's IMX tree: > http://git.freescale.com/git/cgit.cgi/imx/linux-2.6-imx.git/?h=imx_2.6.35_maintain > The flash is NAND, Micron 256MiB (MT29F2G08) > > The main mtd partition has 5 UBI volumes on it, one of which is around > 20MB UBIFS. This is used as the writeable backing store for a unionfs > filesystem which is mounted over various areas of the readonly root squashfs area. > > I noticed on one device which I was testing, that on bootup the whole > UBIFS volume had gone read-only, and I'm trying to figure out why, and if > there is anything that can be done to recover. > I built a kernel with UBIFS debuging and have attached various logs to this email, > I don't currently have access to a console on this device. > > What I have seen is that when I mount it, it mounts successfully, > but when I attempt to write a file to it, then it will fail to write > and then remount read-only. This happened on a number of successive ocasions > while i was recording log files, and then later it failed to mount at all. > I don't know what exactly led to this occuring, at the time there was > logging to the UBIFS occuring every 5 seconds, and the device will hard > power down when the battery level drops, which happens regularly. > > Does anyone have an idea what is happening here, or any options to > prevent this from happening ? > > Thanks in advance, > > Matt > > ------dmesg > UBI: attaching mtd1 to ubi0 > UBI: physical eraseblock size: 131072 bytes (128 KiB) > UBI: logical eraseblock size: 126976 bytes > UBI: smallest flash I/O unit: 2048 > UBI: VID header offset: 2048 (aligned 2048) > UBI: data offset: 4096 > UBI: attached mtd1 to ubi0 > UBI: MTD device name: "system" > UBI: MTD device size: 248 MiB > UBI: number of good PEBs: 1982 > UBI: number of bad PEBs: 2 > UBI: max. allowed volumes: 128 > UBI: wear-leveling threshold: 4096 > UBI: number of internal volumes: 1 > UBI: number of user volumes: 5 > UBI: available PEBs: 0 > UBI: total number of reserved PEBs: 1982 > UBI: number of PEBs reserved for bad PEB handling: 19 > UBI: max/mean erase counter: 80/60 > UBI: image sequence number: 1793180392 > UBI: background thread "ubi_bgt0d" started, PID 492 > ubiblka: unknown partition table > ubiblkb: unknown partition table > ubiblkc: unknown partition table > ubiblkd: unknown partition table > ubiblke: unknown partition table > .... How did you create your ubifs and ubi images? > .... > UBIFS: mounted UBI device 0, volume 5, name "config" > UBIFS: file system size: 20697088 bytes (20212 KiB, 19 MiB, 163 LEBs) > UBIFS: journal size: 4444160 bytes (4340 KiB, 4 MiB, 35 LEBs) > UBIFS: media format: w4/r0 (latest is w4/r0) > UBIFS: default compressor: none > UBIFS: reserved for root: 0 bytes (0 KiB) > UBIFS error (pid 616): ubifs_leb_unmap: unmap LEB -1 failed, error -22 > UBIFS warning (pid 616): ubifs_ro_mode: switched to read-only mode, error -22 > UBIFS error (pid 616): make_reservation: cannot reserve 160 bytes in jhead 1, error -22 > UBIFS error (pid 616): ubifs_write_inode: can't write inode 69, error -22 > > ---- > > > > > ______________________________________________________ > Linux MTD discussion mailing list > http://lists.infradead.org/mailman/listinfo/linux-mtd/ > -- QUALCOMM ISRAEL, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation