From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from mail-pd0-x22e.google.com ([2607:f8b0:400e:c02::22e])
 by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux))
 id 1ZErkf-0002mn-JB
 for linux-mtd@lists.infradead.org; Tue, 14 Jul 2015 04:23:30 +0000
Received: by pdjr16 with SMTP id r16so74502982pdj.3
 for <linux-mtd@lists.infradead.org>; Mon, 13 Jul 2015 21:23:07 -0700 (PDT)
From: Bhuvanchandra DV <bhuvanchandradv@gmail.com>
Subject: Re: UBIFS errors when file-system is full
To: Richard Weinberger <richard.weinberger@gmail.com>
References: <55A3C342.9010704@gmail.com>
 <CAFLxGvzriSX-aGh_NShqP7McyZQK6bOdnOm=yXkZSUfX=r8pzw@mail.gmail.com>
Cc: Bhuvanchandra DV <bhuvanchandradv@gmail.com>,
 "linux-mtd@lists.infradead.org" <linux-mtd@lists.infradead.org>
Message-ID: <55A48EA7.6050302@gmail.com>
Date: Tue, 14 Jul 2015 09:53:03 +0530
MIME-Version: 1.0
In-Reply-To: <CAFLxGvzriSX-aGh_NShqP7McyZQK6bOdnOm=yXkZSUfX=r8pzw@mail.gmail.com>
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 7bit
List-Id: Linux MTD discussion mailing list <linux-mtd.lists.infradead.org>
List-Unsubscribe: <http://lists.infradead.org/mailman/options/linux-mtd>,
 <mailto:linux-mtd-request@lists.infradead.org?subject=unsubscribe>
List-Archive: <http://lists.infradead.org/pipermail/linux-mtd/>
List-Post: <mailto:linux-mtd@lists.infradead.org>
List-Help: <mailto:linux-mtd-request@lists.infradead.org?subject=help>
List-Subscribe: <http://lists.infradead.org/mailman/listinfo/linux-mtd>,
 <mailto:linux-mtd-request@lists.infradead.org?subject=subscribe>

Hello Richard,

On 07/13/2015 07:39 PM, Richard Weinberger wrote:

> On Mon, Jul 13, 2015 at 3:55 PM, Bhuvanchandra DV
> <bhuvanchandradv@gmail.com> wrote:
>> Hello,
>>
>> Facing some issues with UBIFS mounting when NAND flash is almost near to
>> full.
>>
>> Hardware:
>> SOC: Freescale Vybrid
>> COM: Colibri VF50
>> Flash: Macronic NAND 128MB, 3.3V, 8-Bit
>>
>> By default the Linux Image flashed on the NAND flash almost occupies ~93% of
>> the flash.
>> Observed this issue when power resetting the module for about 500 times,
>> with journalctl
>> enabled, after around 500 power cycles the debug log fills up the nand
>> flash. When the
>> flash menory is about to full, the ubifs partation is un-mountable.
>>
>> The nand flash controller driver is under review and passed all MTD tests.
>> https://lkml.org/lkml/2015/6/18/847
>>
>>
>> Debug log during UBIFS mounting from U-Boot:
>>
>> U-Boot 2015.04 (May 18 2015 - 15:37:34)
>>
>> CPU: Freescale Vybrid VF500 at 396 MHz
>> Reset cause: POWER ON RESET
>> DRAM:  128 MiB
>> NAND:  128 MiB
>> MMC:   FSL_SDHC: 0
>> *** Warning - bad CRC, using default environment
>>
>> In:    serial
>> Out:   serial
>> Err:   serial
>> Model: Toradex Colibri VF50 128MB V1.1A, Serial# 04815679
>> Net:   FEC
>> Hit any key to stop autoboot:  0
>> Booting from NAND...
>> UBI: default fastmap pool size: 50
>> UBI: default fastmap WL pool size: 25
>> UBI: attaching mtd1 to ubi0
>> UBI: attached by fastmap
> Is this a recent kernel with all fastmap fixes applied?

I'm sorry! I didn't mention about the kernel version before.

Tested with 4.0.5 kernel[1]. I think your fastmap fixes[2] are not available with
this kernel version.

Lately also tested on 4.1.1 kernel[3], observed the same issues.

[1]http://git.toradex.com/cgit/linux-toradex.git/log/?h=toradex_vf_4.0
[2]http://lists.infradead.org/pipermail/linux-mtd/2015-April/058747.html
[3]http://git.toradex.com/cgit/linux-toradex.git/log/?h=toradex_vf_4.1-next

>
>
Best regards,
Bhuvan