UBIFS errors when file-system is full

[Bhuvanchandra DV]

Hello Richard,

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

> On Mon, Jul 13, 2015 at 3:55 PM, Bhuvanchandra DV
> <bhuvanchandradv at 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