JFFS2 losing dirs/files on NAND flash

[Suresh R]

Hi,

Even I have faced a similar issue with the JFFS2 on onenand on
2.6.16-rc3. I too was not able to reproduce the issue by shutting down
abruptly, but it happens on our products on the field.

I looks to me that it happens when switched off during a GC. I am not
sure. I was not able to prove to myself this theory. Where ever I
reported this issue, I was told to use a new kernel.

Suresh

On Mon, Oct 27, 2008 at 1:42 PM, Marco Braga <marco.braga at gmail.com> wrote:
> Hello,
>
> I am using JFFS2 on an ARM base board with a 128Mb NAND flash, kernel
> 2.6.22.10. Sometimes the board does not boot because a directory in
> /etc has disappeared after a JFFS2 error or a file is missing data.
> I'm trying to understand at what level (hardware, kernel, MTD, file
> system) it happens. The error appears when trying to access the
> directory or file:
>
> JFFS2 warning: (96) jffs2_do_read_inode_internal: no data nodes found
> for ino #65
> JFFS2 notice: (96) jffs2_do_read_inode_internal: but it has children
> so we fake some modes for it
> JFFS2 warning: (96) jffs2_do_read_inode_internal: no data nodes found
> for ino #97
> JFFS2 notice: (96) jffs2_do_read_inode_internal: but it has children
> so we fake some modes for it
> ...
>
> I've not been able to relate it to an unclean shutdown. I've tried
> powering off the board several times without being able to make the
> problem happen. Moreover I've tried a multithreaded program that
> opens, writes, reads and deletes several files to stress the FS and it
> never happened after an overnight run.
>
> Can you please help understanding the cause or the meaning of those log lines?
> Thank you!
>
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