Re: f2fs_bug_on in init_dirty_segmap

[Jaegeuk Kim <jaegeuk@kernel.org>]

Hi,

On 03/08, Philippe De Muyter wrote:
> Hi f2fs developpers,
> 
> Please excuse my maybe dumb question.
> 
> I recently encountered a kernel panic at root mount time (thus making my
> system unusable, as my root partition is formatted as f2fs) due to the
> following segment in fs/f2fs/segment.c:init_dirty_segmap
> 
> 		if (valid_blocks > sbi->blocks_per_seg) {
>                         f2fs_bug_on(sbi, 1); <<<<<<<<<<<<<<<<<<<<
> 			continue;
> 		}
> 
> Is that really a condition requiring a kernel panic, or could a read-only
> mount be allowed ?

It would be helpful that you can remain your kernel and f2fs-tools version
information, as well as fsck.f2fs result.

You can get the latest f2fs-tools from
http://git.kernel.org/cgit/linux/kernel/git/jaegeuk/f2fs-tools.git/log/?h=dev-test

Anyway, if you don't have time, you may have some options like:

1. disable F2FS_CHECK_FS in Kconfig
 : bypass BUG_ON here, so mount-ro would be preferable.

2. run fsck.f2fs
 : fix some inconsistency and let you mount your system again.

So, I think you'd better try #1 to retrieve your important data, and then
#2 to fix something wrong.

Thanks,

> 
> Philippe
> 
> -- 
> Philippe De Muyter +32 2 6101532 Macq SA rue de l'Aeronef 2 B-1140 Bruxelles
> 
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