Hi,
thanks for your quick answer
On Wed, Mar 08, 2017 at 01:52:03PM -0800, Jaegeuk Kim wrote:
> 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.
It is actually a Freescale (now NXP) provided kernel tagged
rel_imx_4.1.15_1.2.0_ga
available at git://git.freescale.com/imx/linux-2.6-imx.git
I surmise that the f2fs driver is the one from the linux-4.1 version.
>
> 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.
Actually F2FS_CHECK_FS was disabled, but kernel panic'ed.
>
> 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.
There wasn't a need to retrieve important data, as it is an unattended device
in the wild. The problem was that boot did not succeed anymore and the device
needed a return to our aftersales department for reflashing. Without the
'panic',
and with a read-only mount we could probably fix it without reflashing
and without return.
If that happens again, I'll try to provide more information.
>
> >
> > Philippe
--
Philippe De Muyter +32 2 6101532 Macq SA rue de l'Aeronef 2 B-1140 Bruxelles
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