Re: BUG: unable to handle kernel NULL pointer dereference at 00000048

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On Wed, 7 Mar 2012 00:07:24 +0300, Slicky Devil wrote:
> On Tue, Mar 6, 2012 at 5:54 PM, Ryusuke Konishi
> <konishi.ryusuke@xxxxxxxxxxxxx> wrote:
> > Hmmm.  Did you shrink the filesystem with nilfs-resize tool
> > before shrinking the partition ?
> >
> > This error (I/O error) also looks undesirable to me.
> 
> I couldn't shrink the filesystem, because I couldn't mount it because
> of the bug. The filesystem was large and I was in desparate need of
> some spare diskspace. At first, I was going to completely get rid of
> it, but then I thought you might want to have a look at the
> superblock, or some othe block, or whatever else to analyze the bug.
> Since the bug was some sort of initialization issue, I finally decided
> to keep the first 500 MB of the filesystem and reclaimed the rest of
> it (by shrinking the partition).
> 
> And all that had happened *before* I posted the bug report on this mailing list.
> 
> Luckily, when I tried to mount the "broken" filesystem today, the
> nilfs driver exposed the very same oops again. I applied your
> patch/recompiled the kernel and the oops disappeared.
> 
> So, no. I didn't use any nilfs-resize. And those IO error are pretty
> much expected to me.

Understood, thank you for letting me know the situation.

Regards,
Ryusuke Konishi
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