Re: Nilfs2 crash debugging

[Anton Eliasson <devel-17Olwe7vw2dLC78zk6coLg@public.gmane.org>]

Vyacheslav Dubeyko skrev 2013-08-26 11:56:
> On Sun, 2013-08-25 at 17:02 +0200, Anton Eliasson wrote:
>
> [snip]
>> Yes. Here's another huge kernel.log for you [2]. It's 19 MB compressed
>> and 282 MB uncompressed. I blanked the log while running the stock
>> kernel and then rebooted to the custom debugging kernel. X wouldn't
>> start so I just logged in to a virtual terminal, changed directory to
>> "~/Bilder/20130321-28 Jakobs bilder från Nederländerna" and then
>> executed `cat 179.JPG >/dev/null`.
>>
>> This caused a read-only remount and a bunch of "broken bmap" messages to
>> show, followed by an "Input/Output error". I saved a copy of
>> /var/log/kernel.log as soon as I could after that, before reinstalling
>> the stock kernel and rebooting.
>>
>> [1]: http://antoneliasson.se/publicdump/config.x86_64.last.20130825
>> [2]: http://antoneliasson.se/publicdump/kernel.log.20130825.gz
>>
> Yes, it's great. Thank you. Now I can investigate the issue's
> environment. I suspect that this issue is related to the issue with
> "unable to handle kernel paging request" in nilfs_end_page_io(). But,
> maybe, I am wrong. Anyway, it is a good basis for more detailed
> understanding of the issue.
>
> Thanks,
> Vyacheslav Dubeyko.
>
>
You're welcome. And thank you for your thorough instructions. It's been 
very informative and worthwhile for me to patch and build a kernel with 
custom options. Let me know if you need more experiments run on the 
damaged filesystem. Otherwise I'll delete the stored disk images in a 
month or two.

-- 
Best Regards,
Anton Eliasson

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