Re: Debian/Jessie 3.16.7-ckt2-1 kernel error

[Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>]

Hi Petr,

On 2014/12/28 0:36, Petr Janecek wrote:
> Hello Satoru and all,
>
>    that Oct. report was the only time I've experienced the error, so I
> don't have much to add. I can try to answer your questions:
>
>>> Here are my questions.
>>>
>>> 1. Is your system "btrfs scrub" clean?
>
>    yes,
>
>>> 2. Is this message shown every boot time?
>
>    no, I have seen them only during one boot
>
>>> 3. Is this message shown only in boot?
>
>    As in my Oct. email
> http://permalink.gmane.org/gmane.comp.file-systems.btrfs/39721
> I've seen a similar one after creating a subvolume on a new fs.
> But it was during the same boot.
>
>>> 4. When this message is started to be shown?
>>> 5. Do you have any trouble, change your operation or configuration
>>>     just before the answer of Q4 ?
>
>    a disk was added to the fs and balance has been run. The balance
> crashed, as in https://bugzilla.kernel.org/show_bug.cgi?id=64961
> (probably unrelated).  After reboot, I've seen the messages.
>
>> Additional questions.
>> Q5. Could you give me your kernel configuration?
>>      At least, could you tell me whether your kernel
>>      enabled CONFIG_PREEMPT or not?
>
>    CONFIG_PREEMPT_VOLUNTARY=y
>
>> Q6. If the answer of Q1 is correct, please give me the
>>      file system image which can be captured by the following command.
>
>    Sorry, the fs's are long gone. I continued to run similar workloads on
> that test box, but these errors never appeared again.

Thank you for giving me information.

So, further investigation of this problem seems to be hard.
Please give us the above-mentioned information if this problem
happens again.

Thanks,
Satoru

>
>
> Regards,
>
> Petr
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