Re: Possible bug in krbd (4.4.0)

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It is XFS.

nothing interesting in dmesg

rbd showmapped + trimmed sysrq (-t -w)
http://pastebin.com/s68Sqia4


On Mon, Feb 6, 2017 at 10:40 AM, Ilya Dryomov <idryomov@xxxxxxxxx> wrote:
> On Mon, Feb 6, 2017 at 7:26 PM, Max Yehorov <myehorov@xxxxxxxxxx> wrote:
>>> For hours?  Does it succeed after X number of hours?
>> Still mounted from Feb 6. There is an attempt to unmount every 10 minutes.
>>
>>> This doesn't say that /dev/rbd0 is in use by pid 5926.  It says that
>>> there is a process with the name "dio/rbd0", that's all.
>>>
>>> I'm guessing you ran plain "lsof" with no arguments here.  Were there
>>> other */rbd0 matches, like jbd2/rbd0?
>>
>> The entire output
>>
>> :~# lsof | grep rbd
>>
>> dio/rbd0   5926             root  cwd       DIR                8,5
>>     4096          2 /
>> dio/rbd0   5926             root  rtd       DIR                8,5
>>     4096          2 /
>> dio/rbd0   5926             root  txt   unknown
>>                     /proc/5926/exe
>> rbd        5996             root  cwd       DIR                8,5
>>     4096          2 /
>> rbd        5996             root  rtd       DIR                8,5
>>     4096          2 /
>> rbd        5996             root  txt   unknown
>>                     /proc/5996/exe
>
> Is this xfs or ext4?
>
> What is the output of "rbd showmapped"?
>
> Is there anything in dmesg?  Can you provide a snippet?
>
> Can you provide the output I requested in my first reply?
>
> $ cat /sys/kernel/debug/ceph/<fsid>/osdc
> $ echo w >/proc/sysrq-trigger
> $ echo t >/proc/sysrq-trigger
>
> Thanks,
>
>                 Ilya
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