Re: Cannot delete lvm thin volume

[Heinz Mauelshagen <heinzm@redhat.com>]

fuser and lsof can only report open files of active processes.

You should check the following as well:

grep c13537_2k /proc/{mounts,swaps}
dmsetup table|grep 252:6
losetup -a | grep dm-6

Heinz

On 10/19/2015 05:16 PM, Nikolay Borisov wrote:
>
> On 10/19/2015 05:51 PM, Heinz Mauelshagen wrote:
>> Nikolay,
>>
>> this is a question for linux-lvm.
> Right, will know from now on .
>
>> You're saying the fs is not mounted but the lv is open as of
>> your lvdisplay output, thus you can't lvremove it.
> How can I see which is the actual user of it? As I stated previously
> fuser and lsof didn't show anything relevant. Is there some additional
> tools from the lvm suite that I can see to obtain such information?
>
>>
>> Heinz
>>
>>
>> On 10/16/2015 02:24 PM, Nikolay Borisov wrote:
>>> Hello I have the following thin volume, which I'd like to delete:
>>>
>>> lvdisplay -v /dev/coregroup/c13537_2k
>>>       Using logical volume(s) on command line.
>>>     --- Logical volume ---
>>>     LV Path                /dev/coregroup/c13537_2k
>>>     LV Name                c13537_2k
>>>     VG Name                coregroup
>>>     LV UUID                LBPr0i-uac8-i3Co-5B3M-A6Bv-q8iv-kSRLRr
>>>     LV Write Access        read/write
>>>     LV Creation host, time xxxxx.net, 2015-10-14 02:02:45 -0500
>>>     LV Pool name           corepool
>>>     LV Status              available
>>>     # open                 1
>>>     LV Size                1.80 TiB
>>>     Mapped size            42.11%
>>>     Current LE             471808
>>>     Segments               1
>>>     Allocation             inherit
>>>     Read ahead sectors     auto
>>>     - currently set to     256
>>>     Block device           252:6
>>>
>>> dmsetup info coregroup-c13537_2k
>>> Name:              coregroup-c13537_2k
>>> State:             ACTIVE
>>> Read Ahead:        256
>>> Tables present:    LIVE
>>> Open count:        1
>>> Event number:      1
>>> Major, minor:      252, 6
>>> Number of targets: 1
>>> UUID:
>>> LVM-M8PwSxzGcsZQTtdgzfixsr08ZAlNpAbALBPr0iuac8i3Co5B3MA6Bvq8ivkSRLRr
>>>
>>> dmsetup status
>>> coregroup-c13537_2k: 0 3865051136 thin 1627684864 3865042943
>>>
>>> The version of the software is:
>>> lvremove --version
>>>     LVM version:     2.02.118(2)-RHEL6 (2015-09-08)
>>>     Library version: 1.02.95-RHEL6 (2015-09-08)
>>>     Driver version:  4.26.0
>>>
>>> And the kernel is 3.12.47.
>>>
>>> When I run 'lvremove -f /dev/coregroup/c13537_2k' I get the following
>>> error: Logical volume coregroup/c13537_2k contains a filesystem in use.
>>> I also get the same error when I try to deactivate the volume.
>>>
>>> fuser doesn't report anything and the volume is not mounted anywhere. I
>>> have also acquired an ftrace trace from executing lvremove but there are
>>> multiple invocation of the dm_ioctl function and I'm not sure which one
>>> is the relevant. So if you tell me what information in particular you
>>> need I'd post it here.
>>>
>>> Regards,
>>> Nikolay
>>>
>>> -- 
>>> dm-devel mailing list
>>> dm-devel@redhat.com
>>> https://www.redhat.com/mailman/listinfo/dm-devel
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