[Ocfs2-devel] [QUESTION] what's lockres P000000000000000000000000000000?

[Eric Ren]

Hi Junxiao,

On 11/30/2015 09:13 PM, Junxiao Bi wrote:
> Hi Eric,
>
> It’s orphan scan lock. For more lock type and format, please refer to fs/ocfs2/ocfs2_lockid.h
Great! Thanks~
Eric
> Thanks,
> Junxiao.
>> 在 2015年11月30日，下午7:35，Eric Ren <zren at suse.com> 写道：
>>
>> Hi all,
>>
>> I found there is an odd lockres P000000000000000000000000000000 for me, so I'm
>> curious about what this lockres stands for?
>>
>> 1. #dmesg
>> ...
>> [ 7657.554057] (ocfs2dc,4061,1):ocfs2_process_blocked_lock:3904 lockres
>> P000000000000000000000000000000 blocked
>> [ 7657.554059] (ocfs2dc,4061,1):ocfs2_prepare_downconvert:3248 lockres
>> P000000000000000000000000000000, level 5 => 0, blocking 5
>> [ 7657.554062] (ocfs2dc,4061,1):ocfs2_downconvert_lock:3266 lockres
>> P000000000000000000000000000000, level 5 => 0
>> [ 7657.554066] (ocfs2dc,4061,1):ocfs2_process_blocked_lock:3928 lockres
>> P000000000000000000000000000000, requeue = no.
>> [ 7657.554070] (dlm_astd,4062,1):ocfs2_locking_ast:1076 AST fired for
>> lockres M0000000000000000011a1800000000, action 3, unlock 0, level 5 =>
>> 0
>> [ 7657.554073] (dlm_astd,4062,1):ocfs2_locking_ast:1076 AST fired for
>> lockres P000000000000000000000000000000, action 3, unlock 0, level 5 =>
>> 0
>> ...
>>
>> 2. n1:/debug/dlm # echo "locate <P000000000000000000000000000000>" |
>> debugfs.ocfs2 /dev/sda2
>> debugfs.ocfs2 1.8.2
>> debugfs: usage: locate <inode#>
>> debugfs:
>>
>> 3. n1:/debug/dlm # echo "stat <P000000000000000000000000000000>" |
>> debugfs.ocfs2 /dev/sda2
>> debugfs.ocfs2 1.8.2
>> debugfs: stat: Directory entry not found
>> '<P000000000000000000000000000000>'
>> debugfs:
>>
>> 4. n1:/debug/dlm # echo "locate <M0000000000000000011a1800000000>" |
>> debugfs.ocfs2 /dev/sda2
>> debugfs.ocfs2 1.8.2
>> debugfs:        72216   /file
>> debugfs:
>>
>> I know "M" refter to Metadata, but what's "P" here refer to?
>> Any help will be appreciated!
>>
>> Thanks,
>> Eric
>>
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>