[Ocfs2-users] Weird lock

[Sunil Mushran]

Are any processes spinning during this time?
As in, does top show any process eating up cpu.

The said hangs are in the generic layer and could be due to a
spinning process not releasing a lock. I can see some processes
in R state but can't say for sure that they are spinning or not.

ocfs2/kernel versions?

Sunil

Nuno Fernandes wrote:
> Hello,
>
> The sysrq is attached.
>
> The processlist is:
>
> ...
> 17280 ?        D      0:00  |   
> \_ /usr/bin/perl -w /storage/webhosting/site/public_html/alojados/site/MT/come2x.cgi
>  6373 ?        S      0:00  \_ /usr/sbin/httpd
> 16561 ?        D      0:00  |   
> \_ /usr/bin/perl -w /storage/webhosting/site/public_html/alojados/site/MT/come2x.cgi
>  6380 ?        S      0:00  \_ /usr/sbin/httpd
> 17093 ?        D      0:00  |   
> \_ /usr/bin/perl -w /storage/webhosting/site/public_html/alojados/site/MT/come2x.cgi
>  7649 ?        S      0:00  \_ /usr/sbin/httpd
> 16566 ?        D      0:00  |   
> \_ /usr/bin/perl -w /storage/webhosting/site/public_html/alojados/site/MT/come2x.cgi
>  7772 ?        S      0:00  \_ /usr/sbin/httpd
> 17829 ?        D      0:00  |   
> \_ /usr/bin/perl -w /storage/webhosting/site/public_html/alojados/site/MT/come2x.cgi
>  7905 ?        S      0:00  \_ /usr/sbin/httpd
> 17233 ?        D      0:00  |   
> \_ /usr/bin/perl -w /storage/webhosting/site/public_html/alojados/site/MT/come2x.cgi
>  7924 ?        S      0:00  \_ /usr/sbin/httpd
> 16477 ?        R    343:20  |   
> \_ /usr/bin/perl -w /storage/webhosting/site/public_html/alojados/site/MT/come2x.cgi
>  7986 ?        S      0:00  \_ /usr/sbin/httpd
> 16565 ?        D      0:00  |   
> \_ /usr/bin/perl -w /storage/webhosting/site/public_html/alojados/site/MT/come2x.cgi
>  8007 ?        S      0:00  \_ /usr/sbin/httpd
> 30015 ?        D      0:00  |   
> \_ /usr/bin/perl -w /storage/webhosting/site/public_html/alojados/site/MT/come2x.cgi
>  8066 ?        S      0:00  \_ /usr/sbin/httpd
> 17236 ?        D      0:00  |   
> \_ /usr/bin/perl -w /storage/webhosting/site/public_html/alojados/site/MT/come2x.cgi
>  8070 ?        S      0:00  \_ /usr/sbin/httpd
> 16480 ?        D      0:00  |   
> \_ /usr/bin/perl -w /storage/webhosting/site/public_html/alojados/site/MT/come2x.cgi
> ...
>
> Thanks for any info,
> Best regards,
> Nuno Fernandes
>
> On Friday 04 April 2008 19:21:05 Sunil Mushran wrote:
>   
>> No busy locks. The hang is not because of o2dlm.
>>
>> Do a kernel stack dump. echo t >/proc/sysrq-trigger
>> That should tell us where the process is stuck in the kernel.
>>
>> Nuno Fernandes wrote:
>>     
>>> On Friday 04 April 2008 18:40:42 Sunil Mushran wrote:
>>>       
>>>> debugfs.ocfs2 -R "fs_locks" /dev/sdX >/tmp/out
>>>>         
>>> Hi,
>>>
>>> I happened again. Attached i send the output.
>>>
>>> Thanks for any info,
>>> Best regards,
>>> Nuno Fernandes
>>>
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>>>
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>
>
>   
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