[Linux-cluster] Lockingstatistics

[Robert Peterson]

David Teigland wrote:
> On Tue, Jan 16, 2007 at 10:32:32AM +0100, Marc Grimme wrote:
>   
>> Hello,
>> is there a way to get a status on which node has which files locked and in 
>> what state?
>> Background:
>> We sometimes see processes ending up in deadlocks. And it is always very 
>> difficult to see which lock causes the problem. It would be very helpfull to 
>> get a dump on all the locks held by a given node in reference to the locked 
>> file.
>>     
> In RHEL4 you can dump locks from gfs or the dlm:
> gfs_tool lockdump <mountpoint>
> echo "lockspace name" >> /proc/cluster/dlm_locks
> cat /proc/cluster/dlm_locks
>
> The number in type 2 locks is the inode number.
>
> Dave
>   
Hey, Marc.  Funny you should ask; I just added those to the FAQ on 
Monday.  See:

http://sourceware.redhat.com/cluster/faq.html#lock_dump_gfs

and

http://sourceware.redhat.com/cluster/faq.html#lock_dump_dlm

Regards,

Bob Peterson
Red Hat Cluster Suite