NFS lockd/statd lock up network connection

Tom McLaughlin tmclaugh at
Sat May 2 21:12:43 UTC 2009

Ryan Stone wrote, On 04/20/2009 10:14 PM:
> Well, that does confirm that your system is running out of clusters.  
> Because you lose all network connectivity I'd suspect a leak, probably 
> in code exercised by lockd.  I'm afraid that I know absolutely nothing 
> about it so I can't offer any kind of solution.  Hopefully somebody who 
> does know something is paying attention.
> One thing you could try is setting the tunable kern.ipc.nmbclusters 
> higher than 25600 -- maybe 40000?  If it's a leak that won't help 
> anything but if your system just doesn't have enough clusters that will 
> fix it. 

Yup, upped the value to 40000 and it still runs out of mbuf clusters. 
Appears to be something lockd is triggering.  I'll check with dfr.


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