From owner-freebsd-questions  Tue Apr 28 03:11:09 1998
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To: scanner@apricot.com
cc: questions@FreeBSD.ORG
Subject: Re: lockups on machine with NFS writes to itself.. 
In-reply-to: Your message of "Mon, 27 Apr 1998 23:08:15 PDT."
             <199804280608.XAA04139@ryoohki.apricot.com> 
From: David Greenman <dg@root.com>
Reply-To: dg@root.com
Date: Tue, 28 Apr 1998 03:11:05 -0700
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>
>> >Apr 27 12:49:19 kamidake /kernel: Out of mbuf clusters - increase maxusers!
>
>>    In your case, maxusers probably isn't the best solution. Instead, add
>> this to your kernel config file:
>> 
>> options "NMBCLUSTERS=2000"
>
>Hm, after doing this and trying my test case (make an ISO image
>via mkisofs that will result in a 608mb image file) it still locks up.
>(there is a brief period of disk activity.)  The out of mbufs message
>will not appear for a while yet.
>
>It is curious that this seems to only happen with NFS partitions
>mounted on the same machine. Although the machine is locked up
>(all my prompts have stopped responding) it still responds to
>pings with no delay at all.

   Ah, I missed this last part in your original message. I think you're
experiancing one of the bugs in the NFS code - I recall seeing this
when mounting client/server on the same machine and using NQNFS. If it
only happens when you mount the server on itself, then I'd recommend
not doing that. :-)

-DG

David Greenman
Co-founder/Principal Architect, The FreeBSD Project

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