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Date: Sat, 19 Aug 2006 16:15:19 -0400
From: Kris Kennaway <kris@obsecurity.org>
To: Geoffroy Desvernay <dgeo@egim-mrs.fr>
Message-ID: <20060819201519.GD36605@xor.obsecurity.org>
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Cc: freebsd-bugs@FreeBSD.org
Subject: Re: kern/97686: [nfs] massive NFS server performance break under
	"options QUOTA"
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On Mon, Jul 31, 2006 at 05:00:41PM +0000, Geoffroy Desvernay wrote:

>  We now have a stable machine without QUOTA *and* INET6.
>  (only without QUOTA the machine died 24hours later). We left rpc.lockd
>  running.
> =20
>  Here is a simple zsh script to make it crash when with QUOTA-enabled
>  kernel (use $(seq 1 50) or ? with another shell). launch it on a client
>  and see 'top' on the server... I'm not kernel (nor nfs) hacker, but I
>  may try some patches if it can help.
> =20
>  mount options:
>  /dev/da0s1g on /u (ufs, NFS exported, local, with quotas, soft-updates,
>  acls, fsid e0bf4c447f5cf8a5)
> =20
>  ---------------- crashlocks.zsh
>  #!/usr/local/bin/zsh -x
>  for i in {1..50} ; do
>    lockfile truc$i &
>  done
>  ----------------
> =20
>  Hope this can help...

Please provide the details of the panic, per the chapter on kernel
debugging in the developers handbook.

If it's not panicking but deadlocking, update to 6.1-STABLE where this
bug is believed to be fixed.

Thanks,
Kris

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