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Date:      Wed, 27 Apr 2005 20:42:03 +0200
From:      Marc Olzheim <marcolz@stack.nl>
To:        Brian Fundakowski Feldman <green@freebsd.org>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: NFS client/buffer cache deadlock
Message-ID:  <20050427184203.GD6256@stack.nl>
In-Reply-To: <20050427183435.GA39270@green.homeunix.org>
References:  <20050426151751.GB68038@stack.nl> <20050426155043.GC5789@green.homeunix.org> <20050426160609.GA68511@stack.nl> <20050426162549.GD5789@green.homeunix.org> <20050426164346.GA68763@stack.nl> <20050426193602.GE5789@green.homeunix.org> <20050427081746.GA66441@stack.nl> <20050427160857.GF5789@green.homeunix.org> <20050427171523.GB5984@stack.nl> <20050427183435.GA39270@green.homeunix.org>

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On Wed, Apr 27, 2005 at 02:34:35PM -0400, Brian Fundakowski Feldman wrote:
> Alright, thanks for helping with this :-) Do you think you can find
> a way to tell if in 4.x you're actually using NFSv3/transactions?  I
> would really like to know why 4.x isn't deadlocking, and that's the
> most plausible explanation I can think of right now.
>=20
> The behavior could also be totally different due to nfsiod, lack thereof,
> or its settings.  Are you running nfsiod on 4.x, and if so, how many?
> On 5.x+ the default maximum of nfsiods is 20.

The install I ran the speedtest on is:

FreeBSD baroque.ilse.net 4.10-STABLE FreeBSD 4.10-STABLE #23: Wed Aug  4 15=
:18:52 CEST 2004     root@tango.ilse.net:/usr/obj/usr/src/sys/BAROQUE i386

and runs 6 nfsiods.

How can I tell whether it uses transactions ?

The NFS server is mounted with:

mount_nfs -c -P -a 0 -r 8192 -w 8192 -i -o rw,noatime,nointr host:/path /nf=
s/host/path

Marc

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