From owner-freebsd-stable@FreeBSD.ORG  Tue Dec 18 15:22:20 2007
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: freebsd-stable@FreeBSD.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 607B416A420;
	Tue, 18 Dec 2007 15:22:19 +0000 (UTC)
	(envelope-from dg@dglawrence.com)
Received: from dglawrence.com (static-72-90-113-2.ptldor.fios.verizon.net
	[72.90.113.2])
	by mx1.freebsd.org (Postfix) with ESMTP id 25E2A13C4E8;
	Tue, 18 Dec 2007 15:22:19 +0000 (UTC)
	(envelope-from dg@dglawrence.com)
Received: from tnn.dglawrence.com (localhost [127.0.0.1])
	by dglawrence.com (8.14.1/8.14.1) with ESMTP id lBIFMI5p059376;
	Tue, 18 Dec 2007 07:22:18 -0800 (PST)
	(envelope-from dg@dglawrence.com)
Received: (from dg@localhost)
	by tnn.dglawrence.com (8.14.1/8.14.1/Submit) id lBIFMIUi059375;
	Tue, 18 Dec 2007 07:22:18 -0800 (PST)
	(envelope-from dg@dglawrence.com)
X-Authentication-Warning: tnn.dglawrence.com: dg set sender to
	dg@dglawrence.com using -f
Date: Tue, 18 Dec 2007 07:22:18 -0800
From: David G Lawrence <dg@dglawrence.com>
To: Bruce Evans <brde@optusnet.com.au>
Message-ID: <20071218152217.GU25053@tnn.dglawrence.com>
References: <D50B5BA8-5A80-4370-8F20-6B3A531C2E9B@eng.oar.net>
	<20071217102433.GQ25053@tnn.dglawrence.com>
	<089C1524-B8E0-4C70-B69A-ECBE0C8DFC90@eng.oar.net>
	<20071218144133.GT25053@tnn.dglawrence.com>
	<20071219020952.A34422@delplex.bde.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20071219020952.A34422@delplex.bde.org>
X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-3.0
	(dglawrence.com [127.0.0.1]); Tue, 18 Dec 2007 07:22:18 -0800 (PST)
Cc: freebsd-net@FreeBSD.org, freebsd-stable@FreeBSD.org
Subject: Re: Packet loss every 30.999 seconds
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, 
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 18 Dec 2007 15:22:20 -0000

> On Tue, 18 Dec 2007, David G Lawrence wrote:
> 
> >>Thanks.  Have a kernel building now.  It takes about a day of uptime
> >>after reboot before I'll see the problem.
> >
> >  You may also wish to try to get the problem to occur sooner after boot
> >on a non-patched system by doing a "tar cf /dev/null /" (note: substitute
> >/dev/zero instead of /dev/null, if you use GNU tar, to disable its
> >"optimization"). You can stop it after it has gone through a 100K files.
> >Verify by looking at "sysctl vfs.numvnodes".
> 
> Hmm, I said to use "find /", but that is not so good since it only
> looks at directories and directories (and their inodes) are not packed
> as tightly as files (and their inodes).  Optimized tar, or "find /
> -type f", or "ls -lR /", should work best, by doing not much more than
> stat()ing lots of files, while full tar wastes time reading file data.

   I have no reason to believe that just reading directories will
reproduce the problem with file vnodes. You need to open the files
and read them. Nothing else will do.

-DG

David G. Lawrence
President
Download Technologies, Inc. - http://www.downloadtech.com - (866) 399 8500
The FreeBSD Project - http://www.freebsd.org
Pave the road of life with opportunities.