From owner-freebsd-current@FreeBSD.ORG  Sun Sep  9 01:51:29 2007
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 8561616A469;
	Sun,  9 Sep 2007 01:51:29 +0000 (UTC)
	(envelope-from kris@FreeBSD.org)
Received: from weak.local (hub.freebsd.org [IPv6:2001:4f8:fff6::36])
	by mx1.freebsd.org (Postfix) with ESMTP id 680D913C467;
	Sun,  9 Sep 2007 01:51:28 +0000 (UTC)
	(envelope-from kris@FreeBSD.org)
Message-ID: <46E3519E.3040001@FreeBSD.org>
Date: Sun, 09 Sep 2007 03:51:26 +0200
From: Kris Kennaway <kris@FreeBSD.org>
User-Agent: Thunderbird 2.0.0.6 (Macintosh/20070728)
MIME-Version: 1.0
To: Peter Schuller <peter.schuller@infidyne.com>
References: <855622.76488.qm@web36601.mail.mud.yahoo.com>
	<20070908215102.GA8291@hyperion.scode.org>
In-Reply-To: <20070908215102.GA8291@hyperion.scode.org>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Cc: Simun Mikecin <numisemis@yahoo.com>, freebsd-fs@freebsd.org,
	freebsd-current@freebsd.org
Subject: Re: Swapping on ZFS - stability issue
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>, 
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 09 Sep 2007 01:51:29 -0000

Peter Schuller wrote:
>> Try one of this (depends wheter you need encrypted swap or not):
>>
>> 1. create zvol with 4k blocksize instead of default 8k:
>>      zfs create -b 4k -V 4g tank/swap
>>      swapon /dev/zvol/tank/swap
> 
> Using a 4k blocksize did not seem to have an effect on the problem.
> 
> The test I am doing is with top in one virtual console and the test
> program on another. I keep refreshing top seeing memory use climb,
> until it starts hitting swap. After a few seconds, top hangs and the
> only indications of life are ping and the console.
> 

Please follow the directions in the developers handbook chapter on 
kernel debugging to obtain the relevant debugging information.

Kris