From owner-freebsd-current@FreeBSD.ORG  Thu Oct 13 14:39:46 2011
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: current@FreeBSD.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id BC83E1065678;
	Thu, 13 Oct 2011 14:39:46 +0000 (UTC)
	(envelope-from phk@phk.freebsd.dk)
Received: from phk.freebsd.dk (phk.freebsd.dk [130.225.244.222])
	by mx1.freebsd.org (Postfix) with ESMTP id 7B4478FC19;
	Thu, 13 Oct 2011 14:39:46 +0000 (UTC)
Received: from critter.freebsd.dk (critter-phk.freebsd.dk [192.168.48.2])
	by phk.freebsd.dk (Postfix) with ESMTP id E4B745DC4;
	Thu, 13 Oct 2011 14:39:44 +0000 (UTC)
Received: from critter.freebsd.dk (localhost [127.0.0.1])
	by critter.freebsd.dk (8.14.5/8.14.5) with ESMTP id p9DEdiqV002803;
	Thu, 13 Oct 2011 14:39:44 GMT (envelope-from phk@phk.freebsd.dk)
To: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no>
From: "Poul-Henning Kamp" <phk@phk.freebsd.dk>
In-Reply-To: Your message of "Thu, 13 Oct 2011 16:13:00 +0200."
	<86lisp9dzn.fsf@ds4.des.no>
Content-Type: text/plain; charset=ISO-8859-1
Date: Thu, 13 Oct 2011 14:39:44 +0000
Message-ID: <2802.1318516784@critter.freebsd.dk>
Cc: Alexander Motin <mav@FreeBSD.org>, current@FreeBSD.org
Subject: Re: 9 hangs with idletick = 0
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: Thu, 13 Oct 2011 14:39:46 -0000

In message <86lisp9dzn.fsf@ds4.des.no>, =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= wr
ites:
>"Poul-Henning Kamp" <phk@phk.freebsd.dk> writes:
>> For what it's worth, I regularly (=3Devery 10-12 days or so) see all
>> timer activity in the system die and have to use the 4-sec
>> power-switch to get the system down.
>
>Could you check if network activity (e.g. downloading an ISO) triggers
>it, and if so, if it goes away when you set the kern.eventtimer.idletick
>sysctl to 0?

I have never seen any correlation, mostly because I usually don't
notice it right away, but only when something like top(1) doesn't
update and similar.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.