From owner-freebsd-stable@FreeBSD.ORG  Sun Aug 31 22:23:19 2008
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: stable@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 9E290106567B
	for <stable@freebsd.org>; Sun, 31 Aug 2008 22:23:19 +0000 (UTC)
	(envelope-from jb@what-creek.com)
Received: from what-creek.com (what-creek.com [66.111.37.70])
	by mx1.freebsd.org (Postfix) with ESMTP id 7AF618FC20
	for <stable@freebsd.org>; Sun, 31 Aug 2008 22:23:18 +0000 (UTC)
	(envelope-from jb@what-creek.com)
Received: by what-creek.com (Postfix, from userid 102)
	id 8BDED745C9; Sun, 31 Aug 2008 22:23:18 +0000 (GMT)
Date: Sun, 31 Aug 2008 22:23:18 +0000
From: John Birrell <jb@what-creek.com>
To: Wes Morgan <morganw@chemikals.org>
Message-ID: <20080831222318.GA55788@what-creek.com>
References: <alpine.BSF.1.10.0808310627390.45643@ibyngvyr.purzvxnyf.bet>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <alpine.BSF.1.10.0808310627390.45643@ibyngvyr.purzvxnyf.bet>
User-Agent: Mutt/1.4.2.3i
Cc: stable@freebsd.org
Subject: Re: Unresponsive after dtrace
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: Sun, 31 Aug 2008 22:23:19 -0000

On Sun, Aug 31, 2008 at 06:35:16AM -0500, Wes Morgan wrote:
> I know this has been reported already, but I want to give a "me too". 
> After installing a new world and kernel from the tree yesterday afternoon, 
> I let my system run all night. This morning everything was extremely 
> sluggish and unresponsive. According to top, which I thankfully left 
> running, processes were going in and out of "*kmem_" (obviously 
> truncated). CPU usage was 80+% system and load averages were around 5.4. 
> The only changes I made to my system besides upgrading were to include the 
> options KDB, DDB and STACK in my kernel for zfs functionality. 
> Unfortunately, I cannot try without those options since my root is zfs. 
> Booting a kernel from 8/20 works fine.

That's not good news. :-(

I think I'll have to look at a partial back out of the ZFS changes now.

--
John Birrell