From owner-freebsd-stable@FreeBSD.ORG Sun Aug 31 22:17:40 2008 Return-Path: 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 C5D361065694 for ; Sun, 31 Aug 2008 22:17:40 +0000 (UTC) (envelope-from yds@CoolRat.org) Received: from orion.dppl.com (orion.dppl.net [216.182.10.231]) by mx1.freebsd.org (Postfix) with ESMTP id 9FEFF8FC14 for ; Sun, 31 Aug 2008 22:17:40 +0000 (UTC) (envelope-from yds@CoolRat.org) Received: from sushi.coolrat.org (c-68-44-170-116.hsd1.nj.comcast.net [68.44.170.116]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by orion.dppl.com (Postfix) with ESMTPSA id B25316432C23 for ; Sun, 31 Aug 2008 17:59:33 -0400 (EDT) Message-ID: <48BB1445.90804@CoolRat.org> Date: Sun, 31 Aug 2008 17:59:33 -0400 From: Yarema User-Agent: Thunderbird 2.0.0.16 (Macintosh/20080707) MIME-Version: 1.0 To: stable@freebsd.org References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: 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 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 31 Aug 2008 22:17:40 -0000 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. Same here. Running root on ZFS. Yesterday I hosed my system and recovered by booting FreeSBIE, downloading the latest amd64-bootonly.iso copying /boot/kernel/*, tweaking loader.conf for the GENERIC kernel and I was back in business. First thing was to csup again, add STACK to my custom kernel (which is much like generic with all the drivers unrelated to my hardware removed) and build/install world. All looked good except running "systat -vmstat 1" shows Sys using 100% of CPU after a few minutes. I'm not even sure if it's related to anything specific running on the box or not. Just gets progressively more sluggish within minutes of booting and all the cycles seem to be spinning in the Sys category with almost nothing left for userland or anything else. The network stack seems to be routing traffic well enough though. I can still stream music and video and send emails such as this one routed via the box in question. But otherwise just about any load seems to send %Sys into the stratosphere. -- Yarema http://yds.CoolRat.org/zfsboot.shtml