From owner-freebsd-current@FreeBSD.ORG Sun Oct 25 02:29:48 2009 Return-Path: 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 9CD05106566B for ; Sun, 25 Oct 2009 02:29:48 +0000 (UTC) (envelope-from doug@polands.org) Received: from hrndva-omtalb.mail.rr.com (hrndva-omtalb.mail.rr.com [71.74.56.122]) by mx1.freebsd.org (Postfix) with ESMTP id 5E83B8FC0C for ; Sun, 25 Oct 2009 02:29:48 +0000 (UTC) Received: from haran.polands.org ([75.87.219.217]) by hrndva-omta02.mail.rr.com with ESMTP id <20091025021016351.LBCR1670@hrndva-omta02.mail.rr.com> for ; Sun, 25 Oct 2009 02:10:16 +0000 Received: from email.polands.org (ammon.polands.org [172.16.1.7]) by haran.polands.org (8.14.3/8.14.3) with ESMTP id n9P2AFbd067846 for ; Sat, 24 Oct 2009 21:10:15 -0500 (CDT) (envelope-from doug@polands.org) Received: from 172.16.1.37 (SquirrelMail authenticated user djp) by email.polands.org with HTTP; Sat, 24 Oct 2009 21:10:15 -0500 Message-ID: <46e678eb1eeca98033b15979e034a765.squirrel@email.polands.org> Date: Sat, 24 Oct 2009 21:10:15 -0500 From: "Doug Poland" To: freebsd-current@freebsd.org User-Agent: SquirrelMail/1.4.20-RC2 MIME-Version: 1.0 Content-Type: text/plain;charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Priority: 3 (Normal) Importance: Normal Subject: Fatal trap 12 on ZFS in 8.0-RC1 X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 25 Oct 2009 02:29:48 -0000 Hello, I'm experimenting with ZFS on 8-0-RC1 (amd64) in a VMWare virtual machine w/2GB RAM. In installed ZFS on GPT root using the excellent instructions at http://wiki.freebsd.org/RootOnZFS/GPTZFSBoot/RAIDZ1. All was well until I tried some benchmarking with benchmarks/unixbench. I kept getting kmem_map too small panics on the filesystem tests so starting playing with vm.kmem_size. I finally got unixbench through the first 6 Filesystem Throughput tests with: vm.kmem_size="1296M" vm.kmem_size_max="1296M" vfs.zfs.arc_max="128M" vfs.zfs.vdev.cache.size="24M" (i think) Unfortunately, ZFS paniced with: Fatal trap 12: page fault while in kernel mode. Now, when I attempt to restart the VM, as soon as the "boot menu" is gone, I immediately get the same Fatal trap 12 panics again and cannot get past this point. I've got the 8.0-RC1 DVD and can run Fixit, but have no idea how to repair this broken ZFS installation. Suggestions welcome. -- Regards, Doug