From owner-freebsd-stable@FreeBSD.ORG Sun Oct 3 18:36:16 2010 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id AD9CB106564A for ; Sun, 3 Oct 2010 18:36:16 +0000 (UTC) (envelope-from alan.l.cox@gmail.com) Received: from mail-iw0-f182.google.com (mail-iw0-f182.google.com [209.85.214.182]) by mx1.freebsd.org (Postfix) with ESMTP id 678FC8FC17 for ; Sun, 3 Oct 2010 18:36:16 +0000 (UTC) Received: by iwn10 with SMTP id 10so1328447iwn.13 for ; Sun, 03 Oct 2010 11:36:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:reply-to :in-reply-to:references:date:message-id:subject:from:to:cc :content-type; bh=NifQFghR9PnGPPeHKxbb09eX+VlqpzBXHVkW7NCWhyk=; b=dVLKz07SpXr1yhYYqIemVT/jJvexL/OKlT8QNLjuG85PVlYGd6TnsfB8r36HE44H3i jXKygVelDAXveGjpxI5ArYeYyrFkIzTPE46D7nmnbwRsZAGy/ZqEZXnf4QiOBzbpRuy+ S9Ixn4FSBR7EFHQ1qMRooq29oKcMm80aFiYnk= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:reply-to:in-reply-to:references:date:message-id :subject:from:to:cc:content-type; b=qKj9lck/pDPhn2YtU1Q+EdvhYPPylXiTQ8XU0WMQCFbHrWClkgHxeUcnutWPjXWanF /4rR+BRBielWrE5mmXI0/Lsv59HJvxUTf2zZRXwa5s0fR4+QoOdk24GljoLBrlyX0bnp StuSjJUFw76OP2Zv4tRNGa3Std3dMW+p8YkII= MIME-Version: 1.0 Received: by 10.42.5.140 with SMTP id 12mr10139005icw.28.1286129568143; Sun, 03 Oct 2010 11:12:48 -0700 (PDT) Received: by 10.42.170.136 with HTTP; Sun, 3 Oct 2010 11:12:48 -0700 (PDT) In-Reply-To: <201010030211.o932Bd4C048116@hugeraid.jetcafe.org> References: <201010030211.o932Bd4C048116@hugeraid.jetcafe.org> Date: Sun, 3 Oct 2010 13:12:48 -0500 Message-ID: From: Alan Cox To: Dave Hayes Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: freebsd-stable Subject: Re: Panic: attempted pmap_enter on 2MB page X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: alc@freebsd.org List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 03 Oct 2010 18:36:16 -0000 On Sat, Oct 2, 2010 at 9:11 PM, Dave Hayes wrote: > What does the above mentioned panic mean? I'm booting from > an mfsroot off of a DVD with a loader.conf like this: > > autoboot_delay="5" > mfsroot_load="YES" > mfsroot_type="mfs_root" > mfsroot_name="/mfsboot" > vfs.root.mountfrom="ufs:md0" > vfs.root.mountfrom.options="rw" > kern.ipc.nmbclusters=32768 > net.inet.tcp.tcbhashsize=16384 > vm.pmap.pg_ps_enabled=1 > vm.kmem_size="2G" > accf_http_load="YES" > net.inet.tcp.syncache.hashsize=1024 > net.inet.tcp.syncache.bucketlimit=100 > > This is FreeBSD 8.1-RELEASE amd64 running with the debugger installed > into the kernel. Thanks in advance for any insight provided. :) > I'm afraid that I can't offer much insight without a stack trace. At initialization time, we map the kernel with 2MB pages. I suspect that something within the kernel is later trying to change one those mappings. If I had to guess, it's related to the mfs root. Regards, Alan