From owner-freebsd-stable@FreeBSD.ORG Tue Jul 20 17:18:40 2010 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 AEDBB1065670 for ; Tue, 20 Jul 2010 17:18:40 +0000 (UTC) (envelope-from alan.l.cox@gmail.com) Received: from mail-gw0-f54.google.com (mail-gw0-f54.google.com [74.125.83.54]) by mx1.freebsd.org (Postfix) with ESMTP id 638798FC12 for ; Tue, 20 Jul 2010 17:18:39 +0000 (UTC) Received: by gwb19 with SMTP id 19so3022820gwb.13 for ; Tue, 20 Jul 2010 10:18:39 -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=/tWuNaDaqCu58ZHEuEF+9iSpzEgIqSNYAxapHMyGzMQ=; b=mEmYI9PsP9w481YgIjuLpDGzvyHkK9vVR+MPInlf7LPlmOQHgrcTmMwnIcz66eiuHG 7bMB+LWdYcAR0itvMMB2s0zBTrcDGVtnsvwBAqhcv9B9h9aYnZxQGz4DjKlLFWN+aWNI KzvgddBvTesP1BZquZhLxgJcgKA4hZTAf3cIo= 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=lmWs0iLxZ20HC1lyZKTM/TenTkSvyoMCObbtbbC8Ea0HqthppWNmX1zY0e2HWS2JL0 m2Wmbqg9UwYMELzZ6ZcZ6/YfG86QtB4hae+OkIWdwTG9F/XfAiFgk6OPjG6QQTKmqbW7 NPV52ahoTn4gYS6pbzsypsw6LLoCWhUllbFdo= MIME-Version: 1.0 Received: by 10.224.106.160 with SMTP id x32mr5747296qao.130.1279644475047; Tue, 20 Jul 2010 09:47:55 -0700 (PDT) Received: by 10.229.239.5 with HTTP; Tue, 20 Jul 2010 09:47:54 -0700 (PDT) In-Reply-To: <4C4528A8.5040605@aldan.algebra.com> References: <4C4528A8.5040605@aldan.algebra.com> Date: Tue, 20 Jul 2010 11:47:54 -0500 Message-ID: From: Alan Cox To: "Mikhail T." Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: stable@freebsd.org Subject: Re: today's 8.1/i386: panic: bad pte 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: Tue, 20 Jul 2010 17:18:40 -0000 On Mon, Jul 19, 2010 at 11:40 PM, Mikhail T. > wrote: > Some part of KDE4's kdm crashed at start-up and seems to have taken the > entire machine with it: > > kgdb /boot/kernel/kernel /var/crash/vmcore.22 > GNU gdb 6.1.1 [FreeBSD] > Copyright 2004 Free Software Foundation, Inc. > GDB is free software, covered by the GNU General Public License, and > you are > welcome to change it and/or distribute copies of it under certain > conditions. > Type "show copying" to see the conditions. > There is absolutely no warranty for GDB. Type "show warranty" for > details. > This GDB was configured as "i386-marcel-freebsd"... > > Unread portion of the kernel message buffer: > <6>pid 18398 (drkonqi), uid 0: exited on signal 11 (core dumped) > TPTE at 0xbfca9488 IS ZERO @ VA 2a522000 > panic: bad pte > Uptime: 2h28m24s > Physical memory: 1263 MB > Dumping 195 MB: 180 164 148 132 116 100 84 68 52 36 20 4 > > Reading symbols from /boot/kernel/splash_pcx.ko...Reading symbols > from /boot/kernel/splash_pcx.ko.symbols...done. > done. > Loaded symbols for /boot/kernel/splash_pcx.ko > Reading symbols from /boot/kernel/vesa.ko...Reading symbols from > /boot/kernel/vesa.ko.symbols...done. > done. > Loaded symbols for /boot/kernel/vesa.ko > Reading symbols from /boot/modules/nvidia.ko...done. > Loaded symbols for /boot/modules/nvidia.ko > Reading symbols from /boot/kernel/linux.ko...Reading symbols from > /boot/kernel/linux.ko.symbols...done. > done. > Loaded symbols for /boot/kernel/linux.ko > Reading symbols from /boot/kernel/acpi.ko...Reading symbols from > /boot/kernel/acpi.ko.symbols...done. > done. > Loaded symbols for /boot/kernel/acpi.ko > Reading symbols from /boot/kernel/linprocfs.ko...Reading symbols > from /boot/kernel/linprocfs.ko.symbols...done. > done. > Loaded symbols for /boot/kernel/linprocfs.ko > #0 doadump () at pcpu.h:231 > 231 __asm __volatile("movl %%fs:0,%0" : "=r" (td)); > (kgdb) bt full > #0 doadump () at pcpu.h:231 > No locals. > #1 0xc05d10a4 in boot (howto=260) at > /usr/src/sys/kern/kern_shutdown.c:416 > _giantcnt = Variable "_giantcnt" is not available. > (kgdb) where > #0 doadump () at pcpu.h:231 > #1 0xc05d10a4 in boot (howto=260) at > /usr/src/sys/kern/kern_shutdown.c:416 > #2 0xc05d12b1 in panic (fmt=Variable "fmt" is not available. > ) at /usr/src/sys/kern/kern_shutdown.c:590 > #3 0xc07f0406 in pmap_remove_pages (pmap=0xc85bbc78) at > /usr/src/sys/i386/i386/pmap.c:4198 > #4 0xc079516b in vmspace_exit (td=0xc51f3a00) at > /usr/src/sys/vm/vm_map.c:409 > #5 0xc05a7253 in exit1 (td=0xc51f3a00, rv=139) at > /usr/src/sys/kern/kern_exit.c:303 > #6 0xc05d3296 in sigexit (td=0xc51f3a00, sig=139) at > /usr/src/sys/kern/kern_sig.c:2872 > #7 0xc05d47a8 in postsig (sig=11) at /usr/src/sys/kern/kern_sig.c:2759 > #8 0xc06082f8 in ast (framep=0xe5fafd38) at > /usr/src/sys/kern/subr_trap.c:234 > #9 0xc07e2c44 in doreti_ast () at > /usr/src/sys/i386/i386/exception.s:368 > > Does this look familiar to anyone? Thanks! > > Historically, this panic has indicated flakey memory. This panic occurs because a memory location within a page table has unexpectedly changed to zero. Alan