From owner-freebsd-current Wed Apr 17 20:35:22 2002 Delivered-To: freebsd-current@freebsd.org Received: from fledge.watson.org (fledge.watson.org [204.156.12.50]) by hub.freebsd.org (Postfix) with ESMTP id 47E3737B400 for ; Wed, 17 Apr 2002 20:35:14 -0700 (PDT) Received: from fledge.watson.org (fledge.pr.watson.org [192.0.2.3]) by fledge.watson.org (8.11.6/8.11.6) with SMTP id g3I3Z5w37362 for ; Wed, 17 Apr 2002 23:35:05 -0400 (EDT) (envelope-from robert@fledge.watson.org) Date: Wed, 17 Apr 2002 23:35:05 -0400 (EDT) From: Robert Watson X-Sender: robert@fledge.watson.org To: current@FreeBSD.org Subject: WITNESS_DDB (was: Re: Fatal trap 9: general protection fault while in kernel mode) In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Ah, a useful data point I forgot: the kernel has WITNESS_DDB compiled in, so it is related: Witness attempted to enter the debugger, and failed spectacularly. Robert N M Watson FreeBSD Core Team, TrustedBSD Project robert@fledge.watson.org NAI Labs, Safeport Network Services On Wed, 17 Apr 2002, Robert Watson wrote: > > Same configuration as before: > > netbooted dual processor box, local /usr/obj, swap, and nfs-mounted > everything else. World build -j 8. > > crash1# make -j 8 buildworld >& /tmp/build.out > lock order reversal > 1st 0xc8e9c984 DIRHASH (UMA zone) @ ../../../vm/uma_core.c:533 > 2nd 0xc082aa94 PCPU KMAP ENTRY (UMA cpu) @ ../../../vm/uma_core.c:1301 > Debugger("witness_lock") > kernel trap 9 with interrupts disabled > > > Fatal trap 9: general protection fault while in kernel mode > cpuid = 0; lapic.id = 00000000 > instruction pointer = 0x8:0xc0385dee > stack pointer = 0x10:0xc9e59d40 > frame pointer = 0x10:0xc9e59d78 > code segment = base 0x0, limit 0xfffff, type 0x1b > = DPL 0, pres 1, def32 1, gran 1 > processor eflags = resume, IOPL = 0 > current process = 10305 (cc1) > kernel: type 9 trap, code=0 > > > I believe the lock order reversal and the panic may not be related. > Unfortunately, the instruction pointer provided here does not appear to > correspond with any code, and I couldn't drop into the debugger so > couldn't get any more information. > > Robert N M Watson FreeBSD Core Team, TrustedBSD Project > robert@fledge.watson.org NAI Labs, Safeport Network Services > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-current" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message