From owner-freebsd-current Fri Feb 23 9:57:53 2001 Delivered-To: freebsd-current@freebsd.org Received: from zibbi.icomtek.csir.co.za (zibbi.icomtek.csir.co.za [146.64.24.58]) by hub.freebsd.org (Postfix) with ESMTP id E904237B4EC for ; Fri, 23 Feb 2001 09:57:17 -0800 (PST) (envelope-from jhay@zibbi.icomtek.csir.co.za) Received: (from jhay@localhost) by zibbi.icomtek.csir.co.za (8.11.1/8.11.1) id f1NHuTq91448 for current@FreeBSD.org; Fri, 23 Feb 2001 19:56:29 +0200 (SAT) (envelope-from jhay) From: John Hay Message-Id: <200102231756.f1NHuTq91448@zibbi.icomtek.csir.co.za> Subject: tail -f kernel panic To: current@FreeBSD.org Date: Fri, 23 Feb 2001 19:56:28 +0200 (SAT) X-Mailer: ELM [version 2.4ME+ PL54 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG I found it is quite easy to panic a -current kernel with 2 login windows. In window 1 do a "tail -f /tmp/world.out" In window 2 do a "tail -f /tmp/world.out" In window 2 do "^C" to break out of tail -f In window 1 do "^C" to break out of tail -f The box panic immediately. I can't get a coredump at the moment because the kernel just stops while doing the "syncing disks... 7 7"... Maybe it is related to kern/25309? Fatal trap 12: page fault while in kernel mode cpuid = 1; lapic.id = 00000000 fault virtual address = 0x0 fault code = supervisor read, page not present instruction pointer = 0x8:0xc023175a stack pointer = 0x10:0xc8fe5db4 frame pointer = 0x10:0xc8fe5dc0 code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, def32 1, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = 347 (tail) trap number = 12 panic: page fault cpuid = 1; lapic.id = 00000000 boot() called on cpu#1 syncing disks... 7 7 c02312e8 t ufs_advlock c0231310 T ufs_vinit c02313bc t ufs_makeinode c023159c t ufs_missingop c02315b4 t ufs_kqfilter c02316d4 t filt_ufsdetach c02317dc t filt_ufsread c0231808 t filt_ufsvnode c023182c T ufs_vnoperate John -- John Hay -- John.Hay@icomtek.csir.co.za To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message