From owner-freebsd-stable@FreeBSD.ORG Tue Mar 18 21:38:32 2014 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 927D9F80; Tue, 18 Mar 2014 21:38:32 +0000 (UTC) Received: from mail-pb0-x22d.google.com (mail-pb0-x22d.google.com [IPv6:2607:f8b0:400e:c01::22d]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 5C3481AF; Tue, 18 Mar 2014 21:38:32 +0000 (UTC) Received: by mail-pb0-f45.google.com with SMTP id uo5so7898698pbc.32 for ; Tue, 18 Mar 2014 14:38:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date:message-id:subject :from:to:cc:content-type; bh=4F8p+H6XuZqIq75INvt/ViUKDpVYn/+OlkpRJeZmS9Q=; b=E5rElZ0KNNLOTLPwL6KtTZ+yV07YPyEUKdynPARfqqmeD0WcfknwUYMSxefCXNzohX wZcWzl/tE1KmMTgZlwCRalrmTmdYi/JIk3Aw5XQWyWol4OMCONKcy7FtBUbrsvLTbKcE VafQ7E8nziLNsvePMK5D/PfKAyUfMZ6WKlDoPUJSuDo6x6MHCgDEtgtOFBEVyNSqgNNc l6SYmrEfXGOBsfh9PpcHh8dP3SA6xMKR+p8shkzjvCxHuH5XeBY+0hkpUn8UffXHJXZc FQKDLLkhlLwGyW43HcwKIRk+QQu88GPdJ8BMgiDdiJihS2W0O/I5+QUL+fP1/QMx2bFu MNXQ== MIME-Version: 1.0 X-Received: by 10.68.139.2 with SMTP id qu2mr955575pbb.164.1395178711937; Tue, 18 Mar 2014 14:38:31 -0700 (PDT) Sender: kob6558@gmail.com Received: by 10.66.0.164 with HTTP; Tue, 18 Mar 2014 14:38:31 -0700 (PDT) In-Reply-To: <201403181527.17100.jhb@freebsd.org> References: <201403181527.17100.jhb@freebsd.org> Date: Tue, 18 Mar 2014 14:38:31 -0700 X-Google-Sender-Auth: 88wgAHJkC1jJJqBw01ZPwK_E4pc Message-ID: Subject: Re: Clock issues and crash on resume on 10-Stable r263062M From: Kevin Oberman To: John Baldwin Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.17 Cc: ray@freebsd.org, FreeBSD-STABLE Mailing List X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 18 Mar 2014 21:38:32 -0000 On Tue, Mar 18, 2014 at 12:27 PM, John Baldwin wrote: > On Saturday, March 15, 2014 3:44:46 pm Kevin Oberman wrote: > > 2. The time does not update after resume. After about 2 seconds, ehe > system > > crashes. > > Fatal trap 12: page fault while in kernel mode > > cpuid = 0; apic id = 00 > > fault virtual address = 0x30 > > fault code = supervisor read data, page not present > > instruction pointer = 0x20:0xffffffff808c9ef3 > > stack pointer = 0x28:0xfffffe00f13548e0 > > frame pointer = 0x28:0xfffffe00f13549b0 > > code segment = base 0x0, limit 0xfffff, type 0x1b > > = DPL 0, pres 1, long 1, def32 0, gran 1 > > processor eflags = interrupt enabled, resume, IOPL = 0 > > current process = 12 (swi4: clock) > > trap number = 12 > > panic: page fault > > cpuid = 0 > > KDB: stack backtrace: > > #0 0xffffffff808ed460 at kdb_backtrace+0x60 > > #1 0xffffffff808b4e35 at panic+0x155 > > #2 0xffffffff80c97022 at trap_fatal+0x3a2 > > #3 0xffffffff80c972f9 at trap_pfault+0x2c9 > > #4 0xffffffff80c96a8b at trap+0x5bb > > #5 0xffffffff80c7dd42 at calltrap+0x8 > > #6 0xffffffff808ca304 at softclock+0x94 > > #7 0xffffffff8088929b at intr_event_execute_handlers+0xab > > #8 0xffffffff808896e6 at ithread_loop+0x96 > > #9 0xffffffff80886f4a at fork_exit+0x9a > > #10 0xffffffff80c7e27e at fork_trampoline+0xe > > [...] > > #0 doadump (textdump=) at pcpu.h:219 > > 219 pcpu.h: No such file or directory. > > in pcpu.h > > (kgdb) #0 doadump (textdump=) at pcpu.h:219 > > #1 0xffffffff808b4ab0 in kern_reboot (howto=260) > > at /usr/src/sys/kern/kern_shutdown.c:452 > > #2 0xffffffff808b4e74 in panic (fmt=) > > at /usr/src/sys/kern/kern_shutdown.c:759 > > #3 0xffffffff80c97022 in trap_fatal (frame=, > > eva=) at /usr/src/sys/amd64/amd64/trap.c:875 > > #4 0xffffffff80c972f9 in trap_pfault (frame=0xfffffe00f1354830, > usermode=0) > > at /usr/src/sys/amd64/amd64/trap.c:692 > > #5 0xffffffff80c96a8b in trap (frame=0xfffffe00f1354830) > > at /usr/src/sys/amd64/amd64/trap.c:456 > > #6 0xffffffff80c7dd42 in calltrap () > > at /usr/src/sys/amd64/amd64/exception.S:232 > > #7 0xffffffff808c9ef3 in softclock_call_cc (c=0xffffffff813834b8, > > cc=0xffffffff81527680, direct=0) at > /usr/src/sys/kern/kern_timeout.c:701 > > #8 0xffffffff808ca304 in softclock (arg=0xffffffff81527680) > > at /usr/src/sys/kern/kern_timeout.c:810 > > This is actually a crash in newcons. Try setting kern.vt.suspendswitch to > 0 > as a workaround. > > -- > John Baldwin > Ack! I had forgotten seeing the thread on this just a while back, before vt was committed to 10. Thanks so much! -- R. Kevin Oberman, Network Engineer, Retired E-mail: rkoberman@gmail.com