From owner-freebsd-current@FreeBSD.ORG Fri Sep 3 20:16:29 2004 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 73AF716A4CE; Fri, 3 Sep 2004 20:16:29 +0000 (GMT) Received: from cpanel.ezone.ru (cpanel.ezone.ru [213.85.31.234]) by mx1.FreeBSD.org (Postfix) with ESMTP id 5ABF843D58; Fri, 3 Sep 2004 20:16:28 +0000 (GMT) (envelope-from mcsi@mcsi.pp.ru) Received: from [81.195.2.185] (ppp2-185.pppoe.mtu-net.ru [81.195.2.185]) (authenticated bits=0) by cpanel.ezone.ru (8.13.1/8.12.11) with ESMTP id i83KGJhB003503; Sat, 4 Sep 2004 00:16:20 +0400 (MSD) (envelope-from mcsi@mcsi.pp.ru) Message-ID: <4138D10E.4060809@mcsi.pp.ru> Date: Sat, 04 Sep 2004 00:16:14 +0400 From: Maxim Maximov User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.7.2) Gecko/20040810 X-Accept-Language: ru, en-us, en MIME-Version: 1.0 To: John Baldwin References: <4137EA5C.30606@mcsi.pp.ru> <4138A524.8080107@root.org> <4138A806.9020105@mcsi.pp.ru> <200409031341.47074.jhb@FreeBSD.org> In-Reply-To: <200409031341.47074.jhb@FreeBSD.org> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, hits=-4.9 required=5.0 tests=BAYES_00 autolearn=ham version=2.64 X-Spam-Checker-Version: SpamAssassin 2.64 (2004-01-11) on mail3.ezone.ru cc: current@FreeBSD.org cc: Nate Lawson Subject: Re: panic on shutdown X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 03 Sep 2004 20:16:29 -0000 John Baldwin wrote: > On Friday 03 September 2004 01:21 pm, Maxim Maximov wrote: > >>Nate Lawson wrote: >> >>>John Baldwin wrote: >>> >>>>On Thursday 02 September 2004 11:51 pm, Maxim Maximov wrote: >>>> >>>>>Hello. >>>>> >>>>> I just got this panic on shutdown using Power button, hand >>>>>transcribed: >>>>> >>>>>Syncing disks: >>>>>No buffers busy after final sync >>>>>Uptime: 21m53s >>>>>Powering system off using ACPI >>>>> >>>>>panic: lock (sleep mutex) Giant not locked @ >>>>>/usr/src/sys/kern/kern_timeout.c:279 >>>>> >>>>>cpuid = 0 >>>>>KDB: enter: panic >>>>>ACPI power-off failed - timeout >>>>> >>>>>Rebooting... >>>>>cpu_reset: called on cpu#1 >>>>>cpu_reset: Stopping other CPUs >>>>> >>>>>Here it hung until I pressed Power button again. Then it shut down. >>>> >>>>Looks like the timeout/callout routine dropped Giant more than it >>>>acquired it. >>> >>>I don't see how this could be triggered by ACPI. If you reboot the >>>system with ACPI disabled (or enabled), do you also get this message? >> >>My system can't boot with ACPI disabled. >> >>Also I want to mention that this panic is rare. I've seen it about 10 >>times in 2-3 months of everyday rebooting. >> >>And by the way, the command issued to shut the system down was 'halt -p' > > > I would hack the timeout code to add some printf's before the > mtx_unlock(&Giant) to dump the function pointer and argument > if !tmtx_owned(&Giant) and then use gdb to figure out what the callout > function was. I.e. something like: > > if (not mpsafe) { > if (!mtx_owned(&Giant)) > printf("func = %p, arg = %p\n", c_func, c_arg) > mtx_unlock(&Giant); > } > Thanks, I recompiled kernel with this code. I'll let you know if this yields anything.. -- Maxim Maximov