From mboxrd@z Thu Jan 1 00:00:00 1970 From: Fernando Lopez-Lezcano Subject: 2.6.33.5 rt23: machine lockup (nfs/autofs related?) Date: Thu, 08 Jul 2010 10:19:50 -0700 Message-ID: <1278609590.7527.11.camel@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: LKML , rt-users , Steven Rostedt , Nick Piggin , John Stultz , Fernando Pablo Lopez-Lezcano To: Thomas Gleixner Return-path: Received: from smtp1.Stanford.EDU ([171.67.219.81]:53920 "EHLO smtp.stanford.edu" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1758233Ab0GHR1n (ORCPT ); Thu, 8 Jul 2010 13:27:43 -0400 Sender: linux-rt-users-owner@vger.kernel.org List-ID: We are having problems with 2.6.33.5+rt23, at least in our configuration while accessing an nfs automounted directory. This causes a complete machine lockup (press reset to exit as the only option). I simply use the Nautilus file manager (in Fedora 12) to navigate to an autofs mounted directory and the process monitor goes to 100% on one core (or maybe two), the mouse jerks a bit and the whole thing goes catatonic almost immediately. I get this in any open terminal at the time of the crash: -------- Message from syslogd@localhost at Jul 8 10:13:54 ... kernel:------------[ cut here ]------------ Message from syslogd@localhost at Jul 8 10:13:54 ... kernel:invalid opcode: 0000 [#1] PREEMPT SMP Message from syslogd@localhost at Jul 8 10:13:54 ... kernel:last sysfs file: /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq Message from syslogd@localhost at Jul 8 10:13:54 ... kernel:Process nautilus (pid: 2874, ti=f0204000 task=f17dd1f0 task.ti=f0204000) Message from syslogd@localhost at Jul 8 10:13:54 ... kernel:Stack: Message from syslogd@localhost at Jul 8 10:13:54 ... kernel:Call Trace: Message from syslogd@localhost at Jul 8 10:13:54 ... kernel:Code: 7b 08 00 89 45 b8 75 12 8d 43 04 89 43 04 89 43 08 8d 43 0c 89 43 0c 89 43 10 8b 43 14 64 8b 15 2c d1 a5 c0 83 e0 fc 39 c2 75 04 <0f> 0b eb fe 8b 3a 81 ff 08 01 00 00 74 0a 83 ff 02 b8 04 00 00 Message from syslogd@localhost at Jul 8 10:13:54 ... kernel:EIP: [] rt_spin_lock_slowlock+0x43/0x1bb SS:ESP 0068:f0205cbc -------- And that's it... nothing else in the logs. For now we are booting into the normal Fedora kernel (this is on Fedora 12) as this makes the rt kernel not usable in our setup. Let me know if there is anything else I can do to help debug this... -- Fernando