From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757504Ab0JULOU (ORCPT ); Thu, 21 Oct 2010 07:14:20 -0400 Received: from hrndva-omtalb.mail.rr.com ([71.74.56.124]:47727 "EHLO hrndva-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757078Ab0JULOT (ORCPT ); Thu, 21 Oct 2010 07:14:19 -0400 X-Authority-Analysis: v=1.1 cv=+c36koQ5Dcj/1qolKHjtkYAGXvrVJRRiKMp+84F5sLg= c=1 sm=0 a=LuwKl7ggZIAA:10 a=Q9fys5e9bTEA:10 a=OPBmh+XkhLl+Enan7BmTLg==:17 a=4BKNm4wy7LaF7vkoOuIA:9 a=EjixQbyAtvvveGDfHqtCAD8o1bEA:4 a=PUjeQqilurYA:10 a=OPBmh+XkhLl+Enan7BmTLg==:117 X-Cloudmark-Score: 0 X-Originating-IP: 67.242.120.143 Subject: Re: [PATCH][GIT PULL] tracing: Fix compile issue for trace_sched_wakeup.c From: Steven Rostedt To: Ingo Molnar Cc: Jason Baron , LKML , Andrew Morton , Frederic Weisbecker , Thomas Gleixner , "H. Peter Anvin" , Peter Zijlstra , Arnaldo Carvalho de Melo In-Reply-To: <20101020154045.GA18353@elte.hu> References: <1287508282.16971.386.camel@gandalf.stny.rr.com> <20101019184111.GA17266@elte.hu> <20101020154045.GA18353@elte.hu> Content-Type: text/plain; charset="ISO-8859-15" Date: Thu, 21 Oct 2010 07:14:16 -0400 Message-ID: <1287659656.16971.573.camel@gandalf.stny.rr.com> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2010-10-20 at 17:40 +0200, Ingo Molnar wrote: > FYI, there's a new mystery hang (sometimes crash) that triggers in -tip - and which > seems to be tracing related. See the crashlog below - config attached. > > It's not bisectable - small changes in the kernel make the bug come/go. (might be a > race of some sorts) > > [ 42.324027] Testing all events: > [ 245.668090] INFO: task swapper:1 blocked for more than 120 seconds. > [ 245.672051] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > [ 245.676026] swapper D f6420b40 6544 1 0 0x00000000 > [ 245.684051] f6437dac 00000046 f694aac0 f6420b40 f6438000 f6437d74 f6438294 f6438290 > [ 245.692237] c2192ac0 c204e6c0 c2192ac0 c2192ac0 f6438290 00000000 f6438000 ff2ffa7d > [ 245.701068] 00000009 f6420b40 f6437e5c 7fffffff f6438000 f6437dfc f6437e5c 7fffffff > [ 245.709071] Call Trace: > [ 245.711551] [] schedule_timeout+0x1c/0x1e7 > [ 245.712036] [] ? _raw_spin_unlock_irq+0x2d/0x43 > [ 245.716037] [] ? sub_preempt_count+0x4/0x98 > [ 245.720061] [] ? _raw_spin_unlock_irq+0x2d/0x43 > [ 245.724036] [] ? sub_preempt_count+0x8b/0x98 > [ 245.728036] [] wait_for_common+0xc1/0x11a > [ 245.732062] [] ? default_wake_function+0x0/0x12 > [ 245.736041] [] wait_for_completion+0x17/0x19 > [ 245.740069] [] __stop_cpus+0xdd/0x103 > [ 245.744072] [] ? wait_for_common+0x31/0x11a > [ 245.748040] [] ? stop_machine_cpu_stop+0x0/0x9a > [ 245.752040] [] stop_cpus+0x2c/0x3f > [ 245.756069] [] __stop_machine+0x5f/0x67 > [ 245.760186] [] ? stop_machine_text_poke+0x0/0x43 > [ 245.764040] [] ? stop_machine_text_poke+0x0/0x43 > [ 245.768071] [] ? cfdgml_create+0x2b/0xde > [ 245.772040] [] text_poke_smp+0x3a/0x42 > [ 245.776039] [] ? cfdgml_create+0x2b/0xde > [ 245.780098] [] arch_jump_label_transform+0x53/0x67 > [ 245.784042] [] jump_label_update+0x49/0x98 Looks like this code had jump labels enabled. Do you have a dump where they are not enabled? -- Steve > [ 245.788041] [] tracepoint_update_probe_range+0xec/0x116 > [ 245.792070] [] tracepoint_probe_unregister+0x51/0x6b > [ 245.796040] [] ftrace_event_reg+0x48/0x4c > [ 245.800041] [] ftrace_event_enable_disable+0x39/0x8a > [ 245.804070] [] __ftrace_set_clr_event+0x91/0xbc > [ 245.808043] [] event_trace_self_tests+0x1cd/0x239 > [ 245.812040] [] event_trace_self_tests_init+0x2a/0x39 > [ 245.816230] [] do_one_initcall+0x47/0x113 > [ 245.820069] [] ? event_trace_self_tests_init+0x0/0x39 > [ 245.824040] [] ? event_trace_self_tests_init+0x0/0x39 > [ 245.828069] [] kernel_init+0x10d/0x18e > [ 245.832040] [] ? kernel_init+0x0/0x18e > [ 245.836040] [] kernel_thread_helper+0x6/0x10