From: Steven Rostedt <rostedt@goodmis.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: Jason Baron <jbaron@redhat.com>,
LKML <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Frederic Weisbecker <fweisbec@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@zytor.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Arnaldo Carvalho de Melo <acme@redhat.com>
Subject: Re: [PATCH][GIT PULL] tracing: Fix compile issue for trace_sched_wakeup.c
Date: Thu, 21 Oct 2010 07:14:16 -0400 [thread overview]
Message-ID: <1287659656.16971.573.camel@gandalf.stny.rr.com> (raw)
In-Reply-To: <20101020154045.GA18353@elte.hu>
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] [<c1a7f561>] schedule_timeout+0x1c/0x1e7
> [ 245.712036] [<c1a818b6>] ? _raw_spin_unlock_irq+0x2d/0x43
> [ 245.716037] [<c1027f2d>] ? sub_preempt_count+0x4/0x98
> [ 245.720061] [<c1a818b6>] ? _raw_spin_unlock_irq+0x2d/0x43
> [ 245.724036] [<c1027fb4>] ? sub_preempt_count+0x8b/0x98
> [ 245.728036] [<c1a7e76b>] wait_for_common+0xc1/0x11a
> [ 245.732062] [<c102de32>] ? default_wake_function+0x0/0x12
> [ 245.736041] [<c1a7e863>] wait_for_completion+0x17/0x19
> [ 245.740069] [<c10667a2>] __stop_cpus+0xdd/0x103
> [ 245.744072] [<c1a7e6db>] ? wait_for_common+0x31/0x11a
> [ 245.748040] [<c10665a4>] ? stop_machine_cpu_stop+0x0/0x9a
> [ 245.752040] [<c106683d>] stop_cpus+0x2c/0x3f
> [ 245.756069] [<c10668af>] __stop_machine+0x5f/0x67
> [ 245.760186] [<c1006240>] ? stop_machine_text_poke+0x0/0x43
> [ 245.764040] [<c1006240>] ? stop_machine_text_poke+0x0/0x43
> [ 245.768071] [<c19f0a73>] ? cfdgml_create+0x2b/0xde
> [ 245.772040] [<c10060fd>] text_poke_smp+0x3a/0x42
> [ 245.776039] [<c19f0a73>] ? cfdgml_create+0x2b/0xde
> [ 245.780098] [<c1005b9c>] arch_jump_label_transform+0x53/0x67
> [ 245.784042] [<c104ef0d>] 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] [<c1070b33>] tracepoint_update_probe_range+0xec/0x116
> [ 245.792070] [<c1070c74>] tracepoint_probe_unregister+0x51/0x6b
> [ 245.796040] [<c107f3c0>] ftrace_event_reg+0x48/0x4c
> [ 245.800041] [<c107e87c>] ftrace_event_enable_disable+0x39/0x8a
> [ 245.804070] [<c107ebdf>] __ftrace_set_clr_event+0x91/0xbc
> [ 245.808043] [<c1fbee72>] event_trace_self_tests+0x1cd/0x239
> [ 245.812040] [<c1fbf025>] event_trace_self_tests_init+0x2a/0x39
> [ 245.816230] [<c1fab282>] do_one_initcall+0x47/0x113
> [ 245.820069] [<c1fbeffb>] ? event_trace_self_tests_init+0x0/0x39
> [ 245.824040] [<c1fbeffb>] ? event_trace_self_tests_init+0x0/0x39
> [ 245.828069] [<c1fab477>] kernel_init+0x10d/0x18e
> [ 245.832040] [<c1fab36a>] ? kernel_init+0x0/0x18e
> [ 245.836040] [<c1002c7e>] kernel_thread_helper+0x6/0x10
next prev parent reply other threads:[~2010-10-21 11:14 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-19 17:11 Steven Rostedt
2010-10-19 18:41 ` Ingo Molnar
2010-10-20 15:40 ` Ingo Molnar
2010-10-20 16:37 ` Steven Rostedt
2010-10-20 18:40 ` Ingo Molnar
2010-10-20 16:43 ` Jason Baron
2010-10-20 18:33 ` Ingo Molnar
2010-10-21 11:09 ` Ingo Molnar
2010-10-22 17:58 ` Jason Baron
2010-10-22 18:24 ` Ingo Molnar
2010-10-22 18:39 ` Jason Baron
2010-10-23 20:02 ` Ingo Molnar
2010-10-24 0:53 ` Steven Rostedt
2010-10-24 11:25 ` Ingo Molnar
2010-10-25 8:59 ` Ingo Molnar
2010-10-25 9:30 ` Ingo Molnar
2010-10-25 11:45 ` Ingo Molnar
2010-10-25 12:10 ` Ingo Molnar
2010-10-25 12:18 ` Peter Zijlstra
2010-10-25 12:32 ` Ingo Molnar
2010-10-25 15:47 ` Peter Zijlstra
2010-10-25 16:07 ` Peter Zijlstra
2010-10-25 17:25 ` Ingo Molnar
2010-10-25 17:32 ` Ingo Molnar
2010-10-25 17:45 ` Peter Zijlstra
2010-10-25 17:52 ` Jason Baron
2010-10-30 10:42 ` [tip:perf/urgent] jump label: Add work around to i386 gcc asm goto bug tip-bot for Steven Rostedt
2010-10-25 15:55 ` [PATCH][GIT PULL] tracing: Fix compile issue for trace_sched_wakeup.c Jason Baron
2010-10-25 16:09 ` Peter Zijlstra
2010-10-22 21:42 ` Jason Baron
2010-10-23 4:41 ` Steven Rostedt
2010-10-21 2:58 ` Masami Hiramatsu
2010-10-21 7:22 ` Peter Zijlstra
2010-10-21 11:01 ` Steven Rostedt
2010-10-21 11:03 ` Peter Zijlstra
2010-10-21 12:45 ` Steven Rostedt
2010-10-21 13:50 ` Jason Baron
2010-10-22 4:56 ` Masami Hiramatsu
2010-10-21 14:00 ` Jason Baron
2010-10-21 11:14 ` Steven Rostedt [this message]
2010-10-21 11:26 ` Ingo Molnar
2010-10-21 13:55 ` Jason Baron
2010-10-21 14:43 ` Ingo Molnar
2010-10-22 1:44 ` Jason Baron
2010-10-22 8:14 ` Peter Zijlstra
2010-10-22 14:13 ` Jason Baron
2010-10-22 14:23 ` Peter Zijlstra
2010-10-22 14:36 ` Steven Rostedt
2010-10-22 14:36 ` Jason Baron
2010-10-22 8:16 ` Tejun Heo
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