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Date:	Mon, 25 Oct 2010 13:45:01 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Jason Baron <jbaron@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	masami.hiramatsu.pt@...achi.com
Subject: Re: [PATCH][GIT PULL] tracing: Fix compile issue for
 trace_sched_wakeup.c


* Ingo Molnar <mingo@...e.hu> wrote:

> > here's another crash:
> 
> here's a repeat bootup with the same config:

and here's a new crash with a new config:

[   11.810471] Testing event timer_expire_exit: OK
[   11.850475] Testing event timer_cancel: OK
[   11.890508] Testing event hrtimer_init: OK
[   11.930469] Testing event hrtimer_start: OK
[   11.970475] Testing event hrtimer_expire_entry: 
[   11.980002] BUG: unable to handle kernel NULL pointer dereference at (null)
[   11.980010] IP: [<(null)>] (null)
[   11.980010] *pde = 00000000 
[   11.980010] Oops: 0000 [#1] SMP 
[   11.980010] last sysfs file: 
[   11.980010] Modules linked in:
[   11.980010] 
[   11.980010] Pid: 0, comm: swapper Not tainted 2.6.36-tip-05833-g9db2fad-dirty #52316 A8N-E/System Product Name
[   11.980010] EIP: 0060:[<00000000>] EFLAGS: 00010046 CPU: 0
[   11.980010] EIP is at 0x0
[   11.980010] EAX: f6806a94 EBX: f6806a94 ECX: 00010000 EDX: 00000096
[   11.980010] ESI: f65bdf50 EDI: f6806a00 EBP: f6806a30 ESP: c13dff04
[   11.980010]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[   11.980010] Process swapper (pid: 0, ti=c13de000 task=c13e2f20 task.ti=c13de000)
[   11.980010] Stack:
[   11.980010]  c103d297 00000000 c10460c1 c13dff4c ca105369 00000002 ffffffff 7fffffff
[   11.980010]  c103d52b ca105369 00000002 ca105369 0000002c f6806a00 00000000 f6806a04
[   11.980010]  ca105369 00000002 ca105369 00000002 00000000 f6805dac 00000000 c1420788
[   11.980010] Call Trace:
[   11.980010]  [<c103d297>] ? __run_hrtimer+0x91/0x105
[   11.980010]  [<c10460c1>] ? tick_sched_timer+0x0/0x1a1
[   11.980010]  [<c103d52b>] ? hrtimer_interrupt+0x108/0x20a
[   11.980010]  [<c1012294>] ? smp_apic_timer_interrupt+0x66/0x75
[   11.980010]  [<c12c202a>] ? apic_timer_interrupt+0x36/0x3c
[   11.980010]  [<c10163f0>] ? native_safe_halt+0x2/0x3
[   11.980010]  [<c10072c6>] ? default_idle+0x66/0x91
[   11.980010]  [<c10020f6>] ? cpu_idle+0x98/0xda
[   11.980010]  [<c142280a>] ? start_kernel+0x2f7/0x2fc
[   11.980010] Code:  Bad EIP value.
[   11.980010] EIP: [<00000000>] 0x0 SS:ESP 0068:c13dff04
[   11.980010] CR2: 0000000000000000
[   11.980010] ---[ end trace 74b10a949febd52e ]---
[   11.980011] BUG: unable to handle kernel NULL pointer dereference at (null)
[   11.980011] IP: [<(null)>] (null)
[   11.980011] *pde = 00000000 
[   11.980011] Oops: 0000 [#2] SMP 
[   11.980011] last sysfs file: 
[   11.980011] Modules linked in:
[   11.980011] 
[   11.980011] Pid: 0, comm: kworker/0:0 Tainted: G      D     2.6.36-tip-05833-g9db2fad-dirty #52316 A8N-E/System Product Name
[   11.980011] EIP: 0060:[<00000000>] EFLAGS: 00010046 CPU: 1
[   11.980011] EIP is at 0x0
[   11.980011] EAX: f6a06a94 EBX: f6a06a94 ECX: 00010000 EDX: 00000092
[   11.980011] ESI: f65bdf50 EDI: f6a06a00 EBP: f6a06a30 ESP: f6479ec0
[   11.980011]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[   11.980011] Process kworker/0:0 (pid: 0, ti=f6478000 task=f64364e0 task.ti=f6478000)
[   11.980011] Stack:
[   11.980011]  c103d297 00000000 c10460c1 f6479f08 ca1058de 00000002 ffffffff 7fffffff
[   11.980011]  c103d52b ca1058de 00000002 ca1058de 0000002c f6a06a00 00000000 f6a06a04
[   11.980011]  ca1058de 00000002 ca1058de 00000002 00000000 f6a05dac 00000001 c1420788
[   11.980011] Call Trace:
[   11.980011]  [<c103d297>] ? __run_hrtimer+0x91/0x105
[   11.980011]  [<c10460c1>] ? tick_sched_timer+0x0/0x1a1
[   11.980011]  [<c103d52b>] ? hrtimer_interrupt+0x108/0x20a
[   11.980011]  [<c1012294>] ? smp_apic_timer_interrupt+0x66/0x75
[   11.980011]  [<c12c202a>] ? apic_timer_interrupt+0x36/0x3c
[   11.980011]  [<c10163f0>] ? native_safe_halt+0x2/0x3
[   11.980011]  [<c10072c6>] ? default_idle+0x66/0x91
[   11.980011]  [<c10020f6>] ? cpu_idle+0x98/0xda
[   11.980011]  [<c14501ce>] ? start_secondary+0x200/0x205
[   11.980011] Code:  Bad EIP value.
[   11.980011] EIP: [<00000000>] 0x0 SS:ESP 0068:f6479ec0
[   11.980011] CR2: 0000000000000000
[   11.980011] ---[ end trace 74b10a949febd52f ]---
[   11.980011] Kernel panic - not syncing: Fatal exception in interrupt
[   11.980011] Pid: 0, comm: kworker/0:0 Tainted: G      D     2.6.36-tip-05833-g9db2fad-dirty #52316
[   11.980011] Call Trace:
[   11.980011]  [<c12bfaa3>] ? panic+0x4d/0x13a
[   11.980011]  [<c12c2b31>] ? oops_end+0x72/0x7c
[   11.980011]  [<c1017475>] ? no_context+0x10d/0x117
[   11.980011]  [<c12c42d7>] ? do_page_fault+0x0/0x37c
[   11.980011]  [<c1017591>] ? bad_area_nosemaphore+0xa/0xc
[   11.980011]  [<c12c44a4>] ? do_page_fault+0x1cd/0x37c
[   11.980011]  [<c105a808>] ? rb_reserve_next_event+0x289/0x336
[   11.980011]  [<c113ea0c>] ? trace_hardirqs_off_thunk+0xc/0x10
[   11.980011]  [<c12c42d7>] ? do_page_fault+0x0/0x37c
[   11.980011]  [<c12c42d7>] ? do_page_fault+0x0/0x37c
[   11.980011]  [<c12c21ec>] ? error_code+0x6c/0x74
[   11.980011]  [<c103d297>] ? __run_hrtimer+0x91/0x105
[   11.980011]  [<c10460c1>] ? tick_sched_timer+0x0/0x1a1
[   11.980011]  [<c103d52b>] ? hrtimer_interrupt+0x108/0x20a
[   11.980011]  [<c1012294>] ? smp_apic_timer_interrupt+0x66/0x75
[   11.980011]  [<c12c202a>] ? apic_timer_interrupt+0x36/0x3c
[   11.980011]  [<c10163f0>] ? native_safe_halt+0x2/0x3
[   11.980011]  [<c10072c6>] ? default_idle+0x66/0x91
[   11.980011]  [<c10020f6>] ? cpu_idle+0x98/0xda
[   11.980011]  [<c14501ce>] ? start_secondary+0x200/0x205
[   11.980010] Kernel panic - not syncing: Fatal exception in interrupt
[   11.980010] Pid: 0, comm: swapper Tainted: G      D     2.6.36-tip-05833-g9db2fad-dirty #52316
[   11.980010] Call Trace:
[   11.980010]  [<c12bfaa3>] ? panic+0x4d/0x13a
[   11.980010]  [<c12c2b31>] ? oops_end+0x72/0x7c
[   11.980010]  [<c1017475>] ? no_context+0x10d/0x117
[   11.980010]  [<c12c42d7>] ? do_page_fault+0x0/0x37c
[   11.980010]  [<c1017591>] ? bad_area_nosemaphore+0xa/0xc
[   11.980010]  [<c12c44a4>] ? do_page_fault+0x1cd/0x37c
[   11.980010]  [<c105a808>] ? rb_reserve_next_event+0x289/0x336
[   11.980010]  [<c113ea0c>] ? trace_hardirqs_off_thunk+0xc/0x10
[   11.980010]  [<c12c42d7>] ? do_page_fault+0x0/0x37c
[   11.980010]  [<c12c42d7>] ? do_page_fault+0x0/0x37c
[   11.980010]  [<c12c21ec>] ? error_code+0x6c/0x74
[   11.980010]  [<c103d297>] ? __run_hrtimer+0x91/0x105
[   11.980010]  [<c10460c1>] ? tick_sched_timer+0x0/0x1a1
[   11.980010]  [<c103d52b>] ? hrtimer_interrupt+0x108/0x20a
[   11.980010]  [<c1012294>] ? smp_apic_timer_interrupt+0x66/0x75
[   11.980010]  [<c12c202a>] ? apic_timer_interrupt+0x36/0x3c
[   11.980010]  [<c10163f0>] ? native_safe_halt+0x2/0x3
[   11.980010]  [<c10072c6>] ? default_idle+0x66/0x91
[   11.980010]  [<c10020f6>] ? cpu_idle+0x98/0xda
[   11.980010]  [<c142280a>] ? start_kernel+0x2f7/0x2fc

	Ingo

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