[lttng-dev] lttng create call trace on kernel 4.19
Mathieu Desnoyers
mathieu.desnoyers at efficios.com
Fri Oct 12 11:10:09 EDT 2018
----- On Oct 11, 2018, at 9:21 PM, Dengke Du dengke.du at windriver.com wrote:
> On 2018年10月11日 21:22, Jonathan Rajotte-Julien wrote:
>> Hi,
>>
>> On Thu, Oct 11, 2018 at 02:00:11PM +0800, Dengke Du wrote:
>>> Hi all
>>>
>>> When I create a local trace session, meeting a call trace:
>>>
>>> uname -a:
>>>
>>> Linux qemux86-64 4.19.0-rc7-yoctodev-standard #1 SMP PREEMPT Thu Oct 11
>>> 03:32:48 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
>> Which yocto branch, recipes(for kernel, lttng-tools, lttng-modules) and target?
>>
>> Which version of lttng-modules are you using?
Please answer the questions above as well.
Thanks,
Mathieu
>>
>> Any modification to the kernel?
>
> Yocto: master branch
> Kernel: linux-yocto-dev
>
> phenomenon 1:
> linux-yocto was ok (v4.18)
> phenomenon 2:
> linux-yocto-dev was not ok (v4.19)
>
> Maybe some kernel commit breaks it.
>
>>
>>> lttng create trace_session --live -U net://127.0.0.1
>>>
>>> ----------------------------------------------------------------------------------------------------------
>>>
>>> [ 222.390601] lttng_kretprobes: loading out-of-tree module taints kernel.
>>> [ 223.550725] BUG: unable to handle kernel paging request at
>>> 0000111400001158
>>> [ 223.551661] PGD 0 P4D 0
>>> [ 223.552476] Oops: 0000 [#1] PREEMPT SMP PTI
>>> [ 223.553170] CPU: 0 PID: 500 Comm: modprobe Tainted: G O
>>> 4.19.0-rc7-yoctodev-standard #1
>>> [ 223.553892] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
>>> rel-1.11.2-0-gf9626ccb91-prebuilt.qemu-project.org 04/01/2014
>>> [ 223.556619] RIP: 0010:lttng_tracepoint_notify+0x16e/0x200 [lttng_tracer]
>>> [ 223.557751] Code: eb bd 48 39 c1 0f 85 a3 00 00 00 49 8b 55 10 41 83 c4
>>> 01 44 39 a2 8c 02 00 00 76 a3 48 8b 92 90 02 00 00 49 63 c4 48 8b 0c c2 <4c>
>>> 8b 31 48 89 4d d0 4c 89 f7 e8 90
>>> [ 223.559769] RSP: 0000:ffffa39a00373bc0 EFLAGS: 00000206
>>> [ 223.560303] RAX: 0000000000000000 RBX: ffff9b3dd45a83a0 RCX:
>>> 0000111400001158
>>> [ 223.560959] RDX: ffffffffc01b9048 RSI: 0000000000000001 RDI:
>>> ffffffffc02f1100
>>> [ 223.561579] RBP: ffffa39a00373bf0 R08: 0000000000000064 R09:
>>> ffff9b3ddec01600
>>> [ 223.562388] R10: ffffffffc0287411 R11: ffffffff98dc9660 R12:
>>> 0000000000000000
>>> [ 223.563008] R13: ffff9b3dd45a83a0 R14: ffffa39a00373e78 R15:
>>> 0000000000000002
>>> [ 223.563905] FS: 00007fb049015740(0000) GS:ffff9b3ddf200000(0000)
>>> knlGS:0000000000000000
>>> [ 223.564941] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>>> [ 223.565501] CR2: 0000111400001158 CR3: 0000000014586000 CR4:
>>> 00000000000006f0
>>> [ 223.566450] Call Trace:
>>> [ 223.568367] ? lttng_kernel_tracepoint_add+0x50/0xc0 [lttng_tracer]
>>> [ 223.569932] register_tracepoint_module_notifier+0x57/0x80
>>> [ 223.571309] ? 0xffffffffc0309000
>>> [ 223.572187] lttng_tracepoint_init+0x45/0xbf9 [lttng_tracer]
>>> [ 223.573125] lttng_events_init+0x40/0x1cc [lttng_tracer]
>>> [ 223.573820] ? 0xffffffffc0309000
>>> [ 223.574237] do_one_initcall+0x53/0x1fe
>>> [ 223.574682] ? __vunmap+0x8e/0xc0
>>> [ 223.575196] ? kmem_cache_alloc_trace+0xfc/0x1d0
>>> [ 223.575684] ? do_init_module+0x27/0x210
>>> [ 223.576285] do_init_module+0x60/0x210
>>> [ 223.576702] load_module+0x2406/0x2570
>>> [ 223.577140] ? vfs_read+0x115/0x140
>>> [ 223.577611] ? vfs_read+0x115/0x140
>>> [ 223.578034] __se_sys_finit_module+0xc3/0xe0
>>> [ 223.578581] ? __se_sys_finit_module+0xc3/0xe0
>>> [ 223.579135] __x64_sys_finit_module+0x1a/0x20
>>> [ 223.579627] do_syscall_64+0x4d/0xf0
>>> [ 223.580071] entry_SYSCALL_64_after_hwframe+0x44/0xa9
>>> [ 223.580837] RIP: 0033:0x7fb049107569
>>> [ 223.581286] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48
>>> 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48>
>>> 3d 01 f0 ff ff 73 01 c3 48 8b 08
>>> [ 223.583210] RSP: 002b:00007ffc80620498 EFLAGS: 00000246 ORIG_RAX:
>>> 0000000000000139
>>> [ 223.583958] RAX: ffffffffffffffda RBX: 000055931b680b70 RCX:
>>> 00007fb049107569
>>> [ 223.584677] RDX: 0000000000000000 RSI: 000055931b67734e RDI:
>>> 000000000000000a
>>> [ 223.585372] RBP: 0000000000000000 R08: 0000000000000000 R09:
>>> 000055931b680b70
>>> [ 223.586008] R10: 000000000000000a R11: 0000000000000246 R12:
>>> 000055931b67734e
>>> [ 223.586696] R13: 0000000000040000 R14: 0000000000000000 R15:
>>> 0000000000000000
>>> [ 223.587620] Modules linked in: lttng_tracer(O+) lttng_statedump(O)
>>> lttng_ftrace(O) lttng_kprobes(O) lttng_clock(O) lttng_lib_ring_buffer(O)
>>> lttng_kretprobes(O) deflate twofish_geneb
>>> [ 223.597615] CR2: 0000111400001158
>>> [ 223.614673] ---[ end trace 514884c3611a01af ]---
>>> [ 223.615793] RIP: 0010:lttng_tracepoint_notify+0x16e/0x200 [lttng_tracer]
>>> [ 223.616604] Code: eb bd 48 39 c1 0f 85 a3 00 00 00 49 8b 55 10 41 83 c4
>>> 01 44 39 a2 8c 02 00 00 76 a3 48 8b 92 90 02 00 00 49 63 c4 48 8b 0c c2 <4c>
>>> 8b 31 48 89 4d d0 4c 89 f7 e8 90
>>> [ 223.624684] RSP: 0000:ffffa39a00373bc0 EFLAGS: 00000206
>>> [ 223.625177] RAX: 0000000000000000 RBX: ffff9b3dd45a83a0 RCX:
>>> 0000111400001158
>>> [ 223.626102] RDX: ffffffffc01b9048 RSI: 0000000000000001 RDI:
>>> ffffffffc02f1100
>>> [ 223.632541] RBP: ffffa39a00373bf0 R08: 0000000000000064 R09:
>>> ffff9b3ddec01600
>>> [ 223.633110] R10: ffffffffc0287411 R11: ffffffff98dc9660 R12:
>>> 0000000000000000
>>> [ 223.637690] R13: ffff9b3dd45a83a0 R14: ffffa39a00373e78 R15:
>>> 0000000000000002
>>> [ 223.641583] FS: 00007fb049015740(0000) GS:ffff9b3ddf200000(0000)
>>> knlGS:0000000000000000
>>> [ 223.642238] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>>> [ 223.642906] CR2: 00007f6eae3e4b58 CR3: 0000000014586000 CR4:
>>> 00000000000006f0
>>> 2018 Oct 11 05:37:07 qemux86-64 [ 223.550725] BUG: unable to handle kernel
>>> paging request at 0000111400001158
>>> 2018 Oct 11 05:37:07 qemux86-64 BUG: unable to handle kernel paging request
>>> at 0000111400001158
>>>
>>> ----------------------------------------------------------------------------------------------------------
>>>
>>> When I type that command again:
>>>
>>> ----------------------------------------------------------------------------------------------------------
>>>
>>> Spawning a session daemon
>>> Error: Session daemon terminated with an error (exit status: 1)
>>> Error: Problem occurred while launching session daemon
>>> (/usr/bin/lttng-sessiond)
>>> Error: Command error
>>>
>>> ----------------------------------------------------------------------------------------------------------
>>>
>>>
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>>> https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
>
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--
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com
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