Hi all,
Pressing sysRq+T always produce an Oops for every running system task (94
Oopses, that's a record ;)).
The bug is 100% reproducable. Should I begin bisecting/investigating the
issue or it's a known problem ?
$ ver_linux
Linux darwish-laptop 2.6.23-rc9 #23 Sat Oct 6 21:48:45 EET 2007 i686 GNU/Linux
Gnu C 4.0.3
Gnu make 3.81beta4
binutils 2.16.91
util-linux 2.12r
mount 2.12r
module-init-tools 3.2.2
e2fsprogs 1.38
Linux C Library 3.6
Dynamic linker (ldd) 2.3.6
Procps 3.2.6
Net-tools 1.60
Console-tools 0.2.3
Sh-utils 5.93
udev 079
[ 226.309874] SysRq : Show State
[ 226.309948] task PC stack pid father
[ 226.310105] init S c1465b64 0 1 0
[ 226.310195] c1465b54 00000082 00000286 c1465b64 c04255c0 c03c3ec0 00000000 00000286
[ 226.310414] c1465b64 fffd689a 0000000b 00000000 c02e8fda c1537040 00000292 c0425ab4
[ 226.310664] c0425ab4 fffd689a c0123cd0 c14634f0 c04255c0 00000800 c1465f9c c0176bf5
[ 226.310914] Call Trace:
[ 226.310995] [<c02e8fda>] schedule_timeout+0x4a/0xc0
[ 226.311075] [<c0123cd0>] process_timeout+0x0/0x10
[ 226.311148] [<c0176bf5>] do_select+0x375/0x4b0
[ 226.311231] [<c01760e0>] __pollwait+0x0/0x100
[ 226.311302] [<c0117a50>] default_wake_function+0x0/0x10
[ 226.311379] [<c0138bad>] __lock_acquire+0x74d/0x1130
[ 226.311452] [<c01c0278>] do_get_write_access+0x2c8/0x570
[ 226.311538] [<c0164a39>] poison_obj+0x29/0x60
[ 226.311613] [<c0139997>] mark_held_locks+0x67/0x80
[ 226.311684] [<c01663dd>] kmem_cache_free+0xad/0xf0
[ 226.311755] [<c0139b64>] trace_hardirqs_on+0x104/0x170
[ 226.311832] [<c0138bad>] __lock_acquire+0x74d/0x1130
[ 226.311903] [<c0138bad>] __lock_acquire+0x74d/0x1130
[ 226.311981] [<c0138bad>] __lock_acquire+0x74d/0x1130
[ 226.312052] [<c01aefb6>] ext3_ordered_commit_write+0xa6/0xe0
[ 226.312137] [<c0138bad>] __lock_acquire+0x74d/0x1130
[ 226.312207] [<c02eb074>] _spin_unlock+0x14/0x20
[ 226.312278] [<c017c0d7>] __d_lookup+0x107/0x110
[ 226.312352] [<c01dbc95>] _atomic_dec_and_lock+0x15/0x40
[ 226.312428] [<c02eb074>] _spin_unlock+0x14/0x20
[ 226.312498] [<c01dbcaa>] _atomic_dec_and_lock+0x2a/0x40
[ 226.312570] [<c017ae71>] dput+0x51/0x120
[ 226.312638] [<c0172b0e>] __link_path_walk+0xc4e/0xca0
[ 226.312718] [<c0176ef6>] core_sys_select+0x1c6/0x320
[ 226.312796] [<c0164a39>] poison_obj+0x29/0x60
[ 226.312868] [<c01653c0>] cache_free_debugcheck+0xb0/0x1e0
[ 226.312949] [<c01e215f>] copy_to_user+0x3f/0x70
[ 226.313020] [<c016d1ff>] cp_new_stat64+0xef/0x110
[ 226.313110] [<c01773b1>] sys_select+0x51/0x1c0
[ 226.313179] [<c0139b64>] trace_hardirqs_on+0x104/0x170
[ 226.313255] [<c0104026>] sysenter_past_esp+0x5f/0x99
[ 226.313336] =======================
[ 226.313380] kthreadd S 00000000 0 2 0
[ 226.313468] c1467fd0 00000082 00000002 00000000 c012dee2 00000246 c03a4ee0 00000584
[ 226.313686] c03a4efc 00000584 ded73c48 00000000 c012df3c c012de40 00000000 00000000
[ 226.313936] c0104c23 00000000 00000000 00000000 00000000 00000000 00000000
[ 226.314163] Call Trace:
[ 226.314237] [<c012dee2>] kthreadd+0xa2/0x110
[ 226.314311] [<c012df3c>] kthreadd+0xfc/0x110
[ 226.314379] [<c012de40>] kthreadd+0x0/0x110
[ 226.314447] [<c0104c23>] kernel_thread_helper+0x7/0x14
[ 226.314521] =======================
[ 226.314564] ksoftirqd/0 S c0139b64 0 3 2
[ 226.314652] c146bfcc 00000082 00000000 c0139b64 00000001 c012038f c01205b6 00000246
[ 226.314869] 00000000 fffffffc c0120640 00000000 c0120688 c012de34 c012ddc0 00000000
[ 226.315118] 00000000 c0104c23 c1465f04 00000000 00000000 00000000 00000000 00000000
[ 226.315367] Call Trace:
[ 226.315441] [<c0139b64>] trace_hardirqs_on+0x104/0x170
[ 226.315512] [<c012038f>] _local_bh_enable+0x4f/0xf0
[ 226.315584] [<c01205b6>] __do_softirq+0x76/0xb0
[ 226.315654] [<c0120640>] ksoftirqd+0x0/0x90
[ 226.315721] [<c0120688>] ksoftirqd+0x48/0x90
[ 226.315788] [<c012de34>] kthread+0x74/0x80
[ 226.315855] [<c012ddc0>] kthread+0x0/0x80
[ 226.315923] [<c0104c23>] kernel_thread_helper+0x7/0x14
[ 226.315997] =======================
[ 226.316039] watchdog/0 S 00000073 0 4 2
[ 226.316127] c146ffc8 00000096 00000001 00000073 ffffffff 308b09e3 00000d34 00000000
[ 226.316345] 00000000 fffffffc c0147c60 00000000 c0147c97 00000063 c012de34 c012ddc0
[ 226.316595] 00000000 00000000 c0104c23 c1465f08 00000000 00000000 00000000 00000000
[ 226.316844] Call Trace:
[ 226.316922] [<c0147c60>] watchdog+0x0/0x50
[ 226.316992] [<c0147c97>] watchdog+0x37/0x50
[ 226.317061] [<c012de34>] kthread+0x74/0x80
[ 226.317128] [<c012ddc0>] kthread+0x0/0x80
[ 226.317196] [<c0104c23>] kernel_thread_helper+0x7/0x14
[ 226.317270] =======================
[ 226.317312] events/0 R running 0 5 2
[ 226.317400] khelper S 00000002 0 6 2
[ 226.317488] c1473fac 00000086 c0139b64 00000002 00000046 df789444 00000286 df789444
[ 226.317706] df789444 df789420 c012ae00 00000000 c012aed5 00000000 c146c070 c012e030
[ 226.317956] df789460 df789460 df789420 fffffffc c012ae00 c012de34 c012ddc0 00000000
[ 226.318205] Call Trace:
[ 226.318278] [<c0139b64>] trace_hardirqs_on+0x104/0x170
[ 226.318353] [<c012ae00>] worker_thread+0x0/0x100
[ 226.318422] [<c012aed5>] worker_thread+0xd5/0x100
[ 226.318491] [<c012e030>] autoremove_wake_function+0x0/0x50
[ 226.318566] [<c012ae00>] worker_thread+0x0/0x100
[ 226.318633] [<c012de34>] kthread+0x74/0x80
[ 226.318701] [<c012ddc0>] kthread+0x0/0x80
[ 226.318769] [<c0104c23>] kernel_thread_helper+0x7/0x14
[ 226.318843] =======================
[ 226.318885] kblockd/0 S 00000002 0 35 2
[ 226.318973] df751fac 00000086 c0139b64 00000002 00000046 c03c3ec0 00000286 df706e5c
[ 226.319191] df706e5c df706e38 c012ae00 00000000 c012aed5 00000000 df748a90 c012e030
[ 226.319440] df706e78 df706e78 df706e38 fffffffc c012ae00 c012de34 c012ddc0 00000000
[ 226.319690] Call Trace:
[ 226.319764] [<c0139b64>] trace_hardirqs_on+0x104/0x170
[ 226.319840] [<c012ae00>] worker_thread+0x0/0x100
[ 226.319909] [<c012aed5>] worker_thread+0xd5/0x100
[ 226.319978] [<c012e030>] autoremove_wake_function+0x0/0x50
[ 226.320051] [<c012ae00>] worker_thread+0x0/0x100
[ 226.320120] [<c012de34>] kthread+0x74/0x80
[ 226.320187] [<c012ddc0>] kthread+0x0/0x80
[ 226.320255] [<c0104c23>] kernel_thread_helper+0x7/0x14
[ 226.320329] =======================
[ 226.320372] kacpid S 00000002 0 38 2
[ 226.320459] df759fac 00000086 c0139b64 00000002 00000046 df706a34 00000286 df706a34
[ 226.320677] df706a34 df706a10 c012ae00 00000000 c012aed5 00000000 df754ad0 c012e030
[ 226.320927] df706a50 df706a50 df706a10 fffffffc c012ae00 c012de34 c012ddc0 00000000
[ 226.321177] Call Trace:
[ 226.321251] [<c0139b64>] trace_hardirqs_on+0x104/0x170
[ 226.321326] [<c012ae00>] worker_thread+0x0/0x100
[ 226.321395] [<c012aed5>] worker_thread+0xd5/0x100
[ 226.321465] [<c012e030>] autoremove_wake_function+0x0/0x50
[ 226.321538] [<c012ae00>] worker_thread+0x0/0x100
[ 226.321606] [<c012de34>] kthread+0x74/0x80
[ 226.321673] [<c012ddc0>] kthread+0x0/0x80
[ 226.321741] [<c0104c23>] kernel_thread_helper+0x7/0x14
[ 226.321814] =======================
[ 226.321857] kacpi_notify S 00000002 0 39 2
[ 226.321945] df75bfac 00000086 c0139b64 00000002 00000046 df70e99c 00000286 df70e99c
[ 226.322162] df70e99c df70e978 c012ae00 00000000 c012aed5 00000000 df754070 c012e030
[ 226.322412] df70e9b8 df70e9b8 df70e978 fffffffc c012ae00 c012de34 c012ddc0 00000000
[ 226.322662] Call Trace:
[ 226.322735] [<c0139b64>] trace_hardirqs_on+0x104/0x170
[ 226.322810] [<c012ae00>] worker_thread+0x0/0x100
[ 226.322879] [<c012aed5>] worker_thread+0xd5/0x100
[ 226.322948] [<c012e030>] autoremove_wake_function+0x0/0x50
[ 226.323022] [<c012ae00>] worker_thread+0x0/0x100
[ 226.323090] [<c012de34>] kthread+0x74/0x80
[ 226.323157] [<c012ddc0>] kthread+0x0/0x80
[ 226.323226] [<c0104c23>] kernel_thread_helper+0x7/0x14
[ 226.324145] =======================
[ 226.324188] kseriod S 00000002 0 159 2
[ 226.324276] c14bdf98 00000092 c0139b64 00000002 00000046 c03b8f80 00000286 c03b8f80
[ 226.324493] 00000000 00000000 00000000 00000000 c0269674 c02eb320 00000002 c02e87ff
[ 226.324742] 00000000 00000000 df720070 c012e030 c03b8f9c c03b8f9c 00000000 fffffffc
[ 226.324992] Call Trace:
[ 226.325065] [<c0139b64>] trace_hardirqs_on+0x104/0x170
[ 226.325142] [<c0269674>] serio_thread+0x204/0x330
[ 226.325213] [<c02eb320>] _spin_unlock_irq+0x20/0x30
[ 226.325285] [<c02e87ff>] schedule+0x1af/0x340
[ 226.325355] [<c012e030>] autoremove_wake_function+0x0/0x50
[ 226.325430] [<c0269470>] serio_thread+0x0/0x330
[ 226.325500] [<c012de34>] kthread+0x74/0x80
[ 226.325567] [<c012ddc0>] kthread+0x0/0x80
[ 226.325635] [<c0104c23>] kernel_thread_helper+0x7/0x14
[ 226.325709] =======================
[ 226.325751] rt-test-0 S 00000046 0 184 2
[ 226.325839] c14e9fc8 00000096 c011cfe8 00000046 df71857c fffffffc df71857c fffffffc
[ 226.326056] c0621f00 fffffffc c013e250 00000000 c013e2c8 c0621f00 c012de34 c012ddc0
[ 226.326306] 00000000 00000000 c0104c23 c1465efc 00000000 00000000 00000000 00000000
[ 226.326555] Call Trace:
[ 226.326629] [<c011cfe8>] allow_signal+0x28/0x80
[ 226.326703] [<c013e250>] test_func+0x0/0xb0
[ 226.326773] [<c013e2c8>] test_func+0x78/0xb0
[ 226.326842] [<c012de34>] kthread+0x74/0x80
[ 226.326909] [<c012ddc0>] kthread+0x0/0x80
[ 226.326978] [<c0104c23>] kernel_thread_helper+0x7/0x14
[ 226.327051] =======================
[ 226.327094] rt-test-1 S 00000046 0 186 2
[ 226.327182] c14effc8 00000096 c011cfe8 00000046 c14edb3c fffffffc c14edb3c fffffffc
[ 226.327400] c0621f90 fffffffc c013e250 00000000 c013e2c8 c0621f90 c012de34 c012ddc0
[ 226.327649] 00000000 00000000 c0104c23 c1465efc 00000000 00000000 00000000 00000000
[ 226.327899] Call Trace:
[ 226.327972] [<c011cfe8>] allow_signal+0x28/0x80
[ 226.328046] [<c013e250>] test_func+0x0/0xb0
[ 226.328115] [<c013e2c8>] test_func+0x78/0xb0
[ 226.328184] [<c012de34>] kthread+0x74/0x80
[ 226.328252] [<c012ddc0>] kthread+0x0/0x80
[ 226.328319] [<c0104c23>] kernel_thread_helper+0x7/0x14
[ 226.328392] =======================
[ 226.328435] rt-test-2 S 00000046 0 188 2
[ 226.328522] c14f3fc8 00000096 c011cfe8 00000046 c14ed5dc fffffffc c14ed5dc fffffffc
[ 226.328740] c0622020 fffffffc c013e250 00000000 c013e2c8 c0622020 c012de34 c012ddc0
[ 226.328990] 00000000 00000000 c0104c23 c1465efc 00000000 00000000 00000000 00000000
[ 226.329239] Call Trace:
[ 226.329312] [<c011cfe8>] allow_signal+0x28/0x80
[ 226.329385] [<c013e250>] test_func+0x0/0xb0
[ 226.329453] [<c013e2c8>] test_func+0x78/0xb0
[ 226.329522] [<c012de34>] kthread+0x74/0x80
[ 226.329589] [<c012ddc0>] kthread+0x0/0x80
[ 226.329657] [<c0104c23>] kernel_thread_helper+0x7/0x14
[ 226.329730] =======================
[ 226.329772] rt-test-3 S 00000046 0 190 2
[ 226.329860] c14f7fc8 00000096 c011cfe8 00000046 c14ed07c fffffffc c14ed07c fffffffc
[ 226.330078] c06220b0 fffffffc c013e250 00000000 c013e2c8 c06220b0 c012de34 c012ddc0
[ 226.330347] 00000000 00000000 c0104c23 c1465efc 00000000 00000000 00000000 00000000
[ 226.330597] Call Trace:
[ 226.330670] [<c011cfe8>] allow_signal+0x28/0x80
[ 226.330744] [<c013e250>] test_func+0x0/0xb0
[ 226.330813] [<c013e2c8>] test_func+0x78/0xb0
[ 226.330882] [<c012de34>] kthread+0x74/0x80
[ 226.330949] [<c012ddc0>] kthread+0x0/0x80
[ 226.331017] [<c0104c23>] kernel_thread_helper+0x7/0x14
[ 226.331090] =======================
And So on for every task.
Thanks,
--
Ahmed S. Darwish
HomePage: http://darwish.07.googlepages.com
Blog: http://darwish-07.blogspot.com
On Sat, Oct 06, 2007 at 10:14:05PM +0200, ahmed wrote:
> Hi all,
>
> Pressing sysRq+T always produce an Oops for every running system task (94
> Oopses, that's a record ;)).
> The bug is 100% reproducable. Should I begin bisecting/investigating the
> issue or it's a known problem ?
>
Shame, This is not an Oops at all. Really sorry.
/me wondering about my look now posting a normal message as an Ooops a day
before the stable release :(.
--
Ahmed S. Darwish
HomePage: http://darwish.07.googlepages.com
Blog: http://darwish-07.blogspot.com
On Sat, Oct 06, 2007 at 10:14:06PM +0200, Ahmed S. Darwish wrote:
> Pressing sysRq+T always produce an Oops for every running system task (94
> Oopses, that's a record ;)).
uh-oh. For every sleeping task, I think.
> The bug is 100% reproducable. Should I begin bisecting/investigating the
> issue or it's a known problem ?
Start with some old kernel, like mmm.. 2.6.0. The fact that same behaviour
was present there may make you think about faulty assumptions you've
made.
> [ 226.309874] SysRq : Show State
> [ 226.309948] task PC stack pid father
> [ 226.310105] init S c1465b64 0 1 0
> [ 226.310195] c1465b54 00000082 00000286 c1465b64 c04255c0 c03c3ec0 00000000 00000286
> [ 226.310414] c1465b64 fffd689a 0000000b 00000000 c02e8fda c1537040 00000292 c0425ab4
> [ 226.310664] c0425ab4 fffd689a c0123cd0 c14634f0 c04255c0 00000800 c1465f9c c0176bf5
> [ 226.310914] Call Trace:
> [ 226.310995] [<c02e8fda>] schedule_timeout+0x4a/0xc0
On Sun, Oct 07, 2007 at 01:12:38AM +0400, Alexey Dobriyan wrote:
> On Sat, Oct 06, 2007 at 10:14:06PM +0200, Ahmed S. Darwish wrote:
> > Pressing sysRq+T always produce an Oops for every running system task (94
> > Oopses, that's a record ;)).
>
> uh-oh. For every sleeping task, I think.
>
> > The bug is 100% reproducable. Should I begin bisecting/investigating the
> > issue or it's a known problem ?
>
> Start with some old kernel, like mmm.. 2.6.0. The fact that same behaviour
> was present there may make you think about faulty assumptions you've
> made.
>
Yeah I understood my mistake (not an Oops, a normal behaviour).
Thanks for your advice :).
--
Ahmed S. Darwish
HomePage: http://darwish.07.googlepages.com
Blog: http://darwish-07.blogspot.com