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    SubjectRe: [3.4-rc3] Thread overran stack, or stack corrupted
    On Tue, Apr 17, 2012 at 06:36:00PM -0700, Linus Torvalds wrote:
    > On Tue, Apr 17, 2012 at 1:32 PM, Dave Jones <davej@redhat.com> wrote:
    > >
    > > Ok, this builds. I'll run with this for a while, and see what falls out.
    >
    > So assuming that works and doesn't have some silly thinko in it, I
    > think it is a worthwhile addition to the whole stack debugging thing.
    > Right now, the message about "process xyz used most stack, x bytes
    > free" really is pretty useless. If it were to actually show "hey, this
    > was the deepest actual stack chain", that sounds quite interesting.
    >
    > Of course, if the stack is largely used by some leaf function that
    > just has a big stack frame, that won't show up in the stack trace, but
    > that's presumably not the worst worry. And hopefully the caller of
    > that would still be pretty deep and show up without having been
    > overwritten.

    So now that I'm instrumenting it, it's taking a lot longer to trigger
    (how typical). Almost 6 hours in though, it's down to 72 bytes, and spewed
    the traces below, which look pretty.. deep.
    I'll leave it run overnight, to see if it triggers the 'overran stack' trace
    again, but I suspect it'll look very similar to the ones shown below.

    Dave


    [ 2496.639872] trinity used greatest stack depth: 1560 bytes left
    [ 3604.156895] trinity used greatest stack depth: 1352 bytes left
    [ 5448.499455] trinity used greatest stack depth: 1264 bytes left
    [ 9751.238389] trinity used greatest stack depth: 864 bytes left
    [15000.946998] trinity used greatest stack depth: 800 bytes left
    [15079.438172] trinity used greatest stack depth: 656 bytes left
    [21137.019557] trinity used greatest stack depth: 456 bytes left
    [21137.019982] Call Trace:
    [21137.020353] [<ffffffff8115a5d5>] ? mempool_alloc_slab+0x15/0x20
    [21137.020765] [<ffffffff8115a5d5>] ? mempool_alloc_slab+0x15/0x20
    [21137.021718] [<ffffffff8108ba29>] ? debug_lockdep_rcu_enabled+0x9/0x40
    [21137.022231] [<ffffffff810de7b0>] ? __module_address+0x10/0x160
    [21137.023327] [<ffffffff811a9eae>] ? deactivate_slab+0x3ce/0x5f0
    [21137.023954] [<ffffffff8108c230>] ? __kernel_text_address+0x60/0x90
    [21137.024989] [<ffffffff8101e861>] ? print_context_stack+0x81/0x140
    [21137.025704] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21137.026157] [<ffffffff816aeca5>] ? _raw_spin_unlock+0x35/0x60
    [21137.027200] [<ffffffff811aa02c>] ? deactivate_slab+0x54c/0x5f0
    [21137.027710] [<ffffffff8115a5d5>] ? mempool_alloc_slab+0x15/0x20
    [21137.028708] [<ffffffff8115a5d5>] ? mempool_alloc_slab+0x15/0x20
    [21137.029558] [<ffffffff8115a5d5>] ? mempool_alloc_slab+0x15/0x20
    [21137.030053] [<ffffffff811a7fcc>] ? set_track+0xac/0x1a0
    [21137.031017] [<ffffffff8115a5d5>] ? mempool_alloc_slab+0x15/0x20
    [21137.031669] [<ffffffff810a847a>] ? cpuacct_charge+0x2a/0x240
    [21137.032782] [<ffffffff8109c04f>] ? finish_task_switch+0x3f/0x120
    [21137.033295] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21137.033967] [<ffffffff816aebb1>] ? _raw_spin_unlock_irq+0x41/0x70
    [21137.035386] [<ffffffff8108ba29>] ? debug_lockdep_rcu_enabled+0x9/0x40
    [21137.035872] [<ffffffff810de7b0>] ? __module_address+0x10/0x160
    [21137.036376] [<ffffffff8108ba29>] ? debug_lockdep_rcu_enabled+0x9/0x40
    [21137.037401] [<ffffffff810de7b0>] ? __module_address+0x10/0x160
    [21137.039119] [<ffffffff811a9eae>] ? deactivate_slab+0x3ce/0x5f0
    [21137.040116] [<ffffffff8108c230>] ? __kernel_text_address+0x60/0x90
    [21137.041752] [<ffffffff8101e861>] ? print_context_stack+0x81/0x140
    [21137.042494] [<ffffffff810a2981>] ? get_parent_ip+0x11/0x50
    [21137.043751] [<ffffffff816b30ad>] ? sub_preempt_count+0x9d/0xd0
    [21137.044302] [<ffffffff816aeca5>] ? _raw_spin_unlock+0x35/0x60
    [21137.044796] [<ffffffff811aa02c>] ? deactivate_slab+0x54c/0x5f0
    [21137.045883] [<ffffffffa037d202>] ? alloc_extent_state+0x32/0x1c0 [btrfs]
    [21137.046391] [<ffffffffa037d202>] ? alloc_extent_state+0x32/0x1c0 [btrfs]
    [21137.046838] [<ffffffffa037d202>] ? alloc_extent_state+0x32/0x1c0 [btrfs]
    [21137.047369] [<ffffffff811a7fcc>] ? set_track+0xac/0x1a0
    [21137.048232] [<ffffffffa037d202>] ? alloc_extent_state+0x32/0x1c0 [btrfs]
    [21137.049577] [<ffffffff8108ba29>] ? debug_lockdep_rcu_enabled+0x9/0x40
    [21137.050115] [<ffffffff810de7b0>] ? __module_address+0x10/0x160
    [21137.050879] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21137.051399] [<ffffffff8108ba29>] ? debug_lockdep_rcu_enabled+0x9/0x40
    [21137.052206] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21137.053551] [<ffffffff816ac00f>] ? __mutex_unlock_slowpath+0x14f/0x190
    [21137.054026] [<ffffffff8101e861>] ? print_context_stack+0x81/0x140
    [21137.055167] [<ffffffff816ac05e>] ? mutex_unlock+0xe/0x10
    [21137.055655] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21137.056156] [<ffffffff81380165>] ? bit_putcs+0x2e5/0x560
    [21137.057035] [<ffffffff814ae4cc>] ? qtd_fill+0xc/0xc0
    [21137.058041] [<ffffffff816ac05e>] ? mutex_unlock+0xe/0x10
    [21137.058644] [<ffffffff814b5609>] ? qh_append_tds+0xf9/0x690
    [21137.059789] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21137.060326] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21137.061115] [<ffffffff816aec5e>] ? _raw_spin_unlock_irqrestore+0x7e/0x90
    [21137.062180] [<ffffffff816ac00f>] ? __mutex_unlock_slowpath+0x14f/0x190
    [21137.062731] [<ffffffff81050869>] ? __phys_addr+0x9/0x50
    [21137.063832] [<ffffffff81345fb8>] ? swiotlb_dma_mapping_error+0x18/0x30
    [21137.064337] [<ffffffff81499101>] ? usb_hcd_map_urb_for_dma+0x531/0x5b0
    [21137.065074] [<ffffffff813806be>] ? soft_cursor+0x1ce/0x270
    [21137.065919] [<ffffffffa00c73d2>] ? nouveau_fbcon_fillrect+0xc2/0x110 [nouveau]
    [21137.066758] [<ffffffff8149922f>] ? usb_hcd_submit_urb+0xaf/0x860
    [21137.068183] [<ffffffff8137fe3b>] ? bit_cursor+0x60b/0x650
    [21137.068702] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21137.069802] [<ffffffff816aec5e>] ? _raw_spin_unlock_irqrestore+0x7e/0x90
    [21137.070531] [<ffffffff814d336e>] ? usb_serial_generic_write_start+0x22e/0x270
    [21137.071113] [<ffffffff81090667>] ? kfifo_copy_in+0x77/0x90
    [21137.071588] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21137.072813] [<ffffffff814d3664>] ? usb_serial_generic_write+0x84/0xd0
    [21137.073346] [<ffffffff814d4220>] ? usb_console_write+0x110/0x250
    [21137.074210] [<ffffffff81335fae>] ? trace_hardirqs_on_thunk+0x3a/0x3f
    [21137.075545] [<ffffffff816af5b4>] ? retint_restore_args+0x13/0x13
    [21137.076036] [<ffffffff81066ed9>] ? vprintk+0x389/0x600
    [21137.076738] [<ffffffff810d375d>] ? trace_hardirqs_on+0xd/0x10
    [21137.078066] [<ffffffff810d375d>] ? trace_hardirqs_on+0xd/0x10
    [21137.078542] [<ffffffff810d375d>] ? trace_hardirqs_on+0xd/0x10
    [21137.079263] [<ffffffff816a1b67>] ? printk+0x51/0x53
    [21137.080295] [<ffffffff810de7b0>] ? __module_address+0x10/0x160
    [21137.080839] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21137.082013] [<ffffffff810e3145>] ? is_module_text_address+0x55/0x60
    [21137.082566] [<ffffffff8108c230>] ? __kernel_text_address+0x60/0x90
    [21137.083458] [<ffffffff8101e861>] ? print_context_stack+0x81/0x140
    [21137.084787] [<ffffffff8101d54f>] ? dump_trace+0x17f/0x2f0
    [21137.085246] [<ffffffff8101ea0c>] show_trace_log_lvl+0x5c/0x80
    [21137.085962] [<ffffffff8101ea45>] show_trace+0x15/0x20
    [21137.087188] [<ffffffff8106bbaf>] do_exit+0xb7f/0xb90
    [21137.087629] [<ffffffff8106bf0f>] do_group_exit+0x4f/0xc0
    [21137.088388] [<ffffffff8107eade>] get_signal_to_deliver+0x20e/0x880
    [21137.089757] [<ffffffff8107bdb0>] ? __send_signal+0x150/0x7f0
    [21137.090202] [<ffffffff811177de>] ? __rcu_read_unlock+0xe/0xa0
    [21137.091126] [<ffffffff8108b830>] ? task_tgid_nr_ns+0x20/0x20
    [21137.091701] [<ffffffff8101b315>] do_signal+0x65/0x5d0
    [21137.092560] [<ffffffff816aebb1>] ? _raw_spin_unlock_irq+0x41/0x70
    [21137.094242] [<ffffffff8107f322>] ? set_current_blocked+0x52/0x60
    [21137.095524] [<ffffffff81335fae>] ? trace_hardirqs_on_thunk+0x3a/0x3f
    [21137.096777] [<ffffffff816aebb1>] ? _raw_spin_unlock_irq+0x41/0x70
    [21137.098541] [<ffffffff8101b905>] do_notify_resume+0x65/0x80
    [21137.099113] [<ffffffff81335fae>] ? trace_hardirqs_on_thunk+0x3a/0x3f
    [21137.099686] [<ffffffff816b73a2>] int_signal+0x12/0x17
    [21162.880562] trinity used greatest stack depth: 280 bytes left
    [21162.881249] Call Trace:
    [21162.883712] [<ffffffff811605d4>] ? free_pages_prepare+0x1b4/0x290
    [21162.884545] [<ffffffff811b8e20>] ? mem_cgroup_recursive_stat+0x70/0x70
    [21162.885217] [<ffffffff810d375d>] ? trace_hardirqs_on+0xd/0x10
    [21162.885673] [<ffffffff8108ba29>] ? debug_lockdep_rcu_enabled+0x9/0x40
    [21162.886320] [<ffffffff810de7b0>] ? __module_address+0x10/0x160
    [21162.887113] [<ffffffff8108ba29>] ? debug_lockdep_rcu_enabled+0x9/0x40
    [21162.887736] [<ffffffff810de7b0>] ? __module_address+0x10/0x160
    [21162.888600] [<ffffffff811a9eae>] ? deactivate_slab+0x3ce/0x5f0
    [21162.889674] [<ffffffff8108c230>] ? __kernel_text_address+0x60/0x90
    [21162.890501] [<ffffffff8101e861>] ? print_context_stack+0x81/0x140
    [21162.891421] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21162.892022] [<ffffffff816aeca5>] ? _raw_spin_unlock+0x35/0x60
    [21162.893069] [<ffffffff811aa02c>] ? deactivate_slab+0x54c/0x5f0
    [21162.893717] [<ffffffff8115a5d5>] ? mempool_alloc_slab+0x15/0x20
    [21162.895053] [<ffffffff8115a5d5>] ? mempool_alloc_slab+0x15/0x20
    [21162.895490] [<ffffffff8115a5d5>] ? mempool_alloc_slab+0x15/0x20
    [21162.896200] [<ffffffff811a7fcc>] ? set_track+0xac/0x1a0
    [21162.897624] [<ffffffff8115a5d5>] ? mempool_alloc_slab+0x15/0x20
    [21162.898462] [<ffffffff8108ba29>] ? debug_lockdep_rcu_enabled+0x9/0x40
    [21162.899162] [<ffffffff810de7b0>] ? __module_address+0x10/0x160
    [21162.899775] [<ffffffff811a9eae>] ? deactivate_slab+0x3ce/0x5f0
    [21162.900428] [<ffffffff8108c230>] ? __kernel_text_address+0x60/0x90
    [21162.901518] [<ffffffff8101e861>] ? print_context_stack+0x81/0x140
    [21162.902104] [<ffffffff810a2981>] ? get_parent_ip+0x11/0x50
    [21162.902917] [<ffffffff816b30ad>] ? sub_preempt_count+0x9d/0xd0
    [21162.904239] [<ffffffff816aeca5>] ? _raw_spin_unlock+0x35/0x60
    [21162.904675] [<ffffffff811aa02c>] ? deactivate_slab+0x54c/0x5f0
    [21162.905402] [<ffffffff8115a5d5>] ? mempool_alloc_slab+0x15/0x20
    [21162.906195] [<ffffffff8115a5d5>] ? mempool_alloc_slab+0x15/0x20
    [21162.907352] [<ffffffff8108ba29>] ? debug_lockdep_rcu_enabled+0x9/0x40
    [21162.907863] [<ffffffff810de7b0>] ? __module_address+0x10/0x160
    [21162.908965] [<ffffffff811a9eae>] ? deactivate_slab+0x3ce/0x5f0
    [21162.909507] [<ffffffff8108c230>] ? __kernel_text_address+0x60/0x90
    [21162.910322] [<ffffffff8101e861>] ? print_context_stack+0x81/0x140
    [21162.911307] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21162.911875] [<ffffffff816aeca5>] ? _raw_spin_unlock+0x35/0x60
    [21162.912953] [<ffffffff811aa02c>] ? deactivate_slab+0x54c/0x5f0
    [21162.913528] [<ffffffff8115a5d5>] ? mempool_alloc_slab+0x15/0x20
    [21162.914363] [<ffffffff8115a5d5>] ? mempool_alloc_slab+0x15/0x20
    [21162.915689] [<ffffffff8115a5d5>] ? mempool_alloc_slab+0x15/0x20
    [21162.916138] [<ffffffff811a7fcc>] ? set_track+0xac/0x1a0
    [21162.916812] [<ffffffff8115a5d5>] ? mempool_alloc_slab+0x15/0x20
    [21162.918125] [<ffffffff810de7b0>] ? __module_address+0x10/0x160
    [21162.918571] [<ffffffff810ccf2d>] ? trace_hardirqs_off+0xd/0x10
    [21162.919272] [<ffffffff811a9eae>] ? deactivate_slab+0x3ce/0x5f0
    [21162.920287] [<ffffffff8108c230>] ? __kernel_text_address+0x60/0x90
    [21162.920898] [<ffffffff8101e861>] ? print_context_stack+0x81/0x140
    [21162.921917] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21162.922564] [<ffffffff816aeca5>] ? _raw_spin_unlock+0x35/0x60
    [21162.923857] [<ffffffff811aa02c>] ? deactivate_slab+0x54c/0x5f0
    [21162.924318] [<ffffffff8115a5d5>] ? mempool_alloc_slab+0x15/0x20
    [21162.925040] [<ffffffff8115a5d5>] ? mempool_alloc_slab+0x15/0x20
    [21162.926251] [<ffffffff8115a5d5>] ? mempool_alloc_slab+0x15/0x20
    [21162.926741] [<ffffffff811a7fcc>] ? set_track+0xac/0x1a0
    [21162.927492] [<ffffffff8115a5d5>] ? mempool_alloc_slab+0x15/0x20
    [21162.928929] [<ffffffff8108ba29>] ? debug_lockdep_rcu_enabled+0x9/0x40
    [21162.929416] [<ffffffff810de7b0>] ? __module_address+0x10/0x160
    [21162.930157] [<ffffffff8143d66a>] ? scsi_pool_alloc_command+0x4a/0x80
    [21162.930697] [<ffffffff8108ba29>] ? debug_lockdep_rcu_enabled+0x9/0x40
    [21162.931644] [<ffffffff810de7b0>] ? __module_address+0x10/0x160
    [21162.932587] [<ffffffff811a9eae>] ? deactivate_slab+0x3ce/0x5f0
    [21162.933116] [<ffffffff8108c230>] ? __kernel_text_address+0x60/0x90
    [21162.934177] [<ffffffff8101e861>] ? print_context_stack+0x81/0x140
    [21162.934712] [<ffffffff810a2981>] ? get_parent_ip+0x11/0x50
    [21162.935736] [<ffffffff816b30ad>] ? sub_preempt_count+0x9d/0xd0
    [21162.936318] [<ffffffff816aeca5>] ? _raw_spin_unlock+0x35/0x60
    [21162.937110] [<ffffffff811aa02c>] ? deactivate_slab+0x54c/0x5f0
    [21162.938422] [<ffffffffa037d202>] ? alloc_extent_state+0x32/0x1c0 [btrfs]
    [21162.938888] [<ffffffffa037d202>] ? alloc_extent_state+0x32/0x1c0 [btrfs]
    [21162.939999] [<ffffffffa037d202>] ? alloc_extent_state+0x32/0x1c0 [btrfs]
    [21162.940457] [<ffffffff811a7fcc>] ? set_track+0xac/0x1a0
    [21162.941461] [<ffffffffa037d202>] ? alloc_extent_state+0x32/0x1c0 [btrfs]
    [21162.941912] [<ffffffff8108ba29>] ? debug_lockdep_rcu_enabled+0x9/0x40
    [21162.942806] [<ffffffff810de7b0>] ? __module_address+0x10/0x160
    [21162.943406] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21162.944445] [<ffffffff8108ba29>] ? debug_lockdep_rcu_enabled+0x9/0x40
    [21162.944898] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21162.945692] [<ffffffff816aec5e>] ? _raw_spin_unlock_irqrestore+0x7e/0x90
    [21162.946692] [<ffffffff816ac00f>] ? __mutex_unlock_slowpath+0x14f/0x190
    [21162.947319] [<ffffffff8101e861>] ? print_context_stack+0x81/0x140
    [21162.948440] [<ffffffff816ac05e>] ? mutex_unlock+0xe/0x10
    [21162.948933] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21162.949744] [<ffffffff814ae4cc>] ? qtd_fill+0xc/0xc0
    [21162.950960] [<ffffffff816ac05e>] ? mutex_unlock+0xe/0x10
    [21162.951404] [<ffffffff814b5609>] ? qh_append_tds+0xf9/0x690
    [21162.952143] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21162.953576] [<ffffffffa00a5e86>] ? nouveau_dma_wait+0x16/0x5b0 [nouveau]
    [21162.954397] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21162.955171] [<ffffffff816aec5e>] ? _raw_spin_unlock_irqrestore+0x7e/0x90
    [21162.955803] [<ffffffff816ac00f>] ? __mutex_unlock_slowpath+0x14f/0x190
    [21162.956249] [<ffffffffa00c7180>] ? nouveau_fbcon_imageblit+0x90/0x110 [nouveau]
    [21162.957053] [<ffffffff81050869>] ? __phys_addr+0x9/0x50
    [21162.958037] [<ffffffff81345fb8>] ? swiotlb_dma_mapping_error+0x18/0x30
    [21162.958692] [<ffffffff81499101>] ? usb_hcd_map_urb_for_dma+0x531/0x5b0
    [21162.960092] [<ffffffffa00c73d2>] ? nouveau_fbcon_fillrect+0xc2/0x110 [nouveau]
    [21162.961206] [<ffffffff8149922f>] ? usb_hcd_submit_urb+0xaf/0x860
    [21162.962185] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21162.962649] [<ffffffff816aec5e>] ? _raw_spin_unlock_irqrestore+0x7e/0x90
    [21162.963072] [<ffffffff814d336e>] ? usb_serial_generic_write_start+0x22e/0x270
    [21162.963640] [<ffffffff81090667>] ? kfifo_copy_in+0x77/0x90
    [21162.964801] [<ffffffff814d3664>] ? usb_serial_generic_write+0x84/0xd0
    [21162.965701] [<ffffffff814d4220>] ? usb_console_write+0x110/0x250
    [21162.966264] [<ffffffff81335fae>] ? trace_hardirqs_on_thunk+0x3a/0x3f
    [21162.967431] [<ffffffff816af5b4>] ? retint_restore_args+0x13/0x13
    [21162.967995] [<ffffffff816aec5e>] ? _raw_spin_unlock_irqrestore+0x7e/0x90
    [21162.969424] [<ffffffff81066ed9>] ? vprintk+0x389/0x600
    [21162.969877] [<ffffffff810d375d>] ? trace_hardirqs_on+0xd/0x10
    [21162.970836] [<ffffffff810d375d>] ? trace_hardirqs_on+0xd/0x10
    [21162.971524] [<ffffffff810d375d>] ? trace_hardirqs_on+0xd/0x10
    [21162.972502] [<ffffffff816a1b67>] ? printk+0x51/0x53
    [21162.973192] [<ffffffff810de7b0>] ? __module_address+0x10/0x160
    [21162.974558] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21162.975000] [<ffffffff810e3145>] ? is_module_text_address+0x55/0x60
    [21162.976554] [<ffffffff8108c230>] ? __kernel_text_address+0x60/0x90
    [21162.978461] [<ffffffff8101e861>] ? print_context_stack+0x81/0x140
    [21162.978907] [<ffffffff8101d54f>] ? dump_trace+0x17f/0x2f0
    [21162.979574] [<ffffffff8101ea0c>] show_trace_log_lvl+0x5c/0x80
    [21162.979977] [<ffffffff8101ea45>] show_trace+0x15/0x20
    [21162.980819] [<ffffffff8106bbaf>] do_exit+0xb7f/0xb90
    [21162.982280] [<ffffffff8106bf0f>] do_group_exit+0x4f/0xc0
    [21162.982729] [<ffffffff8107eade>] get_signal_to_deliver+0x20e/0x880
    [21162.983859] [<ffffffff8107bdb0>] ? __send_signal+0x150/0x7f0
    [21162.984789] [<ffffffff811177de>] ? __rcu_read_unlock+0xe/0xa0
    [21162.986147] [<ffffffff8108b830>] ? task_tgid_nr_ns+0x20/0x20
    [21162.986616] [<ffffffff8101b315>] do_signal+0x65/0x5d0
    [21162.987316] [<ffffffff816aebb1>] ? _raw_spin_unlock_irq+0x41/0x70
    [21162.987761] [<ffffffff8107f322>] ? set_current_blocked+0x52/0x60
    [21162.988680] [<ffffffff81335fae>] ? trace_hardirqs_on_thunk+0x3a/0x3f
    [21162.989521] [<ffffffff816aebb1>] ? _raw_spin_unlock_irq+0x41/0x70
    [21162.990238] [<ffffffff8101b905>] do_notify_resume+0x65/0x80
    [21162.991283] [<ffffffff81335fae>] ? trace_hardirqs_on_thunk+0x3a/0x3f
    [21162.992209] [<ffffffff816b73a2>] int_signal+0x12/0x17
    [21171.661403] trinity used greatest stack depth: 72 bytes left
    [21171.661978] Call Trace:
    [21171.662403] [<ffffffff8108c230>] ? __kernel_text_address+0x60/0x90
    [21171.663400] [<ffffffff8101e861>] ? print_context_stack+0x81/0x140
    [21171.663856] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21171.664895] [<ffffffff8101d559>] ? dump_trace+0x189/0x2f0
    [21171.665647] [<ffffffffa037d5aa>] ? free_extent_state+0x5a/0x1b0 [btrfs]
    [21171.666475] [<ffffffffa037d5aa>] ? free_extent_state+0x5a/0x1b0 [btrfs]
    [21171.667570] [<ffffffffa037d5aa>] ? free_extent_state+0x5a/0x1b0 [btrfs]
    [21171.668140] [<ffffffff810a2981>] ? get_parent_ip+0x11/0x50
    [21171.669035] [<ffffffff810a2981>] ? get_parent_ip+0x11/0x50
    [21171.670080] [<ffffffff810d375d>] ? trace_hardirqs_on+0xd/0x10
    [21171.670728] [<ffffffff8133db38>] ? debug_check_no_obj_freed+0x88/0x230
    [21171.671778] [<ffffffff810a2981>] ? get_parent_ip+0x11/0x50
    [21171.672654] [<ffffffff816b30ad>] ? sub_preempt_count+0x9d/0xd0
    [21171.673285] [<ffffffff816aec2a>] ? _raw_spin_unlock_irqrestore+0x4a/0x90
    [21171.674667] [<ffffffff8133dc2f>] ? debug_check_no_obj_freed+0x17f/0x230
    [21171.675138] [<ffffffff811605d4>] ? free_pages_prepare+0x1b4/0x290
    [21171.675722] [<ffffffff810d375d>] ? trace_hardirqs_on+0xd/0x10
    [21171.676895] [<ffffffff81160c0e>] ? free_hot_cold_page_list+0x5e/0x1a0
    [21171.677493] [<ffffffff811bd0be>] ? mem_cgroup_uncharge_cache_page+0x1e/0x30
    [21171.678457] [<ffffffff8116d2da>] ? shrink_page_list+0x69a/0xac0
    [21171.679757] [<ffffffffa0090205>] ? ttm_dma_pool_mm_shrink+0x105/0x190 [ttm]
    [21171.680287] [<ffffffff810a2981>] ? get_parent_ip+0x11/0x50
    [21171.680886] [<ffffffff816b30ad>] ? sub_preempt_count+0x9d/0xd0
    [21171.682085] [<ffffffff811c668d>] ? put_super+0x1d/0x40
    [21171.682662] [<ffffffffa0090205>] ? ttm_dma_pool_mm_shrink+0x105/0x190 [ttm]
    [21171.684097] [<ffffffff810a2981>] ? get_parent_ip+0x11/0x50
    [21171.684555] [<ffffffff816b30ad>] ? sub_preempt_count+0x9d/0xd0
    [21171.685408] [<ffffffff816aeca5>] ? _raw_spin_unlock+0x35/0x60
    [21171.685982] [<ffffffff811c66a1>] ? put_super+0x31/0x40
    [21171.687135] [<ffffffff8111d081>] ? delayacct_end+0x71/0xa0
    [21171.687675] [<ffffffff8108ba29>] ? debug_lockdep_rcu_enabled+0x9/0x40
    [21171.688548] [<ffffffff810de7b0>] ? __module_address+0x10/0x160
    [21171.689918] [<ffffffff811a9eae>] ? deactivate_slab+0x3ce/0x5f0
    [21171.690414] [<ffffffff8108c230>] ? __kernel_text_address+0x60/0x90
    [21171.690989] [<ffffffff8101e861>] ? print_context_stack+0x81/0x140
    [21171.691842] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21171.693212] [<ffffffff816aeca5>] ? _raw_spin_unlock+0x35/0x60
    [21171.693704] [<ffffffff811aa02c>] ? deactivate_slab+0x54c/0x5f0
    [21171.694509] [<ffffffff8108ba29>] ? debug_lockdep_rcu_enabled+0x9/0x40
    [21171.695534] [<ffffffff810de7b0>] ? __module_address+0x10/0x160
    [21171.696104] [<ffffffff811a9eae>] ? deactivate_slab+0x3ce/0x5f0
    [21171.697232] [<ffffffff8108c230>] ? __kernel_text_address+0x60/0x90
    [21171.697821] [<ffffffff8101e861>] ? print_context_stack+0x81/0x140
    [21171.699117] [<ffffffff810a2981>] ? get_parent_ip+0x11/0x50
    [21171.699618] [<ffffffff816b30ad>] ? sub_preempt_count+0x9d/0xd0
    [21171.700421] [<ffffffff816aeca5>] ? _raw_spin_unlock+0x35/0x60
    [21171.701746] [<ffffffff811aa02c>] ? deactivate_slab+0x54c/0x5f0
    [21171.702219] [<ffffffff8115a5d5>] ? mempool_alloc_slab+0x15/0x20
    [21171.703277] [<ffffffff8115a5d5>] ? mempool_alloc_slab+0x15/0x20
    [21171.703880] [<ffffffff8115a5d5>] ? mempool_alloc_slab+0x15/0x20
    [21171.704810] [<ffffffff811a7fcc>] ? set_track+0xac/0x1a0
    [21171.706108] [<ffffffff8115a5d5>] ? mempool_alloc_slab+0x15/0x20
    [21171.706581] [<ffffffff810d375d>] ? trace_hardirqs_on+0xd/0x10
    [21171.707560] [<ffffffff8115a5d5>] ? mempool_alloc_slab+0x15/0x20
    [21171.708156] [<ffffffff8108ba29>] ? debug_lockdep_rcu_enabled+0x9/0x40
    [21171.709302] [<ffffffff810de7b0>] ? __module_address+0x10/0x160
    [21171.709803] [<ffffffff811a9eae>] ? deactivate_slab+0x3ce/0x5f0
    [21171.710925] [<ffffffff8108c230>] ? __kernel_text_address+0x60/0x90
    [21171.711544] [<ffffffff8101e861>] ? print_context_stack+0x81/0x140
    [21171.712409] [<ffffffff810a2981>] ? get_parent_ip+0x11/0x50
    [21171.713734] [<ffffffff8108ba29>] ? debug_lockdep_rcu_enabled+0x9/0x40
    [21171.714231] [<ffffffff810de7b0>] ? __module_address+0x10/0x160
    [21171.715304] [<ffffffff8108ba29>] ? debug_lockdep_rcu_enabled+0x9/0x40
    [21171.716149] [<ffffffff810de7b0>] ? __module_address+0x10/0x160
    [21171.716902] [<ffffffff811a9eae>] ? deactivate_slab+0x3ce/0x5f0
    [21171.717513] [<ffffffff8108c230>] ? __kernel_text_address+0x60/0x90
    [21171.718660] [<ffffffff8101e861>] ? print_context_stack+0x81/0x140
    [21171.719208] [<ffffffff810a2981>] ? get_parent_ip+0x11/0x50
    [21171.720049] [<ffffffff816b30ad>] ? sub_preempt_count+0x9d/0xd0
    [21171.721357] [<ffffffff816aeca5>] ? _raw_spin_unlock+0x35/0x60
    [21171.721902] [<ffffffff811aa02c>] ? deactivate_slab+0x54c/0x5f0
    [21171.722939] [<ffffffffa03a312e>] ? btrfs_add_delayed_tree_ref+0x8e/0x1d0 [btrfs]
    [21171.723535] [<ffffffffa03a312e>] ? btrfs_add_delayed_tree_ref+0x8e/0x1d0 [btrfs]
    [21171.724412] [<ffffffffa03a312e>] ? btrfs_add_delayed_tree_ref+0x8e/0x1d0 [btrfs]
    [21171.725889] [<ffffffff811a7fcc>] ? set_track+0xac/0x1a0
    [21171.726373] [<ffffffffa03a312e>] ? btrfs_add_delayed_tree_ref+0x8e/0x1d0 [btrfs]
    [21171.726906] [<ffffffff8108ba29>] ? debug_lockdep_rcu_enabled+0x9/0x40
    [21171.728478] [<ffffffff8133d384>] ? debug_object_activate+0x84/0x1a0
    [21171.729179] [<ffffffff8133cf32>] ? __debug_object_init+0xa2/0x410
    [21171.729714] [<ffffffff8133d9d7>] ? debug_object_active_state+0x67/0x140
    [21171.730938] [<ffffffff811630fb>] ? __set_page_dirty_nobuffers+0x7b/0x1a0
    [21171.731420] [<ffffffff8109c04f>] ? finish_task_switch+0x3f/0x120
    [21171.732387] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21171.732991] [<ffffffff816aebb1>] ? _raw_spin_unlock_irq+0x41/0x70
    [21171.734109] [<ffffffff8109c08c>] ? finish_task_switch+0x7c/0x120
    [21171.734748] [<ffffffff8109c04f>] ? finish_task_switch+0x3f/0x120
    [21171.735648] [<ffffffff8108ba29>] ? debug_lockdep_rcu_enabled+0x9/0x40
    [21171.737086] [<ffffffff810de7b0>] ? __module_address+0x10/0x160
    [21171.737554] [<ffffffff8108ba29>] ? debug_lockdep_rcu_enabled+0x9/0x40
    [21171.738120] [<ffffffff810de7b0>] ? __module_address+0x10/0x160
    [21171.739435] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21171.739889] [<ffffffff810e3123>] ? is_module_text_address+0x33/0x60
    [21171.740964] [<ffffffff8108c230>] ? __kernel_text_address+0x60/0x90
    [21171.741509] [<ffffffff8101e861>] ? print_context_stack+0x81/0x140
    [21171.742293] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21171.743706] [<ffffffff8101d559>] ? dump_trace+0x189/0x2f0
    [21171.744207] [<ffffffffa037d5aa>] ? free_extent_state+0x5a/0x1b0 [btrfs]
    [21171.744857] [<ffffffffa037d5aa>] ? free_extent_state+0x5a/0x1b0 [btrfs]
    [21171.746371] [<ffffffffa037d5aa>] ? free_extent_state+0x5a/0x1b0 [btrfs]
    [21171.746883] [<ffffffff811a7fcc>] ? set_track+0xac/0x1a0
    [21171.747827] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21171.748485] [<ffffffff810d375d>] ? trace_hardirqs_on+0xd/0x10
    [21171.749276] [<ffffffff8108ba29>] ? debug_lockdep_rcu_enabled+0x9/0x40
    [21171.749859] [<ffffffff810de7b0>] ? __module_address+0x10/0x160
    [21171.750886] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21171.751523] [<ffffffff8108ba29>] ? debug_lockdep_rcu_enabled+0x9/0x40
    [21171.752646] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21171.753201] [<ffffffff816aec5e>] ? _raw_spin_unlock_irqrestore+0x7e/0x90
    [21171.754044] [<ffffffff81198c0e>] ? dma_pool_alloc+0x22e/0x340
    [21171.755396] [<ffffffffa00c7180>] ? nouveau_fbcon_imageblit+0x90/0x110 [nouveau]
    [21171.755872] [<ffffffff8101e861>] ? print_context_stack+0x81/0x140
    [21171.756904] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21171.757514] [<ffffffff814ae4cc>] ? qtd_fill+0xc/0xc0
    [21171.758338] [<ffffffff814b5609>] ? qh_append_tds+0xf9/0x690
    [21171.759728] [<ffffffffa00a5e86>] ? nouveau_dma_wait+0x16/0x5b0 [nouveau]
    [21171.760393] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21171.761031] [<ffffffff816aec5e>] ? _raw_spin_unlock_irqrestore+0x7e/0x90
    [21171.762309] [<ffffffff816ac00f>] ? __mutex_unlock_slowpath+0x14f/0x190
    [21171.762794] [<ffffffff81050869>] ? __phys_addr+0x9/0x50
    [21171.763690] [<ffffffff81345fb8>] ? swiotlb_dma_mapping_error+0x18/0x30
    [21171.764358] [<ffffffff81499101>] ? usb_hcd_map_urb_for_dma+0x531/0x5b0
    [21171.765536] [<ffffffffa00c73d2>] ? nouveau_fbcon_fillrect+0xc2/0x110 [nouveau]
    [21171.766134] [<ffffffff8149922f>] ? usb_hcd_submit_urb+0xaf/0x860
    [21171.766992] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21171.768393] [<ffffffff816aec5e>] ? _raw_spin_unlock_irqrestore+0x7e/0x90
    [21171.768864] [<ffffffff814d336e>] ? usb_serial_generic_write_start+0x22e/0x270
    [21171.769721] [<ffffffff81090667>] ? kfifo_copy_in+0x77/0x90
    [21171.771230] [<ffffffff814d3664>] ? usb_serial_generic_write+0x84/0xd0
    [21171.771902] [<ffffffff814d4220>] ? usb_console_write+0x110/0x250
    [21171.772388] [<ffffffff81335fae>] ? trace_hardirqs_on_thunk+0x3a/0x3f
    [21171.773510] [<ffffffff816af5b4>] ? retint_restore_args+0x13/0x13
    [21171.774121] [<ffffffff81066ed9>] ? vprintk+0x389/0x600
    [21171.774964] [<ffffffff810d375d>] ? trace_hardirqs_on+0xd/0x10
    [21171.776294] [<ffffffff810d375d>] ? trace_hardirqs_on+0xd/0x10
    [21171.776891] [<ffffffff810d375d>] ? trace_hardirqs_on+0xd/0x10
    [21171.777601] [<ffffffff816a1b67>] ? printk+0x51/0x53
    [21171.779000] [<ffffffff810de7b0>] ? __module_address+0x10/0x160
    [21171.779666] [<ffffffff816b301e>] ? sub_preempt_count+0xe/0xd0
    [21171.780288] [<ffffffff810e3145>] ? is_module_text_address+0x55/0x60
    [21171.781622] [<ffffffff8108c230>] ? __kernel_text_address+0x60/0x90
    [21171.782202] [<ffffffff8101e861>] ? print_context_stack+0x81/0x140
    [21171.782763] [<ffffffff8101d54f>] ? dump_trace+0x17f/0x2f0
    [21171.784109] [<ffffffff8101ea0c>] show_trace_log_lvl+0x5c/0x80
    [21171.784571] [<ffffffff8101ea45>] show_trace+0x15/0x20
    [21171.785503] [<ffffffff8106bbaf>] do_exit+0xb7f/0xb90
    [21171.786201] [<ffffffff8106bf0f>] do_group_exit+0x4f/0xc0
    [21171.787277] [<ffffffff8107eade>] get_signal_to_deliver+0x20e/0x880
    [21171.787886] [<ffffffff8107bdb0>] ? __send_signal+0x150/0x7f0
    [21171.788749] [<ffffffff811177de>] ? __rcu_read_unlock+0xe/0xa0
    [21171.790075] [<ffffffff8108b830>] ? task_tgid_nr_ns+0x20/0x20
    [21171.790520] [<ffffffff8101b315>] do_signal+0x65/0x5d0
    [21171.791316] [<ffffffff816aebb1>] ? _raw_spin_unlock_irq+0x41/0x70
    [21171.792624] [<ffffffff8107f322>] ? set_current_blocked+0x52/0x60
    [21171.793206] [<ffffffff81335fae>] ? trace_hardirqs_on_thunk+0x3a/0x3f
    [21171.793784] [<ffffffff816aebb1>] ? _raw_spin_unlock_irq+0x41/0x70
    [21171.795181] [<ffffffff8101b905>] do_notify_resume+0x65/0x80
    [21171.795614] [<ffffffff81335fae>] ? trace_hardirqs_on_thunk+0x3a/0x3f
    [21171.796675] [<ffffffff816b73a2>] int_signal+0x12/0x17


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      Last update: 2012-04-18 22:37    [W:2.480 / U:0.672 seconds]
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