Re: tracing ring_buffer_resize oops.
From: Dave Jones
Date: Thu May 24 2012 - 13:22:28 EST
On Thu, May 24, 2012 at 12:19:58PM -0400, Steven Rostedt wrote:
> On Thu, 2012-05-24 at 12:01 -0400, Dave Jones wrote:
> > Hit this while trying to configure the irq-tracer.
> > I ran cat trace before doing a "echo 0 > tracing_on" by mistake.
> > Shot myself in the foot, but it still shouldn't oops.
> >
>
> Hi Dave,
>
> Thanks for reporting. Could you try this patch to see if it fixes it for
> you.
>
> http://groups.google.com/group/linux.kernel/msg/4294e8d564d66997?dmode=source
>
> Below is the patch again, as the one in the link has GPG tags that might
> screw with patch.
hmm, this time I didn't even get past 'echo irqsoff > current_tracer'
Dave
[ 1013.243754] BUG: unable to handle kernel NULL pointer dereference at 0000000000000002
[ 1013.272665] IP: [<ffff880145cc0000>] 0xffff880145cbffff
[ 1013.285186] PGD 1401b2067 PUD 14324c067 PMD 0
[ 1013.298832] Oops: 0010 [#1] PREEMPT SMP
[ 1013.310600] CPU 2
[ 1013.317904] Modules linked in: ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables crc32c_intel ghash_clmulni_intel microcode usb_debug serio_raw pcspkr iTCO_wdt i2c_i801 iTCO_vendor_support e1000e nfsd nfs_acl auth_rpcgss lockd sunrpc i915 video i2c_algo_bit drm_kms_helper drm i2c_core [last unloaded: scsi_wait_scan]
[ 1013.401848]
[ 1013.407399] Pid: 112, comm: kworker/2:1 Not tainted 3.4.0+ #30
[ 1013.437943] RIP: 8eb8:[<ffff88014630a000>] [<ffff88014630a000>] 0xffff880146309fff
[ 1013.459871] RSP: ffffffff8165e919:ffff88014780f408 EFLAGS: 00010046
[ 1013.477909] RAX: 0000000000000001 RBX: ffffffff81104020 RCX: 0000000000000000
[ 1013.499458] RDX: ffff880148008ea8 RSI: ffffffff8131ef40 RDI: ffffffff82203b20
[ 1013.521612] RBP: ffffffff81005751 R08: 0000000000000000 R09: 0000000000000000
[ 1013.543121] R10: ffffffff82cdc318 R11: 0000000000000000 R12: ffff880145cc0000
[ 1013.564614] R13: ffff880148008eb8 R14: 0000000000000002 R15: ffff88014780cb40
[ 1013.586108] FS: 0000000000000000(0000) GS:ffff880148000000(0000) knlGS:0000000000000000
[ 1013.609458] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 1013.627420] CR2: 0000000000000002 CR3: 0000000141f10000 CR4: 00000000001407e0
[ 1013.649051] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1013.670724] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 1013.692376] Process kworker/2:1 (pid: 112, threadinfo ffff88013fe0e000, task ffff88014020a6a0)
[ 1013.717028] Stack:
[ 1013.724131] ffff88014780f570 ffff880145cc0000 0000400000004000 0000000000000000
[ 1013.745918] cccccccccccccccc ffff88014780cca8 ffffffff811072bb ffffffff81651627
[ 1013.767870] ffffffff8118f8a7 ffffffff811072bb ffffffff81f2b6c5 ffffffff81f11bdb
[ 1013.790021] Call Trace:
[ 1013.800701] Code: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a <e7> d7 64 81 ff ff ff ff 01 00 00 00 00 00 00 00 65 d9 64 81 ff
[ 1013.861443] RIP [<ffff88014630a000>] 0xffff880146309fff
[ 1013.884466] RSP <ffff88014780f408>
[ 1013.901507] CR2: 0000000000000002
[ 1013.918628] ---[ end trace d0e6e5741aaf56ac ]---
[ 1013.940297] BUG: sleeping function called from invalid context at kernel/rwsem.c:20
[ 1013.972340] in_atomic(): 0, irqs_disabled(): 1, pid: 112, name: kworker/2:1
[ 1014.001470] INFO: lockdep is turned off.
[ 1014.021285] irq event stamp: 146784
[ 1014.039375] hardirqs last enabled at (146783): [<ffffffff8165b4f4>] paranoid_restore+0x10/0x66
[ 1014.074744] hardirqs last disabled at (146784): [<ffffffff8165b380>] int3+0x10/0x40
[ 1014.106164] softirqs last enabled at (146418): [<ffffffff81052054>] __do_softirq+0x144/0x3d0
[ 1014.141604] softirqs last disabled at (146407): [<ffffffff81663e4c>] call_softirq+0x1c/0x30
[ 1014.174829] Pid: 112, comm: kworker/2:1 Tainted: G D 3.4.0+ #30
[ 1014.204753] Call Trace:
[ 1014.220719] <#DB> [<ffffffff810b3eb0>] ? print_irqtrace_events+0xd0/0xe0
[ 1014.251033] [<ffffffff8107f5c0>] __might_sleep+0x140/0x1f0
[ 1014.276482] [<ffffffff81657fc6>] down_read+0x26/0x93
[ 1014.301499] [<ffffffff810624e4>] exit_signals+0x24/0x130
[ 1014.326264] [<ffffffff8104e95c>] do_exit+0xbc/0xb70
[ 1014.348709] [<ffffffff8104b8b3>] ? kmsg_dump+0x83/0x2b0
[ 1014.373726] [<ffffffff8164d5e3>] ? printk+0x61/0x63
[ 1014.396878] [<ffffffff8165c007>] oops_end+0x97/0xe0
[ 1014.420306] [<ffffffff8164cece>] no_context+0x258/0x283
[ 1014.446640] [<ffffffff8164d0bd>] __bad_area_nosemaphore+0x1c4/0x1e3
[ 1014.474615] [<ffffffff8164d0ef>] bad_area_nosemaphore+0x13/0x15
[ 1014.505249] [<ffffffff8165e540>] do_page_fault+0x3c0/0x4b0
[ 1014.531368] [<ffffffff8106f708>] ? __kernel_text_address+0x58/0x80
[ 1014.560247] [<ffffffff810057cf>] ? print_context_stack+0x8f/0xf0
[ 1014.589070] [<ffffffff810860f1>] ? get_parent_ip+0x11/0x50
[ 1014.614948] [<ffffffff8165b613>] ? error_sti+0x5/0x6
[ 1014.641105] [<ffffffff810b0b38>] ? trace_hardirqs_off_caller+0x28/0xc0
[ 1014.671882] [<ffffffff81005751>] ? print_context_stack+0x11/0xf0
[ 1014.700148] [<ffffffff8131ac5d>] ? trace_hardirqs_off_thunk+0x3a/0x3c
[ 1014.730928] [<ffffffff81005751>] ? print_context_stack+0x11/0xf0
[ 1014.759028] [<ffffffff8165b42f>] page_fault+0x1f/0x30
[ 1014.784924] [<ffffffff81005751>] ? print_context_stack+0x11/0xf0
[ 1014.812910] [<ffffffff81104020>] ? __add_hash_entry+0x90/0x90
[ 1014.840108] [<ffffffff8131ef40>] ? bsearch+0x60/0x90
[ 1014.864867] [<ffffffff81104020>] ? __add_hash_entry+0x90/0x90
[ 1014.891647] [<ffffffff8165e919>] ? sub_preempt_count+0x9/0xd0
[ 1014.918212] [<ffffffff8165b466>] ? paranoid_exit+0x6/0x1b
[ 1014.942506] [<ffffffff810b0b38>] ? trace_hardirqs_off_caller+0x28/0xc0
[ 1014.971053] [<ffffffff8131ac5d>] ? trace_hardirqs_off_thunk+0x3a/0x3c
[ 1014.999788] [<ffffffff81104020>] ? __add_hash_entry+0x90/0x90
[ 1015.026354] [<ffffffff8165e919>] ? sub_preempt_count+0x9/0xd0
[ 1015.052818] [<ffffffff8165b466>] ? paranoid_exit+0x6/0x1b
[ 1015.077099] [<ffffffff81005751>] ? print_context_stack+0x11/0xf0
[ 1015.103546] [<ffffffff8165e91e>] ? sub_preempt_count+0xe/0xd0
[ 1015.131390] <<EOE>>
[ 1015.145014] BUG: unable to handle kernel paging request at fffffffffffffff8
[ 1015.169954] IP: [<ffffffff81072ee1>] kthread_data+0x11/0x20
[ 1015.190713] PGD 1c0d067 PUD 1c0e067 PMD 0
[ 1015.207586] Oops: 0000 [#2] PREEMPT SMP
[ 1015.224452] CPU 2
[ 1015.236313] Modules linked in: ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables crc32c_intel ghash_clmulni_intel microcode usb_debug serio_raw pcspkr iTCO_wdt i2c_i801 iTCO_vendor_support e1000e nfsd nfs_acl auth_rpcgss lockd sunrpc i915 video i2c_algo_bit drm_kms_helper drm i2c_core [last unloaded: scsi_wait_scan]
[ 1015.339235]
[ 1015.349349] Pid: 112, comm: kworker/2:1 Tainted: G D 3.4.0+ #30
[ 1015.389489] RIP: 0010:[<ffffffff81072ee1>] [<ffffffff81072ee1>] kthread_data+0x11/0x20
[ 1015.419063] RSP: 0018:ffff880148008aa0 EFLAGS: 00010092
[ 1015.440762] RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000002
[ 1015.468267] RDX: ffffffff820a0940 RSI: 0000000000000002 RDI: ffff88014020a6a0
[ 1015.495782] RBP: ffff880148008ab8 R08: ffff88014020a710 R09: 0000000000000400
[ 1015.523231] R10: 0000000000000001 R11: 0000000000000000 R12: ffff8801481d3080
[ 1015.550722] R13: 0000000000000002 R14: ffff8801480086c0 R15: ffff88014020a690
[ 1015.578205] FS: 0000000000000000(0000) GS:ffff880148000000(0000) knlGS:0000000000000000
[ 1015.607725] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 1015.631370] CR2: fffffffffffffff8 CR3: 0000000141f10000 CR4: 00000000001407e0
[ 1015.658912] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1015.686428] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 1015.713990] Process kworker/2:1 (pid: 112, threadinfo ffff88013fe0e000, task ffff88014020a6a0)
[ 1015.744998] Stack:
[ 1015.756808] ffffffff8106d615 ffff880148008ab8 ffff88014020ac60 ffff880148008b38
[ 1015.784512] ffffffff81658ca8 ffff880148008ae8 ffffffff8165add2 ffff88014020a6a0
[ 1015.812232] ffff88013fe0ffd8 ffff88013fe0ffd8 ffff88013fe0ffd8 ffff880148008b18
[ 1015.839896] Call Trace:
[ 1015.853916] <#DB>
[ 1015.866497] [<ffffffff8106d615>] ? wq_worker_sleeping+0x15/0xa0
[ 1015.891848] [<ffffffff81658ca8>] __schedule+0x758/0x9d0
[ 1015.915078] [<ffffffff8165add2>] ? _raw_spin_unlock_irqrestore+0x42/0x80
[ 1015.942459] [<ffffffff81658fa9>] schedule+0x29/0x70
[ 1015.963674] [<ffffffff8104ef00>] do_exit+0x660/0xb70
[ 1015.987893] [<ffffffff8104b8b3>] ? kmsg_dump+0x83/0x2b0
[ 1016.011435] [<ffffffff8164d5e3>] ? printk+0x61/0x63
[ 1016.032614] [<ffffffff8165c007>] oops_end+0x97/0xe0
[ 1016.053714] [<ffffffff8164cece>] no_context+0x258/0x283
[ 1016.076944] [<ffffffff8164d0bd>] __bad_area_nosemaphore+0x1c4/0x1e3
[ 1016.102353] [<ffffffff8164d0ef>] bad_area_nosemaphore+0x13/0x15
[ 1016.127714] [<ffffffff8165e540>] do_page_fault+0x3c0/0x4b0
[ 1016.150977] [<ffffffff8106f708>] ? __kernel_text_address+0x58/0x80
[ 1016.176389] [<ffffffff810057cf>] ? print_context_stack+0x8f/0xf0
[ 1016.201792] [<ffffffff810860f1>] ? get_parent_ip+0x11/0x50
[ 1016.225106] [<ffffffff8165b613>] ? error_sti+0x5/0x6
[ 1016.248342] [<ffffffff810b0b38>] ? trace_hardirqs_off_caller+0x28/0xc0
[ 1016.275871] [<ffffffff81005751>] ? print_context_stack+0x11/0xf0
[ 1016.301182] [<ffffffff8131ac5d>] ? trace_hardirqs_off_thunk+0x3a/0x3c
[ 1016.328674] [<ffffffff81005751>] ? print_context_stack+0x11/0xf0
[ 1016.354020] [<ffffffff8165b42f>] page_fault+0x1f/0x30
[ 1016.377291] [<ffffffff81005751>] ? print_context_stack+0x11/0xf0
[ 1016.402573] [<ffffffff81104020>] ? __add_hash_entry+0x90/0x90
[ 1016.427845] [<ffffffff8131ef40>] ? bsearch+0x60/0x90
[ 1016.451031] [<ffffffff81104020>] ? __add_hash_entry+0x90/0x90
[ 1016.476310] [<ffffffff8165e919>] ? sub_preempt_count+0x9/0xd0
[ 1016.501673] [<ffffffff8165b466>] ? paranoid_exit+0x6/0x1b
[ 1016.524849] [<ffffffff810b0b38>] ? trace_hardirqs_off_caller+0x28/0xc0
[ 1016.552487] [<ffffffff8131ac5d>] ? trace_hardirqs_off_thunk+0x3a/0x3c
[ 1016.579892] [<ffffffff81104020>] ? __add_hash_entry+0x90/0x90
[ 1016.605229] [<ffffffff8165e919>] ? sub_preempt_count+0x9/0xd0
[ 1016.630546] [<ffffffff8165b466>] ? paranoid_exit+0x6/0x1b
[ 1016.653694] [<ffffffff81005751>] ? print_context_stack+0x11/0xf0
[ 1016.679048] [<ffffffff8165e91e>] ? sub_preempt_count+0xe/0xd0
[ 1016.704311] <<EOE>>
[ 1016.718280] Code: 81 e8 34 e9 03 00 85 c0 0f 85 6c fe ff ff eb a1 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 cc f7 f7 5e 00 48 8b 87 68 05 00 00 5d <48> 8b 40 f8 c3 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 cc d7
[ 1016.780403] RIP [<ffffffff81072ee1>] kthread_data+0x11/0x20
[ 1016.801375] RSP <ffff880148008aa0>
[ 1016.816881] CR2: fffffffffffffff8
[ 1016.832146] ---[ end trace d0e6e5741aaf56ad ]---
[ 1016.851464] Fixing recursive fault but reboot is needed!
[ 1034.086221] ------------[ cut here ]------------
[ 1034.095568] WARNING: at kernel/watchdog.c:241 watchdog_overflow_callback+0x9a/0xc0()
[ 1034.105026] Hardware name: 2012 Client Platform
[ 1034.114418] Watchdog detected hard LOCKUP on cpu 2
[ 1034.118880] Modules linked in: ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables crc32c_intel ghash_clmulni_intel microcode usb_debug serio_raw pcspkr iTCO_wdt i2c_i801 iTCO_vendor_support e1000e nfsd nfs_acl auth_rpcgss lockd sunrpc i915 video i2c_algo_bit drm_kms_helper drm i2c_core [last unloaded: scsi_wait_scan]
[ 1034.132195] Pid: 112, comm: kworker/2:1 Tainted: G D 3.4.0+ #30
[ 1034.136525] Call Trace:
[ 1034.140761] <NMI> [<ffffffff8104891f>] warn_slowpath_common+0x7f/0xc0
[ 1034.150641] [<ffffffff81048a16>] warn_slowpath_fmt+0x46/0x50
[ 1034.160462] [<ffffffff810f2689>] ? watchdog_overflow_callback+0x9/0xc0
[ 1034.170299] [<ffffffff810f2680>] ? touch_nmi_watchdog+0x90/0x90
[ 1034.180139] [<ffffffff810f271a>] watchdog_overflow_callback+0x9a/0xc0
[ 1034.189984] [<ffffffff81133d0d>] __perf_event_overflow+0x9d/0x310
[ 1034.199783] [<ffffffff81014385>] ? x86_perf_event_set_period+0xd5/0x150
[ 1034.209617] [<ffffffff81134f84>] perf_event_overflow+0x14/0x20
[ 1034.219422] [<ffffffff8101960f>] intel_pmu_handle_irq+0x18f/0x310
[ 1034.229257] [<ffffffff8165cc3d>] perf_event_nmi_handler+0x1d/0x20
[ 1034.239042] [<ffffffff8165c1fe>] nmi_handle.isra.2+0xae/0x1f0
[ 1034.248822] [<ffffffff8165c150>] ? __die+0x100/0x100
[ 1034.258550] [<ffffffff810fe40e>] ? rcu_nmi_enter+0xe/0x80
[ 1034.268345] [<ffffffff8165c458>] do_nmi+0x118/0x380
[ 1034.278104] [<ffffffff8165b7b2>] end_repeat_nmi+0x1a/0x1e
[ 1034.287916] [<ffffffff81319834>] ? delay_tsc+0x74/0xe0
[ 1034.297662] [<ffffffff81319834>] ? delay_tsc+0x74/0xe0
[ 1034.307432] [<ffffffff81319834>] ? delay_tsc+0x74/0xe0
[ 1034.317208] <<EOE>> <#DB> [<ffffffff8131971f>] __delay+0xf/0x20
[ 1034.326979] [<ffffffff81320d2e>] do_raw_spin_lock+0x7e/0x140
[ 1034.336743] [<ffffffff8165a236>] _raw_spin_lock_irq+0x66/0x80
[ 1034.340966] [<ffffffff8165863f>] ? __schedule+0xef/0x9d0
[ 1034.345181] [<ffffffff8165863f>] __schedule+0xef/0x9d0
[ 1034.349398] [<ffffffff81658fa9>] schedule+0x29/0x70
[ 1034.353579] [<ffffffff8104f301>] do_exit+0xa61/0xb70
[ 1034.357772] [<ffffffff8104b8b3>] ? kmsg_dump+0x83/0x2b0
[ 1034.361953] [<ffffffff8164d5e3>] ? printk+0x61/0x63
[ 1034.366148] [<ffffffff8165c007>] oops_end+0x97/0xe0
[ 1034.370331] [<ffffffff8164cece>] no_context+0x258/0x283
[ 1034.374540] [<ffffffff8164d0bd>] __bad_area_nosemaphore+0x1c4/0x1e3
[ 1034.384325] [<ffffffff8164d0ef>] bad_area_nosemaphore+0x13/0x15
[ 1034.394059] [<ffffffff8165e540>] do_page_fault+0x3c0/0x4b0
[ 1034.403809] [<ffffffff8118ea9f>] ? cmpxchg_double_slab.isra.40+0x13f/0x220
[ 1034.413576] [<ffffffff8165b613>] ? error_sti+0x5/0x6
[ 1034.423289] [<ffffffff810b0b38>] ? trace_hardirqs_off_caller+0x28/0xc0
[ 1034.433070] [<ffffffff8131ac5d>] ? trace_hardirqs_off_thunk+0x3a/0x3c
[ 1034.442850] [<ffffffff8165b42f>] page_fault+0x1f/0x30
[ 1034.452588] [<ffffffff81072ee1>] ? kthread_data+0x11/0x20
[ 1034.462311] [<ffffffff8106d615>] ? wq_worker_sleeping+0x15/0xa0
[ 1034.472070] [<ffffffff81658ca8>] __schedule+0x758/0x9d0
[ 1034.481826] [<ffffffff8165add2>] ? _raw_spin_unlock_irqrestore+0x42/0x80
[ 1034.491606] [<ffffffff81658fa9>] schedule+0x29/0x70
[ 1034.495794] [<ffffffff8104ef00>] do_exit+0x660/0xb70
[ 1034.499982] [<ffffffff8104b8b3>] ? kmsg_dump+0x83/0x2b0
[ 1034.504171] [<ffffffff8164d5e3>] ? printk+0x61/0x63
[ 1034.508381] [<ffffffff8165c007>] oops_end+0x97/0xe0
[ 1034.518107] [<ffffffff8164cece>] no_context+0x258/0x283
[ 1034.527863] [<ffffffff8164d0bd>] __bad_area_nosemaphore+0x1c4/0x1e3
[ 1034.537539] [<ffffffff8164d0ef>] bad_area_nosemaphore+0x13/0x15
[ 1034.541512] [<ffffffff8165e540>] do_page_fault+0x3c0/0x4b0
[ 1034.545475] [<ffffffff8106f708>] ? __kernel_text_address+0x58/0x80
[ 1034.549465] [<ffffffff810057cf>] ? print_context_stack+0x8f/0xf0
[ 1034.553452] [<ffffffff810860f1>] ? get_parent_ip+0x11/0x50
[ 1034.562960] [<ffffffff8165b613>] ? error_sti+0x5/0x6
[ 1034.572446] [<ffffffff810b0b38>] ? trace_hardirqs_off_caller+0x28/0xc0
[ 1034.581996] [<ffffffff81005751>] ? print_context_stack+0x11/0xf0
[ 1034.591538] [<ffffffff8131ac5d>] ? trace_hardirqs_off_thunk+0x3a/0x3c
[ 1034.595562] [<ffffffff81005751>] ? print_context_stack+0x11/0xf0
[ 1034.599553] [<ffffffff8165b42f>] page_fault+0x1f/0x30
[ 1034.603473] [<ffffffff81005751>] ? print_context_stack+0x11/0xf0
[ 1034.612922] [<ffffffff81104020>] ? __add_hash_entry+0x90/0x90
[ 1034.616813] [<ffffffff8131ef40>] ? bsearch+0x60/0x90
[ 1034.620667] [<ffffffff81104020>] ? __add_hash_entry+0x90/0x90
[ 1034.624529] [<ffffffff8165e9e9>] ? add_preempt_count+0x9/0xe0
[ 1034.628378] [<ffffffff8165b466>] ? paranoid_exit+0x6/0x1b
[ 1034.637760] [<ffffffff810b0b38>] ? trace_hardirqs_off_caller+0x28/0xc0
[ 1034.647158] [<ffffffff8131ac5d>] ? trace_hardirqs_off_thunk+0x3a/0x3c
[ 1034.651037] [<ffffffff81104020>] ? __add_hash_entry+0x90/0x90
[ 1034.654882] [<ffffffff8165e9e9>] ? add_preempt_count+0x9/0xe0
[ 1034.658726] [<ffffffff8165b466>] ? paranoid_exit+0x6/0x1b
[ 1034.662576] [<ffffffff8165e9ee>] ? add_preempt_count+0xe/0xe0
[ 1034.671903] <<EOE>>
[ 1034.671903] ---[ end trace d0e6e5741aaf56ae ]---
[ 1042.542768] BUG: soft lockup - CPU#4 stuck for 22s! [bash:736]
[ 1042.550033] Modules linked in: ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables crc32c_intel ghash_clmulni_intel microcode usb_debug serio_raw pcspkr iTCO_wdt i2c_i801 iTCO_vendor_support e1000e nfsd nfs_acl auth_rpcgss lockd sunrpc i915 video i2c_algo_bit drm_kms_helper drm i2c_core [last unloaded: scsi_wait_scan]
[ 1042.562286] irq event stamp: 109562
[ 1042.569389] hardirqs last enabled at (109561): [<ffffffff8165b4f4>] paranoid_restore+0x10/0x66
[ 1042.576591] hardirqs last disabled at (109562): [<ffffffff8165a1e9>] _raw_spin_lock_irq+0x19/0x80
[ 1042.583959] softirqs last enabled at (109554): [<ffffffff81052054>] __do_softirq+0x144/0x3d0
[ 1042.591204] softirqs last disabled at (109533): [<ffffffff81663e4c>] call_softirq+0x1c/0x30
[ 1042.598508] CPU 4
[ 1042.606084] Modules linked in: ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables crc32c_intel ghash_clmulni_intel microcode usb_debug serio_raw pcspkr iTCO_wdt i2c_i801 iTCO_vendor_support e1000e nfsd nfs_acl auth_rpcgss lockd sunrpc i915 video i2c_algo_bit drm_kms_helper drm i2c_core [last unloaded: scsi_wait_scan]
[ 1042.622155]
[ 1042.629673] Pid: 736, comm: bash Tainted: G D W 3.4.0+ #30
[ 1042.637406] RIP: 0010:[<ffffffff810be800>] [<ffffffff810be800>] smp_call_function_many+0x1f0/0x260
[ 1042.645077] RSP: 0018:ffff88014251bbf8 EFLAGS: 00000202
[ 1042.652634] RAX: 0000000000000001 RBX: ffffffff8165b21d RCX: 0000000000000000
[ 1042.660277] RDX: 0000000000000004 RSI: ffffffff8118eab5 RDI: ffffffff810b6edd
[ 1042.667798] RBP: ffff88014251bc38 R08: ffff880143a1f2d8 R09: 0000000000000000
[ 1042.675538] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88014251bb68
[ 1042.683235] R13: ffff8801485d3080 R14: ffff88014251a000 R15: ffff88014251bfd8
[ 1042.690960] FS: 00007f206db43740(0000) GS:ffff880148400000(0000) knlGS:0000000000000000
[ 1042.698725] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1042.706516] CR2: 00000037682bad10 CR3: 0000000141f10000 CR4: 00000000001407e0
[ 1042.714256] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1042.722048] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 1042.729836] Process bash (pid: 736, threadinfo ffff88014251a000, task ffff880145834d40)
[ 1042.734323] Stack:
[ 1042.741936] 0000000000000000 ffffffff81029970 0000000000000296 ffffffff81029970
[ 1042.746452] 0000000000000000 0000000000000001 00000000000062f9 ffffffff816626d0
[ 1042.750989] ffff88014251bc68 ffffffff810be976 ffff88014251bc68 0000000000000001
[ 1042.755485] Call Trace:
[ 1042.759885] [<ffffffff81029970>] ? apic_send_IPI_self+0x50/0x50
[ 1042.764367] [<ffffffff81029970>] ? apic_send_IPI_self+0x50/0x50
[ 1042.768858] [<ffffffff816626d0>] ? mcount+0x10/0x10
[ 1042.773295] [<ffffffff810be976>] smp_call_function+0x46/0x80
[ 1042.777761] [<ffffffff81029970>] ? apic_send_IPI_self+0x50/0x50
[ 1042.785902] [<ffffffff810bea1c>] on_each_cpu+0x3c/0xb0
[ 1042.794051] [<ffffffff81029bde>] run_sync+0x1e/0x50
[ 1042.802138] [<ffffffff8102a021>] ftrace_replace_code+0x291/0x380
[ 1042.806621] [<ffffffff811079ca>] ftrace_modify_all_code+0x6a/0x80
[ 1042.811074] [<ffffffff8102a120>] arch_ftrace_update_code+0x10/0x20
[ 1042.815520] [<ffffffff81107a42>] ftrace_run_update_code+0x22/0xa0
[ 1042.819982] [<ffffffff81107af9>] ftrace_startup_enable+0x39/0x50
[ 1042.824413] [<ffffffff811081b6>] ftrace_startup+0x46/0x80
[ 1042.828836] [<ffffffff81108233>] register_ftrace_function+0x43/0x70
[ 1042.833253] [<ffffffff81118299>] start_irqsoff_tracer.isra.1+0x19/0x70
[ 1042.837695] [<ffffffff8111833c>] __irqsoff_tracer_init+0x4c/0x70
[ 1042.842104] [<ffffffff811183b3>] irqsoff_tracer_init+0x13/0x20
[ 1042.846508] [<ffffffff81113f46>] tracer_init+0x26/0x30
[ 1042.850913] [<ffffffff811144dd>] tracing_set_tracer+0x27d/0x320
[ 1042.855332] [<ffffffff81114645>] tracing_set_trace_write+0xc5/0x100
[ 1042.859768] [<ffffffff810b0b38>] ? trace_hardirqs_off_caller+0x28/0xc0
[ 1042.864194] [<ffffffff810860f1>] ? get_parent_ip+0x11/0x50
[ 1042.868600] [<ffffffff812ad58c>] ? security_file_permission+0x2c/0xb0
[ 1042.873036] [<ffffffff811a728f>] vfs_write+0xaf/0x190
[ 1042.877429] [<ffffffff811a75cd>] sys_write+0x4d/0x90
[ 1042.881836] [<ffffffff81662952>] system_call_fastpath+0x16/0x1b
[ 1042.886746] Code: c0 81 e8 b4 c5 59 00 0f ae f0 49 8b 7e 30 ff 15 7f df b5 00 45 84 ff 0f 84 91 fe ff ff 41 f6 46 20 01 0f 84 86 fe ff ff 0f 1f 00 <f3> 90 41 f6 46 20 01 75 f7 e9 75 fe ff ff 66 90 48 8b 55 c0 48
[ 1070.519234] BUG: soft lockup - CPU#4 stuck for 22s! [bash:736]
[ 1070.527311] Modules linked in: ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables crc32c_intel ghash_clmulni_intel microcode usb_debug serio_raw pcspkr iTCO_wdt i2c_i801 iTCO_vendor_support e1000e nfsd nfs_acl auth_rpcgss lockd sunrpc i915 video i2c_algo_bit drm_kms_helper drm i2c_core [last unloaded: scsi_wait_scan]
[ 1070.541727] irq event stamp: 109562
[ 1070.546312] hardirqs last enabled at (109561): [<ffffffff8165b4f4>] paranoid_restore+0x10/0x66
[ 1070.551010] hardirqs last disabled at (109562): [<ffffffff8165a1e9>] _raw_spin_lock_irq+0x19/0x80
[ 1070.558796] softirqs last enabled at (109554): [<ffffffff81052054>] __do_softirq+0x144/0x3d0
[ 1070.566674] softirqs last disabled at (109533): [<ffffffff81663e4c>] call_softirq+0x1c/0x30
[ 1070.574547] CPU 4
[ 1070.582620] Modules linked in: ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables crc32c_intel ghash_clmulni_intel microcode usb_debug serio_raw pcspkr iTCO_wdt i2c_i801 iTCO_vendor_support e1000e nfsd nfs_acl auth_rpcgss lockd sunrpc i915 video i2c_algo_bit drm_kms_helper drm i2c_core [last unloaded: scsi_wait_scan]
[ 1070.600333]
[ 1070.608261] Pid: 736, comm: bash Tainted: G D W 3.4.0+ #30
[ 1070.616428] RIP: 0010:[<ffffffff810be807>] [<ffffffff810be807>] smp_call_function_many+0x1f7/0x260
[ 1070.624512] RSP: 0018:ffff88014251bbf8 EFLAGS: 00000202
[ 1070.632485] RAX: 0000000000000001 RBX: ffffffff8165b21d RCX: 0000000000000000
[ 1070.640481] RDX: 0000000000000004 RSI: ffffffff8118eab5 RDI: ffffffff810b6edd
[ 1070.648436] RBP: ffff88014251bc38 R08: ffff880143a1f2d8 R09: 0000000000000000
[ 1070.656434] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88014251bb68
[ 1070.661106] R13: ffff8801485d3080 R14: ffff88014251a000 R15: ffff88014251bfd8
[ 1070.665787] FS: 00007f206db43740(0000) GS:ffff880148400000(0000) knlGS:0000000000000000
[ 1070.673817] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1070.681771] CR2: 00000037682bad10 CR3: 0000000141f10000 CR4: 00000000001407e0
[ 1070.686462] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1070.691116] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 1070.695776] Process bash (pid: 736, threadinfo ffff88014251a000, task ffff880145834d40)
[ 1070.703590] Stack:
[ 1070.711420] 0000000000000000 ffffffff81029970 0000000000000296 ffffffff81029970
[ 1070.719481] 0000000000000000 0000000000000001 00000000000062f9 ffffffff816626d0
[ 1070.727507] ffff88014251bc68 ffffffff810be976 ffff88014251bc68 0000000000000001
[ 1070.732175] Call Trace:
[ 1070.736713] [<ffffffff81029970>] ? apic_send_IPI_self+0x50/0x50
[ 1070.741355] [<ffffffff81029970>] ? apic_send_IPI_self+0x50/0x50
[ 1070.745956] [<ffffffff816626d0>] ? mcount+0x10/0x10
[ 1070.750539] [<ffffffff810be976>] smp_call_function+0x46/0x80
[ 1070.755146] [<ffffffff81029970>] ? apic_send_IPI_self+0x50/0x50
[ 1070.759755] [<ffffffff810bea1c>] on_each_cpu+0x3c/0xb0
[ 1070.768201] [<ffffffff81029bde>] run_sync+0x1e/0x50
[ 1070.776475] [<ffffffff8102a021>] ftrace_replace_code+0x291/0x380
[ 1070.781125] [<ffffffff811079ca>] ftrace_modify_all_code+0x6a/0x80
[ 1070.785743] [<ffffffff8102a120>] arch_ftrace_update_code+0x10/0x20
[ 1070.790372] [<ffffffff81107a42>] ftrace_run_update_code+0x22/0xa0
[ 1070.794988] [<ffffffff81107af9>] ftrace_startup_enable+0x39/0x50
[ 1070.799614] [<ffffffff811081b6>] ftrace_startup+0x46/0x80
[ 1070.804221] [<ffffffff81108233>] register_ftrace_function+0x43/0x70
[ 1070.808842] [<ffffffff81118299>] start_irqsoff_tracer.isra.1+0x19/0x70
[ 1070.813494] [<ffffffff8111833c>] __irqsoff_tracer_init+0x4c/0x70
[ 1070.821897] [<ffffffff811183b3>] irqsoff_tracer_init+0x13/0x20
[ 1070.830209] [<ffffffff81113f46>] tracer_init+0x26/0x30
[ 1070.838475] [<ffffffff811144dd>] tracing_set_tracer+0x27d/0x320
[ 1070.846763] [<ffffffff81114645>] tracing_set_trace_write+0xc5/0x100
[ 1070.851413] [<ffffffff810b0b38>] ? trace_hardirqs_off_caller+0x28/0xc0
[ 1070.856060] [<ffffffff810860f1>] ? get_parent_ip+0x11/0x50
[ 1070.860663] [<ffffffff812ad58c>] ? security_file_permission+0x2c/0xb0
[ 1070.865317] [<ffffffff811a728f>] vfs_write+0xaf/0x190
[ 1070.869913] [<ffffffff811a75cd>] sys_write+0x4d/0x90
[ 1070.874531] [<ffffffff81662952>] system_call_fastpath+0x16/0x1b
[ 1070.883313] Code: 0f ae f0 49 8b 7e 30 ff 15 7f df b5 00 45 84 ff 0f 84 91 fe ff ff 41 f6 46 20 01 0f 84 86 fe ff ff 0f 1f 00 f3 90 41 f6 46 20 01 <75> f7 e9 75 fe ff ff 66 90 48 8b 55 c0 48 8b 75 c8 41 0f b6 cf
[ 1098.495701] BUG: soft lockup - CPU#4 stuck for 23s! [bash:736]
[ 1098.503796] Modules linked in: ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables crc32c_intel ghash_clmulni_intel microcode usb_debug serio_raw pcspkr iTCO_wdt i2c_i801 iTCO_vendor_support e1000e nfsd nfs_acl auth_rpcgss lockd sunrpc i915 video i2c_algo_bit drm_kms_helper drm i2c_core [last unloaded: scsi_wait_scan]
[ 1098.521248] irq event stamp: 109562
[ 1098.529054] hardirqs last enabled at (109561): [<ffffffff8165b4f4>] paranoid_restore+0x10/0x66
[ 1098.533770] hardirqs last disabled at (109562): [<ffffffff8165a1e9>] _raw_spin_lock_irq+0x19/0x80
[ 1098.538489] softirqs last enabled at (109554): [<ffffffff81052054>] __do_softirq+0x144/0x3d0
[ 1098.543228] softirqs last disabled at (109533): [<ffffffff81663e4c>] call_softirq+0x1c/0x30
[ 1098.551115] CPU 4
[ 1098.559187] Modules linked in: ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables crc32c_intel ghash_clmulni_intel microcode usb_debug serio_raw pcspkr iTCO_wdt i2c_i801 iTCO_vendor_support e1000e nfsd nfs_acl auth_rpcgss lockd sunrpc i915 video i2c_algo_bit drm_kms_helper drm i2c_core [last unloaded: scsi_wait_scan]
[ 1098.576879]
[ 1098.584800] Pid: 736, comm: bash Tainted: G D W 3.4.0+ #30
[ 1098.589602] RIP: 0010:[<ffffffff810be807>] [<ffffffff810be807>] smp_call_function_many+0x1f7/0x260
[ 1098.594390] RSP: 0018:ffff88014251bbf8 EFLAGS: 00000202
[ 1098.602434] RAX: 0000000000000001 RBX: ffffffff8165b21d RCX: 0000000000000000
[ 1098.610433] RDX: 0000000000000004 RSI: ffffffff8118eab5 RDI: ffffffff810b6edd
[ 1098.618362] RBP: ffff88014251bc38 R08: ffff880143a1f2d8 R09: 0000000000000000
[ 1098.626485] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88014251bb68
[ 1098.631200] R13: ffff8801485d3080 R14: ffff88014251a000 R15: ffff88014251bfd8
[ 1098.635898] FS: 00007f206db43740(0000) GS:ffff880148400000(0000) knlGS:0000000000000000
[ 1098.640604] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1098.645262] CR2: 00000037682bad10 CR3: 0000000141f10000 CR4: 00000000001407e0
[ 1098.649957] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1098.657983] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 1098.662678] Process bash (pid: 736, threadinfo ffff88014251a000, task ffff880145834d40)
[ 1098.667361] Stack:
[ 1098.671941] 0000000000000000 ffffffff81029970 0000000000000296 ffffffff81029970
[ 1098.680070] 0000000000000000 0000000000000001 00000000000062f9 ffffffff816626d0
[ 1098.688135] ffff88014251bc68 ffffffff810be976 ffff88014251bc68 0000000000000001
[ 1098.696133] Call Trace:
[ 1098.704135] [<ffffffff81029970>] ? apic_send_IPI_self+0x50/0x50
[ 1098.708787] [<ffffffff81029970>] ? apic_send_IPI_self+0x50/0x50
[ 1098.713402] [<ffffffff816626d0>] ? mcount+0x10/0x10
[ 1098.717993] [<ffffffff810be976>] smp_call_function+0x46/0x80
[ 1098.726269] [<ffffffff81029970>] ? apic_send_IPI_self+0x50/0x50
[ 1098.730928] [<ffffffff810bea1c>] on_each_cpu+0x3c/0xb0
[ 1098.735545] [<ffffffff81029bde>] run_sync+0x1e/0x50
[ 1098.743887] [<ffffffff8102a021>] ftrace_replace_code+0x291/0x380
[ 1098.752191] [<ffffffff811079ca>] ftrace_modify_all_code+0x6a/0x80
[ 1098.756840] [<ffffffff8102a120>] arch_ftrace_update_code+0x10/0x20
[ 1098.761471] [<ffffffff81107a42>] ftrace_run_update_code+0x22/0xa0
[ 1098.769736] [<ffffffff81107af9>] ftrace_startup_enable+0x39/0x50
[ 1098.778035] [<ffffffff811081b6>] ftrace_startup+0x46/0x80
[ 1098.786299] [<ffffffff81108233>] register_ftrace_function+0x43/0x70
[ 1098.794641] [<ffffffff81118299>] start_irqsoff_tracer.isra.1+0x19/0x70
[ 1098.799297] [<ffffffff8111833c>] __irqsoff_tracer_init+0x4c/0x70
[ 1098.803952] [<ffffffff811183b3>] irqsoff_tracer_init+0x13/0x20
[ 1098.808601] [<ffffffff81113f46>] tracer_init+0x26/0x30
[ 1098.816936] [<ffffffff811144dd>] tracing_set_tracer+0x27d/0x320
[ 1098.825254] [<ffffffff81114645>] tracing_set_trace_write+0xc5/0x100
[ 1098.833579] [<ffffffff810b0b38>] ? trace_hardirqs_off_caller+0x28/0xc0
[ 1098.841906] [<ffffffff810860f1>] ? get_parent_ip+0x11/0x50
[ 1098.846546] [<ffffffff812ad58c>] ? security_file_permission+0x2c/0xb0
[ 1098.851204] [<ffffffff811a728f>] vfs_write+0xaf/0x190
[ 1098.855838] [<ffffffff811a75cd>] sys_write+0x4d/0x90
[ 1098.864166] [<ffffffff81662952>] system_call_fastpath+0x16/0x1b
[ 1098.872969] Code: 0f ae f0 49 8b 7e 30 ff 15 7f df b5 00 45 84 ff 0f 84 91 fe ff ff 41 f6 46 20 01 0f 84 86 fe ff ff 0f 1f 00 f3 90 41 f6 46 20 01 <75> f7 e9 75 fe ff ff 66 90 48 8b 55 c0 48 8b 75 c8 41 0f b6 cf
[ 1126.472169] BUG: soft lockup - CPU#4 stuck for 23s! [bash:736]
[ 1126.480251] Modules linked in: ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables crc32c_intel ghash_clmulni_intel microcode usb_debug serio_raw pcspkr iTCO_wdt i2c_i801 iTCO_vendor_support e1000e nfsd nfs_acl auth_rpcgss lockd sunrpc i915 video i2c_algo_bit drm_kms_helper drm i2c_core [last unloaded: scsi_wait_scan]
[ 1126.494669] irq event stamp: 109562
[ 1126.502447] hardirqs last enabled at (109561): [<ffffffff8165b4f4>] paranoid_restore+0x10/0x66
[ 1126.507139] hardirqs last disabled at (109562): [<ffffffff8165a1e9>] _raw_spin_lock_irq+0x19/0x80
[ 1126.511860] softirqs last enabled at (109554): [<ffffffff81052054>] __do_softirq+0x144/0x3d0
[ 1126.519665] softirqs last disabled at (109533): [<ffffffff81663e4c>] call_softirq+0x1c/0x30
[ 1126.527532] CPU 4
[ 1126.535574] Modules linked in: ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables crc32c_intel ghash_clmulni_intel microcode usb_debug serio_raw pcspkr iTCO_wdt i2c_i801 iTCO_vendor_support e1000e nfsd nfs_acl auth_rpcgss lockd sunrpc i915 video i2c_algo_bit drm_kms_helper drm i2c_core [last unloaded: scsi_wait_scan]
[ 1126.553312]
[ 1126.561265] Pid: 736, comm: bash Tainted: G D W 3.4.0+ #30
[ 1126.566064] RIP: 0010:[<ffffffff810be800>] [<ffffffff810be800>] smp_call_function_many+0x1f0/0x260
[ 1126.570845] RSP: 0018:ffff88014251bbf8 EFLAGS: 00000202
[ 1126.575491] RAX: 0000000000000001 RBX: ffffffff8165b21d RCX: 0000000000000000
[ 1126.580161] RDX: 0000000000000004 RSI: ffffffff8118eab5 RDI: ffffffff810b6edd
[ 1126.584818] RBP: ffff88014251bc38 R08: ffff880143a1f2d8 R09: 0000000000000000
[ 1126.592642] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88014251bb68
[ 1126.600621] R13: ffff8801485d3080 R14: ffff88014251a000 R15: ffff88014251bfd8
[ 1126.608614] FS: 00007f206db43740(0000) GS:ffff880148400000(0000) knlGS:0000000000000000
[ 1126.616664] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1126.621333] CR2: 00000037682bad10 CR3: 0000000141f10000 CR4: 00000000001407e0
[ 1126.626014] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1126.630706] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 1126.635392] Process bash (pid: 736, threadinfo ffff88014251a000, task ffff880145834d40)
[ 1126.640072] Stack:
[ 1126.644634] 0000000000000000 ffffffff81029970 0000000000000296 ffffffff81029970
[ 1126.652702] 0000000000000000 0000000000000001 00000000000062f9 ffffffff816626d0
[ 1126.657407] ffff88014251bc68 ffffffff810be976 ffff88014251bc68 0000000000000001
[ 1126.662081] Call Trace:
[ 1126.666629] [<ffffffff81029970>] ? apic_send_IPI_self+0x50/0x50
[ 1126.674930] [<ffffffff81029970>] ? apic_send_IPI_self+0x50/0x50
[ 1126.679558] [<ffffffff816626d0>] ? mcount+0x10/0x10
[ 1126.684141] [<ffffffff810be976>] smp_call_function+0x46/0x80
[ 1126.688747] [<ffffffff81029970>] ? apic_send_IPI_self+0x50/0x50
[ 1126.693382] [<ffffffff810bea1c>] on_each_cpu+0x3c/0xb0
[ 1126.697991] [<ffffffff81029bde>] run_sync+0x1e/0x50
[ 1126.702594] [<ffffffff8102a021>] ftrace_replace_code+0x291/0x380
[ 1126.707242] [<ffffffff811079ca>] ftrace_modify_all_code+0x6a/0x80
[ 1126.711867] [<ffffffff8102a120>] arch_ftrace_update_code+0x10/0x20
[ 1126.720179] [<ffffffff81107a42>] ftrace_run_update_code+0x22/0xa0
[ 1126.724823] [<ffffffff81107af9>] ftrace_startup_enable+0x39/0x50
[ 1126.729459] [<ffffffff811081b6>] ftrace_startup+0x46/0x80
[ 1126.734078] [<ffffffff81108233>] register_ftrace_function+0x43/0x70
[ 1126.742457] [<ffffffff81118299>] start_irqsoff_tracer.isra.1+0x19/0x70
[ 1126.747139] [<ffffffff8111833c>] __irqsoff_tracer_init+0x4c/0x70
[ 1126.751772] [<ffffffff811183b3>] irqsoff_tracer_init+0x13/0x20
[ 1126.756408] [<ffffffff81113f46>] tracer_init+0x26/0x30
[ 1126.764618] [<ffffffff811144dd>] tracing_set_tracer+0x27d/0x320
[ 1126.772879] [<ffffffff81114645>] tracing_set_trace_write+0xc5/0x100
[ 1126.781233] [<ffffffff810b0b38>] ? trace_hardirqs_off_caller+0x28/0xc0
[ 1126.789573] [<ffffffff810860f1>] ? get_parent_ip+0x11/0x50
[ 1126.797825] [<ffffffff812ad58c>] ? security_file_permission+0x2c/0xb0
[ 1126.806145] [<ffffffff811a728f>] vfs_write+0xaf/0x190
[ 1126.810757] [<ffffffff811a75cd>] sys_write+0x4d/0x90
[ 1126.815386] [<ffffffff81662952>] system_call_fastpath+0x16/0x1b
[ 1126.820508] Code: c0 81 e8 b4 c5 59 00 0f ae f0 49 8b 7e 30 ff 15 7f df b5 00 45 84 ff 0f 84 91 fe ff ff 41 f6 46 20 01 0f 84 86 fe ff ff 0f 1f 00 <f3> 90 41 f6 46 20 01 75 f7 e9 75 fe ff ff 66 90 48 8b 55 c0 48
and then a bunch more CPU stuck for the other cpus..
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