00 00000000 00000000 00000000 [95018.914076] INFO: rcu_sched self-detected stall on CPU { 2} (t=474078 jiffies) [95018.914083] sending NMI to all CPUs: [95018.914087] NMI backtrace for cpu 2 [95018.914089] CPU 2 [95018.914090] Modules linked in: ext4 jbd2 option usb_wwan qmi_wwan usbnet usbserial cdc_wdm usb_storage ppp_async ppp_generic slhc iwlwifi [last unloaded: usb_storage] [95018.914106] [95018.914109] Pid: 19832, comm: jbd2/sdd1-8 Not tainted 3.4.0-rc7-default #5 Dell Inc. Vostro 3550/ [95018.914114] RIP: 0010:[] [] find_next_bit+0x39/0x9c [95018.914123] RSP: 0018:ffff88041fb03d68 EFLAGS: 00000046 [95018.914125] RAX: 0000000000000000 RBX: ffff88041fb0cf40 RCX: 0000000000000001 [95018.914128] RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000004 [95018.914130] RBP: ffff88041fb03d68 R08: 0000000000000000 R09: ffff88041fb0cf40 [95018.914133] R10: ffff88049fb03d07 R11: 0000000000000000 R12: 0000000000000001 [95018.914136] R13: 000000000000000f R14: 000000000000cf50 R15: 000000000000cf48 [95018.914139] FS: 0000000000000000(0000) GS:ffff88041fb00000(0000) knlGS:0000000000000000 [95018.914142] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [95018.914144] CR2: 0000000002c80000 CR3: 000000000191f000 CR4: 00000000000407e0 [95018.914147] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [95018.914150] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [95018.914153] Process jbd2/sdd1-8 (pid: 19832, threadinfo ffff880102622000, task ffff8803bbc72c90) [95018.914155] Stack: [95018.914157] ffff88041fb03dc8 ffffffff81047c05 0000000000000002 0000000200080000 [95018.914162] ffff88041fa0cf48 0000000000000096 ffff88041fb03da8 0000000000002710 [95018.914167] ffffffff81938600 ffffffff81938600 0000000000000001 7fffffffffffffff [95018.914171] Call Trace: [95018.914173] [95018.914180] [] __x2apic_send_IPI_mask+0xf1/0x113 [95018.914184] [] x2apic_send_IPI_all+0x17/0x19 [95018.914188] [] arch_trigger_all_cpu_backtrace+0x4e/0x71 [95018.914195] [] __rcu_pending+0xab/0x39c [95018.914199] [] rcu_pending+0x27/0x59 [95018.914203] [] rcu_check_callbacks+0x44/0x52 [95018.914209] [] update_process_times+0x3c/0x73 [95018.914214] [] tick_sched_timer+0x72/0x91 [95018.914220] [] __run_hrtimer.clone.24+0x71/0xe7 [95018.914223] [] hrtimer_interrupt+0xcb/0x18e [95018.914228] [] smp_apic_timer_interrupt+0x72/0x85 [95018.914234] [] apic_timer_interrupt+0x67/0x70 [95018.914236] [95018.914241] [] ? generic_segment_checks+0x77/0x77 [95018.914246] [] ? find_get_pages_tag+0x71/0x12a [95018.914251] [] pagevec_lookup_tag+0x20/0x29 [95018.914255] [] write_cache_pages+0x13a/0x377 [95018.914258] [] ? set_page_dirty+0x5b/0x5b [95018.914264] [] ? ttwu_do_activate.clone.50+0x57/0x5c [95018.914268] [] generic_writepages+0x40/0x57 [95018.914276] [] jbd2_journal_commit_transaction+0x372/0x1145 [jbd2] [95018.914281] [] ? _raw_spin_lock_irqsave+0xd/0x27 [95018.914285] [] ? lock_timer_base.clone.21+0x26/0x4b [95018.914290] [] ? try_to_del_timer_sync+0x7f/0x8a [95018.914296] [] kjournald2+0xc9/0x219 [jbd2] [95018.914301] [] ? wake_up_bit+0x25/0x25 [95018.914306] [] ? freezing+0x17/0x17 [jbd2] [95018.914310] [] kthread+0x84/0x8c [95018.914315] [] kernel_thread_helper+0x4/0x10 [95018.914319] [] ? kthread_freezable_should_stop+0x41/0x41 [95018.914323] [] ? gs_change+0xb/0xb [95018.914325] Code: 00 00 48 89 d1 49 89 d0 48 c1 e9 06 49 83 e0 c0 4c 8d 0c cf 48 89 f7 4c 29 c7 83 e2 3f 74 39 48 83 c8 ff 88 d1 48 d3 e0 49 23 01 <48> 83 ff 3f 76 3b 48 85 c0 75 4f 49 83 c1 08 48 83 ef 40 49 83 [95018.914365] Call Trace: [95018.914367] [] __x2apic_send_IPI_mask+0xf1/0x113 [95018.914374] [] x2apic_send_IPI_all+0x17/0x19 [95018.914378] [] arch_trigger_all_cpu_backtrace+0x4e/0x71 [95018.914382] [] __rcu_pending+0xab/0x39c [95018.914387] [] rcu_pending+0x27/0x59 [95018.914391] [] rcu_check_callbacks+0x44/0x52 [95018.914395] [] update_process_times+0x3c/0x73 [95018.914399] [] tick_sched_timer+0x72/0x91 [95018.914403] [] __run_hrtimer.clone.24+0x71/0xe7 [95018.914407] [] hrtimer_interrupt+0xcb/0x18e [95018.914411] [] smp_apic_timer_interrupt+0x72/0x85 [95018.914416] [] apic_timer_interrupt+0x67/0x70 [95018.914418] [] ? generic_segment_checks+0x77/0x77 [95018.914425] [] ? find_get_pages_tag+0x71/0x12a [95018.914429] [] pagevec_lookup_tag+0x20/0x29 [95018.914432] [] write_cache_pages+0x13a/0x377 [95018.914436] [] ? set_page_dirty+0x5b/0x5b [95018.914440] [] ? ttwu_do_activate.clone.50+0x57/0x5c [95018.914445] [] generic_writepages+0x40/0x57 [95018.914451] [] jbd2_journal_commit_transaction+0x372/0x1145 [jbd2] [95018.914456] [] ? _raw_spin_lock_irqsave+0xd/0x27 [95018.914460] [] ? lock_timer_base.clone.21+0x26/0x4b [95018.914464] [] ? try_to_del_timer_sync+0x7f/0x8a [95018.914470] [] kjournald2+0xc9/0x219 [jbd2] [95018.914474] [] ? wake_up_bit+0x25/0x25 [95018.914480] [] ? freezing+0x17/0x17 [jbd2] [95018.914483] [] kthread+0x84/0x8c [95018.914487] [] kernel_thread_helper+0x4/0x10 [95018.914492] [] ? kthread_freezable_should_stop+0x41/0x41 [95018.914496] [] ? gs_change+0xb/0xb [95018.914498] NMI backtrace for cpu 0 [95018.914500] CPU 0 [95018.914502] Modules linked in: ext4 jbd2 option usb_wwan qmi_wwan usbnet usbserial cdc_wdm usb_storage ppp_async ppp_generic slhc iwlwifi [last unloaded: usb_storage] [95018.914514] [95018.914517] Pid: 0, comm: swapper/0 Not tainted 3.4.0-rc7-default #5 Dell Inc. Vostro 3550/ [95018.914521] RIP: 0010:[] [] check_preempt_curr+0x17/0x73 [95018.914527] RSP: 0018:ffff88041fa03de8 EFLAGS: 00000096 [95018.914530] RAX: ffffffff816116b0 RBX: ffff88041fa10f40 RCX: ffffffff81611840 [95018.914533] RDX: 0000000000000000 RSI: ffff88040f0f2c50 RDI: ffff88041fa10f40 [95018.914536] RBP: ffff88041fa03df8 R08: 0000000000000000 R09: ffffffff819180b8 [95018.914538] R10: 0000000000000000 R11: 0000000000000086 R12: ffff88040f0f2c50 [95018.914541] R13: 0000000000000000 R14: 0000000000000096 R15: ffff88041fa10f40 [95018.914544] FS: 0000000000000000(0000) GS:ffff88041fa00000(0000) knlGS:0000000000000000 [95018.914547] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [95018.914550] CR2: 00007f0497045000 CR3: 000000000191f000 CR4: 00000000000407f0 [95018.914553] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [95018.914555] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [95018.914559] Process swapper/0 (pid: 0, threadinfo ffffffff81914000, task ffffffff81927020) [95018.914561] Stack: [95018.914562] 0000000000000000 ffff88041fa10f40 ffff88041fa03e18 ffffffff810980eb [95018.914567] ffff88040f0f2c50 ffff88041fa10f40 ffff88041fa03e38 ffffffff8109821a [95018.914572] ffff88040f0f2c50 ffff88040f0f310e ffff88041fa03e98 ffffffff8109a0e4 [95018.914576] Call Trace: [95018.914578] [95018.914582] [] ttwu_do_wakeup+0x12/0x86 [95018.914586] [] ttwu_do_activate.clone.50+0x57/0x5c [95018.914590] [] try_to_wake_up+0x185/0x1ae [95018.914595] [] ? hrtimer_get_next_event+0x87/0x9f [95018.914599] [] ? rcu_implicit_dynticks_qs+0x1a/0x7b [95018.914603] [] wake_up_process+0x10/0x12 [95018.914607] [] wakeup_softirqd+0x1f/0x21 [95018.914611] [] raise_softirq_irqoff+0x33/0x35 [95018.914614] [] raise_softirq+0x1c/0x25 [95018.914619] [] invoke_rcu_core+0xe/0x10 [95018.914623] [] rcu_idle_enter_common.clone.36+0x267/0x2a7 [95018.914628] [] rcu_irq_exit+0x5c/0x64 [95018.914631] [] irq_exit+0x98/0x9a [95018.914635] [] scheduler_ipi+0x6b/0x6d [95018.914639] [] smp_reschedule_interrupt+0x16/0x18 [95018.914643] [] reschedule_interrupt+0x67/0x70 [95018.914645] [95018.914651] [] ? intel_idle+0xdc/0x102 [95018.914655] [] ? intel_idle+0xbb/0x102 [95018.914660] [] cpuidle_enter+0x12/0x14 [95018.914664] [] cpuidle_idle_call+0x7b/0xc4 [95018.914669] [] cpu_idle+0x56/0x7f [95018.914674] [] rest_init+0x6d/0x6f [95018.914679] [] start_kernel+0x33c/0x349 [95018.914682] [] ? repair_env_string+0x56/0x56 [95018.914687] [] x86_64_start_reservations+0xb6/0xbb [95018.914690] [] x86_64_start_kernel+0xf2/0xf9 [95018.914692] Code: b5 ff ff ff 85 c0 74 07 89 df e8 3f e3 ff ff 41 58 5b c9 c3 55 48 c7 c1 40 18 61 81 48 89 e5 53 48 89 fb 48 83 ec 08 48 8b 46 40 <48> 8b bf f8 07 00 00 4c 8b 47 40 4c 39 c0 75 08 48 89 df ff 50 [95018.914730] Call Trace: [95018.914732] [] ttwu_do_wakeup+0x12/0x86 [95018.914739] [] ttwu_do_activate.clone.50+0x57/0x5c [95018.914743] [] try_to_wake_up+0x185/0x1ae [95018.914748] [] ? hrtimer_get_next_event+0x87/0x9f [95018.914752] [] ? rcu_implicit_dynticks_qs+0x1a/0x7b [95018.914756] [] wake_up_process+0x10/0x12 [95018.914759] [] wakeup_softirqd+0x1f/0x21 [95018.914763] [] raise_softirq_irqoff+0x33/0x35 [95018.914766] [] raise_softirq+0x1c/0x25 [95018.914770] [] invoke_rcu_core+0xe/0x10 [95018.914775] [] rcu_idle_enter_common.clone.36+0x267/0x2a7 [95018.914779] [] rcu_irq_exit+0x5c/0x64 [95018.914783] [] irq_exit+0x98/0x9a [95018.914786] [] scheduler_ipi+0x6b/0x6d [95018.914790] [] smp_reschedule_interrupt+0x16/0x18 [95018.914794] [] reschedule_interrupt+0x67/0x70 [95018.914796] [] ? intel_idle+0xdc/0x102 [95018.914804] [] ? intel_idle+0xbb/0x102 [95018.914807] [] cpuidle_enter+0x12/0x14 [95018.914811] [] cpuidle_idle_call+0x7b/0xc4 [95018.914815] [] cpu_idle+0x56/0x7f [95018.914818] [] rest_init+0x6d/0x6f [95018.914822] [] start_kernel+0x33c/0x349 [95018.914825] [] ? repair_env_string+0x56/0x56 [95018.914829] [] x86_64_start_reservations+0xb6/0xbb [95018.914833] [] x86_64_start_kernel+0xf2/0xf9 [95018.914836] NMI backtrace for cpu 3 [95018.914839] CPU 3 [95018.914841] Modules linked in: ext4 jbd2 option usb_wwan qmi_wwan usbnet usbserial cdc_wdm usb_storage ppp_async ppp_generic slhc iwlwifi [last unloaded: usb_storage] [95018.914855] [95018.914857] Pid: 19837, comm: flush-8:48 Not tainted 3.4.0-rc7-default #5 Dell Inc. Vostro 3550/ [95018.914862] RIP: 0010:[] [] find_get_pages_tag+0x50/0x12a [95018.914869] RSP: 0018:ffff8803b9f63960 EFLAGS: 00000246 [95018.914872] RAX: 0000000000000000 RBX: ffff8803b9f63ab8 RCX: ffffea0008540258 [95018.914875] RDX: ffff8801f0d018b8 RSI: 0000000000000003 RDI: ffffea0008540258 [95018.914878] RBP: ffff8803b9f639d0 R08: 000000000003c200 R09: 8140000000000000 [95018.914880] R10: ffff8803b9f639f0 R11: 0000000000000000 R12: 000000000000000e [95018.914883] R13: 0000000000000004 R14: ffff8803b9f63a40 R15: ffff8803b9f63980 [95018.914886] FS: 0000000000000000(0000) GS:ffff88041fb80000(0000) knlGS:0000000000000000 [95018.914889] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [95018.914892] CR2: 00000000028eb000 CR3: 000000000191f000 CR4: 00000000000407e0 [95018.914895] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [95018.914897] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [95018.914901] Process flush-8:48 (pid: 19837, threadinfo ffff8803b9f62000, task ffff8803ba6d26d0) [95018.914903] Stack: [95018.914904] ffffea0008540258 ffff8801f0d018b8 ffff8802e7665e70 0000010073b78b60 [95018.914910] 000000000003c1f8 000000000003c200 00000000000000ff ffff8803b9f63a30 [95018.914914] 0000000000000000 ffff8803b9f63a30 000000000003c1f4 ffff8803b9f63a30 [95018.914919] Call Trace: [95018.914924] [] pagevec_lookup_tag+0x20/0x29 [95018.914934] [] ext4_num_dirty_pages.clone.49+0x71/0x1bd [ext4] [95018.914944] [] ext4_da_writepages+0x153/0x3de [ext4] [95018.914950] [] ? queue_unplugged.clone.37+0x32/0x40 [95018.914955] [] ? blk_finish_plug+0x13/0x34 [95018.914959] [] do_writepages+0x1c/0x25 [95018.914964] [] writeback_single_inode+0xcf/0x232 [95018.914968] [] writeback_sb_inodes+0x169/0x207 [95018.914972] [] __writeback_inodes_wb+0x73/0xb4 [95018.914976] [] wb_writeback+0x102/0x188 [95018.914980] [] ? global_dirtyable_memory+0x18/0x28 [95018.914984] [] wb_do_writeback+0x152/0x16d [95018.914988] [] bdi_writeback_thread+0x88/0x150 [95018.914992] [] ? wb_do_writeback+0x16d/0x16d [95018.914996] [] ? wb_do_writeback+0x16d/0x16d [95018.915000] [] kthread+0x84/0x8c [95018.915005] [] kernel_thread_helper+0x4/0x10 [95018.915009] [] ? kthread_freezable_should_stop+0x41/0x41 [95018.915014] [] ? gs_change+0xb/0xb [95018.915015] Code: 48 83 c7 08 45 31 ed 89 55 ac 4c 8d 7d b0 48 89 7d a0 48 8b 03 48 c7 45 b0 00 00 00 00 48 89 45 b8 31 d2 e9 89 00 00 00 48 8b 0a <48> 85 c9 74 4a f6 c1 03 74 07 80 e1 01 75 d8 0f 0b 48 89 cf 48 [95018.915055] Call Trace: [95018.915059] [] pagevec_lookup_tag+0x20/0x29 [95018.915067] [] ext4_num_dirty_pages.clone.49+0x71/0x1bd [ext4] [95018.915076] [] ext4_da_writepages+0x153/0x3de [ext4] [95018.915080] [] ? queue_unplugged.clone.37+0x32/0x40 [95018.915085] [] ? blk_finish_plug+0x13/0x34 [95018.915089] [] do_writepages+0x1c/0x25 [95018.915093] [] writeback_single_inode+0xcf/0x232 [95018.915097] [] writeback_sb_inodes+0x169/0x207 [95018.915101] [] __writeback_inodes_wb+0x73/0xb4 [95018.915105] [] wb_writeback+0x102/0x188 [95018.915108] [] ? global_dirtyable_memory+0x18/0x28 [95018.915112] [] wb_do_writeback+0x152/0x16d [95018.915117] [] bdi_writeback_thread+0x88/0x150 [95018.915120] [] ? wb_do_writeback+0x16d/0x16d [95018.915124] [] ? wb_do_writeback+0x16d/0x16d [95018.915128] [] kthread+0x84/0x8c [95018.915132] [] kernel_thread_helper+0x4/0x10 [95018.915136] [] ? kthread_freezable_should_stop+0x41/0x41 [95018.915140] [] ? gs_change+0xb/0xb [95018.915143] NMI backtrace for cpu 1 [95018.915146] CPU 1 [95018.915147] Modules linked in: ext4 jbd2 option usb_wwan qmi_wwan usbnet usbserial cdc_wdm usb_storage ppp_async ppp_generic slhc iwlwifi [last unloaded: usb_storage] [95018.915161] [95018.915164] Pid: 0, comm: swapper/1 Not tainted 3.4.0-rc7-default #5 Dell Inc. Vostro 3550/ [95018.915169] RIP: 0010:[] [] intel_idle+0xab/0x102 [95018.915175] RSP: 0018:ffff88040f37de68 EFLAGS: 00000046 [95018.915178] RAX: 0000000000000030 RBX: 0000000000000010 RCX: 0000000000000001 [95018.915181] RDX: 0000000000000000 RSI: 0000000225c17d03 RDI: ffffffff8192ad40 [95018.915184] RBP: ffff88040f37dec8 R08: 000000000000006d R09: ffff88041fa8dba0 [95018.915187] R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000004 [95018.915190] R13: ffff88041fa95970 R14: 0000000000000030 R15: 128f4acecb3cde15 [95018.915193] FS: 0000000000000000(0000) GS:ffff88041fa80000(0000) knlGS:0000000000000000 [95018.915197] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [95018.915200] CR2: 00007f0497045000 CR3: 000000000191f000 CR4: 00000000000407e0 [95018.915203] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [95018.915206] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [95018.915209] Process swapper/1 (pid: 0, threadinfo ffff88040f37c000, task ffff88040f3772d0) [95018.915212] Stack: [95018.915213] 0000000000000000 000000000d7817e8 ffff88040f37ded8 ffffffff8144de9e [95018.915218] 0000000000000000 000000010d7817e8 0000000000000000 ffff88041fa95970 [95018.915223] ffffffff8194b4f0 0000000000000004 0000000000000000 0000000000000000 [95018.915228] Call Trace: [95018.915233] [] ? menu_select+0x1a7/0x2f4 [95018.915237] [] cpuidle_enter+0x12/0x14 [95018.915241] [] cpuidle_idle_call+0x7b/0xc4 [95018.915246] [] cpu_idle+0x56/0x7f [95018.915251] [] start_secondary+0x18f/0x193 [95018.915254] Code: 04 25 88 b9 00 00 31 d2 48 2d c8 1f 00 00 48 89 d1 0f 01 c8 0f ae f0 e8 47 ff ff ff 85 c0 75 0b b9 01 00 00 00 4c 89 f0 0f 01 c9 2c 83 e3 ff 4c 29 f8 48 89 c7 e8 27 ef e0 ff 4c 69 f0 40 42 [95018.915297] Call Trace: [95018.915301] [] ? menu_select+0x1a7/0x2f4 [95018.915305] [] cpuidle_enter+0x12/0x14 [95018.915309] [] cpuidle_idle_call+0x7b/0xc4 [95018.915313] [] cpu_idle+0x56/0x7f [95018.915317] [] start_secondary+0x18f/0x193 [95198.674404] INFO: rcu_sched self-detected stall on CPU { 2} (t=492081 jiffies) [95198.674411] sending NMI to all CPUs: [95198.674415] NMI backtrace for cpu 2 [95198.674417] CPU 2 [95198.674418] Modules linked in: ext4 jbd2 option usb_wwan qmi_wwan usbnet usbserial cdc_wdm usb_storage ppp_async ppp_generic slhc iwlwifi [last unloaded: usb_storage] [95198.674435] [95198.674438] Pid: 19832, comm: jbd2/sdd1-8 Not tainted 3.4.0-rc7-default #5 Dell Inc. Vostro 3550/ [95198.674443] RIP: 0010:[] [] find_next_bit+0x8d/0x9c [95198.674452] RSP: 0018:ffff88041fb03d68 EFLAGS: 00000046 [95198.674454] RAX: 0000000000000000 RBX: ffff88041fb0cf40 RCX: 000000000000003c [95198.674457] RDX: 000000000000000f RSI: 0000000000000004 RDI: 0000000000000004 [95198.674460] RBP: ffff88041fb03d68 R08: 0000000000000000 R09: ffff88041fb0cf40 [95198.674462] R10: ffff88049fb03d07 R11: 0000000000000000 R12: 0000000000000001 [95198.674465] R13: 000000000000000f R14: 000000000000cf50 R15: 000000000000cf48 [95198.674468] FS: 0000000000000000(0000) GS:ffff88041fb00000(0000) knlGS:0000000000000000 [95198.674471] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [95198.674474] CR2: 0000000002c80000 CR3: 000000000191f000 CR4: 00000000000407e0 [95198.674476] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [95198.674479] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [95198.674483] Process jbd2/sdd1-8 (pid: 19832, threadinfo ffff880102622000, task ffff8803bbc72c90) [95198.674485] Stack: [95198.674487] ffff88041fb03dc8 ffffffff81047c05 0000000000000002 0000000200080000 [95198.674492] ffff88041fa0cf48 0000000000000096 ffff88041fb03da8 0000000000002710 [95198.674496] ffffffff81938600 ffffffff81938600 0000000000000001 7fffffffffffffff [95198.674501] Call Trace: [95198.674503] [95198.674509] [] __x2apic_send_IPI_mask+0xf1/0x113 [95198.674514] [] x2apic_send_IPI_all+0x17/0x19 [95198.674518] [] arch_trigger_all_cpu_backtrace+0x4e/0x71 [95198.674525] [] __rcu_pending+0xab/0x39c [95198.674529] [] rcu_pending+0x27/0x59 [95198.674534] [] rcu_check_callbacks+0x44/0x52 [95198.674539] [] update_process_times+0x3c/0x73 [95198.674544] [] tick_sched_timer+0x72/0x91 [95198.674550] [] __run_hrtimer.clone.24+0x71/0xe7 [95198.674553] [] hrtimer_interrupt+0xcb/0x18e [95198.674558] [] smp_apic_timer_interrupt+0x72/0x85 [95198.674564] [] apic_timer_interrupt+0x67/0x70 [95198.674566] [95198.674571] [] ? find_get_pages_tag+0x50/0x12a [95198.674577] [] pagevec_lookup_tag+0x20/0x29 [95198.674581] [] write_cache_pages+0x13a/0x377 [95198.674584] [] ? set_page_dirty+0x5b/0x5b [95198.674590] [] ? ttwu_do_activate.clone.50+0x57/0x5c [95198.674594] [] generic_writepages+0x40/0x57 [95198.674602] [] jbd2_journal_commit_transaction+0x372/0x1145 [jbd2] [95198.674607] [] ? _raw_spin_lock_irqsave+0xd/0x27 [95198.674612] [] ? lock_timer_base.clone.21+0x26/0x4b [95198.674616] [] ? try_to_del_timer_sync+0x7f/0x8a [95198.674623] [] kjournald2+0xc9/0x219 [jbd2] [95198.674627] [] ? wake_up_bit+0x25/0x25 [95198.674633] [] ? freezing+0x17/0x17 [jbd2] [95198.674637] [] kthread+0x84/0x8c [95198.674641] [] kernel_thread_helper+0x4/0x10 [95198.674646] [] ? kthread_freezable_should_stop+0x41/0x41 [95198.674650] [] ? gs_change+0xb/0xb [95198.674652] Code: 48 83 ef 40 48 f7 c7 c0 ff ff ff 75 e3 4c 89 c0 48 85 ff 74 23 49 8b 01 48 83 ca ff b9 40 00 00 00 29 f9 48 d3 ea 48 21 d0 75 06 <49> 8d 04 38 eb 07 48 0f bc c0 4c 01 c0 c9 c3 55 48 89 f0 48 89 [95198.674692] Call Trace: [95198.674693] [] __x2apic_send_IPI_mask+0xf1/0x113 [95198.674701] [] x2apic_send_IPI_all+0x17/0x19 [95198.674704] [] arch_trigger_all_cpu_backtrace+0x4e/0x71 [95198.674709] [] __rcu_pending+0xab/0x39c [95198.674713] [] rcu_pending+0x27/0x59 [95198.674717] [] rcu_check_callbacks+0x44/0x52 [95198.674722] [] update_process_times+0x3c/0x73 [95198.674725] [] tick_sched_timer+0x72/0x91 [95198.674730] [] __run_hrtimer.clone.24+0x71/0xe7 [95198.674733] [] hrtimer_interrupt+0xcb/0x18e [95198.674738] [] smp_apic_timer_interrupt+0x72/0x85 [95198.674742] [] apic_timer_interrupt+0x67/0x70 [95198.674744] [] ? find_get_pages_tag+0x50/0x12a [95198.674751] [] pagevec_lookup_tag+0x20/0x29 [95198.674755] [] write_cache_pages+0x13a/0x377 [95198.674759] [] ? set_page_dirty+0x5b/0x5b [95198.674763] [] ? ttwu_do_activate.clone.50+0x57/0x5c [95198.674767] [] generic_writepages+0x40/0x57 [95198.674773] [] jbd2_journal_commit_transaction+0x372/0x1145 [jbd2] [95198.674778] [] ? _raw_spin_lock_irqsave+0xd/0x27 [95198.674782] [] ? lock_timer_base.clone.21+0x26/0x4b [95198.674787] [] ? try_to_del_timer_sync+0x7f/0x8a [95198.674793] [] kjournald2+0xc9/0x219 [jbd2] [95198.674796] [] ? wake_up_bit+0x25/0x25 [95198.674802] [] ? freezing+0x17/0x17 [jbd2] [95198.674806] [] kthread+0x84/0x8c [95198.674810] [] kernel_thread_helper+0x4/0x10 [95198.674814] [] ? kthread_freezable_should_stop+0x41/0x41 [95198.674818] [] ? gs_change+0xb/0xb [95198.674821] NMI backtrace for cpu 0 [95198.674823] CPU 0 [95198.674824] Modules linked in: ext4 jbd2 option usb_wwan qmi_wwan usbnet usbserial cdc_wdm usb_storage ppp_async ppp_generic slhc iwlwifi [last unloaded: usb_storage] [95198.674837] [95198.674839] Pid: 24415, comm: vim Not tainted 3.4.0-rc7-default #5 Dell Inc. Vostro 3550/ [95198.674844] RIP: 0033:[<0000000000519e7c>] [<0000000000519e7c>] 0x519e7b [95198.674849] RSP: 002b:00007fffd6088d70 EFLAGS: 00000287 [95198.674851] RAX: 0000000000000003 RBX: 0000000018c6198a RCX: 0000000000000087 [95198.674854] RDX: 0000000003d7d802 RSI: 000000000000003a RDI: 0000000018c6198a [95198.674857] RBP: 0000000018c61a11 R08: 0000000000000000 R09: 0000000000000000 [95198.674859] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000018c61970 [95198.674862] R13: 00007fffd6088dc0 R14: 0000000000000003 R15: 000000000000000c [95198.674865] FS: 00007f378b45e740(0000) GS:ffff88041fa00000(0000) knlGS:0000000000000000 [95198.674868] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [95198.674871] CR2: 000000000052e2e7 CR3: 0000000106830000 CR4: 00000000000407f0 [95198.674874] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [95198.674876] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [95198.674880] Process vim (pid: 24415, threadinfo ffff880107c8a000, task ffff880107e6ad90) [95198.674882] [95198.674883] Call Trace: [95198.674886] NMI backtrace for cpu 3 [95198.674889] CPU 3 [95198.674891] Modules linked in: ext4 jbd2 option usb_wwan qmi_wwan usbnet usbserial cdc_wdm usb_storage ppp_async ppp_generic slhc iwlwifi [last unloaded: usb_storage] [95198.674905] [95198.674908] Pid: 19837, comm: flush-8:48 Not tainted 3.4.0-rc7-default #5 Dell Inc. Vostro 3550/ [95198.674913] RIP: 0010:[] [] find_get_pages_tag+0x55/0x12a [95198.674920] RSP: 0018:ffff8803b9f63960 EFLAGS: 00000282 [95198.674922] RAX: 0000000000000000 RBX: ffff8803b9f63ab8 RCX: ffffea0008540258 [95198.674925] RDX: ffff8801f0d018b8 RSI: 0000000000000003 RDI: ffffea0008540258 [95198.674928] RBP: ffff8803b9f639d0 R08: 000000000003c200 R09: 8140000000000000 [95198.674930] R10: ffff8803b9f639f0 R11: 0000000000000000 R12: 000000000000000e [95198.674933] R13: 0000000000000004 R14: ffff8803b9f63a40 R15: ffff8803b9f63980 [95198.674936] FS: 0000000000000000(0000) GS:ffff88041fb80000(0000) knlGS:0000000000000000 [95198.674939] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [95198.674942] CR2: 00000000028eb000 CR3: 000000000191f000 CR4: 00000000000407e0 [95198.674945] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [95198.674948] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [95198.674951] Process flush-8:48 (pid: 19837, threadinfo ffff8803b9f62000, task ffff8803ba6d26d0) [95198.674953] Stack: [95198.674955] ffffea0008540258 ffff8801f0d018b8 ffff8802e7665e70 0000010073b78b60 [95198.674960] 000000000003c1f8 000000000003c200 00000000000000ff ffff8803b9f63a30 [95198.674964] 0000000000000000 ffff8803b9f63a30 000000000003c1f4 ffff8803b9f63a30 [95198.674969] Call Trace: [95198.674974] [] pagevec_lookup_tag+0x20/0x29 [95198.674984] [] ext4_num_dirty_pages.clone.49+0x71/0x1bd [ext4] [95198.674993] [] ext4_da_writepages+0x153/0x3de [ext4] [95198.675000] [] ? queue_unplugged.clone.37+0x32/0x40 [95198.675006] [] ? blk_finish_plug+0x13/0x34 [95198.675010] [] do_writepages+0x1c/0x25 [95198.675014] [] writeback_single_inode+0xcf/0x232 [95198.675019] [] writeback_sb_inodes+0x169/0x207 [95198.675023] [] __writeback_inodes_wb+0x73/0xb4 [95198.675027] [] wb_writeback+0x102/0x188 [95198.675031] [] ? global_dirtyable_memory+0x18/0x28 [95198.675035] [] wb_do_writeback+0x152/0x16d [95198.675039] [] bdi_writeback_thread+0x88/0x150 [95198.675043] [] ? wb_do_writeback+0x16d/0x16d [95198.675047] [] ? wb_do_writeback+0x16d/0x16d [95198.675051] [] kthread+0x84/0x8c [95198.675056] [] kernel_thread_helper+0x4/0x10 [95198.675060] [] ? kthread_freezable_should_stop+0x41/0x41 [95198.675064] [] ? gs_change+0xb/0xb [95198.675066] Code: 31 ed 89 55 ac 4c 8d 7d b0 48 89 7d a0 48 8b 03 48 c7 45 b0 00 00 00 00 48 89 45 b8 31 d2 e9 89 00 00 00 48 8b 0a 48 85 c9 74 4a c1 03 74 07 80 e1 01 75 d8 0f 0b 48 89 cf 48 89 55 98 48 89 [95198.675106] Call Trace: [95198.675110] [] pagevec_lookup_tag+0x20/0x29 [95198.675118] [] ext4_num_dirty_pages.clone.49+0x71/0x1bd [ext4] [95198.675126] [] ext4_da_writepages+0x153/0x3de [ext4] [95198.675131] [] ? queue_unplugged.clone.37+0x32/0x40 [95198.675135] [] ? blk_finish_plug+0x13/0x34 [95198.675139] [] do_writepages+0x1c/0x25 [95198.675143] [] writeback_single_inode+0xcf/0x232 [95198.675147] [] writeback_sb_inodes+0x169/0x207 [95198.675151] [] __writeback_inodes_wb+0x73/0xb4 [95198.675155] [] wb_writeback+0x102/0x188 [95198.675159] [] ? global_dirtyable_memory+0x18/0x28 [95198.675163] [] wb_do_writeback+0x152/0x16d [95198.675167] [] bdi_writeback_thread+0x88/0x150 [95198.675171] [] ? wb_do_writeback+0x16d/0x16d [95198.675175] [] ? wb_do_writeback+0x16d/0x16d [95198.675178] [] kthread+0x84/0x8c [95198.675183] [] kernel_thread_helper+0x4/0x10 [95198.675187] [] ? kthread_freezable_should_stop+0x41/0x41 [95198.675191] [] ? gs_change+0xb/0xb [95198.675194] NMI backtrace for cpu 1 [95198.675196] CPU 1 [95198.675197] Modules linked in: ext4 jbd2 option usb_wwan qmi_wwan usbnet usbserial cdc_wdm usb_storage ppp_async ppp_generic slhc iwlwifi [last unloaded: usb_storage] [95198.675211] [95198.675214] Pid: 10, comm: ksoftirqd/1 Not tainted 3.4.0-rc7-default #5 Dell Inc. Vostro 3550/ [95198.675219] RIP: 0010:[] [] tg_load_down+0x27/0x5c [95198.675225] RSP: 0018:ffff88040f375c20 EFLAGS: 00000082 [95198.675228] RAX: ffff88041f006160 RBX: ffffffff81c63670 RCX: ffff88040bda7ce8 [95198.675231] RDX: ffffffff81c636e8 RSI: 0000000000000002 RDI: ffff88040bda7c80 [95198.675234] RBP: ffff88040f375c20 R08: 0000000000000000 R09: ffff88041f001cb8 [95198.675238] R10: 0000000000726474 R11: 0000000000007420 R12: ffffffff8109bcb0 [95198.675241] R13: ffffffff81097fc5 R14: ffff88040bda7c80 R15: 0000000000000000 [95198.675244] FS: 0000000000000000(0000) GS:ffff88041fa80000(0000) knlGS:0000000000000000 [95198.675247] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [95198.675250] CR2: 00007f0497045000 CR3: 000000000191f000 CR4: 00000000000407e0 [95198.675253] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [95198.675256] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [95198.675260] Process ksoftirqd/1 (pid: 10, threadinfo ffff88040f374000, task ffff88040f324090) [95198.675262] Stack: [95198.675264] ffff88040f375c80 ffffffff81097f59 0000000000000001 0000000000000002 [95198.675269] 0000000000000001 ffff88040bda7ce8 ffff88040f375c60 ffff88040f0ec840 [95198.675274] ffff88041fa8d750 ffff88041fb10f40 0000000000000000 0000000000000800 [95198.675279] Call Trace: [95198.675284] [] walk_tg_tree_from+0x30/0x9c [95198.675289] [] load_balance+0x277/0x581 [95198.675294] [] idle_balance+0x99/0x111 [95198.675298] [] __schedule+0x20a/0x451 [95198.675302] [] schedule+0x5f/0x61 [95198.675306] [] schedule_preempt_disabled+0x9/0xb [95198.675311] [] run_ksoftirqd+0x50/0x108 [95198.675315] [] ? __do_softirq+0x10d/0x10d [95198.675319] [] kthread+0x84/0x8c [95198.675323] [] kernel_thread_helper+0x4/0x10 [95198.675328] [] ? kthread_freezable_should_stop+0x41/0x41 [95198.675333] [] ? gs_change+0xb/0xb [95198.675335] Code: 75 a0 c9 c3 55 48 8b 47 60 48 89 e5 48 85 c0 75 16 48 c7 c0 40 0f 01 00 48 8b 14 f5 f0 85 99 81 48 8b 44 10 58 eb 26 48 8b 40 28 <48> 8b 4f 20 48 8b 14 f0 48 8b 0c f1 48 8b 82 88 00 00 00 48 0f [95198.675378] Call Trace: [95198.675382] [] walk_tg_tree_from+0x30/0x9c [95198.675386] [] load_balance+0x277/0x581 [95198.675391] [] idle_balance+0x99/0x111 [95198.675395] [] __schedule+0x20a/0x451 [95198.675399] [] schedule+0x5f/0x61 [95198.675403] [] schedule_preempt_disabled+0x9/0xb [95198.675407] [] run_ksoftirqd+0x50/0x108 [95198.675411] [] ? __do_softirq+0x10d/0x10d [95198.675415] [] kthread+0x84/0x8c [95198.675419] [] kernel_thread_helper+0x4/0x10 [95198.675424] [] ? kthread_freezable_should_stop+0x41/0x41 [95198.675428] [] ? gs_change+0xb/0xb [95378.434727] INFO: rcu_sched self-detected stall on CPU { 2} (t=510084 jiffies) [95378.434734] sending NMI to all CPUs: [95378.434738] NMI backtrace for cpu 0 [95378.434740] CPU 0 [95378.434742] Modules linked in: ext4 jbd2 option usb_wwan qmi_wwan usbnet usbserial cdc_wdm usb_storage ppp_async ppp_generic slhc iwlwifi [last unloaded: usb_storage] [95378.434757] [95378.434760] Pid: 0, comm: swapper/0 Not tainted 3.4.0-rc7-default #5 Dell Inc. Vostro 3550/ [95378.434765] RIP: 0010:[] [] hrtimer_start+0x1/0x15 [95378.434774] RSP: 0018:ffff88041fa03f08 EFLAGS: 00000046 [95378.434777] RAX: 7fffffffffffffff RBX: ffff88041fa0d770 RCX: 000056e0f8648400 [95378.434780] RDX: 0000000000000002 RSI: 000056e0f8648400 RDI: ffff88041fa0d770 [95378.434782] RBP: ffff88041fa03f68 R08: 0000000000000000 R09: ffffffff819180b8 [95378.434785] R10: 0000000001273541 R11: 0000000000000086 R12: 0000000100914c09 [95378.434788] R13: 0000000100914cf8 R14: ffff88041fa0ce80 R15: 000056e069f02c26 [95378.434791] FS: 0000000000000000(0000) GS:ffff88041fa00000(0000) knlGS:0000000000000000 [95378.434794] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [95378.434797] CR2: 00007f0497045000 CR3: 000000000191f000 CR4: 00000000000407f0 [95378.434799] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [95378.434802] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [95378.434805] Process swapper/0 (pid: 0, threadinfo ffffffff81914000, task ffffffff81927020) [95378.434807] Stack: [95378.434809] ffff88041fa03f68 ffffffff810ae951 0000000000000046 000000475c9a2000 [95378.434814] 000056e069f00280 00000000000026f1 128f4b22ac2b410e 0000000000000010 [95378.434819] 0000000000000004 ffff88041fa15970 00000000000026f1 128f4b22ac2b410e [95378.434823] Call Trace: [95378.434825] [95378.434832] [] ? tick_nohz_stop_sched_tick.clone.7+0x272/0x2e8 [95378.434836] [] tick_nohz_irq_exit+0x1f/0x21 [95378.434841] [] irq_exit+0x93/0x9a [95378.434845] [] scheduler_ipi+0x6b/0x6d [95378.434850] [] smp_reschedule_interrupt+0x16/0x18 [95378.434855] [] reschedule_interrupt+0x67/0x70 [95378.434858] [95378.434863] [] ? intel_idle+0xdc/0x102 [95378.434867] [] ? intel_idle+0xbb/0x102 [95378.434872] [] cpuidle_enter+0x12/0x14 [95378.434876] [] cpuidle_idle_call+0x7b/0xc4 [95378.434881] [] cpu_idle+0x56/0x7f [95378.434886] [] rest_init+0x6d/0x6f [95378.434890] [] start_kernel+0x33c/0x349 [95378.434894] [] ? repair_env_string+0x56/0x56 [95378.434898] [] x86_64_start_reservations+0xb6/0xbb [95378.434902] [] x86_64_start_kernel+0xf2/0xf9 [95378.434904] Code: 0a bf 08 00 00 00 e8 0e c4 fe ff 48 8b 7b 30 48 8b 75 c8 e8 05 fc ff ff 8b 45 a4 48 83 c4 58 5b 41 5c 41 5d 41 5e 41 5f c9 c3 55 <89> d1 48 89 e5 41 b8 01 00 00 00 31 d2 e8 2d fd ff ff c9 c3 55 [95378.434944] Call Trace: [95378.434945] [] ? tick_nohz_stop_sched_tick.clone.7+0x272/0x2e8 [95378.434952] [] tick_nohz_irq_exit+0x1f/0x21 [95378.434956] [] irq_exit+0x93/0x9a [95378.434959] [] scheduler_ipi+0x6b/0x6d [95378.434963] [] smp_reschedule_interrupt+0x16/0x18 [95378.434967] [] reschedule_interrupt+0x67/0x70 [95378.434969] [] ? intel_idle+0xdc/0x102 [95378.434976] [] ? intel_idle+0xbb/0x102 [95378.434980] [] cpuidle_enter+0x12/0x14 [95378.434983] [] cpuidle_idle_call+0x7b/0xc4 [95378.434987] [] cpu_idle+0x56/0x7f [95378.434991] [] rest_init+0x6d/0x6f [95378.434994] [] start_kernel+0x33c/0x349 [95378.434998] [] ? repair_env_string+0x56/0x56 [95378.435001] [] x86_64_start_reservations+0xb6/0xbb [95378.435005] [] x86_64_start_kernel+0xf2/0xf9 [95378.435008] NMI backtrace for cpu 3 [95378.435011] CPU 3 [95378.435013] Modules linked in: ext4 jbd2 option usb_wwan qmi_wwan usbnet usbserial cdc_wdm usb_storage ppp_async ppp_generic slhc iwlwifi [last unloaded: usb_storage] [95378.435027] [95378.435030] Pid: 19837, comm: flush-8:48 Not tainted 3.4.0-rc7-default #5 Dell Inc. Vostro 3550/ [95378.435035] RIP: 0010:[] [] find_get_pages_tag+0x55/0x12a [95378.435043] RSP: 0018:ffff8803b9f63960 EFLAGS: 00000282 [95378.435045] RAX: 0000000000000000 RBX: ffff8803b9f63ab8 RCX: ffffea0008540258 [95378.435048] RDX: ffff8801f0d018b8 RSI: 0000000000000003 RDI: ffffea0008540258 [95378.435051] RBP: ffff8803b9f639d0 R08: 000000000003c200 R09: 8140000000000000 [95378.435053] R10: ffff8803b9f639f0 R11: 0000000000000000 R12: 000000000000000e [95378.435056] R13: 0000000000000004 R14: ffff8803b9f63a40 R15: ffff8803b9f63980 [95378.435059] FS: 0000000000000000(0000) GS:ffff88041fb80000(0000) knlGS:0000000000000000 [95378.435063] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [95378.435065] CR2: 00000000028eb000 CR3: 000000000191f000 CR4: 00000000000407e0 [95378.435068] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [95378.435071] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [95378.435074] Process flush-8:48 (pid: 19837, threadinfo ffff8803b9f62000, task ffff8803ba6d26d0) [95378.435076] Stack: [95378.435078] ffffea0008540258 ffff8801f0d018b8 ffff8802e7665e70 0000010073b78b60 [95378.435083] 000000000003c1f8 000000000003c200 00000000000000ff ffff8803b9f63a30 [95378.435087] 0000000000000000 ffff8803b9f63a30 000000000003c1f4 ffff8803b9f63a30 [95378.435092] Call Trace: [95378.435098] [] pagevec_lookup_tag+0x20/0x29 [95378.435108] [] ext4_num_dirty_pages.clone.49+0x71/0x1bd [ext4] [95378.435118] [] ext4_da_writepages+0x153/0x3de [ext4] [95378.435124] [] ? queue_unplugged.clone.37+0x32/0x40 [95378.435129] [] ? blk_finish_plug+0x13/0x34 [95378.435133] [] do_writepages+0x1c/0x25 [95378.435138] [] writeback_single_inode+0xcf/0x232 [95378.435142] [] writeback_sb_inodes+0x169/0x207 [95378.435146] [] __writeback_inodes_wb+0x73/0xb4 [95378.435151] [] wb_writeback+0x102/0x188 [95378.435154] [] ? global_dirtyable_memory+0x18/0x28 [95378.435159] [] wb_do_writeback+0x152/0x16d [95378.435163] [] bdi_writeback_thread+0x88/0x150 [95378.435167] [] ? wb_do_writeback+0x16d/0x16d [95378.435171] [] ? wb_do_writeback+0x16d/0x16d [95378.435175] [] kthread+0x84/0x8c [95378.435179] [] kernel_thread_helper+0x4/0x10 [95378.435184] [] ? kthread_freezable_should_stop+0x41/0x41 [95378.435188] [] ? gs_change+0xb/0xb [95378.435190] Code: 31 ed 89 55 ac 4c 8d 7d b0 48 89 7d a0 48 8b 03 48 c7 45 b0 00 00 00 00 48 89 45 b8 31 d2 e9 89 00 00 00 48 8b 0a 48 85 c9 74 4a c1 03 74 07 80 e1 01 75 d8 0f 0b 48 89 cf 48 89 55 98 48 89 [95378.435230] Call Trace: [95378.435234] [] pagevec_lookup_tag+0x20/0x29 [95378.435241] [] ext4_num_dirty_pages.clone.49+0x71/0x1bd [ext4] [95378.435250] [] ext4_da_writepages+0x153/0x3de [ext4] [95378.435254] [] ? queue_unplugged.clone.37+0x32/0x40 [95378.435259] [] ? blk_finish_plug+0x13/0x34 [95378.435263] [] do_writepages+0x1c/0x25 [95378.435267] [] writeback_single_inode+0xcf/0x232 [95378.435271] [] writeback_sb_inodes+0x169/0x207 [95378.435275] [] __writeback_inodes_wb+0x73/0xb4 [95378.435279] [] wb_writeback+0x102/0x188 [95378.435282] [] ? global_dirtyable_memory+0x18/0x28 [95378.435287] [] wb_do_writeback+0x152/0x16d [95378.435291] [] bdi_writeback_thread+0x88/0x150 [95378.435295] [] ? wb_do_writeback+0x16d/0x16d [95378.435298] [] ? wb_do_writeback+0x16d/0x16d [95378.435302] [] kthread+0x84/0x8c [95378.435306] [] kernel_thread_helper+0x4/0x10 [95378.435311] [] ? kthread_freezable_should_stop+0x41/0x41 [95378.435315] [] ? gs_change+0xb/0xb [95378.435317] NMI backtrace for cpu 2 [95378.435318] CPU 2 [95378.435319] Modules linked in: ext4 jbd2 option usb_wwan qmi_wwan usbnet usbserial cdc_wdm usb_storage ppp_async ppp_generic slhc iwlwifi [last unloaded: usb_storage] [95378.435328] [95378.435330] Pid: 19832, comm: jbd2/sdd1-8 Not tainted 3.4.0-rc7-default #5 Dell Inc. Vostro 3550/ [95378.435333] RIP: 0010:[] [] find_next_bit+0x91/0x9c [95378.435338] RSP: 0018:ffff88041fb03d68 EFLAGS: 00000046 [95378.435340] RAX: 0000000000000004 RBX: ffff88041fb0cf40 RCX: 000000000000003c [95378.435342] RDX: 000000000000000f RSI: 0000000000000004 RDI: 0000000000000004 [95378.435344] RBP: ffff88041fb03d68 R08: 0000000000000000 R09: ffff88041fb0cf40 [95378.435346] R10: ffff88049fb03d07 R11: 0000000000000000 R12: 0000000000000001 [95378.435348] R13: 000000000000000f R14: 000000000000cf50 R15: 000000000000cf48 [95378.435350] FS: 0000000000000000(0000) GS:ffff88041fb00000(0000) knlGS:0000000000000000 [95378.435353] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [95378.435355] CR2: 0000000002c80000 CR3: 000000000191f000 CR4: 00000000000407e0 [95378.435356] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [95378.435359] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [95378.435361] Process jbd2/sdd1-8 (pid: 19832, threadinfo ffff880102622000, task ffff8803bbc72c90) [95378.435363] Stack: [95378.435364] ffff88041fb03dc8 ffffffff81047c05 0000000000000002 0000000200080000 [95378.435367] ffff88041fa0cf48 0000000000000096 ffff88041fb03da8 0000000000002710 [95378.435370] ffffffff81938600 ffffffff81938600 0000000000000001 7fffffffffffffff [95378.435374] Call Trace: [95378.435375] [95378.435379] [] __x2apic_send_IPI_mask+0xf1/0x113 [95378.435382] [] x2apic_send_IPI_all+0x17/0x19 [95378.435385] [] arch_trigger_all_cpu_backtrace+0x4e/0x71 [95378.435390] [] __rcu_pending+0xab/0x39c [95378.435394] [] rcu_pending+0x27/0x59 [95378.435397] [] rcu_check_callbacks+0x44/0x52 [95378.435401] [] update_process_times+0x3c/0x73 [95378.435404] [] tick_sched_timer+0x72/0x91 [95378.435407] [] __run_hrtimer.clone.24+0x71/0xe7 [95378.435410] [] hrtimer_interrupt+0xcb/0x18e [95378.435414] [