[3099758.063591] [] do_vfs_ioctl+0x2cd/0x4b0 [3099758.063593] [] ? __do_page_fault+0x1b6/0x430 [3099758.063595] [] SyS_ioctl+0x79/0x90 [3099758.063596] [] entry_SYSCALL_64_fastpath+0x16/0x75 [3099758.063597] Code: 00 00 00 f0 0f b1 17 85 c0 75 ef b0 01 5d c3 66 66 66 2e 0f 1f 84 00 00 00 00 00 66 66 66 66 90 31 c0 ba 01 00 00 00 f0 0f b1 17 <85> c0 75 01 c3 55 89 c6 48 89 e5 e8 cf 29 ff ff 5d c3 66 66 66 [3099786.075760] NMI watchdog: BUG: soft lockup - CPU#3 stuck for 22s! [btrfs:27516] [3099786.076424] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c intel_rapl w83627ehf x86_pkg_temp_thermal intel_powerclamp hwmon_vid coretemp kvm_intel kvm snd_hda_codec_realtek snd_hda_codec_generic lp joydev input_leds ppdev gpio_ich 8250_fintek parport_pc parport nuvoton_cir rc_core mac_hid snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd lpc_ich mei_me soundcore mei shpchp serio_raw btrfs drbg ansi_cprng dm_crypt raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid0 multipath linear raid1 crct10dif_pclmul crc32_pclmul hid_generic i915 aesni_intel ahci aes_x86_64 lrw usbhid video gf128mul i2c_algo_bit glue_helper e1000e ablk_helper drm_kms_helper libahci ptp cryptd hid psmouse pps_core drm pata_acpi [3099786.076454] CPU: 3 PID: 27516 Comm: btrfs Tainted: G U W L 4.2.0-27-generic #32~14.04.1-Ubuntu [3099786.076455] Hardware name: /DQ67OW, BIOS SWQ6710H.86A.0067.2014.0313.1347 03/13/2014 [3099786.076456] task: ffff8800aca0a940 ti: ffff880110c5c000 task.ti: ffff880110c5c000 [3099786.076457] RIP: 0010:[] [] _raw_spin_lock+0x10/0x30 [3099786.076461] RSP: 0018:ffff880110c5fa50 EFLAGS: 00000246 [3099786.076462] RAX: 0000000000000000 RBX: 00000000ffffffe2 RCX: 00000000ffffffe2 [3099786.076463] RDX: 0000000000000001 RSI: ffffffffc034e280 RDI: ffff88002a9e8d70 [3099786.076464] RBP: ffff880110c5fa78 R08: 0000000000000000 R09: 00000000ffffffe2 [3099786.076464] R10: ffffffffc02a912a R11: ffffea00029bc9c0 R12: 000000002b4bf801 [3099786.076465] R13: ffff88042b4bf800 R14: ffff8800a6f277e0 R15: ffff88042b4bf900 [3099786.076466] FS: 00007f93651f0880(0000) GS:ffff88043e2c0000(0000) knlGS:0000000000000000 [3099786.076467] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [3099786.076468] CR2: 0000559c1ffff7d0 CR3: 00000002fca04000 CR4: 00000000000406e0 [3099786.076469] Stack: [3099786.076470] ffffffffc031f930 ffff880110c5fab8 ffff88002a9e8800 ffff88042b52b000 [3099786.076471] ffff880110c5fab8 ffff880110c5fa98 ffffffffc031fa25 ffff88042b4bfbc0 [3099786.076472] ffff88042b4bfbc0 ffff880110c5faf8 ffffffffc0325f2a ffff88002a9e8d78 [3099786.076474] Call Trace: [3099786.076486] [] ? __del_reloc_root+0x30/0x100 [btrfs] [3099786.076493] [] free_reloc_roots+0x25/0x40 [btrfs] [3099786.076499] [] merge_reloc_roots+0x16a/0x230 [btrfs] [3099786.076505] [] relocate_block_group+0x256/0x600 [btrfs] [3099786.076511] [] btrfs_relocate_block_group+0x1c3/0x2d0 [btrfs] [3099786.076518] [] btrfs_relocate_chunk.isra.39+0x3e/0xc0 [btrfs] [3099786.076525] [] __btrfs_balance+0x48f/0x8c0 [btrfs] [3099786.076531] [] btrfs_balance+0x37d/0x650 [btrfs] [3099786.076538] [] ? btrfs_ioctl_balance+0x282/0x530 [btrfs] [3099786.076544] [] btrfs_ioctl_balance+0x3f6/0x530 [btrfs] [3099786.076550] [] btrfs_ioctl+0x56f/0x2470 [btrfs] [3099786.076553] [] ? lru_cache_add_active_or_unevictable+0x2b/0xa0 [3099786.076555] [] ? handle_mm_fault+0xba5/0x1840 [3099786.076557] [] do_vfs_ioctl+0x2cd/0x4b0 [3099786.076559] [] ? __do_page_fault+0x1b6/0x430 [3099786.076561] [] SyS_ioctl+0x79/0x90 [3099786.076562] [] entry_SYSCALL_64_fastpath+0x16/0x75 [3099786.076563] Code: 00 00 00 f0 0f b1 17 85 c0 75 ef b0 01 5d c3 66 66 66 2e 0f 1f 84 00 00 00 00 00 66 66 66 66 90 31 c0 ba 01 00 00 00 f0 0f b1 17 <85> c0 75 01 c3 55 89 c6 48 89 e5 e8 cf 29 ff ff 5d c3 66 66 66 [3099814.088753] NMI watchdog: BUG: soft lockup - CPU#3 stuck for 22s! [btrfs:27516] [3099814.089403] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c intel_rapl w83627ehf x86_pkg_temp_thermal intel_powerclamp hwmon_vid coretemp kvm_intel kvm snd_hda_codec_realtek snd_hda_codec_generic lp joydev input_leds ppdev gpio_ich 8250_fintek parport_pc parport nuvoton_cir rc_core mac_hid snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd lpc_ich mei_me soundcore mei shpchp serio_raw btrfs drbg ansi_cprng dm_crypt raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid0 multipath linear raid1 crct10dif_pclmul crc32_pclmul hid_generic i915 aesni_intel ahci aes_x86_64 lrw usbhid video gf128mul i2c_algo_bit glue_helper e1000e ablk_helper drm_kms_helper libahci ptp cryptd hid psmouse pps_core drm pata_acpi [3099814.089436] CPU: 3 PID: 27516 Comm: btrfs Tainted: G U W L 4.2.0-27-generic #32~14.04.1-Ubuntu [3099814.089437] Hardware name: /DQ67OW, BIOS SWQ6710H.86A.0067.2014.0313.1347 03/13/2014 [3099814.089438] task: ffff8800aca0a940 ti: ffff880110c5c000 task.ti: ffff880110c5c000 [3099814.089438] RIP: 0010:[] [] __del_reloc_root+0xd1/0x100 [btrfs] [3099814.089451] RSP: 0018:ffff880110c5fa60 EFLAGS: 00000246 [3099814.089452] RAX: ffff880142cd36f8 RBX: ffffffffc02a912a RCX: 00000000ffffffe2 [3099814.089453] RDX: 000007ba9c902000 RSI: ffffffffc034e280 RDI: ffff88002a9e8d70 [3099814.089454] RBP: ffff880110c5fa78 R08: 0000000000000000 R09: 00000000ffffffe2 [3099814.089454] R10: ffffffffc02a912a R11: ffffea00029bc9c0 R12: 00000000ffffffe2 [3099814.089455] R13: ffff880110c5fa78 R14: 000000002b4bf801 R15: ffff88042b4bf800 [3099814.089456] FS: 00007f93651f0880(0000) GS:ffff88043e2c0000(0000) knlGS:0000000000000000 [3099814.089457] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [3099814.089458] CR2: 0000559c1ffff7d0 CR3: 00000002fca04000 CR4: 00000000000406e0 [3099814.089459] Stack: [3099814.089460] ffff88002a9e8800 ffff88042b52b000 ffff880110c5fab8 ffff880110c5fa98 [3099814.089461] ffffffffc031fa25 ffff88042b4bfbc0 ffff88042b4bfbc0 ffff880110c5faf8 [3099814.089462] ffffffffc0325f2a ffff88002a9e8d78 000000002a9e8d78 ffff88042b4bdbc0 [3099814.089464] Call Trace: [3099814.089471] [] free_reloc_roots+0x25/0x40 [btrfs] [3099814.089477] [] merge_reloc_roots+0x16a/0x230 [btrfs] [3099814.089483] [] relocate_block_group+0x256/0x600 [btrfs] [3099814.089489] [] btrfs_relocate_block_group+0x1c3/0x2d0 [btrfs] [3099814.089496] [] btrfs_relocate_chunk.isra.39+0x3e/0xc0 [btrfs] [3099814.089502] [] __btrfs_balance+0x48f/0x8c0 [btrfs] [3099814.089509] [] btrfs_balance+0x37d/0x650 [btrfs] [3099814.089516] [] ? btrfs_ioctl_balance+0x282/0x530 [btrfs] [3099814.089522] [] btrfs_ioctl_balance+0x3f6/0x530 [btrfs] [3099814.089528] [] btrfs_ioctl+0x56f/0x2470 [btrfs] [3099814.089532] [] ? lru_cache_add_active_or_unevictable+0x2b/0xa0 [3099814.089534] [] ? handle_mm_fault+0xba5/0x1840 [3099814.089536] [] do_vfs_ioctl+0x2cd/0x4b0 [3099814.089539] [] ? __do_page_fault+0x1b6/0x430 [3099814.089541] [] SyS_ioctl+0x79/0x90 [3099814.089543] [] entry_SYSCALL_64_fastpath+0x16/0x75 [3099814.089543] Code: f0 01 00 00 49 89 84 24 c0 03 00 00 49 89 84 24 c8 03 00 00 48 81 c7 38 09 00 00 c6 07 00 66 66 66 90 48 89 df e8 b0 d3 ea c0 5b <41> 5c 41 5d 41 5e 5d c3 76 09 48 8b 5b 08 e9 5a ff ff ff 49 8d [3099842.101747] NMI watchdog: BUG: soft lockup - CPU#3 stuck for 22s! [btrfs:27516] [3099842.102401] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c intel_rapl w83627ehf x86_pkg_temp_thermal intel_powerclamp hwmon_vid coretemp kvm_intel kvm snd_hda_codec_realtek snd_hda_codec_generic lp joydev input_leds ppdev gpio_ich 8250_fintek parport_pc parport nuvoton_cir rc_core mac_hid snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd lpc_ich mei_me soundcore mei shpchp serio_raw btrfs drbg ansi_cprng dm_crypt raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid0 multipath linear raid1 crct10dif_pclmul crc32_pclmul hid_generic i915 aesni_intel ahci aes_x86_64 lrw usbhid video gf128mul i2c_algo_bit glue_helper e1000e ablk_helper drm_kms_helper libahci ptp cryptd hid psmouse pps_core drm pata_acpi [3099842.102434] CPU: 3 PID: 27516 Comm: btrfs Tainted: G U W L 4.2.0-27-generic #32~14.04.1-Ubuntu [3099842.102435] Hardware name: /DQ67OW, BIOS SWQ6710H.86A.0067.2014.0313.1347 03/13/2014 [3099842.102436] task: ffff8800aca0a940 ti: ffff880110c5c000 task.ti: ffff880110c5c000 [3099842.102437] RIP: 0010:[] [] _raw_spin_lock+0x10/0x30 [3099842.102442] RSP: 0018:ffff880110c5fa50 EFLAGS: 00000246 [3099842.102442] RAX: 0000000000000000 RBX: 00000000ffffffe2 RCX: 00000000ffffffe2 [3099842.102443] RDX: 0000000000000001 RSI: ffffffffc034e280 RDI: ffff88002a9e8d70 [3099842.102444] RBP: ffff880110c5fa78 R08: 0000000000000000 R09: 00000000ffffffe2 [3099842.102445] R10: ffffffffc02a912a R11: ffffea00029bc9c0 R12: 000000002b4bf801 [3099842.102446] R13: ffff88042b4bf800 R14: ffff8800a6f277e0 R15: ffff88042b4bf900 [3099842.102447] FS: 00007f93651f0880(0000) GS:ffff88043e2c0000(0000) knlGS:0000000000000000 [3099842.102448] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [3099842.102448] CR2: 0000559c1ffff7d0 CR3: 00000002fca04000 CR4: 00000000000406e0 [3099842.102449] Stack: [3099842.102450] ffffffffc031f930 ffff880110c5fab8 ffff88002a9e8800 ffff88042b52b000 [3099842.102451] ffff880110c5fab8 ffff880110c5fa98 ffffffffc031fa25 ffff88042b4bfbc0 [3099842.102453] ffff88042b4bfbc0 ffff880110c5faf8 ffffffffc0325f2a ffff88002a9e8d78 [3099842.102454] Call Trace: [3099842.102467] [] ? __del_reloc_root+0x30/0x100 [btrfs] [3099842.102475] [] free_reloc_roots+0x25/0x40 [btrfs] [3099842.102481] [] merge_reloc_roots+0x16a/0x230 [btrfs] [3099842.102487] [] relocate_block_group+0x256/0x600 [btrfs] [3099842.102493] [] btrfs_relocate_block_group+0x1c3/0x2d0 [btrfs] [3099842.102500] [] btrfs_relocate_chunk.isra.39+0x3e/0xc0 [btrfs] [3099842.102507] [] __btrfs_balance+0x48f/0x8c0 [btrfs] [3099842.102514] [] btrfs_balance+0x37d/0x650 [btrfs] [3099842.102520] [] ? btrfs_ioctl_balance+0x282/0x530 [btrfs] [3099842.102526] [] btrfs_ioctl_balance+0x3f6/0x530 [btrfs] [3099842.102533] [] btrfs_ioctl+0x56f/0x2470 [btrfs] [3099842.102536] [] ? lru_cache_add_active_or_unevictable+0x2b/0xa0 [3099842.102538] [] ? handle_mm_fault+0xba5/0x1840 [3099842.102540] [] do_vfs_ioctl+0x2cd/0x4b0 [3099842.102543] [] ? __do_page_fault+0x1b6/0x430 [3099842.102544] [] SyS_ioctl+0x79/0x90 [3099842.102546] [] entry_SYSCALL_64_fastpath+0x16/0x75 [3099842.102546] Code: 00 00 00 f0 0f b1 17 85 c0 75 ef b0 01 5d c3 66 66 66 2e 0f 1f 84 00 00 00 00 00 66 66 66 66 90 31 c0 ba 01 00 00 00 f0 0f b1 17 <85> c0 75 01 c3 55 89 c6 48 89 e5 e8 cf 29 ff ff 5d c3 66 66 66 [3099855.848122] INFO: rcu_sched self-detected stall on CPU { 3} (t=17656176 jiffies g=20208670 c=20208669 q=0) [3099855.848801] Task dump for CPU 3: [3099855.848802] btrfs R running task 0 27516 25625 0x0000000c [3099855.848804] ffffffff81c52c40 ffff88043e2c3d88 ffffffff810a303f 0000000000000003 [3099855.848806] ffffffff81c52c40 ffff88043e2c3da8 ffffffff810a579d 0000000000000083 [3099855.848807] 0000000000000004 ffff88043e2c3dd8 ffffffff810d7724 ffff88043e2d74c0 [3099855.848808] Call Trace: [3099855.848809] [] sched_show_task+0xaf/0x110 [3099855.848816] [] dump_cpu_task+0x3d/0x50 [3099855.848818] [] rcu_dump_cpu_stacks+0x84/0xc0 [3099855.848820] [] rcu_check_callbacks+0x44a/0x720 [3099855.848822] [] ? account_process_tick+0x61/0x170 [3099855.848825] [] ? tick_sched_do_timer+0x30/0x30 [3099855.848826] [] update_process_times+0x39/0x60 [3099855.848828] [] tick_sched_handle.isra.15+0x25/0x60 [3099855.848829] [] tick_sched_timer+0x44/0x80 [3099855.848831] [] __hrtimer_run_queues+0xe4/0x200 [3099855.848832] [] hrtimer_interrupt+0xa8/0x1a0 [3099855.848834] [] local_apic_timer_interrupt+0x39/0x60 [3099855.848837] [] smp_apic_timer_interrupt+0x45/0x60 [3099855.848838] [] apic_timer_interrupt+0x6b/0x70 [3099855.848839] [] ? btrfs_free_path+0x2a/0x40 [btrfs] [3099855.848855] [] ? __del_reloc_root+0x28/0x100 [btrfs] [3099855.848861] [] ? __del_reloc_root+0x30/0x100 [btrfs] [3099855.848867] [] free_reloc_roots+0x25/0x40 [btrfs] [3099855.848873] [] merge_reloc_roots+0x16a/0x230 [btrfs] [3099855.848879] [] relocate_block_group+0x256/0x600 [btrfs] [3099855.848885] [] btrfs_relocate_block_group+0x1c3/0x2d0 [btrfs] [3099855.848892] [] btrfs_relocate_chunk.isra.39+0x3e/0xc0 [btrfs] [3099855.848898] [] __btrfs_balance+0x48f/0x8c0 [btrfs] [3099855.848905] [] btrfs_balance+0x37d/0x650 [btrfs] [3099855.848911] [] ? btrfs_ioctl_balance+0x282/0x530 [btrfs] [3099855.848918] [] btrfs_ioctl_balance+0x3f6/0x530 [btrfs] [3099855.848924] [] btrfs_ioctl+0x56f/0x2470 [btrfs] [3099855.848926] [] ? lru_cache_add_active_or_unevictable+0x2b/0xa0 [3099855.848928] [] ? handle_mm_fault+0xba5/0x1840 [3099855.848930] [] do_vfs_ioctl+0x2cd/0x4b0 [3099855.848932] [] ? __do_page_fault+0x1b6/0x430 [3099855.848934] [] SyS_ioctl+0x79/0x90 [3099855.848935] [] entry_SYSCALL_64_fastpath+0x16/0x75 [3099882.120308] NMI watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [btrfs:27516] [3099882.120996] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c intel_rapl w83627ehf x86_pkg_temp_thermal intel_powerclamp hwmon_vid coretemp kvm_intel kvm snd_hda_codec_realtek snd_hda_codec_generic lp joydev input_leds ppdev gpio_ich 8250_fintek parport_pc parport nuvoton_cir rc_core mac_hid snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd lpc_ich mei_me soundcore mei shpchp serio_raw btrfs drbg ansi_cprng dm_crypt raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid0 multipath linear raid1 crct10dif_pclmul crc32_pclmul hid_generic i915 aesni_intel ahci aes_x86_64 lrw usbhid video gf128mul i2c_algo_bit glue_helper e1000e ablk_helper drm_kms_helper libahci ptp cryptd hid psmouse pps_core drm pata_acpi [3099882.121029] CPU: 3 PID: 27516 Comm: btrfs Tainted: G U W L 4.2.0-27-generic #32~14.04.1-Ubuntu [3099882.121030] Hardware name: /DQ67OW, BIOS SWQ6710H.86A.0067.2014.0313.1347 03/13/2014 [3099882.121031] task: ffff8800aca0a940 ti: ffff880110c5c000 task.ti: ffff880110c5c000 [3099882.121032] RIP: 0010:[] [] _raw_spin_lock+0x10/0x30 [3099882.121036] RSP: 0018:ffff880110c5fa50 EFLAGS: 00000246 [3099882.121037] RAX: 0000000000000000 RBX: 00000000ffffffe2 RCX: 00000000ffffffe2 [3099882.121038] RDX: 0000000000000001 RSI: ffffffffc034e280 RDI: ffff88002a9e8d70 [3099882.121039] RBP: ffff880110c5fa78 R08: 0000000000000000 R09: 00000000ffffffe2 [3099882.121040] R10: ffffffffc02a912a R11: ffffea00029bc9c0 R12: 000000002b4bf801 [3099882.121040] R13: ffff88042b4bf800 R14: ffff8800a6f277e0 R15: ffff88042b4bf900 [3099882.121041] FS: 00007f93651f0880(0000) GS:ffff88043e2c0000(0000) knlGS:0000000000000000 [3099882.121042] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [3099882.121043] CR2: 0000559c1ffff7d0 CR3: 00000002fca04000 CR4: 00000000000406e0 [3099882.121044] Stack: [3099882.121045] ffffffffc031f930 ffff880110c5fab8 ffff88002a9e8800 ffff88042b52b000 [3099882.121047] ffff880110c5fab8 ffff880110c5fa98 ffffffffc031fa25 ffff88042b4bfbc0 [3099882.121048] ffff88042b4bfbc0 ffff880110c5faf8 ffffffffc0325f2a ffff88002a9e8d78 [3099882.121049] Call Trace: [3099882.121063] [] ? __del_reloc_root+0x30/0x100 [btrfs] [3099882.121070] [] free_reloc_roots+0x25/0x40 [btrfs] [3099882.121076] [] merge_reloc_roots+0x16a/0x230 [btrfs] [3099882.121082] [] relocate_block_group+0x256/0x600 [btrfs] [3099882.121088] [] btrfs_relocate_block_group+0x1c3/0x2d0 [btrfs] [3099882.121095] [] btrfs_relocate_chunk.isra.39+0x3e/0xc0 [btrfs] [3099882.121102] [] __btrfs_balance+0x48f/0x8c0 [btrfs] [3099882.121108] [] btrfs_balance+0x37d/0x650 [btrfs] [3099882.121115] [] ? btrfs_ioctl_balance+0x282/0x530 [btrfs] [3099882.121121] [] btrfs_ioctl_balance+0x3f6/0x530 [btrfs] [3099882.121128] [] btrfs_ioctl+0x56f/0x2470 [btrfs] [3099882.121130] [] ? lru_cache_add_active_or_unevictable+0x2b/0xa0 [3099882.121132] [] ? handle_mm_fault+0xba5/0x1840 [3099882.121135] [] do_vfs_ioctl+0x2cd/0x4b0 [3099882.121137] [] ? __do_page_fault+0x1b6/0x430 [3099882.121138] [] SyS_ioctl+0x79/0x90 [3099882.121140] [] entry_SYSCALL_64_fastpath+0x16/0x75 [3099882.121141] Code: 00 00 00 f0 0f b1 17 85 c0 75 ef b0 01 5d c3 66 66 66 2e 0f 1f 84 00 00 00 00 00 66 66 66 66 90 31 c0 ba 01 00 00 00 f0 0f b1 17 <85> c0 75 01 c3 55 89 c6 48 89 e5 e8 cf 29 ff ff 5d c3 66 66 66 [3099910.133301] NMI watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [btrfs:27516] [3099910.133985] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c intel_rapl w83627ehf x86_pkg_temp_thermal intel_powerclamp hwmon_vid coretemp kvm_intel kvm snd_hda_codec_realtek snd_hda_codec_generic lp joydev input_leds ppdev gpio_ich 8250_fintek parport_pc parport nuvoton_cir rc_core mac_hid snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd lpc_ich mei_me soundcore mei shpchp serio_raw btrfs drbg ansi_cprng dm_crypt raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid0 multipath linear raid1 crct10dif_pclmul crc32_pclmul hid_generic i915 aesni_intel ahci aes_x86_64 lrw usbhid video gf128mul i2c_algo_bit glue_helper e1000e ablk_helper drm_kms_helper libahci ptp cryptd hid psmouse pps_core drm pata_acpi [3099910.134015] CPU: 3 PID: 27516 Comm: btrfs Tainted: G U W L 4.2.0-27-generic #32~14.04.1-Ubuntu [3099910.134016] Hardware name: /DQ67OW, BIOS SWQ6710H.86A.0067.2014.0313.1347 03/13/2014 [3099910.134017] task: ffff8800aca0a940 ti: ffff880110c5c000 task.ti: ffff880110c5c000 [3099910.134018] RIP: 0010:[] [] _raw_spin_lock+0x10/0x30 [3099910.134021] RSP: 0018:ffff880110c5fa50 EFLAGS: 00000246 [3099910.134022] RAX: 0000000000000000 RBX: 00000000ffffffe2 RCX: 00000000ffffffe2 [3099910.134023] RDX: 0000000000000001 RSI: ffffffffc034e280 RDI: ffff88002a9e8d70 [3099910.134024] RBP: ffff880110c5fa78 R08: 0000000000000000 R09: 00000000ffffffe2 [3099910.134025] R10: ffffffffc02a912a R11: ffffea00029bc9c0 R12: 000000002b4bf801 [3099910.134025] R13: ffff88042b4bf800 R14: ffff8800a6f277e0 R15: ffff88042b4bf900 [3099910.134027] FS: 00007f93651f0880(0000) GS:ffff88043e2c0000(0000) knlGS:0000000000000000 [3099910.134028] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [3099910.134028] CR2: 0000559c1ffff7d0 CR3: 00000002fca04000 CR4: 00000000000406e0 [3099910.134029] Stack: [3099910.134030] ffffffffc031f930 ffff880110c5fab8 ffff88002a9e8800 ffff88042b52b000 [3099910.134031] ffff880110c5fab8 ffff880110c5fa98 ffffffffc031fa25 ffff88042b4bfbc0 [3099910.134033] ffff88042b4bfbc0 ffff880110c5faf8 ffffffffc0325f2a ffff88002a9e8d78 [3099910.134034] Call Trace: [3099910.134046] [] ? __del_reloc_root+0x30/0x100 [btrfs] [3099910.134052] [] free_reloc_roots+0x25/0x40 [btrfs] [3099910.134058] [] merge_reloc_roots+0x16a/0x230 [btrfs] [3099910.134064] [] relocate_block_group+0x256/0x600 [btrfs] [3099910.134070] [] btrfs_relocate_block_group+0x1c3/0x2d0 [btrfs] [3099910.134077] [] btrfs_relocate_chunk.isra.39+0x3e/0xc0 [btrfs] [3099910.134084] [] __btrfs_balance+0x48f/0x8c0 [btrfs] [3099910.134090] [] btrfs_balance+0x37d/0x650 [btrfs] [3099910.134097] [] ? btrfs_ioctl_balance+0x282/0x530 [btrfs] [3099910.134103] [] btrfs_ioctl_balance+0x3f6/0x530 [btrfs] [3099910.134109] [] btrfs_ioctl+0x56f/0x2470 [btrfs] [3099910.134112] [] ? lru_cache_add_active_or_unevictable+0x2b/0xa0 [3099910.134113] [] ? handle_mm_fault+0xba5/0x1840 [3099910.134116] [] do_vfs_ioctl+0x2cd/0x4b0 [3099910.134118] [] ? __do_page_fault+0x1b6/0x430 [3099910.134119] [] SyS_ioctl+0x79/0x90 [3099910.134121] [] entry_SYSCALL_64_fastpath+0x16/0x75 [3099910.134122] Code: 00 00 00 f0 0f b1 17 85 c0 75 ef b0 01 5d c3 66 66 66 2e 0f 1f 84 00 00 00 00 00 66 66 66 66 90 31 c0 ba 01 00 00 00 f0 0f b1 17 <85> c0 75 01 c3 55 89 c6 48 89 e5 e8 cf 29 ff ff 5d c3 66 66 66 [3099938.146294] NMI watchdog: BUG: soft lockup - CPU#3 stuck for 22s! [btrfs:27516] [3099938.146978] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c intel_rapl w83627ehf x86_pkg_temp_thermal intel_powerclamp hwmon_vid coretemp kvm_intel kvm snd_hda_codec_realtek snd_hda_codec_generic lp joydev input_leds ppdev gpio_ich 8250_fintek parport_pc parport nuvoton_cir rc_core mac_hid snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd lpc_ich mei_me soundcore mei shpchp serio_raw btrfs drbg ansi_cprng dm_crypt raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid0 multipath linear raid1 crct10dif_pclmul crc32_pclmul hid_generic i915 aesni_intel ahci aes_x86_64 lrw usbhid video gf128mul i2c_algo_bit glue_helper e1000e ablk_helper drm_kms_helper libahci ptp cryptd hid psmouse pps_core drm pata_acpi [3099938.147011] CPU: 3 PID: 27516 Comm: btrfs Tainted: G U W L 4.2.0-27-generic #32~14.04.1-Ubuntu [3099938.147012] Hardware name: /DQ67OW, BIOS SWQ6710H.86A.0067.2014.0313.1347 03/13/2014 [3099938.147013] task: ffff8800aca0a940 ti: ffff880110c5c000 task.ti: ffff880110c5c000 [3099938.147014] RIP: 0010:[] [] _raw_spin_lock+0x10/0x30 [3099938.147018] RSP: 0018:ffff880110c5fa50 EFLAGS: 00000246 [3099938.147019] RAX: 0000000000000000 RBX: 00000000ffffffe2 RCX: 00000000ffffffe2 [3099938.147020] RDX: 0000000000000001 RSI: ffffffffc034e280 RDI: ffff88002a9e8d70 [3099938.147021] RBP: ffff880110c5fa78 R08: 0000000000000000 R09: 00000000ffffffe2 [3099938.147022] R10: ffffffffc02a912a R11: ffffea00029bc9c0 R12: 000000002b4bf801 [3099938.147023] R13: ffff88042b4bf800 R14: ffff8800a6f277e0 R15: ffff88042b4bf900 [3099938.147024] FS: 00007f93651f0880(0000) GS:ffff88043e2c0000(0000) knlGS:0000000000000000 [3099938.147025] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [3099938.147025] CR2: 0000559c1ffff7d0 CR3: 00000002fca04000 CR4: 00000000000406e0 [3099938.147026] Stack: [3099938.147027] ffffffffc031f930 ffff880110c5fab8 ffff88002a9e8800 ffff88042b52b000 [3099938.147028] ffff880110c5fab8 ffff880110c5fa98 ffffffffc031fa25 ffff88042b4bfbc0 [3099938.147029] ffff88042b4bfbc0 ffff880110c5faf8 ffffffffc0325f2a ffff88002a9e8d78 [3099938.147031] Call Trace: [3099938.147044] [] ? __del_reloc_root+0x30/0x100 [btrfs] [3099938.147051] [] free_reloc_roots+0x25/0x40 [btrfs] [3099938.147057] [] merge_reloc_roots+0x16a/0x230 [btrfs] [3099938.147063] [] relocate_block_group+0x256/0x600 [btrfs] [3099938.147069] [] btrfs_relocate_block_group+0x1c3/0x2d0 [btrfs] [3099938.147076] [] btrfs_relocate_chunk.isra.39+0x3e/0xc0 [btrfs] [3099938.147082] [] __btrfs_balance+0x48f/0x8c0 [btrfs] [3099938.147089] [] btrfs_balance+0x37d/0x650 [btrfs] [3099938.147095] [] ? btrfs_ioctl_balance+0x282/0x530 [btrfs] [3099938.147101] [] btrfs_ioctl_balance+0x3f6/0x530 [btrfs] [3099938.147108] [] btrfs_ioctl+0x56f/0x2470 [btrfs] [3099938.147110] [] ? lru_cache_add_active_or_unevictable+0x2b/0xa0 [3099938.147112] [] ? handle_mm_fault+0xba5/0x1840 [3099938.147115] [] do_vfs_ioctl+0x2cd/0x4b0 [3099938.147117] [] ? __do_page_fault+0x1b6/0x430 [3099938.147119] [] SyS_ioctl+0x79/0x90 [3099938.147120] [] entry_SYSCALL_64_fastpath+0x16/0x75 [3099938.147121] Code: 00 00 00 f0 0f b1 17 85 c0 75 ef b0 01 5d c3 66 66 66 2e 0f 1f 84 00 00 00 00 00 66 66 66 66 90 31 c0 ba 01 00 00 00 f0 0f b1 17 <85> c0 75 01 c3 55 89 c6 48 89 e5 e8 cf 29 ff ff 5d c3 66 66 66 [3099966.159287] NMI watchdog: BUG: soft lockup - CPU#3 stuck for 22s! [btrfs:27516] [3099966.159949] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c intel_rapl w83627ehf x86_pkg_temp_thermal intel_powerclamp hwmon_vid coretemp kvm_intel kvm snd_hda_codec_realtek snd_hda_codec_generic lp joydev input_leds ppdev gpio_ich 8250_fintek parport_pc parport nuvoton_cir rc_core mac_hid snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd lpc_ich mei_me soundcore mei shpchp serio_raw btrfs drbg ansi_cprng dm_crypt raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid0 multipath linear raid1 crct10dif_pclmul crc32_pclmul hid_generic i915 aesni_intel ahci aes_x86_64 lrw usbhid video gf128mul i2c_algo_bit glue_helper e1000e ablk_helper drm_kms_helper libahci ptp cryptd hid psmouse pps_core drm pata_acpi [3099966.159978] CPU: 3 PID: 27516 Comm: btrfs Tainted: G U W L 4.2.0-27-generic #32~14.04.1-Ubuntu [3099966.159979] Hardware name: /DQ67OW, BIOS SWQ6710H.86A.0067.2014.0313.1347 03/13/2014 [3099966.159980] task: ffff8800aca0a940 ti: ffff880110c5c000 task.ti: ffff880110c5c000 [3099966.159981] RIP: 0010:[] [] __del_reloc_root+0x28/0x100 [btrfs] [3099966.159992] RSP: 0018:ffff880110c5fa58 EFLAGS: 00000283 [3099966.159993] RAX: ffff88042b530000 RBX: 00000000ffffffe2 RCX: 00000000ffffffe2 [3099966.159994] RDX: 000007ba9c902000 RSI: ffffffffc034e280 RDI: ffff88042b4bd800 [3099966.159994] RBP: ffff880110c5fa78 R08: 0000000000000000 R09: 00000000ffffffe2 [3099966.159995] R10: ffffffffc02a912a R11: ffffea00029bc9c0 R12: 000000002b4bf801 [3099966.159996] R13: ffff88042b4bf800 R14: ffff8800a6f277e0 R15: ffff88042b4bf900 [3099966.159997] FS: 00007f93651f0880(0000) GS:ffff88043e2c0000(0000) knlGS:0000000000000000 [3099966.159998] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [3099966.159999] CR2: 0000559c1ffff7d0 CR3: 00000002fca04000 CR4: 00000000000406e0 [3099966.160000] Stack: [3099966.160000] ffff880110c5fab8 ffff88002a9e8800 ffff88042b52b000 ffff880110c5fab8 [3099966.160002] ffff880110c5fa98 ffffffffc031fa25 ffff88042b4bfbc0 ffff88042b4bfbc0 [3099966.160003] ffff880110c5faf8 ffffffffc0325f2a ffff88002a9e8d78 000000002a9e8d78 [3099966.160004] Call Trace: [3099966.160011] [] free_reloc_roots+0x25/0x40 [btrfs] [3099966.160017] [] merge_reloc_roots+0x16a/0x230 [btrfs] [3099966.160023] [] relocate_block_group+0x256/0x600 [btrfs] [3099966.160029] [] btrfs_relocate_block_group+0x1c3/0x2d0 [btrfs] [3099966.160036] [] btrfs_relocate_chunk.isra.39+0x3e/0xc0 [btrfs] [3099966.160042] [] __btrfs_balance+0x48f/0x8c0 [btrfs] [3099966.160049] [] btrfs_balance+0x37d/0x650 [btrfs] [3099966.160056] [] ? btrfs_ioctl_balance+0x282/0x530 [btrfs] [3099966.160062] [] btrfs_ioctl_balance+0x3f6/0x530 [btrfs] [3099966.160068] [] btrfs_ioctl+0x56f/0x2470 [btrfs] [3099966.160072] [] ? lru_cache_add_active_or_unevictable+0x2b/0xa0 [3099966.160074] [] ? handle_mm_fault+0xba5/0x1840 [3099966.160076] [] do_vfs_ioctl+0x2cd/0x4b0 [3099966.160078] [] ? __do_page_fault+0x1b6/0x430 [3099966.160079] [] SyS_ioctl+0x79/0x90 [3099966.160081] [] entry_SYSCALL_64_fastpath+0x16/0x75 [3099966.160082] Code: 0f 1f 00 66 66 66 66 90 55 48 89 e5 41 56 41 55 41 54 49 89 fc 53 48 8b 87 f0 01 00 00 4c 8b a8 b8 0b 00 00 4d 8d b5 70 05 00 00 <4c> 89 f7 e8 b0 c6 49 c1 49 8b 04 24 49 8b 9d 68 05 00 00 48 8b [3099994.172280] NMI watchdog: BUG: soft lockup - CPU#3 stuck for 22s! [btrfs:27516] [3099994.172922] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c intel_rapl w83627ehf x86_pkg_temp_thermal intel_powerclamp hwmon_vid coretemp kvm_intel kvm snd_hda_codec_realtek snd_hda_codec_generic lp joydev input_leds ppdev gpio_ich 8250_fintek parport_pc parport nuvoton_cir rc_core mac_hid snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd lpc_ich mei_me soundcore mei shpchp serio_raw btrfs drbg ansi_cprng dm_crypt raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid0 multipath linear raid1 crct10dif_pclmul crc32_pclmul hid_generic i915 aesni_intel ahci aes_x86_64 lrw usbhid video gf128mul i2c_algo_bit glue_helper e1000e ablk_helper drm_kms_helper libahci ptp cryptd hid psmouse pps_core drm pata_acpi [3099994.172951] CPU: 3 PID: 27516 Comm: btrfs Tainted: G U W L 4.2.0-27-generic #32~14.04.1-Ubuntu [3099994.172952] Hardware name: /DQ67OW, BIOS SWQ6710H.86A.0067.2014.0313.1347 03/13/2014 [3099994.172953] task: ffff8800aca0a940 ti: ffff880110c5c000 task.ti: ffff880110c5c000 [3099994.172954] RIP: 0010:[] [] _raw_spin_lock+0x10/0x30 [3099994.172957] RSP: 0018:ffff880110c5fa50 EFLAGS: 00000246 [3099994.172958] RAX: 0000000000000000 RBX: 00000000ffffffe2 RCX: 00000000ffffffe2 [3099994.172959] RDX: 0000000000000001 RSI: ffffffffc034e280 RDI: ffff88002a9e8d70 [3099994.172959] RBP: ffff880110c5fa78 R08: 0000000000000000 R09: 00000000ffffffe2 [3099994.172960] R10: ffffffffc02a912a R11: ffffea00029bc9c0 R12: 000000002b4bf801 [3099994.172961] R13: ffff88042b4bf800 R14: ffff8800a6f277e0 R15: ffff88042b4bf900 [3099994.172962] FS: 00007f93651f0880(0000) GS:ffff88043e2c0000(0000) knlGS:0000000000000000 [3099994.172963] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [3099994.172964] CR2: 0000559c1ffff7d0 CR3: 00000002fca04000 CR4: 00000000000406e0 [3099994.172964] Stack: [3099994.172965] ffffffffc031f930 ffff880110c5fab8 ffff88002a9e8800 ffff88042b52b000 [3099994.172966] ffff880110c5fab8 ffff880110c5fa98 ffffffffc031fa25 ffff88042b4bfbc0 [3099994.172968] ffff88042b4bfbc0 ffff880110c5faf8 ffffffffc0325f2a ffff88002a9e8d78 [3099994.172969] Call Trace: [3099994.172981] [] ? __del_reloc_root+0x30/0x100 [btrfs] [3099994.172987] [] free_reloc_roots+0x25/0x40 [btrfs] [3099994.172993] [] merge_reloc_roots+0x16a/0x230 [btrfs] [3099994.173000] [] relocate_block_group+0x256/0x600 [btrfs] [3099994.173006] [] btrfs_relocate_block_group+0x1c3/0x2d0 [btrfs] [3099994.173013] [] btrfs_relocate_chunk.isra.39+0x3e/0xc0 [btrfs] [3099994.173019] [] __btrfs_balance+0x48f/0x8c0 [btrfs] [3099994.173025] [] btrfs_balance+0x37d/0x650 [btrfs] [3099994.173032] [] ? btrfs_ioctl_balance+0x282/0x530 [btrfs] [3099994.173038] [] btrfs_ioctl_balance+0x3f6/0x530 [btrfs] [3099994.173044] [] btrfs_ioctl+0x56f/0x2470 [btrfs] [3099994.173047] [] ? lru_cache_add_active_or_unevictable+0x2b/0xa0 [3099994.173048] [] ? handle_mm_fault+0xba5/0x1840 [3099994.173051] [] do_vfs_ioctl+0x2cd/0x4b0 [3099994.173053] [] ? __do_page_fault+0x1b6/0x430 [3099994.173054] [] SyS_ioctl+0x79/0x90 [3099994.173055] [] entry_SYSCALL_64_fastpath+0x16/0x75 [3099994.173056] Code: 00 00 00 f0 0f b1 17 85 c0 75 ef b0 01 5d c3 66 66 66 2e 0f 1f 84 00 00 00 00 00 66 66 66 66 90 31 c0 ba 01 00 00 00 f0 0f b1 17 <85> c0 75 01 c3 55 89 c6 48 89 e5 e8 cf 29 ff ff 5d c3 66 66 66 [3100022.185274] NMI watchdog: BUG: soft lockup - CPU#3 stuck for 22s! [btrfs:27516] [3100022.185919] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c intel_rapl w83627ehf x86_pkg_temp_thermal intel_powerclamp hwmon_vid coretemp kvm_intel kvm snd_hda_codec_realtek snd_hda_codec_generic lp joydev input_leds ppdev gpio_ich 8250_fintek parport_pc parport nuvoton_cir rc_core mac_hid snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd lpc_ich mei_me soundcore mei shpchp serio_raw btrfs drbg ansi_cprng dm_crypt raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid0 multipath linear raid1 crct10dif_pclmul crc32_pclmul hid_generic i915 aesni_intel ahci aes_x86_64 lrw usbhid video gf128mul i2c_algo_bit glue_helper e1000e ablk_helper drm_kms_helper libahci ptp cryptd hid psmouse pps_core drm pata_acpi [3100022.185952] CPU: 3 PID: 27516 Comm: btrfs Tainted: G U W L 4.2.0-27-generic #32~14.04.1-Ubuntu [3100022.185952] Hardware name: /DQ67OW, BIOS SWQ6710H.86A.0067.2014.0313.1347 03/13/2014 [3100022.185954] task: ffff8800aca0a940 ti: ffff880110c5c000 task.ti: ffff880110c5c000 [3100022.185954] RIP: 0010:[] [] _raw_spin_lock+0x10/0x30 [3100022.185958] RSP: 0018:ffff880110c5fa50 EFLAGS: 00000246 [3100022.185959] RAX: 0000000000000000 RBX: 00000000ffffffe2 RCX: 00000000ffffffe2 [3100022.185960] RDX: 0000000000000001 RSI: ffffffffc034e280 RDI: ffff88002a9e8d70 [3100022.185961] RBP: ffff880110c5fa78 R08: 0000000000000000 R09: 00000000ffffffe2 [3100022.185961] R10: ffffffffc02a912a R11: ffffea00029bc9c0 R12: 000000002b4bf801 [3100022.185962] R13: ffff88042b4bf800 R14: ffff8800a6f277e0 R15: ffff88042b4bf900 [3100022.185963] FS: 00007f93651f0880(0000) GS:ffff88043e2c0000(0000) knlGS:0000000000000000 [3100022.185964] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [3100022.185965] CR2: 0000559c1ffff7d0 CR3: 00000002fca04000 CR4: 00000000000406e0 [3100022.185966] Stack: [3100022.185966] ffffffffc031f930 ffff880110c5fab8 ffff88002a9e8800 ffff88042b52b000 [3100022.185968] ffff880110c5fab8 ffff880110c5fa98 ffffffffc031fa25 ffff88042b4bfbc0 [3100022.185969] ffff88042b4bfbc0 ffff880110c5faf8 ffffffffc0325f2a ffff88002a9e8d78 [3100022.185970] Call Trace: [3100022.185983] [] ? __del_reloc_root+0x30/0x100 [btrfs] [3100022.185990] [] free_reloc_roots+0x25/0x40 [btrfs] [3100022.185996] [] merge_reloc_roots+0x16a/0x230 [btrfs] [3100022.186002] [] relocate_block_group+0x256/0x600 [btrfs] [3100022.186008] [] btrfs_relocate_block_group+0x1c3/0x2d0 [btrfs] [3100022.186015] [] btrfs_relocate_chunk.isra.39+0x3e/0xc0 [btrfs] [3100022.186022] [] __btrfs_balance+0x48f/0x8c0 [btrfs] [3100022.186028] [] btrfs_balance+0x37d/0x650 [btrfs] [3100022.186035] [] ? btrfs_ioctl_balance+0x282/0x530 [btrfs] [3100022.186041] [] btrfs_ioctl_balance+0x3f6/0x530 [btrfs] [3100022.186047] [] btrfs_ioctl+0x56f/0x2470 [btrfs] [3100022.186050] [] ? lru_cache_add_active_or_unevictable+0x2b/0xa0 [3100022.186052] [] ? handle_mm_fault+0xba5/0x1840 [3100022.186055] [] do_vfs_ioctl+0x2cd/0x4b0 [3100022.186057] [] ? __do_page_fault+0x1b6/0x430 [3100022.186058] [] SyS_ioctl+0x79/0x90 [3100022.186060] [] entry_SYSCALL_64_fastpath+0x16/0x75 [3100022.186061] Code: 00 00 00 f0 0f b1 17 85 c0 75 ef b0 01 5d c3 66 66 66 2e 0f 1f 84 00 00 00 00 00 66 66 66 66 90 31 c0 ba 01 00 00 00 f0 0f b1 17 <85> c0 75 01 c3 55 89 c6 48 89 e5 e8 cf 29 ff ff 5d c3 66 66 66 [3100035.943655] INFO: rcu_sched self-detected stall on CPU { 3} (t=17701179 jiffies g=20208670 c=20208669 q=0) [3100035.944332] Task dump for CPU 3: [3100035.944333] btrfs R running task 0 27516 25625 0x0000000c [3100035.944335] ffffffff81c52c40 ffff88043e2c3d88 ffffffff810a303f 0000000000000003 [3100035.944336] ffffffff81c52c40 ffff88043e2c3da8 ffffffff810a579d 0000000000000083 [3100035.944338] 0000000000000004 ffff88043e2c3dd8 ffffffff810d7724 ffff88043e2d74c0 [3100035.944339] Call Trace: [3100035.944340] [] sched_show_task+0xaf/0x110 [3100035.944345] [] dump_cpu_task+0x3d/0x50 [3100035.944348] [] rcu_dump_cpu_stacks+0x84/0xc0 [3100035.944350] [] rcu_check_callbacks+0x44a/0x720 [3100035.944351] [] ? account_process_tick+0x61/0x170 [3100035.944354] [] ? tick_sched_do_timer+0x30/0x30 [3100035.944355] [] update_process_times+0x39/0x60 [3100035.944357] [] tick_sched_handle.isra.15+0x25/0x60 [3100035.944358] [] tick_sched_timer+0x44/0x80 [3100035.944360] [] __hrtimer_run_queues+0xe4/0x200 [3100035.944361] [] hrtimer_interrupt+0xa8/0x1a0 [3100035.944363] [] local_apic_timer_interrupt+0x39/0x60 [3100035.944365] [] smp_apic_timer_interrupt+0x45/0x60 [3100035.944367] [] apic_timer_interrupt+0x6b/0x70 [3100035.944368] [] ? btrfs_free_path+0x2a/0x40 [btrfs] [3100035.944376] [] ? _raw_spin_lock+0x10/0x30 [3100035.944383] [] ? __del_reloc_root+0x30/0x100 [btrfs] [3100035.944390] [] free_reloc_roots+0x25/0x40 [btrfs] [3100035.944395] [] merge_reloc_roots+0x16a/0x230 [btrfs] [3100035.944401] [] relocate_block_group+0x256/0x600 [btrfs] [3100035.944407] [] btrfs_relocate_block_group+0x1c3/0x2d0 [btrfs] [3100035.944414] [] btrfs_relocate_chunk.isra.39+0x3e/0xc0 [btrfs] [3100035.944420] [] __btrfs_balance+0x48f/0x8c0 [btrfs] [3100035.944427] [] btrfs_balance+0x37d/0x650 [btrfs] [3100035.944434] [] ? btrfs_ioctl_balance+0x282/0x530 [btrfs] [3100035.944440] [] btrfs_ioctl_balance+0x3f6/0x530 [btrfs] [3100035.944446] [] btrfs_ioctl+0x56f/0x2470 [btrfs] [3100035.944448] [] ? lru_cache_add_active_or_unevictable+0x2b/0xa0 [3100035.944450] [] ? handle_mm_fault+0xba5/0x1840 [3100035.944452] [] do_vfs_ioctl+0x2cd/0x4b0 [3100035.944454] [] ? __do_page_fault+0x1b6/0x430 [3100035.944455] [] SyS_ioctl+0x79/0x90 [3100035.944457] [] entry_SYSCALL_64_fastpath+0x16/0x75 [3100062.203836] NMI watchdog: BUG: soft lockup - CPU#3 stuck for 22s! [btrfs:27516] [3100062.204519] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c intel_rapl w83627ehf x86_pkg_temp_thermal intel_powerclamp hwmon_vid coretemp kvm_intel kvm snd_hda_codec_realtek snd_hda_codec_generic lp joydev input_leds ppdev gpio_ich 8250_fintek parport_pc parport nuvoton_cir rc_core mac_hid snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd lpc_ich mei_me soundcore mei shpchp serio_raw btrfs drbg ansi_cprng dm_crypt raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid0 multipath linear raid1 crct10dif_pclmul crc32_pclmul hid_generic i915 aesni_intel ahci aes_x86_64 lrw usbhid video gf128mul i2c_algo_bit glue_helper e1000e ablk_helper drm_kms_helper libahci ptp cryptd hid psmouse pps_core drm pata_acpi [3100062.204552] CPU: 3 PID: 27516 Comm: btrfs Tainted: G U W L 4.2.0-27-generic #32~14.04.1-Ubuntu [3100062.204553] Hardware name: /DQ67OW, BIOS SWQ6710H.86A.0067.2014.0313.1347 03/13/2014 [3100062.204554] task: ffff8800aca0a940 ti: ffff880110c5c000 task.ti: ffff880110c5c000 [3100062.204555] RIP: 0010:[] [] _raw_spin_lock+0x10/0x30 [3100062.204559] RSP: 0018:ffff880110c5fa50 EFLAGS: 00000246 [3100062.204560] RAX: 0000000000000000 RBX: 00000000ffffffe2 RCX: 00000000ffffffe2 [3100062.204561] RDX: 0000000000000001 RSI: ffffffffc034e280 RDI: ffff88002a9e8d70 [3100062.204561] RBP: ffff880110c5fa78 R08: 0000000000000000 R09: 00000000ffffffe2 [3100062.204562] R10: ffffffffc02a912a R11: ffffea00029bc9c0 R12: 000000002b4bf801 [3100062.204563] R13: ffff88042b4bf800 R14: ffff8800a6f277e0 R15: ffff88042b4bf900 [3100062.204564] FS: 00007f93651f0880(0000) GS:ffff88043e2c0000(0000) knlGS:0000000000000000 [3100062.204565] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [3100062.204566] CR2: 0000559c1ffff7d0 CR3: 00000002fca04000 CR4: 00000000000406e0 [3100062.204566] Stack: [3100062.204567] ffffffffc031f930 ffff880110c5fab8 ffff88002a9e8800 ffff88042b52b000 [3100062.204569] ffff880110c5fab8 ffff880110c5fa98 ffffffffc031fa25 ffff88042b4bfbc0 [3100062.204570] ffff88042b4bfbc0 ffff880110c5faf8 ffffffffc0325f2a ffff88002a9e8d78 [3100062.204571] Call Trace: [3100062.204584] [] ? __del_reloc_root+0x30/0x100 [btrfs] [3100062.204591] [] free_reloc_roots+0x25/0x40 [btrfs] [3100062.204597] [] merge_reloc_roots+0x16a/0x230 [btrfs] [3100062.204603] [] relocate_block_group+0x256/0x600 [btrfs] [3100062.204609] [] btrfs_relocate_block_group+0x1c3/0x2d0 [btrfs] [3100062.204616] [] btrfs_relocate_chunk.isra.39+0x3e/0xc0 [btrfs] [3100062.204622] [] __btrfs_balance+0x48f/0x8c0 [btrfs] [3100062.204629] [] btrfs_balance+0x37d/0x650 [btrfs] [3100062.204636] [] ? btrfs_ioctl_balance+0x282/0x530 [btrfs] [3100062.204642] [] btrfs_ioctl_balance+0x3f6/0x530 [btrfs] [3100062.204648] [] btrfs_ioctl+0x56f/0x2470 [btrfs] [3100062.204651] [] ? lru_cache_add_active_or_unevictable+0x2b/0xa0 [3100062.204653] [] ? handle_mm_fault+0xba5/0x1840 [3100062.204655] [] do_vfs_ioctl+0x2cd/0x4b0 [3100062.204657] [] ? __do_page_fault+0x1b6/0x430 [3100062.204659] [] SyS_ioctl+0x79/0x90 [3100062.204660] [] entry_SYSCALL_64_fastpath+0x16/0x75 [3100062.204661] Code: 00 00 00 f0 0f b1 17 85 c0 75 ef b0 01 5d c3 66 66 66 2e 0f 1f 84 00 00 00 00 00 66 66 66 66 90 31 c0 ba 01 00 00 00 f0 0f b1 17 <85> c0 75 01 c3 55 89 c6 48 89 e5 e8 cf 29 ff ff 5d c3 66 66 66 [3100090.216829] NMI watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [btrfs:27516] [3100090.217509] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c intel_rapl w83627ehf x86_pkg_temp_thermal intel_powerclamp hwmon_vid coretemp kvm_intel kvm snd_hda_codec_realtek snd_hda_codec_generic lp joydev input_leds ppdev gpio_ich 8250_fintek parport_pc parport nuvoton_cir rc_core mac_hid snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd lpc_ich mei_me soundcore mei shpchp serio_raw btrfs drbg ansi_cprng dm_crypt raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid0 multipath linear raid1 crct10dif_pclmul crc32_pclmul hid_generic i915 aesni_intel ahci aes_x86_64 lrw usbhid video gf128mul i2c_algo_bit glue_helper e1000e ablk_helper drm_kms_helper libahci ptp cryptd hid psmouse pps_core drm pata_acpi [3100090.217537] CPU: 3 PID: 27516 Comm: btrfs Tainted: G U W L 4.2.0-27-generic #32~14.04.1-Ubuntu [3100090.217538] Hardware name: /DQ67OW, BIOS SWQ6710H.86A.0067.2014.0313.1347 03/13/2014 [3100090.217539] task: ffff8800aca0a940 ti: ffff880110c5c000 task.ti: ffff880110c5c000 [3100090.217540] RIP: 0010:[] [] __del_reloc_root+0xd1/0x100 [btrfs] [3100090.217551] RSP: 0018:ffff880110c5fa60 EFLAGS: 00000246 [3100090.217552] RAX: ffff880142cd36f8 RBX: ffffffffc02a912a RCX: 00000000ffffffe2 [3100090.217553] RDX: 000007ba9c902000 RSI: ffffffffc034e280 RDI: ffff88002a9e8d70 [3100090.217553] RBP: ffff880110c5fa78 R08: 0000000000000000 R09: 00000000ffffffe2 [3100090.217554] R10: ffffffffc02a912a R11: ffffea00029bc9c0 R12: 00000000ffffffe2 [3100090.217555] R13: ffff880110c5fa78 R14: 000000002b4bf801 R15: ffff88042b4bf800 [3100090.217556] FS: 00007f93651f0880(0000) GS:ffff88043e2c0000(0000) knlGS:0000000000000000 [3100090.217557] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [3100090.217558] CR2: 0000559c1ffff7d0 CR3: 00000002fca04000 CR4: 00000000000406e0 [3100090.217558] Stack: [3100090.217559] ffff88002a9e8800 ffff88042b52b000 ffff880110c5fab8 ffff880110c5fa98 [3100090.217560] ffffffffc031fa25 ffff88042b4bfbc0 ffff88042b4bfbc0 ffff880110c5faf8 [3100090.217562] ffffffffc0325f2a ffff88002a9e8d78 000000002a9e8d78 ffff88042b4bdbc0 [3100090.217563] Call Trace: [3100090.217570] [] free_reloc_roots+0x25/0x40 [btrfs] [3100090.217576] [] merge_reloc_roots+0x16a/0x230 [btrfs] [3100090.217582] [] relocate_block_group+0x256/0x600 [btrfs] [3100090.217588] [] btrfs_relocate_block_group+0x1c3/0x2d0 [btrfs] [3100090.217594] [] btrfs_relocate_chunk.isra.39+0x3e/0xc0 [btrfs] [3100090.217601] [] __btrfs_balance+0x48f/0x8c0 [btrfs] [3100090.217607] [] btrfs_balance+0x37d/0x650 [btrfs] [3100090.217614] [] ? btrfs_ioctl_balance+0x282/0x530 [btrfs] [3100090.217620] [] btrfs_ioctl_balance+0x3f6/0x530 [btrfs] [3100090.217626] [] btrfs_ioctl+0x56f/0x2470 [btrfs] [3100090.217630] [] ? lru_cache_add_active_or_unevictable+0x2b/0xa0 [3100090.217632] [] ? handle_mm_fault+0xba5/0x1840 [3100090.217634] [] do_vfs_ioctl+0x2cd/0x4b0 [3100090.217637] [] ? __do_page_fault+0x1b6/0x430 [3100090.217638] [] SyS_ioctl+0x79/0x90 [3100090.217640] [] entry_SYSCALL_64_fastpath+0x16/0x75 [3100090.217641] Code: f0 01 00 00 49 89 84 24 c0 03 00 00 49 89 84 24 c8 03 00 00 48 81 c7 38 09 00 00 c6 07 00 66 66 66 90 48 89 df e8 b0 d3 ea c0 5b <41> 5c 41 5d 41 5e 5d c3 76 09 48 8b 5b 08 e9 5a ff ff ff 49 8d [3100118.229822] NMI watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [btrfs:27516] [3100118.230508] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c intel_rapl w83627ehf x86_pkg_temp_thermal intel_powerclamp hwmon_vid coretemp kvm_intel kvm snd_hda_codec_realtek snd_hda_codec_generic lp joydev input_leds ppdev gpio_ich 8250_fintek parport_pc parport nuvoton_cir rc_core mac_hid snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd lpc_ich mei_me soundcore mei shpchp serio_raw btrfs drbg ansi_cprng dm_crypt raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid0 multipath linear raid1 crct10dif_pclmul crc32_pclmul hid_generic i915 aesni_intel ahci aes_x86_64 lrw usbhid video gf128mul i2c_algo_bit glue_helper e1000e ablk_helper drm_kms_helper libahci ptp cryptd hid psmouse pps_core drm pata_acpi [3100118.230541] CPU: 3 PID: 27516 Comm: btrfs Tainted: G U W L 4.2.0-27-generic #32~14.04.1-Ubuntu [3100118.230542] Hardware name: /DQ67OW, BIOS SWQ6710H.86A.0067.2014.0313.1347 03/13/2014 [3100118.230544] task: ffff8800aca0a940 ti: ffff880110c5c000 task.ti: ffff880110c5c000 [3100118.230544] RIP: 0010:[] [] _raw_spin_lock+0x10/0x30 [3100118.230549] RSP: 0018:ffff880110c5fa50 EFLAGS: 00000246 [3100118.230550] RAX: 0000000000000000 RBX: 00000000ffffffe2 RCX: 00000000ffffffe2 [3100118.230551] RDX: 0000000000000001 RSI: ffffffffc034e280 RDI: ffff88002a9e8d70 [3100118.230552] RBP: ffff880110c5fa78 R08: 0000000000000000 R09: 00000000ffffffe2 [3100118.230552] R10: ffffffffc02a912a R11: ffffea00029bc9c0 R12: 000000002b4bf801 [3100118.230553] R13: ffff88042b4bf800 R14: ffff8800a6f277e0 R15: ffff88042b4bf900 [3100118.230554] FS: 00007f93651f0880(0000) GS:ffff88043e2c0000(0000) knlGS:0000000000000000 [3100118.230555] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [3100118.230556] CR2: 0000559c1ffff7d0 CR3: 00000002fca04000 CR4: 00000000000406e0 [3100118.230557] Stack: [3100118.230557] ffffffffc031f930 ffff880110c5fab8 ffff88002a9e8800 ffff88042b52b000 [3100118.230559] ffff880110c5fab8 ffff880110c5fa98 ffffffffc031fa25 ffff88042b4bfbc0 [3100118.230560] ffff88042b4bfbc0 ffff880110c5faf8 ffffffffc0325f2a ffff88002a9e8d78 [3100118.230561] Call Trace: [3100118.230574] [] ? __del_reloc_root+0x30/0x100 [btrfs] [3100118.230581] [] free_reloc_roots+0x25/0x40 [btrfs] [3100118.230587] [] merge_reloc_roots+0x16a/0x230 [btrfs] [3100118.230593] [] relocate_block_group+0x256/0x600 [btrfs] [3100118.230599] [] btrfs_relocate_block_group+0x1c3/0x2d0 [btrfs] [3100118.230605] [] btrfs_relocate_chunk.isra.39+0x3e/0xc0 [btrfs] [3100118.230612] [] __btrfs_balance+0x48f/0x8c0 [btrfs] [3100118.230618] [] btrfs_balance+0x37d/0x650 [btrfs] [3100118.230625] [] ? btrfs_ioctl_balance+0x282/0x530 [btrfs] [3100118.230631] [] btrfs_ioctl_balance+0x3f6/0x530 [btrfs] [3100118.230637] [] btrfs_ioctl+0x56f/0x2470 [btrfs] [3100118.230640] [] ? lru_cache_add_active_or_unevictable+0x2b/0xa0 [3100118.230642] [] ? handle_mm_fault+0xba5/0x1840 [3100118.230644] [] do_vfs_ioctl+0x2cd/0x4b0 [3100118.230647] [] ? __do_page_fault+0x1b6/0x430 [3100118.230648] [] SyS_ioctl+0x79/0x90 [3100118.230649] [] entry_SYSCALL_64_fastpath+0x16/0x75 [3100118.230650] Code: 00 00 00 f0 0f b1 17 85 c0 75 ef b0 01 5d c3 66 66 66 2e 0f 1f 84 00 00 00 00 00 66 66 66 66 90 31 c0 ba 01 00 00 00 f0 0f b1 17 <85> c0 75 01 c3 55 89 c6 48 89 e5 e8 cf 29 ff ff 5d c3 66 66 66 [3100146.242815] NMI watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [btrfs:27516] [3100146.243477] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c intel_rapl w83627ehf x86_pkg_temp_thermal intel_powerclamp hwmon_vid coretemp kvm_intel kvm snd_hda_codec_realtek snd_hda_codec_generic lp joydev input_leds ppdev gpio_ich 8250_fintek parport_pc parport nuvoton_cir rc_core mac_hid snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd lpc_ich mei_me soundcore mei shpchp serio_raw btrfs drbg ansi_cprng dm_crypt raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid0 multipath linear raid1 crct10dif_pclmul crc32_pclmul hid_generic i915 aesni_intel ahci aes_x86_64 lrw usbhid video gf128mul i2c_algo_bit glue_helper e1000e ablk_helper drm_kms_helper libahci ptp cryptd hid psmouse pps_core drm pata_acpi [3100146.243507] CPU: 3 PID: 27516 Comm: btrfs Tainted: G U W L 4.2.0-27-generic #32~14.04.1-Ubuntu [3100146.243508] Hardware name: /DQ67OW, BIOS SWQ6710H.86A.0067.2014.0313.1347 03/13/2014 [3100146.243509] task: ffff8800aca0a940 ti: ffff880110c5c000 task.ti: ffff880110c5c000 [3100146.243510] RIP: 0010:[] [] __del_reloc_root+0x9/0x100 [btrfs] [3100146.243522] RSP: 0018:ffff880110c5fa78 EFLAGS: 00000283 [3100146.243522] RAX: ffff88042b4bdbc0 RBX: 0000000000000000 RCX: 00000000ffffffe2 [3100146.243523] RDX: 000007ba9c902000 RSI: ffffffffc034e280 RDI: ffff88042b4bd800 [3100146.243524] RBP: ffff880110c5fa78 R08: 0000000000000000 R09: 00000000ffffffe2 [3100146.243525] R10: ffffffffc02a912a R11: ffffea00029bc9c0 R12: ffffffffc02a912a [3100146.243526] R13: ffffea00029bc9c0 R14: 00000000ffffffe2 R15: ffff880110c5fa78 [3100146.243527] FS: 00007f93651f0880(0000) GS:ffff88043e2c0000(0000) knlGS:0000000000000000 [3100146.243528] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [3100146.243529] CR2: 0000559c1ffff7d0 CR3: 00000002fca04000 CR4: 00000000000406e0 [3100146.243529] Stack: [3100146.243530] ffff880110c5fa98 ffffffffc031fa25 ffff88042b4bfbc0 ffff88042b4bfbc0 [3100146.243531] ffff880110c5faf8 ffffffffc0325f2a ffff88002a9e8d78 000000002a9e8d78 [3100146.243533] ffff88042b4bdbc0 ffff88042b4bfbc0 ffff8804248c21b0 ffff88002a9e8908 [3100146.243534] Call Trace: [3100146.243541] [] free_reloc_roots+0x25/0x40 [btrfs] [3100146.243547] [] merge_reloc_roots+0x16a/0x230 [btrfs] [3100146.243552] [] relocate_block_group+0x256/0x600 [btrfs] [3100146.243558] [] btrfs_relocate_block_group+0x1c3/0x2d0 [btrfs] [3100146.243565] [] btrfs_relocate_chunk.isra.39+0x3e/0xc0 [btrfs] [3100146.243571] [] __btrfs_balance+0x48f/0x8c0 [btrfs] [3100146.243578] [] btrfs_balance+0x37d/0x650 [btrfs] [3100146.243585] [] ? btrfs_ioctl_balance+0x282/0x530 [btrfs] [3100146.243591] [] btrfs_ioctl_balance+0x3f6/0x530 [btrfs] [3100146.243597] [] btrfs_ioctl+0x56f/0x2470 [btrfs] [3100146.243600] [] ? lru_cache_add_active_or_unevictable+0x2b/0xa0 [3100146.243602] [] ? handle_mm_fault+0xba5/0x1840 [3100146.243604] [] do_vfs_ioctl+0x2cd/0x4b0 [3100146.243606] [] ? __do_page_fault+0x1b6/0x430 [3100146.243607] [] SyS_ioctl+0x79/0x90 [3100146.243609] [] entry_SYSCALL_64_fastpath+0x16/0x75 [3100146.243610] Code: c0 10 54 35 c0 b9 ef ff ff ff ba 0f 05 00 00 48 c7 c6 c0 e2 34 c0 31 c0 e8 5d 96 02 00 0f 0b 0f 1f 00 66 66 66 66 90 55 48 89 e5 <41> 56 41 55 41 54 49 89 fc 53 48 8b 87 f0 01 00 00 4c 8b a8 b8 [3100174.255808] NMI watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [btrfs:27516] [3100174.256455] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c intel_rapl w83627ehf x86_pkg_temp_thermal intel_powerclamp hwmon_vid coretemp kvm_intel kvm snd_hda_codec_realtek snd_hda_codec_generic lp joydev input_leds ppdev gpio_ich 8250_fintek parport_pc parport nuvoton_cir rc_core mac_hid snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd lpc_ich mei_me soundcore mei shpchp serio_raw btrfs drbg ansi_cprng dm_crypt raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid0 multipath linear raid1 crct10dif_pclmul crc32_pclmul hid_generic i915 aesni_intel ahci aes_x86_64 lrw usbhid video gf128mul i2c_algo_bit glue_helper e1000e ablk_helper drm_kms_helper libahci ptp cryptd hid psmouse pps_core drm pata_acpi [3100174.256486] CPU: 3 PID: 27516 Comm: btrfs Tainted: G U W L 4.2.0-27-generic #32~14.04.1-Ubuntu [3100174.256486] Hardware name: /DQ67OW, BIOS SWQ6710H.86A.0067.2014.0313.1347 03/13/2014 [3100174.256487] task: ffff8800aca0a940 ti: ffff880110c5c000 task.ti: ffff880110c5c000 [3100174.256488] RIP: 0010:[] [] _raw_spin_lock+0x10/0x30 [3100174.256492] RSP: 0018:ffff880110c5fa50 EFLAGS: 00000246 [3100174.256493] RAX: 0000000000000000 RBX: 00000000ffffffe2 RCX: 00000000ffffffe2 [3100174.256493] RDX: 0000000000000001 RSI: ffffffffc034e280 RDI: ffff88002a9e8d70 [3100174.256494] RBP: ffff880110c5fa78 R08: 0000000000000000 R09: 00000000ffffffe2 [3100174.256495] R10: ffffffffc02a912a R11: ffffea00029bc9c0 R12: 000000002b4bf801 [3100174.256496] R13: ffff88042b4bf800 R14: ffff8800a6f277e0 R15: ffff88042b4bf900 [3100174.256497] FS: 00007f93651f0880(0000) GS:ffff88043e2c0000(0000) knlGS:0000000000000000 [3100174.256498] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [3100174.256499] CR2: 0000559c1ffff7d0 CR3: 00000002fca04000 CR4: 00000000000406e0 [3100174.256499] Stack: [3100174.256500] ffffffffc031f930 ffff880110c5fab8 ffff88002a9e8800 ffff88042b52b000 [3100174.256501] ffff880110c5fab8 ffff880110c5fa98 ffffffffc031fa25 ffff88042b4bfbc0 [3100174.256502] ffff88042b4bfbc0 ffff880110c5faf8 ffffffffc0325f2a ffff88002a9e8d78 [3100174.256504] Call Trace: [3100174.256516] [] ? __del_reloc_root+0x30/0x100 [btrfs] [3100174.256522] [] free_reloc_roots+0x25/0x40 [btrfs] [3100174.256528] [] merge_reloc_roots+0x16a/0x230 [btrfs] [3100174.256534] [] relocate_block_group+0x256/0x600 [btrfs] [3100174.256540] [] btrfs_relocate_block_group+0x1c3/0x2d0 [btrfs] [3100174.256547] [] btrfs_relocate_chunk.isra.39+0x3e/0xc0 [btrfs] [3100174.256553] [] __btrfs_balance+0x48f/0x8c0 [btrfs] [3100174.256560] [] btrfs_balance+0x37d/0x650 [btrfs] [3100174.256566] [] ? btrfs_ioctl_balance+0x282/0x530 [btrfs] [3100174.256572] [] btrfs_ioctl_balance+0x3f6/0x530 [btrfs] [3100174.256579] [] btrfs_ioctl+0x56f/0x2470 [btrfs] [3100174.256581] [] ? lru_cache_add_active_or_unevictable+0x2b/0xa0 [3100174.256583] [] ? handle_mm_fault+0xba5/0x1840 [3100174.256585] [] do_vfs_ioctl+0x2cd/0x4b0 [3100174.256587] [] ? __do_page_fault+0x1b6/0x430 [3100174.256589] [] SyS_ioctl+0x79/0x90 [3100174.256590] [] entry_SYSCALL_64_fastpath+0x16/0x75 [3100174.256591] Code: 00 00 00 f0 0f b1 17 85 c0 75 ef b0 01 5d c3 66 66 66 2e 0f 1f 84 00 00 00 00 00 66 66 66 66 90 31 c0 ba 01 00 00 00 f0 0f b1 17 <85> c0 75 01 c3 55 89 c6 48 89 e5 e8 cf 29 ff ff 5d c3 66 66 66 [3100202.268801] NMI watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [btrfs:27516] [3100202.269447] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c intel_rapl w83627ehf x86_pkg_temp_thermal intel_powerclamp hwmon_vid coretemp kvm_intel kvm snd_hda_codec_realtek snd_hda_codec_generic lp joydev input_leds ppdev gpio_ich 8250_fintek parport_pc parport nuvoton_cir rc_core mac_hid snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd lpc_ich mei_me soundcore mei shpchp serio_raw btrfs drbg ansi_cprng dm_crypt raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid0 multipath linear raid1 crct10dif_pclmul crc32_pclmul hid_generic i915 aesni_intel ahci aes_x86_64 lrw usbhid video gf128mul i2c_algo_bit glue_helper e1000e ablk_helper drm_kms_helper libahci ptp cryptd hid psmouse pps_core drm pata_acpi [3100202.269480] CPU: 3 PID: 27516 Comm: btrfs Tainted: G U W L 4.2.0-27-generic #32~14.04.1-Ubuntu [3100202.269481] Hardware name: /DQ67OW, BIOS SWQ6710H.86A.0067.2014.0313.1347 03/13/2014 [3100202.269482] task: ffff8800aca0a940 ti: ffff880110c5c000 task.ti: ffff880110c5c000 [3100202.269483] RIP: 0010:[] [] __del_reloc_root+0x59/0x100 [btrfs] [3100202.269496] RSP: 0018:ffff880110c5fa58 EFLAGS: 00000246 [3100202.269497] RAX: ffff880142cd36f8 RBX: 00000000ffffffe2 RCX: 00000000ffffffe2 [3100202.269498] RDX: 000007ba9c902000 RSI: ffffffffc034e280 RDI: ffff88002a9e8d70 [3100202.269498] RBP: ffff880110c5fa78 R08: 0000000000000000 R09: 00000000ffffffe2 [3100202.269499] R10: ffffffffc02a912a R11: ffffea00029bc9c0 R12: 000000002b4bf801 [3100202.269500] R13: ffff88042b4bf800 R14: ffff8800a6f277e0 R15: ffff88042b4bf900 [3100202.269501] FS: 00007f93651f0880(0000) GS:ffff88043e2c0000(0000) knlGS:0000000000000000 [3100202.269502] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [3100202.269503] CR2: 0000559c1ffff7d0 CR3: 00000002fca04000 CR4: 00000000000406e0 [3100202.269503] Stack: [3100202.269504] ffff880110c5fab8 ffff88002a9e8800 ffff88042b52b000 ffff880110c5fab8 [3100202.269505] ffff880110c5fa98 ffffffffc031fa25 ffff88042b4bfbc0 ffff88042b4bfbc0 [3100202.269507] ffff880110c5faf8 ffffffffc0325f2a ffff88002a9e8d78 000000002a9e8d78 [3100202.269508] Call Trace: [3100202.269515] [] free_reloc_roots+0x25/0x40 [btrfs] [3100202.269521] [] merge_reloc_roots+0x16a/0x230 [btrfs] [3100202.269527] [] relocate_block_group+0x256/0x600 [btrfs] [3100202.269533] [] btrfs_relocate_block_group+0x1c3/0x2d0 [btrfs] [3100202.269540] [] btrfs_relocate_chunk.isra.39+0x3e/0xc0 [btrfs] [3100202.269546] [] __btrfs_balance+0x48f/0x8c0 [btrfs] [3100202.269553] [] btrfs_balance+0x37d/0x650 [btrfs] [3100202.269560] [] ? btrfs_ioctl_balance+0x282/0x530 [btrfs] [3100202.269566] [] btrfs_ioctl_balance+0x3f6/0x530 [btrfs] [3100202.269572] [] btrfs_ioctl+0x56f/0x2470 [btrfs] [3100202.269576] [] ? lru_cache_add_active_or_unevictable+0x2b/0xa0 [3100202.269578] [] ? handle_mm_fault+0xba5/0x1840 [3100202.269581] [] do_vfs_ioctl+0x2cd/0x4b0 [3100202.269583] [] ? __do_page_fault+0x1b6/0x430 [3100202.269585] [] SyS_ioctl+0x79/0x90 [3100202.269588] [] entry_SYSCALL_64_fastpath+0x16/0x75 [3100202.269588] Code: 49 c1 49 8b 04 24 49 8b 9d 68 05 00 00 48 8b 10 48 85 db 74 13 48 3b 53 18 0f 83 8c 00 00 00 48 8b 5b 10 48 85 db 75 ed 4c 89 f7 07 00 66 66 66 90 48 85 db 74 6b 4c 3b 63 20 0f 85 89 00 00 [3100216.039188] INFO: rcu_sched self-detected stall on CPU { 3} (t=17746182 jiffies g=20208670 c=20208669 q=0) [3100216.039864] Task dump for CPU 3: [3100216.039865] btrfs R running task 0 27516 25625 0x0000000c [3100216.039867] ffffffff81c52c40 ffff88043e2c3d88 ffffffff810a303f 0000000000000003 [3100216.039868] ffffffff81c52c40 ffff88043e2c3da8 ffffffff810a579d 0000000000000083 [3100216.039870] 0000000000000004 ffff88043e2c3dd8 ffffffff810d7724 ffff88043e2d74c0 [3100216.039871] Call Trace: [3100216.039872] [] sched_show_task+0xaf/0x110 [3100216.039877] [] dump_cpu_task+0x3d/0x50 [3100216.039879] [] rcu_dump_cpu_stacks+0x84/0xc0 [3100216.039881] [] rcu_check_callbacks+0x44a/0x720 [3100216.039883] [] ? account_process_tick+0x61/0x170 [3100216.039885] [] ? tick_sched_do_timer+0x30/0x30 [3100216.039887] [] update_process_times+0x39/0x60 [3100216.039889] [] tick_sched_handle.isra.15+0x25/0x60 [3100216.039890] [] tick_sched_timer+0x44/0x80 [3100216.039892] [] __hrtimer_run_queues+0xe4/0x200 [3100216.039893] [] hrtimer_interrupt+0xa8/0x1a0 [3100216.039895] [] local_apic_timer_interrupt+0x39/0x60 [3100216.039897] [] smp_apic_timer_interrupt+0x45/0x60 [3100216.039899] [] apic_timer_interrupt+0x6b/0x70 [3100216.039899] [] ? btrfs_free_path+0x2a/0x40 [btrfs] [3100216.039908] [] ? _raw_spin_lock+0x10/0x30 [3100216.039916] [] ? __del_reloc_root+0x30/0x100 [btrfs] [3100216.039922] [] free_reloc_roots+0x25/0x40 [btrfs] [3100216.039928] [] merge_reloc_roots+0x16a/0x230 [btrfs] [3100216.039934] [] relocate_block_group+0x256/0x600 [btrfs] [3100216.039939] [] btrfs_relocate_block_group+0x1c3/0x2d0 [btrfs] [3100216.039946] [] btrfs_relocate_chunk.isra.39+0x3e/0xc0 [btrfs] [3100216.039953] [] __btrfs_balance+0x48f/0x8c0 [btrfs] [3100216.039959] [] btrfs_balance+0x37d/0x650 [btrfs] [3100216.039966] [] ? btrfs_ioctl_balance+0x282/0x530 [btrfs] [3100216.039972] [] btrfs_ioctl_balance+0x3f6/0x530 [btrfs] [3100216.039978] [] btrfs_ioctl+0x56f/0x2470 [btrfs] [3100216.039980] [] ? lru_cache_add_active_or_unevictable+0x2b/0xa0 [3100216.039982] [] ? handle_mm_fault+0xba5/0x1840 [3100216.039984] [] do_vfs_ioctl+0x2cd/0x4b0 [3100216.039986] [] ? __do_page_fault+0x1b6/0x430 [3100216.039988] [] SyS_ioctl+0x79/0x90 [3100216.039989] [] entry_SYSCALL_64_fastpath+0x16/0x75 [3100242.287363] NMI watchdog: BUG: soft lockup - CPU#3 stuck for 22s! [btrfs:27516] [3100242.288047] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c intel_rapl w83627ehf x86_pkg_temp_thermal intel_powerclamp hwmon_vid coretemp kvm_intel kvm snd_hda_codec_realtek snd_hda_codec_generic lp joydev input_leds ppdev gpio_ich 8250_fintek parport_pc parport nuvoton_cir rc_core mac_hid snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd lpc_ich mei_me soundcore mei shpchp serio_raw btrfs drbg ansi_cprng dm_crypt raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid0 multipath linear raid1 crct10dif_pclmul crc32_pclmul hid_generic i915 aesni_intel ahci aes_x86_64 lrw usbhid video gf128mul i2c_algo_bit glue_helper e1000e ablk_helper drm_kms_helper libahci ptp cryptd hid psmouse pps_core drm pata_acpi [3100242.288080] CPU: 3 PID: 27516 Comm: btrfs Tainted: G U W L 4.2.0-27-generic #32~14.04.1-Ubuntu [3100242.288081] Hardware name: /DQ67OW, BIOS SWQ6710H.86A.0067.2014.0313.1347 03/13/2014 [3100242.288082] task: ffff8800aca0a940 ti: ffff880110c5c000 task.ti: ffff880110c5c000 [3100242.288083] RIP: 0010:[] [] _raw_spin_lock+0x10/0x30 [3100242.288087] RSP: 0018:ffff880110c5fa50 EFLAGS: 00000246 [3100242.288088] RAX: 0000000000000000 RBX: 00000000ffffffe2 RCX: 00000000ffffffe2 [3100242.288089] RDX: 0000000000000001 RSI: ffffffffc034e280 RDI: ffff88002a9e8d70 [3100242.288090] RBP: ffff880110c5fa78 R08: 0000000000000000 R09: 00000000ffffffe2 [3100242.288091] R10: ffffffffc02a912a R11: ffffea00029bc9c0 R12: 000000002b4bf801 [3100242.288091] R13: ffff88042b4bf800 R14: ffff8800a6f277e0 R15: ffff88042b4bf900 [3100242.288093] FS: 00007f93651f0880(0000) GS:ffff88043e2c0000(0000) knlGS:0000000000000000 [3100242.288093] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [3100242.288094] CR2: 0000559c1ffff7d0 CR3: 00000002fca04000 CR4: 00000000000406e0 [3100242.288095] Stack: [3100242.288096] ffffffffc031f930 ffff880110c5fab8 ffff88002a9e8800 ffff88042b52b000 [3100242.288097] ffff880110c5fab8 ffff880110c5fa98 ffffffffc031fa25 ffff88042b4bfbc0 [3100242.288098] ffff88042b4bfbc0 ffff880110c5faf8 ffffffffc0325f2a ffff88002a9e8d78 [3100242.288100] Call Trace: [3100242.288112] [] ? __del_reloc_root+0x30/0x100 [btrfs] [3100242.288119] [] free_reloc_roots+0x25/0x40 [btrfs] [3100242.288125] [] merge_reloc_roots+0x16a/0x230 [btrfs] [3100242.288130] [] relocate_block_group+0x256/0x600 [btrfs] [3100242.288136] [] btrfs_relocate_block_group+0x1c3/0x2d0 [btrfs] [3100242.288143] [] btrfs_relocate_chunk.isra.39+0x3e/0xc0 [btrfs] [3100242.288150] [] __btrfs_balance+0x48f/0x8c0 [btrfs] [3100242.288156] [] btrfs_balance+0x37d/0x650 [btrfs] [3100242.288163] [