I'm not sure if this is specific to snowball, or even if it is related to bluetooth. I just hit a backtrace that appears to be the same on a pandaboard after transferring a file over USB and letting it sit idle for a few minutes with an open adb shell connection: [ 1178.132659] INFO: rcu_preempt detected stalls on CPUs/tasks: { 0} (detected by 1, t=7682 jiffies) [ 1178.141998] Backtrace for cpu 1 (current): [ 1178.146331] [<c0019fb4>] (unwind_backtrace+0x0/0xf8) from [<c00183bc>] (smp_send_all_cpu_backtrace+0x5c/0xc0) [ 1178.156799] [<c00183bc>] (smp_send_all_cpu_backtrace+0x5c/0xc0) from [<c008a7b4>] (__rcu_pending+0x39c/0x418) [ 1178.167236] [<c008a7b4>] (__rcu_pending+0x39c/0x418) from [<c008b360>] (rcu_check_callbacks+0x194/0x2a4) [ 1178.177215] [<c008b360>] (rcu_check_callbacks+0x194/0x2a4) from [<c0052dc4>] (update_process_times+0x38/0x4c) [ 1178.187683] [<c0052dc4>] (update_process_times+0x38/0x4c) from [<c0071804>] (tick_sched_timer+0x88/0xd8) [ 1178.197662] [<c0071804>] (tick_sched_timer+0x88/0xd8) from [<c0065b14>] (__run_hrtimer+0x7c/0x278) [ 1178.207092] [<c0065b14>] (__run_hrtimer+0x7c/0x278) from [<c0066900>] (hrtimer_interrupt+0x114/0x2a0) [ 1178.216796] [<c0066900>] (hrtimer_interrupt+0x114/0x2a0) from [<c0018c14>] (twd_handler+0x30/0x44) [ 1178.226226] [<c0018c14>] (twd_handler+0x30/0x44) from [<c0086b44>] (handle_percpu_devid_irq+0x90/0x180) [ 1178.236145] [<c0086b44>] (handle_percpu_devid_irq+0x90/0x180) from [<c0083434>] (generic_handle_irq+0x28/0x3c) [ 1178.246673] [<c0083434>] (generic_handle_irq+0x28/0x3c) from [<c0014298>] (handle_IRQ+0x4c/0xb0) [ 1178.255950] [<c0014298>] (handle_IRQ+0x4c/0xb0) from [<c06288f4>] (__irq_svc+0x34/0xac) [ 1178.264343] [<c06288f4>] (__irq_svc+0x34/0xac) from [<c0628484>] (__raw_spin_lock_irqsave+0x88/0xa8) [ 1178.273986] [<c0628484>] (__raw_spin_lock_irqsave+0x88/0xa8) from [<bf0141fc>] (st_unregister+0x38/0x144 [st_drv]) [ 1178.284881] [<bf0141fc>] (st_unregister+0x38/0x144 [st_drv]) from [<bf06b04c>] (ti_st_close+0x3c/0x84 [btwilink]) [ 1178.295806] [<bf06b04c>] (ti_st_close+0x3c/0x84 [btwilink]) from [<bf01f84c>] (hci_dev_do_close+0x104/0x1e4 [bluetooth]) [ 1178.307281] [<bf01f84c>] (hci_dev_do_close+0x104/0x1e4 [bluetooth]) from [<bf0202e8>] (hci_dev_close+0x14/0x68 [bluetooth]) [ 1178.319061] [<bf0202e8>] (hci_dev_close+0x14/0x68 [bluetooth]) from [<bf02bfbc>] (hci_sock_ioctl+0x190/0x3cc [bluetooth]) [ 1178.330596] [<bf02bfbc>] (hci_sock_ioctl+0x190/0x3cc [bluetooth]) from [<c04a8b14>] (sock_ioctl+0x70/0x264) [ 1178.340850] [<c04a8b14>] (sock_ioctl+0x70/0x264) from [<c00e7404>] (do_vfs_ioctl+0x80/0x534) [ 1178.349731] [<c00e7404>] (do_vfs_ioctl+0x80/0x534) from [<c00e7924>] (sys_ioctl+0x6c/0x7c) [ 1178.358428] [<c00e7924>] (sys_ioctl+0x6c/0x7c) from [<c00133a0>] (ret_fast_syscall+0x0/0x30) [ 1178.367309] [ 1178.367309] sending IPI to all other CPUs: [ 1358.382690] INFO: rcu_preempt detected stalls on CPUs/tasks: { 0} (detected by 1, t=30754 jiffies) [ 1358.392120] Backtrace for cpu 1 (current): [ 1358.396453] [<c0019fb4>] (unwind_backtrace+0x0/0xf8) from [<c00183bc>] (smp_send_all_cpu_backtrace+0x5c/0xc0) [ 1358.406890] [<c00183bc>] (smp_send_all_cpu_backtrace+0x5c/0xc0) from [<c008a7b4>] (__rcu_pending+0x39c/0x418) [ 1358.417327] [<c008a7b4>] (__rcu_pending+0x39c/0x418) from [<c008b360>] (rcu_check_callbacks+0x194/0x2a4) [ 1358.427337] [<c008b360>] (rcu_check_callbacks+0x194/0x2a4) from [<c0052dc4>] (update_process_times+0x38/0x4c) [ 1358.437774] [<c0052dc4>] (update_process_times+0x38/0x4c) from [<c0071804>] (tick_sched_timer+0x88/0xd8) [ 1358.447753] [<c0071804>] (tick_sched_timer+0x88/0xd8) from [<c0065b14>] (__run_hrtimer+0x7c/0x278) [ 1358.457214] [<c0065b14>] (__run_hrtimer+0x7c/0x278) from [<c0066900>] (hrtimer_interrupt+0x114/0x2a0) [ 1358.466918] [<c0066900>] (hrtimer_interrupt+0x114/0x2a0) from [<c0018c14>] (twd_handler+0x30/0x44) [ 1358.476348] [<c0018c14>] (twd_handler+0x30/0x44) from [<c0086b44>] (handle_percpu_devid_irq+0x90/0x180) [ 1358.486236] [<c0086b44>] (handle_percpu_devid_irq+0x90/0x180) from [<c0083434>] (generic_handle_irq+0x28/0x3c) [ 1358.496795] [<c0083434>] (generic_handle_irq+0x28/0x3c) from [<c0014298>] (handle_IRQ+0x4c/0xb0) [ 1358.506042] [<c0014298>] (handle_IRQ+0x4c/0xb0) from [<c06288f4>] (__irq_svc+0x34/0xac) [ 1358.514465] [<c06288f4>] (__irq_svc+0x34/0xac) from [<c062847c>] (__raw_spin_lock_irqsave+0x80/0xa8) [ 1358.524108] [<c062847c>] (__raw_spin_lock_irqsave+0x80/0xa8) from [<bf0141fc>] (st_unregister+0x38/0x144 [st_drv]) [ 1358.535003] [<bf0141fc>] (st_unregister+0x38/0x144 [st_drv]) from [<bf06b04c>] (ti_st_close+0x3c/0x84 [btwilink]) [ 1358.545837] [<bf06b04c>] (ti_st_close+0x3c/0x84 [btwilink]) from [<bf01f84c>] (hci_dev_do_close+0x104/0x1e4 [bluetooth]) [ 1358.557342] [<bf01f84c>] (hci_dev_do_close+0x104/0x1e4 [bluetooth]) from [<bf0202e8>] (hci_dev_close+0x14/0x68 [bluetooth]) [ 1358.569091] [<bf0202e8>] (hci_dev_close+0x14/0x68 [bluetooth]) from [<bf02bfbc>] (hci_sock_ioctl+0x190/0x3cc [bluetooth]) [ 1358.580657] [<bf02bfbc>] (hci_sock_ioctl+0x190/0x3cc [bluetooth]) from [<c04a8b14>] (sock_ioctl+0x70/0x264) [ 1358.590911] [<c04a8b14>] (sock_ioctl+0x70/0x264) from [<c00e7404>] (do_vfs_ioctl+0x80/0x534) [ 1358.599822] [<c00e7404>] (do_vfs_ioctl+0x80/0x534) from [<c00e7924>] (sys_ioctl+0x6c/0x7c) [ 1358.608520] [<c00e7924>] (sys_ioctl+0x6c/0x7c) from [<c00133a0>] (ret_fast_syscall+0x0/0x30) [ 1358.617401] [ 1358.617401] sending IPI to all other CPUs: [ 1538.632690] INFO: rcu_preempt detected stalls on CPUs/tasks: { 0} (detected by 1, t=53826 jiffies) [ 1538.642120] Backtrace for cpu 1 (current): [ 1538.646453] [<c0019fb4>] (unwind_backtrace+0x0/0xf8) from [<c00183bc>] (smp_send_all_cpu_backtrace+0x5c/0xc0) [ 1538.656890] [<c00183bc>] (smp_send_all_cpu_backtrace+0x5c/0xc0) from [<c008a7b4>] (__rcu_pending+0x39c/0x418) [ 1538.667327] [<c008a7b4>] (__rcu_pending+0x39c/0x418) from [<c008b360>] (rcu_check_callbacks+0x194/0x2a4) [ 1538.677337] [<c008b360>] (rcu_check_callbacks+0x194/0x2a4) from [<c0052dc4>] (update_process_times+0x38/0x4c) [ 1538.687774] [<c0052dc4>] (update_process_times+0x38/0x4c) from [<c0071804>] (tick_sched_timer+0x88/0xd8) [ 1538.697753] [<c0071804>] (tick_sched_timer+0x88/0xd8) from [<c0065b14>] (__run_hrtimer+0x7c/0x278) [ 1538.707183] [<c0065b14>] (__run_hrtimer+0x7c/0x278) from [<c0066900>] (hrtimer_interrupt+0x114/0x2a0) [ 1538.716918] [<c0066900>] (hrtimer_interrupt+0x114/0x2a0) from [<c0018c14>] (twd_handler+0x30/0x44) [ 1538.726348] [<c0018c14>] (twd_handler+0x30/0x44) from [<c0086b44>] (handle_percpu_devid_irq+0x90/0x180) [ 1538.736236] [<c0086b44>] (handle_percpu_devid_irq+0x90/0x180) from [<c0083434>] (generic_handle_irq+0x28/0x3c) [ 1538.746795] [<c0083434>] (generic_handle_irq+0x28/0x3c) from [<c0014298>] (handle_IRQ+0x4c/0xb0) [ 1538.756042] [<c0014298>] (handle_IRQ+0x4c/0xb0) from [<c06288f4>] (__irq_svc+0x34/0xac) [ 1538.764465] [<c06288f4>] (__irq_svc+0x34/0xac) from [<c062847c>] (__raw_spin_lock_irqsave+0x80/0xa8) [ 1538.774108] [<c062847c>] (__raw_spin_lock_irqsave+0x80/0xa8) from [<bf0141fc>] (st_unregister+0x38/0x144 [st_drv]) [ 1538.785003] [<bf0141fc>] (st_unregister+0x38/0x144 [st_drv]) from [<bf06b04c>] (ti_st_close+0x3c/0x84 [btwilink]) [ 1538.795837] [<bf06b04c>] (ti_st_close+0x3c/0x84 [btwilink]) from [<bf01f84c>] (hci_dev_do_close+0x104/0x1e4 [bluetooth]) [ 1538.807342] [<bf01f84c>] (hci_dev_do_close+0x104/0x1e4 [bluetooth]) from [<bf0202e8>] (hci_dev_close+0x14/0x68 [bluetooth]) [ 1538.819091] [<bf0202e8>] (hci_dev_close+0x14/0x68 [bluetooth]) from [<bf02bfbc>] (hci_sock_ioctl+0x190/0x3cc [bluetooth]) [ 1538.830657] [<bf02bfbc>] (hci_sock_ioctl+0x190/0x3cc [bluetooth]) from [<c04a8b14>] (sock_ioctl+0x70/0x264) [ 1538.840911] [<c04a8b14>] (sock_ioctl+0x70/0x264) from [<c00e7404>] (do_vfs_ioctl+0x80/0x534) [ 1538.849822] [<c00e7404>] (do_vfs_ioctl+0x80/0x534) from [<c00e7924>] (sys_ioctl+0x6c/0x7c) [ 1538.858520] [<c00e7924>] (sys_ioctl+0x6c/0x7c) from [<c00133a0>] (ret_fast_syscall+0x0/0x30) [ 1538.867401] [ 1538.867401] sending IPI to all other CPUs:
I'm not sure if this is specific to snowball, or even if it is related to bluetooth. I just hit a backtrace that appears to be the same on a pandaboard after transferring a file over USB and letting it sit idle for a few minutes with an open adb shell connection: backtrace+ 0x0/0xf8) from [<c00183bc>] (smp_send_ all_cpu_ backtrace+ 0x5c/0xc0) all_cpu_ backtrace+ 0x5c/0xc0) from [<c008a7b4>] (__rcu_ pending+ 0x39c/0x418) pending+ 0x39c/0x418) from [<c008b360>] (rcu_check_ callbacks+ 0x194/0x2a4) callbacks+ 0x194/0x2a4) from [<c0052dc4>] (update_ process_ times+0x38/ 0x4c) process_ times+0x38/ 0x4c) from [<c0071804>] (tick_sched_ timer+0x88/ 0xd8) timer+0x88/ 0xd8) from [<c0065b14>] (__run_ hrtimer+ 0x7c/0x278) hrtimer+ 0x7c/0x278) from [<c0066900>] (hrtimer_ interrupt+ 0x114/0x2a0) interrupt+ 0x114/0x2a0) from [<c0018c14>] (twd_handler+ 0x30/0x44) 0x30/0x44) from [<c0086b44>] (handle_ percpu_ devid_irq+ 0x90/0x180) percpu_ devid_irq+ 0x90/0x180) from [<c0083434>] (generic_ handle_ irq+0x28/ 0x3c) handle_ irq+0x28/ 0x3c) from [<c0014298>] (handle_ IRQ+0x4c/ 0xb0) IRQ+0x4c/ 0xb0) from [<c06288f4>] (__irq_ svc+0x34/ 0xac) svc+0x34/ 0xac) from [<c0628484>] (__raw_ spin_lock_ irqsave+ 0x88/0xa8) spin_lock_ irqsave+ 0x88/0xa8) from [<bf0141fc>] (st_unregister+ 0x38/0x144 [st_drv]) 0x38/0x144 [st_drv]) from [<bf06b04c>] (ti_st_ close+0x3c/ 0x84 [btwilink]) close+0x3c/ 0x84 [btwilink]) from [<bf01f84c>] (hci_dev_ do_close+ 0x104/0x1e4 [bluetooth]) do_close+ 0x104/0x1e4 [bluetooth]) from [<bf0202e8>] (hci_dev_ close+0x14/ 0x68 [bluetooth]) close+0x14/ 0x68 [bluetooth]) from [<bf02bfbc>] (hci_sock_ ioctl+0x190/ 0x3cc [bluetooth]) ioctl+0x190/ 0x3cc [bluetooth]) from [<c04a8b14>] (sock_ioctl+ 0x70/0x264) 0x70/0x264) from [<c00e7404>] (do_vfs_ ioctl+0x80/ 0x534) ioctl+0x80/ 0x534) from [<c00e7924>] (sys_ioctl+ 0x6c/0x7c) 0x6c/0x7c) from [<c00133a0>] (ret_fast_ syscall+ 0x0/0x30) backtrace+ 0x0/0xf8) from [<c00183bc>] (smp_send_ all_cpu_ backtrace+ 0x5c/0xc0) all_cpu_ backtrace+ 0x5c/0xc0) from [<c008a7b4>] (__rcu_ pending+ 0x39c/0x418) pending+ 0x39c/0x418) from [<c008b360>] (rcu_check_ callbacks+ 0x194/0x2a4) callbacks+ 0x194/0x2a4) from [<c0052dc4>] (update_ process_ times+0x38/ 0x4c) process_ times+0x38/ 0x4c) from [<c0071804>] (tick_sched_ timer+0x88/ 0xd8) timer+0x88/ 0xd8) from [<c0065b14>] (__run_ hrtimer+ 0x7c/0x278) hrtimer+ 0x7c/0x278) from [<c0066900>] (hrtimer_ interrupt+ 0x114/0x2a0) interrupt+ 0x114/0x2a0) from [<c0018c14>] (twd_handler+ 0x30/0x44) 0x30/0x44) from [<c0086b44>] (handle_ percpu_ devid_irq+ 0x90/0x180) percpu_ devid_irq+ 0x90/0x180) from [<c0083434>] (generic_ handle_ irq+0x28/ 0x3c) handle_ irq+0x28/ 0x3c) from [<c0014298>] (handle_ IRQ+0x4c/ 0xb0) IRQ+0x4c/ 0xb0) from [<c06288f4>] (__irq_ svc+0x34/ 0xac) svc+0x34/ 0xac) from [<c062847c>] (__raw_ spin_lock_ irqsave+ 0x80/0xa8) spin_lock_ irqsave+ 0x80/0xa8) from [<bf0141fc>] (st_unregister+ 0x38/0x144 [st_drv]) 0x38/0x144 [st_drv]) from [<bf06b04c>] (ti_st_ close+0x3c/ 0x84 [btwilink]) close+0x3c/ 0x84 [btwilink]) from [<bf01f84c>] (hci_dev_ do_close+ 0x104/0x1e4 [bluetooth]) do_close+ 0x104/0x1e4 [bluetooth]) from [<bf0202e8>] (hci_dev_ close+0x14/ 0x68 [bluetooth]) close+0x14/ 0x68 [bluetooth]) from [<bf02bfbc>] (hci_sock_ ioctl+0x190/ 0x3cc [bluetooth]) ioctl+0x190/ 0x3cc [bluetooth]) from [<c04a8b14>] (sock_ioctl+ 0x70/0x264) 0x70/0x264) from [<c00e7404>] (do_vfs_ ioctl+0x80/ 0x534) ioctl+0x80/ 0x534) from [<c00e7924>] (sys_ioctl+ 0x6c/0x7c) 0x6c/0x7c) from [<c00133a0>] (ret_fast_ syscall+ 0x0/0x30) backtrace+ 0x0/0xf8) from [<c00183bc>] (smp_send_ all_cpu_ backtrace+ 0x5c/0xc0) all_cpu_ backtrace+ 0x5c/0xc0) from [<c008a7b4>] (__rcu_ pending+ 0x39c/0x418) pending+ 0x39c/0x418) from [<c008b360>] (rcu_check_ callbacks+ 0x194/0x2a4) callbacks+ 0x194/0x2a4) from [<c0052dc4>] (update_ process_ times+0x38/ 0x4c) process_ times+0x38/ 0x4c) from [<c0071804>] (tick_sched_ timer+0x88/ 0xd8) timer+0x88/ 0xd8) from [<c0065b14>] (__run_ hrtimer+ 0x7c/0x278) hrtimer+ 0x7c/0x278) from [<c0066900>] (hrtimer_ interrupt+ 0x114/0x2a0) interrupt+ 0x114/0x2a0) from [<c0018c14>] (twd_handler+ 0x30/0x44) 0x30/0x44) from [<c0086b44>] (handle_ percpu_ devid_irq+ 0x90/0x180) percpu_ devid_irq+ 0x90/0x180) from [<c0083434>] (generic_ handle_ irq+0x28/ 0x3c) handle_ irq+0x28/ 0x3c) from [<c0014298>] (handle_ IRQ+0x4c/ 0xb0) IRQ+0x4c/ 0xb0) from [<c06288f4>] (__irq_ svc+0x34/ 0xac) svc+0x34/ 0xac) from [<c062847c>] (__raw_ spin_lock_ irqsave+ 0x80/0xa8) spin_lock_ irqsave+ 0x80/0xa8) from [<bf0141fc>] (st_unregister+ 0x38/0x144 [st_drv]) 0x38/0x144 [st_drv]) from [<bf06b04c>] (ti_st_ close+0x3c/ 0x84 [btwilink]) close+0x3c/ 0x84 [btwilink]) from [<bf01f84c>] (hci_dev_ do_close+ 0x104/0x1e4 [bluetooth]) do_close+ 0x104/0x1e4 [bluetooth]) from [<bf0202e8>] (hci_dev_ close+0x14/ 0x68 [bluetooth]) close+0x14/ 0x68 [bluetooth]) from [<bf02bfbc>] (hci_sock_ ioctl+0x190/ 0x3cc [bluetooth]) ioctl+0x190/ 0x3cc [bluetooth]) from [<c04a8b14>] (sock_ioctl+ 0x70/0x264) 0x70/0x264) from [<c00e7404>] (do_vfs_ ioctl+0x80/ 0x534) ioctl+0x80/ 0x534) from [<c00e7924>] (sys_ioctl+ 0x6c/0x7c) 0x6c/0x7c) from [<c00133a0>] (ret_fast_ syscall+ 0x0/0x30)
[ 1178.132659] INFO: rcu_preempt detected stalls on CPUs/tasks: { 0} (detected by 1, t=7682 jiffies)
[ 1178.141998] Backtrace for cpu 1 (current):
[ 1178.146331] [<c0019fb4>] (unwind_
[ 1178.156799] [<c00183bc>] (smp_send_
[ 1178.167236] [<c008a7b4>] (__rcu_
[ 1178.177215] [<c008b360>] (rcu_check_
[ 1178.187683] [<c0052dc4>] (update_
[ 1178.197662] [<c0071804>] (tick_sched_
[ 1178.207092] [<c0065b14>] (__run_
[ 1178.216796] [<c0066900>] (hrtimer_
[ 1178.226226] [<c0018c14>] (twd_handler+
[ 1178.236145] [<c0086b44>] (handle_
[ 1178.246673] [<c0083434>] (generic_
[ 1178.255950] [<c0014298>] (handle_
[ 1178.264343] [<c06288f4>] (__irq_
[ 1178.273986] [<c0628484>] (__raw_
[ 1178.284881] [<bf0141fc>] (st_unregister+
[ 1178.295806] [<bf06b04c>] (ti_st_
[ 1178.307281] [<bf01f84c>] (hci_dev_
[ 1178.319061] [<bf0202e8>] (hci_dev_
[ 1178.330596] [<bf02bfbc>] (hci_sock_
[ 1178.340850] [<c04a8b14>] (sock_ioctl+
[ 1178.349731] [<c00e7404>] (do_vfs_
[ 1178.358428] [<c00e7924>] (sys_ioctl+
[ 1178.367309]
[ 1178.367309] sending IPI to all other CPUs:
[ 1358.382690] INFO: rcu_preempt detected stalls on CPUs/tasks: { 0} (detected by 1, t=30754 jiffies)
[ 1358.392120] Backtrace for cpu 1 (current):
[ 1358.396453] [<c0019fb4>] (unwind_
[ 1358.406890] [<c00183bc>] (smp_send_
[ 1358.417327] [<c008a7b4>] (__rcu_
[ 1358.427337] [<c008b360>] (rcu_check_
[ 1358.437774] [<c0052dc4>] (update_
[ 1358.447753] [<c0071804>] (tick_sched_
[ 1358.457214] [<c0065b14>] (__run_
[ 1358.466918] [<c0066900>] (hrtimer_
[ 1358.476348] [<c0018c14>] (twd_handler+
[ 1358.486236] [<c0086b44>] (handle_
[ 1358.496795] [<c0083434>] (generic_
[ 1358.506042] [<c0014298>] (handle_
[ 1358.514465] [<c06288f4>] (__irq_
[ 1358.524108] [<c062847c>] (__raw_
[ 1358.535003] [<bf0141fc>] (st_unregister+
[ 1358.545837] [<bf06b04c>] (ti_st_
[ 1358.557342] [<bf01f84c>] (hci_dev_
[ 1358.569091] [<bf0202e8>] (hci_dev_
[ 1358.580657] [<bf02bfbc>] (hci_sock_
[ 1358.590911] [<c04a8b14>] (sock_ioctl+
[ 1358.599822] [<c00e7404>] (do_vfs_
[ 1358.608520] [<c00e7924>] (sys_ioctl+
[ 1358.617401]
[ 1358.617401] sending IPI to all other CPUs:
[ 1538.632690] INFO: rcu_preempt detected stalls on CPUs/tasks: { 0} (detected by 1, t=53826 jiffies)
[ 1538.642120] Backtrace for cpu 1 (current):
[ 1538.646453] [<c0019fb4>] (unwind_
[ 1538.656890] [<c00183bc>] (smp_send_
[ 1538.667327] [<c008a7b4>] (__rcu_
[ 1538.677337] [<c008b360>] (rcu_check_
[ 1538.687774] [<c0052dc4>] (update_
[ 1538.697753] [<c0071804>] (tick_sched_
[ 1538.707183] [<c0065b14>] (__run_
[ 1538.716918] [<c0066900>] (hrtimer_
[ 1538.726348] [<c0018c14>] (twd_handler+
[ 1538.736236] [<c0086b44>] (handle_
[ 1538.746795] [<c0083434>] (generic_
[ 1538.756042] [<c0014298>] (handle_
[ 1538.764465] [<c06288f4>] (__irq_
[ 1538.774108] [<c062847c>] (__raw_
[ 1538.785003] [<bf0141fc>] (st_unregister+
[ 1538.795837] [<bf06b04c>] (ti_st_
[ 1538.807342] [<bf01f84c>] (hci_dev_
[ 1538.819091] [<bf0202e8>] (hci_dev_
[ 1538.830657] [<bf02bfbc>] (hci_sock_
[ 1538.840911] [<c04a8b14>] (sock_ioctl+
[ 1538.849822] [<c00e7404>] (do_vfs_
[ 1538.858520] [<c00e7924>] (sys_ioctl+
[ 1538.867401]
[ 1538.867401] sending IPI to all other CPUs: