March 14, 201511 yr Another CPU stall - might be due to unplugging VGA cable... that seemed to coincide with several CPU stalls a few months ago. I got no resolution -- I just stopped doing it. ;-) Syslog: Mar 13 14:54:35 Tower9 kernel: INFO: rcu_sched self-detected stall on CPU { 3} (t=6000 jiffies g=1426683 c=1426682 q=5350) Mar 13 14:54:35 Tower9 kernel: Task dump for CPU 3: Mar 13 14:54:35 Tower9 kernel: scsi_eh_0 R running task 0 993 2 0x00000008 Mar 13 14:54:35 Tower9 kernel: 0000000000000000 ffff88043fb83de8 ffffffff8105cc09 0000000000000003 Mar 13 14:54:35 Tower9 kernel: 0000000000000003 ffff88043fb83e00 ffffffff8105f2c4 ffffffff81822d00 Mar 13 14:54:35 Tower9 kernel: ffff88043fb83e30 ffffffff810766a5 ffffffff81822d00 ffff88043fb8e0c0 Mar 13 14:54:35 Tower9 kernel: Call Trace: Mar 13 14:54:35 Tower9 kernel: <IRQ> [<ffffffff8105cc09>] sched_show_task+0xbe/0xc3 Mar 13 14:54:35 Tower9 kernel: [<ffffffff8105f2c4>] dump_cpu_task+0x34/0x38 Mar 13 14:54:35 Tower9 kernel: [<ffffffff810766a5>] rcu_dump_cpu_stacks+0x6a/0x8c Mar 13 14:54:35 Tower9 kernel: [<ffffffff81078ead>] rcu_check_callbacks+0x1e1/0x4ff Mar 13 14:54:35 Tower9 kernel: [<ffffffff81086659>] ? tick_sched_handle+0x34/0x34 Mar 13 14:54:35 Tower9 kernel: [<ffffffff8107ac1a>] update_process_times+0x38/0x60 Mar 13 14:54:35 Tower9 kernel: [<ffffffff81086657>] tick_sched_handle+0x32/0x34 Mar 13 14:54:35 Tower9 kernel: [<ffffffff8108668e>] tick_sched_timer+0x35/0x53 Mar 13 14:54:35 Tower9 kernel: [<ffffffff8107b149>] __run_hrtimer.isra.29+0x57/0xb0 Mar 13 14:54:35 Tower9 kernel: [<ffffffff8107b634>] hrtimer_interrupt+0xd9/0x1c0 Mar 13 14:54:35 Tower9 kernel: [<ffffffff8102ea78>] local_apic_timer_interrupt+0x4f/0x52 Mar 13 14:54:35 Tower9 kernel: [<ffffffff8102ee4a>] smp_apic_timer_interrupt+0x3a/0x4b Mar 13 14:54:35 Tower9 kernel: [<ffffffff815ead9d>] apic_timer_interrupt+0x6d/0x80 Mar 13 14:54:35 Tower9 kernel: <EOI> [<ffffffff81065b3e>] ? pick_next_task_fair+0x22b/0x40f Mar 13 14:54:35 Tower9 kernel: [<ffffffff81065b3e>] ? pick_next_task_fair+0x22b/0x40f Mar 13 14:54:35 Tower9 kernel: [<ffffffffa00013bf>] ? arcmsr_get_firmware_spec+0x1c7/0x505 [arcmsr] Mar 13 14:54:35 Tower9 kernel: [<ffffffffa0002dbc>] arcmsr_bus_reset+0x3d1/0x4b4 [arcmsr] Mar 13 14:54:35 Tower9 kernel: [<ffffffff814161e1>] ? put_device+0x12/0x14 Mar 13 14:54:35 Tower9 kernel: [<ffffffff81436a20>] ? scsi_device_put+0x3e/0x43 Mar 13 14:54:35 Tower9 kernel: [<ffffffff814395ec>] scsi_try_bus_reset+0x29/0x7a Mar 13 14:54:35 Tower9 kernel: [<ffffffff8143a696>] scsi_eh_ready_devs+0x407/0x5a4 Mar 13 14:54:35 Tower9 kernel: [<ffffffff8143b15d>] scsi_error_handler+0x247/0x48a Mar 13 14:54:35 Tower9 kernel: [<ffffffff8105d0dd>] ? default_wake_function+0xd/0xf Mar 13 14:54:35 Tower9 kernel: [<ffffffff8143af16>] ? scsi_eh_get_sense+0xd4/0xd4 Mar 13 14:54:35 Tower9 kernel: [<ffffffff8105617e>] kthread+0xd6/0xde Mar 13 14:54:35 Tower9 kernel: [<ffffffff810560a8>] ? kthread_create_on_node+0x168/0x168 Mar 13 14:54:35 Tower9 kernel: [<ffffffff815e9efc>] ret_from_fork+0x7c/0xb0 Mar 13 14:54:35 Tower9 kernel: [<ffffffff810560a8>] ? kthread_create_on_node+0x168/0x168 Mar 13 14:57:36 Tower9 kernel: INFO: rcu_sched self-detected stall on CPU { 3} (t=24003 jiffies g=1426683 c=1426682 q=20563) Mar 13 14:57:36 Tower9 kernel: Task dump for CPU 3: Mar 13 14:57:36 Tower9 kernel: scsi_eh_0 R running task 0 993 2 0x00000008 Mar 13 14:57:36 Tower9 kernel: 0000000000000000 ffff88043fb83de8 ffffffff8105cc09 0000000000000003 Mar 13 14:57:36 Tower9 kernel: 0000000000000003 ffff88043fb83e00 ffffffff8105f2c4 ffffffff81822d00 Mar 13 14:57:36 Tower9 kernel: ffff88043fb83e30 ffffffff810766a5 ffffffff81822d00 ffff88043fb8e0c0 Mar 13 14:57:36 Tower9 kernel: Call Trace: Mar 13 14:57:36 Tower9 kernel: <IRQ> [<ffffffff8105cc09>] sched_show_task+0xbe/0xc3 Mar 13 14:57:36 Tower9 kernel: [<ffffffff8105f2c4>] dump_cpu_task+0x34/0x38 Mar 13 14:57:36 Tower9 kernel: [<ffffffff810766a5>] rcu_dump_cpu_stacks+0x6a/0x8c Mar 13 14:57:36 Tower9 kernel: [<ffffffff81078ead>] rcu_check_callbacks+0x1e1/0x4ff Mar 13 14:57:36 Tower9 kernel: [<ffffffff81086659>] ? tick_sched_handle+0x34/0x34 Mar 13 14:57:36 Tower9 kernel: [<ffffffff8107ac1a>] update_process_times+0x38/0x60 Mar 13 14:57:36 Tower9 kernel: [<ffffffff81086657>] tick_sched_handle+0x32/0x34 Mar 13 14:57:36 Tower9 kernel: [<ffffffff8108668e>] tick_sched_timer+0x35/0x53 Mar 13 14:57:36 Tower9 kernel: [<ffffffff8107b149>] __run_hrtimer.isra.29+0x57/0xb0 Mar 13 14:57:36 Tower9 kernel: [<ffffffff8107b634>] hrtimer_interrupt+0xd9/0x1c0 Mar 13 14:57:36 Tower9 kernel: [<ffffffff8102ea78>] local_apic_timer_interrupt+0x4f/0x52 Mar 13 14:57:36 Tower9 kernel: [<ffffffff8102ee4a>] smp_apic_timer_interrupt+0x3a/0x4b Mar 13 14:57:36 Tower9 kernel: [<ffffffff815ead9d>] apic_timer_interrupt+0x6d/0x80 Mar 13 14:57:36 Tower9 kernel: <EOI> [<ffffffff81065b3e>] ? pick_next_task_fair+0x22b/0x40f Mar 13 14:57:36 Tower9 kernel: [<ffffffff81065b3e>] ? pick_next_task_fair+0x22b/0x40f Mar 13 14:57:36 Tower9 kernel: [<ffffffffa00013bf>] ? arcmsr_get_firmware_spec+0x1c7/0x505 [arcmsr] Mar 13 14:57:36 Tower9 kernel: [<ffffffffa0002dbc>] arcmsr_bus_reset+0x3d1/0x4b4 [arcmsr] Mar 13 14:57:36 Tower9 kernel: [<ffffffff814161e1>] ? put_device+0x12/0x14 Mar 13 14:57:36 Tower9 kernel: [<ffffffff81436a20>] ? scsi_device_put+0x3e/0x43 Mar 13 14:57:36 Tower9 kernel: [<ffffffff814395ec>] scsi_try_bus_reset+0x29/0x7a Mar 13 14:57:36 Tower9 kernel: [<ffffffff8143a696>] scsi_eh_ready_devs+0x407/0x5a4 Mar 13 14:57:36 Tower9 kernel: [<ffffffff8143b15d>] scsi_error_handler+0x247/0x48a Mar 13 14:57:36 Tower9 kernel: [<ffffffff8105d0dd>] ? default_wake_function+0xd/0xf Mar 13 14:57:36 Tower9 kernel: [<ffffffff8143af16>] ? scsi_eh_get_sense+0xd4/0xd4 Mar 13 14:57:36 Tower9 kernel: [<ffffffff8105617e>] kthread+0xd6/0xde Mar 13 14:57:36 Tower9 kernel: [<ffffffff810560a8>] ? kthread_create_on_node+0x168/0x168 Mar 13 14:57:36 Tower9 kernel: [<ffffffff815e9efc>] ret_from_fork+0x7c/0xb0 Mar 13 14:57:36 Tower9 kernel: [<ffffffff810560a8>] ? kthread_create_on_node+0x168/0x168 Mar 13 15:00:36 Tower9 kernel: INFO: rcu_sched self-detected stall on CPU { 3} (t=42006 jiffies g=1426683 c=1426682 q=35904) Mar 13 15:00:36 Tower9 kernel: Task dump for CPU 3: Mar 13 15:00:36 Tower9 kernel: scsi_eh_0 R running task 0 993 2 0x00000008 Mar 13 15:00:36 Tower9 kernel: 0000000000000000 ffff88043fb83de8 ffffffff8105cc09 0000000000000003 Mar 13 15:00:36 Tower9 kernel: 0000000000000003 ffff88043fb83e00 ffffffff8105f2c4 ffffffff81822d00 Mar 13 15:00:36 Tower9 kernel: ffff88043fb83e30 ffffffff810766a5 ffffffff81822d00 ffff88043fb8e0c0 Mar 13 15:00:36 Tower9 kernel: Call Trace: Mar 13 15:00:36 Tower9 kernel: <IRQ> [<ffffffff8105cc09>] sched_show_task+0xbe/0xc3 Mar 13 15:00:36 Tower9 kernel: [<ffffffff8105f2c4>] dump_cpu_task+0x34/0x38 Mar 13 15:00:36 Tower9 kernel: [<ffffffff810766a5>] rcu_dump_cpu_stacks+0x6a/0x8c Mar 13 15:00:36 Tower9 kernel: [<ffffffff81078ead>] rcu_check_callbacks+0x1e1/0x4ff Mar 13 15:00:36 Tower9 kernel: [<ffffffff81086659>] ? tick_sched_handle+0x34/0x34 Mar 13 15:00:36 Tower9 kernel: [<ffffffff8107ac1a>] update_process_times+0x38/0x60 Mar 13 15:00:36 Tower9 kernel: [<ffffffff81086657>] tick_sched_handle+0x32/0x34 Mar 13 15:00:36 Tower9 kernel: [<ffffffff8108668e>] tick_sched_timer+0x35/0x53 Mar 13 15:00:36 Tower9 kernel: [<ffffffff8107b149>] __run_hrtimer.isra.29+0x57/0xb0 Mar 13 15:00:36 Tower9 kernel: [<ffffffff8107b634>] hrtimer_interrupt+0xd9/0x1c0 Mar 13 15:00:36 Tower9 kernel: [<ffffffff8102ea78>] local_apic_timer_interrupt+0x4f/0x52 Mar 13 15:00:36 Tower9 kernel: [<ffffffff8102ee4a>] smp_apic_timer_interrupt+0x3a/0x4b Mar 13 15:00:36 Tower9 kernel: [<ffffffff815ead9d>] apic_timer_interrupt+0x6d/0x80 Mar 13 15:00:36 Tower9 kernel: <EOI> [<ffffffff81065b3e>] ? pick_next_task_fair+0x22b/0x40f Mar 13 15:00:36 Tower9 kernel: [<ffffffff81065b3e>] ? pick_next_task_fair+0x22b/0x40f Mar 13 15:00:36 Tower9 kernel: [<ffffffffa00013bf>] ? arcmsr_get_firmware_spec+0x1c7/0x505 [arcmsr] Mar 13 15:00:36 Tower9 kernel: [<ffffffffa0002dbc>] arcmsr_bus_reset+0x3d1/0x4b4 [arcmsr] Mar 13 15:00:36 Tower9 kernel: [<ffffffff814161e1>] ? put_device+0x12/0x14 Mar 13 15:00:36 Tower9 kernel: [<ffffffff81436a20>] ? scsi_device_put+0x3e/0x43 Mar 13 15:00:36 Tower9 kernel: [<ffffffff814395ec>] scsi_try_bus_reset+0x29/0x7a Mar 13 15:00:36 Tower9 kernel: [<ffffffff8143a696>] scsi_eh_ready_devs+0x407/0x5a4 Mar 13 15:00:36 Tower9 kernel: [<ffffffff8143b15d>] scsi_error_handler+0x247/0x48a Mar 13 15:00:36 Tower9 kernel: [<ffffffff8105d0dd>] ? default_wake_function+0xd/0xf Mar 13 15:00:36 Tower9 kernel: [<ffffffff8143af16>] ? scsi_eh_get_sense+0xd4/0xd4 Mar 13 15:00:36 Tower9 kernel: [<ffffffff8105617e>] kthread+0xd6/0xde Mar 13 15:00:36 Tower9 kernel: [<ffffffff810560a8>] ? kthread_create_on_node+0x168/0x168 Mar 13 15:00:36 Tower9 kernel: [<ffffffff815e9efc>] ret_from_fork+0x7c/0xb0 Mar 13 15:00:36 Tower9 kernel: [<ffffffff810560a8>] ? kthread_create_on_node+0x168/0x168
March 15, 201511 yr Pretty sure I know what's going on... What were you doing in the unRaid server at the time? Was there an active parity operation in progress?
March 16, 201511 yr Author What were you doing in the unRaid server at the time? Was there an active parity operation in progress? Not a thing. No I/O to speak of... no parity operations. No parity check since January. I just needed to move the monitor to another box for a while.
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