March 23, 201511 yr I was running MD5 checks on every disk in my array and tried to use Samba to the disk where all of the MD5 results are written (that disk not one of the disk being checked). The Samba load didn't resolve for well over a minute, and I killed it. Seeing this in my syslog Mar 22 21:39:07 Shark login[10695]: ROOT LOGIN on '/dev/pts/0' from 'DELTA.home' (Logins) Mar 22 21:54:21 Shark emhttp: read_line: client closed the connection (Other emhttp) Mar 22 21:55:06 Shark kernel: INFO: rcu_sched self-detected stall on CPU { 7} (t=6001 jiffies g=5433469 c=5433468 q=133952) Mar 22 21:55:06 Shark kernel: Task dump for CPU 7: Mar 22 21:55:06 Shark kernel: unraidd R running task 0 2895 2 0x00000008 Mar 22 21:55:06 Shark kernel: 0000000000000000 ffff88042fdc3da8 ffffffff8105e0b5 0000000000000007 Mar 22 21:55:06 Shark kernel: 0000000000000007 ffff88042fdc3dc8 ffffffff81060780 0000000000000080 Mar 22 21:55:06 Shark kernel: ffffffff81834400 ffff88042fdc3df8 ffffffff8107845f ffffffff81834400 Mar 22 21:55:06 Shark kernel: Call Trace: (Errors) Mar 22 21:55:06 Shark kernel: <IRQ> [<ffffffff8105e0b5>] sched_show_task+0xbe/0xc3 Mar 22 21:55:06 Shark kernel: [<ffffffff81060780>] dump_cpu_task+0x35/0x39 Mar 22 21:55:06 Shark kernel: [<ffffffff8107845f>] rcu_dump_cpu_stacks+0x6a/0x8c Mar 22 21:55:06 Shark kernel: [<ffffffff8107acb5>] rcu_check_callbacks+0x1db/0x4f9 Mar 22 21:55:06 Shark kernel: [<ffffffff81088601>] ? tick_sched_handle+0x34/0x34 Mar 22 21:55:06 Shark kernel: [<ffffffff8107ca53>] update_process_times+0x3a/0x64 Mar 22 21:55:06 Shark kernel: [<ffffffff810885ff>] tick_sched_handle+0x32/0x34 Mar 22 21:55:06 Shark kernel: [<ffffffff81088638>] tick_sched_timer+0x37/0x61 Mar 22 21:55:06 Shark kernel: [<ffffffff8107cf9b>] __run_hrtimer.isra.29+0x57/0xb0 Mar 22 21:55:06 Shark kernel: [<ffffffff8107d48a>] hrtimer_interrupt+0xd9/0x1c0 Mar 22 21:55:06 Shark kernel: [<ffffffff8102f72e>] local_apic_timer_interrupt+0x50/0x54 Mar 22 21:55:06 Shark kernel: [<ffffffff8102fb0b>] smp_apic_timer_interrupt+0x3c/0x4e Mar 22 21:55:06 Shark kernel: [<ffffffff815fdf7d>] apic_timer_interrupt+0x6d/0x80 Mar 22 21:55:06 Shark kernel: <EOI> [<ffffffffa01a3c5d>] ? copy_data+0x7c/0x1db [md_mod] Mar 22 21:55:06 Shark kernel: [<ffffffffa01a433a>] handle_stripe+0x45f/0x120f [md_mod] Mar 22 21:55:06 Shark kernel: [<ffffffffa01a59e4>] unraidd+0xda/0x194 [md_mod] Mar 22 21:55:06 Shark kernel: [<ffffffffa01a10d2>] md_thread+0xd2/0xe8 [md_mod] Mar 22 21:55:06 Shark kernel: [<ffffffff8106bacc>] ? __wake_up_sync+0xd/0xd Mar 22 21:55:06 Shark kernel: [<ffffffffa01a1000>] ? 0xffffffffa01a1000 Mar 22 21:55:06 Shark kernel: [<ffffffff81057486>] kthread+0xd6/0xde Mar 22 21:55:06 Shark kernel: [<ffffffff810573b0>] ? kthread_create_on_node+0x172/0x172 Mar 22 21:55:06 Shark kernel: [<ffffffff815fd0fc>] ret_from_fork+0x7c/0xb0 Mar 22 21:55:06 Shark kernel: [<ffffffff810573b0>] ? kthread_create_on_node+0x172/0x172 Mar 22 21:57:17 Shark in.telnetd[18289]: connect from 192.168.1.7 (192.168.1.7) (Routine) Mar 22 21:57:17 Shark login[18290]: ROOT LOGIN on '/dev/pts/1' from 'DELTA.home' (Logins) Mar 22 21:58:34 Shark kernel: INFO: rcu_sched self-detected stall on CPU { 7} (t=6000 jiffies g=5433517 c=5433516 q=127925) Mar 22 21:58:34 Shark kernel: Task dump for CPU 7: Mar 22 21:58:34 Shark kernel: unraidd R running task 0 2895 2 0x00000008 Mar 22 21:58:34 Shark kernel: 0000000000000000 ffff88042fdc3da8 ffffffff8105e0b5 0000000000000007 Mar 22 21:58:34 Shark kernel: 0000000000000007 ffff88042fdc3dc8 ffffffff81060780 0000000000000080 Mar 22 21:58:34 Shark kernel: ffffffff81834400 ffff88042fdc3df8 ffffffff8107845f ffffffff81834400 Mar 22 21:58:34 Shark kernel: Call Trace: (Errors) Mar 22 21:58:34 Shark kernel: <IRQ> [<ffffffff8105e0b5>] sched_show_task+0xbe/0xc3 Mar 22 21:58:34 Shark kernel: [<ffffffff81060780>] dump_cpu_task+0x35/0x39 Mar 22 21:58:34 Shark kernel: [<ffffffff8107845f>] rcu_dump_cpu_stacks+0x6a/0x8c Mar 22 21:58:34 Shark kernel: [<ffffffff8107acb5>] rcu_check_callbacks+0x1db/0x4f9 Mar 22 21:58:34 Shark kernel: [<ffffffff81088601>] ? tick_sched_handle+0x34/0x34 Mar 22 21:58:34 Shark kernel: [<ffffffff8107ca53>] update_process_times+0x3a/0x64 Mar 22 21:58:34 Shark kernel: [<ffffffff810885ff>] tick_sched_handle+0x32/0x34 Mar 22 21:58:34 Shark kernel: [<ffffffff81088638>] tick_sched_timer+0x37/0x61 Mar 22 21:58:34 Shark kernel: [<ffffffff8107cf9b>] __run_hrtimer.isra.29+0x57/0xb0 Mar 22 21:58:34 Shark kernel: [<ffffffff8107d48a>] hrtimer_interrupt+0xd9/0x1c0 Mar 22 21:58:34 Shark kernel: [<ffffffff8102f72e>] local_apic_timer_interrupt+0x50/0x54 Mar 22 21:58:34 Shark kernel: [<ffffffff8102fb0b>] smp_apic_timer_interrupt+0x3c/0x4e Mar 22 21:58:34 Shark kernel: [<ffffffff815fdf7d>] apic_timer_interrupt+0x6d/0x80 Mar 22 21:58:34 Shark kernel: <EOI> [<ffffffffa01a3ffa>] ? handle_stripe+0x11f/0x120f [md_mod] Mar 22 21:58:34 Shark kernel: [<ffffffffa01a3fe5>] ? handle_stripe+0x10a/0x120f [md_mod] Mar 22 21:58:34 Shark kernel: [<ffffffffa01a58f2>] ? release_stripe+0x75/0x8d [md_mod] Mar 22 21:58:34 Shark kernel: [<ffffffffa01a59e4>] unraidd+0xda/0x194 [md_mod] Mar 22 21:58:34 Shark kernel: [<ffffffffa01a10d2>] md_thread+0xd2/0xe8 [md_mod] Mar 22 21:58:34 Shark kernel: [<ffffffff8106bacc>] ? __wake_up_sync+0xd/0xd Mar 22 21:58:34 Shark kernel: [<ffffffffa01a1000>] ? 0xffffffffa01a1000 Mar 22 21:58:34 Shark kernel: [<ffffffff81057486>] kthread+0xd6/0xde Mar 22 21:58:34 Shark kernel: [<ffffffff810573b0>] ? kthread_create_on_node+0x172/0x172 Mar 22 21:58:34 Shark kernel: [<ffffffff815fd0fc>] ret_from_fork+0x7c/0xb0 Mar 22 21:58:34 Shark kernel: [<ffffffff810573b0>] ? kthread_create_on_node+0x172/0x172 Mar 22 22:01:34 Shark kernel: INFO: rcu_sched self-detected stall on CPU { 7} (t=24003 jiffies g=5433517 c=5433516 q=479022) Mar 22 22:01:34 Shark kernel: Task dump for CPU 7: Mar 22 22:01:34 Shark kernel: unraidd R running task 0 2895 2 0x00000008 Mar 22 22:01:34 Shark kernel: 0000000000000000 ffff88042fdc3da8 ffffffff8105e0b5 0000000000000007 Mar 22 22:01:34 Shark kernel: 0000000000000007 ffff88042fdc3dc8 ffffffff81060780 0000000000000080 Mar 22 22:01:34 Shark kernel: ffffffff81834400 ffff88042fdc3df8 ffffffff8107845f ffffffff81834400 Mar 22 22:01:34 Shark kernel: Call Trace: (Errors) Mar 22 22:01:34 Shark kernel: <IRQ> [<ffffffff8105e0b5>] sched_show_task+0xbe/0xc3 Mar 22 22:01:34 Shark kernel: [<ffffffff81060780>] dump_cpu_task+0x35/0x39 Mar 22 22:01:34 Shark kernel: [<ffffffff8107845f>] rcu_dump_cpu_stacks+0x6a/0x8c Mar 22 22:01:34 Shark kernel: [<ffffffff8107acb5>] rcu_check_callbacks+0x1db/0x4f9 Mar 22 22:01:34 Shark kernel: [<ffffffff81088601>] ? tick_sched_handle+0x34/0x34 Mar 22 22:01:34 Shark kernel: [<ffffffff8107ca53>] update_process_times+0x3a/0x64 Mar 22 22:01:34 Shark kernel: [<ffffffff810885ff>] tick_sched_handle+0x32/0x34 Mar 22 22:01:34 Shark kernel: [<ffffffff81088638>] tick_sched_timer+0x37/0x61 Mar 22 22:01:34 Shark kernel: [<ffffffff8107cf9b>] __run_hrtimer.isra.29+0x57/0xb0 Mar 22 22:01:34 Shark kernel: [<ffffffff8107d48a>] hrtimer_interrupt+0xd9/0x1c0 Mar 22 22:01:34 Shark kernel: [<ffffffff8102f72e>] local_apic_timer_interrupt+0x50/0x54 Mar 22 22:01:34 Shark kernel: [<ffffffff8102fb0b>] smp_apic_timer_interrupt+0x3c/0x4e Mar 22 22:01:34 Shark kernel: [<ffffffff815fdf7d>] apic_timer_interrupt+0x6d/0x80 Mar 22 22:01:34 Shark kernel: <EOI> [<ffffffffa01a3ffa>] ? handle_stripe+0x11f/0x120f [md_mod] Mar 22 22:01:34 Shark kernel: [<ffffffffa01a3fe5>] ? handle_stripe+0x10a/0x120f [md_mod] Mar 22 22:01:34 Shark kernel: [<ffffffffa01a585e>] ? _release_stripe+0x94/0xb3 [md_mod] Mar 22 22:01:34 Shark kernel: [<ffffffffa01a59e4>] unraidd+0xda/0x194 [md_mod] Mar 22 22:01:34 Shark kernel: [<ffffffffa01a10d2>] md_thread+0xd2/0xe8 [md_mod] Mar 22 22:01:34 Shark kernel: [<ffffffff8106bacc>] ? __wake_up_sync+0xd/0xd Mar 22 22:01:34 Shark kernel: [<ffffffffa01a1000>] ? 0xffffffffa01a1000 Mar 22 22:01:34 Shark kernel: [<ffffffff81057486>] kthread+0xd6/0xde Mar 22 22:01:34 Shark kernel: [<ffffffff810573b0>] ? kthread_create_on_node+0x172/0x172 Mar 22 22:01:34 Shark kernel: [<ffffffff815fd0fc>] ret_from_fork+0x7c/0xb0 Mar 22 22:01:34 Shark kernel: [<ffffffff810573b0>] ? kthread_create_on_node+0x172/0x172
Archived
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