Unraid becoming unresponsive CPU Stall


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Unraid around 1-3 times a week at apparently random times is stopping and becoming unresponsive, the syslog shows this before it stops until I pull the power and restart. I restarted it the next day. Does anyone have any ideas, help would be gratefully appreciated. 

 

Excerpt from the syslog, full log for the day attached:

Nov  2 20:16:13 Hydra kernel: rcu: INFO: rcu_sched self-detected stall on CPU
Nov  2 20:16:13 Hydra kernel: rcu: #01110-....: (59998 ticks this GP) idle=6ea/1/0x4000000000000002 softirq=203068959/203068959 fqs=14300 
Nov  2 20:16:13 Hydra kernel: rcu: #011 (t=60001 jiffies g=284290801 q=1671571)
Nov  2 20:16:13 Hydra kernel: NMI backtrace for cpu 10
Nov  2 20:16:13 Hydra kernel: CPU: 10 PID: 435 Comm: smbd Tainted: G        W  O      4.19.107-Unraid #1
Nov  2 20:16:13 Hydra kernel: Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./X470D4U, BIOS P3.30 11/04/2019
Nov  2 20:16:13 Hydra kernel: Call Trace:
Nov  2 20:16:13 Hydra kernel: <IRQ>
Nov  2 20:16:13 Hydra kernel: dump_stack+0x67/0x83
Nov  2 20:16:13 Hydra kernel: nmi_cpu_backtrace+0x71/0x83
Nov  2 20:16:13 Hydra kernel: ? lapic_can_unplug_cpu+0x97/0x97
Nov  2 20:16:13 Hydra kernel: nmi_trigger_cpumask_backtrace+0x57/0xd4
Nov  2 20:16:13 Hydra kernel: rcu_dump_cpu_stacks+0x8b/0xb4
Nov  2 20:16:13 Hydra kernel: rcu_check_callbacks+0x296/0x5a0
Nov  2 20:16:13 Hydra kernel: update_process_times+0x24/0x47
Nov  2 20:16:13 Hydra kernel: tick_sched_timer+0x36/0x64
Nov  2 20:16:13 Hydra kernel: __hrtimer_run_queues+0xb7/0x10b
Nov  2 20:16:13 Hydra kernel: ? tick_sched_handle.isra.0+0x2f/0x2f
Nov  2 20:16:13 Hydra kernel: hrtimer_interrupt+0xf4/0x20e
Nov  2 20:16:13 Hydra kernel: smp_apic_timer_interrupt+0x7b/0x93
Nov  2 20:16:13 Hydra kernel: apic_timer_interrupt+0xf/0x20
Nov  2 20:16:13 Hydra kernel: </IRQ>

Nov  2 21:58:13 Hydra kernel: rcu: INFO: rcu_sched self-detected stall on CPU
Nov  2 21:58:13 Hydra kernel: rcu: #01110-....: (6180101 ticks this GP) idle=6ea/1/0x4000000000000002 softirq=203068959/203068959 fqs=1502221 
Nov  2 21:58:13 Hydra kernel: rcu: #011 (t=6180104 jiffies g=284290801 q=40981941)
Nov  2 21:58:13 Hydra kernel: NMI backtrace for cpu 10
Nov  2 21:58:13 Hydra kernel: CPU: 10 PID: 435 Comm: smbd Tainted: G        W  O      4.19.107-Unraid #1
Nov  2 21:58:13 Hydra kernel: Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./X470D4U, BIOS P3.30 11/04/2019
Nov  2 21:58:13 Hydra kernel: Call Trace:
Nov  2 21:58:13 Hydra kernel: <IRQ>
Nov  2 21:58:13 Hydra kernel: dump_stack+0x67/0x83
Nov  2 21:58:13 Hydra kernel: nmi_cpu_backtrace+0x71/0x83
Nov  2 21:58:13 Hydra kernel: ? lapic_can_unplug_cpu+0x97/0x97
Nov  2 21:58:13 Hydra kernel: nmi_trigger_cpumask_backtrace+0x57/0xd4
Nov  2 21:58:13 Hydra kernel: rcu_dump_cpu_stacks+0x8b/0xb4
Nov  2 21:58:13 Hydra kernel: rcu_check_callbacks+0x296/0x5a0
Nov  2 21:58:13 Hydra kernel: update_process_times+0x24/0x47
Nov  2 21:58:13 Hydra kernel: tick_sched_timer+0x36/0x64
Nov  2 21:58:13 Hydra kernel: __hrtimer_run_queues+0xb7/0x10b
Nov  2 21:58:13 Hydra kernel: ? tick_sched_handle.isra.0+0x2f/0x2f
Nov  2 21:58:13 Hydra kernel: hrtimer_interrupt+0xf4/0x20e
Nov  2 21:58:13 Hydra kernel: smp_apic_timer_interrupt+0x7b/0x93
Nov  2 21:58:13 Hydra kernel: apic_timer_interrupt+0xf/0x20
Nov  2 21:58:13 Hydra kernel: </IRQ>
Nov  2 21:58:13 Hydra kernel: RIP: 0010:radix_tree_descend+0x16/0x57
Nov  2 21:58:13 Hydra kernel: Code: 48 8b 42 08 4c 89 4a 08 48 89 57 18 48 89 47 20 4c 89 08 c3 0f b6 0f 48 89 d0 48 d3 e8 83 e0 3f 89 c2 48 8d 54 d7 28 48 8b 12 <48> 89 d1 83 e1 03 48 ff c9 75 32 48 8d 4f 28 48 39 ca 72 29 4c 8d
Nov  2 21:58:13 Hydra kernel: RSP: 0018:ffffc9000c657c70 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13
Nov  2 21:58:13 Hydra kernel: RAX: 000000000000001f RBX: 000000000001f518 RCX: 000000000000000c
Nov  2 21:58:13 Hydra kernel: RDX: ffff888106090001 RSI: ffffc9000c657c78 RDI: ffff888102ff8db0
Nov  2 21:58:13 Hydra kernel: RBP: ffff888151151078 R08: ffff888151151078 R09: ffffc9000c657ca8
Nov  2 21:58:13 Hydra kernel: R10: 0000000000000000 R11: ffff888151151070 R12: 00000000006200ca
Nov  2 21:58:13 Hydra kernel: R13: ffff888151151068 R14: 0000000000001000 R15: 000000000001f518
Nov  2 21:58:13 Hydra kernel: __radix_tree_lookup+0x69/0xa2
Nov  2 21:58:13 Hydra kernel: radix_tree_lookup_slot+0x1e/0x41
Nov  2 21:58:13 Hydra kernel: find_get_entry+0x14/0x8f
Nov  2 21:58:13 Hydra kernel: pagecache_get_page+0x20/0x1bd
Nov  2 21:58:13 Hydra kernel: grab_cache_page_write_begin+0x1a/0x31
Nov  2 21:58:13 Hydra kernel: fuse_perform_write+0x178/0x43a
Nov  2 21:58:13 Hydra kernel: ? file_remove_privs+0x55/0xb9
Nov  2 21:58:13 Hydra kernel: fuse_file_write_iter+0x1b6/0x22f
Nov  2 21:58:13 Hydra kernel: __vfs_write+0xfc/0x13a
Nov  2 21:58:13 Hydra kernel: vfs_write+0xc7/0x166
Nov  2 21:58:13 Hydra kernel: ksys_pwrite64+0x5d/0x79
Nov  2 21:58:13 Hydra kernel: do_syscall_64+0x57/0xf2
Nov  2 21:58:13 Hydra kernel: entry_SYSCALL_64_after_hwframe+0x44/0xa9
Nov  2 21:58:13 Hydra kernel: RIP: 0033:0x14d2885a3ed7
Nov  2 21:58:13 Hydra kernel: Code: 08 89 3c 24 48 89 4c 24 18 e8 05 f3 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 48 8b 74 24 08 8b 3c 24 b8 12 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 2d 44 89 c7 48 89 04 24 e8 35 f3 ff ff 48 8b
Nov  2 21:58:13 Hydra kernel: RSP: 002b:000014d2867e8bf0 EFLAGS: 00000293 ORIG_RAX: 0000000000000012
Nov  2 21:58:13 Hydra kernel: RAX: ffffffffffffffda RBX: 000055f7b41e7890 RCX: 000014d2885a3ed7
Nov  2 21:58:13 Hydra kernel: RDX: 0000000000100000 RSI: 000055f7b4631850 RDI: 000000000000001f
Nov  2 21:58:13 Hydra kernel: RBP: 000055f7b3e7fff0 R08: 0000000000000000 R09: 00000000ffffffff
Nov  2 21:58:13 Hydra kernel: R10: 000000001f500000 R11: 0000000000000293 R12: 000014d2867e8c70
Nov  2 21:58:13 Hydra kernel: R13: 000055f7b3e80028 R14: 000055f7b3efaf50 R15: 000014d289f850a0
Nov  2 21:58:42 Hydra kernel: rcu: INFO: rcu_bh self-detected stall on CPU
Nov  2 21:58:42 Hydra kernel: rcu: #01110-....: (6222689 ticks this GP) idle=6ea/1/0x4000000000000002 softirq=203061910/203068959 fqs=1457949 
Nov  2 21:58:42 Hydra kernel: rcu: #011 (t=6000105 jiffies g=19189 q=8)
Nov  2 21:58:42 Hydra kernel: NMI backtrace for cpu 10
Nov  2 21:58:42 Hydra kernel: CPU: 10 PID: 435 Comm: smbd Tainted: G        W  O      4.19.107-Unraid #1
Nov  2 21:58:42 Hydra kernel: Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./X470D4U, BIOS P3.30 11/04/2019
Nov  2 21:58:42 Hydra kernel: Call Trace:
Nov  2 21:58:42 Hydra kernel: <IRQ>
Nov  2 21:58:42 Hydra kernel: dump_stack+0x67/0x83
Nov  2 21:58:42 Hydra kernel: nmi_cpu_backtrace+0x71/0x83
Nov  2 21:58:42 Hydra kernel: ? lapic_can_unplug_cpu+0x97/0x97
Nov  2 21:58:42 Hydra kernel: nmi_trigger_cpumask_backtrace+0x57/0xd4
Nov  2 21:58:42 Hydra kernel: rcu_dump_cpu_stacks+0x8b/0xb4
Nov  2 21:58:42 Hydra kernel: rcu_check_callbacks+0x296/0x5a0
Nov  2 21:58:42 Hydra kernel: update_process_times+0x24/0x47
Nov  2 21:58:42 Hydra kernel: tick_sched_timer+0x36/0x64
Nov  2 21:58:42 Hydra kernel: __hrtimer_run_queues+0xb7/0x10b
Nov  2 21:58:42 Hydra kernel: ? tick_sched_handle.isra.0+0x2f/0x2f
Nov  2 21:58:42 Hydra kernel: hrtimer_interrupt+0xf4/0x20e
Nov  2 21:58:42 Hydra kernel: smp_apic_timer_interrupt+0x7b/0x93
Nov  2 21:58:42 Hydra kernel: apic_timer_interrupt+0xf/0x20
Nov  2 21:58:42 Hydra kernel: </IRQ>
Nov  2 21:58:42 Hydra kernel: RIP: 0010:radix_tree_descend+0x13/0x57
Nov  2 21:58:42 Hydra kernel: Code: 4c 89 c2 48 8b 42 08 4c 89 4a 08 48 89 57 18 48 89 47 20 4c 89 08 c3 0f b6 0f 48 89 d0 48 d3 e8 83 e0 3f 89 c2 48 8d 54 d7 28 <48> 8b 12 48 89 d1 83 e1 03 48 ff c9 75 32 48 8d 4f 28 48 39 ca 72
Nov  2 21:58:42 Hydra kernel: RSP: 0018:ffffc9000c657c70 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13
Nov  2 21:58:42 Hydra kernel: RAX: 0000000000000014 RBX: 000000000001f518 RCX: 0000000000000006
Nov  2 21:58:42 Hydra kernel: RDX: ffff8881060900c8 RSI: ffffc9000c657c78 RDI: ffff888106090000
Nov  2 21:58:42 Hydra kernel: RBP: ffff888151151078 R08: ffff888102ff8ed0 R09: ffffc9000c657ca8
Nov  2 21:58:42 Hydra kernel: R10: 0000000000000000 R11: ffff888151151070 R12: 00000000006200ca
Nov  2 21:58:42 Hydra kernel: R13: ffff888151151068 R14: 0000000000001000 R15: 000000000001f518
Nov  2 21:58:42 Hydra kernel: __radix_tree_lookup+0x69/0xa2
Nov  2 21:58:42 Hydra kernel: radix_tree_lookup_slot+0x1e/0x41
Nov  2 21:58:42 Hydra kernel: find_get_entry+0x14/0x8f
Nov  2 21:58:42 Hydra kernel: pagecache_get_page+0x20/0x1bd
Nov  2 21:58:42 Hydra kernel: grab_cache_page_write_begin+0x1a/0x31
Nov  2 21:58:42 Hydra kernel: fuse_perform_write+0x178/0x43a
Nov  2 21:58:42 Hydra kernel: ? file_remove_privs+0x55/0xb9
Nov  2 21:58:42 Hydra kernel: fuse_file_write_iter+0x1b6/0x22f
Nov  2 21:58:42 Hydra kernel: __vfs_write+0xfc/0x13a
Nov  2 21:58:42 Hydra kernel: vfs_write+0xc7/0x166
Nov  2 21:58:42 Hydra kernel: ksys_pwrite64+0x5d/0x79
Nov  2 21:58:42 Hydra kernel: do_syscall_64+0x57/0xf2
Nov  2 21:58:42 Hydra kernel: entry_SYSCALL_64_after_hwframe+0x44/0xa9
Nov  2 21:58:42 Hydra kernel: RIP: 0033:0x14d2885a3ed7
Nov  2 21:58:42 Hydra kernel: Code: 08 89 3c 24 48 89 4c 24 18 e8 05 f3 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 48 8b 74 24 08 8b 3c 24 b8 12 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 2d 44 89 c7 48 89 04 24 e8 35 f3 ff ff 48 8b
Nov  2 21:58:42 Hydra kernel: RSP: 002b:000014d2867e8bf0 EFLAGS: 00000293 ORIG_RAX: 0000000000000012
Nov  2 21:58:42 Hydra kernel: RAX: ffffffffffffffda RBX: 000055f7b41e7890 RCX: 000014d2885a3ed7
Nov  2 21:58:42 Hydra kernel: RDX: 0000000000100000 RSI: 000055f7b4631850 RDI: 000000000000001f
Nov  2 21:58:42 Hydra kernel: RBP: 000055f7b3e7fff0 R08: 0000000000000000 R09: 00000000ffffffff
Nov  2 21:58:42 Hydra kernel: R10: 000000001f500000 R11: 0000000000000293 R12: 000014d2867e8c70
Nov  2 21:58:42 Hydra kernel: R13: 000055f7b3e80028 R14: 000055f7b3efaf50 R15: 000014d289f850a0

hydra-diagnostics-20201103-1033.zip syslog 2 nov 2020.log

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