Some version of this is happening about every 3-4 min.  Seems to have only started after i swapped from an Athlon X2 7750 to a Phenom II X4 975

 

Full syslog is attached.

 

Thanks.

 

Dec  6 17:51:25 Tower kernel: INFO: rcu_sched self-detected stall on CPU { 3}  (t=6000 jiffies g=5417 c=5416 q=112)
Dec  6 17:51:25 Tower kernel: Pid: 3055, comm: unraidd Not tainted 3.9.11p-unRAID #4 (Errors)
Dec  6 17:51:25 Tower kernel: Call Trace: (Errors)
Dec  6 17:51:25 Tower kernel:  [<c1062c2a>] print_cpu_stall+0xbc/0x107 (Errors)
Dec  6 17:51:25 Tower kernel:  [<c1062eba>] __rcu_pending+0x4f/0x12a (Errors)
Dec  6 17:51:25 Tower kernel:  [<c1063008>] rcu_check_callbacks+0x73/0x9b (Errors)
Dec  6 17:51:25 Tower kernel:  [<c1032ed9>] update_process_times+0x2d/0x53 (Errors)
Dec  6 17:51:25 Tower kernel:  [<c105520b>] tick_sched_timer+0x77/0xa1 (Errors)
Dec  6 17:51:25 Tower kernel:  [<c1040e02>] ? __remove_hrtimer+0x25/0x7a (Errors)
Dec  6 17:51:25 Tower kernel:  [<c1040f45>] __run_hrtimer+0x45/0xaf (Errors)
Dec  6 17:51:25 Tower kernel:  [<c10412ad>] hrtimer_interrupt+0xf1/0x1e7 (Errors)
Dec  6 17:51:25 Tower kernel:  [<c101c43a>] smp_apic_timer_interrupt+0x6d/0x7f (Errors)
Dec  6 17:51:25 Tower kernel:  [<c1400f99>] apic_timer_interrupt+0x2d/0x34 (Errors)
Dec  6 17:51:25 Tower kernel:  [<c14009f3>] ? _raw_spin_unlock_irqrestore+0x8/0xa (Errors)
Dec  6 17:51:25 Tower kernel:  [<c12484f2>] blk_end_bidi_request+0x4a/0x53 (Errors)
Dec  6 17:51:25 Tower kernel:  [<c124853a>] blk_end_request+0x12/0x14 (Errors)
Dec  6 17:51:25 Tower kernel:  [<c12fc20d>] scsi_end_request+0x1f/0x70 (Errors)
Dec  6 17:51:25 Tower kernel:  [<c12fc578>] scsi_io_completion+0x1b0/0x421 (Errors)
Dec  6 17:51:25 Tower kernel:  [<c12fc311>] ? scsi_device_unbusy+0x7c/0x82 (Errors)
Dec  6 17:51:25 Tower kernel:  [<c12fc311>] ? scsi_device_unbusy+0x7c/0x82 (Errors)
Dec  6 17:51:25 Tower kernel:  [<c12f73ac>] scsi_finish_command+0x91/0x97 (Errors)
Dec  6 17:51:25 Tower kernel:  [<c12fc8bd>] scsi_softirq_done+0xc5/0xcd (Errors)
Dec  6 17:51:25 Tower kernel:  [<c124ccfa>] ? blk_done_softirq+0x4a/0x57 (Errors)
Dec  6 17:51:25 Tower kernel:  [<c124ccfa>] blk_done_softirq+0x4a/0x57 (Errors)
Dec  6 17:51:25 Tower kernel:  [<c102e9cb>] __do_softirq+0x94/0x151 (Errors)
Dec  6 17:51:25 Tower kernel:  [<c102eae8>] irq_exit+0x33/0x6c (Errors)
Dec  6 17:51:25 Tower kernel:  [<c100367e>] do_IRQ+0x87/0x9b (Errors)
Dec  6 17:51:25 Tower kernel:  [<c14018ac>] common_interrupt+0x2c/0x31 (Errors)
Dec  6 17:51:25 Tower kernel:  [<c125e506>] ? memcmp+0x17/0x25 (Errors)
Dec  6 17:51:25 Tower kernel:  [<f856cc1f>] handle_stripe+0xa4d/0xceb [md_mod] (Errors)
Dec  6 17:51:25 Tower kernel:  [<c1044f5f>] ? __wake_up+0x3b/0x42 (Errors)
Dec  6 17:51:25 Tower kernel:  [<f856cf2e>] unraidd+0x71/0xb5 [md_mod] (Errors)
Dec  6 17:51:25 Tower kernel:  [<f8569cb2>] md_thread+0xd3/0xea [md_mod] (Errors)
Dec  6 17:51:25 Tower kernel:  [<c103f031>] ? wake_up_bit+0x5b/0x5b (Errors)
Dec  6 17:51:25 Tower kernel:  [<c103ebf1>] kthread+0x90/0x95 (Errors)
Dec  6 17:51:25 Tower kernel:  [<f8569bdf>] ? import_device+0x166/0x166 [md_mod] (Errors)
Dec  6 17:51:25 Tower kernel:  [<c14013b7>] ret_from_kernel_thread+0x1b/0x28 (Errors)
Dec  6 17:51:25 Tower kernel:  [<c103eb61>] ? kthread_freezable_should_stop+0x4a/0x4a (Errors)

syslog-2013-12-06.zip

Check for a BIOS update.

Check for a BIOS update.

 

I did.  I'm fully up to date.  And this cpu is officially supported

I have seen this, when goosing a Phenom.

 

Try taking the most conservative clocking, or underclocking the CPU.

 

If that doesn't work, try selectively disabling cores.