It took 16 days for a CPU stall, but captured both of the logs this time. It was the type of crash that causes the entire router to freeze... No Wifi, can't even ping the gateway. If someone wants more of the logs let me know.
From the Kernel Log.
[1139506.644751] INFO: rcu_sched self-detected stall on CPU { 0} (t=6000 jiffies g=7831721 c=7831720 q=309)
[1139506.654430] Task dump for CPU 0:
[1139506.657855] kworker/u4:1 R running 0 32761 2 0x00000002
[1139506.664500] Workqueue: phy1 ieee80211_ba_session_work [mac80211]
[1139506.670722] Backtrace:
[1139506.673387] [<c001ae14>] (dump_backtrace) from [<c001b17c>] (show_stack+0x18/0x1c)
[1139506.681167] r6:c044cfc0 r5:c044d080 r4:ce64f400 r3:00000006
[1139506.687112] [<c001b164>] (show_stack) from [<c0044e64>] (sched_show_task+0xc8/0xfc)
[1139506.694996] [<c0044d9c>] (sched_show_task) from [<c00470fc>] (dump_cpu_task+0x40/0x44)
[1139506.703119] r5:c044d080 r4:00000000
[1139506.706944] [<c00470bc>] (dump_cpu_task) from [<c005f79c>] (rcu_dump_cpu_stacks+0x70/0xb4)
[1139506.715419] r4:00000000 r3:00000001
[1139506.719233] [<c005f72c>] (rcu_dump_cpu_stacks) from [<c0062334>] (rcu_check_callbacks+0x24c/0x668)
[1139506.728406] r9:c044cfc0 r8:c044cfc0 r7:0f99a000 r6:00000135 r5:c043f214 r4:cfdd9214
[1139506.736456] [<c00620e8>] (rcu_check_callbacks) from [<c00643dc>] (update_process_times+0x48/0x68)
[1139506.745543] r10:c046fa70 r9:c046fa70 r8:c046f9f0 r7:00000000 r6:00000000 r5:ce64f400
[1139506.753651] r4:ce634000
[1139506.756412] [<c0064394>] (update_process_times) from [<c007250c>] (tick_sched_timer+0x224/0x268)
[1139506.765411] r7:ce635648 r6:cfdd9570 r5:00040c59 r4:eb87c32c
[1139506.771341] [<c00722e8>] (tick_sched_timer) from [<c0065198>] (__run_hrtimer.isra.35+0xa8/0x144)
[1139506.780339] r10:cfdd9368 r9:00000000 r8:cfdd9378 r7:00000001 r6:cfdd9368 r5:cfdd93a0
[1139506.788460] r4:cfdd9570
[1139506.791206] [<c00650f0>] (__run_hrtimer.isra.35) from [<c0065448>] (hrtimer_interrupt+0x138/0x2ac)
[1139506.800377] r7:00000001 r6:cfdd9368 r5:00040c59 r4:eb87b7ec
[1139506.806320] [<c0065310>] (hrtimer_interrupt) from [<c02653e8>] (armada_370_xp_timer_interrupt+0x4c/0x54)
[1139506.816016] r10:c0487d58 r9:000003ff r8:cfddcc40 r7:00000010 r6:cf80aa00 r5:c04514f8
[1139506.824125] r4:cfddcc40
[1139506.826885] [<c026539c>] (armada_370_xp_timer_interrupt) from [<c005be34>] (handle_percpu_devid_irq+0x74/0x8c)
[1139506.837103] r4:cf803c40 r3:c026539c
[1139506.840919] [<c005bdc0>] (handle_percpu_devid_irq) from [<c005821c>] (generic_handle_irq+0x34/0x44)
[1139506.850179] r8:cf805000 r7:00000001 r6:ce635d78 r5:00000000 r4:00000010 r3:c005bdc0
[1139506.858230] [<c00581e8>] (generic_handle_irq) from [<c0058524>] (__handle_domain_irq+0x90/0xa4)
[1139506.867143] r4:c043f8f8 r3:0000005e
[1139506.870955] [<c0058494>] (__handle_domain_irq) from [<c0008698>] (armada_370_xp_handle_irq+0x64/0xe0)
[1139506.880388] r8:ce635648 r7:00000001 r6:c0487d6c r5:20000153 r4:c0011e14 r3:ce635648
[1139506.888437] [<c0008634>] (armada_370_xp_handle_irq) from [<c00097a0>] (__irq_svc+0x40/0x54)
This was from the system log.
Wed Sep 2 21:51:22 2015 kern.err kernel: [1139506.644751] INFO: rcu_sched self-detected stall on CPU { 0} (t=6000 jiffies g=7831721 c=7831720 q=309)
Wed Sep 2 21:51:22 2015 kern.info kernel: [1139506.654430] Task dump for CPU 0:
Wed Sep 2 21:51:22 2015 kern.info kernel: [1139506.657855] kworker/u4:1 R running 0 32761 2 0x00000002
Wed Sep 2 21:51:22 2015 kern.info kernel: [1139506.664500] Workqueue: phy1 ieee80211_ba_session_work [mac80211]
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.670722] Backtrace:
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.673387] [<c001ae14>] (dump_backtrace) from [<c001b17c>] (show_stack+0x18/0x1c)
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.681167] r6:c044cfc0 r5:c044d080 r4:ce64f400 r3:00000006
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.687112] [<c001b164>] (show_stack) from [<c0044e64>] (sched_show_task+0xc8/0xfc)
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.694996] [<c0044d9c>] (sched_show_task) from [<c00470fc>] (dump_cpu_task+0x40/0x44)
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.703119] r5:c044d080 r4:00000000
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.706944] [<c00470bc>] (dump_cpu_task) from [<c005f79c>] (rcu_dump_cpu_stacks+0x70/0xb4)
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.715419] r4:00000000 r3:00000001
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.719233] [<c005f72c>] (rcu_dump_cpu_stacks) from [<c0062334>] (rcu_check_callbacks+0x24c/0x668)
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.728406] r9:c044cfc0 r8:c044cfc0 r7:0f99a000 r6:00000135 r5:c043f214 r4:cfdd9214
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.736456] [<c00620e8>] (rcu_check_callbacks) from [<c00643dc>] (update_process_times+0x48/0x68)
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.745543] r10:c046fa70 r9:c046fa70 r8:c046f9f0 r7:00000000 r6:00000000 r5:ce64f400
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.753651] r4:ce634000
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.756412] [<c0064394>] (update_process_times) from [<c007250c>] (tick_sched_timer+0x224/0x268)
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.765411] r7:ce635648 r6:cfdd9570 r5:00040c59 r4:eb87c32c
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.771341] [<c00722e8>] (tick_sched_timer) from [<c0065198>] (__run_hrtimer.isra.35+0xa8/0x144)
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.780339] r10:cfdd9368 r9:00000000 r8:cfdd9378 r7:00000001 r6:cfdd9368 r5:cfdd93a0
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.788460] r4:cfdd9570
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.791206] [<c00650f0>] (__run_hrtimer.isra.35) from [<c0065448>] (hrtimer_interrupt+0x138/0x2ac)
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.800377] r7:00000001 r6:cfdd9368 r5:00040c59 r4:eb87b7ec
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.806320] [<c0065310>] (hrtimer_interrupt) from [<c02653e8>] (armada_370_xp_timer_interrupt+0x4c/0x54)
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.816016] r10:c0487d58 r9:000003ff r8:cfddcc40 r7:00000010 r6:cf80aa00 r5:c04514f8
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.824125] r4:cfddcc40
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.826885] [<c026539c>] (armada_370_xp_timer_interrupt) from [<c005be34>] (handle_percpu_devid_irq+0x74/0x8c)
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.837103] r4:cf803c40 r3:c026539c
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.840919] [<c005bdc0>] (handle_percpu_devid_irq) from [<c005821c>] (generic_handle_irq+0x34/0x44)
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.850179] r8:cf805000 r7:00000001 r6:ce635d78 r5:00000000 r4:00000010 r3:c005bdc0
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.858230] [<c00581e8>] (generic_handle_irq) from [<c0058524>] (__handle_domain_irq+0x90/0xa4)
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.867143] r4:c043f8f8 r3:0000005e
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.870955] [<c0058494>] (__handle_domain_irq) from [<c0008698>] (armada_370_xp_handle_irq+0x64/0xe0)
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.880388] r8:ce635648 r7:00000001 r6:c0487d6c r5:20000153 r4:c0011e14 r3:ce635648
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.888437] [<c0008634>] (armada_370_xp_handle_irq) from [<c00097a0>] (__irq_svc+0x40/0x54)
Wed Sep 2 21:51:22 2015 kern.warn kernel: [1139506.897002] Exception stack(0xce635648 to 0xce635690)
(Last edited by davidc502 on 3 Sep 2015, 04:18)