Hi Notaz,
I am trying to bring up and test the new CPU boards and came across this log message:
[ 857.205142] INFO: rcu_sched self-detected stall on CPU
[ 857.210537] 0-...: (80382 ticks this GP) idle=9b5/140000000000001/0 softirq=2813/2816 fqs=80324
[ 857.215154] INFO: rcu_sched detected stalls on CPUs/tasks:
[ 857.215164] 0-...: (80382 ticks this GP) idle=9b5/140000000000001/0 softirq=2813/2816 fqs=80324
[ 857.215172] (detected by 1, t=80652 jiffies, g=117, c=116, q=4927)
[ 857.215177] Task dump for CPU 0:
[ 857.215187] irq/300-4807a00 R running 0 782 2 0x00000002
[ 857.215197] [<c05c0600>] (__schedule) from [<ee41ea00>] (0xee41ea00)
[ 857.258091] (t=80656 jiffies g=117 c=116 q=4927)
[ 857.263111] Task dump for CPU 0:
[ 857.266489] irq/300-4807a00 R running 0 782 2 0x00000002
[ 857.273159] [<c0016290>] (unwind_backtrace) from [<c0012bc8>] (show_stack+0x10/0x14)
[ 857.281273] [<c0012bc8>] (show_stack) from [<c0098370>] (rcu_dump_cpu_stacks+0x58/0x98)
[ 857.289654] [<c0098370>] (rcu_dump_cpu_stacks) from [<c0098470>] (print_cpu_stall+0xc0/0x140)
[ 857.298575] [<c0098470>] (print_cpu_stall) from [<c0099004>] (__rcu_pending+0x20/0x18c)
[ 857.306957] [<c0099004>] (__rcu_pending) from [<c009bad8>] (rcu_check_callbacks+0x13c/0x1e0)
[ 857.315797] [<c009bad8>] (rcu_check_callbacks) from [<c00a0568>] (update_process_times+0x30/0x5c)
[ 857.325089] [<c00a0568>] (update_process_times) from [<c00b002c>] (tick_sched_handle+0x48/0x54)
[ 857.334204] [<c00b002c>] (tick_sched_handle) from [<c00b0138>] (tick_sched_timer+0x58/0x9c)
[ 857.342947] [<c00b0138>] (tick_sched_timer) from [<c00a1050>] (__run_hrtimer+0x164/0x264)
[ 857.351528] [<c00a1050>] (__run_hrtimer) from [<c00a11c0>] (__hrtimer_run_queues+0x70/0x94)
[ 857.360268] [<c00a11c0>] (__hrtimer_run_queues) from [<c00a18c4>] (hrtimer_interrupt+0xe4/0x248)
[ 857.369468] [<c00a18c4>] (hrtimer_interrupt) from [<c0492b4c>] (arch_timer_handler_virt+0x2c/0x34)
[ 857.378851] [<c0492b4c>] (arch_timer_handler_virt) from [<c0092740>] (handle_percpu_devid_irq+0xd8/0x160)
[ 857.388871] [<c0092740>] (handle_percpu_devid_irq) from [<c008ea64>] (generic_handle_irq+0x18/0x28)
[ 857.398348] [<c008ea64>] (generic_handle_irq) from [<c008eb9c>] (__handle_domain_irq+0x94/0xd8)
[ 857.407458] [<c008eb9c>] (__handle_domain_irq) from [<c00094e0>] (gic_handle_irq+0x50/0x88)
[ 857.416218] [<c00094e0>] (gic_handle_irq) from [<c05c58f8>] (__irq_svc+0x58/0x78)
[ 857.424051] Exception stack(0xee333e80 to 0xee333ec8)
[ 857.429341] 3e80: 00000001 00000004 00000000 ee646340 ee2ce760 ee2ce760 ee41ea00 ee2ce710
[ 857.437910] 3ea0: 00000000 00000000 c09534ee 00000001 00000001 ee333ed0 c008560c c05c53e4
[ 857.446466] 3ec0: 20010013 ffffffff
[ 857.450129] [<c05c58f8>] (__irq_svc) from [<c05c53e4>] (_raw_spin_unlock_irq+0x28/0x2c)
[ 857.458512] [<c05c53e4>] (_raw_spin_unlock_irq) from [<c0090370>] (irq_finalize_oneshot.part.3+0xb8/0xd4)
[ 857.468533] [<c0090370>] (irq_finalize_oneshot.part.3) from [<c0090490>] (irq_thread_fn+0x2c/0x34)
[ 857.477922] [<c0090490>] (irq_thread_fn) from [<c0090160>] (irq_thread+0x98/0x1f0)
[ 857.485857] [<c0090160>] (irq_thread) from [<c00590fc>] (kthread+0xd4/0xe8)
[ 857.493147] [<c00590fc>] (kthread) from [<c000efd0>] (ret_from_fork+0x14/0x24)
It looks like it is related to irq/300-4807a00 which would be the I2C4 module (assuming that there is a missing 0 at the end of 4807a00).
What else could I read from that?
BR,
Nikolaus