Tool/software: Linux
Hello
my SDK is SDK04.00.00.04, linux version is 4.9.28.
my system sometimes got this message as following:
[ 1900.380254] INFO: rcu_preempt self-detected stall on CPU
[ 1900.385887] 0-...: (2 ticks this GP) idle=2db/1/0 softirq=58034/58034 fqs=0
[ 1900.393370] (t=17896 jiffies g=40285 c=40284 q=1)
[ 1900.398499] rcu_preempt kthread starved for 17896 jiffies! g40285 c40284 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x1
[ 1900.408802] rcu_preempt S 0 7 2 0x00000000
[ 1900.414561] Backtrace:
[ 1900.417163] [<c07c4a64>] (__schedule) from [<c07c508c>] (schedule+0x54/0xb8)
[ 1900.424564] r10:c0c13d80 r9:c0c12c80 r8:00000000 r7:c0c13d80 r6:cf06fed8 r5:00027126
[ 1900.432770] r4:cf06e000
[ 1900.435439] [<c07c5038>] (schedule) from [<c07c82e8>] (schedule_timeout+0x17c/0x224)
[ 1900.443559] r5:00027126 r4:c0c12c80
[ 1900.447318] [<c07c816c>] (schedule_timeout) from [<c0175bd4>] (rcu_gp_kthread+0x690/0x99c)
[ 1900.455988] r9:00000001 r8:c0c125a8 r7:c0c124d0 r6:00000003 r5:cf06e000 r4:c0c124d0
[ 1900.464125] [<c0175544>] (rcu_gp_kthread) from [<c0147e18>] (kthread+0xf8/0x110)
[ 1900.471878] r7:c0c124d0
[ 1900.474551] [<c0147d20>] (kthread) from [<c0107d38>] (ret_from_fork+0x14/0x3c)
[ 1900.482126] r8:00000000 r7:00000000 r6:00000000 r5:c0147d20 r4:cf01f7c0
[ 1900.489155] Task dump for CPU 0:
[ 1900.492536] swapper R running task 0 0 0 0x00000002
[ 1900.499934] Backtrace:
[ 1900.502517] [<c010b790>] (dump_backtrace) from [<c010ba4c>] (show_stack+0x18/0x1c)
[ 1900.510457] r7:c0c02900 r6:00000000 r5:00000000 r4:c0c05580
[ 1900.516400] [<c010ba34>] (show_stack) from [<c015133c>] (sched_show_task+0xb8/0x108)
[ 1900.524524] [<c0151284>] (sched_show_task) from [<c015235c>] (dump_cpu_task+0x2c/0x30)
[ 1900.532823] r5:c0c00000 r4:c0c124d0
[ 1900.536590] [<c0152330>] (dump_cpu_task) from [<c01b6620>] (rcu_dump_cpu_stacks+0xb4/0xd8)
[ 1900.545261] [<c01b656c>] (rcu_dump_cpu_stacks) from [<c01767b4>] (rcu_check_callbacks+0x4fc/0x970)
[ 1900.554659] r10:c0c02900 r9:c0c028f8 r8:c0c13d80 r7:00000000 r6:c0c12968 r5:c0c124d0
[ 1900.562865] r4:c0c129b4 r3:c0c00000
[ 1900.566623] [<c01762b8>] (rcu_check_callbacks) from [<c017a068>] (update_process_times+0x3c/0x64)
[ 1900.575928] r10:c0c13e4c r9:c018a284 r8:00000000 r7:000001e4 r6:00000000 r5:c0c05580
[ 1900.584135] r4:ffffe000
[ 1900.586809] [<c017a02c>] (update_process_times) from [<c018a280>] (tick_sched_handle+0x50/0x54)
[ 1900.595931] r7:000001e4 r6:2224823f r5:c0c01ed0 r4:c0c144c0
[ 1900.601870] [<c018a230>] (tick_sched_handle) from [<c018a2e8>] (tick_sched_timer+0x64/0xb8)
[ 1900.610633] [<c018a284>] (tick_sched_timer) from [<c017ada8>] (__hrtimer_run_queues.constprop.4+0x150/0x1e0)
[ 1900.620938] r7:c0c13e40 r6:c0c00000 r5:c0c144c0 r4:c0c13e00
[ 1900.626878] [<c017ac58>] (__hrtimer_run_queues.constprop.4) from [<c017b068>] (hrtimer_interrupt+0xb4/0x250)
[ 1900.637184] r10:c0c13eb8 r9:c0c01d80 r8:ffffffff r7:7fffffff r6:00000002 r5:c0c00000
[ 1900.645388] r4:c0c13e00
[ 1900.648064] [<c017afb4>] (hrtimer_interrupt) from [<c0119ab8>] (omap2_gp_timer_interrupt+0x30/0x38)
[ 1900.657551] r10:c0c15c48 r9:cf019000 r8:00000010 r7:c0c01e34 r6:00000000 r5:cf019000
[ 1900.665755] r4:c0c07674
[ 1900.668431] [<c0119a88>] (omap2_gp_timer_interrupt) from [<c0168770>] (__handle_irq_event_percpu+0xb4/0x144)
[ 1900.678743] [<c01686bc>] (__handle_irq_event_percpu) from [<c0168824>] (handle_irq_event_percpu+0x24/0x60)
[ 1900.688871] r10:00000000 r9:c0c00000 r8:cf006000 r7:00000000 r6:00000000 r5:cf019000
[ 1900.697076] r4:cf019000
[ 1900.699739] [<c0168800>] (handle_irq_event_percpu) from [<c01688c4>] (handle_irq_event+0x64/0x90)
[ 1900.709037] r5:cf019010 r4:cf019000
[ 1900.712793] [<c0168860>] (handle_irq_event) from [<c016ba04>] (handle_level_irq+0xb8/0x164)
[ 1900.721544] r5:cf019010 r4:cf019000
[ 1900.725296] [<c016b94c>] (handle_level_irq) from [<c0167958>] (generic_handle_irq+0x2c/0x3c)
[ 1900.734138] r5:00000010 r4:c0c1d7ec
[ 1900.737893] [<c016792c>] (generic_handle_irq) from [<c0168014>] (__handle_domain_irq+0x5c/0xb0)
[ 1900.747017] [<c0167fb8>] (__handle_domain_irq) from [<c0101484>] (omap_intc_handle_irq+0x3c/0x98)
[ 1900.756323] r9:c0c00000 r8:0097cd54 r7:c0c01f04 r6:ffffffff r5:20000013 r4:c0c745f0
[ 1900.764443] [<c0101448>] (omap_intc_handle_irq) from [<c010c54c>] (__irq_svc+0x6c/0xa8)
[ 1900.772832] Exception stack(0xc0c01ed0 to 0xc0c01f18)
[ 1900.778130] 1ec0: 00000000 000001ba f779933d c0c0f2d8
[ 1900.786710] 1ee0: 76e3d342 000001ba 00000000 cf4d6000 0097cd54 000001ba 00000000 c0c01f54
[ 1900.795284] 1f00: c0c01f20 c0c01f20 c060f390 c060f398 20000013 ffffffff
[ 1900.802217] r5:20000013 r4:c060f398
[ 1900.805977] [<c060f20c>] (cpuidle_enter_state) from [<c060f510>] (cpuidle_enter+0x1c/0x20)
[ 1900.814646] r10:c0c15c45 r9:c0c028d0 r8:c0c36358 r7:c0c028c8 r6:c0c36798 r5:c0c00000
[ 1900.822854] r4:cf4d6000
[ 1900.825526] [<c060f4f4>] (cpuidle_enter) from [<c0159400>] (call_cpuidle+0x28/0x40)
[ 1900.833561] [<c01593d8>] (call_cpuidle) from [<c0159628>] (cpu_startup_entry+0xe8/0x198)
[ 1900.842050] [<c0159540>] (cpu_startup_entry) from [<c07c403c>] (rest_init+0x8c/0x90)
[ 1900.850166] r7:c0c02840
[ 1900.852836] [<c07c3fb0>] (rest_init) from [<c0b00d44>] (start_kernel+0x3a8/0x3b4)
[ 1900.860679] r5:c0c42140 r4:c0c4218c
[ 1900.864435] [<c0b0099c>] (start_kernel) from [<80008078>] (0x80008078)
there is a simple thread:
but I can't understand the solution, could anyone tell me how to deal this issue? Is there any patch can use?
