System reboot caused by RCU warning

Wizard_Richard — Mon, 31 Oct 2016 06:07:40 GMT

My custom imx6q board always reboot when running a long time LTP test.

hardware: imx6q with 1GHz,1G ddr3

kernel: Linux 3.0.35_4.1.0

After running a long time LTP test, such as 4 hours, the system always reboot caused by RCU warning.

I have no idea what caused the problem, kernel bug or ddr parameter?

By the way, the ddr3 parameter is calibrated with ddr_stress_tester by ourselves.

Does any one can help me?

Thanks!

[189627.422520] ------------[ cut here ]------------
[189627.427279] WARNING: at kernel/rcutree_plugin.h:180 rcu_note_context_switch+0x19c/0x1f0()
[189627.435546] Modules linked in:
[189627.438733] [<c00464ac>] (unwind_backtrace+0x0/0x138) from [<c007d634>] (warn_slowpath_common+0x4c/0x64)
[189627.448311] [<c007d634>] (warn_slowpath_common+0x4c/0x64) from [<c007d668>] (warn_slowpath_null+0x1c/0x24)
[189627.458061] [<c007d668>] (warn_slowpath_null+0x1c/0x24) from [<c00c5bd8>] (rcu_note_context_switch+0x19c/0x1f0)
[189627.468261] [<c00c5bd8>] (rcu_note_context_switch+0x19c/0x1f0) from [<c04f6574>] (__schedule+0x64/0x940)
[189627.477841] [<c04f6574>] (__schedule+0x64/0x940) from [<c04f6f34>] (preempt_schedule+0x3c/0x58)
[189627.486640] [<c04f6f34>] (preempt_schedule+0x3c/0x58) from [<c0209428>] (do_msgrcv+0x1ac/0x388)
[189627.495435] [<c0209428>] (do_msgrcv+0x1ac/0x388) from [<c0209630>] (sys_msgrcv+0x2c/0x54)
[189627.503722] [<c0209630>] (sys_msgrcv+0x2c/0x54) from [<c003f880>] (ret_fast_syscall+0x0/0x30)
[189627.512339] ---[ end trace 5e09246341fe919e ]---
[189681.037049] init: untracked pid 5827 exited
[189687.896645] P4231 P4231 P4231 P4231

Re: System reboot caused by RCU warning

igorpadykov — Mon, 31 Oct 2016 09:39:35 GMT

Hi Richard

please check (in particular Peter Chan patches)

https://community.freescale.com/thread/333368

shortly, recommended to implement all latest arm/gpu errata fixes

provided in latest BSP L4.1.15, like ARM-errata-7613, e.t.c.

i.MX 6 Series Software and Development Tool|NXP

Best regards
igor
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System reboot caused by RCU warning

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