Android Nougat Kernel stalls

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Android Nougat Kernel stalls

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Contributor V

Hello,

I am porting the Android Nougat on imx6d processor. I am getting the errors as follow on kernel terminal output, 

INFO: rcu_preempt detected stalls on CPUs/tasks:
0-...: (4 GPs behind) idle=f93/2/0 softirq=146248/146249 fqs=51465
(detected by 1, t=102982 jiffies, g=50694, c=50693, q=861)
Task dump for CPU 0:
swapper/0 R running task 0 0 0 0x00000002
[<c0c5e078>] (__schedule) from [<c1300000>] (init_thread_union+0x0/0x2000)

and  the device is stuck. 

Is it a kind of known issue, for which there is any patch to be picked up ?

Thanks,

Taehyuk

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3 Replies

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Contributor V

Hi Igor,

I am using the same version. I have run the memory testing, resulting no errors. 

The kernel was picked up around Oct. last year, 2018. Do you have any patch i can try ?

Thanks and Regards,

Taehyuk

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NXP TechSupport
NXP TechSupport

Hi Taehyuk

could you try to reproduce issue on NXP Sabre reference board.

Best regards
igor

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NXP TechSupport
NXP TechSupport

Hi Taehyuk

one can try latest Nougat N7.1.2_2.0.0, L4.9 kernel, rebuild all from scratch.

https://www.nxp.com/webapp/Download?colCode=IMX_N7.1.2_2.0.0_ANDROID_SOURCE_BSP&appType=license&loca... 

Also may be useful to check memory:

https://community.nxp.com/docs/DOC-105652 

Best regards
igor
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