Debug kernel oops

Debug kernel oops

[Madhu K]

Hi All,

How to debug the kernel oops for arm boards?

Below is my board and setup details.

1) I am using Beaglebone black board which is running with 4.9.2 kernel
version.
2) I wrote some i2c driver on host machine, it is cross compiled for arm
and loaded on beaglebone black.
3) Insmod is proper, but while unloading the module I am seeing some kernel
oops.
4) How to debug that oops? which tools we have to use?

Thanks in advance
Madhu

Debug kernel oops

[Joshua Clayton]

On Monday, February 13, 2017 11:35:43 PM PST Madhu K wrote:
> Hi All,
> 
> How to debug the kernel oops for arm boards?
> 
> Below is my board and setup details.
> 
> 1) I am using Beaglebone black board which is running with 4.9.2 kernel
> version.
> 2) I wrote some i2c driver on host machine, it is cross compiled for arm
> and loaded on beaglebone black.
> 3) Insmod is proper, but while unloading the module I am seeing some kernel
> oops.
> 4) How to debug that oops? which tools we have to use?
> 
dmesg is your first tool.
And the oops itself is your second debugging tool.
There are plenty of resources on how to decode an oops, such as
... (goes and types "kernel oops example" into  a web browser search),
http://opensourceforu.com/2011/01/understanding-a-kernel-oops/

Then add some extra print statements (temporary, for debugging)
to enable you to understand what you are doing wrong.

Good luck. 
> Thanks in advance
> Madhu
> 
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