Hi Valdis,
 
> You might want to read this
 
Thanks for the info it was very interesting to read. My primary intention of getting into the Linux Kernel Development is that I myself used to be a C/Linux developer for years on the user side and pretty well-versed in the Linux user-space API. But the thing is that I have almost zero knowledge of what actually going on under the hood and how to debug and fix complicated problems related to the Kernel itself.  So this is the reason of my interest precisely to core subsystems.
 
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Regards,
Adverg Ebashinskii