since many things are time depending in the kernel it is difficult to stop parts of the kernel. The question is if it is really absolutely necessary to do this? Why you can not do it by logging with printk?

Debugging is described in: https://www.doc-developpement-durable.org/file/Projets- informatiques/cours-&-manuels- informatiques/Linux/Linux%20Kernel%20Development,%203rd%20Edition.pdf

See Chapter 18 Debugging

Thanks! Bye Philipp

Hi, Philipp, I've found your answer too late. Thanks for the info(I learned something about the early_prink from the book). Actually, shortly after I sent my question, I learned how to make printk appear in the console (not in the dmesg buffer) and was using it. (I added the line "kernel.prink = 5 4 1 7" in the /etc/sysctl.conf file. So I've set the default console log level to 5 making default printk appear in the console.) Thanks! Chan

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