I am using a Linux-v4.9.212. For a better linux kernel boot process debug, I would like to view all possible messages during the linux kernel boot. I have tried to set 2 different parameters in the "chosen" part of the device tree (.dtb) for that debug purpose but it has not brought about a printout of any additional messages. The parameters I used are "debug" and "initcall_debug". Please advise on the syntax of using these parameters and whether there could be another issue that could potentially disable the additional printout of the messages even though the parameters have been used correctly.
How to use Linux Kernel boot debug parameters?
- Thread starter amais
- Start date
What distro are you using? And what do you actually mean by a "better Linux kernel boot process debug"? Anyway, I recommend you read here https://www.kernel.org/doc/html/latest/ and here https://freedesktop.org/wiki/Software/systemd/Debugging/
Then, this might interest you https://www.thegeekdiary.com/centos-rhel-7-how-to-change-the-verbosity-of-debug-logs-during-booting/
So, you're booting the kernel with no OS?
I don't know about that. You might have better luck asking in the mailing list http://vger.kernel.org/
