Re: Minimum build config for boot messages

Hi, Am 19.08.16 um 16:17 schrieb Andre Schmidt:

Hello,

what is the minimum config to build a linux kernel that just prints boot messages/errors?

I was going through my old experiments/notes and found that we used to get kernel boot message with vanilla allnoconfig.

make ARCH=x86_64 allnoconfig make all qemu-system-x86_64 -kernel arch/x86/boot/bzImage

Those commands above used to be enough, but now the produced kernel doesn't print any messages on the qemu screen.

Did you also disable CONFIG_PRINTK ? Without that kernel will not print anything, as far as I know. HTH, Best, - Johannes