Re: [RFC/PATCH] Make printk work for really early debugging

From: Andi Kleen
Date: Thu May 18 2006 - 09:57:20 EST

Michael Ellerman <michael@xxxxxxxxxxxxxx> writes:

> Currently printk is no use for early debugging because it refuses to actually
> print anything to the console unless cpu_online(smp_processor_id()) is true.

On x86-64 this is simply solved by setting the boot processor online very early.


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