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To: Michael Ellerman <michael@ellerman.id.au>
Cc: <linux-kernel@vger.kernel.org>,
       Benjamin Herrenschmidt <benh@kernel.crashing.org>
Subject: Re: [RFC/PATCH] Make printk work for really early debugging
References: <20060518091410.CC527679F4@ozlabs.org>
From: Andi Kleen <ak@suse.de>
Date: 18 May 2006 15:55:34 +0200
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Michael Ellerman <michael@ellerman.id.au> 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.

-Andi