linux-kernel - Re: [crash, bisected] Re: [PATCH 3/4] x86

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Message-ID: <m1wsk3r3g6.fsf@frodo.ebiederm.org>
Date:	Wed, 02 Jul 2008 21:34:17 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Mike Travis <travis@....com>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jack Steiner <steiner@....com>
Subject: Re: [crash, bisected] Re: [PATCH 3/4] x86_64: Fold pda into per cpu area

Mike Travis <travis@....com> writes:

> will only boot and run with gcc-4.2.0, and does the "failure at grub" screen
> with
> gcc-4.2.4 ...!

Do these tests have an early serial console enabled?  I want to confirm
that the failure is very early in boot before or just as we reach C code.

If you don't have an early console we could be failing late in the process just
not have visibility.

> Any other suggestions?

If you have a serial console to add a little bit of instrumentation super duper early.
Although looking at the generated objects might be just as interesting.

Eric

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