linux-kernel - Re: [PATCH 2/2] x86, boot: Optimize the elf header handling.

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Message-ID: <4FF06DF4.4000006@zytor.com>
Date:	Sun, 01 Jul 2012 08:34:12 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
CC:	hacklu <embedway.linux@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] x86, boot: Optimize the elf header handling.

On 07/01/2012 08:04 AM, H. Peter Anvin wrote:
>
> Sadly, this patch breaks the boot with of of my standard configurations
> (attached)... it goes into an infinite reboot loop.  This was the first
> config I tested, so it might very well break more.
>

Some more investigation: the boot crashes because the .data..percpu 
segment is all zero -- since this includes the GDT, we die quickly and 
dramatically only a handful of instructions into head_64.S.

I'm dropping this patchset for now.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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