linux-kernel - Re: [patches] [PATCH] [21/22] x86_64: Extend bzImage protocol for relocatable bzImage

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Message-ID: <m1bqh8dy79.fsf@ebiederm.dsl.xmission.com>
Date:	Sat, 28 Apr 2007 14:46:18 -0600
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Jeff Garzik <jeff@...zik.org>, Andi Kleen <ak@...e.de>,
	patches@...-64.org, Vivek Goyal <vgoyal@...ibm.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [patches] [PATCH] [21/22] x86_64: Extend bzImage protocol for relocatable bzImage

"H. Peter Anvin" <hpa@...or.com> writes:

> Eric W. Biederman wrote:
>> 
>> The boot protocol change is in 2.6.21 for arch/i386.
>> 
>> HPA looked at it a while ago.
>> 
>> All it does is set a flag that tells a bootloader.
>> "Hey. I can run when loaded a non-default address, and this is what
>>  you have to align me to."
>> 
>> All relocation processing happens in the kernel itself.
>> 
>> So it is all pretty trivial.
>> 
>
> Indeed.  We *did* find some problems with Grub with the early versions,
> those were addressed.

We found some failures that weren't root caused so we went to this
more conservative version.

RHEL5 is actually shipping the original version of these patches if I
recall correctly.

Eric
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