linux-kernel - Re: [PATCH] x86: Setup early console as early as possible

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Date:	Mon, 12 Jul 2010 11:11:21 -0700
From:	Yinghai Lu <yinghai.lu@...cle.com>
To:	"H. Peter Anvin" <hpa@...or.com>,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
CC:	Cyrill Gorcunov <gorcunov@...il.com>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86: Setup early console as early as possible

On 07/12/2010 11:09 AM, H. Peter Anvin wrote:
> On 07/12/2010 10:44 AM, Cyrill Gorcunov wrote:
>>
>> Peter, while reviewing this patch I found another nit in
>> context of early_param usage, so the patch is below. It's
>> completely trivial. Actually I thought I've already fixed
>> all early_param cases long ago but this one somehow sneaked ;)
>>
>> Anyway, Yinghai, Peter,
>>
>> I'm not sure but can't we use some boot_param "pad" field for
>> "being copied" flag instead of new variable? There is a case
>> when boot_param is used as __initdata and I'm not sure we clear
>> this section explicitly.
>>
> 
> Actually, even better would be to simply use boot_params.hdr.version,
> which will never be zero.

Jeremy,

any reason that xen cat not use x86_64_start_kernel directly?

Thanks

Yinghai
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