linux-kernel - Re: system without RAM on node0 boot fail

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Message-ID: <86802c440801302306g2a1ae11h52b883eed79b7e96@mail.gmail.com>
Date:	Wed, 30 Jan 2008 23:06:53 -0800
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"H. Peter Anvin" <hpa@...or.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	"Andi Kleen" <ak@...e.de>
Cc:	"Christoph Lameter" <clameter@....com>,
	"Ingo Molnar" <mingo@...e.hu>, linux-kernel@...r.kernel.org
Subject: Re: system without RAM on node0 boot fail

On Jan 30, 2008 10:09 PM, H. Peter Anvin <hpa@...or.com> wrote:
> Christoph Lameter wrote:
> > x86 supports booting from a node without RAM?

it is a two sockets system. only 4G RAM installed on node1.

>
>  From the looks of it I would say he probably has the boot node numbered 1.
>
> The e820 map is also "interesting" - doesn't list the first 256 bytes,
> which corresponds to the first quarter(!) of the real-mode exception table.

i kexec that from 2.6.24 (with discontinuous and slab)
so that e820 is passed by kexec from first kernel. normal pxeboot will
have start for 0.

YH
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