linux-kernel - Re: 2.6.27rc1 cannot boot more than 8CPUs

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Message-ID: <20080813141629.GD19397@elte.hu>
Date:	Wed, 13 Aug 2008 16:16:29 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Jeff Chua <jeff.chua.linux@...il.com>
Cc:	Yinghai Lu <yhlu.kernel@...il.com>,
	David Miller <davem@...emloft.net>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.27rc1 cannot boot more than 8CPUs


* Jeff Chua <jeff.chua.linux@...il.com> wrote:

> On Wed, Aug 6, 2008 at 5:42 PM, Jeff Chua <jeff.chua.linux@...il.com>  
> wrote:
>>>> CONFIG_X86_GENERICARCH=y
>>>> CONFIG_X86_BIGSMP=y
>>>> 8 more cpu need bigsmp mode.
>
>> Just found it under " Subarchitecture Type (Generic architecture)",
>> and then it shows the CONFIG_X86_BIGSMP option.
>
> It works. Booted with 16CPUs. 32GB RAM.

btw., could you please check that v2.6.27-rc3 (or later) kernels boot 
fine (with about 8 cpus) even if you hae genericarch/bigsmp disabled, 
and do not silently hang as it happened on your box before?

	Ingo
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