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

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Message-ID: <86802c440808060149s697fe9p43f0be72d464f75e@mail.gmail.com>
Date:	Wed, 6 Aug 2008 01:49:22 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Jeff Chua" <jeff.chua.linux@...il.com>
Cc:	"David Miller" <davem@...emloft.net>, linux-kernel@...r.kernel.org
Subject: Re: 2.6.27rc1 cannot boot more than 8CPUs

On Tue, Aug 5, 2008 at 11:42 PM, Jeff Chua <jeff.chua.linux@...il.com> wrote:
> On Wed, Aug 6, 2008 at 1:19 PM, David Miller <davem@...emloft.net> wrote:
>> From: "Jeff Chua" <jeff.chua.linux@...il.com>
>> Date: Wed, 6 Aug 2008 11:15:30 +0800
>> Do you have lockdep enabled?  If sure, try turning that off.
>
> It's enabled by default, and I can't seem to disable it even if I
> commented it out or delete it, it comes back after running "make".
>
> CONFIG_X86_32=y
> # CONFIG_X86_64 is not set
> CONFIG_X86=y
> CONFIG_ARCH_DEFCONFIG="arch/x86/configs/i386_defconfig"
> # CONFIG_GENERIC_LOCKBREAK is not set
> CONFIG_GENERIC_TIME=y
> CONFIG_GENERIC_CMOS_UPDATE=y
> CONFIG_CLOCKSOURCE_WATCHDOG=y
> CONFIG_GENERIC_CLOCKEVENTS=y
> CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y
> CONFIG_LOCKDEP_SUPPORT=y
> CONFIG_STACKTRACE_SUPPORT=y
> CONFIG_HAVE_LATENCYTOP_SUPPORT=y
> CONFIG_FAST_CMPXCHG_LOCAL=y
> CONFIG_MMU=y
> CONFIG_ZONE_DMA=y
> CONFIG_GENERIC_ISA_DMA=y
> CONFIG_GENERIC_IOMAP=y
> CONFIG_GENERIC_BUG=y
> CONFIG_GENERIC_HWEIGHT=y
>
>

do you have

CONFIG_X86_GENERICARCH=y
CONFIG_X86_BIGSMP=y

8 more cpu need bigsmp mode.

YH
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