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

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Message-Id: <20080806.001836.135194365.davem@davemloft.net>
Date:	Wed, 06 Aug 2008 00:18:36 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	jeff.chua.linux@...il.com
Cc:	linux-kernel@...r.kernel.org
Subject: Re: 2.6.27rc1 cannot boot more than 8CPUs

From: "Jeff Chua" <jeff.chua.linux@...il.com>
Date: Wed, 6 Aug 2008 14:42:11 +0800

> 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".

You have to turn off CONFIG_PROVE_LOCKING, in fact just turn off
everything in the lock debugging section:

# CONFIG_DEBUG_RT_MUTEXES is not set
# CONFIG_RT_MUTEX_TESTER is not set
# CONFIG_DEBUG_SPINLOCK is not set
# CONFIG_DEBUG_MUTEXES is not set
# CONFIG_DEBUG_LOCK_ALLOC is not set
# CONFIG_PROVE_LOCKING is not set
# CONFIG_LOCK_STAT is not set
# CONFIG_DEBUG_SPINLOCK_SLEEP is not set
# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
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