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Date: Thu, 15 Nov 2007 15:15:01 +0100
From: Ingo Molnar <mingo@elte.hu>
To: Gautham R Shenoy <ego@in.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
       Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org,
       Rusty Russel <rusty@rustcorp.com.au>,
       Srivatsa Vaddagiri <vatsa@in.ibm.com>,
       Dipankar Sarma <dipankar@in.ibm.com>, Oleg Nesterov <oleg@tv-sign.ru>,
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       Richard Gooch <rgooch@atnf.csiro.au>,
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       Shoahua Li <shaohua.li@linux.com>, Ralf Baechle <ralf@linux-mips.org>,
       Heiko Carstens <heiko.carstens@de.ibm.com>,
       Nathan Lynch <ntl@pobox.com>, Paul Jackson <pj@sgi.com>,
       Christoph Lameter <clameter@sgi.com>,
       Pekka Enberg <penberg@cs.helsinki.fi>,
       Akinobu Mita <akinobu.mita@gmail.com>
Subject: Re: [RFC PATCH 1/3] cpu-hotplug: Refcount Based Cpu Hotplug
	implementation
Message-ID: <20071115141501.GB28857@elte.hu>
References: <20071115134924.GA15282@in.ibm.com> <20071115135108.GA15462@in.ibm.com>
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* Gautham R Shenoy <ego@in.ibm.com> wrote:

>  void lock_cpu_hotplug(void)
>  {
> -	struct task_struct *tsk = current;
> -
> -	if (tsk == recursive) {
> -		static int warnings = 10;
> -		if (warnings) {
> -			printk(KERN_ERR "Lukewarm IQ detected in hotplug locking\n");
> -			WARN_ON(1);
> -			warnings--;
> -		}
> -		recursive_depth++;

i nominate it for a 2.6.24 merge due to it fixing the above regression. 
I've seen regular instances of the "Lukewarm IQ" message.

	Ingo
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