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Message-ID: <20071115141501.GB28857@elte.hu>
Date: Thu, 15 Nov 2007 15:15:01 +0100
From: Ingo Molnar <mingo@...e.hu>
To: Gautham R Shenoy <ego@...ibm.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>,
Andrew Morton <akpm@...ux-foundation.org>,
linux-kernel@...r.kernel.org, Rusty Russel <rusty@...tcorp.com.au>,
Srivatsa Vaddagiri <vatsa@...ibm.com>,
Dipankar Sarma <dipankar@...ibm.com>,
Oleg Nesterov <oleg@...sign.ru>,
Paul E McKenney <paulmck@...ibm.com>,
Richard Gooch <rgooch@...f.csiro.au>,
Tigran Aivazian <tigran@...azian.fs.co.uk>,
Shoahua Li <shaohua.li@...ux.com>,
Ralf Baechle <ralf@...ux-mips.org>,
Heiko Carstens <heiko.carstens@...ibm.com>,
Nathan Lynch <ntl@...ox.com>, Paul Jackson <pj@....com>,
Christoph Lameter <clameter@....com>,
Pekka Enberg <penberg@...helsinki.fi>,
Akinobu Mita <akinobu.mita@...il.com>
Subject: Re: [RFC PATCH 1/3] cpu-hotplug: Refcount Based Cpu Hotplug
implementation
* Gautham R Shenoy <ego@...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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